Sound production device and electronic device

Abstract

The application discloses a sound production device and an electronic device. The sound production device comprises a magnetic circuit system and a vibration assembly; the magnetic circuit system is formed with a first magnetic gap and a second magnetic gap arranged side by side and spaced apart along a first direction, and the first magnetic gap and the second magnetic gap are spaced apart to form an assembly gap; the vibration assembly comprises a diaphragm assembly, a first voice coil and a second voice coil, and a centering bracket; the centering bracket comprises a main body part, a first connecting arm, a second connecting arm, a first vibration arm and a second vibration arm, and is located in the assembly gap; the first connecting arm and the second connecting arm are electrically connected with the first voice coil and the second voice coil respectively, and are fixed to the diaphragm assembly; the first vibration arm and the second vibration arm are accommodated in the assembly gap, and the ends away from the main body part are provided with a first solder pad and a second solder pad electrically connected with the first vibration arm and the second vibration arm. The sound production device provided by the application considers the thinning of the volume and the sound production performance.

Description

Technical Field

[0001] This application belongs to the field of electroacoustic conversion technology, specifically relating to a sound-generating device and an electronic device. Background Technology

[0002] With the rapid development of the consumer electronics industry, consumer electronics products such as mobile phones, tablets, and computers have become deeply integrated into people's daily lives. High performance, thinness, and high quality are gradually becoming the mainstream demands of consumers for electronic products, and speakers, as an important component in electronic products, also meet these demands.

[0003] Current dual-voice-coil sound-generating devices generally employ a split four-corner spring or a straight-line central centering support structure. The two centering supports are independently constrained, resulting in poor synchronization of sound vibrations and a tendency to produce rolling vibrations and polarization distortion. Furthermore, the aforementioned centering support structure leads to solder pads being located at the corners of the cavity, occupying internal magnetic circuit space, limiting magnet size and acoustic performance, making it difficult to simultaneously achieve a slim and lightweight design and optimal acoustic performance.

[0004] Therefore, there is an urgent need to develop a lightweight, thin, and high-performance speaker. Summary of the Invention

[0005] This application aims to provide a sound-generating device and electronic device that at least solves one of the problems of the prior art.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows: According to a first aspect of this application, a sound-generating device is provided, comprising: A magnetic circuit system having a first magnetic gap and a second magnetic gap arranged side-by-side along a first direction, the first magnetic gap and the second magnetic gap being spaced apart to form an assembly gap extending along a third direction; A vibration assembly is disposed on one side of the magnetic circuit system and vibrates along a second direction. The vibration assembly includes a diaphragm assembly, a first voice coil, and a second voice coil. The first voice coil and the second voice coil are respectively disposed on the side of the diaphragm assembly close to the magnetic circuit system. The side of the first voice coil away from the diaphragm assembly is corresponding to the first magnetic gap. The side of the second voice coil away from the diaphragm assembly is corresponding to the second magnetic gap. The vibration assembly further includes a centering support plate, which includes a main body portion located within the assembly gap, a first connecting arm and a second connecting arm extending relative to the main body portion along the first direction, and a first vibration arm and a second vibration arm extending relative to both ends of the main body portion along a third direction, respectively. The first connecting arm and the second connecting arm are electrically connected to the first voice coil and the second voice coil, respectively, and are fixed to the diaphragm assembly. The first vibrating arm and the second vibrating arm are both housed in the assembly gap, and the end of the first vibrating arm away from the main body is provided with a first pad and a second pad that are electrically connected to the first vibrating arm and the second vibrating arm. Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

[0007] Optionally, the first vibrating arm and the second vibrating arm are in the same plane in the second direction and extend meanderingly along the third direction, respectively.

[0008] Optionally, the first connecting arm includes a first support segment extending along the second direction and a first connecting segment extending along the first direction, a first end of the first support segment being connected to the main body, a second end of the first support segment being connected to the first end of the first connecting segment, and a second end of the first connecting segment being electrically connected to the first voice coil. And / or, the second connecting arm includes a second support segment extending along the second direction and a second connecting segment extending along the first direction, a first end of the second support segment being connected to the main body, a second end of the second support segment being connected to the first end of the second connecting segment, and a second end of the second connecting segment being electrically connected to the second voice coil.

[0009] Optionally, the magnetic circuit system includes a magnetic yoke, a first central magnetic section, a second central magnetic section, and two side magnetic sections; The first central magnetic part and the second central magnetic part are arranged side by side and spaced apart along the first direction on the magnetic yoke. The assembly gap is located between the first central magnetic part and the second central magnetic part. The two side magnetic parts are arranged outside the first central magnetic part and the second central magnetic part and are spaced apart from the first central magnetic part and the second central magnetic part, respectively.

[0010] Optionally, the magnetic yoke is bent at both sides along the first direction toward the vibration assembly to form a first bent portion and a second bent portion, the first bent portion and the first central magnetic portion are spaced apart to form a portion of the first magnetic gap, and the second bent portion and the second central magnetic portion are spaced apart to form a portion of the second magnetic gap.

[0011] Optionally, the magnetic circuit system further includes a magnetically conductive component disposed within the assembly gap. The magnetically conductive component includes a magnetically conductive body and a receiving space disposed within the magnetically conductive body. The main body, the first vibrating arm, and the second vibrating arm are located within the receiving space.

[0012] Optionally, the magnetically conductive body includes a horizontally extending first plate portion and two second plate portions disposed at both ends of the first plate portion in the first direction, the two second plate portions extending along the second direction, and the first plate portion and the two second plate portions together forming the accommodating space.

[0013] Optionally, the magnetically conductive component and the magnetically conductive yoke are integrally formed. And / or, the extension length of the second plate portion along the third direction is greater than the extension length of the first plate portion along the third direction; And / or, the first plate portion and the two second plate portions are formed as an integrally molded structure.

[0014] Optionally, the magnetic yoke has a clearance gap between the two side magnetic portions, and the first pad and the second pad are respectively exposed within the clearance gap.

[0015] Optionally, the magnetic yoke includes a support portion located between the two side magnetic portions, one end of the support portion being connected to the body portion of the magnetic yoke, and the other end of the support portion extending along the second direction and supporting a portion of the first pad and a portion of the second pad, wherein the clearance gap is located outside the third direction of the support portion.

[0016] Optionally, the vibration assembly further includes a support frame, one end of which is connected to the centering support plate, and the other end of which extends along the second direction and is connected to the diaphragm assembly.

[0017] Optionally, the support frame includes a first support member extending along the second direction and a second support member extending along the first direction, one end of the first support member being connected to the main body, the other end of the first support member being connected to the second support member, and the second support member being fixed to the diaphragm assembly; And / or, there are two support frames, which are spaced apart along the third direction, and the second support members of the two support frames extend in opposite directions along the first direction; And / or, the support frame includes one first support member and two second support members, each second support member being connected to the end of the first support member away from the main body, and the two second support members being spaced apart along the third direction, and the two support frames extending in opposite directions along the first direction.

