Sound production device and electronic device

Abstract

The present application relates to a kind of sound production device and electronic equipment.The device includes: shell;Magnetic circuit system, magnetic circuit system is connected with shell, magnetic circuit system has magnetic gap;Vibration system, vibration system includes diaphragm assembly, voice coil assembly and centering bracket, diaphragm assembly is connected with shell, one end of voice coil assembly is connected with diaphragm assembly, the other end of voice coil assembly is located in magnetic gap;Centering bracket includes connecting end, fixed end and elastic arm, connecting end connects voice coil assembly, fixed end connects shell, elastic arm connects connecting end and fixed end;Shell is provided with first gap, elastic arm is stretched from first gap, the end of shell away from diaphragm assembly is provided with limiting slot, at least part of fixed end is arranged in limiting slot.The limiting slot of the disclosed embodiment ensures the accurate assembly of vibration system, simplifies the assembly process, improves production efficiency, and improves the yield of sound production device.

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] In existing large-speaker sound-generating devices, springs / spider coils and nylon wires are typically used for electrical connection and vibration support. However, the spider coil is prone to tearing when the vibration system amplitude is large, and the use of nylon wires also increases the manufacturing difficulty. Technicians have been working to apply centering supports to large-speaker sound-generating devices, but there are still shortcomings in the mechanical positioning and fixation of centering supports. The assembly of centering supports is usually done with glue, which is prone to misalignment during the bonding and curing process. This can cause the voice coil and magnetic circuit to be misaligned, affecting the assembly accuracy and consistency of the sound-generating device, leading to issues such as friction between the voice coil and the magnetic circuit system, and sound distortion. Summary of the Invention

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

[0005] According to one aspect of the present invention, a sound-generating device is provided. The device includes: shell; A magnetic circuit system, the magnetic circuit system being connected to the housing, the magnetic circuit system having a magnetic gap; A vibration system comprising a diaphragm assembly, a voice coil assembly, and a centering support, wherein the diaphragm assembly is connected to the housing, one end of the voice coil assembly is connected to the diaphragm assembly, and the other end of the voice coil assembly is located within a magnetic gap; The centering support includes a connecting end, a fixed end, and a spring arm. The connecting end is connected to the voice coil assembly, the fixed end is connected to the housing, and the spring arm connects the connecting end and the fixed end. The housing has a first notch, the spring arm extends from the first notch, and a limiting groove is provided at the end of the housing away from the diaphragm assembly. At least a portion of the fixed end is disposed within the limiting groove.

[0006] Optionally, a limiting post is provided at the end of the housing opposite to the diaphragm assembly, and the limiting post is configured to limit the elastic arm.

[0007] Optionally, the limiting post includes a first limiting post and a second limiting post, the first limiting post and the second limiting post being disposed opposite to each other, and the elastic arm being disposed between the first limiting post and the second limiting post; and / or, The limiting post is provided at the end of the spring arm near the fixed end.

[0008] Optionally, the fixed end has at least one protrusion on the side edge away from the voice coil assembly, and the protrusion is fixed in the limiting groove.

[0009] Optionally, the magnetic circuit system includes a magnetic cup and a magnetic assembly. The magnetic cup includes an inner magnetic guide plate and a side magnetic guide plate. The side magnetic guide plate is arranged around the inner magnetic guide plate and is connected to the outer shell. The magnetic assembly is connected to the inner magnetic guide plate, and a magnetic gap is formed between the magnetic assembly and the side magnetic guide plate.

[0010] Optionally, a second notch is provided on the side magnetic guide plate, the position of the second notch corresponding to the position of the first notch, and the spring arm extends from the second notch and the first notch.

[0011] Optionally, the magnetic assembly includes a first magnet, a central magnetic guide plate, and a second magnet. The first magnet is connected to the inner magnetic guide plate, one end of the central magnetic guide plate is connected to the first magnet, and the other end of the central magnetic guide plate is connected to the second magnet.

[0012] Optionally, the end of the housing facing away from the diaphragm assembly is further provided with a support platform, and the limiting groove is provided on the support platform.

