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, a magnetic circuit system of the sound production device comprises a magnetic conductive yoke, and side magnetic parts, a common magnetic part and two central magnetic parts which are arranged on the magnetic conductive yoke, the side magnetic parts are annularly arranged to form an accommodating space, the common magnetic part is located in the accommodating space and is connected with the side magnetic parts, and the two central magnetic parts are arranged in the accommodating space. The magnetic circuit system is arranged in the containing space to divide the containing space into two installation spaces, each center magnetic part is located in one installation space, the center magnetic parts, the side magnetic parts and the common magnetic part are spaced to define a magnetic gap, the vibration system comprises a vibrating diaphragm assembly and two voice coils, the periphery of the vibrating diaphragm assembly is connected to the shell and is opposite to the magnetic circuit system, and the two voice coils are arranged side by side. One end of each voice coil is connected to the diaphragm assembly, and the other end of each voice coil is suspended in one magnetic gap. According to the sound production device, the size of the voice coil and the magnet volume of the magnetic circuit system are increased, so that the BL value is improved, and the whole machine 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 sound-generating device is mostly a single voice coil structure, and the box space of electronic products is getting smaller and smaller, resulting in the size of the magnetic circuit system in the sound-generating device being limited and unable to 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. 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 voice coil size by setting a dual voice coil structure and increases the magnet volume of the magnetic circuit system to improve the BL value, 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 connected to the housing, the magnetic circuit system comprising a magnetic yoke and a side magnetic portion, a common magnetic portion and two central magnetic portions arranged on the magnetic yoke, the side magnetic portions being arranged in a ring shape to form a receiving space, the common magnetic portion being located in the receiving space and connected to the side magnetic portions to separate the receiving space into two installation spaces, each of the central magnetic portions being located in one of the installation spaces and spaced apart from the side magnetic portions and the common magnetic portions to enclose a magnetic gap; and

[0009] A vibration system, the vibration system includes a diaphragm assembly and two voice coils, the periphery of the diaphragm assembly is connected to the housing and is opposite to the magnetic circuit system, the two voice coils are arranged side by side, and one end of each voice coil is connected to the diaphragm assembly, and the other end of each voice coil is suspended in a magnetic gap.

[0010] In one embodiment, the edge magnet portion forms a closed integral ring structure to form the accommodation space in the center of the edge magnet portion;

[0011] Alternatively, the edge magnetic parts include a plurality of edge magnetic parts, and adjacent edge magnetic parts are connected end to end to form a closed ring structure, so as to form the accommodating space in the center of the plurality of edge magnetic parts.

[0012] In one embodiment, the edge magnet portion includes two first edge magnet portions extending along a first direction and two second edge magnet portions extending along a second direction, and the adjacent first edge magnet portions and the second edge magnet portions are connected end to end to form a ring structure, so that the two first edge magnet portions and the two second edge magnet portions enclose the accommodating space;

[0013] The two voice coils are arranged at intervals along the second direction, the common magnetic portion extends in the same direction as the first direction and is located between two adjacent voice coils, and two ends of the common magnetic portion are respectively connected to the two second side magnetic portions;

[0014] Wherein, the first direction and the second direction are arranged at an angle.

[0015] In one embodiment, the first side magnetic portion includes a first side magnet and a first side magnetic conductive plate which are stacked, the first side magnet is connected to the magnetic conductive yoke, and the second side magnetic portion includes a second side magnet and a second side magnetic conductive plate which are stacked, the second side magnet is connected to the magnetic conductive yoke;

[0016] The common magnetic part includes a common magnet and a common magnetic conductive plate which are stacked, the common magnet is connected to the magnetic conductive yoke, two ends of the common magnet are respectively connected to the two second side magnets, and two ends of the common magnetic conductive plate are respectively connected to the two second side magnetic conductive plates;

[0017] The first side magnetic conductive plate and the second side magnetic conductive plate are integrally formed to form a closed integral ring structure, and the adjacent first side magnets and the second side magnets are connected end to end to form a closed ring structure.

[0018] In one embodiment, the common magnet and the two second side magnets are an integrally formed structure;

[0019] And / or, the common magnetic conductive plate and the two second side magnetic conductive plates are an integrally formed structure;

[0020] And / or, the first side magnetic conductive plate and the second side magnetic conductive plate are integrally formed with the housing;

[0021] And / or, each of the central magnetic parts comprises a central magnet and a central magnetic conductive plate which are stacked, and the central magnet is connected to the magnetic conductive yoke;

[0022] And / or, the two central magnetic parts are symmetrically arranged with the common magnetic part as the symmetry axis;

[0023] And / or, the two voice coils are symmetrically arranged with the common magnetic part as a symmetry axis.

[0024] In one embodiment, each of the second side magnetic parts includes a main body and a protruding part protruding from the main body toward the shell, the protruding part is connected to the shell, and a side of the main body facing away from the protruding part is connected to the common magnetic part;

[0025] Wherein, from the protruding portion to the common magnetic portion, the cross-sectional area of ​​the main body portion along the second direction gradually increases.

[0026] In one embodiment, the edge magnetic portion is provided with an avoidance notch corresponding to the corner of the housing;

[0027] The vibration system further includes a frame and a centering support plate, wherein the frame includes a main body and a support leg connected to the periphery of the main body, the main body is connected to the diaphragm assembly and to the voice coil, the centering support plate is connected to the housing and is arranged corresponding to the avoidance notch, the support leg extends to the avoidance notch and is connected to the centering support plate;

[0028] Wherein, the lead wire of the voice coil extends along the support leg and is electrically connected to the centering support plate.