[0018] According to a second aspect of this application, an electronic device is provided, comprising: The sound-generating device described in the first aspect.

[0019] This solution employs a centering support plate located within the assembly gap between the two voice coils. Its first and second connecting arms are respectively connected to the two voice coils, which can synchronously constrain their displacement, effectively suppressing the polarization generated by the vibration system and reducing harmonic distortion. In addition, the ends of the first and second vibration arms away from the main body are electrically connected to the first and second solder pads. On the one hand, this can shorten the circuit lead path, significantly reduce the risk of wire breakage caused by reciprocating pulling, free up magnetic circuit layout space to improve magnetic field utilization, and on the other hand, it can achieve higher assembly integration, taking into account both lightweight design and acoustic performance.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is the sound-generating device provided in this application; Figure 2 yes Figure 1 A bottom view; Figure 3 yes Figure 1 One of the exploded images; Figure 4 yes Figure 1 One of the AA section diagrams; Figure 5 yes Figure 1 One of the BB cross-sectional diagrams; Figure 6 This is a schematic diagram of the magnetic circuit system provided in this application; Figure 7 This is one of the schematic diagrams of the centering support provided in this application; Figure 8 This is one of the schematic diagrams of the magnetically conductive yoke provided in this application; Figure 9 This is an assembly diagram of the centering support, magnetic yoke, and magnetic components provided in this application; Figure 10 This is a schematic diagram of the supporting skeleton provided in this application; Figure 11 This is an assembly diagram of the magnetically conductive component provided in this application; Figure 12 yes Figure 1 Exploded view number two; Figure 13 yes Figure 1 AA section diagram two; Figure 14 yes Figure 1 BB cross-section diagram two; Figure 15 This is the second schematic diagram of the centering support provided in this application; Figure 16 yes Figure 1 Exploded view number three; Figure 17 This is the second schematic diagram of the magnetic yoke provided in this application.

[0022] Figure label: 1. Magnetic circuit system; 11. First magnetic gap; 12. Second magnetic gap; 13. Assembly gap; 14. Magnetic yoke; 141. First bend; 142. Second bend; 143. Clearance gap; 144. Support; 15. First central magnetic part; 151. First central magnet; 152. First central washer; 16. Second central magnetic part; 161. Second central magnet; 162. Second central washer; 17. Side magnetic part; 18. Magnetic guiding component; 181. Magnetic guiding body; 182. Accommodation space; 183. First plate; 184. Second plate; 2. Vibration assembly; 21. First voice coil; 22. Second voice coil; 23. Diaphragm assembly; 231. Diaphragm; 232. Dome; 24. Centering support; 241. First connecting arm; 2411. First support section; 2412. First connecting section; 242. Second connecting arm; 2421. Second support section; 2422. Second connecting section; 243. First vibrating arm; 244. Second vibrating arm; 245. Main body; 246. First solder pad; 247. Second solder pad; 25. Support frame; 251. First support member; 252. Second support member; 3. Shell; 4. FPCB; X, third direction; Y, first direction; Z, second direction. Detailed Implementation

[0023] Embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application are within the scope of protection of this application.

[0024] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] The following is combined with Figures 1-17 This application describes a sound-generating device and an electronic device according to embodiments thereof.

[0028] like Figures 1 to 17As shown, according to a first aspect of this application, a sound-generating device is provided, including a magnetic circuit system 1 and a vibration assembly 2; the magnetic circuit system 1 forms a first magnetic gap 11 and a second magnetic gap 12 arranged side-by-side along a first direction (referring to the Y direction in the figures), the first magnetic gap 11 and the second magnetic gap 12 being spaced apart to form an assembly gap 13 extending along a third direction (referring to the X direction in the figures); the vibration assembly 2 is disposed on one side of the magnetic circuit system 1 and vibrates along a second direction (referring to the Z direction in the figures), the vibration assembly 2 includes a diaphragm assembly 23, a first voice coil 21 and a second voice coil 22, the first voice coil 21 and the second voice coil 22 are respectively disposed on the side of the diaphragm assembly 23 near the magnetic circuit system 1, the side of the first voice coil 21 away from the diaphragm assembly 23 is correspondingly disposed with respect to the first magnetic gap 11, and the side of the second voice coil 22 away from the diaphragm assembly 23 is correspondingly disposed with respect to the second magnetic gap 11. The magnetic gap 12 is correspondingly provided; the vibration assembly 2 also includes a centering support plate 24, which includes a main body 245 located in the assembly gap 13, a first connecting arm 241 and a second connecting arm 242 extending relative to the main body 245 along a first direction, and a first vibrating arm 243 and a second vibrating arm 244 extending relative to the two ends of the main body 245 along a third direction, respectively; the first connecting arm 241 and the second connecting arm 242 are electrically connected to the first voice coil 21 and the second voice coil 22, respectively, and are fixed to the diaphragm assembly 23, and the first vibrating arm 243 and the second vibrating arm 244 are both housed in the assembly gap 13, and the end of the first vibrating arm 243 away from the main body 245 is provided with a first pad 246 and a second pad 247 electrically connected to the first vibrating arm 243 and the second vibrating arm 244; wherein, the first direction, the second direction and the third direction are perpendicular to each other.

[0029] Specifically, in this embodiment, a first magnetic gap 11 and a second magnetic gap 12 are arranged side-by-side and spaced apart along a first direction inside the magnetic circuit system 1. An assembly gap 13 extending along a third direction is also formed in the region between the first magnetic gap 11 and the second magnetic gap 12. This assembly gap 13 provides a space 182 for the centering support 24, and the magnetic circuit system 1 can form a uniform and constant magnetic field environment within the first magnetic gap 11 and the second magnetic gap 12. The vibration assembly 2 is arranged on the side of the magnetic circuit system 1 facing the diaphragm assembly 23, and reciprocates along a second direction during operation.

[0030] Meanwhile, the vibration assembly 2 includes a diaphragm assembly 23, a first voice coil 21, a second voice coil 22, and a centering support 24. The vibration assembly 2 typically includes a diaphragm 231 and a dome 232. The first voice coil 21 and the second voice coil 22 are uniformly mounted on the side of the diaphragm assembly 23 closest to the magnetic circuit system 1. The lower end of the first voice coil 21 can extend into the first magnetic gap 11, and the lower end of the second voice coil 22 extends into the second magnetic gap 12. When an external electrical signal is transmitted to the first voice coil 21 and the second voice coil 22 through the circuit, the energized first voice coil 21 and the second voice coil 22 will be driven by Ampere force in the magnetic field of their respective magnetic gaps, thereby causing the upper diaphragm assembly 23 to vibrate synchronously up and down in the second direction. The diaphragm assembly 23 compresses and disturbs the surrounding air medium, ultimately converting the electrical signal into sound waves for outward output. The vibration assembly 2 and the magnetic circuit system 1 can be simultaneously fixedly mounted within the housing 3.

