Sound production device and electronic device

Abstract

The present application relates to a kind of sound production device and electronic equipment, sound production device includes: shell, the first vibration component connected with one end of shell, the second vibration component connected with the other end of shell, magnetic circuit system is arranged between first vibration component and second vibration component.First vibration component includes first diaphragm, first voice coil component, first spring wave, one side of first spring wave is connected with first voice coil component, the other side is connected with shell;Second vibration component includes second diaphragm, second voice coil component, second spring wave, one side of second spring wave is connected with second voice coil component, the other side is connected with shell, at least one of first vibration component and second vibration component still includes centering support, the inside of centering support is connected with corresponding voice coil component, outside is connected with shell.The sound production device of the present application effectively avoids the fatigue fracture of lead solder joint, improves the durability, while improving the vibration stability of vibration component, improves acoustic performance.

Description

Technical Field

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

[0002] A sound-generating device is a transducer that converts electrical signals into sound signals. It is widely used in electronic devices such as mobile phones, tablets, laptops, smart speakers, and car audio systems.

[0003] The spider is a key elastic component in a sound-generating device. One end connects to the voice coil assembly, and the other end connects to the housing. The spider serves to center and support the voice coil during vibration, preventing it from becoming polarized in a direction other than vibration and ensuring that the voice coil moves axially. However, under conditions such as large amplitude vibration of the voice coil assembly or other factors, the spider is prone to tearing. Summary of the Invention

[0004] One object of the present invention is to provide a new technical solution for a sound-generating device and an electronic device.

[0005] According to one aspect of this disclosure, a sound-generating device is provided, comprising: shell; A vibration system includes a first vibration component and a second vibration component. The first vibration component includes a first diaphragm connected to one end of the housing. The second vibration component includes a second diaphragm connected to the other end of the housing. A magnetic circuit system is connected to the outer shell and located between the first vibration component and the second vibration component. The magnetic circuit system includes a magnetic cup, a central magnetic component, and a side magnetic component. The magnetic cup includes an inner magnetic guide plate, a side magnetic guide plate, and an outer magnetic guide plate. The inner magnetic guide plate is connected to the inner wall of one end of the side magnetic guide plate, and the outer magnetic guide plate is connected to the outer wall of the other end of the side magnetic guide plate. The central magnetic component is disposed on the inner magnetic guide plate and is located inside the side magnetic guide plate, forming a first magnetic gap between the central magnetic component and the side magnetic guide plate. The side magnetic component is disposed on the outer magnetic guide plate and is located outside the side magnetic guide plate, forming a second magnetic gap between the side magnetic guide plate and the side magnetic guide plate. The first vibration assembly further includes a first voice coil assembly and a first spider. One end of the first voice coil assembly is connected to the first diaphragm, and the other end is located within the first magnetic gap. The inner side of the first spider is connected to the first voice coil assembly, and the outer side of the first spider is connected to the outer shell. The second vibration assembly further includes a second voice coil assembly and a second spider. One end of the second voice coil assembly is connected to the second diaphragm, and the other end is located within the second magnetic gap. The inner side of the second spider is connected to the second voice coil assembly, and the outer side of the second spider is connected to the outer shell. A second centering support is disposed on the second spider. One end of the second centering support is connected to the second voice coil assembly, and the other end of the second centering support is connected to the outer shell. At least one of the first vibration assembly and the second vibration assembly further includes a centering support. The inner side of the centering support is connected to the corresponding voice coil assembly, and the outer side of the centering support is connected to the outer shell.

[0006] Optionally, the first vibration assembly further includes a first centering support; the first spring includes a first outer connecting part, a first inner connecting part, and a first deformable part; the first outer connecting part is connected to the outer shell; the first inner connecting part is connected to the first voice coil assembly; and the first deformable part connects the first outer connecting part and the first inner connecting part. The first centering support includes a first outer fixing part, a first inner fixing part, and a first elastic arm; the first outer fixing part is connected to the outer shell; the first inner fixing part is connected to the first voice coil assembly; and the first elastic arm connects the first outer fixing part and the first inner fixing part; the first deformable part and the first elastic arm are sequentially staggered. And / or, The second vibration assembly further includes a second centering support plate. The second spring includes a second outer connecting part, a second inner connecting part, and a second deformation part. The second outer connecting part is connected to the outer shell, the second inner connecting part is connected to the second voice coil assembly, and the second deformation part connects the second outer connecting part and the second inner connecting part. The second centering support plate includes a second outer fixing part, a second inner fixing part, and a second elastic arm. The second outer fixing part is connected to the outer shell, the second inner fixing part is connected to the second voice coil assembly, and the second elastic arm connects the second outer fixing part and the second inner fixing part. The second deformation part and the second elastic arm are arranged alternately in sequence.

[0007] Optionally, the central magnetic assembly includes a central magnet and a first magnetic guide plate, with one end of the central magnet connected to the first magnetic guide plate and the other end of the central magnet connected to the inner magnetic guide plate.

[0008] Optionally, the edge magnet assembly includes an edge magnet and an edge magnetic guide plate. The edge magnet is disposed outside the edge magnetic guide plate, located between the outer magnetic guide plate and the edge magnetic guide plate. The magnetization direction of the edge magnet is opposite to that of the central magnet; and / or, The central magnetic assembly further includes a second magnetic guide plate, which is disposed between the central magnet and the inner magnetic guide plate.

[0009] Optionally, the central magnetic assembly further includes a second magnetic guide plate, which is disposed between the central magnet and the inner magnetic guide plate, wherein the axial thickness of the first magnetic guide plate is greater than the axial thickness of the second magnetic guide plate.

[0010] Optionally, the housing includes a first housing and a second housing, the first vibration component is connected to the first housing, the second vibration component is connected to the second housing, and the magnetic circuit system is located between the first housing and the second housing.

[0011] Optionally, the first vibration assembly further includes a first centering support, the inner side of the first spring and the first centering support is connected to the first frame of the first voice coil assembly, and the outer side of the first spring and the first centering support is connected to the first housing; and / or, The second vibration assembly further includes a second centering support plate, the inner side of the second spring and the second centering support plate is connected to the second frame of the second voice coil assembly, and the outer side of the second spring and the second centering support plate is connected to the second housing.