[0029] In one embodiment, the body portion encloses a through hole, and a side of the body portion facing the through hole extends toward the voice coil to form a first protrusion, and the first protrusion is connected to the voice coil;

[0030] And / or, the support legs include four, each of the support legs includes a straight section connected to the main body and an extension section extending from the straight section toward the avoidance notch, and the extension section is connected to the centering support sheet;

[0031] And / or, the centering support includes four, each of which is arranged corresponding to one of the avoidance gaps, each of which includes an external connection portion, an internal connection portion, and an elastic arm portion connecting the external connection portion and the internal connection portion, the external connection portion is connected to the housing, the internal connection portion is connected to the support leg portion, and is provided with an internal pad electrically connected to the lead of the voice coil;

[0032] And / or, the magnetic yoke is provided with a relief area corresponding to the relief gap, and the relief area is a recessed groove or a through hole.

[0033] In one embodiment, the diaphragm assembly includes a diaphragm and a vibration plate, the diaphragm includes an inner ring portion, a folded ring portion, and a fixed portion connected in sequence from the inside to the outside, the inner ring portion is connected to the vibration plate, the fixed portion is connected to the housing, and the body portion is connected to the vibration plate;

[0034] Wherein, the vibration plate is provided with a second protrusion extending toward the voice coil, and the second protrusion is connected to the voice coil; and / or, one end of the fixing portion away from the folding ring portion is bent and extended toward the outer shell to form a bent portion, and the bent portion is connected to the outer wall of the outer shell.

[0035] The present invention further provides an electronic device, which includes the sound-generating device described above.

[0036] The sound-generating device of the technical solution of the present invention is achieved by accommodating a vibration system and a magnetic circuit system in a housing, and forming two magnetic gaps in the magnetic circuit system, and configuring the vibration system to be a diaphragm assembly and two voice coils connected to the diaphragm assembly, so that the periphery of the diaphragm assembly is connected to the housing and is opposite to the magnetic circuit system, and the two voice coils are arranged side by side, so that one end of each voice coil is connected to the diaphragm assembly, and the other end of each voice coil is suspended in a magnetic gap, so that current is passed through the two voice coils, so that the two voice coils convert electrical energy into mechanical energy in the two magnetic gaps formed by the magnetic circuit system, so as to drive the two voice coils to drive the diaphragm assembly to vibrate, thereby achieving sound generation, and by configuring a dual voice coil structure, increasing the voice coil size, and improving the L value of the voice coil, so that the two voice coils are in the magnetic circuit. The BL value is effectively increased when the system vibrates in the magnetic field formed by the system, thereby improving the performance of the whole machine and the loudness of the sound effect; at the same time, by configuring the magnetic circuit system as a magnetic yoke and a side magnetic part, a common magnetic part and two central magnetic parts arranged on the magnetic yoke, the side magnetic parts are arranged in a ring shape to form a accommodating space, and the common magnetic part is arranged in the accommodating space and connected with the side magnetic part to divide the accommodating space into two installation spaces, and each central magnetic part is arranged in an installation space, so that each central magnetic part is spaced from the side magnetic part and the common magnetic part to enclose a magnetic gap, which can effectively increase the magnet volume of the magnetic circuit system, thereby increasing the magnetic field strength of the magnetic circuit system, so that the voice coil can effectively increase the BL value when vibrating 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

[0037] 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.

[0038] 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;

[0039] Figure 2 A bottom-up structural schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0040] Figure 3 A cross-sectional schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0041] Figure 4 An exploded schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0042] Figure 5 A schematic structural diagram of an embodiment of a sound-generating device provided by the present invention without the magnetic yoke;

[0043] Figure 6 A schematic diagram of the structure of the connection between the side magnetic part and the common magnetic part in one embodiment of the sound-generating device provided by the present invention;

[0044] Figure 7 A schematic structural diagram of an embodiment of a skeleton provided by the present invention;

[0045] Figure 8 This is a comparison chart of the FR curves of the sound-generating device provided by the present invention and the prior art.

[0046] Description of Figure Numbers:

[0047] 100. Sound-generating device; 1. Shell; 11. First side; 12. Second side; 13. Corner; 2. Magnetic circuit system; 21. Magnetic yoke; 211. Avoidance area; 22. Center magnetic part; 221. Center magnet; 222. Center magnetic plate; 23. Side magnetic part; 231. First side magnetic part; 2311. First side magnet; 2312. First side magnetic plate; 232. Second side magnetic part; 2321. Second side magnet; 2322. Second side magnetic plate; 233. Accommodating space; 234. Main body; 235. Protrusion; 236. Avoidance gap; 24. Common magnetic part; 241. Installation space ; 242. Common magnet; 243. Common magnetic conductive plate; 25. Magnetic gap; 3. Vibration system; 31. Diaphragm assembly; 311. Diaphragm; 3111. Inner ring portion; 3112. Folding ring portion; 3113. Fixed portion; 3114. Bend portion; 312. Vibration plate; 3121. Second protrusion; 32. Voice coil; 33. Skeleton; 331. Main body; 3311. Through hole; 3312. First protrusion; 332. Support foot portion; 3321. Straight section; 3322. Extension section; 34. Centering support plate; 341. External connection portion; 342. Internal connection portion; 343. Elastic arm portion; 344. Internal solder pad.

[0048] 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

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] In the related art, most sound-generating devices are single voice coil structures, and 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. Therefore, how to achieve the best sound effect in an effective space is the pursuit of the application of sound-generating devices.

[0056] 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 dual voice coil 32 structure under limited space conditions, increases the total length of the voice coil 32, increases the L value of the voice coil 32, and sets the magnetic circuit system 2 as a ring magnetic circuit, thereby effectively increasing the magnet volume of the magnetic circuit system 2 to increase the BL value, thereby greatly improving the overall performance and sound loudness.