[0013] Optionally, the inner circumferential side of the housing is provided with a mounting portion, the magnetic circuit system is disposed on the mounting portion, and the first notch is formed in the side wall of the mounting portion.

[0014] According to a second aspect of the present invention, an electronic device is provided. This device includes the sound-generating device described in any one of the preceding claims.

[0015] In this embodiment, a limiting groove is provided on the outer casing, and the fixed end of the centering support is at least partially fixed in the limiting groove. The limiting groove centers the centering support on the central axis of the sound-generating device, ensuring the coaxiality of the voice coil and the magnetic circuit system and reducing the risk of the voice coil rubbing against the magnetic circuit system. The limiting groove ensures the precise assembly of the vibration system, simplifies the assembly process, improves production efficiency, and increases the yield rate of the sound-generating device.

[0016] 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

[0017] 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.

[0018] Figure 1This is a schematic diagram of the overall structure of the sound-generating device according to an embodiment of the present disclosure.

[0019] Figure 2 These are exploded views of the various structures of the sound-generating device according to an embodiment of this disclosure.

[0020] Figure 3 This is a schematic diagram of the sound-generating device according to an embodiment of the present disclosure from another perspective.

[0021] Figure 4 This is a schematic diagram of the structure of the housing of the sound-generating device according to an embodiment of the present disclosure.

[0022] Figure 5 This is a cross-sectional view of a sound-generating device according to an embodiment of the present disclosure.

[0023] Explanation of reference numerals in the attached figures: 100. Outer shell; 101. First notch; 102. Limiting groove; 103. Limiting post; 104. Support platform; 105. Through hole; 106. Mounting part; 107. Bottom wall; 108. Side wall; 200. Vibration system; 201. Diaphragm assembly; 2011. Edge part; 2012. Surround part; 2013. Vibrating plate; 202. Voice coil assembly; 2021. Frame; 20 22. Voice coil; 203. Centering support; 2031. Connecting end; 2032. Fixed end; 2033. Spring arm; 2034. Protrusion; 300. Magnetic circuit system; 301. Magnetic cup; 3011. Inner magnetic guide plate; 3012. Side magnetic guide plate; 3013. Second notch; 302. Magnetic assembly; 3021. First magnet; 3022. Central magnetic guide plate; 3023. Second magnet. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] The technical solutions provided by the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0030] In related technologies, a sound-generating device is a device that converts electrical energy into sound energy. Based on Lorentz's law, it drives the voice coil to vibrate through a magnetic circuit system to produce sound. The centering support in the sound-generating device is usually assembled using adhesive. During the bonding and curing process, the centering support is prone to misalignment, causing the voice coil to be out of sync with the magnetic circuit. This affects the assembly accuracy and consistency of the sound-generating device, leading to issues such as the voice coil rubbing against the magnetic circuit system and sound distortion.

[0031] The sound-generating device provided in this embodiment includes a housing, a vibration system, and a magnetic circuit system. The vibration system and the magnetic circuit system are installed inside the housing, and the magnetic circuit system drives the vibration system to vibrate and generate sound. The vibration system includes a voice coil assembly and a centering support. The connecting end of the centering support is connected to the voice coil, and the fixed end of the centering support is fixed to the housing. The housing includes a limiting groove, and the fixed end of the centering support is at least partially fixed in the limiting groove. The limiting groove centers the centering support on the central axis of the sound-generating device, ensuring the coaxiality of the voice coil and the magnetic circuit system and reducing the risk of the voice coil rubbing against the magnetic circuit system. The limiting groove achieves the centering of the centering support, ensuring precise assembly of the vibration system, simplifying the assembly process, improving production efficiency, and increasing the yield rate of the sound-generating device.

[0032] This disclosure provides a sound-generating device. The sound-generating device includes: Casing 100; A magnetic circuit system 300 is connected to the housing 100 and has a magnetic gap. Vibration system 200 includes diaphragm assembly 201, voice coil assembly 202 and centering support 203. Diaphragm assembly 201 is connected to housing 100. One end of voice coil assembly 202 is connected to diaphragm assembly 201 and the other end of voice coil assembly 202 is located in magnetic gap. The centering support 203 includes a connecting end 2031, a fixed end 2032, and a spring arm 2033. The connecting end 2031 is connected to the voice coil assembly 202, the fixed end 2032 is connected to the housing 100, and the spring arm 2033 connects the connecting end 2031 and the fixed end 2032. The housing 100 is provided with a first notch 101, and the spring arm 2033 extends out from the first notch 101. A limiting groove 102 is provided at the end of the housing 100 away from the diaphragm assembly 201, and at least a portion of the fixed end 2032 is disposed in the limiting groove 102.