[0012] Optionally, the housing further includes connectors, a plurality of which connect the first housing and the second housing.

[0013] Optionally, the first housing is provided with a first protrusion, the second housing is provided with a second protrusion, the first protrusion and the second protrusion are arranged opposite to each other, one end of the connector is connected to the first protrusion, and the other end of the connector is connected to the second protrusion.

[0014] Optionally, the magnetic circuit system further includes a first short-circuit ring disposed outside the central magnetic assembly; and / or, The magnetic circuit system further includes a second short-circuit ring, which is disposed on the outside of the side magnetic plate and / or the inner magnetic plate.

[0015] According to a second aspect of this disclosure, an electronic device is provided, including the sound-generating device described in this disclosure.

[0016] In this embodiment, the magnetic cup, the central magnetic assembly, and the side magnetic assembly form two opposing magnetic gaps, a first magnetic gap and a second magnetic gap, reducing the thickness of the sound-generating device. By providing a first spring, a second spring, and a centering support corresponding to at least one of the first and second vibration assemblies, the centering support, in conjunction with the first or second spring, constrains the axial movement of the first or second voice coil assembly, improving the operational stability of the first or second voice coil assembly. Simultaneously, the centering support is used to transmit electrical signals, establishing a static electrical reference point and mechanical constraint boundary to ensure stable signal transmission. The sound-generating device of this disclosure effectively avoids fatigue fracture of the voice coil lead solder joints, significantly improving durability under high power; furthermore, the deformations of the spring and the centering support do not interfere with each other, ensuring the operational stability of the voice coil assembly, achieving a compact design and high-fidelity electroacoustic performance.

[0017] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which form part of this specification, illustrate embodiments of the invention and, together with the specification, serve to explain the principles of the invention.

[0019] Figure 1 This is a schematic diagram of the overall structure of the sound-generating device according to an embodiment of the present disclosure.

[0020] Figure 2 This is an exploded view of a sound-generating device according to an embodiment of this disclosure.

[0021] Figure 3 This is a cross-sectional view of a sound-generating device according to an embodiment of the present disclosure.

[0022] Figure 4 This is a partial structural schematic diagram of the vibration system according to an embodiment of the present disclosure.

[0023] Figure 5 This is a schematic diagram showing the cooperation of the second voice coil assembly, the second spring wave, and the second centering support in an embodiment of this disclosure.

[0024] Explanation of reference numerals in the attached figures: 100. Outer shell; 101. First shell; 102. Second shell; 103. Connector; 104. First protrusion; 105. Second protrusion; 200. Vibration system; 201. First vibration assembly; 2011. First diaphragm; 2012. First voice coil assembly; 2013. First spider; 2014. First centering support; 2015. First frame; 2016. First voice coil; 2017. First external connecting part; 2018. First internal connecting part; 2019. First deformable part; 2020. First external fixing part; 2021. First internal fixing part; 2022. First elastic arm; 203. Second vibration assembly; 2031. Second diaphragm; 2032. Second voice coil assembly; 2033. 2034. Second spring wave; 2035. Second centering support; 2036. Second frame; 2037. Second voice coil; 2038. Second outer connecting part; 2039. Second inner connecting part; 2040. Second deformable part; 2041. Second outer fixing part; 2042. Second inner fixing part; 2043. Second elastic arm; 300. Magnetic circuit system; 301. Magnetic cup; 3011. Inner magnetic guide plate; 3012. Side magnetic guide plate; 3013. Outer magnetic guide plate; 302. Central magnetic assembly; 3021. Central magnet; 3022. First magnetic guide plate; 3023. Second magnetic guide plate; 303. Side magnetic assembly; 3031. Side magnet; 3032. Side magnetic guide plate; 304. First short-circuit ring; 305. Second short-circuit ring. Detailed Implementation

[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0026] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0027] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0028] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0030] The technical solutions provided by the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0031] In related technologies, a sound-generating device is a device that converts electrical energy into sound energy to produce sound. The sound-generating device in this disclosure is a double-sided sound-generating structure, which contains two sets of voice coil assemblies that share a common magnetic circuit system. According to Lorentz's law, the permanent magnet interacts with the voice coil, driving the diaphragm to vibrate and produce sound.

[0032] The sound-generating device provided in this embodiment includes a housing, a first vibration component and a second vibration component disposed within the housing, and a magnetic circuit system disposed between the first vibration component and the second vibration component. A central magnetic component is disposed within a magnetic cup, forming a first magnetic gap between the central magnetic component and the magnetic cup. A side magnetic component is disposed outside a side magnetic guide plate of the magnetic cup, forming a second magnetic gap between the side magnetic component and the magnetic cup. The first and second magnetic gaps face opposite directions, reducing the thickness of the sound-generating device. One side of a first spring is connected to a first voice coil assembly, and the other side of the first spring is connected to the housing; one side of a second spring is connected to a second voice coil assembly, and the other side of the second spring is connected to the housing. At least one of the first and second vibration components further includes a centering support plate, the inner side of which is connected to the voice coil assembly of the corresponding vibration component, and the outer side of which is connected to the housing. The first and second springs, along with the centering support, work together to constrain the axial movement of the first and / or second voice coil assemblies. The first and second springs, along with the centering support, absorb vibration energy through deformation, improving the stability of the first or second voice coil assembly. At the same time, the centering support is used to transmit electrical signals, effectively preventing fatigue fracture of the voice coil lead solder joints and significantly improving durability under high power. Furthermore, the deformations of the springs and the centering support do not interfere with each other, ensuring the operational stability of the voice coil assembly and achieving a compact design and high-fidelity electroacoustic performance.

