Sound production device and electronic device

Abstract

The application belongs to the technical field of electro-acoustic conversion and particularly relates to a sound production device and electronic equipment. The sound production device comprises a shell and a vibration system, the vibration system comprising a diaphragm assembly, a voice coil, a first centering web and a second centering web with an internal electric connection part; the first centering web comprises a first internal fixing part, a first connecting arm and a first external fixing part connected in sequence, and the second centering web comprises a second internal fixing part, a second connecting arm and a second external fixing part connected in sequence; wherein the length of the first connecting arm is less than the length of the second connecting arm so that the structural stiffness of the first connecting arm and the second connecting arm is the same, and along the vibration direction of the vibration system, the shell is provided with a first avoiding gap for avoiding the first connecting arm and a second avoiding gap for avoiding the second connecting arm. The above structure of the application can reduce the polarization of the vibration system, thereby improving the running stability of the sound production device and improving the sound production effect of the sound production device.

Description

Technical Field

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

[0002] In recent years, with the development of electronic devices, the requirements for thinner and lighter electronic products have become increasingly stringent, correspondingly leading to larger size requirements for sound-generating devices. Given the structural and dimensional limitations of sound-generating devices, improving their yield rate has become crucial. Among these factors, the polarization phenomenon of the voice coil is a significant influence on yield. Related technologies typically use centering supports to mitigate voice coil polarization. Conventional sound-generating devices mostly employ symmetrical centering support layouts. However, in recent years, driven by the trend of cost reduction, centering supports are often designed with both pad-equipped and pad-less versions, and these are often combined. This results in inconsistent amplitudes on both sides during product vibration, leading to the polarization phenomenon.

[0003] Therefore, in view of the above shortcomings, this invention is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a sound-generating device and an electronic device to at least partially solve the aforementioned technical problems in the prior art.

[0005] The first aspect of the present invention provides a sound-generating device, including a housing and a vibration system. The vibration system includes a diaphragm assembly, a voice coil, a first centering support, and a second centering support with an internal electrical connection. The outer periphery of the diaphragm assembly is fixed to the housing. One end of the voice coil is connected to the diaphragm assembly. The first centering support and the second centering support are respectively disposed at both ends of the housing. The first centering support includes a first inner fixing part, a first connecting arm, and a first outer fixing part connected in sequence. The second centering support includes a second inner fixing part, a second connecting arm, and a second outer fixing part connected in sequence. The first outer fixing part and the second outer fixing part are respectively connected to the housing. The lead portion of the voice coil is electrically connected to the second centering support.

[0006] The length of the first connecting arm is less than the length of the second connecting arm so that the structural stiffness of the first connecting arm and the second connecting arm is the same. Along the vibration direction of the vibration system, the housing is provided with a first clearance notch for the first connecting arm and a second clearance notch for the second connecting arm.

[0007] The sound-generating device provided by this invention may also have the following additional technical solutions:

[0008] In one specific embodiment of the present invention, the first connecting arm includes a first arm, a second arm, and a third arm connected in sequence, the first arm being connected to the first internal fixing part, and the third arm being connected to the first external fixing part; the second connecting arm includes a fourth arm, a fifth arm, and a sixth arm connected in sequence, the fourth arm being connected to the second internal fixing part, and the sixth arm being connected to the second external fixing part.

[0009] The housing has a first direction and a second direction that are perpendicular to each other. The first arm and the fourth arm are arranged along the first direction, and the second arm, the third arm, the fifth arm and the sixth arm are arranged along the second direction. The first clearance notch avoids the third arm, and the second clearance notch avoids the sixth arm.

[0010] In one specific embodiment of the present invention, along the second direction, the length of the first centering support is the same as the length of the second centering support, the length of the first external fixing part is greater than the length of the second external fixing part, and the length of the third arm is less than the length of the sixth arm;

[0011] Alternatively, along the second direction, the length of the first centering support is less than the length of the second centering support, the length of the second arm is less than the length of the fifth arm, and the length of the third arm is less than the length of the sixth arm.

[0012] In one specific embodiment of the present invention, a magnetic circuit system is further included, the magnetic circuit system comprising:

[0013] A magnetically conductive yoke, which is connected to the housing;

[0014] A central magnetic part is disposed on the inner side of the magnetically conductive yoke;

[0015] A side magnetic section is disposed on the inner side of the magnetic yoke, and the side magnetic section is arranged around the outside of the central magnetic section, forming a magnetic gap with the central magnetic section. The side of the voice coil away from the diaphragm assembly is disposed corresponding to the magnetic gap. The side magnetic section is arranged in a ring shape. Alternatively, the side magnetic section includes a plurality of side magnets and a side magnetic guide plate stacked on the side magnets. The plurality of side magnets are arranged in a ring shape with their ends facing each other. The first centering support and the second centering support are respectively located on the circumferential outer side of the side magnetic section.

