Sound production device and electronic device

Abstract

The application discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction. The sound production device is characterized in that the magnetic circuit system of the sound production device comprises a center magnetic part and a magnetic gap formed by the center magnetic part, a side magnetic part and a common magnetic part. The vibration system comprises a vibrating diaphragm assembly, a conductive branch, at least two voice coils and four centering branches. The multiple voice coils are arranged side by side. In the direction in which the multiple voice coils are arranged side by side, the voice coils at both ends are connected to the corresponding two centering branches, respectively. The lead portions of the two adjacent voice coils are electrically connected to the conductive branch, respectively, so that the two adjacent voice coils are connected in series. The conductive branch comprises a connecting portion and two solder pad portions. The projection of the connecting portion in the vibration direction of the vibration system is located at the middle position of the common magnetic part. The sound production device can increase the volume of the magnet setting in the magnetic circuit system, improve the BL value of the product, and further improve the loudness and sensitivity of the sound production device by arranging the conductive branch between the two adjacent voice coils.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic transduction technology, and in particular to a sound-generating device and an electronic device using the sound-generating device. Background Technology

[0002] In recent years, with the rapid development of consumer electronics, electronic devices such as smartphones and VR devices have gained consumer acceptance and widespread application. 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 satisfy consumers' needs for product performance.

[0003] Sound-generating devices are crucial electroacoustic transducers in consumer electronics, widely used as speakers, earpieces, and headphones. As electronic product performance improves, improvements in the acoustic performance of sound-generating devices are inevitable. To achieve better acoustic performance, sound-generating devices often require larger magnetic circuit systems with stronger magnetic fields.

[0004] In related technologies, multiple voice coils are typically used to improve the acoustic performance of the sound-generating device. A centering support structure is employed, with the centering supports placed at the four corners of the sound-generating device and on its long axis to connect the four corners of the voice coils. This occupies space in the magnetic circuit system, limiting the size of the side magnets and preventing them from being enlarged. In particular, the side magnets occupy a large amount of space on their long axis, thereby reducing the magnetic field strength of the magnetic circuit system, lowering the BL value, and affecting the acoustic performance of the sound-generating device. Summary of the Invention

[0005] The main objective of this invention is to provide a sound-generating device and an electronic device, which aims to provide a sound-generating device that effectively increases the magnetic field strength of a magnetic circuit system. This sound-generating device can increase the volume of the magnet in the magnetic circuit system, effectively improve the magnetic field strength, increase the BL value of the product, and thus improve the loudness and sensitivity of the sound-generating device.

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

[0007] shell;

[0008] A magnetic circuit system connected to the outer casing, the magnetic circuit system including a magnetic yoke and side magnetic portions, a common magnetic portion, and a central magnetic portion disposed on the magnetic yoke. The central magnetic portion is disposed on opposite sides of the common magnetic portion. The side magnetic portions are arranged around the outside of the common magnetic portion and the central magnetic portion. Each central magnetic portion, together with the side magnetic portions and the common magnetic portion surrounding it, forms a magnetic gap.

[0009] A vibration system includes a diaphragm assembly, conductive supports, at least two voice coils, and four centering supports. The periphery of the diaphragm assembly is connected to the housing and is disposed opposite to the magnetic circuit system. The four centering supports are respectively disposed at the four corners of the housing. A plurality of 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 a magnetic gap. Along the direction of the parallel arrangement of the plurality of voice coils, the voice coils at both ends are respectively connected to the corresponding two centering supports. The conductive supports are disposed on the side of the diaphragm assembly facing the magnetic circuit system and are located between two adjacent voice coils. The lead portions of two adjacent voice coils are electrically connected to the conductive supports, so that the two adjacent voice coils are connected in series.

[0010] The number of conductive support pieces is the same as the number of common magnetic parts. Each conductive support piece includes a connecting part and two pads located at both ends of the connecting part. The two pads are located on opposite sides of the connecting part. The connecting part extends along the length direction of the common magnetic part, and the projection of each connecting part along the vibration direction of the vibration system is located at the middle position of each common magnetic part.

[0011] In one embodiment, the outer casing has two long axis sides and two short axis sides connected end to end, and the junction of the long axis sides and the short axis sides forms the corner.

[0012] The multiple voice coils are arranged at intervals along the extension direction of the long axis, and the extension direction of the common magnet is consistent with the extension direction of the short axis and is located between two adjacent voice coils.

[0013] In one embodiment, the connecting portion along the central axis of the short axis coincides with the central axis of the common magnetic portion along the short axis.

[0014] And / or, the connecting portion coincides with the central axis of the long axis of the voice coil along the central axis of the long axis side.

[0015] In one embodiment, the edge magnetic portion is provided with a clearance notch connecting the magnetic gap for each corner portion, each centering support is provided with a clearance notch, and one end of each centering support is connected to the corner portion, and the other end of each centering support extends into the magnetic gap and is connected to the voice coil.

[0016] In one embodiment, the edge magnetic portion includes a stacked edge magnet and an edge washer, the edge magnet being connected to the magnetic yoke;

[0017] The side magnet includes a first side magnet extending along the long axis and a second side magnet extending along the short axis, with the clearance gap formed between adjacent first side magnets and second side magnets;

[0018] The edge washer includes a first edge washer extending along the long axis and a second edge washer extending along the short axis, wherein the first edge washer corresponds to the first edge magnet and the second edge washer corresponds to the second edge magnet.

[0019] In one embodiment, the side magnet includes two first side magnets, each of which is disposed corresponding to one of the long axis sides;

[0020] Alternatively, the number of voice coils is N, where N≥2, and the side magnets include 2N first side magnets, with each N first side magnets corresponding to one of the major axis sides and arranged at intervals along the extension direction of the major axis side so that a gap is formed between two adjacent first side magnets. The gap is opposite to the common magnetic part, and the width of the gap along the extension direction of the major axis side is smaller than the width of the common magnetic part along the extension direction of the major axis side.

[0021] In one embodiment, the side magnet includes a second side magnet disposed corresponding to each of the short axis sides, and each second side magnet and the common magnetic part are located on opposite sides of the central magnetic part; or, the side magnet includes a plurality of second side magnets disposed corresponding to each of the short axis sides, and the plurality of second side magnets disposed corresponding to each of the short axis sides are arranged adjacent to each other along the extension direction of the short axis side.

[0022] And / or, the avoidance gap is formed between adjacent first and second sidewalls;

[0023] And / or, the first and second side washers are integrally injection molded with the outer shell;

[0024] And / or, the first edge washer corresponding to each of the major axis edges includes one or more;

[0025] And / or, the second side washer corresponding to each of the short axis sides includes one or more.

[0026] In one embodiment, the common magnetic part has an avoidance structure corresponding to the conductive support sheet;

[0027] Wherein, the avoidance structure is a groove formed by the common magnetic part being recessed toward the magnetic yoke; or, the avoidance structure is a through hole structure that passes through the common magnetic part.