[0057] Please refer to Figures 1 to 7As shown, in the 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, and the magnetic circuit system 2 includes a magnetic yoke 21 and a side magnetic portion 23, a common magnetic portion 24 and two central magnetic portions 22 arranged on the magnetic yoke 21, the side magnetic portion 23 is arranged in a ring shape to form a containing space 233, and the common magnetic portion 24 is located in the containing space 233 and is connected to the side magnetic portion 23 to separate the containing space 233. There are two installation spaces 241. Each central magnetic part 22 is located in an installation space 241 and is spaced from the side magnetic part 23 and the common magnetic part 24 to enclose a magnetic gap 25. The vibration system 3 includes a diaphragm assembly 31 and two voice coils 32. The periphery of the diaphragm assembly 31 is connected to the outer shell 1 and is opposite to the magnetic circuit system 2. The two voice coils 32 are arranged side by side, and one end of each voice coil 32 is connected to the diaphragm assembly 31, and the other end of each voice coil 32 is suspended in a magnetic gap 25.

[0058] 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.

[0059] 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 5 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 .

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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 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.

[0064] 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. That is, the first side 11 and the second side 12 of the housing 1 are arranged perpendicularly, and the housing 1 is a rectangular frame structure.

[0065] 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 .

[0066] Understandable, such as Figure 1 , Figure 3 , Figure 4 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 sequentially connected 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 two voice coils 32 are connected to the vibration plate 312.

[0067] 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.

[0068] In order to further improve the connection stability and waterproof sealing between the diaphragm 311 and the housing 1, the outer peripheral edge of the diaphragm 311 is bent and extended toward the housing 1 to form a bending portion 3114, and the bending portion 3114 is connected to the outer wall of the housing 1. In this embodiment, one end of the fixing portion 3113 away from the folding ring portion 3112 is bent and extended toward the housing 1 to form the bending portion 3114, and the bending portion 3114 is connected to the outer wall of the housing 1, that is, the bending portion 3114 is formed by the outer peripheral edge of the fixing portion 3113 of the diaphragm 311 bending and extending toward the housing 1. Optionally, the inner ring portion 3111, the folding ring portion 3112, the fixing portion 3113 and the bending portion 3114 of the diaphragm 311 are an integrally formed structure.

[0069] In order to adjust the positions of the two voice coils 32 in the two magnetic gaps 25, in one embodiment, the vibration plate 312 is provided with a second protrusion 3121 extending toward the two voice coils 32, and the second protrusion 3121 is respectively connected to the two voice coils 32, that is, one end of each voice coil 32 is connected to the second protrusion 3121, and the other end of each voice coil 32 is suspended in a magnetic gap 25. In this way, the two voice coils 32 can be placed in appropriate positions of the two magnetic gaps 25 through the second protrusion 3121 of the vibration plate 312, ensuring that the magnetic flux lines in the magnetic gap 25 pass through the voice coils 32.

[0070] It should be noted that in the related art, the sound-emitting device 100 is usually set to a single voice coil structure, and the sound-emitting device 100 is limited by the box space of the electronic product, resulting in the size of the magnetic circuit system 2 in the sound-emitting device 100 being limited and unable to 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-emitting device.

[0071] In the present embodiment, a dual voice coil 32 structure is provided, and the two voice coils 32 are arranged side by side, so that the total length of the voice coil 32 is effectively increased by using the two voice coils 32, and the L value of the voice coil 32 is improved; at the same time, by providing the magnetic circuit system 2 with a magnetic yoke 21 and a side magnetic portion 23, a common magnetic portion 24 and two central magnetic portions 22 arranged on the magnetic yoke 21, and arranging the side magnetic portion 23 in a ring shape to form an accommodating space 233, the volume of the side magnetic portion 23 can be effectively increased, and the common magnetic portion 24 is arranged in the accommodating space 233 and is connected to the side magnetic portion 23. The two central magnetic parts 22 are connected to each other so as to separate the accommodating space 233 into two installation spaces 241, and each central magnetic part 22 is arranged in an installation space 241, that is, the two central magnetic parts 22 are located on opposite sides of the common magnetic part 24, and the side magnetic parts 23 are arranged around the periphery of the two central magnetic parts 22 and the common magnetic part 24, so that the magnet volume of the magnetic circuit system 2 can be effectively increased, thereby increasing the magnetic field strength of the magnetic circuit system 2, so that the two voice coils 32 can effectively improve the BL value when they vibrate in the magnetic field formed by the magnetic circuit system 2, thereby improving the performance of the whole machine and the sound loudness, such as Figure 8As shown. It can be understood that the sound-generating device 100 of the present invention not only increases the total length of the voice coil 32 and improves the L value of the voice coil 32 by setting the dual voice coil 32 structure and setting the magnetic circuit system 2 as a ring magnetic circuit, but also effectively increases the magnet volume of the magnetic circuit system 2 to improve the BL value. Compared with the conventional speaker in the prior art, the actual simulated BL value increases by 8%, and the BL value is significantly improved.

[0072] It should be noted that in order to further increase the total length of the voice coil 32, the number of voice coils 32 can be set to ≥2, and on this basis, the annular magnetic circuit is further designed to increase the magnet volume of the magnetic circuit system 2, thereby improving the BL value. It can be understood that the number of voice coils 32 is consistent with the number of central magnetic parts 22. When the number of voice coils 32 is N, and N≥2, the number of central magnetic parts 22 is N, and the number of shared magnetic parts 24 is N-1.