[0016] In one specific embodiment of the present invention, the side magnetic part includes a first side magnetic part corresponding to the first centering support piece and a second side magnetic part corresponding to the second centering support piece, wherein the magnet volume of the first side magnetic part is larger than the magnet volume of the second side magnetic part.

[0017] In one specific embodiment of the present invention, the first side magnetic portion includes a first main body portion and a first protrusion portion extending outward relative to the first main body portion. Along the second direction, the extension length of the first protrusion portion is less than the extension length of the first main body portion. The second side magnetic portion includes a second main body portion and a second protrusion portion extending outward relative to the second main body portion. Along the second direction, the extension length of the second protrusion portion is less than the extension length of the second main body portion. The end faces of both the first protrusion portion and the second protrusion portion extend to the outer wall of the housing.

[0018] In one specific embodiment of the present invention, the magnets of the first main body and the second main body have the same volume, the first protrusion and the second protrusion have the same extension length along the first direction, and the extension length of the first protrusion is greater than the extension length of the second protrusion along the second direction.

[0019] In one specific embodiment of the present invention, the vibration system further includes a frame, the frame including a body portion and support portions connected to the body portion, the support portions being at least two, the end of the support portion away from the body portion extending along the vibration direction of the vibration system, one side of the body portion being connected to the diaphragm assembly, and the other side of the body portion being connected to the voice coil, wherein at least one end of the support portion away from the body portion is connected to the first internal fixing portion, and at least one end of the support portion away from the body portion is connected to the second internal fixing portion.

[0020] In one specific embodiment of the present invention, the first clearance notch is formed as a step, a slope or a groove, and the second clearance notch is formed as a step, a slope or a groove.

[0021] A second aspect of the present invention also provides an electronic device including any of the sound-generating devices described above.

[0022] The sound-generating device provided by this invention includes a housing and a vibration system. A diaphragm assembly in the vibration system is connected to the housing, and a voice coil is connected to the diaphragm assembly. This allows the voice coil to vibrate by applying electricity, thereby causing the diaphragm assembly to vibrate and generate sound. The vibration system also incorporates a first centering support and a second centering support with an electrical connection. This not only reduces the polarization of the voice coil through the first and second centering supports but also allows the second centering support to supply power to the voice coil. Furthermore, by extending the first and second connecting arms of the first and second centering supports to the housing and providing corresponding first and second clearance notches on the housing, the deformation of the first and second centering supports can be effectively increased without changing the volume of the sound-generating device. This prevents cracks or breakage of the first and second connecting arms, thereby extending the service life of the sound-generating device. Furthermore, by setting the length of the first connecting arm to be less than the length of the second connecting arm so that the structural stiffness of the first and second connecting arms is the same, the influence of the asymmetry between the first and second centering supports caused by the setting of the electrical connection part can be reduced, thereby enabling them to have the same amplitude under the same driving force, thereby reducing the polarization of the voice coil, improving the operational stability of the vibration system, and enhancing the acoustic performance of the sound-generating device. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is an exploded view of the sound-generating device in an embodiment of the present invention;

[0025] Figure 2-3 These are partial structural schematic diagrams of the sound-generating device in two different embodiments of the present invention;

[0026] Figure 4 This is a partial structural schematic diagram of the sound-generating device in an embodiment of the present invention;

[0027] Figures 5-6 This is a schematic diagram of the connection structure between the skeleton and the voice coil in an embodiment of the present invention;

[0028] Figures 7-8 This is a schematic diagram of the skeleton structure in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100 - Sound-generating device;

[0031] 10 - Shell, 11 - Second clearance notch;

[0032] 20-Vibration system, 11-Diaphragm assembly, 111-Diaphragm, 112-Vibrating plate, 12-Frame, 121-Main body, 122-Connecting foot, 123-Boss, 124-Leading wire groove, 13-Voice coil, 14-Ventilation hole;