[0028] In one embodiment, the common magnetic part includes a common magnet and a common washer stacked together, and the common magnet is connected to the magnetic yoke;

[0029] The avoidance structure includes a first avoidance area and a second avoidance area that are connected. The first avoidance area is a groove formed by the common washer recessing towards the common magnet. The second avoidance area is a through-hole structure or notch that sequentially passes through the common washer and the common magnet.

[0030] The connection portion corresponds to the first clearance area, and each of the solder pad portions corresponds to a second clearance area.

[0031] In one embodiment, the edge magnetic portion includes a stacked edge magnet and an edge washer, the edge magnet being connected to the magnetic yoke;

[0032] The shared washer and the edge washer are integrally formed.

[0033] In one embodiment, the diaphragm assembly includes a diaphragm and a vibrating plate. The diaphragm includes an inner fixing part, a folded ring part, and an outer fixing part connected sequentially from the inside to the outside. The inner fixing part is connected to the vibrating plate, and the outer fixing part is connected to the outer shell. The conductive support is disposed on the vibrating plate.

[0034] In one embodiment, the conductive support is an FPCB pad attached to the vibrating plate;

[0035] Alternatively, the conductive support sheet may be a conductive coating attached to the vibrating plate;

[0036] Alternatively, the conductive support is a wire connected to the vibrating plate, and the wire and the two voice coils are made of a single wire.

[0037] In one embodiment, there are two voice coils, one conductive support plate located between the two voice coils, and one common magnet located between the two central magnets. The conductive support plate is disposed opposite to the common magnet along the vibration direction of the vibration system.

[0038] The present invention also proposes an electronic device, which includes the sound-generating device described above.

[0039] The sound-generating device of this invention houses a magnetic circuit system and a vibration system within a housing. The magnetic circuit system is configured as a magnetic yoke and includes a side magnetic portion, a common magnetic portion, and a central magnetic portion located on the yoke. A central magnetic portion is provided on each opposite side of the common magnetic portion, and the side magnetic portions are arranged around the outside of the common and central magnetic portions, such that each central magnetic portion, together with the surrounding side magnetic portions and common magnetic portions, forms a magnetic gap. The vibration system comprises a diaphragm assembly, conductive supports, at least two voice coils, and four centering supports. The periphery of the diaphragm assembly is connected to the housing and positioned opposite the magnetic circuit system. The device is configured with four centering supports at the four corners of the housing, and multiple voice coils arranged side-by-side. One end of each voice coil is connected to the diaphragm assembly, and the other end is suspended in a magnetic gap. Along the direction of the parallel arrangement of the voice coils, the voice coils at both ends are connected to their corresponding two centering supports. Conductive supports are located on the side of the diaphragm assembly facing the magnetic circuit system, between adjacent voice coils, so that the leads of adjacent voice coils are electrically connected to the conductive supports, thus connecting adjacent voice coils in series. Current is then passed through the multiple voice coils, causing multiple voice coils to... The voice coils are connected in series via conductive supports, vibrating within the magnetic fields of multiple magnetic gaps formed by the magnetic circuit system, thus driving the diaphragm assembly to vibrate and produce sound. Simultaneously, four centering supports, in conjunction with the conductive supports, center the multiple voice coils, preventing polarization or oscillation during vibration. The conductive supports are positioned on the side of the diaphragm assembly facing the magnetic circuit system, between adjacent voice coils, with the number of conductive supports matching the number of shared magnetic components. Along the vibration direction of the system, the conductive supports are arranged one-to-one with the shared magnetic components, and each conductive support is connected... The connector and two solder pads located at both ends of the connector are positioned on opposite sides of the connector. The connector extends along the length of the common magnetic part, and the projection of each connector along the vibration direction of the vibration system is located in the middle of each common magnetic part. This not only allows the leads of two adjacent voice coils to be electrically connected to the conductive support plates, thus enabling the two adjacent voice coils to be connected in series, but also eliminates the need for a centering support plate on the long axis of the side magnetic part. This further increases the volume of the side magnetic part, effectively improves the magnetic field strength, increases the BL value of the product, and thus improves the loudness and sensitivity of the sound-generating device. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0041] Figure 1A schematic diagram of the structure of an embodiment of the sound-generating device provided by the present invention;

[0042] Figure 2 A schematic diagram of the structure of an embodiment of the sound-generating device provided by the present invention from another perspective;

[0043] Figure 3 An exploded view of an embodiment of the sound-generating device provided by the present invention;

[0044] Figure 4 This is a cross-sectional view of the sound-generating device along its long axis in one embodiment of the present invention;

[0045] Figure 5 This is a cross-sectional view of the sound-generating device along the short axis in one embodiment of the present invention;

[0046] Figure 6 This is a cross-sectional schematic diagram of the sound-generating device along the short axis direction in one embodiment of the present invention.

[0047] Figure 7 This is a partial structural schematic diagram of an embodiment of the magnetic circuit system provided by the present invention;

[0048] Figure 8 This is a schematic diagram of the connection between the vibrating plate, the voice coil, and the centering support in one embodiment of the present invention;

[0049] Figure 9 This is a schematic diagram of the connection between the vibrating plate, the voice coil, and the centering support plate in one embodiment of the present invention from another perspective;

[0050] Figure 10 This is a schematic diagram of the structure connecting the outer shell with the side washer and the common washer in one embodiment of the present invention.

[0051] Explanation of icon numbers:

[0052] 100. Sound-generating device; 1. Outer shell; 11. Long axis side; 12. Short axis side; 13. Corner; 2. Magnetic circuit system; 21. Magnetic yoke; 22. Central magnetic part; 221. Central magnet; 222. Central washer; 23. Side magnetic part; 231. Side magnet; 2311. First side magnet; 2312. Second side magnet; 2313. Gap; 232. Side washer; 2321. First side washer; 2322. Second side washer; 233. Clearance notch; 24. Common magnetic part; 241. Common magnet ; 242. Shared washer; 243. Avoidance structure; 2431. First avoidance area; 2432. Second avoidance area; 25. Magnetic gap; 3. Vibration system; 31. Diaphragm assembly; 311. Diaphragm; 3111. Inner fixing part; 3112. Folded ring part; 3113. Outer fixing part; 312. Vibrating plate; 32. Voice coil; 33. Centering support; 331. First fixing part; 332. Second fixing part; 333. Elastic arm; 34. Conductive support; 341. Connecting part; 342. Solder pad part.

[0053] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0055] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0056] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0057] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0058] This invention proposes a sound-generating device 100. It is understood that the sound-generating device 100 can be applied to electronic devices, such as smartwatches, mobile phones, tablets, computers, headphones, etc., and is not limited thereto.