[0031] In this embodiment, the centering support 24 is a core auxiliary component in the vibration assembly 2 that maintains the stability of the dual voice coil vibration and conducts the circuit. It includes a main body 245 placed inside the assembly gap 13, a first vibration arm 243 and a second vibration arm 244 extending from both ends of the main body 245 along a third direction, and a first connecting arm 241 and a second connecting arm 242 extending outward from the main body 245 along a first direction and respectively fixedly electrically connected to the first voice coil 21 and the second voice coil 22. The first connecting arm 241 and the second connecting arm 242 can realize the linkage between the dual voice coil and the diaphragm assembly 23. The ends of the first vibration arm 243 and the second vibration arm 244 opposite to the main body 245 are respectively provided with a first pad 246 and a second pad 247, so that the external FPCB 4. Audio electrical signals can be transmitted to the centering support plate 24 through the first pad 246 and the second pad 247. The current is completely conducted to the first voice coil 21 and the second voice coil 22 through the first vibrating arm 243, the second vibrating arm 244, the main body 245, the first connecting arm 241 and the second connecting arm 242.

[0032] In practical applications, this embodiment reduces the overall size of the device without sacrificing its acoustic performance by using a layout of dual voice coils and dual magnetic gaps in the magnetic circuit system 1, and a centering support plate 24 in the intermediate assembly gap 13. This balances the design requirements of sound performance and overall thinness. Regarding sound performance, the magnetic circuit system 1 employs a dual magnetic circuit structure with a first magnetic gap 11 and a second magnetic gap 12 arranged side-by-side. This allows for simultaneous synchronous operation of the first voice coil 21 and the second voice coil 22. The simultaneous driving force of the dual voice coils under the magnetic field effectively enhances the overall driving force of the diaphragm assembly 23, broadens the frequency response range of the sound-generating device, and increases the loudness of the sound output. Furthermore, the synchronous limiting effect of the centering support plate 24 reduces distortion and improves low-frequency extension and mid-to-high-frequency resolution.

[0033] Meanwhile, the first connecting arm 241 and the second connecting arm 242 of the centering support 24 are electrically connected to the first voice coil 21 and the second voice coil 22, respectively, and fixed to the diaphragm assembly 23. This allows the first connecting arm 241 and the second connecting arm 242 to provide radial limiting for the first voice coil 21 and the second voice coil 22, respectively. Combined with the first vibrating arm 243 and the second vibrating arm 244 housed in the assembly gap 13, this constrains the voice coil to vibrate axially only in the second direction. This solves the problems of lateral displacement of the voice coil and rubbing against the inner wall of the magnetic circuit. It also maintains a stable vibration pattern over long-term use, avoiding polarization. Furthermore, the centering support 24 integrates a conductive path. It connects to the external circuit via the first solder pad 246 and the second solder pad 247 at the outer ends of the first vibrating arm 243 and the second vibrating arm 244. The current transmission path is regular, reducing signal loss and ensuring that the electrical signal is completely converted into vibrating sound waves. This multi-dimensional approach, including magnetic field drive, vibration limiting, and circuit conduction, ensures excellent and stable sound performance of the device.

[0034] In terms of lightweight design, compared to the traditional thick layout where the centering support plate 24 covers the entire outer side of the magnetic circuit, or the structure of the centering support plate 24 in the middle of the split four corner springs or the straight middle centering support plate 24, this embodiment houses the main body 245, the first vibrating arm 243, and the second vibrating arm 244 of the centering support plate 24 within the assembly gap 13 between the first magnetic gap 11 and the second magnetic gap 12. This allows the first solder pad 246 and the second solder pad 247 to also be located within the assembly gap 13, making full use of the idle space in the middle of the magnetic circuit system 1. It eliminates the need to reserve additional stacking thickness of the centering support plate 24 between the magnetic circuit system 1 and the diaphragm assembly 23, or to reserve space for the centering support plate 24 on the periphery of the magnetic circuit system 1. This reduces the stacking height or overall length and width between the magnetic circuit system 1 and the diaphragm assembly 23, improves the integration of the sound-generating device, and reduces the overall volume of the sound-generating device.

[0035] Meanwhile, the parallel double magnetic gap structure of the magnetic circuit system 1 itself does not require additional radial thickness. All functional components of the entire sound-generating device are assembled by making full use of the idle assembly gap 13 inside the magnetic circuit system 1. There is no need to stack multiple layers of parts in the second direction (thickness direction) of the whole machine. While ensuring the complete preservation of the high-performance sound-generating structure of the dual voice coil and the full realization of the centering support 24 limiting and conducting functions, the size of the whole machine is compressed to the maximum extent, which is suitable for the assembly requirements of the ultra-thin and miniaturized sound-generating device, and achieves the technical effect of balancing high-performance sound generation and a thin and light body.

[0036] Optionally, such as Figure 7 and Figure 9 As shown, the first vibrating arm 243 and the second vibrating arm 244 are in the same plane in the second direction and extend meanderingly along the third direction, respectively.

[0037] Specifically, in this embodiment, the first vibrating arm 243 and the second vibrating arm 244 of the centering support 24 are designed to be on the same plane, with no height misalignment in the thickness direction. They can be completely housed within the narrow assembly gap 13 between the two magnetic gaps in the magnetic circuit system 1. This avoids bulging and stacking along the thickness direction of the entire device and does not excessively occupy the length dimension of the sound-generating device, thus meeting the design requirements for a thinner and lighter sound-generating device. In addition, the two vibrating arms adopt a wavy, meandering structure along the third direction, which has a longer effective extension length compared to a straight arm. When the dual voice coils and diaphragm assembly 23 reciprocate along the second direction, the meandering arm section can provide sufficient elastic deformation margin, significantly buffering the stress generated during the vibration process and preventing the vibrating arms from breaking or fatigue failure due to frequent stretching and bending. At the same time, the gentle wave deformation can constrain the voice coil to move only axially along the second direction, effectively suppressing the lateral displacement of the voice coil and the phenomenon of rubbing against the inner wall of the magnetic gap, reducing sound distortion, and ensuring the structural reliability of long-term vibration.