[0033] 30-Magnetic circuit system, 31-Magnetic yoke, 32-Central magnetic part, 33-Central magnet, 34-Central magnetic plate, 35-Side magnetic part, 36-Side magnet, 361-First side magnetic part, 362-First main body part, 363-First protrusion, 364-Second side magnetic part, 365-Second main body part, 366-Second protrusion, 367-Third side magnetic part, 368-Third main body part, 369-Third protrusion, 37-Side magnetic plate;

[0034] 41-First centering support, 42-First external fixation part, 43-First internal fixation part, 44-First connecting arm, 441-First arm, 442-Second arm, 443-Third arm, 45-Second centering support, 46-Second external fixation part, 47-Second internal fixation part, 48-Second connecting arm, 481-Fourth arm, 482-Fifth arm, 483-Sixth arm. Detailed Implementation

[0035] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0036] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0037] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0038] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0039] This invention provides a sound-generating device 100 and an electronic device including the sound-generating device 100. The electronic device can effectively improve the polarization caused by the difference in the structure of the centering support plate under the condition of limited structural size, thereby effectively improving the acoustic performance of the sound-generating device 100.

[0040] Reference Figures 1-8The first aspect of the present invention provides a sound-generating device 100, including a housing 10 and a vibration system 20. The vibration system 20 includes a diaphragm assembly 11, a voice coil 13, a first centering support 41, and a second centering support 45 with an internal electrical connection. The outer periphery of the diaphragm assembly 11 is fixed to the housing 10. One end of the voice coil 13 is connected to the diaphragm assembly 11. The first centering support 41 and the second centering support 45 are respectively disposed at both ends of the housing 10. The first centering support 41 includes a first inner fixing part 43, a first connecting arm 44, and a first outer fixing part 42 connected in sequence. The second centering support 45... 5 includes a second inner fixing part 47, a second connecting arm 48, and a second outer fixing part 46 connected in sequence; the first outer fixing part 42 and the second outer fixing part 46 are respectively connected to the housing 10, and the lead part of the voice coil 13 is electrically connected to the second centering support 45; wherein, the length of the first connecting arm 44 is less than the length of the second connecting arm 48 so that the structural stiffness of the first connecting arm 44 and the second connecting arm 48 is the same, and along the vibration direction of the vibration system 20, the housing 10 is provided with a first clearance notch for the first connecting arm 44 and a second clearance notch 11 for the second connecting arm 48.

[0041] Specifically, the housing 10 is formed as a hollow frame structure, and along its axial direction, the housing 10 has a first side and a second side that are arranged opposite to each other. The material of the housing 10 can be a metal material or a plastic material.

[0042] In the vibration system 20, the diaphragm assembly 11 includes a diaphragm 111 with a folded portion and a diaphragm plate 112 connected to the center of the diaphragm 111, wherein the outer periphery of the diaphragm 111 is connected to the first side of the housing 10. The voice coil 13 is arranged in a ring shape, and its axial top is connected to the diaphragm plate 112.

[0043] In the vibration system 20, a first centering support plate 41 and a second centering support plate 45 are respectively disposed at both ends of the housing 10. The first centering support plate 41 includes a first inner fixing part 43, a first connecting arm 44, and a first outer fixing part 42 connected in sequence. The first inner fixing part 43 is connected to the diaphragm assembly 11, and the first outer fixing part 42 is connected to the housing 10. The second centering support plate 45 includes a second inner fixing part 47, a second connecting arm 48, and a second outer fixing part 46 connected in sequence. The second inner fixing part 47 is connected to the diaphragm assembly 11, and the second outer fixing part 46 is connected to the housing 10. Thus, the first centering support plate 41 and the second centering support plate 45 are connected between the housing 10 and the diaphragm assembly 11, thereby reducing the polarization of the vibration system 20. The second centering support 45 also has an electrical connection portion extending from the second inner fixing portion 47 to the second outer fixing portion 46. One end of the electrical connection portion is connected to the lead wire of the voice coil 13, and the other end of the electrical connection portion is electrically connected to the power line outside the sound generating device 100, thereby realizing the power supply to the voice coil 13.

[0044] Meanwhile, by optimizing the structure of the first centering support plate 41 and the second centering support plate 45, and extending the first connecting arm 44 and the second connecting arm 48 to the housing 10, and setting the first clearance notch and the second clearance notch 11 corresponding to the first connecting arm 44 at the corresponding position in the housing 10, the extension length of the first centering support plate 41 and the second centering support plate 45 can be increased without changing the volume of the sound generating device 100. This effectively increases the deformation of the first centering support plate 41 and the second centering support plate 45, which can not only meet the requirements of large amplitude vibration, but also prevent the first connecting arm 44 and the second connecting arm 48 from cracking or breaking, thereby extending the service life of the sound generating device 100.