[0059] Please refer to the reference. Figures 1 to 10 As shown, in this embodiment of the invention, the sound-generating device 100 includes a housing 1, a magnetic circuit system 2, and a vibration system 3. The magnetic circuit system 2 is connected to the housing 1 and includes a magnetic yoke 21, a side magnetic portion 23, a common magnetic portion 24, and a central magnetic portion 22 disposed on the magnetic yoke 21. The common magnetic portion 24 has a central magnetic portion 22 disposed on opposite sides. The side magnetic portions 23 are arranged around the common magnetic portion 24 and the central magnetic portion 22. Each central magnetic portion 22, together with the side magnetic portions 23 and the common magnetic portion 24 surrounding it, forms a magnetic gap 25. The vibration system 3 includes a diaphragm assembly 31, conductive support plates 34, at least two voice coils 32, and four centering support plates 33. The periphery of the diaphragm assembly 31 is connected to the housing 1 and is disposed opposite to the magnetic circuit system 2. The four centering support plates 33 are respectively disposed at the four corners 13 of the housing 1. The multiple voice coils 32 are arranged side by side, and one end of each voice coil 32 is connected to the diaphragm assembly 31. In the diaphragm assembly 31, the other end of each voice coil 32 is suspended in a magnetic gap 25. Along the direction in which multiple voice coils 32 are arranged side by side, the voice coils 32 at both ends are respectively connected to two corresponding centering supports 33. Conductive supports 34 are disposed on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and are located between two adjacent voice coils 32. The lead portions of two adjacent voice coils 32 are electrically connected to the conductive supports 34 respectively, so that the two adjacent voice coils 32 are connected in series. The number of conductive supports 34 is the same as the number of common magnetic parts 24. Each conductive support 34 includes a connecting portion 341 and two pad portions 342 disposed at both ends of the connecting portion 341. The two pad portions 342 are located on opposite sides of the connecting portion 341. The connecting portion 341 extends along the length direction of the common magnetic part 24, and the projection of each connecting portion 341 along the vibration direction of the vibration system 3 is located at the middle position of each common magnetic part 24.

[0060] In this embodiment, the sound-generating device 100 is a miniature loudspeaker. It should be noted that the magnetic circuit system 2 and the diaphragm assembly 31 of the vibration system 3 of the sound-generating device 100 are arranged opposite to each other. Of course, in other embodiments, the diaphragm assembly 31 of the vibration system 3 may also be disposed on the outer periphery of the magnetic circuit system 2; this is not a limitation.

[0061] Optionally, the magnetic circuit system 2 can be arranged in a square shape. For example, the magnetic circuit system 2 may include a central magnetic part 22 and a side magnetic part 23, both of which are square in structure. The vibration system 3 may optionally be arranged in a square shape. It is understood that the periphery of the diaphragm assembly 31 of the vibration system 3 may be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 3 may be respectively mounted on the outer shell or the module housing, etc., which are not limited here.

[0062] To better assemble the magnetic circuit system 2 and vibration system 3 of the sound-generating device 100, in one embodiment, as... Figures 1 to 6 , Figure 10 As shown, the sound-generating device 100 also includes a housing 1, a magnetic circuit system 2 and a vibration system 3 housed within the housing 1.

[0063] In this embodiment, the outer shell 1 is used to install, fix, and support components such as the magnetic circuit system 2 and the vibration system 3; that is, the outer shell 1 provides a mounting base for components such as the magnetic circuit system 2 and the vibration system 3. It is understood that the outer shell 1 can be a single integral structure or formed by the cooperation of multiple separate structures, and no limitation is made here.

[0064] Optionally, the outer shell 1 can be a frame or frame structure, that is, the outer shell 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 outer shell 1, so that the magnetic circuit system 2, the outer shell 1 and the diaphragm 31 of the vibration system 3 enclose and form a vibration cavity.

[0065] Specifically, the outer casing 1 is a rectangular frame, with a receiving cavity formed in the middle. Along its central axis, the outer casing 1 has a first side and a second side facing each other. The central axis of the outer casing 1 is the vibration direction of the sound-generating device 100. The magnetic circuit system 2 is connected to the first side of the outer casing 1, and the vibration system 3 is connected to the second side of the outer casing 1. Thus, the magnetic circuit system 2 and the vibration system 3 are arranged opposite to each other and can drive the vibration system 3 to vibrate and generate sound when the vibration system 3 is energized.

[0066] In this embodiment, the periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the outer shell 1 and is positioned opposite to and spaced apart from the magnetic circuit system 2; or, the periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the outer shell 1, and the center of the diaphragm assembly 31 is connected to the central magnetic part 22 of the magnetic circuit system 2 and is positioned opposite to the magnetic circuit system 2; or, the periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the outer shell 1, and the center of the diaphragm assembly 31 is provided with a through hole structure for the magnetic circuit system 2 to pass through. In this case, the center of the diaphragm assembly 31 is connected to the side magnetic part 23 of the magnetic circuit system 2 or the support member on the outer shell 1, which is not limited here.

[0067] Understandably, the sound-generating device 100 is used in electronic devices, meaning it can be mounted on the electronic device via the housing 1. It should be noted that the housing 1 of the sound-generating device 100 can be a separate housing or enclosure structure from the electronic device. In this case, the housing 1 integrates the magnetic circuit system 2 and vibration system 3 of the sound-generating device 100 into a single structure, facilitating assembly and disassembly. Alternatively, the housing 1 of the sound-generating device 100 can be integrally molded with the housing or enclosure structure of the electronic device, effectively improving structural strength and sealing performance while reducing the size of the electronic device.

[0068] In this embodiment, the housing 1 is used to house structures such as the fixed vibration system 3 and the magnetic circuit system 2, so that the sound generating device 100 can be used as an independent component in electronic devices.

[0069] Understandably, by setting the magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic part 22, a side magnetic part 23 and a common magnetic part 24 provided on the magnetic yoke 21, the magnetic circuit system 2 can be connected to the outer shell 1 through the magnetic yoke 21; or, the magnetic circuit system 2 can be connected to the outer shell 1 through the side magnetic part 23, which is not limited here.

[0070] In this embodiment, by setting multiple central magnetic parts 22 and setting a common magnetic part 24 between two adjacent central magnetic parts 22, that is, central magnetic parts 22 are respectively provided on opposite sides of the common magnetic part 24, and side magnetic parts 23 are arranged around the outside of the common magnetic part 24 and the central magnetic parts 22, so that each central magnetic part 22, together with the side magnetic parts 23 and the common magnetic part 24 arranged around it, forms a magnetic gap 25. That is, two adjacent magnetic gaps 25 are located on opposite sides of the common magnetic part 24, and each magnetic gap 25 is arranged around a central magnetic part 22. In this way, the diaphragm assembly 31 of the vibration system 3 is connected to the outer shell 1, thereby connecting one end of multiple voice coils 32 to the diaphragm assembly 31, and the other end of multiple voice coils 32 is respectively arranged corresponding to multiple magnetic gaps 25.

[0071] Optionally, multiple voice coils 32 are arranged side by side. To allow current to flow through the multiple voice coils 32 and to be electrically connected to an external circuit, in one embodiment, the vibration system 3 further includes a conductive support 34 and a centering support 33. The conductive support 34 is disposed on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and located between two adjacent voice coils 32. The leads of two adjacent voice coils 32 are electrically connected to the conductive support 34, so that the two adjacent voice coils 32 are arranged in series. Along the direction in which the multiple voice coils 32 are arranged side by side, the voice coils 32 at both ends are respectively connected to the corresponding two centering supports 33.