[0073] It can be understood that when the number of voice coils 32 is multiple, there are multiple central magnetic parts 22 and multiple common magnetic parts 24. At this time, the side magnetic parts 23 are arranged in a ring shape to form an accommodating space 233. Multiple central magnetic parts 22 and multiple common magnetic parts 24 are alternately arranged in the accommodating space 233 formed by the side magnetic parts 23, and the side-by-side direction of the multiple central magnetic parts 22 and the multiple common magnetic parts 24 is consistent with the side-by-side direction of the voice coil 32. At this time, the central magnetic part 22 close to the side magnetic part 23 is located between the side magnetic part 23 and the common magnetic part 24, and the central magnetic part 22 is spaced from the side magnetic part 23 and the common magnetic part 24 to form a magnetic gap 25. Each central magnetic part 22 in the middle central magnetic part 22 is located between two common magnetic parts 24 and forms a magnetic gap 25 with the two common magnetic parts 24, that is, two adjacent magnetic gaps 25 share a common magnetic part 24. At this time, each voice coil 32 is arranged around a central magnetic part 22 and suspended in a magnetic gap 25, which is not limited here.

[0074] In this embodiment, two voice coils 32 are used as an example for explanation. 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 opposite sides of the common magnetic portion 24 and extend along the first direction, and the side magnetic portions 23 are arranged in a ring-shaped arrangement to form an accommodating space 233, that is, the two central magnetic portions 22 and the common magnetic portion 24 are both accommodated in the accommodating space 233, so that each central magnetic portion 22 is spaced from the side magnetic portion 23 and the common magnetic portion 24 to enclose a magnetic gap 25, so that the two voice coils 32 are suspended in the two magnetic gaps 25 respectively. It can be understood that by setting up a dual voice coil 32 structure, and setting the side magnetic part 23 of the magnetic circuit system 2 as a ring structure, and arranging the two central magnetic parts 22 and the common magnetic part 24 in the accommodating space 233 formed by the side magnetic part 23, it is arranged according to the structure of the dual 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 performance of the whole machine and the loudness of the sound effect.

[0075] It can be understood that the two voice coils 32 extend along the first direction, and the two voice coils 32 are arranged at intervals along the second direction. Figure 4 and Figure 5 As shown, each voice coil 32 has two first long sides and two second long sides connected end to end, the two first long sides extend along a first direction, and the two second long sides extend along a second direction, which is not limited here.

[0076] In one embodiment, the edge magnet portion 23 forms a closed integral ring structure to form a receiving space 233 in the center of the edge magnet portion 23. It can be understood that this can effectively increase the magnet volume of the edge magnet portion 23, thereby improving the magnetic field strength.

[0077] Of course, in other embodiments, the edge magnet portion 23 includes multiple adjacent edge magnet portions 23 connected end to end to form a closed ring structure, so as to form an accommodating space 233 in the center of the multiple edge magnet portions 23, which is not limited here.

[0078] The sound-generating device 100 of the present invention is achieved by accommodating the vibration system 3 and the magnetic circuit system 2 in the housing 1, and forming two magnetic gaps 25 in the magnetic circuit system 2, and setting the vibration system 3 to be a diaphragm assembly 31 and two voice coils 32 connected to the diaphragm assembly 31, so that the periphery of the diaphragm assembly 31 is connected to the housing 1 and is opposite to the magnetic circuit system 2, and the two voice coils 32 are arranged side by side, so that one end of each voice coil 32 is connected to the diaphragm assembly 31, and the other end of each voice coil 32 is suspended in a magnetic gap 25, so that current is passed through the two voice coils 32, so that the two voice coils 32 convert electrical energy into mechanical energy in the two magnetic gaps 25 formed by the magnetic circuit system 2, so as to drive the two voice coils 32 to drive the diaphragm assembly 31 to vibrate, thereby achieving sound generation, and by setting a dual voice coil 32 structure, increasing the size of the voice coil 32, and improving the L value of the voice coil 32, the two voice coils 32 in the magnetic circuit system 2, 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 and sound loudness of the whole machine; at the same time, by setting the magnetic circuit system 2 as the magnetic yoke 21 and the side magnetic part 23, the common magnetic part 24 and the two central magnetic parts 22 arranged on the magnetic yoke 21, the side magnetic part 23 is arranged in a ring shape to form a accommodating space 233, and the common magnetic part 24 is arranged in the accommodating space 233 and connected with the side magnetic part 23, so as to divide the accommodating space 233 into two installation spaces 241, and each central magnetic part 22 is arranged in an installation space 241, so that each central magnetic part 22 is spaced from the side magnetic part 23 and the common magnetic part 24 to enclose a magnetic gap 25, so that the magnet volume of the magnetic circuit system 2 can be effectively increased, thereby increasing the magnetic field strength of the magnetic circuit system 2, so that the voice coil 32 can effectively increase the BL value when vibrating in the magnetic field formed by the magnetic circuit system 2, thereby improving the performance and sound loudness of the whole machine.

[0079] It is understandable that the two voice coils 32 can be connected in series or in parallel. In this embodiment, the two voice coils 32 of the sound-generating device 100 can be connected to the external circuit through the centering support 34 or the conductive connector. At this time, the two voice coils 32 can form a series circuit or a parallel circuit through the centering support 34 or the conductive connector, which is not limited here.

[0080] In one embodiment, the edge magnet portion 23 includes two first edge magnet portions 231 extending along the first direction and two second edge magnet portions 232 extending along the second direction, and the adjacent first edge magnet portions 231 and the second edge magnet portions 232 are connected end to end to form a ring structure, so that the two first edge magnet portions 231 and the two second edge magnet portions 232 enclose a accommodating space 233; the two voice coils 32 are arranged at intervals along the second direction, the extension direction of the common magnetic portion 24 is consistent with the first direction, and is located between the two adjacent voice coils 32, and the two ends of the common magnetic portion 24 are respectively connected to the two second edge magnet portions 232; wherein the first direction is set at an angle to the second direction.