[0033] This disclosure provides a sound-generating device. The sound-generating device includes: Casing 100; Vibration system 200 includes a first vibration component 201 and a second vibration component 203. The first vibration component 201 includes a first diaphragm 2011, which is connected to one end of the housing 100. The second vibration component 203 includes a second diaphragm 2031, which is connected to the other end of the housing 100. A magnetic circuit system 300 is connected to the outer shell 100 and located between the first vibration component 201 and the second vibration component 203. The magnetic circuit system 300 includes a magnetic bowl 301, a central magnetic component 302, and a side magnetic component 303. The magnetic bowl 301 includes an inner magnetic plate 3011, a side magnetic plate 3012, and an outer magnetic plate 3013. The inner magnetic plate 3011 is connected to the inner wall of one end of the side magnetic plate 3012, and the outer magnetic plate 3013 is connected to the outer wall of the other end of the side magnetic plate 3012. The central magnetic component 302 is disposed on the inner magnetic plate 3011 and is located inside the side magnetic plate 3012, forming a first magnetic gap between the central magnetic component 3012 and the side magnetic component 303. The side magnetic component 303 is disposed on the outer magnetic plate 3013 and is located outside the side magnetic plate 3012, forming a second magnetic gap between the side magnetic plate 3012 and the side magnetic component 3012. The first vibration component 201 also includes a first voice coil component 2012 and a first spider 2013. One end of the first voice coil component 2012 is connected to the first diaphragm 2011, and the other end is located in the first magnetic gap. The inner side of the first spider 2013 is connected to the first voice coil component 2012, and the outer side of the first spider 2013 is connected to the outer shell 100. The second vibration assembly 203 further includes a second voice coil assembly 2032 and a second spider 2033. One end of the second voice coil assembly 2032 is connected to the second diaphragm 2031, and the other end is located in the second magnetic gap. The inner side of the second spider 2033 is connected to the second voice coil assembly 2032, and the outer side of the second spider 2033 is connected to the outer shell 100. At least one of the first vibration assembly 201 and the second vibration assembly 203 further includes a centering support. The inner side of the centering support is connected to the voice coil assembly of the corresponding vibration assembly, and the outer side of the centering support is connected to the outer shell 100.

[0034] like Figure 1 As shown, the sound-generating device includes a housing 100, a vibration system 200, and a magnetic circuit system 300, which are installed inside the housing 100. The housing 100 provides support and mounting space for the vibration system 200 and the magnetic circuit system 300, and protects the internal components. When energized, the vibration system 200 experiences mechanical vibration in a magnetic field, which is then converted into sound waves. The magnetic circuit system 300 provides a stable magnetic field for the vibration system 200, driving it to vibrate and generate sound.

[0035] like Figure 1 and Figure 2As shown, the vibration system 200 includes a first vibration component 201 and a second vibration component 203. The first vibration component 201 is connected to one end of the housing 100, and the second vibration component 203 is connected to the other end of the housing 100. A magnetic circuit system 300 is disposed between the first vibration component 201 and the second vibration component 203 and is connected to the housing 100. The first vibration component 201 and the second vibration component 203 share the magnetic circuit system 300, which drives the first vibration component 201 and the second vibration component 203 to vibrate.

[0036] like Figure 2 and Figure 3 As shown, the magnetic circuit system 300 includes a magnetic bowl 301, a central magnetic component 302, and a side magnetic component 303. The central magnetic component 302 is disposed inside the magnetic bowl 301, and the side magnetic component 303 is disposed outside the magnetic bowl 301. A first magnetic gap is formed between the magnetic bowl 301 and the central magnetic component 302, and a second magnetic gap is formed between the side magnetic component 303 and the magnetic bowl 301. The magnetic bowl 301 is a bowl-shaped magnetic conductive plate that can guide and concentrate the magnetic field. The magnetic bowl 301, the central magnetic component 302, and the side magnetic component 303 form the first and second magnetic gaps facing opposite directions, reducing the thickness of the sound-generating device. The central magnetic component 302 and the side magnetic component 303 include permanent magnets. The permanent magnets of the central magnetic component 302 and the side magnetic component 303 are magnetized in opposite directions. The central magnetic component 302, the side magnetic component 303, and the magnetic bowl 301 together provide a stable magnetic field for the first and second magnetic gaps.

[0037] like Figure 3 As shown, the magnetic bowl 301 includes an inner magnetic plate 3011, a side magnetic plate 3012, and an outer magnetic plate 3013. The magnetic bowl 301 is made of a magnetically conductive material, such as low-carbon steel. The side magnetic plate 3012 is annular. The inner magnetic plate 3011 is connected to the inner wall of one end of the side magnetic plate 3012, and the outer magnetic plate 3013 is connected to the outer wall of the other end of the side magnetic plate 3012. The inner magnetic plate 3011 and the outer magnetic plate 3013 are located on different horizontal planes.

[0038] The first vibration component 201 and the second vibration component 203 cooperate with the magnetic circuit system 300 to generate mechanical vibration. For example, the first vibration component 201 and the second vibration component 203 simultaneously move away from and towards the magnetic circuit system 300, converting electrical energy into sound energy.

[0039] like Figure 3 and Figure 4As shown, the first vibration assembly 201 includes a first diaphragm 2011, a first voice coil assembly 2012, and a first spider 2013. The first diaphragm 2011 is connected to the housing 100. One end of the first voice coil assembly 2012 is connected to the first diaphragm 2011, and the other end of the first voice coil assembly 2012 is located in the first magnetic gap. The first spider 2013 is disposed outside the first voice coil assembly 2012. The inner side of the first spider 2013 is connected to the first voice coil assembly 2012, and the outer side of the first spider 2013 is connected to the housing 100. The outer side of the first spider 2013 and the housing 100 can be directly connected or indirectly connected.

[0040] Upon energization, according to Lorentz's law, the first voice coil assembly 2012 vibrates under force in the first magnetic gap, transmitting the vibration to the first diaphragm 2011. The first diaphragm 2011 then reciprocates, pushing air to generate sound waves. The first spring wave 2013 constrains the axial movement of the first voice coil assembly 2012, thereby improving the stability of the vibration.

[0041] like Figure 3 and Figure 4 As shown, the second vibration assembly 203 includes a second diaphragm 2031, a second voice coil assembly 2032, and a second spider 2033. The second diaphragm 2031 is connected to the housing 100. One end of the second voice coil assembly 2032 is connected to the second diaphragm 2031, and the other end of the second voice coil assembly 2032 is located in the second magnetic gap. The second spider 2033 is disposed on the outside of the second voice coil assembly 2032. The inside of the second spider 2033 is connected to the second voice coil assembly 2032, and the outside of the second spider 2033 is connected to the housing 100. The outside of the second spider 2033 and the housing 100 can be directly connected or indirectly connected.

[0042] When energized, according to Lorentz's law, the second voice coil assembly 2032 vibrates under force in the second magnetic gap and transmits the vibration to the second diaphragm 2031. The second diaphragm 2031 then reciprocates, pushing the air to generate sound waves.