[0038] Furthermore, the coplanar meandering vibrating arms allow for the complete laying of conductive lines within the same plane. One end connects to the main body 245 of the centering support plate 24, while the other end extends to the area of ​​the first pad 246 and the second pad 247 to connect with the external FPCB 4. This ensures that the internal conductive path is continuous and regular, and bending deformation will not damage the conductivity of the lines, guaranteeing stable transmission of audio signals to the connecting arms and voice coils on both sides. The two sets of symmetrical coplanar meandering vibrating arms are subjected to uniform force, and their buffering and limiting effect on the two voice coils is consistent during vibration. This significantly improves the vibration synchronization of the first voice coil 21 and the second voice coil 22, resulting in better consistency in the vibration of the diaphragm assembly 23 driven by the dual voice coils. This further optimizes the frequency response and loudness output of the sound-generating device. Without occupying additional thickness or length space, and simplifying the assembly structure, this device simultaneously achieves multiple benefits such as structural durability, stable vibration, excellent sound quality, and a slim and lightweight design.

[0039] Optionally, such as Figure 7 As shown, the first connecting arm 241 includes a first support segment 2411 extending in a second direction and a first connecting segment 2412 extending in a first direction. The first end of the first support segment 2411 is connected to the main body 245, the second end of the first support segment 2411 is connected to the first end of the first connecting segment 2412, and the second end of the first connecting segment 2412 is electrically connected to the first voice coil 21; and / or, the second connecting arm 242 includes a second support segment 2421 extending in a second direction and a second connecting segment 2422 extending in a first direction. The first end of the second support segment 2421 is connected to the main body 245, the second end of the second support segment 2421 is connected to the first end of the second connecting segment 2422, and the second end of the second connecting segment 2422 is electrically connected to the second voice coil 22.

[0040] Specifically, in this embodiment, the first connecting arm 241 is divided into a first support segment 2411 arranged along the second direction and a first connecting segment 2412 arranged along the first direction. The second connecting arm 242 is correspondingly provided with a second support segment 2421 extending along the second direction and a second connecting segment 2422 extending along the first direction. The two segments are connected end to end. The roots of the first support segment 2411 and the second support segment 2421 are both fixed to the main body 245 of the centering support piece 24. The ends of the first connecting segment 2412 and the second connecting segment 2422 are connected to the corresponding voice coils to complete the electrical connection. This segmented bending structure, combined with the three-dimensional vertical arrangement of the whole machine, can simultaneously achieve multiple beneficial effects such as spatial adaptation, vibration limiting, electrical conductivity stability, and lightweight assembly.

[0041] In practical operation, the first support section 2411 and the second support section 2421 extend vertically along the second direction corresponding to the thickness of the whole machine, while the first connecting section 2412 and the second connecting section 2422 extend laterally along the first direction to the first voice coil 21 and the second voice coil 22. The two sections are bent at right angles, making full use of the layered three-dimensional space between the first magnetic gap 11 and the second magnetic gap 12 and the diaphragm assembly 23. There is no need to stack multiple layers of components in the thickness direction, and the overall thickness of the sound-generating device will not be increased, which is suitable for the thin and light design requirements of the equipment. In addition, the segmented design of the first support section 2411 and the second support section 2421 connecting the main body 245 and the first connecting section 2412 and the second connecting section 2422 connecting the first voice coil 21 and the second voice coil 22 avoids the assembly gap 13 in the middle of the magnetic circuit and does not interfere with the meandering vibration arms on both sides, which makes the assembly fault tolerance higher and the assembly process simpler.

[0042] Furthermore, the vertical first support section 2411 and the second support section 2421 can provide stable radial limiting constraints, which can limit the lateral displacement of the first voice coil 21 and the second voice coil 22 in the left and right and front and back directions, allowing them to only reciprocate axially in the second direction, effectively preventing the voice coil from rubbing against the magnetic circuit system 1 and reducing sound distortion; the horizontal first connecting section 2412 and the second connecting section 2422 can buffer the tensile stress caused by the vibration when the diaphragm assembly 23 and each voice coil vibrate at high frequency, avoiding stress concentration and fracture at the welding positions of the first connecting arm 241, the second connecting arm 242 and the first voice coil 21, the second voice coil 22 and the main body 245, and improving the overall service life of the centering support 24.

[0043] Understandably, the integrated bent first connecting arm 241 and second connecting arm 242 also integrate complete conductive circuits. Electrical signals can be smoothly transmitted from the main body 245 through each support section to each connecting section, and finally delivered to the first voice coil 21 and the second voice coil 22. The segmented bending structure will not cause circuit breaks or impedance changes, ensuring continuous and stable audio signal transmission. At the same time, the first connecting arm 241 and the second connecting arm 242 are independently segmented and molded, respectively driving the two voice coils. The vibration force on both sides is balanced, the vibration synchronization of the two voice coils is stronger, and the overall acoustic output of the device is more balanced. While taking into account the thinness and compactness of the components, the structural reliability and sound quality performance are improved simultaneously.

[0044] Optionally, such as Figures 12 to 16 As shown, the first connecting arm 241 and the second connecting arm 242 are both on the same plane as the main body 245 in the second direction; the first vibrating arm 243 and the second vibrating arm 244 are bent and extended from the main body 245 toward the magnetic circuit system 1, respectively.

[0045] Specifically, in this embodiment, the first connecting arm 241 and the second connecting arm 242 are both on the same plane as the main body 245, resulting in better overall molding continuity, smooth conductive lines without abrupt bends, reduced signal transmission loss, reduced stress concentration points, and improved overall structural strength of the centering support 24.

[0046] Meanwhile, the first vibrating arm 243 and the second vibrating arm 244 are bent downwards and extended into the assembly gap 13 of the magnetic circuit system 1, making full use of the assembly gap 13 of the magnetic circuit system 1. This eliminates the need for additional space to be reserved between the diaphragm 231 and the magnetic circuit system 1 for the centering support plate 24, which is beneficial for achieving a thinner and lighter overall design. In addition, the first vibrating arm 243 and the second vibrating arm 244 can be accommodated within the assembly gap 13 after bending. During vibration, they are limited by the side wall of the assembly gap 13, which can suppress the lateral displacement of the dual voice coils and reduce the risk of magnetization and distortion.

[0047] The coplanar first connecting arm 241 and second connecting arm 242 can smoothly transmit vibration and electrical signals to the first voice coil 21 and the second voice coil 22. The bent first vibrating arm 243 and second vibrating arm 244 can provide sufficient elastic deformation margin. The two work together to ensure the synchronicity of the vibration of the two voice coils and to buffer the alternating stress caused by reciprocating vibration, avoiding the breakage of the centering support 24 circuit. While optimizing the acoustic performance, it also improves the long-term reliability of the device.