[0072] Understandably, by placing the conductive support plate 34 on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and between two adjacent voice coils 32, the leads of the two adjacent voice coils 32 are electrically connected to the conductive support plate 3. This not only achieves a series connection between the two adjacent voice coils 32, but also eliminates the need for a centering support plate 33 on the long axis of the side magnetic part 23. This further increases the volume of the side magnetic part 23, effectively improving the magnetic field strength, increasing the product's BL value, and thus improving the loudness and sensitivity of the sound-generating device 100. Furthermore, by using four centering support plates 33 in conjunction with the conductive support plate 34 to center the multiple voice coils 32, polarization or oscillation of the voice coils 32 during vibration is prevented, further improving the acoustic performance of the sound-generating device 100.

[0073] In this embodiment, as Figure 3 , Figure 8 and Figure 9 As shown, the centering support 33 includes a first fixing part 331, a second fixing part 332, and an elastic arm 333 connected between the first fixing part 331 and the second fixing part 332. The first fixing part 331 is connected to the outer shell 1, and the second fixing part 332 is connected to the voice coil 32 and electrically connected to the lead wire of the voice coil 32.

[0074] In one embodiment, each conductive support 34 includes a connecting portion 341 and two pad portions 342 disposed at both ends of the connecting portion 341. The two pad portions 342 are located on opposite sides of the connecting portion 341. The connecting portion 341 extends along the length direction of the common magnetic portion 24, and the projection of each connecting portion 341 along the vibration direction of the vibration system 3 is located at the middle position of each common magnetic portion 24.

[0075] In this embodiment, as Figure 3 and Figure 9 As shown, the connecting portion 341 and the two pad portions 342 of the conductive support piece 34 can be integrally formed. The two pad portions 342 are located at both ends of the connecting portion 341, and are situated on opposite sides of the connecting portion 341. The leads of two adjacent voice coils 32 are respectively connected to the two pad portions 342. Optionally, the connecting portion 341 extends along the length direction of the common magnetic portion 24.

[0076] Optionally, the connecting portion 341 coincides with the central axis of the common magnet portion 24 along the short axis side 12. Optionally, the connecting portion 341 coincides with the central axis of the voice coil 32 along the long axis side 11. It can be understood that this ensures that the conductive support piece 34 is located in the middle of the common magnet portion 24, thereby achieving centering and balancing of the two adjacent voice coils 32.

[0077] In one implementation, such as Figure 3 , Figure 5 , Figure 7 , Figure 9 and Figure 10 As shown, the projection of the connecting portion 341 of the conductive support 34 along the vibration direction of the vibration system 3 is located at the center of the common magnetic part 24. It can be understood that the conductive support 34 not only enables the series connection and conduction of two adjacent voice coils 32, but also serves to center the two adjacent voice coils 32, ensuring that the wiring distance between the two adjacent voice coils 32 and the conductive support 34 remains essentially consistent. This ensures that the tensile force on the two adjacent voice coils 32 is essentially consistent, further preventing problems such as polarization of the voice coils 32 during vibration.

[0078] Understandably, the centering support 33 connects the multiple voice coils 32 at both ends along the side-by-side arrangement direction to the external circuit, enabling electrical connection and conduction. The multiple voice coils 32 are also connected in series via conductive support 34, allowing current to flow through them. Optionally, multiple conductive support 34s are included. In this embodiment, the number of voice coils 32 is N, where N≥2, and the number of conductive support 34 is N-1. In this embodiment, the centering support 33 can be located at the bottom of the voice coils 32, with four centering support 33s located at the four corners of the sound-generating device 100.

[0079] Of course, in other embodiments, in order to realize the electrical connection between the voice coil 32 and the external circuit, the vibration system 3 also includes a connector or frame. One end of the connector or frame is connected to the voice coil 32 and is connected to the lead wire of the voice coil 32 for conduction. The other end of the connector or frame is connected to the outer shell 1. This is not limited here.

[0080] Optionally, when the number of voice coils 32 is N, the number of central magnets 22 is N, and the number of common magnets 24 is N-1.

[0081] In one implementation, such as Figure 3 , Figure 4 , Figure 7 and Figure 9As shown, there can be two voice coils 32, one conductive support 34 located between the two voice coils 32, four centering support 33, and one common magnetic part 24 located between the two central magnetic parts 22. The conductive support 34 is arranged opposite to the common magnetic part 24 along the vibration direction of the vibration system 3.

[0082] In this embodiment, by setting two central magnetic parts 22, and setting each central magnetic part 22 as a central magnet 221 and a central washer 222 stacked together, and setting the side magnetic parts 23 and the shared magnetic parts 24 around or outside each central magnetic part 22, the two central magnetic parts 22 share a shared magnetic part 24 and form two magnetic gaps 25, so that the two voice coils 32 can make full use of the magnetic field of the central magnetic parts 22, improve the magnetic energy utilization rate of the central magnetic parts 22, thereby improving the loudness and sensitivity of the sound generating device 100, and improving product performance. Furthermore, four centering supports 33 are respectively disposed at the four corners of the outer casing 1, and conductive supports 34 are disposed on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and located between two adjacent voice coils 32. In the vibration direction along the vibration system 3, the conductive supports 34 are arranged one-to-one with the common magnetic part 24. This not only allows the lead parts of the two adjacent voice coils 32 to be electrically connected to the conductive supports 34 respectively, realizing the series arrangement of the two adjacent voice coils 32, but also eliminates the need to set the centering supports 33 on the long axis of the side magnetic part 23, thereby further increasing the volume of the side magnetic part 23, effectively improving the magnetic field strength, increasing the BL value of the product, and thus improving the loudness and sensitivity of the sound generating device 100.

[0083] Optionally, the magnetic yoke 21 of the magnetic circuit system 2 is a flat plate structure, and the common magnetic part 24, the central magnetic part 22 and the side magnetic part 23 are all strip-shaped and fixed to the side of the magnetic yoke 21 facing the vibration system 3.

[0084] In this embodiment, the outer periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the second side of the outer shell 1; two voice coils 32 are arranged in a row in the receiving cavity, and the first end of each voice coil 32 is connected to the diaphragm assembly 31, and the other end is arranged corresponding to the magnetic circuit system 2. Thus, when energized, it is driven by the magnetic circuit system 2, thereby causing the diaphragm assembly 31 to vibrate and produce sound. Four centering supports 33 are respectively arranged at the four corners 13 of the outer shell 1, and each centering support 33 is connected between the corner 13 of the first side of the outer shell 1 and the corresponding voice coil 32, thus reducing the polarization of the two voice coils 32 in the non-vibration direction. Meanwhile, the conductive support plate 34 is located between the two voice coils 32 and is specifically disposed in the diaphragm assembly 31. The conductive support plate 34 is electrically connected to the lead portion of the two voice coils 32 respectively. This not only realizes the series connection of the two voice coils 32, but also uses the conductive support plate 34 to center the two adjacent voice coils 32. That is, the conductive support plate 34 and the four centering support plates 33 at the four corners 13 cooperate to center the voice coils 32, preventing the voice coils 32 from being polarized or oscillating during vibration, thereby improving the sound quality of the sound generating device 100.

