Sound production device, sound production module and electronic equipment

Abstract

The utility model discloses a sounding device, a sounding module and electronic equipment, and relates to the technical field of electroacoustic transduction, a magnetic circuit system of the sounding device is provided with a mounting hole penetrating through a magnetic conductive yoke and a central magnetic part, and a conductive bracket is arranged in the mounting hole; a vibrating diaphragm assembly of the vibrating system comprises a vibrating part, a first folding ring part arranged on the outer side of the vibrating part and a second folding ring part arranged on the inner side of the vibrating part, the inner side of the second folding ring part is connected with a conductive support, one end of a centering disk is electrically connected with a bonding pad of the conductive support, and the other end of the centering disk is connected with the vibrating diaphragm assembly. And the coil is electrically connected with a lead of the voice coil. According to the sounding device, the magnetic circuit system is arranged in a hollow manner and is provided with the conductive support, and the centering disk is electrically connected with the voice coil and the conductive support respectively, so that the setting volume of the edge magnetic part can be increased, the magnetic field intensity can be improved, the BL value of a product can be increased, and the acoustic performance can be improved; in addition, the sound production device is low in magnetic flux leakage and meets the use requirements.

Description

Technical Field

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

[0002] In recent years, with the rapid development of consumer electronics, electronic devices such as smartphones and VR devices have gained consumer acceptance and widespread application. Those skilled in the art have also made corresponding improvements to related supporting products, such as headphones, to meet the performance requirements of electronic products and satisfy consumers' needs for product performance.

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

[0004] In related technologies, sound-generating devices typically employ a centering support structure, with the centering supports positioned at the four corners or the short axis of the sound-generating device. This occupies part of the space in the magnetic circuit system, limiting the size of the side magnets and thus reducing the magnetic field strength and BL value of the magnetic circuit system, thereby affecting the acoustic performance of the sound-generating device. Utility Model Content

[0005] The main purpose of this invention is to provide a sound-generating device, a sound-generating module, and an electronic device. The aim is to provide a sound-generating device that effectively increases the magnetic field strength of a magnetic circuit system. This sound-generating device effectively improves the magnetic field strength and increases the BL value, thereby enhancing acoustic performance.

[0006] To achieve the above objectives, this utility model proposes a sound-generating device, which includes:

[0007] A magnetic circuit system, the magnetic circuit system including a magnetic yoke and a central magnetic part and a side magnetic part disposed on the magnetic yoke, the side magnetic part being located outside the central magnetic part and forming a magnetic gap with the central magnetic part, the magnetic circuit system having a mounting hole penetrating the magnetic yoke and the central magnetic part;

[0008] A conductive support, wherein the conductive support is disposed within the mounting hole; and

[0009] A vibration system includes a diaphragm assembly, a voice coil, and a centering support. The diaphragm assembly includes a vibrating part, a first folded ring portion disposed outside the vibrating part, and a second folded ring portion disposed inside the vibrating part. The inner side of the second folded ring portion is connected to the conductive support. One end of the voice coil is connected to the vibrating part, and the other end of the voice coil is suspended in the magnetic gap. One end of the centering support is electrically connected to the pad of the conductive support, and the other end of the centering support is connected to the diaphragm assembly and electrically connected to the lead wire of the voice coil.

[0010] In one embodiment, the centering support includes a main body and a leg. The main body is connected to the conductive support and electrically connected to the pads of the conductive support. One end of the leg is connected to the main body, and the other end of the leg is connected to the vibrating part and electrically connected to the lead of the voice coil.

[0011] In one embodiment, the outriggers include two legs, which are arranged symmetrically.

[0012] And / or, the support leg includes a first support leg and a second support leg connected to each other, the first support leg extends along the short axis of the main body and is connected to the main body, the second support leg extends along the long axis of the main body and is connected to the vibration part, and along the vibration direction of the vibration system, the second folding ring is opposite to the first support leg and the second support leg respectively;

[0013] And / or, the main body and the support leg are integrally formed;

[0014] And / or, the main body and the support leg are located on the same plane;

[0015] And / or, the main body is provided with a first pad, and the leg is provided with a second pad at the end away from the main body. The first pad is electrically connected to the pad of the conductive bracket, and the second pad is electrically connected to the lead of the voice coil.

[0016] In one embodiment, along the vibration direction of the vibration system, the second folded ring portion extends protruding away from the support leg portion and is disposed opposite to the support leg portion.