[0045] Furthermore, by adjusting the lengths of the first connecting arm 44 and the second connecting arm 48, and making the length of the first connecting arm 44 less than the length of the second connecting arm 48, the structural stiffness of the first connecting arm 44 and the second connecting arm 48 can be coordinated, reducing the problem of different amplitudes between the second connecting arm 48 and the first connecting arm 44 due to the presence of an electrical connection part. This allows the first centering support plate 41 and the second centering support plate 45 to have the same amplitude under the same driving force, thereby reducing the polarization of the vibration system, improving the operational stability of the vibration system 20, and ultimately improving the acoustic performance of the sound-generating device 100.

[0046] The sound-generating device 100 provided in this embodiment of the invention includes a housing 10 and a vibration system 20, wherein a diaphragm assembly 11 in the vibration system 20 is connected to the housing 10, and a voice coil 13 is connected to the diaphragm assembly 11. Thus, by energizing the voice coil 13, it can be driven to vibrate, thereby causing the diaphragm assembly 11 to vibrate and generate sound. The vibration system 20 also provides a first centering support 41 and a second centering support 45 with an electrical connection portion. Thus, not only can the first centering support 41 and the second centering support 45 reduce the polarization generated by the voice coil 13 during vibration, but the second centering support 45 can also supply power to the voice coil 13. Meanwhile, by extending the first connecting arm 44 and the second connecting arm 48 of the first centering support plate 41 and the second centering support plate 45 to the housing 10 and providing corresponding first clearance notches and second clearance notches 11 on the housing 10, the deformation of the first centering support plate 41 and the second centering support plate 45 can be effectively increased without changing the volume of the sound-generating device 100. This avoids cracks or breaks in the first connecting arm 44 and the second connecting arm 48, thereby extending the service life of the sound-generating device 100. In addition, by setting the length of the first connecting arm 44 to be less than the length of the second connecting arm 48 so that the structural stiffness of the first connecting arm 44 and the second connecting arm 48 is the same, the asymmetry between the first centering support plate 41 and the second centering support plate 45 caused by the setting of the electrical connection part can be reduced. This allows the first centering support plate 41 and the second centering support plate 45 to have the same amplitude under the same driving force, thereby reducing the polarization of the voice coil 13, improving the operational stability of the vibration system 20, and enhancing the acoustic performance of the sound-generating device 100.

[0047] In one embodiment, the first connecting arm 44 includes a first arm 441, a second arm 442, and a third arm 443 connected in sequence. The first arm 441 is connected to the first inner fixing part 43, and the third arm 443 is connected to the first outer fixing part 42. The second connecting arm 48 includes a fourth arm 481, a fifth arm 482, and a sixth arm 483 connected in sequence. The fourth arm 481 is connected to the second inner fixing part 47, and the sixth arm 483 is connected to the second outer fixing part 46. The housing 10 has a first direction and a second direction that are perpendicular to each other. The first arm 441 and the fourth arm 481 are arranged along the first direction, and the second arm 442, the third arm 443, the fifth arm 482, and the sixth arm 483 are arranged along the second direction. A first clearance notch avoids the third arm 443, and a second clearance notch 11 avoids the sixth arm 483.

[0048] Specifically, the housing 10 can be formed into a square structure, with its major axis in the first direction and its minor axis in the second direction, the first and second directions being perpendicular to each other. In the first connecting arm 44, the first arm 441, the second arm 442, and the third arm 443 are connected to each other by a bending portion, and the connected first arm 441 extends along the first direction, while the second arm 442 and the third arm 443 are arranged in a U-shape and extend along the second direction; in the second connecting arm 48, the fourth arm 481, the fifth arm 482, and the sixth arm 483 are connected to each other by a bending portion, and the connected fourth arm 481 extends along the first direction, while the fifth arm 482 and the sixth arm 483 are arranged in a U-shape and extend along the second direction. The orthographic projections of the third arm 443 and the sixth arm 483 overlap with the short axis of the housing 10. The first clearance notch and the second clearance notch 11 are provided on the second side of the housing 10, and specifically provided at the overlapping position of the third arm 443 and the sixth arm 483 in the short axis of the housing 10, so as to achieve clearance for the third arm 443 and the sixth arm 483, thereby extending the length of the first connecting arm 44 and the second connecting arm 48.