[0043] The second wave 2033 constrains the axial movement of the second voice coil assembly 2032, which can improve the stability of vibration.

[0044] In this embodiment, at least one of the first vibration component 201 and the second vibration component 203 further includes a centering support plate. The inner side of the centering support plate is connected to the corresponding voice coil component, and the outer side of the centering support plate is connected to the outer shell 100. By introducing the centering support plate, the lead wire of the voice coil can be directly soldered to the pad of the centering support plate. Compared with the prior art of soldering the nylon wire to the pad of the voice coil sidewall, the process difficulty is reduced. From another perspective, when the amplitude of the voice coil component is large, the centering support plate is more reliable than the spider and is less likely to cause spider tearing when the spider is used alone.

[0045] In some embodiments of this disclosure, the first vibration assembly 201 further includes a first centering support 2014, and the first spring wave 2013 includes a first outer connecting part 2017, a first inner connecting part 2018, and a first deformation part 2019. The first outer connecting part 2017 is connected to the outer shell 100, the first inner connecting part 2018 is connected to the first voice coil assembly 2012, and the first deformation part 2019 connects the first outer connecting part 2017 and the first inner connecting part 2018. The first centering support 2014 includes a first outer fixing part 2020, a first inner fixing part 2021, and a first elastic arm 2022. The first outer fixing part 2020 is connected to the outer shell 100, the first inner fixing part 2021 is connected to the first voice coil assembly 2012, and the first elastic arm 2022 connects the first outer fixing part 2020 and the first inner fixing part 2021. The first deformation part 2019 and the first elastic arm 2022 are arranged alternately in sequence.

[0046] In some embodiments of this disclosure, the second vibration assembly 203 further includes a second centering support 2034, and the second spring wave 2033 includes a second outer connecting portion 2037, a second inner connecting portion 2038, and a second deformation portion 2039. The second outer connecting portion 2037 is connected to the outer shell 100, the second inner connecting portion 2038 is connected to the second voice coil assembly 2032, and the second deformation portion 2039 connects the second outer connecting portion 2037 and the second inner connecting portion 2038. The second centering support 2034 includes a second outer fixing portion 2040, a second inner fixing portion 2041, and a second elastic arm 2042. The second outer fixing portion 2040 is connected to the outer shell 100, the second inner fixing portion 2041 is connected to the second voice coil assembly 2032, and the second elastic arm 2042 connects the second outer fixing portion 2040 and the second inner fixing portion 2041. The second deformation portion 2039 and the second elastic arm 2042 are arranged alternately in sequence.

[0047] In the embodiments disclosed herein, such as Figure 2As shown, the first vibration assembly 201 also includes a first centering support 2014, the inner side of which is connected to the first voice coil assembly 2012, and the outer side of which is connected to the outer shell 100 or the first spider 2013. Compared to the existing technology that uses the first spring wave 2013 alone, by soldering the nylon wire to the pads on the sidewall of the first voice coil assembly 2012 (specifically the skeleton or coil sidewall), and by introducing the first centering support 2014 (specifically the FPCB), the lead wires of the voice coil of the first voice coil assembly 2012 can be directly soldered to the pads of the first centering support 2014, reducing the difficulty of the process. From another perspective, when the amplitude of the first voice coil assembly 2012 is large, the combination of the first centering support 2014 and the first spring wave 2013 is more reliable than the first spring wave 2013 alone, and is less likely to experience phenomena such as tearing of the first spring wave 2013 when used alone.

[0048] In the embodiments disclosed herein, such as Figure 2 and Figure 4 As shown, the first spring wave 2013 includes a first outer connecting part 2017, a first inner connecting part 2018, and a first deformation part 2019. The first outer connecting part 2017 can be a ring structure or intermittently arranged. The first outer connecting part 2017 is connected to the outer casing 100. The first deformation part 2019 has a wave-shaped structure. The first inner connecting part 2018 is connected to the first voice coil assembly 2012. The first deformation part 2019 connects the first outer connecting part 2017 and the first inner connecting part 2018. A first centering support 2014 is disposed on the first outer connecting part 2017. The first deformation part 2019 and the first centering support 2014 are arranged alternately. The first inner connecting part 2018 moves axially with the first voice coil assembly 2012 and transmits the driving force to the first deformation part 2019. The first deformation part 2019 deforms through its wave-shaped structure to suppress the radial oscillation of the first voice coil assembly 2012. The first external connecting part 2017 serves as a fixed support for the entire first wave 2013. The first external connecting part 2017 is used to bear and absorb excess vibration energy transmitted by the first deformation part 2019 to ensure stability during operation.

[0049] In the embodiments disclosed herein, such as Figure 2 and Figure 4As shown, the first centering support 2014 includes a first outer fixing part 2020, a first inner fixing part 2021, and a first elastic arm 2022. The first outer fixing part 2020 has an arc-shaped structure and is disposed on the first outer connecting part 2017. The first outer fixing part 2020 is connected to the outer shell 100 or the first outer connecting part 2017. The first inner fixing part 2021 has an arc-shaped structure and fits against the first voice coil assembly 2012. The first inner fixing part 2021 is connected to the first voice coil assembly 2012. The first elastic arm 2022 has an S-shaped structure and connects the first outer fixing part 2020 and the first inner fixing part 2021. The first deformable part 2019 and the first elastic arm 2022 are arranged alternately. The first inner fixing part 2021 moves axially with the first voice coil assembly 2012 and transmits the driving force to the first elastic arm 2022. The first elastic arm 2022 deforms through an S-shaped structure to suppress the radial oscillation of the first voice coil assembly 2012. Furthermore, the first elastic arm 2022 remains conductive throughout the vibration process, isolating mechanical stress from being transmitted to the first external fixing part 2020 and preventing breakage of the electrical terminal. The first external fixing part 2020 is connected to the housing 100 to ensure stable transmission of electrical signals.

[0050] In one embodiment, the first external connecting part 2017 is annular, the first external fixing part 2020 is connected to the first external connecting part 2017 and further connected to the outer shell 100, and the first deformable part 2019 and the first elastic arm 2022 are alternately arranged; in another embodiment, the first external connecting part 2017 is discontinuously arranged, that is, the first spring wave 2013 includes two parts, the first spring wave 2013 and the first centering support piece 2014 are alternately arranged, and the first external fixing part 2020 is connected to the outer shell 100.