[0017] In one embodiment, the central magnet is provided with a clearance structure corresponding to the support leg, and the clearance structure is connected to the mounting hole;

[0018] The clearance structure is a groove formed by the central magnetic part being recessed towards the magnetic yoke; or, the clearance structure is a through hole structure that passes through the central magnetic part.

[0019] In one embodiment, the central magnetic part includes a central magnet and a central washer stacked together, the central magnet being sandwiched between the central washer and the magnetic yoke, and the mounting hole passing through the magnetic yoke, the central magnet and the central washer in sequence;

[0020] The central washer has a recessed groove in the direction away from the diaphragm assembly to form a clearance structure for avoiding the centering support plate; or, the central washer has a first recessed groove in the direction away from the diaphragm assembly, and the central magnet has a second recessed groove in the direction away from the diaphragm assembly, the first groove and the second groove are connected and together form a clearance structure for avoiding the centering support plate.

[0021] In one embodiment, a portion of the center washer is recessed in a direction away from the diaphragm assembly to form a clearance region. One end of the clearance region is connected to the clearance structure, and the other end of the clearance region extends toward the periphery of the center washer. The clearance region is configured to correspond to the lead wire of the voice coil.

[0022] And / or, the central magnet is arranged in a ring; or, the central magnet includes multiple central magnets, which are arranged in a ring to form the mounting hole;

[0023] And / or, the central washer is arranged in a ring; or, the central washer includes multiple central washers, and the multiple central washers are arranged in a ring to form the mounting hole.

[0024] In one embodiment, the first folded ring portion, the vibrating portion, and the second folded ring portion are integrally formed structures;

[0025] Alternatively, the vibrating part may be formed as a vibrating plate, which may be bonded to the first folded ring and the second folded ring respectively or integrally injection molded, and the vibrating plate may be made of metal or fiber material.

[0026] In one embodiment, the outer periphery of the vibrating part forms a first stepped surface, and the inner periphery of the vibrating part forms a second stepped surface;

[0027] The inner side of the first folded ring extends along the vibration direction perpendicular to the vibration system to form an inner fixing part, and the outer side of the second folded ring extends along the vibration direction perpendicular to the vibration system to form an outer fixing part;

[0028] The internal fixing part overlaps with the first step surface and is bonded to the first step surface, while the external fixing part overlaps with the second step surface and is bonded to the second step surface.

[0029] In one embodiment, the side of the internal fixing part facing away from the first stepped surface is flush with the vibrating part;

[0030] And / or, the side of the external fixing part facing away from the second step surface is flush with the vibration part;

[0031] And / or, the second folded ring protrudes toward the side away from the magnetic circuit system, and the first folded ring protrudes toward the side closer to the magnetic circuit system.

[0032] In one embodiment, the inner side of the second folded ring is provided with a hollow hole, and part of the centering support piece is exposed in the hollow hole.

[0033] In one embodiment, the conductive support has a first welding surface and a second welding surface that are opposite to each other. The first welding surface faces the centering support and is connected to the centering support. The second welding surface is used to connect to an external power source.

[0034] Along the vibration direction of the vibration system, the first welding surface is higher than the side surface of the central magnet facing the diaphragm assembly.

[0035] In one embodiment, the conductive support has a groove on the side opposite to the first welding surface, and the bottom wall of the groove forms the second welding surface;

[0036] And / or, the conductive support includes a main body and a pad, the pad being embedded in the main body, the pad including a first pad portion and a second pad portion connected to each other, at least a portion of the first pad portion being exposed on the first welding surface, and at least a portion of the second pad portion being exposed on the second welding surface.

[0037] In one embodiment, the conductive support and the magnetic yoke are integrally injection molded;

[0038] And / or, the conductive support includes a main body and solder pads, the main body is a plastic material, the solder pads are injection molded into the main body, the main body includes a first connecting portion and a second connecting portion disposed on the side of the first connecting portion near the diaphragm assembly, the first connecting portion is connected to the magnetic yoke, and the second connecting portion is connected to the centering support; wherein, the second connecting portion extends recessed relative to the first connecting portion in a direction away from the central magnet to form a clearance space to avoid the centering support.

[0039] In one embodiment, the edge magnetic portion includes a layered edge magnet and an edge washer, with the edge magnet sandwiched between the magnetic yoke and the edge washer;

[0040] Both the side magnets and the side washer form a closed ring structure; or, there are multiple side magnets and side washers, and they are arranged in a one-to-one correspondence, with adjacent side magnets connected end to end to form a closed ring structure.