[0085] In one embodiment, the diaphragm assembly 31 has two long axis sides and two short axis sides connected end to end, and two central magnets 22 are arranged at intervals along the direction of the long axis sides.

[0086] In this embodiment, as Figure 1 , Figure 3 , Figure 8 and Figure 9 As shown, the diaphragm assembly 31 may optionally be rectangular, meaning that the diaphragm assembly 31 has two long axis sides and two short axis sides connected end to end. Optionally, the two central magnets 22 are arranged at intervals along the direction of the long axis sides, that is, the two magnetic gaps 25 of the magnetic circuit system 2 are arranged at intervals along the direction of the long axis sides, so that the two voice coils 32 are arranged at intervals along the direction of the long axis sides.

[0087] The sound-generating device 100 of the present invention houses a magnetic circuit system 2 and a vibration system 3 within a housing 1. The magnetic circuit system 2 is configured as a magnetic yoke 21 and a side magnetic portion 23, a common magnetic portion 24, and a central magnetic portion 22 disposed on the magnetic yoke 21. A central magnetic portion 22 is provided on each opposite side of the common magnetic portion 24, and the side magnetic portions 23 are arranged around the outside of the common magnetic portion 24 and the central magnetic portion 22, such that each central magnetic portion 22, together with the side magnetic portions 23 and the common magnetic portion 24 surrounding it, forms a magnetic gap 25. The vibration system 3 is configured as a diaphragm assembly 31, conductive support plates 34, at least two voice coils 32, and four centering support plates 33, such that the periphery of the diaphragm assembly 31 is connected to the outer... The housing 1 is positioned opposite the magnetic circuit system 2, with four centering supports 33 located at the four corners 13 of the housing 1. Multiple voice coils 32 are arranged side-by-side, with one end of each voice coil 32 connected to the diaphragm assembly 31 and the other end suspended within a magnetic gap 25. Along the direction of the parallel arrangement of the voice coils 32, the voice coils at both ends are connected to their corresponding two centering supports 33. Conductive supports 34 are positioned on the side of the diaphragm assembly 31 facing the magnetic circuit system 2, between adjacent voice coils 32, so that the leads of adjacent voice coils 32 are electrically connected to the conductive supports 34, thus connecting adjacent voice coils 32 in series. Current is passed through multiple voice coils 32, causing them to be connected in series via conductive supports 34. These voice coils vibrate within the magnetic fields of the multiple magnetic gaps 25 formed by the magnetic circuit system 2, driving the diaphragm assembly 31 to vibrate and produce sound. Simultaneously, four centering supports 33, in cooperation with the conductive supports 34, center the voice coils 32, preventing polarization or oscillation during vibration. Furthermore, the conductive supports 34 are positioned on the side of the diaphragm assembly 31 facing the magnetic circuit system 2, between adjacent voice coils 32, and the number of conductive supports 34 is the same as the number of shared magnetic parts 24. Along the vibration direction of the vibration system 3, the conductive supports 34 and the shared magnetic parts 24 are aligned. Each conductive support 34 is arranged in a one-to-one correspondence, and each conductive support 34 is configured as a connecting part 341 and two solder pads 342 located at both ends of the connecting part 341. The two solder pads 342 are located on opposite sides of the connecting part 341, and the connecting part 341 extends along the length direction of the common magnetic part 24. The projection of each connecting part 341 along the vibration direction of the vibration system 3 is located at the middle position of each common magnetic part 24. This not only realizes the series connection of two adjacent voice coils 32, but also eliminates the need to set a centering support 33 on the long axis of the side magnetic part 23, thereby further increasing the volume of the side magnetic part 23, effectively improving the magnetic field strength, increasing the BL value of the product, and thus improving the loudness and sensitivity of the sound generating device 100.

[0088] In one embodiment, the housing 1 has two long axis sides 11 and two short axis sides 12 connected end to end, and the connection between the long axis sides 11 and the short axis sides 12 forms a corner 13; a plurality of voice coils 32 are arranged at intervals along the extension direction of the long axis sides 11, and the extension direction of the common magnet 24 is consistent with the extension direction of the short axis sides 12 and is located between two adjacent voice coils 32.

[0089] In this embodiment, as Figure 3 and Figure 10 As shown, the housing 1 can be a rectangular frame structure, and multiple voice coils 32 can be arranged at intervals along the extension direction of the long axis side 11 of the housing 1. That is, multiple central magnets 22 are arranged at intervals along the extension direction of the long axis side 11 of the housing 1. At this time, a common magnet 24 is provided between two adjacent central magnets 22. That is, the extension direction of the common magnet 24 is consistent with the extension direction of the short axis side 12 and is located between two adjacent voice coils 32.

[0090] Understandably, the outer casing 1 is a rectangular frame, thus forming a rectangular structure for the sound-generating device 100. Of course, in other embodiments, the sound-generating device 100 may also be formed into other shapes, such as a square or other polygons, which are not limited here.

[0091] To facilitate the installation of the centering support 33 and avoid interference between the centering support 33 and the side magnet 23, in one embodiment, the side magnet 23 is provided with a clearance notch 233 corresponding to each corner 13, which is connected to the magnetic gap 25. Each centering support 33 is provided with a clearance notch 233, and one end of each centering support 33 is connected to the corner 13, while the other end of each centering support 33 extends into the magnetic gap 25 and is connected to the voice coil 32.

[0092] In this embodiment, as Figure 3 and Figure 7 As shown, by providing a clearance notch 233 on the side magnetic part 23 that connects to the magnetic gap 25, the clearance notch 233 can be conveniently used to provide clearance space and vibration space for the centering support 33. It can be understood that the side magnetic part 23 is provided with a clearance notch 233 for each corner part 13, so that each centering support 33 is provided with a clearance notch 233, and one end of each centering support 33 is connected to the corner part 13, and the other end of each centering support 33 extends into the magnetic gap 25 and is connected to the voice coil 32.

[0093] Optionally, the side magnetic part 23 includes a plurality of side magnetic parts 23, which are arranged around the outside of the central magnetic part 22 and the common magnetic part 24, and adjacent side magnetic parts 23 are spaced apart to form a gap, and at this time, the gap corresponding to the corner 13 of the outer shell 1 forms an avoidance notch 233.

[0094] In this embodiment, as Figure 3 and Figure 7As shown, the plurality of side magnetic parts 23 include side magnetic parts 23 extending along the long axis side 11 and side magnetic parts 23 extending along the short axis side 12. At this time, adjacent side magnetic parts 23 are spaced apart to form a clearance notch 233 for the corresponding corner part 13, which is not limited here.