[0049] Of course, in some embodiments, the shapes of the first centering support plate 41 and the second centering support plate 45 can be adjusted so that the first connecting arm 44 and the second connecting arm 48 extend to the long axis of the housing 10 and correspond to the first clearance notch and the second clearance notch 11 provided on the long axis.

[0050] In one embodiment, along the second direction, the length of the first centering support 41 is the same as the length of the second centering support 45, the length of the first external fixing part 42 is greater than the length of the second external fixing part 46, and the length of the third arm 443 is less than the length of the sixth arm 483.

[0051] Specifically, in the first centering support plate 41 and the second centering support plate 45, the first external fixing part 42 and the third arm 443 are both arranged along the second direction, and the second external fixing part 46 and the sixth arm 483 are both arranged along the second direction. Thus, when the lengths of the first centering support plate 41 and the second centering support plate 45 along the second direction are the same, the length of the sixth arm 483 can be extended by relatively reducing the length of the second external fixing part 46 so that the length of the third arm 443 is less than the length of the sixth arm 483, thereby making the length of the first connecting arm 44 less than the length of the second connecting arm 48.

[0052] Correspondingly, along the second direction, the length of the second clearance gap 11 is greater than the length of the first clearance gap, and the excess length is the length extending in the direction of the second fixing part.

[0053] In one embodiment, along the second direction, the length of the first centering support 41 is less than the length of the second centering support 45, the length of the second arm 442 is less than the length of the fifth arm 482, and the length of the third arm 443 is less than the length of the sixth arm 483.

[0054] Specifically, in this embodiment, the sixth arm 483 is extended in the direction away from the second external fixing part 46 so that its length is greater than the length of the third arm 443. Correspondingly, the length of the fifth arm 482 is also extended in sync, and thus greater than the length of the second arm 442, so that the length of the second connecting arm 48 is greater than the length of the first connecting arm 44.

[0055] Correspondingly, along the second direction, the length of the second clearance notch 11 also extends in the direction away from the second outer fixing part 46 and is greater than the length of the first clearance notch.

[0056] In one embodiment, a magnetic circuit system 30 is also included. The magnetic circuit system 30 includes a magnetic yoke 31, a central magnetic part 32, and a side magnetic part 35. The magnetic yoke 31 is connected to the housing 10. The central magnetic part 32 is disposed on the inner side of the magnetic yoke 31. The side magnetic part 35 is disposed on the inner side of the magnetic yoke 31 and is arranged around the central magnetic part 32, forming a magnetic gap with the central magnetic part 32. The side of the voice coil 13 away from the diaphragm assembly 11 is disposed corresponding to the magnetic gap. The side magnetic part 35 is arranged in a ring. Alternatively, the side magnetic part 35 includes a plurality of side magnets 36 and a side magnetic guide plate 37 stacked on the side magnets 36. The plurality of side magnets 36 are arranged in a ring with their ends facing each other. The first centering support plate 41 and the second centering support plate 45 are respectively located on the circumferential outer side of the side magnetic part 35.

[0057] Specifically, the magnetic yoke 31 is formed as a flat plate structure and is specifically connected to the second side of the housing 10. The central magnetic part 32 and the side magnetic part 35 are both disposed on the inner side of the magnetic yoke 31 facing the vibration system 20, and the side magnetic part 35 is arranged around the outer side of the central magnetic part 32. Thus, a magnetic gap is formed between the central magnetic part 32 and the side magnetic part 35, which allows the bottom of the voice coil 13 to be inserted, thereby providing a magnetic field for the voice coil 13 to vibrate in the magnetic gap.

[0058] The central magnetic part 32 includes a central magnet 33 connected to the magnetic yoke 31 and a central magnetic plate 34 stacked on the central magnet 33. The outer contours of the central magnet 33 and the central magnetic plate 34 are approximately the same.

[0059] The edge magnetic section 35 includes an edge magnet 36 connected to the magnetic yoke 31 and edge magnetic guide plates 37 stacked on the edge magnet 36. The edge magnet 36 can be a ring magnet, or it can be composed of multiple bar magnets arranged in a ring with their ends facing each other. The edge magnetic guide plates 37 can be formed as a ring or as multiple bar magnetic guide plates. The arrangement of the edge magnetic guide plates 37 can be the same as or different from that of the edge magnet 36, depending on the specific requirements.