[0033] Specifically, a sound-generating device is used to convert electrical energy into sound energy. This device can be a miniature loudspeaker, speaker enclosure, horn, etc. Figure 1 As shown, the sound-generating device includes a housing 100, a vibration system 200, and a magnetic circuit system 300. The vibration system 200 and the magnetic circuit system 300 are installed within the housing 100, and the magnetic circuit system 300 has a magnetic gap. One end of the vibration system 200 is located within the magnetic gap. The magnetic circuit system 300 provides a magnetic field for the vibration system 200. When energized, the vibration system 200 experiences mechanical vibration at the magnetic gap due to electromagnetic force, thereby propelling air to produce sound. The magnetic housing 100 provides support and mounting space for the vibration system 200 and the magnetic circuit system 300, and protects both.

[0034] like Figure 2 As shown, the vibration system 200 includes a diaphragm assembly 201 and a voice coil assembly 202. The diaphragm assembly 201 is connected to the housing 100. One end of the voice coil assembly 202 is connected to the diaphragm assembly 201, and the other end of the voice coil assembly 202 is located in a magnetic gap. The voice coil assembly 202 is vibrated by electromagnetic force in the magnetic gap and transmits the vibration to the diaphragm assembly 201. The diaphragm assembly 201 then reciprocates, pushing the air to generate sound waves.

[0035] like Figure 2 and Figure 3 As shown, the vibration system 200 also includes a centering support 203. One end of the centering support 203 is connected to the voice coil assembly 202, and the other end of the centering support 203 is connected to the housing 100. The centering support 203 constrains the axial movement of the voice coil assembly 202, prevents the voice coil assembly 202 from rubbing against the magnetic circuit system 300, and improves the stability of the voice coil assembly 202.

[0036] like Figure 2 and Figure 3 As shown, the centering support 203 includes a connecting end 2031, a fixed end 2032, and a spring arm 2033. The connecting end 2031 is connected to the voice coil assembly 202 and moves axially with the voice coil assembly 202. The fixed end 2032 is fixedly connected to the housing 100 and provides a fixed support point. The spring arm 2033 connects the connecting end 2031 and the fixed end 2032. The spring arm 2033 provides the necessary compliance so that the connecting end 2031 can move axially. At the same time, the spring arm 2033 can provide elastic deformation to suppress the radial displacement of the voice coil assembly 202 and prevent the voice coil assembly 202 from rubbing against the magnetic circuit system 300.

[0037] Optionally, the centering support 203 can be made of metal, polymer materials, etc. The centering support 203 can also be made of a flexible circuit board. The flexible circuit board not only suppresses the radial displacement of the voice coil assembly 202, but also facilitates the connection between the voice coil assembly 202 and external circuitry. The spring arm 2033 can be arc-shaped, zigzag-shaped, wavy, etc. The centering support 203 can be manufactured using processes such as stamping, injection molding, and lamination. Of course, the material, shape, and molding method of the centering support 203 are not limited to the above embodiments; those skilled in the art can select according to actual needs.

[0038] like Figure 3 and Figure 4 As shown, a first notch 101 is provided on the inner side of the outer casing 100, and the spring arm 2033 extends from the first notch 101 and connects to the fixed end 2032. The first notch 101 is used to avoid the spring arm 2033, leaving deformation space for the spring arm 2033 and preventing the spring arm 2033 from colliding with the outer casing 100 during deformation, causing the voice coil assembly 202 to shift. At the same time, the first notch 101 can also serve as an airflow channel, balancing the air pressure inside and outside the diaphragm assembly 201, making the vibration of the vibration system 200 smoother, with less resistance and a larger amplitude.