[0095] Understandably, the side magnetic portion 23 may optionally be arranged in the form of a rectangular frame. The side magnetic portion 23 has two long sides and two short sides. The two central magnetic portions 22 are spaced apart along the direction of the long sides. The first part of the side magnetic portion 23 consists of the two short sides, and the second part of the side magnetic portion 23 consists of the two long sides. The common magnetic portion 24 is located between the two short sides, parallel to the short sides, and perpendicular to the long sides, so that the side magnetic portion 23 is divided into two rectangular cavities by the common magnetic portion 24.

[0096] Optionally, each corner of the side magnetic part 23 is provided with a clearance notch 233, that is, a clearance notch 233 is provided between the long side and the short side. In this way, the clearance notch 233 at the corner of the side magnetic part 23 can be used to provide installation and clearance space for the centering support 33.

[0097] In one embodiment, the edge magnetic portion 23 includes a stacked edge magnet 231 and an edge washer 232, with the edge magnet 231 connected to the magnetic yoke 21. The edge magnet 231 and the edge washer 232 of the edge magnetic portion 23 surround the outer side of the central magnetic portion 22 and the common magnetic portion 24. It is understood that the clearance notch 233 may be formed by the edge magnet 231 and / or the edge washer 232 of the edge magnetic portion 23, and is not limited thereto.

[0098] Optionally, the side magnet 231 of the side magnet section 23 can be a permanent magnet. The side washer 232 can be a magnetic plate structure. It is understood that the side magnet 231 and the side washer 232 of the side magnet section 23 can be an integral structure or a separate structure, and there is no limitation here.

[0099] In this embodiment, as Figure 3 and Figure 7 As shown, the side magnet 231 includes a first side magnet 2311 extending along the long axis side 11 and a second side magnet 2312 extending along the short axis side 12. The side washer 232 includes a first side washer 2321 extending along the long axis side 11 and a second side washer 2322 extending along the short axis side 12. The first side washer 2321 corresponds to the first side magnet 2311, and the second side washer 2322 corresponds to the second side magnet 2312.

[0100] Optionally, a first gap is formed between adjacent first side magnets 2311 and second side magnets 2312, and a second gap is formed between adjacent first side washer 2321 and second side washer 2322. The first gap and the second gap are connected to form an avoidance gap 233. In this embodiment, the first gap between the first side magnet 2311 and the second side magnet 2312 of the side magnet 231 and the second gap between the first side washer 2321 and the second side washer 2322 of the side washer 232 are connected to each other and are provided at the corner 13 of the outer casing 1.

[0101] In one embodiment, the side magnet 231 includes two first side magnets 2311, each first side magnet 2311 being disposed corresponding to a major axis side 11. It is understood that the first side magnets 2311 may optionally be arranged in a strip shape and extend along the length direction of the major axis side 11. This simplifies the structural design of the side magnet portion 23 and makes assembly more convenient.

[0102] Optionally, the common magnetic part 24 is perpendicular to both the two first side magnets 2311 and corresponds to the center position of the two first side magnets 2311.

[0103] In another embodiment, the number of voice coils 32 can be N, where N≥2. The side magnets 231 include 2N first side magnets 2311, each N first side magnets 2311 corresponding to a major axis side 11 and arranged at intervals along the extension direction of the major axis side 11, so that a gap 2313 is formed between two adjacent first side magnets 2311. The gap 2313 is opposite to the common magnetic part 24, and the width of the gap 2313 along the extension direction of the major axis side 11 is smaller than the width of the common magnetic part 24 along the extension direction of the major axis side 11.

[0104] Understandably, each major axis side 11 corresponds to N first side magnets 2311, and the N first side magnets 2311 are arranged adjacently or spaced apart along the length direction of the major axis side 11. Optionally, each major axis side 11 corresponds to two first side magnets 2311, and the two first side magnets 2311 are arranged spaced apart along the extension direction of the major axis side 11, such that a gap 2313 is formed between the two first side magnets 2311. In this embodiment, the gap 2313 is opposite to the common magnetic part 24. Optionally, the width of the gap 2313 along the extension direction of the major axis side 11 is smaller than the width of the common magnetic part 24 along the extension direction of the major axis side 11. This arrangement can ensure smooth airflow and reduce the space reserved for the original centering support plate 33 in the side magnetic part 23, thereby increasing the volume of the side magnets 231 in the side magnetic part 23, thereby increasing the magnetic field strength, improving the product BL value, and thus improving acoustic performance.

[0105] In one embodiment, the side magnet 231 includes a second side magnet 2312 disposed corresponding to each minor axis side 12, and each second side magnet 2312 and the common magnetic part 24 are located on opposite sides of the central magnetic part 22. It can be understood that each second side magnet 2312 is disposed corresponding to a minor axis side 12, and the second side magnet 2312 may optionally be disposed in a strip shape and extend along the length direction of the minor axis side 12.

[0106] In another embodiment, the side magnet 231 includes a plurality of second side magnets 2312 disposed corresponding to each minor axis side 12, and the plurality of second side magnets 2312 disposed corresponding to each minor axis side 12 are arranged adjacently along the extending direction of the minor axis side 12. It can be understood that each minor axis side 12 corresponds to a plurality of second side magnets 2312, and the plurality of second side magnets 2312 are arranged adjacently or at intervals along the length direction of the minor axis side 12.

[0107] Optionally, the first washer 2321 corresponding to each major axis side 11 may include one or more, which is not limited here. Optionally, the second washer 2322 corresponding to each minor axis side 12 may include one or more, which is not limited here.

[0108] To facilitate the processing of the edge washer 232, in this embodiment, the first edge washer 2321 and the second edge washer 2322 of the edge washer 232 are integrally molded. To further simplify the processing steps, in one embodiment, the first edge washer 2321 and the second edge washer 2322 of the edge washer 232 are integrally injection molded with the outer shell 1. It is understood that the outer shell 1 can be a plastic part, and the edge washer 232 can be a metal magnetic plate. The integral injection molding of the outer shell 1 and the edge washer 232 can ensure structural stability and simplify the processing steps.

[0109] In one embodiment, the common magnetic part 24 is provided with a clearance structure 243 corresponding to the conductive support piece 34. It is understood that, as Figures 3 to 5 , Figure 7 and Figure 9 As shown, placing the conductive support plate 34 in the vibration system 3 will correspondingly increase the thickness of the diaphragm assembly 31. By providing an avoidance structure 243 in the common magnetic part 24, the avoidance structure 243 provides avoidance space for the conductive support plate 34 when it vibrates with the diaphragm assembly 31, effectively reducing the increased thickness's occupation of the vibration space, thereby ensuring the vibration space of the vibration system 3.

[0110] Optionally, the clearance structure 243 is a groove formed by the common magnetic part 24 recessing towards the guide magnetic yoke 21. Of course, in other embodiments, the clearance structure 243 may be a through-hole structure passing through the common magnetic part 24, which is not limited here.

[0111] In one embodiment, the common magnetic part 24 includes a common magnet 241 and a common washer 242 stacked together, and the common magnet 241 is connected to the magnetic yoke 21.