[0041] In one embodiment, the magnetic yoke is further provided with a groove on the side facing away from the diaphragm assembly. One end of the groove is connected to the mounting hole, and the other end of the groove extends toward the periphery of the magnetic yoke. The groove is used to avoid wiring.

[0042] This utility model also proposes a sound-generating module, the sound-generating module comprising:

[0043] Module housing;

[0044] The aforementioned sound-generating device is disposed within the module housing; and

[0045] A flexible circuit board, one end of which is electrically connected to the conductive support of the sound-generating device, and the other end of which is used to connect to an external power source.

[0046] This utility model also proposes an electronic device, which includes the sound-generating device described above;

[0047] Alternatively, the electronic device may include the sound-generating module described above.

[0048] The sound-generating device of this utility model sets the magnetic circuit system as a magnetic yoke, with a central magnetic part and a side magnetic part located on the yoke. The side magnetic part is located outside the central magnetic part and forms a magnetic gap with the central magnetic part. The vibration system is set as a diaphragm assembly, a voice coil, and a centering support opposite to the magnetic circuit system. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is suspended in the magnetic gap. When current is passed through the voice coil, the voice coil converts electrical energy into mechanical energy within the magnetic gap formed by the magnetic circuit system, driving the voice coil to vibrate the diaphragm assembly, thereby achieving sound generation. By providing mounting holes through the magnetic yoke and the central magnetic part in the magnetic circuit system, and placing conductive supports within these holes, one end of the centering support is electrically connected to the pads of the conductive supports, while the other end is connected to the diaphragm assembly and the voice coil leads. This allows for both the mounting and fixing of the centering support, and also enables the voice coil to be connected to external circuitry via the centering support and the conductive supports. Furthermore, the centering support effectively prevents the voice coil from wobbling or polarizing, improving the acoustic performance of the sound-generating device. Additionally, the magnetic field utilization rate of the central magnetic part in the magnetic circuit system is... A mounting hole is positioned at the high center, which achieves both weight reduction and secure mounting of the conductive support. Furthermore, since the centering support is located in the center of the diaphragm assembly and connected to the conductive support within the mounting hole in the center magnet, the centering support does not occupy space in the side magnet section, thus increasing the volume of the side magnet section. Additionally, by configuring the diaphragm assembly as a vibrating section, a first folded ring section located outside the vibrating section, and a second folded ring section located inside the vibrating section, the inner side of the second folded ring section is connected to the conductive support, and the second folded ring section of the diaphragm assembly provides support for the centering support. The clearance space reduces the clearance required for the centering support plate in the central magnet section, thereby increasing the volume of the central magnet section and thus improving the magnetic field strength of the magnetic circuit system. This, in turn, increases the BL value and improves the acoustic performance of the sound-generating device. Furthermore, since there is magnetic leakage at the center of the central magnet section, the mounting hole needs to be formed by removing at least a portion of the central magnet at the center of the central magnet section. This reduces the amount of magnetic leakage from the central magnet. When the sound-generating device is assembled with electronic equipment, it reduces the impact of magnetic leakage from the central magnet in the sound-generating device on the performance of the electronic equipment, meeting the electronic equipment's requirements for magnetic leakage. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0050] Figure 1A schematic diagram of the structure of an embodiment of the sound-generating device provided by this utility model;

[0051] Figure 2 A schematic diagram of the structure of an embodiment of the sound-generating device provided by this utility model from another perspective;

[0052] Figure 3 An exploded view of an embodiment of the sound-generating device provided by this utility model;

[0053] Figure 4 A cross-sectional schematic diagram of an embodiment of the sound-generating device provided by this utility model;

[0054] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0055] Figure 6 A cross-sectional schematic diagram from another perspective of an embodiment of the sound-generating device provided by this utility model;

[0056] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0057] Figure 8 This is a schematic diagram of the connection between the vibrating part, the voice coil, and the centering support in one embodiment of the present invention;

[0058] Figure 9 This is a schematic diagram of the central washer in one embodiment of the present invention;

[0059] Figure 10 This is a schematic diagram of the connection between the magnetic yoke and the conductive support in one embodiment of the present invention;

[0060] Figure 11 This is a cross-sectional schematic diagram of the connection between the magnetic yoke and the conductive support in one embodiment of the present invention;

[0061] Figure 12 This is a schematic diagram of the conductive support structure in one embodiment of the present invention;

[0062] Figure 13 This is a cross-sectional schematic diagram of the conductive bracket in one embodiment of the present invention;

[0063] Figure 14 This is an exploded view of the diaphragm assembly in one embodiment of the present invention;

[0064] Figure 15 This is a schematic diagram of the centering support plate in one embodiment of the present invention.