[0039] like Figure 3 and Figure 4 As shown, the housing 100 is provided with a limiting groove 102, which is located at the end of the housing 100 away from the diaphragm assembly 201. The contour of the limiting groove 102 matches at least a portion of the contour of the fixed end 2032. At least a portion of the fixed end 2032 is embedded and fixed in the limiting groove 102. The limiting groove 102 can position the centering support 203, preventing the fixed end 2032 from becoming misaligned during assembly, which would cause the voice coil assembly 202 to be misaligned due to the constraint force of the centering support 203 during vibration. This improves the installation accuracy of the centering support 203 and the yield rate of the sound-generating device, and ensures high coaxiality between the voice coil assembly 202 and the magnetic circuit assembly. The limiting groove 102 is located at the end of the housing 100 away from the diaphragm assembly 201, that is, the limiting groove 102 is located on the outer surface of the housing 100. The fixed end 2032 is installed on the outside of the housing 100, which facilitates replacement in case of failure of the centering support 203.

[0040] like Figure 2 and Figure 5 As shown, the voice coil assembly 202 includes a frame 2021 and a voice coil 2022. One end of the frame 2021 is connected to the diaphragm assembly 201, and the other end of the frame 2021 is wound with the voice coil 2022. The voice coil 2022 is located in the magnetic gap and is connected to the connecting end 2031. The voice coil 2022 and the frame 2021 are concentrically arranged with the central axis of the sound-generating device through the centering support 203.

[0041] When the voice coil assembly 202 is stationary, the fixed end 2032, the spring arm 2033, and the connecting end 2031 work together to make the voice coil assembly 202 concentric with the central axis of the sound-generating device. When the connecting end 2031 moves axially with the voice coil assembly 202, the spring arm 2033 deforms and provides elastic restoring force to suppress the radial sway of the voice coil assembly 202 and prevent the voice coil 2022 from rubbing against the magnetic circuit system 300, which would cause sound distortion.

[0042] like Figure 2 and Figure 5 As shown, the diaphragm assembly 201 includes an edge portion 2011, a folded ring portion 2012, and a vibrating plate 2013. The edge portion 2011 is fixedly connected to the outer shell 100. The outer side of the folded ring portion 2012 is connected to the edge portion 2011, and the inner side of the folded ring portion 2012 is connected to the vibrating plate 2013. The vibrating plate 2013 is located in the central region of the folded ring portion 2012, and the frame 2021 is connected to the vibrating plate 2013. The edge portion 2011 is used to fix the diaphragm assembly 201 to the outer shell 100, and the folded ring portion 2012 is used to provide elastic restoring force for the vibration of the vibrating plate 2013. The vibrating plate 2013 pushes air to generate sound waves.

[0043] When powered on, the voice coil 2022 vibrates under the action of electromagnetic force in the magnetic gap, and transmits the vibration to the diaphragm 2013 through the frame 2021. The diaphragm 2013 then reciprocates. The folded ring 2012 provides suspension support for the diaphragm 2013 and provides elastic restoring force.

[0044] In this embodiment, the vibration system 200 of the sound-generating device includes a centering support 203. The centering support 203 includes a connecting end 2031, a fixed end 2032, and a spring arm 2033. The connecting end 2031 is connected to the voice coil assembly 202 and moves axially with the voice coil assembly 202. The fixed end 2032 is fixedly connected to the housing 100 and provides a fixed support point. The spring arm 2033 connects the connecting end 2031 and the fixed end 2032. The spring arm 2033 provides the necessary compliance so that the connecting end 2031 can move along the axis. At the same time, the spring arm 2033 can provide elastic deformation to suppress the radial displacement of the voice coil assembly 202 and prevent the voice coil assembly 202 from rubbing against the magnetic circuit system 300. The housing 100 is provided with a limiting groove 102, which is opened at one end of the housing 100 away from the diaphragm assembly 201. The contour of the limiting groove 102 matches the contour of at least part of the fixed end 2032. At least part of the fixed end 2032 is embedded and fixed in the limiting groove 102. The limiting groove 102 can play the role of positioning the centering support 203, preventing the fixed end 2032 from being tilted during the assembly of the sound generating device, which would cause the voice coil assembly 202 to be tilted by the constraint force of the centering support 203 when vibrating. This improves the installation accuracy of the centering support 203 and the yield of the sound generating device, and ensures high coaxiality between the voice coil assembly 202 and the magnetic circuit system 300.