[0060] The first centering support plate 41 and the second centering support plate 45 are disposed on the outer circumferential side of the side magnetic part 35 and are connected to the frame 12 and the housing 10 on the outer circumferential side of the side magnetic part 35.

[0061] In this embodiment, by setting an annular side magnet 36 or by enclosing the strip side magnet 36 to form an annular shape, the volume of the side magnet 36 can be effectively increased without changing the volume of the sound-generating device 100, thereby increasing the magnetic field strength, improving the overall BL value of the sound-generating device 100, and thus improving the sensitivity of the sound-generating device 100.

[0062] Optionally, a trace gap can be provided between two adjacent side magnets 36, and the lead of the voice coil 13 can be extended through the trace gap to the outside of the side magnet 35 to be electrically connected to the pad on the second centering support 45.

[0063] In one embodiment, the side magnetic part 35 includes a first side magnetic part 361 corresponding to the first centering support piece 41 and a second side magnetic part 364 corresponding to the second centering support piece 45, wherein the magnet volume of the first side magnetic part 361 is larger than the magnet volume of the second side magnetic part 364.

[0064] This embodiment can be used in embodiments where the length of the first centering support plate 41 along the second direction is less than the length of the second centering support plate 45. In this case, by reducing the magnet volume of the second side magnet 364, space is made for the second centering support plate 45 to extend the length of its second connecting arm 48, thereby coordinating the amplitudes of the first centering support plate 41 and the second centering support plate 45.

[0065] In embodiments where the length of the first centering support 41 along the second direction is equal to that of the second centering support 45, the volumes of the first side magnetic part 361 and the second side magnetic part 364 may be the same.

[0066] In one embodiment, the first side magnetic portion 361 includes a first main body portion 362 and a first protrusion 363 extending outward relative to the first main body portion 362. Along the second direction, the extension length of the first protrusion 363 is less than the extension length of the first main body portion 362. The second side magnetic portion 364 includes a second main body portion 365 and a second protrusion 366 extending outward relative to the second main body portion 365. Along the second direction, the extension length of the second protrusion 366 is less than the extension length of the second main body portion 365. The end faces of both the first protrusion 363 and the second protrusion 366 extend to the outer side wall of the housing 10.

[0067] Specifically, the side magnetic portion 35 also includes a third side magnetic portion 367 connected between the first side magnetic portion 361 and the second side magnetic portion 364 to form a ring structure. The third side magnetic portion 367 includes a third main body portion 368 and a third protrusion 369 extending outward relative to the third main body portion 368. The first main body portion 362, the second main body portion 365, and the third main body portion 368 are all arranged facing the magnetic gap, while the first protrusion portion 363, the second protrusion portion 366, and the third protrusion portion 369 are all arranged away from the magnetic gap. The ends of the first main body portion 362, the second main body portion 365, and the third main body portion 368 are arranged relatively close to each other to form a ring. The end faces of the first protrusion portion 363, the second protrusion portion 366, and the third protrusion portion 369 all extend to the outer side wall of the housing 10. A space is formed between the first protrusion portion 363 and the third protrusion portion 369, and between the second protrusion portion 366 and the third protrusion portion 369 to avoid the first centering support piece 41 and the second shaping support piece.

[0068] Correspondingly, there are two first centering support plates 41 and two second centering support plates 45. The two first centering support plates 41 are respectively disposed at both ends of the first protrusion 363, and the two second centering support plates 45 are respectively disposed at both ends of the second protrusion 366.

[0069] This embodiment optimizes the structure of the first side magnet 361, the second side magnet 364, and the third side magnet 367. This effectively increases the volume of the side magnet 36 without changing the volume of the sound-generating device 100 and freeing up space for the first centering support plate 41 and the second centering support plate 45. This increases the magnetic field strength, improves the overall BL value of the sound-generating device 100, and thus enhances the sensitivity of the sound-generating device 100.

[0070] In one embodiment, the magnets of the first main body 362 and the second main body 365 have the same volume. Along the first direction, the first protrusion 363 and the second protrusion 366 have the same extension length. Along the second direction, the extension length of the first protrusion 363 is greater than the extension length of the second protrusion 366. This reduces the length of the second protrusion 366 in the second direction, thereby freeing up installation space for the second centering support 45, whose length in the second direction is greater than that of the first centering support 41. Furthermore, through the above arrangement, the magnet volume of the first side magnetic part 361 is greater than the magnet volume of the second side magnetic part 364, thereby increasing the magnetic field strength B value on one side of the first centering support 41, thus increasing the magnetic field driving force on one side of the first centering support 41, and thereby improving the sound-generating sensitivity of the sound-generating device 100.