[0065] Explanation of icon numbers:

[0066] 100. Sound-generating device; 1. Housing; 2. Magnetic circuit system; 21. Magnetic yoke; 211. Positioning platform; 212. Pressure groove; 213. Clearance notch; 22. Central magnetic part; 221. Central magnet; 222. Central washer; 223. Clearance area; 224. Clearance structure; 23. Side magnetic part; 231. Side magnet; 232. Side washer; 24. Magnetic gap; 25. Mounting hole; 3. Conductive support; 31. Main body; 311. First welding surface; 312. Second welding surface; 313. Groove; 314. Positioning groove; 315. First connecting part; 316. Second connecting part; 317. Clearance space; 32. Solder pad 321, First solder pad; 322, Second solder pad; 4, Vibration system; 41, Diaphragm assembly; 411, Vibrating part; 4111, First stepped surface; 4112, Second stepped surface; 4113, Convex bulge; 412, First folded ring; 4121, Inner fixing part; 4122, Fixing part; 413, Second folded ring; 4131, Outer fixing part; 4132, Hole; 42, Voice coil; 421, Long side; 422, Short side; 43, Centering support plate; 431, Main body; 4311, First solder pad; 432, Support leg; 4321, First support leg; 4322, Second support leg; 4323, Second solder pad.

[0067] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0068] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0069] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0070] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0071] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0072] This utility model proposes a sound-generating device 100. It is understood that the sound-generating device 100 is applied to electronic devices, such as smartwatches, mobile phones, speakers, computers, headphones, or televisions, etc., and is not limited thereto.

[0073] Please refer to the reference. Figures 1 to 15 As shown in this embodiment of the invention, the sound-generating device 100 includes a magnetic circuit system 2, a conductive support 3, and a vibration system 4. The magnetic circuit system 2 includes a magnetic yoke 21 and a central magnetic part 22 and a side magnetic part 23 disposed on the magnetic yoke 21. The side magnetic part 23 is located outside the central magnetic part 22 and forms a magnetic gap 24 with the central magnetic part 22. The magnetic circuit system 2 is provided with a mounting hole 25 that passes through the magnetic yoke 21 and the central magnetic part 22. The conductive support 3 is disposed in the mounting hole 25. The vibration system 4 includes a diaphragm assembly 41, a voice coil 42, and a... The centering support 43 and the diaphragm assembly 41 include a vibrating part 411, a first folded ring part 412 disposed outside the vibrating part 411, and a second folded ring part 413 disposed inside the vibrating part 411. The inner side of the second folded ring part 413 is connected to the conductive support 3. One end of the voice coil 42 is connected to the vibrating part 411, and the other end of the voice coil 42 is suspended in the magnetic gap 24. One end of the centering support 43 is electrically connected to the pad of the conductive support 3, and the other end of the centering support 43 is connected to the diaphragm assembly 41 and electrically connected to the lead wire of the voice coil 42.

[0074] In this embodiment, the sound-generating device 100 can be a single unit of a loudspeaker, and the loudspeaker can be a miniature loudspeaker. It should be noted that the magnetic circuit system 2 and the vibration system 4 of the sound-generating device 100 are arranged opposite to each other.

[0075] Optionally, the magnetic circuit system 2 is square in shape. For example, the magnetic circuit system 2 may include a central magnetic part 22 and a side magnetic part 23, both of which are square in structure. In this embodiment, the vibration system 4 is optionally square in shape. It is understood that the periphery of the diaphragm assembly 41 of the vibration system 4 may be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 4 may be respectively mounted on the module housing, etc., which are not limited here.

[0076] To better assemble the magnetic circuit system 2 and vibration system 4 of the sound-generating device 100, in one embodiment, as... Figures 1 to 4 , Figure 6 As shown, the sound-generating device 100 also includes a housing 1, a magnetic circuit system 2 connected to one end of the housing 1, and a vibration system 4 connected to the other end of the housing 1 and disposed opposite to the magnetic circuit system 2. That is, the periphery of the diaphragm assembly 41 of the vibration system 4 is connected to the other end of the housing 1 and disposed opposite to the magnetic circuit system 2.