[0045] In some embodiments of this disclosure, a limiting post 103 is also provided at one end of the housing 100 away from the diaphragm assembly 201, and the limiting post 103 is configured to limit the elastic arm 2033.

[0046] In the embodiments disclosed herein, such as Figure 3 and Figure 4 As shown, the housing 100 is also provided with a limiting post 103, which is located at the end of the housing 100 away from the diaphragm assembly 201. The limiting post 103 and the limiting groove 102 are located on the same end face. The limiting post 103 is provided along the extension direction of the spring arm 2033. The limiting post 103 protrudes from the housing 100 along the vibration direction of the spring arm 2033 and is located on the side of the spring arm 2033. The limiting post 103 is used to limit the spring arm 2033, restricting the positional deviation of the spring arm 2033, so that the installation of the centering support 203 is more accurate. In this embodiment, the limiting post 103 positions the spring arm 2033, and the limiting groove 102 positions the fixed end 2032. The limiting post 103 and the limiting groove 102 together ensure the accurate fitting of the centering support 203, thereby ensuring the axial positioning of the voice coil assembly 202 and further improving the yield rate of the sound-generating device.

[0047] Optionally, the limiting post 103 can be integrally formed with the outer shell 100, for example, by injection molding to integrally form the outer shell 100 and the limiting post 103. This makes the connection between the outer shell 100 and the limiting post 103 easier and simplifies the processing steps. Of course, the limiting post 103 and the outer shell 100 can also be formed independently and then assembled together. The limiting post 103 can be a cylinder, rectangular post, triangular post, semi-circular post, elliptical post, or an irregularly shaped post. The number of limiting posts 103 can be one or more.

[0048] Of course, the forming method, shape, and quantity of the limiting post 103 are not limited here, and those skilled in the art can set them according to actual needs.

[0049] In some embodiments of this disclosure, the limiting post 103 is provided at the end of the elastic arm 2033 near the fixed end 2032. This further assists in the positioning of the fixed end 2032 and makes it less likely to interfere with the elastic arm 2033 during deformation.

[0050] In some embodiments of this disclosure, the limiting post 103 includes a first limiting post and a second limiting post, which are disposed opposite to each other, and the elastic arm 2033 is disposed between the first limiting post and the second limiting post.

[0051] In the embodiments disclosed herein, such as Figure 3 and Figure 4 As shown, the limiting post 103 includes a first limiting post and a second limiting post, which are arranged opposite to each other along the extension direction of the spring arm 2033. The spring arm 2033 is embedded between the first limiting post and the second limiting post. The first limiting post and the second limiting post are located on opposite sides of the spring arm 2033. The first limiting post and the second limiting post cooperate with each other to limit the rotation and displacement of the spring arm 2033 in the plane, preventing the spring arm 2033 from shifting position during assembly to the housing 100 or during use. The first limiting post and the second limiting post can further improve the installation accuracy of the centering support 203 on the housing 100.

[0052] Optionally, there may be one or more first limiting posts on one side of the extension direction of the spring arm 2033. There may also be one or more second limiting posts on the other side of the extension direction of the spring arm 2033. The first and second limiting posts may be contoured structures that match the components directly opposite the spring arm 2033. This arrangement can further improve the installation accuracy of the centering support 203 on the housing 100.

[0053] Of course, the installation positions of the first and second limiting posts are not limited to the above embodiments, and those skilled in the art can set them according to actual needs.

[0054] In some embodiments of this disclosure, at least one protrusion 2034 is provided on the side edge of the fixed end 2032 away from the voice coil assembly 202, and the protrusion 2034 is fixed in the limiting groove 102.