[0048] Optionally, such as Figure 3 , Figure 12 and Figure 16As shown, the magnetic circuit system 1 includes a magnetic yoke 14, a first central magnetic part 15, a second central magnetic part 16, and two side magnetic parts 17. The first central magnetic part 15 and the second central magnetic part 16 are arranged side by side and spaced apart from each other along a first direction on the magnetic yoke 14. The assembly gap 13 is located between the first central magnetic part 15 and the second central magnetic part 16. The two side magnetic parts 17 are arranged outside the first central magnetic part 15 and the second central magnetic part 16 and are spaced apart from the first central magnetic part 15 and the second central magnetic part 16, respectively.

[0049] Specifically, in this embodiment, the magnetic circuit system 1 is composed of a magnetic yoke 14, a first central magnetic part 15, a second central magnetic part 16, and two sets of side magnetic parts 17. The first central magnetic part 15 and the second central magnetic part 16 are installed side by side on the magnetic yoke 14 along a first direction with a gap 13 reserved between them for the corresponding structure of the centering support 24. The two sets of side magnetic parts 17 are respectively arranged outside the first central magnetic part 15 and the second central magnetic part 16, and the side magnetic parts 17 are spaced apart from the adjacent central magnetic parts. The first central magnetic part 15 typically includes a first central magnet 151 and a first central washer 152 disposed on the side of the first central magnet 151 near the diaphragm assembly 23. The second central magnetic part 16 includes a second central magnet 161 and a second central washer 162 disposed on the side of the second central magnet 161 near the diaphragm assembly 23. The side magnetic parts 17 typically include a side magnet and a side washer disposed on the side of the side magnet near the diaphragm assembly 23, thus realizing the assembly of the entire magnetic circuit system 1.

[0050] The combination of the dual central magnetic section and the outer side magnetic section 17 can construct two independent and uniform magnetic field loops. The space between each central magnetic section and the corresponding outer side magnetic section 17 forms the first magnetic gap 11 and the second magnetic gap 12, respectively, which can match the first voice coil 21 and the second voice coil 22 to work synchronously. The dual magnetic gaps can output stronger and more uniform magnetic induction intensity, greatly improve the electromagnetic driving force on the voice coil, broaden the frequency response range of the sound-generating device, improve the low-frequency loudness, reduce vibration distortion, and effectively improve the overall acoustic output performance of the device.

[0051] In addition, an assembly gap 13 is formed between the first central magnet 15 and the second central magnet 16. This allows for the built-in accommodating space for the main body 245 of the centering support 24, the first vibrating arm 243, and the second vibrating arm 244 without the need for additional thinning of the magnet or expansion of the overall external dimensions. This enables the centering support 24 to be completely housed within the assembly gap 13, eliminating the need for additional stacking thickness between the magnetic circuit system 1 and the diaphragm assembly 23 and reducing the overall thickness. At the same time, the magnetic yoke 14 uniformly supports the entire magnetic circuit system 1, which can gather and converge the magnetic field lines of the magnet, reduce magnetic field leakage, further improve the magnetic field utilization rate of the magnetic gap, and avoid drive efficiency loss caused by magnetic force leakage.

[0052] Furthermore, the layout of the first central magnetic part 15 and the second central magnetic part 16 being separated from the corresponding side magnetic parts 17 ensures that the magnetic fields of the two sets of magnetic gaps do not interfere with each other, the vibration of the voice coils on both sides is balanced, the synchronous vibration of the two voice coils is more consistent, and the partitioned arrangement of each magnet facilitates individual processing and assembly, reduces the difficulty of assembly alignment, and reduces the production defect rate. While enhancing the sound performance and achieving the thinness of the device, it also takes into account the convenience of magnetic circuit structure production, processing and assembly.

[0053] Optionally, such as Figure 5 and Figure 14 As shown, the magnetic yoke 14 is bent towards the vibration assembly 2 on both sides along the first direction to form a first bent portion 141 and a second bent portion 142. The first bent portion 141 and the first central magnetic portion 15 are spaced apart to form a partial first magnetic gap 11, and the second bent portion 142 and the second central magnetic portion 16 are spaced apart to form a partial second magnetic gap 12.

[0054] Specifically, in this embodiment, the magnetic yoke 14 is bent along both sides of the first direction toward the vibrating component 2 to form a first bent portion 141 and a second bent portion 142. The first bent portion 141 and the second bent portion 142 are spaced apart from the corresponding first central magnetic portion 15 and the second central magnetic portion 16, respectively, forming a first magnetic gap 11 and a second magnetic gap 12. On the one hand, each bent portion can gather the magnetic field lines and form a closed magnetic circuit with the central magnetic portion, which greatly reduces magnetic leakage, increases the magnetic induction intensity inside the magnetic gap, enhances the electromagnetic driving force of the voice coil, and optimizes the loudness and low-frequency performance of the sound-generating device. On the other hand, each bent portion is directly integrally formed on the magnetic yoke 14, without the need for additional magnetic conductive accessories, which simplifies the number of magnetic circuit parts, reduces assembly processes and production costs, and reduces the increase in overall thickness caused by component stacking, meeting the requirements for thinner and lighter devices.

[0055] Furthermore, each bend and its corresponding central magnetic part work together to define the corresponding magnetic gap width. The gap size is uniform and stable, which can constrain the corresponding voice coil to vibrate only along the axial direction, reducing the risk of voice coil misalignment and magnetization, and reducing sound distortion. The first bend 141 and the second bend 142 on both sides can be arranged symmetrically, so that the magnetic field distribution of the first magnetic gap 11 and the second magnetic gap 12 is highly consistent, the force on the two voice coils is balanced, and the vibration synchronization is better. This improves magnetic circuit efficiency, simplifies the structure, and ensures stable acoustic performance.

[0056] Optionally, such as Figures 3 to 6 , Figure 9 , Figure 11 , Figures 12 to 14 , Figure 16 and Figure 17As shown, the magnetic circuit system 1 also includes a magnetically conductive component 18, which is disposed within the assembly gap 13. The magnetically conductive component 18 includes a magnetically conductive body 181 and a receiving space 182 disposed within the magnetically conductive body 181. The main body 245, the first vibrating arm 243, and the second vibrating arm 244 are located within the receiving space 182.

[0057] Specifically, in this embodiment, a magnetically conductive component 18 is added to the assembly gap 13 between the two central magnetic parts. The magnetically conductive component 18 has its own receiving space 182, in which the main body 245 of the centering support 24 and the two vibrating arms are all housed, achieving both magnetic field optimization and structural assembly effects. The magnetically conductive component 18 fills the assembly gap 13, which on the one hand connects the first central magnetic part 15 and the second central magnetic part 16 on both sides, gathers and disperses magnetic field lines, reduces magnetic leakage in the middle area of ​​the magnetic circuit, increases the magnetic field strength of the two magnetic gaps, enhances the driving force of the dual voice coils, and improves the sound volume and low-frequency performance; on the other hand, its own receiving space 182 can accommodate the related structures of the limiting centering support 24, constraining the support from lateral displacement and preventing it from rubbing against the magnet during vibration. Simultaneously, it fully utilizes the internal space of the assembly gap 13, without occupying additional space in the entire machine, maintaining the product's slim profile.