[0081] In this embodiment, if Figures 4 to 6 As shown, by setting the edge magnet part 23 as a split structure, that is, two first edge magnet parts 231 and two second edge magnet parts 232, the two first edge magnet parts 231 extend along the first direction, the two second edge magnet parts 232 extend along the second direction, and the adjacent first edge magnet parts 231 and second edge magnet parts 232 are connected end to end to form an annular structure, that is, the two first edge magnet parts 231 and the two second edge magnet parts 232 enclose to form a closed accommodating space 233. Of course, in other embodiments, the edge magnet part 23 can also be set as a closed integrated annular structure, which is not limited here.

[0082] Understandable, such as Figures 4 to 6 As shown, the common magnetic portion 24 may optionally extend along the first direction, and the two ends of the common magnetic portion 24 are respectively connected or abutted with the two second side magnetic portions 232. Optionally, the two center magnetic portions 22 are symmetrically arranged with the common magnetic portion 24 as the symmetry axis. In this embodiment, the two voice coils 32 are symmetrically arranged with the common magnetic portion 24 as the symmetry axis. In this way, the two voice coils 32 are symmetrically arranged on the diaphragm assembly 31, so that when the magnetic circuit system 2 drives the two voice coils 32 to vibrate, the polarization or vibration imbalance of the two voice coils 32 can be improved.

[0083] In the present embodiment, two voice coils 32 are arranged at intervals along the second direction, and each voice coil 32 extends along the first direction. Optionally, the extension direction of the common magnetic portion 24 is consistent with the first direction, and is located between two adjacent voice coils 32. It can be understood that by connecting the two ends of the common magnetic portion 24 to the two second side magnetic portions 232 respectively, the common magnetic portion 24 and the side magnetic portion 23, a first side magnetic portion 231 and two second side magnetic portions 232 are partially enclosed to form a closed installation space 241, so that each central magnetic portion 22 is located in an installation space 241, and is spaced from the side magnetic portion 23 and the common magnetic portion 24 to enclose a magnetic gap 25, thereby effectively increasing the magnet volume of the magnetic circuit system 2 to improve the BL value.

[0084] Optionally, the common magnetic portion 24 and the two second edge magnetic portions 232 of the edge magnetic portion 23 may be an integrally formed structure; or, the common magnetic portion 24 and the two second edge magnetic portions 232 of the edge magnetic portion 23 may also be separate structures, which is not limited here.

[0085] In one embodiment, the first side magnetic portion 231 includes a first side magnet 2311 and a first side magnetic conductive plate 2312 which are stacked, and the first side magnet 2311 is connected to the magnetic yoke 21. The second side magnetic portion 232 includes a second side magnet 2321 and a second side magnetic conductive plate 2322 which are stacked, and the second side magnet 2321 is connected to the magnetic yoke 21. The common magnetic portion 24 includes a common magnet 242 and a common magnetic conductive plate 243 which are stacked, and the common magnet 242 is connected to the magnetic yoke 21. Both ends of the common magnet 242 are respectively connected to the two second side magnets 2321, and both ends of the common magnetic conductive plate 243 are respectively connected to the two second side magnetic conductive plates 2322.

[0086] In this embodiment, if Figure 4 As shown, each central magnetic part 22 includes a stacked central magnet 221 and a central magnetic conductive plate 222, and the central magnet 221 is connected to the magnetic conductive yoke 21. It can be understood that the first side magnet 2311 and the first side magnetic conductive plate 2312 of the first side magnetic part 231 are stacked along the vibration direction of the vibration system 3, the second side magnet 2321 and the second side magnetic conductive plate 2322 of the second side magnetic part 232 are stacked along the vibration direction of the vibration system 3, the common magnet 242 and the common magnetic conductive plate 243 of the common magnetic part 24 are stacked along the vibration direction of the vibration system 3, and the central magnet 221 and the central magnetic conductive plate 222 of the central magnetic part 22 are stacked along the vibration direction of the vibration system 3.

[0087] Optionally, the first side magnetic conductive plate 2312 and the second side magnetic conductive plate 2322 are integrally formed to form a closed integral ring structure, and the adjacent first side magnets 2311 and second side magnets 2321 are connected end to end to form a closed ring structure.

[0088] 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 of the magnetic circuit system 2, the two first side magnetic parts 231 of the side magnetic part 23, and the central magnetic part 22 all extend along the first direction, and the two first side magnetic parts 231 correspond to the two first side edges 11 of the shell 1 respectively. The two second side magnetic parts 232 of the side magnetic part 23 extend along the second direction, and the two second side magnetic parts 232 correspond to the two second side edges 12 of the shell 1 respectively. At this time, the two first side magnetic parts 231 and the two second side magnetic parts 232 of the side magnetic part 23 are connected end to end to form a closed accommodating space 233, and a central magnetic part 22, the common magnetic part 24, and the other central magnetic part 22 are arranged at intervals along the second direction in the accommodating space 233.

[0089] Optionally, the first side magnetic conductive plate 2312 and the second side magnetic conductive plate 2322 are integrally formed with the housing 1. It can be understood that this can simplify the processing steps of the side magnetic conductive plates of the housing 1 and the side magnetic portion 23 and improve the connection stability.

[0090] It can be understood that each voice coil 32 is disposed around a central magnetic portion 22. Figure 4 , Figure 5 As shown, each voice coil 32 corresponds to a first side 11, and each voice coil 32 extends along the first direction. Optionally, the two voice coils 32 are symmetrically arranged, that is, the two voice coils 32 are symmetrically arranged with the common magnetic part 24 as the symmetry axis.