[0055] In the embodiments disclosed herein, such as Figure 3 As shown, the edge of the fixed end 2032 is provided with at least one protrusion 2034, which is located on the side of the fixed end 2032 away from the voice coil assembly 202. For example, the shape of the protrusion 2034 can be rectangular. The protrusion 2034 is fixedly disposed in the limiting groove 102, and the edge shape of the limiting groove 102 matches the edge shape of the protrusion 2034. The protrusion 2034 increases the contact area between the fixed end 2032 and the limiting groove 102, increases the adhesive application area, and enables the protrusion 2034 to form stronger anti-peeling and anti-shear capabilities. At the same time, the cooperation between the protrusion 2034 and the limiting groove 102 can constrain the fixed end 2032 and prevent the fixed end 2032 from twisting. The cooperation between the protrusion 2034 and the limiting groove 102 can also ensure the accurate installation position of the centering support 203, effectively preventing assembly errors and simplifying the assembly steps.

[0056] Optionally, the protrusion 2034 can be integrally formed with the fixed end 2032, for example, by stamping, injection molding, lamination, or other methods to integrally form the connecting end 2031, fixed end 2032, elastic arm 2033, and protrusion 2034. This simplifies the processing of the centering support 203 and increases its structural strength. The shape of the protrusion 2034 can also be triangular, semi-circular, trapezoidal, or other shapes.

[0057] Of course, the forming method and shape of the protrusion 2034 are not limited to the above embodiments, and those skilled in the art can set them according to actual needs.

[0058] In some embodiments of this disclosure, the magnetic circuit system 300 includes a magnetic bowl 301 and a magnetic assembly 302. The magnetic bowl 301 includes an inner magnetic guide plate 3011 and a side magnetic guide plate 3012. The side magnetic guide plate 3012 is arranged around the inner magnetic guide plate 3011 and is connected to the housing 100. The magnetic assembly 302 is connected to the inner magnetic guide plate 3011, and a magnetic gap is formed between the magnetic assembly 302 and the side magnetic guide plate 3012.

[0059] In the embodiments disclosed herein, such as Figure 2 and Figure 5 As shown, the magnetic circuit assembly includes a magnetic bowl 301 and a magnetic component 302. The magnetic component 302 is installed inside the magnetic bowl 301, forming a magnetic gap between the magnetic component 302 and the magnetic bowl 301. The magnetic component 302 includes a permanent magnet and generates a magnetic field. The magnetic bowl 301 has a bowl-shaped structure. The magnetic bowl 301 is used to guide and concentrate the magnetic field to increase the magnetic flux density in the magnetic gap. The magnetic bowl 301 is made of a magnetically conductive material, such as low-carbon steel.

[0060] like Figure 2 and Figure 5 As shown, the magnetic bowl 301 includes an inner magnetic guide plate 3011 and a side magnetic guide plate 3012. The side magnetic guide plate 3012 is annular and surrounds the inner magnetic guide plate 3011. The side magnetic guide plate 3012 is connected to the inner side of the outer shell 100. A magnetic assembly 302 is disposed on the inner magnetic guide plate 3011, and a magnetic gap is formed between the magnetic assembly 302 and the side magnetic guide plate 3012. The inner magnetic guide plate 3011 gathers the magnetic field lines emitted from one end of the magnetic assembly 302 and conducts them to the side magnetic guide plate 3012. The side magnetic guide plate 3012 constrains and guides the magnetic field lines into the magnetic gap. The magnetic field lines pass through the magnetic gap and return to the other end of the magnetic assembly 302 to form a closed loop.

[0061] In other embodiments, the magnetic circuit system 300 includes a central magnet, side magnets, and a base plate. The central magnet and side magnets are disposed on the base plate. The side magnets are arranged around the central magnet. A magnetic gap is formed between the central magnet and the side magnets. The base plate is made of low-carbon steel and not only serves to mount the central magnet and side magnets but also to conduct magnetism, increasing the magnetic flux density within the magnetic gap.

[0062] Of course, the structure of the magnetic circuit system 300 is not limited to the above embodiments, and those skilled in the art can make settings according to actual needs.

[0063] In some embodiments of this disclosure, a second notch 3013 is provided on the side magnetic plate 3012, the position of the second notch 3013 corresponds to the position of the first notch 101, and the spring arm 2033 extends from the second notch 3013 and the first notch 101.