[0071] In one embodiment, the vibration system 20 further includes a frame 12, which includes a body portion and support legs connected to the body portion. There are at least two support legs, with one end of the support leg away from the body portion extending along the vibration direction of the vibration system 20. One side of the body portion is connected to the diaphragm assembly 11, and the other side of the body portion is connected to the voice coil 13. At least one end of the support leg away from the body portion is connected to the first internal fixing portion 43, and at least one end of the support leg away from the body portion is connected to the second internal fixing portion 47.

[0072] Specifically, the main body 121 is arranged in a ring shape, with one side of the main body 121 connected to the diaphragm 112 and the other side of the main body 121 connected to the voice coil 13. The support foot is arranged on the outer periphery of the main body 121 and specifically corresponds to the first centering support plate 41 or the second centering support plate 45. One end of the support foot is connected to the main body 121, and the other end extends along the vibration direction of the vibration system 20 on the outer periphery of the side magnet 35, and then connects to the first inner fixing part 43 of the first centering support plate 41 or the second inner fixing part 47 of the second centering support plate 45.

[0073] In this embodiment, the vibration system 20 is connected to the first centering support plate 41 and the second centering support plate 45 through the skeleton 12, thereby reducing the polarization of the vibration system 20 and improving the reliability of the sound-generating unit. Furthermore, compared to the method in related technologies where the voice coil 13 is connected to the first centering support plate 41 and the second centering support plate 45, this embodiment, by using the skeleton 12 to connect the vibration system 20 to the first centering support plate 41 and the second centering support plate 45, can further reduce the space occupied by the voice coil 13, which is beneficial for the side magnet 35 to surround the voice coil 13 completely, and for further increasing the volume of the side magnet 35, thereby improving the BL value of the sound-generating device 100 and thus enhancing the sensitivity of the product.

[0074] In one embodiment, the main body 121 has protrusions 123 spaced apart along the axial direction of the voice coil 13 on its side facing the voice coil 13, with a gap between adjacent protrusions 123. The protrusions 123 extend away from the diaphragm assembly 11 relative to the main body 121. The voice coil 13 is connected to the protrusions 123, and the top of the voice coil 13 and the gap form a vent hole 14. This allows the vent hole 14 to connect the inner and outer sides of the voice coil 13, thereby dissipating heat generated inside the voice coil 13 due to electrical conduction to the outer side of the voice coil 13. This facilitates heat dissipation to the outside of the sound-generating device 100, thus improving the reliability and service life of the sound-generating device 100.

[0075] In one embodiment, a lead wire groove 124 is provided on the support foot corresponding to the second centering support piece 45. The lead wire of the voice coil 13 is fixed to the lead wire groove 124 by fixing adhesive and guided through the lead wire groove 124 to the electrical connection part of the second centering support piece 45 for electrical connection.

[0076] Specifically, there are four support feet, and lead grooves 124 are provided on the two support feet corresponding to the second centering support plate 45. The electrical connection part includes a first pad provided on the second inner fixing part 47, a second pad provided on the second outer fixing part 46, and an electrical connector connecting the first pad and the second pad. The two leads of the voice coil 13 are respectively guided through the two lead grooves 124 to the first pads of the two second inner fixing parts 47 for electrical connection with the first pads.

[0077] In this embodiment, by providing a lead wire groove 124 on the support foot to fix the lead wire of the voice coil 13, the stability of the voice coil 13 can be improved, thereby improving the stability of the sound generating device 100.

[0078] In one embodiment, the first clearance notch is formed as a step, a ramp, or a groove, and the second clearance notch 11 is formed as a step, a ramp, or a groove.

[0079] Specifically, the first clearance notch is formed as a step, or the first clearance portion is formed as a slope, or the first clearance portion is formed as a groove. The second clearance notch 11 is formed as a step, or the second clearance portion is formed as a slope, or the second clearance portion is formed as a groove. The structures of the first clearance portion and the second clearance portion can be the same or different, depending on the actual needs.

[0080] When the clearance is formed as a step or slope, the distance between the end of the step closer to the first internal fixing part 43 and the first side surface is smaller than the distance between the end of the step farther from the first internal fixing part 43 and the first side surface.