[0077] In this embodiment, the outer shell 1 is used to install, fix, and support components such as the magnetic circuit system 2 and the vibration system 4; that is, the outer shell 1 provides a mounting base for components such as the magnetic circuit system 2 and the vibration system 4. It is understood that the outer shell 1 can be a single integral structure or formed by the cooperation of multiple separate structures; no limitation is made here. In this embodiment, the outer shell 1 can be a square frame or a frame structure, that is, the outer shell 1 has a cavity with openings at both ends. The magnetic circuit system 2 and the vibration system 4 are respectively connected to the two sides of the outer shell 1 and are arranged opposite to each other, so that the magnetic circuit system 2, the outer shell 1, and the diaphragm assembly 41 of the vibration system 4 enclose and form a vibration cavity.

[0078] Understandably, the sound-generating device 100 is used in electronic devices, meaning that the sound-generating device 100 can be installed in the electronic device through the housing 1. It should be noted that the housing 1 of the sound-generating device 100 can be a separate housing or enclosure structure from the electronic device. In this case, the housing 1 integrates the magnetic circuit system 2 and vibration system 4 of the sound-generating device 100 into a single structure, facilitating assembly and disassembly. Alternatively, the housing 1 of the sound-generating device 100 can be integrally molded with the housing or enclosure structure of the electronic device, which effectively improves structural strength and sealing performance.

[0079] In this embodiment, the outer shell 1 is used to house the fixed vibration system 4 and the magnetic circuit system 2, etc., so that the sound generating device 100 can be used as an independent component in an electronic device or a sound generating module, which is not limited here. Of course, in other embodiments, the sound generating device 100 can also be a module structure, in which case the vibration system 4 and the magnetic circuit system 2 of the sound generating unit are installed as multiple independent components on the outer shell 1 of the module structure, which is not limited here.

[0080] Understandably, by setting the magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic part 22 and a side magnetic part 23 disposed on the magnetic yoke 21, the magnetic circuit system 2 can be connected to the outer shell 1 through the periphery of the magnetic yoke 21; or, the magnetic circuit system 2 can be connected to the outer shell 1 through the side magnetic part 23, which is not limited here. In this embodiment, the side magnetic part 23 is disposed outside the central magnetic part 22 and forms a magnetic gap 24 with the central magnetic part 22, so that the diaphragm assembly 41 of the vibration system 4 is connected to the end of the outer shell 1 away from the magnetic yoke 21 and is opposite to and spaced from the magnetic circuit system 2, thereby connecting one end of the voice coil 42 to the diaphragm assembly 41, and the other end of the voice coil 42 is suspended in the magnetic gap 24. Thus, current is passed through the voice coil 42, so that the voice coil 42 converts electrical energy into mechanical energy in the magnetic gap 24 formed by the magnetic circuit system 2, thereby driving the voice coil 42 to drive the diaphragm assembly 41 to vibrate, thereby realizing sound production.

[0081] To achieve electrical connection between the voice coil 42 and the external circuit, the sound-generating device 100 in related technologies typically employs a centering support 43 structure, with both ends of the centering support 43 electrically connected to the voice coil 42 leads and the external circuit, respectively. In related technologies, the centering support 43 is usually positioned at the four corners of the sound-generating device 100 or along its short axis. That is, clearance space is provided at the four corners or short axis of the magnetic circuit system 2 to provide installation space or position for the centering support 43. However, this means the centering support 43 occupies part of the space in the magnetic circuit system 2, limiting the size of the side magnets and resulting in a lower magnetic field strength, reducing the BL value, and thus affecting the acoustic performance of the sound-generating device 100.

[0082] In this embodiment, by providing a mounting hole 25 through the magnetic yoke 21 and the central magnetic part 22 in the magnetic circuit system 2, and setting a conductive bracket 3 in the mounting hole 25, one end of the centering support plate 43 is electrically connected to the pad of the conductive support plate 3, and the other end of the centering support plate 43 is connected to the diaphragm assembly 41 and electrically connected to the lead wire of the voice coil 42. In this way, external current is introduced into the voice coil 42 through the conductive support plate 3 and the centering support plate 43. At the same time, the centering support plate 43 plays a centering role on the vibration of the voice coil 42, preventing the voice coil 42 from swinging or polarizing during vibration, thereby improving the sound production effect and acoustic performance of the sound generating device 100.