[0091] 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, the two first side magnetic parts 231 of the side magnetic part 23 are symmetrically arranged with the common magnetic part 24 as the symmetry axis, and the two second side magnetic parts 232 of the side magnetic part 23 are symmetrically arranged. Such an arrangement can ensure that the two voice coils 32 of the voice coil 32 are in the same magnetic field environment, so that when the magnetic circuit system 2 drives the two voice coils 32 to vibrate, the polarization or vibration imbalance of the voice coil 32 can be improved.

[0092] Optionally, the common magnetic portion 24 and the two second side magnetic portions 232 are integrally formed. Figures 4 to 6 As shown, the common magnet 242 and the two second side magnets 2321 may be an integrally formed structure. The common magnetic conductive plate 243 and the two second side magnetic conductive plates 2322 may be an integrally formed structure.

[0093] In one embodiment, each second side magnetic portion 232 includes a main body portion 234 and a protrusion 235 protruding from the main body portion 234 toward the outer shell 1, the protrusion 235 is connected to the outer shell 1, and the side of the main body portion 234 facing away from the protrusion 235 is connected to the common magnetic portion 24; wherein, from the protrusion 235 to the common magnetic portion 24, the cross-sectional area of ​​the main body portion 234 along the second direction gradually increases.

[0094] In this embodiment, if Figures 4 to 6 As shown, by setting the second edge magnet portion 232 of the edge magnet portion 23 as a main body portion 234 and a protrusion 235, on the one hand, the protrusion 235 is used to connect with the housing 1 to improve the connection stability, and on the other hand, the magnet volume of the second edge magnet portion 232 can be further increased, which can effectively improve the magnetic field strength, thereby improving the BL value, and further improving the performance of the whole machine and the loudness of the sound effect.

[0095] It can be understood that the protrusion 235 of the second side magnet portion 232 protrudes from the main body portion 234 toward the housing 1, and the protrusion 235 and the main body portion 234 of the second side magnet portion 232 can be an integrally formed structure. In this embodiment, the side of the main body portion 234 of the second side magnet portion 232 facing away from the protrusion 235 is connected to the common magnetic portion 24, and optionally, the second side magnet portion 232 and the common magnetic portion 24 are an integrally formed structure.

[0096] It should be noted that the second side magnet 2321 and the second side magnetic conductive plate 2322 of the second side magnetic part 232 both include a main body 234 and a protruding portion 235. Optionally, the second side magnetic conductive plate 2322 of the second side magnetic part 232 and the common magnetic conductive plate 243 of the common magnetic part 24 are an integrally formed structure. It can be understood that this can not only improve the connection stability, but also simplify the processing steps.

[0097] In this embodiment, the cross-sectional area of ​​the main body 234 along the second direction gradually increases from the protrusion 235 to the common magnetic part 24, that is, along the first direction. This can effectively ensure that the magnet volume of the second side magnetic part 232 adjacent to the magnetic gap 25 is larger, thereby ensuring the driving force on the voice coil 32 in the magnetic gap 25. It can be understood that by setting the cross-sectional area of ​​the main body 234 of the second side magnetic part 232 along the second direction to gradually increase, an avoidance gap 236 is formed between the second side magnetic part 232 and the second side 12 of the housing 1. Optionally, the avoidance gap 236 is set corresponding to the corner 13 of the housing 1.

[0098] In one embodiment, the edge magnet portion 23 is provided with an avoidance gap 236 corresponding to the corner portion 13 of the shell 1; the vibration system 3 also includes a skeleton 33 and a centering support piece 34, the skeleton 33 includes a main body portion 331 and a support leg portion 332 connected to the periphery of the main body portion 331, the main body portion 331 is connected to the diaphragm assembly 31, and is connected to the voice coil 32, the centering support piece 34 is connected to the shell 1, and is provided corresponding to the avoidance gap 236, the support leg portion 332 extends to the avoidance gap 236, and is connected to the centering support piece 34; wherein, the lead of the voice coil 32 extends along the support leg portion 332 and is electrically connected to the centering support piece 34.

[0099] In this embodiment, if Figure 2 , Figure 4 and Figure 5As shown, by forming an escape notch 236 between the edge magnet portion 23 and the corner portion 13 of the housing 1, the escape notch 236 is conveniently used to provide installation and escape space for the centering support 34. It can be understood that by providing the skeleton 33 and the centering support 34, the voice coil 32 is connected to the diaphragm assembly 31 through the skeleton 33, so that the voice coil 32 can be ensured to be in a more reasonable magnetic field, that is, the area with the largest magnetic flux density, thereby effectively improving the BL value; at the same time, by providing the centering support 34, the lead of the voice coil 32 can be connected to the external circuit by using the centering support 34, and the problem of swing or polarization of the voice coil 32 during vibration can be avoided by using the centering support 34.

[0100] It can be understood that an escape notch 236 is formed between the second edge magnet portion 232 of the edge magnet portion 23 and the corner portion 13 of the housing 1, and the centering support piece 34 is connected to the housing 1 and is arranged corresponding to the escape notch 236. In this embodiment, by configuring the skeleton 33 as a body portion 331 and a support leg portion 332 connected to the periphery of the body portion 331, the support leg portion 332 of the skeleton 33 extends to the escape notch 236 and is connected to the centering support piece 34, so that the lead wire of the voice coil 32 extends along the support leg portion 332 and is electrically connected to the centering support piece 34, thereby ensuring that the voice coil 32 is connected and conductive with the centering support piece 34.

[0101] In one embodiment, the body portion 331 encloses a through hole 3311 , and a side of the body portion 331 facing the through hole 3311 extends toward the voice coil 32 to form a first protrusion 3312 , and the first protrusion 3312 is connected to the voice coil 32 .