[0058] In this embodiment, the magnetically conductive component 18 can be integrally formed with the magnetically conductive yoke 14, or it can be a separate structure from the magnetically conductive yoke 14. The integrally formed magnetically conductive component 18 can simultaneously achieve the two functions of magnetic conduction and positioning, eliminating the need for independent positioning parts, simplifying the assembly process, improving the uniformity of the magnetic field on both sides, and making the vibration force of the dual voice coils more balanced, thus taking into account the requirements of acoustic performance, structural stability and ultra-thin design.

[0059] In some embodiments, the magnetic conductive component 18 in the assembly gap 13 can be replaced with an independent magnet. After replacement, the magnet can serve as an intermediate magnetic source to further enhance the magnetic field strength of the magnetic gaps on both sides and improve the voice coil driving efficiency to a greater extent. At the same time, the magnet's own outline can still form a space 182 to limit and center the support plate 24, retaining the basic functions of limiting and saving space. Only the magnetic field supply method is changed, which is suitable for high-power sound generation device scenarios with higher requirements for magnetic force strength.

[0060] Optionally, such as Figure 11 and Figure 17 As shown, the magnetic conductive body 181 includes a horizontally extending first plate portion 183 and two second plate portions 184 disposed at both ends of the first plate portion 183 in a first direction. The two second plate portions 184 extend along a second direction, and the first plate portion 183 and the two second plate portions 184 together form an accommodating space 182.

[0061] Specifically, in this embodiment, the magnetically conductive body 181 is enclosed by a first plate 183 arranged laterally and two second plates 184 extending along the thickness direction at both ends to form a receiving space 182, forming an overall U-shaped structure. This structure can simultaneously achieve multiple effects such as magnetic concentrating, limiting protection, and spatial adaptation. The two second plates 184 are integrally formed with the first plate 183, eliminating the need for additional splicing parts, resulting in a simple structure and lower processing and assembly difficulty. The enclosed receiving space 182 perfectly accommodates the main body 245 of the centering support plate 24, the first vibration arm 243, and the second vibration arm 244. The second plates 184 on both sides can limit and constrain the centering support plate 24 from the first direction, preventing the centering support plate 24 from shifting left or right during vibration, eliminating friction with surrounding magnets, and improving vibration stability.

[0062] Meanwhile, the U-shaped magnetic conductor 181 can gather and conduct the magnetic field lines of the first central magnetic part 15 and the second central magnetic part 16 on both sides, reducing magnetic leakage inside the assembly gap 13, increasing the magnetic induction intensity of the magnetic gap, and enhancing the voice coil driving force. The structure of this magnetic conductor 181 fits perfectly with the assembly gap 13 in the middle of the dual central magnetic parts, without occupying any additional axial thickness, fully adapting to the requirements of lightweight and thin sound-generating devices, and achieving a balance between optimizing magnetic field efficiency, protecting the centering support 24, and simplifying the structure.

[0063] Optionally, such as Figure 11 As shown, the magnetic conductive component 18 and the magnetic conductive yoke 14 are integrally formed; and / or, the extension length of the second plate portion 184 along the third direction is greater than the extension length of the first plate portion 183 along the third direction; and / or, the first plate portion 183 and the two second plate portions 184 are integrally formed.

[0064] Specifically, in this embodiment, the magnetic conductive component 18 and the magnetic conductive yoke 14 are set as an integrally molded structure, which can eliminate the process of separately molding and processing the magnetic conductive component 18 and the magnetic conductive yoke 14, reduce the types of parts, and significantly reduce the production costs of mold development and material management. In addition, there is no assembly gap between the two, and the magnetic field lines can be continuously and smoothly conducted between the magnetic conductive yoke 14 and the magnetic conductive component 18, eliminating the magnetic leakage loss caused by the splicing gap, effectively improving the magnetic field utilization rate of the overall magnetic circuit, strengthening the magnetic induction intensity of the two magnetic gaps, enhancing the voice coil driving force, and improving the loudness and low-frequency performance of the sound-generating device.

[0065] Meanwhile, the integrated structure eliminates the need for additional adhesive or positioning structures, and simplifies the assembly process by eliminating the need for aligning and bonding the magnetic conductive components 18 during assembly. This avoids defects such as adhesive deviation and glue overflow, thereby improving product yield. Furthermore, the integrated structure is completely housed within the assembly gap 13 between the two central magnets, without adding any extra thickness to the overall device. This optimizes magnetic circuit efficiency, simplifies the production process, and continuously adapts to the design requirements of ultra-thin sound-generating devices.

[0066] In one embodiment, the extension length of the second plate portion 184 along a third direction exceeds the extension length of the first plate portion 183, which can provide all-round limiting protection for the centering support piece 24, while further optimizing the magnetic circuit convergence effect. The longer second plate portion 184 can completely wrap around the main body portion 245 of the centering support piece 24 and the two vibrating arms along a third direction, forming a shielding and limiting effect from both sides, effectively restricting the centering support piece 24 from shifting or warping along a third direction during vibration, avoiding friction and scratching between the support piece and the central magnetic parts on both sides, greatly reducing device vibration distortion, and extending the service life of the centering support piece 24.

[0067] Meanwhile, the extended second plate 184 can also widen the magnetic field conduction range, better connect the central magnetic parts on both sides, gather the scattered magnetic field lines in the gap, further reduce magnetic leakage, and improve the uniformity of the magnetic field in the magnetic gap. This size design makes full use of the idle space inside the assembly gap 13. The extended section is completely accommodated in the middle gap of the magnet and will not occupy the space in the thickness direction of the whole machine. Without increasing the thickness of the product, it simultaneously strengthens the support limit protection and magnetic circuit conduction performance.

[0068] In one embodiment, the first plate 183 and the two second plates 184 on both sides are integrally formed, which makes the overall structure more rigid and less prone to deformation and cracking under vibration. It can maintain the regular outline of the accommodating space 182 for a long time and continuously limit the centering support 24. It also eliminates the steps of bonding and snap-fit ​​assembly between the plates, reduces the assembly process, avoids the risk of structural failure caused by glue aging and snap-fit ​​loosening, and improves the long-term reliability of the product.

[0069] The seamlessly connected plates allow for lossless transmission of magnetic field lines between the first plate 183 and the second plate 184. The enclosed structure provides higher magnetic conductivity and effectively gathers the magnetic force of the magnets on both sides, enhancing the magnetic gap driving capability. The integrated U-shaped component can be directly embedded into the assembly gap 13 between the two central magnets, simplifying assembly and alignment. The compact structure does not occupy additional space, balancing structural robustness, excellent magnetic performance, and the need for a slim and lightweight design.