[0083] It should be noted that the magnetic field utilization rate at the central position of the central magnetic part 22 of the magnetic circuit system 2 is low. By setting the mounting hole 25 on the magnetic circuit system 2, for example, setting the mounting hole 25 at the central position of the central magnetic part 22 where the magnetic field utilization rate is low, the weight can be reduced and the conductive bracket 3 can be installed and fixed with minimal impact on the magnetic field strength of the magnetic circuit system 2. Moreover, since the centering support plate 43 is set in the center of the diaphragm assembly 41 and connected to the conductive bracket 3 set in the mounting hole 25 in the middle of the central magnetic part 22, the centering support plate 43 does not occupy the setting space of the side magnetic part 23, thereby increasing the volume of the side magnetic part 23, improving the magnetic field strength of the magnetic circuit system 2, and thus improving the BL value and the acoustic performance of the sound generating device 100. Furthermore, since there is magnetic leakage at the center of the central magnetic part 22, the mounting hole 25 needs to be formed by removing at least a portion of the central magnet 221 at the center of the central magnetic part 22. This reduces the amount of magnetic leakage of the central magnet 221. When the sound-emitting device 100 is assembled with an electronic device, the impact of magnetic leakage of the central magnet 221 in the sound-emitting device 100 on the performance of the electronic device can be reduced, thus meeting the requirements of the electronic device for the amount of magnetic leakage.

[0084] Optionally, the mounting hole 25 can be a circular hole, an elliptical hole, a square hole, a triangular hole, or other polygonal or irregularly shaped hole, and the specific selection and setting are based on actual needs, without limitation. In this embodiment, a through hole structure is formed in the center of the central magnetic part 22, and a third through hole is also formed in the center of the magnetic yoke 21 corresponding to the through hole structure of the central magnetic part 22. At this time, the through hole structure of the central magnetic part 22 and the third through hole of the magnetic yoke 21 are connected to form the mounting hole 25.

[0085] In this embodiment, the first folded ring portion 412 and the second folded ring portion 413 have opposite recess directions. Optionally, the second folded ring portion 413 protrudes towards the side away from the magnetic circuit system 2, and the first folded ring portion 412 protrudes towards the side closer to the magnetic circuit system 2.

[0086] Understandably, by configuring the diaphragm assembly 41 as a vibrating part 411, a first folded ring part 412 located outside the vibrating part 411, and a second folded ring part 413 located inside the vibrating part 411, and by connecting the inner side of the second folded ring part 413 to the conductive support 3, and by having the first folded ring part 412 and the second folded ring part 413 have opposite concave directions, the second folded ring part 413 protrudes towards the side away from the magnetic circuit system 2. This allows the second folded ring part 413 of the diaphragm assembly 41 to provide clearance space for the centering support piece 43. This reduces the clearance required by the central magnetic part 22 for the centering support piece 43, thereby increasing the volume of the central magnetic part 22, further enhancing the magnetic field strength of the magnetic circuit system 2, and consequently increasing the BL value and improving the acoustic performance of the sound-generating device 100. Optionally, the first folded ring part 412 and the second folded ring part 413 have opposite concave directions.

[0087] The sound-generating device 100 of this embodiment hollows out the magnetic circuit system 2 and installs a conductive bracket 3, so that the centering support plate 43 is electrically connected to the voice coil 42 and the conductive bracket 3 respectively. This increases the volume of the side magnetic part 23, improves the magnetic field strength, increases the product BL value, and thus improves the acoustic performance. Moreover, the sound-generating device 100 has low magnetic leakage, which meets the usage requirements.