[0051] In the embodiments disclosed herein, such as Figure 2 As shown, the second vibration assembly 203 also includes a second centering support 2034. The inner side of the second centering support 2034 is connected to the second voice coil assembly 2032, and the outer side of the second centering support 2034 is connected to the housing 100 or the second spider 2033. Compared to the prior art of using the second spider 2033 alone, where the nylon wire is soldered to the pads on the sidewall (specifically the skeleton or coil sidewall) of the second voice coil assembly 2032, by introducing the second centering support 2034 (specifically the FPCB), the leads of the voice coil of the second voice coil assembly 2032 can be directly soldered to the pads of the second centering support 2034, reducing the difficulty of the process. From another perspective, when the amplitude of the second voice coil assembly 2032 is large, the combined use of the second centering support 2034 and the second spider 2033 is more reliable than the use of the second spider 2033 alone, and is less prone to phenomena such as tearing of the second spider 2033 when used alone.

[0052] like Figure 2 and Figure 4 As shown, the second spring coil 2033 includes a second outer connecting portion 2037, a second inner connecting portion 2038, and a second deformation portion 2039. The second outer connecting portion 2037 can be a ring structure or intermittently arranged, and is connected to the housing 100. The second deformation portion 2039 has a wave-shaped structure. The second inner connecting portion 2038 is connected to the second voice coil assembly 2032. The second deformation portion 2039 connects the second outer connecting portion 2037 and the second inner connecting portion 2038. A second centering support 2034 is disposed on the second outer connecting portion 2037, and the second deformation portion 2039 and the second centering support 2034 are arranged alternately. The second inner connecting portion 2038 moves axially with the second voice coil assembly 2032, and transmits the driving force to the second deformation portion 2039. The second deformation portion 2039 deforms through its wave-shaped structure to suppress the radial oscillation of the second voice coil assembly 2032. The second outer connecting part 2037 serves as a fixed support for the entire second wave 2033. The second outer connecting part 2037 is used to bear and absorb excess vibration energy transmitted by the second deformation part 2039 to ensure stability during operation.

[0053] like Figure 2 and Figure 4 As shown, the second centering support 2034 includes a second outer fixing part 2040, a second inner fixing part 2041, and a second elastic arm 2042. The second outer fixing part 2040 has an arc-shaped structure and is disposed on the second outer connecting part 2037. The second outer fixing part 2040 is connected to the outer shell 100 or the second outer connecting part 2037. The second inner fixing part 2041 has an arc-shaped structure and fits against the second voice coil assembly 2032. The second inner fixing part 2041 is connected to the second voice coil assembly 2032. The second elastic arm 2042 has an S-shaped structure and connects the second outer fixing part 2040 and the second inner fixing part 2041. The second deformable part 2039 and the second elastic arm 2042 are arranged alternately. The second inner fixing part 2041 moves axially with the second voice coil assembly 2032 and transmits the driving force to the second elastic arm 2042. The second elastic arm 2042 deforms through an S-shaped structure to suppress the radial oscillation of the second voice coil assembly 2032. Furthermore, the second elastic arm 2042 remains conductive throughout the vibration process, isolating mechanical stress from being transmitted to the second outer fixing part 2040 and preventing breakage of the electrical terminal. The second outer fixing part 2040 is connected to the housing 100 to ensure stable transmission of electrical signals.

[0054] In some embodiments of this disclosure, the central magnetic assembly 302 includes a central magnet 3021 and a first magnetic guide plate 3022, one end of the central magnet 3021 is connected to the first magnetic guide plate 3022, and the other end of the central magnet 3021 is connected to the inner magnetic guide plate 3011.

[0055] In the embodiments disclosed herein, such as Figure 2 and Figure 3 As shown, the central magnetic assembly 302 includes a central magnet 3021 and a first magnetic guide plate 3022. The central magnet 3021 is located inside the side magnetic guide plate 3012 and is connected to the first magnetic guide plate 3022. The first magnetic guide plate 3022 and the outer magnetic guide plate 3013 are located on the same horizontal plane. The central magnet 3021 is a permanent magnet, and a first magnetic gap is formed between the central magnet 3021 and the side magnetic guide plate 3012. The magnetic field of the central magnet 3021 radiates outward from the center and establishes a magnetic field. The first magnetic guide plate 3022 guides and converges the magnetic field lines, making the magnetic field in the first magnetic gap more concentrated and stronger, which can significantly improve the magnetic induction intensity received by the vibration system 200, thereby improving the sensitivity and loudness of the sound-generating device.

[0056] In some embodiments of this disclosure, the side magnet assembly 303 includes a side magnet 3031 and a side magnetic plate 3032. The side magnet 3031 is disposed outside the side magnetic plate 3012 and is located between the outer magnetic plate 3013 and the side magnetic plate 3032. The magnetization direction of the side magnet 3031 is opposite to that of the central magnet 3021.

[0057] In some embodiments of this disclosure, such as Figure 3 As shown, the central magnetic assembly 302 also includes a second magnetic guide plate 3023, which is disposed between the central magnet 3021 and the inner magnetic guide plate 3011.

[0058] like Figure 2 and Figure 3 As shown, the side magnetic assembly 303 includes a side magnet 3031 and a side magnetic guide plate 3032. The side magnet 3031 is disposed outside the side magnetic guide plate 3012, and a second magnetic gap is formed between the side magnet 3031 and the side magnetic guide plate 3012. One end of the side magnet 3031 is connected to the outer magnetic guide plate 3013, and the other end of the side magnet 3031 is connected to the side magnetic guide plate 3032.