[0064] In the embodiments disclosed herein, such as Figure 2 and Figure 3 As shown, a second notch 3013 is provided on the side magnetic guide plate 3012. The opening position of the second notch 3013 corresponds to the opening position of the first notch 101. The spring arm 2033 extends from the second notch 3013 and the first notch 101. The second notch 3013 and the first notch 101 are used to avoid the spring arm 2033, leaving deformation space for the spring arm 2033, and preventing the spring arm 2033 from colliding with the outer shell 100 during deformation, causing the voice coil assembly 202 to shift. In addition, the first notch 101 and the second notch 3013 can also serve as a channel for the internal airflow and external airflow of the sound-generating device, facilitating airflow exchange, balancing the air pressure inside and outside the diaphragm assembly 201, reducing the vibration resistance of the vibration system 200, and improving vibration performance.

[0065] Of course, the shape and size of the first notch 101 and the second notch 3013 are not limited here, and those skilled in the art can set them according to actual needs.

[0066] In some embodiments of this disclosure, the magnetic assembly 302 includes a first magnet 3021, a central magnetic guide plate 3022, and a second magnet 3023. The first magnet 3021 is connected to the inner magnetic guide plate 3011, one end of the central magnetic guide plate 3022 is connected to the first magnet 3021, and the other end of the central magnetic guide plate 3022 is connected to the second magnet 3023.

[0067] In the embodiments disclosed herein, such as Figure 2 and Figure 5 As shown, the magnetic assembly 302 includes a first magnet 3021, a central magnetic guide plate 3022, and a second magnet 3023. The first magnet 3021 is connected to the inner magnetic guide plate 3011. One end of the central magnetic guide plate 3022 is connected to the first magnet 3021, and the other end of the central magnetic guide plate 3022 is connected to the second magnet 3023. A magnetic gap is formed between the first magnet 3021, the central magnetic guide plate 3022, the second magnet 3023, and the side magnetic guide plate 3012.

[0068] The first magnet 3021 and the second magnet 3023 are permanent magnets. Optionally, the permanent magnets are ferrite permanent magnets, neodymium iron boron permanent magnets, etc. The magnetization direction of the first magnet 3021 is opposite to that of the second magnet 3023, and the magnetic field lines of the first magnet 3021 and the second magnet 3023 converge towards each other. The central magnetic guide plate 3022 constrains and converges the magnetic field lines generated by the first magnet 3021 and the second magnet 3023, and guides them in conjunction with the magnetic cup 301, concentrating and releasing the magnetic field lines into the magnetic gap, so that a magnetic field region with high magnetic flux density is formed in the magnetic gap. This can significantly increase the magnetic field strength experienced by the vibration system 200, increase the driving force of the vibration system 200, and thus improve the sensitivity and loudness of the generating device.

[0069] Of course, the structure of the magnetic component 302 is not limited to the above embodiments, and those skilled in the art can make settings according to actual needs.

[0070] In some embodiments of this disclosure, a support platform 104 is provided at one end of the housing 100 away from the diaphragm assembly 201, and a limiting groove 102 is provided on the support platform 104.

[0071] In the embodiments disclosed herein, such as Figure 3 and Figure 4 As shown, the housing 100 is also provided with a support platform 104. The end of the housing 100 facing away from the diaphragm assembly 201 protrudes in a direction away from the diaphragm assembly 201 to form the support platform 104. The support platform 104 is used to install the centering support 203 and the magnetic circuit system 300. A limiting groove 102 is provided on the support platform 104, and the fixed end 2032 is installed in the limiting groove 102.

[0072] like Figure 3 and Figure 4As shown, a cavity is formed between the support platform 104 and the diaphragm assembly 201. The cavity is connected to the magnetic gap through the first notch 101 and the second notch 3013. The side wall 108 of the support platform 104 is provided with a through hole 105. The through hole 105 and the first notch 101 and the second notch 3013 overlap at least partially in the radial projection. The through hole 105 allows the internal airflow of the sound-generating device to flow with the external airflow, which facilitates airflow exchange, reduces the vibration resistance of the vibration system 200, and improves the vibration performance.

[0073] In some embodiments, a limiting post 103 is also provided on the housing 100. The limiting post 103 is provided on the support platform 104 and is used to limit the spring arm 2033.