[0102] In this embodiment, if Figure 4 and Figure 7 As shown, the body 331 of the skeleton 33 may be an annular structure, that is, the body 331 is arranged in an annular shape. Optionally, the body 331 is arranged in a rectangular annular shape, and the leg 332 includes a plurality of leg 332, and the plurality of leg 332 are respectively arranged at the four corners of the body 331. It can be understood that by extending the first protrusion 3312 toward the voice coil 32 on one side of the body 331 adjacent to the through hole 3311, the first protrusion 3312 is connected to the two voice coils 32, so that the two voice coils 32 can be placed in a more reasonable magnetic field, that is, the area with the largest magnetic flux density, through the first protrusion 3312, thereby effectively improving the BL value.

[0103] Optionally, the foot portion 332 includes four. Figure 4 and Figure 7As shown, each leg portion 332 has a straight section 3321 connected to the main body portion 331 and an extension section 3322 extending from the straight section 3321 toward the avoidance notch 236, and the extension section 3322 is connected to the centering support piece 34. It can be understood that this can ensure that the leg portion 332 smoothly extends to the corner 13 of the housing 1 and passes through the avoidance notch 236 to connect to the centering support piece 34.

[0104] In this embodiment, four avoidance gaps 236 are formed at the edge magnet portion 23 and the four corners 13 of the housing 1. Optionally, the centering support pieces 34 include four. The four centering support pieces 34 are respectively arranged corresponding to the four avoidance gaps 236.

[0105] In one embodiment, each centering support piece 34 is provided corresponding to an avoidance gap 236, and each centering support piece 34 includes an external connection portion 341, an internal connection portion 342, and an elastic arm portion 343 connecting the external connection portion 341 and the internal connection portion 342, the external connection portion 341 is connected to the outer shell 1, the internal connection portion 342 is connected to the support foot portion 332, and an internal solder pad 344 is provided which is electrically connected to the lead of the voice coil 32.

[0106] In this embodiment, if Figure 2 , Figure 4 , Figure 5 As shown, the outer connecting portion 341, the elastic arm portion 343 and the inner connecting portion 342 of the centering support piece 34 can be an integrally formed structure. This can effectively ensure the structural strength of the centering support piece 34 and simplify the processing steps of the centering support piece 34. It can be understood that in order to ensure the deformation ability of the centering support piece 34, the elastic arm portion 343 has at least one bend.

[0107] Alternatively, if Figure 2 , Figure 4 and Figure 5 As shown, the outer connection portion 341, the elastic arm portion 343 and the inner connection portion 342 of the centering support 34 can be located in the same plane. Of course, in other embodiments, the outer connection portion 341 and the inner connection portion 342 of the centering support 34 can also be located in different planes. It can be understood that the centering support 34 is used to connect the external circuit to the voice coil 32, and the centering support 34 can also be used to effectively prevent the voice coil 32 from swinging or polarizing during vibration.

[0108] In order to facilitate the electrical connection between the centering support 34 and the voice coil 32, in this embodiment, the inner connection portion 342 of the centering support 34 is provided with an inner pad 344, and the inner pad 344 is electrically connected to the lead of the voice coil 32. In order to facilitate the connection and conduction between the centering support 34 and the external circuit, in this embodiment, the external connection portion 341 is provided with an outer pad for connecting to the external circuit, that is, the outer pad is electrically connected to the external circuit, which is not limited here.

[0109] In one embodiment, the magnetic yoke 21 is provided with a relief area 211 corresponding to the relief gap 236. Figure 2 , Figure 4 and Figure 5 As shown, by providing an avoidance area 211 on the magnetic yoke 21 , the avoidance area 211 can be used to provide avoidance for the centering support 34 during the vibration of the voice coil 32 , ensuring that the inner connecting portion 342 of the centering support 34 will not touch the magnetic yoke 21 .

[0110] Optionally, the avoidance area 211 is a recessed groove or a through hole. It can be understood that the avoidance area 211 is a recessed groove, that is, a groove structure formed by the side of the magnetic yoke 21 facing the centering support plate 34 being recessed in a direction away from the centering support plate 34. Alternatively, the avoidance area 211 is a through hole, that is, the through hole passes through the magnetic yoke 21; at the same time, the avoidance area 211 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.

[0111] In one embodiment, 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 sequentially connected 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 main body portion 331 is connected to the vibration plate 312; wherein the vibration plate 312 is provided with a second protrusion 3121 extending toward the voice coil 32, and the second protrusion 3121 is connected to the voice coil 32.

[0112] In this embodiment, if Figure 3 and Figure 4 As shown, by connecting the body 331 of the skeleton 33 with the vibration plate 312, the voice coil 32 is connected to the vibration plate 312 of the diaphragm assembly 31 through the skeleton 33, so as to ensure that the voice coil 32 drives the diaphragm assembly 31 to vibrate. It can be understood that by providing a second protrusion 3121 extending toward the voice coil 32 on the vibration plate 312, the second protrusion 3121 is connected to the voice coil 32, so as to ensure that the voice coil 32 can be connected to the first protrusion 3312 of the skeleton 33 and the second protrusion 3121 of the vibration plate 312 at the same time, and the connection stability of the voice coil 32 is further improved.