[0070] Optionally, such as Figure 8 , Figure 9 and Figure 17 As shown, the magnetic yoke 14 has a clearance gap 143 located between the two side magnetic parts 17, and the first pad 246 and the second pad 247 are respectively located inside the clearance gap 143 and exposed.

[0071] Specifically, in this embodiment, a clearance gap 143 is opened in the middle area of ​​the two side magnetic parts 17 corresponding to the magnetic yoke 14. The first pad 246 and the second pad 247 of the centering support piece 24 are arranged inside the clearance gap 143 and exposed. On the one hand, the clearance gap 143 can be formed by relying on the space of the magnetic yoke 14 itself, without the need to thicken or widen the overall structure. The pads are embedded in the gap inside the magnetic circuit and will not occupy additional space in the thickness and width directions of the device, thus ensuring the thin and light design of the sound-generating device. On the other hand, the first pad 246 and the second pad 247 are completely exposed in the clearance gap 143. The external FPCB 4 can directly extend into the gap to dock and weld with the first pad 246 and the second pad 247. The welding operation space is sufficient, which facilitates automated spot welding operations, reduces the difficulty of assembly alignment, effectively reduces poor soldering and missing soldering, and improves production yield.

[0072] Meanwhile, the clearance 143 is only opened in the middle of the two magnetic parts 17, and the other complete area of ​​the magnetic yoke 14 can still normally gather the magnetic lines of force, without significantly weakening the magnetic circuit conduction efficiency. It takes into account the convenience of circuit soldering and the magnetic field performance of the magnetic circuit, and optimizes the circuit assembly process without sacrificing acoustic performance or increasing the overall size.

[0073] Optionally, such as Figure 8 and Figure 9 As shown, the magnetic yoke 14 includes a support portion 144 located between two side magnetic portions 17. One end of the support portion 144 is connected to the body portion of the magnetic yoke 14, and the other end of the support portion 144 extends along a second direction and is supported on a portion of the first pad 246 and a portion of the second pad 247. The clearance gap 143 is located on the outer side of the support portion 144 in a third direction.

[0074] Specifically, in this embodiment, the support part 144 directly supports and limits the first pad 246 and the second pad 247, preventing the pads from being suspended and bent or the circuit from breaking when the centering support piece 24 is pulled by vibration, thus improving the durability of the circuit structure. The position of the pads is not easily shifted during vibration, ensuring stable transmission of electrical signals. The support part 144 and the magnetic yoke 14 are integrally formed, eliminating the need for additional support pads, reducing component stacking, and not increasing the overall thickness, thus meeting the requirements of ultra-thin devices.

[0075] Meanwhile, the clearance gap 143 is located on the outside of the support portion 144, allowing most of the area of ​​the first solder pad 246 and the second solder pad 247 to be exposed within the clearance gap 143. The external flexible circuit board can be inserted from the side to complete the soldering, providing ample operating space, reducing assembly difficulty, and lowering the rate of cold solder joints and desoldering defects. At the same time, the support portion 144 retains the complete magnetic conduction path of the magnetic yoke 14, without significantly interrupting the magnetic field lines, effectively controlling magnetic leakage, and maintaining the magnetic field strength of the magnetic gap. While stabilizing the solder pad structure and optimizing the assembly process, it also takes into account the acoustic performance of the sound-generating device and the miniaturized design, resulting in a compact and reliable overall structure.

[0076] Optionally, such as Figure 9 and Figure 10 As shown, the vibration assembly 2 also includes a support frame 25, one end of which is connected to the centering support plate 24, and the other end of which extends along the second direction and is connected to the diaphragm assembly 23.

[0077] Specifically, in this embodiment, a support frame 25 is added to connect the centering support plate 24 and the diaphragm assembly 23. The support frame 25 extends along the thickness direction to form a rigid force transmission structure, which can evenly distribute the stress generated by the vibration of the diaphragm 231, avoid local stress concentration and breakage of the centering support plate 24, and improve the service life of the sound-generating device. The support frame 25 connects the diaphragm 231 and the centering support plate 24, constraining them to vibrate synchronously along the second direction, suppressing diaphragm 231 skewing and voice coil magnetization, and reducing sound distortion. At the same time, the support frame 25 transmits force independently, reducing the load on the centering support plate 24, allowing the centering support plate 24 to be designed to be thinner and lighter, which is beneficial for the overall ultra-thin design.

[0078] Optionally, such as Figure 9 and Figure 10 As shown, the support frame 25 includes a first support member 251 extending along a second direction and a second support member 252 extending along a first direction. One end of the first support member 251 is connected to the main body 245, and the other end of the first support member 251 is connected to the second support member 252. The second support member 252 is fixed to the diaphragm assembly 23.

[0079] Specifically, in this embodiment, the first support member 251 transmits the vibration of the diaphragm assembly 23 along the vibration direction, and the second support member 252 distributes the force laterally. The two work together to evenly disperse the stress generated by the vibration, avoid local stress concentration and cracking of the main body 245 of the centering support 24, and improve the overall structural durability. In addition, the segmented structure can precisely limit the diaphragm assembly 23 and the centering support 24, ensuring that the two vibrate synchronously along the second direction, reducing voice coil offset and magnetization, and reducing sound distortion.

[0080] Optionally, there are two support frames 25, which are spaced apart along a third direction. Along the first direction, the second support members 252 of the two support frames 25 extend in opposite directions.

[0081] Specifically, in this embodiment, two sets of support frames 25 arranged at intervals along a third direction and extending in opposite directions of the second support member 252 can symmetrically and evenly distribute the stress generated by the vibration of the diaphragm assembly 23, prevent the diaphragm assembly 23 from being tilted on one side, constrain the diaphragm assembly 23 and the centering support 24 to vibrate smoothly only along the second direction, reduce voice coil offset magnetization, and reduce sound distortion; the bidirectionally opposite arrangement of the second support member 252 can form bidirectional tensile limit, improve vibration synchronization and structural fatigue resistance, and the double support frame 25 disperses the force, extending the service life of the device. At the same time, the overall layout does not increase the size of the whole machine, combining vibration stability and product thinness.

[0082] Optionally, such as Figure 9 and Figure 10 As shown, the support frame 25 includes a first support member 251 and two second support members 252. Each second support member 252 is connected to the end of the first support member 251 away from the main body 245, and the two second support members 252 are spaced apart along a third direction. Along the first direction, the two support frames 25 extend in opposite directions.