[0059] In this embodiment, the side magnet 3031 is a block-shaped permanent magnet. Two side magnets 3031 are symmetrically arranged on both sides of the side magnetic guide plate 3012, with each side magnet 3031 located between the outer magnetic guide plate 3013 and the side magnetic guide plate 3032. The side magnets 3031 and the central magnet 3021 together form a magnetic field. The magnetization direction of the side magnets 3031 is opposite to that of the central magnet 3021, forming a closed magnetic field loop. The side magnetic guide plate 3032 simultaneously converges and guides the magnetic flux generated by the side magnets 3031 from both axial sides into the first magnetic gap and the second magnetic gap, increasing the magnetic flux density in the first and second magnetic gaps, thereby enhancing the driving force of the first vibration component 201 and the second vibration component 203. Furthermore, the side magnetic plate 3032 and the outer magnetic plate 3013 clamp and fix the side magnet 3031, which can constrain the direction of the magnetic field lines and reduce their divergence. This allows the magnetic field lines to cross the air gap between the side magnets 3031, forming a continuous flow path in the circumferential direction. This ensures that the magnetic field lines pass through the first and second magnetic gaps in a continuous and uniform distribution, supplying power to the vibration system 200. This side magnetic assembly 303 can further enhance the magnetic intensity of the first and second magnetic gaps, thereby increasing the driving force of the first vibration assembly 201 and the second vibration assembly 203.

[0060] In other embodiments, the edge magnet 3031 may also be a ring-shaped permanent magnet.

[0061] In the embodiments disclosed herein, such as Figure 3 As shown, the central magnetic assembly 302 also includes a second magnetic guide plate 3023, which is disposed on the inner magnetic guide plate 3011. The central magnet 3021 is located between the first magnetic guide plate 3022 and the second magnetic guide plate 3023. The second magnetic guide plate 3023 and the first magnetic guide plate 3022 guide and converge magnetic field lines, making the magnetic field in the first magnetic gap more concentrated and stronger.

[0062] In the embodiments disclosed herein, such as Figure 3 As shown, the side magnetic guide plate 3032 and the second magnetic guide plate 3023 are located on the same horizontal plane and together form a magnetic guide yoke. The magnetic guide yoke provides a continuous magnetic flux loop for the magnetic circuit in the first magnetic gap and the magnetic circuit in the second magnetic gap, shortening and reducing the magnetic resistance of the magnetic field lines when transitioning between the inner and outer magnetic circuits, effectively improving the total magnetic flux utilization of the magnetic circuit system 300, thereby further improving the driving force of the first vibration component 201 and the second vibration component 203, and thus improving the sensitivity and loudness of the sound generating device.

[0063] In some embodiments of this disclosure, the central magnetic assembly 302 further includes a second magnetic guide plate 3023, which is disposed between the central magnet 3021 and the inner magnetic guide plate 3011, and the axial thickness of the first magnetic guide plate 3022 is greater than the axial thickness of the second magnetic guide plate 3023.

[0064] In this embodiment, the central magnetic assembly 302 further includes a second magnetic guide plate 3023, which is disposed on the inner magnetic guide plate 3011. The central magnet 3021 is located between the first magnetic guide plate 3022 and the second magnetic guide plate 3023. The second magnetic guide plate 3023 and the first magnetic guide plate 3022 guide and converge magnetic field lines, making the magnetic field in the first magnetic gap more concentrated and stronger.

[0065] In the embodiments disclosed herein, such as Figure 3 As shown, the axial thickness of the first magnetic plate 3022 is greater than the axial thickness of the second magnetic plate 3023. In this way, the asymmetry of driving force caused by the structure of the first vibration component 201 and the second vibration component 203 can be compensated, so that the magnitude of the Ampere force on the first vibration component 201 and the second vibration component 203 is the same when they move, thereby achieving vibration symmetry and improving the fidelity of the sound effect.

[0066] In some embodiments of this disclosure, the outer casing 100 includes a first casing 101 and a second casing 102, a first vibration component 201 is connected to the first casing 101, a second vibration component 203 is connected to the second casing 102, and a magnetic circuit system 300 is located between the first casing 101 and the second casing 102.

[0067] In the embodiments disclosed herein, such as Figure 1 and Figure 2 As shown, the outer casing 100 includes a first casing 101 and a second casing 102, which are disposed opposite to and connected to each other, forming an installation space between them for mounting the vibration system 200 and the magnetic circuit system 300. A first vibration component 201 is disposed within the first casing 101, and a second vibration component 203 is disposed within the second casing 102. The first casing 101 and the second casing 102 allow the first vibration component 201 and the second vibration component 203 to be suspended, thereby providing space for their vibration. The magnetic circuit system 300 is located between the first vibration component 201 and the second vibration component 203, and connects the first casing 101 and the second casing 102. For example, an outer magnetic plate 3013 is connected to the first casing 101, and a side magnetic component 303 is connected to the second casing 102.

[0068] By setting up the first housing 101 and the second housing 102, the installation of the first vibration component 201, the second vibration component 203, and the magnetic circuit system 300 becomes more convenient.

[0069] In some embodiments of this disclosure, the first vibration assembly 201 further includes a first centering support 2014, the inner side of the first spring wave 2013 and the first centering support 2014 is connected to the first frame 2015 of the first voice coil assembly 2012, and the outer side of the first spring wave 2013 and the first centering support 2014 is connected to the first housing 101.

[0070] In some embodiments of this disclosure, the second vibration assembly 203 further includes a second centering support 2034, the inner side of the second spring wave 2033 and the second centering support 2034 is connected to the second frame 2035 of the second voice coil assembly 2032, and the outer side of the second spring wave 2033 and the second centering support 2034 is connected to the second housing 102.

[0071] In the embodiments disclosed herein, such as Figure 2 and Figure 4 As shown, the first voice coil assembly 2012 includes a first frame 2015 and a first voice coil 2016. One end of the first frame 2015 is connected to the first diaphragm 2011, and the other end of the first frame 2015 is wound with the first voice coil 2016. The first voice coil 2016 is located within a first magnetic gap. After energization, the first voice coil 2016 vibrates under force in the first magnetic gap, and the first frame 2015 transmits the vibration to the first diaphragm 2011. The inner sides of the first spider 2013 and the first centering support 2014 are connected to the first frame 2015, and the outer sides of the first spider 2013 and the first centering support 2014 are connected to the first housing 101. The first inner connecting part 2018 is connected to the first frame 2015, and the first inner fixing part 2021 is connected to the first frame 2015.

[0072] In this embodiment, as Figure 5 As shown, the input and output lines of the first voice coil 2016 can be soldered at the first centering support 2014, which reduces the process difficulty compared to soldering the input and output lines of the first voice coil 2016 to the pads on the side wall of the first frame 2015.