[0081] A second aspect of the present invention also provides an electronic device including a sound-generating device 100 as described above. The structure of the sound-generating device 100 is as described in the above embodiments. Since the electronic device in this embodiment includes the sound-generating device 100 in all the above embodiments, it also has at least all of the above-described beneficial effects, which will not be repeated here.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sound-generating device, characterized in that, The device includes a housing and a vibration system. The vibration system includes a diaphragm assembly, a voice coil, a first centering support, and a second centering support with an internal electrical connection. The outer periphery of the diaphragm assembly is fixed to the housing. One end of the voice coil is connected to the diaphragm assembly. The first centering support and the second centering support are respectively disposed at both ends of the housing. The first centering support includes a first inner fixing part, a first connecting arm, and a first outer fixing part connected in sequence. The second centering support includes a second inner fixing part, a second connecting arm, and a second outer fixing part connected in sequence. The first outer fixing part and the second outer fixing part are respectively connected to the housing. The lead portion of the voice coil is electrically connected to the second centering support. Wherein, the length of the first connecting arm is less than the length of the second connecting arm so that the structural stiffness of the first connecting arm and the second connecting arm is the same. Along the vibration direction of the vibration system, the housing is provided with a first clearance notch for the first connecting arm and a second clearance notch for the second connecting arm. The first connecting arm includes a first arm, a second arm, and a third arm connected in sequence. The first arm is connected to the first internal fixing part, and the third arm is connected to the first external fixing part. The second connecting arm includes a fourth arm, a fifth arm, and a sixth arm connected in sequence. The fourth arm is connected to the second internal fixing part, and the sixth arm is connected to the second external fixing part. The housing has a first direction and a second direction that are perpendicular to each other. The first arm and the fourth arm are arranged along the first direction, and the second arm, the third arm, the fifth arm and the sixth arm are arranged along the second direction. The first clearance notch avoids the third arm, and the second clearance notch avoids the sixth arm. Along the second direction, the length of the first centering support is less than the length of the second centering support, the length of the second arm is less than the length of the fifth arm, and the length of the third arm is less than the length of the sixth arm; It also includes a magnetic circuit system, which comprises: A magnetically conductive yoke, which is connected to the housing; A central magnetic part is disposed on the inner side of the magnetically conductive yoke; A side magnetic portion is disposed on the inner side of the magnetic yoke, and the side magnetic portion is arranged around the central magnetic portion, forming a magnetic gap with the central magnetic portion. The side of the voice coil away from the diaphragm assembly is disposed corresponding to the magnetic gap. The side magnetic portion includes a first side magnetic portion disposed corresponding to the first centering support and a second side magnetic portion disposed corresponding to the second centering support. The first side magnetic portion includes a first main body and a first protrusion extending outward relative to the first main body. The second side magnetic portion includes a second main body and a second protrusion extending outward relative to the second main body. Along the second direction, the extension length of the first protrusion is greater than the extension length of the second protrusion.

2. The sound-generating device according to claim 1, characterized in that, The side magnetic section includes a plurality of side magnets and a side magnetic plate stacked on the side magnets. The plurality of side magnets are arranged in a ring with their ends facing each other. The first centering support plate and the second centering support plate are respectively located on the circumferential outer side of the side magnetic section.

3. The sound-generating device according to claim 2, characterized in that, The volume of the magnet in the first side magnetic part is larger than the volume of the magnet in the second side magnetic part.

4. The sound-generating device according to claim 3, characterized in that, Along the second direction, the extension length of the first protrusion is less than the extension length of the first main body, and along the second direction, the extension length of the second protrusion is less than the extension length of the second main body. The end faces of both the first protrusion and the second protrusion extend to the outer wall of the housing.

5. The sound-generating device according to claim 4, characterized in that, The magnets in the first main body and the second main body have the same volume, and the first protrusion and the second protrusion have the same extension length along the first direction.

6. The sound-generating device according to claim 1, characterized in that, The vibration system further includes a frame, which includes a body and legs connected to the body. There are at least two legs. The end of each leg away from the body extends along the vibration direction of the vibration system. One side of the body is connected to the diaphragm assembly, and the other side of the body is connected to the voice coil. At least one end of each leg away from the body is connected to the first internal fixing part, and at least one end of each leg away from the body is connected to the second internal fixing part.

7. The sound-generating device according to claim 1, characterized in that, The first clearance notch is formed as a step, a slope, or a groove, and the second clearance notch is formed as a step, a slope, or a groove.

8. An electronic device, characterized in that, Includes the sound-generating device according to any one of claims 1-7.

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