[0112] Understandable, such as Figure 3 , Figure 7 and Figure 10 As shown, the common magnet 241 and common washer 242 of the common magnetic part 24 have the same outer contour. In this embodiment, the central magnet 221 of the central magnetic part 22 has the same outer contour as the central washer 222, and the side magnet 231 and side washer 232 of the side magnetic part 23 have basically the same outer contour in the long axis direction. Adjacent side washer 232 are connected to form a ring structure with the same outer contour as the outer shell 1. The multiple side washer 232 integrally arranged in this way are connected to the first side of the outer shell 1 through the side facing away from the magnetic yoke 21.

[0113] Optionally, the outer casing 1 is a metal casing. In this embodiment, the outer casing 1 and the edge washer 232 of the edge magnet 23 can be integrally stamped or machined. This facilitates heat dissipation, thereby extending service life.

[0114] In one embodiment, the edge magnet portion 23 includes a layered edge magnet 231 and an edge washer 232, with the edge magnet 231 connected to the magnetic yoke 21; wherein the shared washer 242 and the edge washer 232 are integrally formed. It is understood that this arrangement allows the edge washer 232 of the edge magnet portion 23 and the shared washer 242 of the shared magnet portion 24 to be integrally formed, thereby improving processing efficiency while ensuring structural strength.

[0115] In this embodiment, as Figure 3 and Figure 10 As shown, the first side washer 2321 and the second side washer 2322, which share the washer 242 and the side washer 232, are integrally molded as a whole, and thus are integrally injection molded with the outer shell 1 as a whole component.

[0116] In one embodiment, the avoidance structure 243 includes a first avoidance region 2431 and a second avoidance region 2432 that are connected. The first avoidance region 2431 is a groove formed by the common washer 242 recessed toward the common magnet 241. The second avoidance region 2432 is a through hole structure or notch that passes through the common washer 242 and the common magnet 241 in sequence. The connecting portion 341 corresponds to the first avoidance region 2431, and each pad portion 342 corresponds to a second avoidance region 2432.

[0117] In this embodiment, as Figure 3 , Figure 5 , Figure 7 and Figure 10As shown, by setting the avoidance structure 243 as a first avoidance area 2431 and a second avoidance area 2432 that are connected, the first avoidance area 2431 is a groove formed by the common washer 242 recessed toward the common magnet 241, and the second avoidance area 2432 is a through hole structure or notch that passes through the common washer 242 and the common magnet 241 in sequence. In this way, the structural strength and magnetic field strength of the common magnetic part 24 can be ensured, and the avoidance space for the conductive support piece 34 can also be ensured.

[0118] Understandably, the connecting portion 341 of the conductive support 34 corresponds to the first clearance area 2431, and each pad portion 342 corresponds to a second clearance area 2432. This arrangement allows sufficient clearance space for the pad portion 342 and the lead portion of the voice coil 32 using the second clearance area 2432, while the first clearance area 2431 can both clear the connecting portion 341 and not affect the structural strength and magnetic field strength of the common magnetic portion 24. Optionally, the connecting portion 341 extends along the length direction of the common magnetic portion 24.

[0119] In one embodiment, the diaphragm assembly 31 includes a diaphragm 311 and a vibrating plate 312. The diaphragm 311 includes an inner fixing part 3111, a folded ring part 3112 and an outer fixing part 3113 connected sequentially from the inside to the outside. The inner fixing part 3111 is connected to the vibrating plate 312, and the outer fixing part 3113 is connected to the outer shell 1. The conductive support plate 34 is disposed on the vibrating plate 312.

[0120] In this embodiment, as Figure 1 , Figures 3 to 6 , Figure 8 and Figure 9 As shown, the diaphragm assembly 31 is configured as a two-part structure consisting of a diaphragm 311 and a vibrating plate 312. The diaphragm 311 is formed into a ring structure, and the vibrating plate 312 is optionally bonded to the inner fixing part 3111 of the diaphragm 311. Optionally, the inner fixing part 3111, the folded ring part 3112, and the outer fixing part 3113 of the diaphragm 311 are integrally formed.

[0121] Understandably, the inner fixing part 3111 and the outer fixing part 3113 of the diaphragm 311 have relative displacement in the direction of their central axis through the folded ring part 3112. Furthermore, since the inner fixing part 3111 is connected to the vibrating plate 312 and the outer fixing part 3113 is connected to the second side of the outer shell 1, the vibrating plate 312 and the outer shell 1 have relative displacement in the vibration direction. The outer periphery of the outer fixing part 3113 is also provided with a flange bent towards the outer shell 1, which further improves the connection strength with the outer shell 1.

[0122] In this embodiment, by providing the folded ring portion 3112, the range of the deformation region in the diaphragm 311 can be increased, thereby improving the relative position of the diaphragm 311 in the vibration direction. Optionally, the folded ring portion 3112 can be an upwardly convex bulge structure or a downwardly concave concave structure, which is not limited here. In this embodiment, the folded ring portion 3112 is concave to one side, which can reduce the height of the diaphragm 311 in the vibration direction, thereby correspondingly reducing the thickness of the diaphragm assembly 31 and the sound generating device 100. The folded ring portion 3112 is concave towards the magnetic circuit system 2, which can prevent the diaphragm 311 from interfering with the outer shell 1 when vibrating.

[0123] In one embodiment, the diaphragm 312 is connected to the inner fixing part 3111 on the side facing the magnetic circuit system 2, and two voice coils 32 are connected to the diaphragm 312; the diaphragm 312 is also provided with protrusions. It can be understood that by providing protrusions on the diaphragm 312, the strength of the diaphragm 312 can be improved, thereby ensuring the performance of the sound generating device 100.

[0124] In one embodiment, the conductive support 34 is an FPCB pad or conductive coating attached to the vibrating plate 312. This increases the structural diversity of the conductive support 34, thereby broadening its applicability.

[0125] Optionally, the conductive support 34 is made of FPCB material. Of course, in other embodiments, the conductive support 34 may also be a conductive coating or conductive adhesive applied to the vibrating plate 312, and this is not limited here.

[0126] In one embodiment, the conductive support 34 is a wire connected to the diaphragm 312. The wire and the two voice coils 32 are wound from a single wire. This simplifies the connection structure between adjacent voice coils 32, reduces the number of lead wires soldered to the two voice coils 32, thereby reducing the assembly process of the sound-generating device 100 and improving the assembly efficiency of the sound-generating device 100.

[0127] The present invention also proposes an electronic device including the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is as described in the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0128] In one embodiment, the electronic device further includes a device housing having an installation space, and the sound-emitting device 100 is disposed within the installation space of the device housing.

[0129] In this embodiment, the electronic device further includes a flexible circuit board. One end of the flexible circuit board is electrically connected to the sound-generating device 100, and the other end is used to connect to an external power source. It is understood that the flexible circuit board is used to connect and conduct the external circuitry to the voice coil 32 of the sound-generating device 100. The flexible circuit board has inner and outer pads. The inner pads of the flexible circuit board are connected and conduction-conducting with the sound-generating device 100, and the outer pads of the flexible circuit board are used to connect to external terminals.