[0073] like Figure 2 and Figure 4 As shown, the second voice coil assembly 2032 includes a second frame 2035 and a second voice coil 2036. One end of the second frame 2035 is connected to the second diaphragm 2031, and the other end of the second frame 2035 is wound with the second voice coil 2036, which is located within the second magnetic gap. When energized, the second voice coil 2036 vibrates under force within the second magnetic gap, and the second frame 2035 transmits the vibration to the second diaphragm 2031. The inner side of the second spider 2033 and the second centering support 2034 is connected to the second frame 2035, and the outer side of the second spider 2033 and the second centering support 2034 is connected to the second housing 102. The second inner connecting part 2038 is connected to the second frame 2035, and the second inner fixing part 2041 is connected to the second frame 2035.

[0074] In this embodiment, as Figure 5 As shown, the input and output lines of the second voice coil 2036 can be soldered at the second centering support 2034, which reduces the process difficulty compared to soldering the input and output lines of the second voice coil 2036 to the pads on the side wall of the second frame 2035.

[0075] In this embodiment, the inner diameter of the first voice coil 2016 is smaller than the inner diameter of the second voice coil 2036. The opening directions of the first magnetic gap and the second magnetic gap are opposite, and the first magnetic gap and the second magnetic gap are spaced apart in the horizontal direction. The axial thickness of the first magnetic plate 3022 is greater than the axial thickness of the second magnetic plate 3023, so that the magnitude of the Ampere force experienced by the first vibration component 201 and the second vibration component 203 is the same when they move. The first voice coil 2016 is located in the first magnetic gap, and the second voice coil 2036 is located in the second magnetic gap, which can effectively utilize the magnetic circuit system 300 and reduce the overall height. The first voice coil 2016 and the second voice coil 2036 are connected in series or in parallel. For example, the winding directions of the first voice coil 2016 and the second voice coil 2036 are the same, and the current directions of the two are opposite. This arrangement makes the Ampere force experienced by the first voice coil 2016 and the second voice coil 2036 opposite, that is, the first vibration component 201 and the second vibration component 203 simultaneously move away from and towards the magnetic circuit system 300.

[0076] In some embodiments of this disclosure, the housing 100 further includes connectors 103, and a plurality of connectors 103 connect the first housing 101 and the second housing 102.

[0077] In the embodiments disclosed herein, such as Figure 1 As shown, the outer casing 100 also includes connectors 103. One end of the connector 103 is connected to the first casing 101, and the other end is connected to the second casing 102. The first casing 101 and the second casing 102 are fixedly connected by multiple connectors 103. For example, the connector 103 can be block-shaped, sheet-shaped, etc. The material of the connector 103 can be metal, ceramic, polymer material, wood, etc. Using connectors 103 can ensure a stable connection between the first casing 101 and the second casing 102, improve the overall rigidity of the outer casing 100, and suppress resonance.

[0078] The first housing 101 and the second housing 102 can be connected by a connector 103 and bolts, with the bolts used to secure the connector 103. The end of the connector 103 can also be directly fixed to the side wall of the first housing 101 and / or the second housing 102. Each end of the connector 103 has a mounting hole, which is connected to the first housing 101 and the second housing 102 respectively by bolts. Bolt fixing provides better stability and allows for flexible disassembly, facilitating later maintenance.

[0079] The connector 103 can also be connected to the first housing 101 and the second housing 102 by means of snap-fit, adhesive or other methods.

[0080] In some embodiments of this disclosure, a first protrusion 104 is provided on the first housing 101, and a second protrusion 105 is provided on the second housing 102. The first protrusion 104 and the second protrusion 105 are arranged opposite to each other. One end of the connector 103 is connected to the first protrusion 104, and the other end of the connector 103 is connected to the second protrusion 105.

[0081] In this disclosed embodiment, please refer to Figure 1 and Figure 2 The first housing 101 has a plurality of first protrusions 104 near one end edge of the second housing 102, and the second housing 102 has a plurality of second protrusions 105 near one end edge of the first housing 101. The first protrusions 104 and second protrusions 105 are arranged opposite to each other. At least some of the first protrusions 104 and second protrusions 105 are connected to connectors 103, one end of which is connected to a first protrusion 104, and the other end of which is connected to a second protrusion 105. The first protrusions 104 and second protrusions 105 serve a limiting function, resulting in higher installation accuracy for the first housing 101 and the second housing 102, and providing installation space for assembly. Furthermore, the gaps between adjacent first protrusions 104 and adjacent second protrusions 105 provide a channel for airflow communication between the internal and external airflow of the sound-generating device, facilitating airflow exchange, reducing the vibration resistance of the first vibration assembly 201 and the second vibration assembly 203, and improving vibration performance.

[0082] In this embodiment, the end fixing position of the connector 103 can be a first protrusion 104 and / or a second protrusion 105. The first protrusion 104 and the second protrusion 105, together with the connector 103, improve the assembly accuracy of the housing 100 and enhance the compressive strength of the housing 100. The connection between the first protrusion 104 and the second protrusion 105 through the connector 103 can also transmit vibration energy, making the vibration of the first housing 101 and the second housing 102 tend to be synchronized and suppressing abnormal noise.

[0083] In some embodiments of this disclosure, the magnetic circuit system 300 further includes a first short-circuit ring 304 disposed outside the central magnetic assembly 302.

[0084] In some embodiments of this disclosure, the magnetic circuit system 300 further includes a second short-circuit ring 305, which is disposed on the outside of the side magnetic guide plate 3012 and / or the inner magnetic guide plate 3011.

[0085] In embodiments of this disclosure, such as Figure 2 and Figure 3As shown, the magnetic circuit system 300 also includes a first short-circuit ring 304. For example, the first short-circuit ring 304 is a ring-shaped Faraday short-circuit ring, and the first short-circuit ring 304 is disposed on the outside of the central magnet 3021.

[0086] The first short-circuit ring 304 is made of metal, such as stainless steel or low-carbon steel. The first short-circuit ring 304 generates a reverse magnetic flux through induced current, which effectively reduces the dynamic inductance of the first voice coil 2016, making the equivalent inductance of the first voice coil 2016 and the second voice coil 2036 more consistent and stable, thereby ensuring the consistency of the driving force of the first vibration component 201 and the second vibration component 203.