[0113] 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 setting a dual voice coil 32 structure. At the same time, the common magnetic part 24, the side magnetic part 23 and the two central magnetic parts 22 of the magnetic circuit system 2 are designed to correspond to the structural setting of the dual voice coil 32, and the side magnetic part 23 is set as a ring magnetic circuit, so that 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 is controlled by the dual voice coil 32 and the magnetic circuit shape design, so that the actual simulation BL value is increased by 8%, 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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 connected to the housing, the magnetic circuit system comprising a magnetic yoke and a side magnetic portion, a common magnetic portion and two central magnetic portions arranged on the magnetic yoke, the side magnetic portions being arranged in a ring shape to form a housing space, the common magnetic portion being located in the housing space and connected to the side magnetic portions to separate the housing space into two installation spaces, each of the central magnetic portions being located in one of the installation spaces and spaced apart from the side magnetic portions and the common magnetic portions to enclose a magnetic gap; and A vibration system, the vibration system includes a diaphragm assembly and two voice coils, the periphery of the diaphragm assembly is connected to the housing and is opposite to the magnetic circuit system, the two voice coils are arranged side by side, and one end of each voice coil is connected to the diaphragm assembly, and the other end of each voice coil is suspended in a magnetic gap.

2. The sound-generating device according to claim 1, characterized in that: The edge magnet part forms a closed integral annular structure to form the accommodation space in the center of the edge magnet part; Alternatively, the edge magnetic parts include a plurality of edge magnetic parts, and adjacent edge magnetic parts are connected end to end to form a closed ring structure, so as to form the accommodating space in the center of the plurality of edge magnetic parts.

3. The sound generating device according to claim 1, characterized in that: The edge magnet portion includes two first edge magnet portions extending along a first direction and two second edge magnet portions extending along a second direction, and the adjacent first edge magnet portions and the adjacent second edge magnet portions are connected end to end to form a ring structure, so that the two first edge magnet portions and the two second edge magnet portions enclose the accommodating space; The two voice coils are arranged at intervals along the second direction, the common magnetic portion extends in the same direction as the first direction and is located between two adjacent voice coils, and two ends of the common magnetic portion are respectively connected to the two second side magnetic portions; 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 first side magnetic part includes a first side magnet and a first side magnetic conductive plate which are stacked, the first side magnet is connected to the magnetic conductive yoke, and the second side magnetic part includes a second side magnet and a second side magnetic conductive plate which are stacked, the second side magnet is connected to the magnetic conductive yoke; The common magnetic part includes a common magnet and a common magnetic conductive plate which are stacked, the common magnet is connected to the magnetic conductive yoke, two ends of the common magnet are respectively connected to the two second side magnets, and two ends of the common magnetic conductive plate are respectively connected to the two second side magnetic conductive plates; The first side magnetic conductive plate and the second side magnetic conductive plate are integrally formed to form a closed integral ring structure, and the adjacent first side magnets and the second side magnets are connected end to end to form a closed ring structure.

5. The sound generating device according to claim 4, characterized in that: The common magnet and the two second side magnets are an integrally formed structure; And / or, the common magnetic conductive plate and the two second side magnetic conductive plates are an integrally formed structure; And / or, the first side magnetic conductive plate and the second side magnetic conductive plate are integrally formed with the housing; And / or, each of the central magnetic parts comprises a central magnet and a central magnetic conductive plate which are stacked, and the central magnet is connected to the magnetic conductive yoke; And / or, the two central magnetic parts are symmetrically arranged with the common magnetic part as the symmetry axis; And / or, the two voice coils are symmetrically arranged with the common magnetic part as a symmetry axis.

6. The sound generating device according to claim 3, characterized in that: Each of the second side magnetic parts includes a main body and a protruding part protruding from the main body toward the shell, the protruding part is connected to the shell, and a side of the main body facing away from the protruding part is connected to the common magnetic part; Wherein, from the protruding portion to the common magnetic portion, the cross-sectional area of ​​the main body portion along the second direction gradually increases.

7. The sound generating device according to any one of claims 1 to 6, characterized in that: The edge magnetic part is provided with an avoidance notch corresponding to the corner of the shell; The vibration system further includes a frame and a centering support plate, wherein the frame includes a main body and a support leg connected to the periphery of the main body, the main body is connected to the diaphragm assembly and to the voice coil, the centering support plate is connected to the housing and is arranged corresponding to the avoidance notch, the support leg extends to the avoidance notch and is connected to the centering support plate; Wherein, the lead wire of the voice coil extends along the support leg and is electrically connected to the centering support plate.

8. The sound generating device according to claim 7, characterized in that: The body portion encloses a through hole, and a side of the body portion facing the through hole extends toward the voice coil to form a first protrusion, and the first protrusion is connected to the voice coil; And / or, the support legs include four, each of the support legs includes a straight section connected to the main body and an extension section extending from the straight section toward the avoidance notch, and the extension section is connected to the centering support sheet; And / or, the centering support includes four, each of which is arranged corresponding to one of the avoidance gaps, each of which includes an external connection portion, an internal connection portion, and an elastic arm portion connecting the external connection portion and the internal connection portion, the external connection portion is connected to the housing, the internal connection portion is connected to the support leg portion, and is provided with an internal pad electrically connected to the lead of the voice coil; And / or, the magnetic yoke is provided with a relief area corresponding to the relief gap, and the relief area is a recessed groove or a through hole.

9. The sound generating device according to claim 7, characterized in that: The diaphragm assembly includes a diaphragm and a vibration plate, the diaphragm includes an inner ring portion, a folded ring portion and a fixed portion connected in sequence from the inside to the outside, the inner ring portion is connected to the vibration plate, the fixed portion is connected to the housing, and the body portion is connected to the vibration plate; Wherein, the vibration plate is provided with a second protrusion extending toward the voice coil, and the second protrusion is connected to the voice coil; and / or, one end of the fixing portion away from the folding ring portion is bent and extended toward the outer shell to form a bent portion, and the bent portion is connected to the outer wall of the outer shell.

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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