[0130] In this embodiment, the device housing has an installation space, the sound-generating device 100 is disposed within the installation space of the device housing, and at least one end of the flexible circuit board connected to the sound-generating device 100 is located within the installation space of the device housing. Of course, in other embodiments, the flexible circuit board may also be entirely disposed within the installation space of the device housing, and this is not limited here.

[0131] It is understood that electronic devices can be headphones, mobile phones, MP3 players, MP4 players, computers, tablets, smart wearable devices, etc., and are not limited here. In electronic devices, the sound-generating device 100 can be assembled into the housing of the electronic device in a modular manner, or it can be assembled into the housing of the electronic device as a single unit.

[0132] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that, The sound-generating device includes: shell; A magnetic circuit system connected to the outer casing, the magnetic circuit system including a magnetic yoke and side magnetic portions, a common magnetic portion, and a central magnetic portion disposed on the magnetic yoke. The central magnetic portion is disposed on opposite sides of the common magnetic portion. The side magnetic portions are arranged around the outside of the common magnetic portion and the central magnetic portion. Each central magnetic portion, together with the side magnetic portions and the common magnetic portion surrounding it, forms a magnetic gap. A vibration system includes a diaphragm assembly, conductive supports, at least two voice coils, and four centering supports. The periphery of the diaphragm assembly is connected to the housing and is disposed opposite to the magnetic circuit system. The four centering supports are respectively disposed at the four corners of the housing. A plurality of 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 a magnetic gap. Along the direction of the parallel arrangement of the plurality of voice coils, the voice coils at both ends are respectively connected to the corresponding two centering supports. The conductive supports are disposed on the side of the diaphragm assembly facing the magnetic circuit system and are located between two adjacent voice coils. The lead portions of two adjacent voice coils are electrically connected to the conductive supports, so that the two adjacent voice coils are connected in series. The number of conductive support pieces is the same as the number of common magnetic parts. Each conductive support piece includes a connecting part and two pads located at both ends of the connecting part. The two pads are located on opposite sides of the connecting part. The connecting part extends along the length direction of the common magnetic part, and the projection of each connecting part along the vibration direction of the vibration system is located at the middle position of each common magnetic part. The common magnetic part is provided with an avoidance structure corresponding to the conductive support sheet; Wherein, the avoidance structure is a groove formed by the common magnetic part being recessed toward the magnetic yoke; or, the avoidance structure is a through hole structure that passes through the common magnetic part.

2. The sound-generating device as described in claim 1, characterized in that, The outer shell has two long axis sides and two short axis sides connected end to end, and the corner is formed at the connection between the long axis side and the short axis side. The multiple voice coils are arranged at intervals along the extension direction of the long axis, and the extension direction of the common magnet is consistent with the extension direction of the short axis and is located between two adjacent voice coils.

3. The sound-generating device as described in claim 2, characterized in that, The connecting portion along the central axis of the short axis coincides with the central axis of the common magnetic portion along the short axis; And / or, the connecting portion coincides with the central axis of the long axis of the voice coil along the central axis of the long axis side.

4. The sound-generating device as described in claim 2, characterized in that, The side magnetic part is provided with a clearance notch that connects to the magnetic gap for each corner, and each centering support is provided with a clearance notch. One end of each centering support is connected to the corner, and the other end of each centering support extends into the magnetic gap and is connected to the voice coil.

5. The sound-generating device as described in claim 4, characterized in that, The side magnetic part includes a side magnet and a side washer stacked together, and the side magnet is connected to the magnetic yoke; The side magnet includes a first side magnet extending along the long axis and a second side magnet extending along the short axis, with the clearance gap formed between adjacent first side magnets and second side magnets; The edge washer includes a first edge washer extending along the long axis and a second edge washer extending along the short axis, wherein the first edge washer corresponds to the first edge magnet and the second edge washer corresponds to the second edge magnet.

6. The sound-generating device as described in claim 5, characterized in that, The side magnet includes two first side magnets, each of which is disposed corresponding to one of the long axis sides; Alternatively, the number of voice coils is N, where N≥2, and the side magnets include 2N first side magnets, with each N first side magnets corresponding to one of the major axis sides and arranged at intervals along the extension direction of the major axis side so that a gap is formed between two adjacent first side magnets. The gap is opposite to the common magnetic part, and the width of the gap along the extension direction of the major axis side is smaller than the width of the common magnetic part along the extension direction of the major axis side.

7. The sound-generating device as described in claim 5, characterized in that, The side magnet includes a second side magnet disposed corresponding to each of the short axis sides, and each second side magnet and the common magnetic part are located on opposite sides of the central magnetic part; or, the side magnet includes a plurality of second side magnets disposed corresponding to each of the short axis sides, and the plurality of second side magnets disposed corresponding to each of the short axis sides are arranged adjacent to each other along the extension direction of the short axis side.

8. The sound-generating device as described in claim 5, characterized in that, The avoidance gap is formed between the adjacent first and second side washers; And / or, the first and second side washers are integrally injection molded with the outer shell; And / or, the first edge washer corresponding to each of the major axis edges includes one or more; And / or, the second side washer corresponding to each of the short axis sides includes one or more.

9. The sound-generating device as claimed in claim 1, characterized in that, The common magnetic part includes a common magnet and a common washer stacked together, and the common magnet is connected to the magnetic yoke; The avoidance structure includes a first avoidance area and a second avoidance area that are connected. The first avoidance area is a groove formed by the common washer recessing towards the common magnet. The second avoidance area is a through-hole structure or notch that sequentially passes through the common washer and the common magnet. The connection portion corresponds to the first clearance area, and each of the solder pad portions corresponds to a second clearance area.

10. The sound-generating device as claimed in claim 9, characterized in that, The side magnetic part includes a side magnet and a side washer stacked together, and the side magnet is connected to the magnetic yoke; The shared washer and the edge washer are integrally formed.

11. The sound-generating device according to any one of claims 1 to 10, characterized in that, The diaphragm assembly includes a diaphragm and a vibrating plate. The diaphragm includes an inner fixing part, a folded ring part, and an outer fixing part connected sequentially from the inside to the outside. The inner fixing part is connected to the vibrating plate, and the outer fixing part is connected to the outer shell. The conductive support is disposed on the vibrating plate.

12. The sound-generating device as claimed in claim 11, characterized in that, The conductive support is an FPCB pad attached to the vibrating plate; Alternatively, the conductive support sheet may be a conductive coating attached to the vibrating plate; Alternatively, the conductive support is a wire connected to the vibrating plate, and the wire and the two voice coils are made of a single wire.

13. The sound-generating device as claimed in any one of claims 1 to 10, characterized in that, There are two voice coils, one conductive support piece located between the two voice coils, and one common magnet located between the two central magnets. The conductive support piece is arranged opposite to the common magnet piece along the vibration direction of the vibration system.

14. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 13.

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