[0087] The magnetic circuit system 300 also includes a second short-circuit ring 305. For example, the second short-circuit ring 305 is a ring-shaped or bowl-shaped Faraday short-circuit ring, and the second short-circuit ring 305 is disposed on the outside of the side magnetic plate 3012 and / or the inner magnetic plate 3011.

[0088] The second short-circuit ring 305 is made of metal, such as stainless steel or low-carbon steel. The second short-circuit ring 305 generates a reverse magnetic flux through induced current, which effectively reduces the dynamic inductance of the second voice coil 2036, making the equivalent inductance of the first voice coil 2016 and the second voice coil 2036 more consistent and stable, thereby ensuring the consistency of the driving force of the first vibration component 201 and the second vibration component 203.

[0089] In some embodiments of this disclosure, an electronic device is provided that includes the sound-generating device described in any of the above embodiments.

[0090] The electronic device in the embodiments of this disclosure may be a sound system, a speaker, or other similar device.

[0091] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0092] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A sound-generating device, characterized in that, include: shell; A vibration system includes a first vibration component and a second vibration component. The first vibration component includes a first diaphragm connected to one end of the housing. The second vibration component includes a second diaphragm connected to the other end of the housing. A magnetic circuit system is connected to the outer shell and located between the first vibration component and the second vibration component. The magnetic circuit system includes a magnetic cup, a central magnetic component, and a side magnetic component. The magnetic cup includes an inner magnetic guide plate, a side magnetic guide plate, and an outer magnetic guide plate. The inner magnetic guide plate is connected to one end of the side magnetic guide plate, and the outer magnetic guide plate is connected to the other end of the side magnetic guide plate. The central magnetic component is disposed on the inner magnetic guide plate and is located inside the side magnetic guide plate, forming a first magnetic gap between the central magnetic component and the side magnetic guide plate. The side magnetic component is disposed on the outer magnetic guide plate and is located outside the side magnetic guide plate, forming a second magnetic gap between the side magnetic guide plate and the side magnetic guide plate. The first vibration assembly further includes a first voice coil assembly and a first spider. One end of the first voice coil assembly is connected to the first diaphragm, and the other end is located within the first magnetic gap. The inner side of the first spider is connected to the first voice coil assembly, and the outer side of the first spider is connected to the outer shell. The second vibration assembly further includes a second voice coil assembly and a second spider. One end of the second voice coil assembly is connected to the second diaphragm, and the other end is located within the second magnetic gap. The inner side of the second spider is connected to the second voice coil assembly, and the outer side of the second spider is connected to the outer shell. At least one of the first vibration assembly and the second vibration assembly further includes a centering support. The inner side of the centering support is connected to the corresponding voice coil assembly, and the outer side of the centering support is connected to the outer shell. The first vibration assembly further includes a first centering support; the first spring includes a first outer connecting part, a first inner connecting part, and a first deformation part; the first outer connecting part is connected to the outer shell; the first inner connecting part is connected to the first voice coil assembly; and the first deformation part connects the first outer connecting part and the first inner connecting part. The first centering support includes a first outer fixing part, a first inner fixing part, and a first elastic arm; the first outer fixing part is connected to the outer shell; the first inner fixing part is connected to the first voice coil assembly; and the first elastic arm connects the first outer fixing part and the first inner fixing part; the first deformation part and the first elastic arm are sequentially staggered. And / or... The second vibration assembly further includes a second centering support plate. The second spring includes a second outer connecting part, a second inner connecting part, and a second deformation part. The second outer connecting part is connected to the outer shell, the second inner connecting part is connected to the second voice coil assembly, and the second deformation part connects the second outer connecting part and the second inner connecting part. The second centering support plate includes a second outer fixing part, a second inner fixing part, and a second elastic arm. The second outer fixing part is connected to the outer shell, the second inner fixing part is connected to the second voice coil assembly, and the second elastic arm connects the second outer fixing part and the second inner fixing part. The second deformation part and the second elastic arm are arranged alternately in sequence.

2. The sound-generating device according to claim 1, characterized in that, The central magnetic assembly includes a central magnet and a first magnetic guide plate. One end of the central magnet is connected to the first magnetic guide plate, and the other end of the central magnet is connected to the inner magnetic guide plate.

3. The sound-generating device according to claim 2, characterized in that, The edge magnet assembly includes an edge magnet and an edge magnetic guide plate. The edge magnet is disposed outside the edge magnetic guide plate and located between the outer magnetic guide plate and the edge magnetic guide plate. The magnetization direction of the edge magnet is opposite to that of the central magnet; and / or, The central magnetic assembly further includes a second magnetic guide plate, which is disposed between the central magnet and the inner magnetic guide plate.

4. The sound-generating device according to claim 2, characterized in that, The central magnetic assembly further includes a second magnetic guide plate, which is disposed between the central magnet and the inner magnetic guide plate, and the axial thickness of the first magnetic guide plate is greater than the axial thickness of the second magnetic guide plate.

5. The sound-generating device according to claim 1, characterized in that, The outer casing includes a first housing and a second housing, the first vibration component is connected to the first housing, the second vibration component is connected to the second housing, and the magnetic circuit system is located between the first housing and the second housing.

6. The sound-generating device according to claim 5, characterized in that, The first vibration assembly further includes a first centering support, the inner side of the first spring and the first centering support is connected to the first frame of the first voice coil assembly, and the outer side of the first spring and the first centering support is connected to the first housing; and / or, The second vibration assembly further includes a second centering support plate, the inner side of the second spring and the second centering support plate is connected to the second frame of the second voice coil assembly, and the outer side of the second spring and the second centering support plate is connected to the second housing.

7. The sound-generating device according to claim 5, characterized in that, The housing also includes connectors, and a plurality of the connectors connect the first housing and the second housing.

8. The sound-generating device according to claim 7, characterized in that, The first housing is provided with a first protrusion, and the second housing is provided with a second protrusion. The first protrusion and the second protrusion are arranged opposite to each other. One end of the connector is connected to the first protrusion, and the other end of the connector is connected to the second protrusion.

9. The sound-generating device according to claim 1, characterized in that, The magnetic circuit system further includes a first short-circuit ring disposed outside the central magnetic assembly; and / or, The magnetic circuit system further includes a second short-circuit ring, which is disposed on the outside of the side magnetic plate and / or the inner magnetic plate.

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

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