[0083] Specifically, in this embodiment, a single first support member 251 is paired with two second support members 252 arranged in opposite directions and at intervals. The integrated structure can synchronously disperse the vibration stress of the diaphragm 231 to both sides, resulting in uniform and symmetrical force distribution. This effectively avoids unilateral swaying of the diaphragm assembly 23 and distortion caused by magnetizing the voice coil. The two second support members 252 form a bidirectional limiting constraint, resulting in better vibration synchronization, reducing the risk of fatigue fracture at a single connection point, and improving structural durability. The integrated support frame 25 reduces the number of parts, simplifies assembly, occupies less space, and does not increase the overall thickness of the device, thus combining good vibration stability, service life, and lightweight design of components.

[0084] According to a second aspect of this application, an electronic device is provided, comprising: the sound-emitting device of the first aspect.

[0085] Specifically, in this embodiment, the electronic device equipped with the sound-generating device of the first aspect of this application, relying on the design of dual magnetic gaps, built-in retractable centering support 24, and integrated magnetic guiding structure, not only possesses stronger dual voice coil driving force, a wider frequency response range, higher low-frequency loudness, and lower vibration distortion, making the external sound quality of the electronic device clear and full; it can also compress the stacking thickness of the sound-generating device, reduce the space occupied inside the device, and reserve more layout space for other components such as batteries and motherboards inside the electronic device, facilitating the thinning and lightening of the device. At the same time, the sound-generating device has a stable structure and a high assembly yield, reducing the difficulty of assembling the entire electronic device, reducing distortion and noise failures during long-term use, improving the acoustic user experience and overall durability of the electronic device, and adapting to various consumer electronic terminals such as mobile phones and tablets that pursue a thin and light body.

[0086] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A sound-generating device, characterized in that, include: A magnetic circuit system having a first magnetic gap and a second magnetic gap arranged side-by-side along a first direction, the first magnetic gap and the second magnetic gap being spaced apart to form an assembly gap extending along a third direction; A vibration assembly is disposed on one side of the magnetic circuit system and vibrates along a second direction. The vibration assembly includes a diaphragm assembly, a first voice coil, and a second voice coil. The first voice coil and the second voice coil are respectively disposed on the side of the diaphragm assembly close to the magnetic circuit system. The side of the first voice coil away from the diaphragm assembly is corresponding to the first magnetic gap. The side of the second voice coil away from the diaphragm assembly is corresponding to the second magnetic gap. The vibration assembly further includes a centering support plate, which includes a main body portion located within the assembly gap, a first connecting arm and a second connecting arm extending relative to the main body portion along the first direction, and a first vibration arm and a second vibration arm extending relative to both ends of the main body portion along a third direction, respectively. The first connecting arm and the second connecting arm are electrically connected to the first voice coil and the second voice coil, respectively, and are fixed to the diaphragm assembly. The first vibrating arm and the second vibrating arm are both housed in the assembly gap, and the end of the first vibrating arm away from the main body is provided with a first pad and a second pad that are electrically connected to the first vibrating arm and the second vibrating arm. Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

2. The sound-generating device according to claim 1, characterized in that, The first vibrating arm and the second vibrating arm are in the same plane in the second direction and extend meanderingly along the third direction, respectively.

3. The sound-generating device according to claim 1, characterized in that, The first connecting arm includes a first support segment extending along the second direction and a first connecting segment extending along the first direction. A first end of the first support segment is connected to the main body, a second end of the first support segment is connected to the first end of the first connecting segment, and the second end of the first connecting segment is electrically connected to the first voice coil. And / or, the second connecting arm includes a second support segment extending along the second direction and a second connecting segment extending along the first direction, a first end of the second support segment being connected to the main body, a second end of the second support segment being connected to the first end of the second connecting segment, and a second end of the second connecting segment being electrically connected to the second voice coil.

4. The sound-generating device according to claim 1, characterized in that, The magnetic circuit system includes a magnetic yoke, a first central magnetic section, a second central magnetic section, and two side magnetic sections; The first central magnetic part and the second central magnetic part are arranged side by side and spaced apart along the first direction on the magnetic yoke. The assembly gap is located between the first central magnetic part and the second central magnetic part. The two side magnetic parts are arranged outside the first central magnetic part and the second central magnetic part and are spaced apart from the first central magnetic part and the second central magnetic part, respectively.

5. The sound-generating device according to claim 4, characterized in that, The magnetic yoke is bent at both sides along the first direction toward the vibration assembly to form a first bent portion and a second bent portion. The first bent portion and the first central magnetic portion are spaced apart to form a portion of the first magnetic gap, and the second bent portion and the second central magnetic portion are spaced apart to form a portion of the second magnetic gap.

6. The sound-generating device according to claim 4, characterized in that, The magnetic circuit system further includes a magnetically conductive component, which is disposed within the assembly gap. The magnetically conductive component includes a magnetically conductive body and a receiving space disposed within the magnetically conductive body. The body, the first vibrating arm, and the second vibrating arm are located within the receiving space.

7. The sound-generating device according to claim 6, characterized in that, The magnetically conductive body includes a horizontally extending first plate portion and two second plate portions disposed at both ends of the first plate portion in the first direction. The two second plate portions extend along the second direction, and the first plate portion and the two second plate portions together form the accommodating space.

8. The sound-generating device according to claim 7, characterized in that, The magnetically conductive component and the magnetically conductive yoke are integrally formed. And / or, the extension length of the second plate portion along the third direction is greater than the extension length of the first plate portion along the third direction; And / or, the first plate portion and the two second plate portions are formed as an integrally molded structure.

9. The sound-generating device according to claim 4, characterized in that, The magnetic yoke is provided with a clearance gap between the two side magnetic parts, and the first pad and the second pad are respectively exposed within the clearance gap.

10. The sound-generating device according to claim 9, characterized in that, The magnetic yoke includes a support portion located between the two side magnetic portions. One end of the support portion is connected to the body portion of the magnetic yoke, and the other end of the support portion extends along the second direction and is supported on a portion of the first pad and a portion of the second pad. The clearance gap is located outside the third direction of the support portion.

11. The sound-generating device according to any one of claims 1-10, characterized in that, The vibration assembly also includes a support frame, one end of which is connected to the centering support plate, and the other end of which extends along the second direction and is connected to the diaphragm assembly.

12. The sound-generating device according to claim 11, characterized in that, The support frame includes a first support member extending along the second direction and a second support member extending along the first direction. One end of the first support member is connected to the main body, and the other end of the first support member is connected to the second support member. The second support member is fixed to the diaphragm assembly. And / or, there are two support frames, which are spaced apart along the third direction, and the second support members of the two support frames extend in opposite directions along the first direction; And / or, the support frame includes one first support member and two second support members, each second support member being connected to the end of the first support member away from the main body, and the two second support members being spaced apart along the third direction, and the two support frames extending in opposite directions along the first direction.

13. An electronic device, characterized in that, include: The sound-generating device according to any one of claims 1-12.

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