[0074] In some embodiments of this disclosure, a mounting portion 106 is provided circumferentially on the inner side of the housing 100, a magnetic circuit system 300 is disposed on the mounting portion 106, and a first notch 101 is formed in the side wall 108 of the mounting portion 106.

[0075] In the embodiments disclosed herein, such as Figure 4 and Figure 5 As shown, the housing 100 also includes a mounting portion 106, which is circumferentially disposed on the inner side of the housing 100. The magnetic circuit system 300 is mounted on the mounting portion 106. One end of the mounting portion 106 extends axially to form an annular bottom wall 107, and the magnetic cup 301 is connected to the bottom wall 107. The side wall 108 of the mounting portion 106 extends away from the diaphragm assembly 201, and a first notch 101 is formed on the side wall 108 of the mounting portion 106. The end of the side wall 108 of the mounting portion 106 is chamfered, and the chamfer is an angled chamfer. The chamfer makes the opening size of the housing 100 larger, so as to facilitate the mounting of the magnetic cup 301.

[0076] In some embodiments of this disclosure, an electronic device is provided that includes the sound-generating device of any of the above embodiments.

[0077] The electronic device in the embodiments of this disclosure may be a sound system, a speaker, or other similar device.

[0078] 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.

[0079] 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 magnetic circuit system, the magnetic circuit system being connected to the housing, the magnetic circuit system having a magnetic gap; A vibration system comprising a diaphragm assembly, a voice coil assembly, and a centering support, wherein the diaphragm assembly is connected to the housing, one end of the voice coil assembly is connected to the diaphragm assembly, and the other end of the voice coil assembly is located within a magnetic gap; The centering support includes a connecting end, a fixed end, and a spring arm. The connecting end is connected to the voice coil assembly, the fixed end is connected to the housing, and the spring arm connects the connecting end and the fixed end. The housing has a first notch, and the spring arm extends from the first notch. A limiting groove is provided at the end of the housing opposite to the diaphragm assembly. The limiting groove is formed on the outer surface of the housing. The fixed end is installed on the outside of the housing, and at least a portion of the fixed end is disposed within the limiting groove. A limiting post is also provided at the end of the housing opposite to the diaphragm assembly. The limiting post is configured to limit the movement of the spring arm.

2. The sound-generating device according to claim 1, characterized in that, The limiting post includes a first limiting post and a second limiting post, which are disposed opposite to each other, and the elastic arm is disposed between the first limiting post and the second limiting post; and / or, The limiting post is provided at the end of the spring arm near the fixed end.

3. The sound-generating device according to claim 1, characterized in that, The fixed end has at least one protrusion on the side edge away from the voice coil assembly, and the protrusion is fixed in the limiting groove.

4. The sound-generating device according to claim 1, characterized in that, The magnetic circuit system includes a magnetic cup and a magnetic assembly. The magnetic cup includes an inner magnetic guide plate and a side magnetic guide plate. The side magnetic guide plate is arranged around the inner magnetic guide plate and is connected to the outer shell. The magnetic assembly is connected to the inner magnetic guide plate, and a magnetic gap is formed between the magnetic assembly and the side magnetic guide plate.

5. A sound-generating device according to claim 4, characterized in that, The side magnetic plate is provided with a second notch, the position of which corresponds to the position of the first notch, and the spring arm extends from the second notch and the first notch.

6. A sound-generating device according to claim 4, characterized in that, The magnetic assembly includes a first magnet, a central magnetic guide plate, and a second magnet. The first magnet is connected to the inner magnetic guide plate, one end of the central magnetic guide plate is connected to the first magnet, and the other end of the central magnetic guide plate is connected to the second magnet.

7. A sound-generating device according to claim 1, characterized in that, The outer shell is also provided with a support platform at the end opposite to the diaphragm assembly, and the limiting groove is provided on the support platform.

8. A sound-generating device according to claim 1, characterized in that, The inner circumferential side of the outer casing is provided with a mounting part, the magnetic circuit system is disposed on the mounting part, and the first notch is formed in the side wall of the mounting part.

9. An electronic device, characterized in that, The sound-generating device includes any one of claims 1 to 8.

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