[0088] The sound-generating device 100 of this invention configures the magnetic circuit system 2 as a magnetic yoke 21, with a central magnetic part 22 and a side magnetic part 23 disposed on the magnetic yoke 21. The side magnetic part 23 is located outside the central magnetic part 22 and forms a magnetic gap 24 with the central magnetic part 22. The vibration system 4 is configured as a diaphragm assembly 41, a voice coil 42, and a centering support 43 opposite to the magnetic circuit system 2. One end of the voice coil 42 is connected to the diaphragm assembly 41, and the other end of the voice coil 42 is suspended in the magnetic gap 24. When current is passed through the voice coil 42, the voice coil 42 converts electrical energy into mechanical energy within the magnetic gap 24 formed by the magnetic circuit system 2. The voice coil 42 drives the diaphragm assembly 41 to vibrate, thereby producing sound. Simultaneously, the magnetic circuit system 2 has a mounting hole 25 that passes through the magnetic yoke 21 and the central magnet 22, and a conductive bracket 3 is installed within the mounting hole 25. This allows one end of the centering support plate 43 to be electrically connected to the pad of the conductive bracket 3, and the other end of the centering support plate 43 to be connected to the diaphragm assembly 41 and the lead wire of the voice coil 42. Thus, the conductive bracket 3 not only allows for the installation and fixation of the centering support plate 43, but also enables the voice coil 42 to be connected and conductive to an external circuit through the centering support plate 43 and the conductive bracket 3. Furthermore, the centering support plate 43 effectively prevents the voice coil 42 from vibrating. 2. By causing oscillation or polarization, the acoustic performance of the sound-generating device 100 is improved. Furthermore, by providing a mounting hole 25 at the central position of the central magnetic section 22 in the magnetic circuit system 2 where the magnetic field utilization rate is low, both weight reduction and installation and fixation of the conductive support 3 can be achieved. Moreover, since the centering support 43 is located in the center of the diaphragm assembly 41 and connected to the conductive support 3 located in the mounting hole 25 in the middle of the central magnetic section 22, the centering support 43 does not occupy the installation space of the side magnetic section 23, thereby increasing the volume of the side magnetic section 23. Furthermore, by setting the diaphragm assembly 41 as the vibrating section 411 and providing a first fold outside the vibrating section 411... The first folded ring portion 412 and the second folded ring portion 413 are located inside the vibrating portion 411. The concave directions of the first folded ring portion 412 and the second folded ring portion 413 are opposite, so that the second folded ring portion 413 protrudes towards the side away from the magnetic circuit system 2. In this way, the inner side of the second folded ring portion 413 is connected to the conductive support 3, and the second folded ring portion 413 of the diaphragm assembly 41 provides clearance space for the centering support plate 43. This reduces the clearance made by the central magnetic portion 22 for the centering support plate 43, thereby increasing the volume of the central magnetic portion 22, thereby increasing the magnetic field strength of the magnetic circuit system 2, and further increasing the BL value and improving the acoustic performance of the sound generating device 100. Furthermore, since there is magnetic leakage at the center of the central magnetic part 22, the mounting hole 25 needs to be formed by removing at least a portion of the central magnet 221 at the center of the central magnetic part 22. This reduces the amount of magnetic leakage of the central magnet 221. When the sound-emitting device 100 is assembled with an electronic device, the impact of magnetic leakage of the central magnet 221 in the sound-emitting device 100 on the performance of the electronic device can be reduced, thus meeting the requirements of the electronic device for the amount of magnetic leakage.

[0089] In one embodiment, the side magnetic portion 23 may optionally be arranged in a closed ring shape. In this case, the annular side magnetic portion 23 is located outside the central magnetic portion 22 and forms a magnetic gap 24 with the central magnetic portion 22 at intervals. It can be understood that since the centering support plate 43 is located in the center of the diaphragm assembly 41 and is connected to the conductive bracket 3 located in the mounting hole 25 in the middle of the central magnetic portion 22, the centering support plate 43 does not occupy the installation space of the side magnetic portion 23. Therefore, the side magnetic portion 23 can be enlarged to increase the installation volume, thereby increasing the magnetic field strength of the magnetic circuit system 2, and thus increasing the BL value and improving the acoustic performance of the sound generating device 100.

[0090] Of course, in other embodiments, the side magnetic parts 23 include multiple side magnetic parts 23, which are arranged around the outside of the central magnetic part 22 and are spaced apart from the central magnetic part 22 to form a magnetic gap 24. Adjacent side magnetic parts 23 are connected end to end to form a closed ring structure, which is not limited here.

[0091] In one implementation, such as Figures 3 to 7 As shown, the side magnetic part 23 includes a side magnet 231 and a side washer 232 stacked together, with the side magnet 231 sandwiched between the magnetic yoke 21 and the side washer 232. In this embodiment, the side magnet 231 may be a permanent magnet, and the side washer 232 may be a magnetic plate structure; no limitation is made here.

[0092] Optionally, both the side magnets 231 and the side washer 232 form closed ring structures. In this case, the side magnetic portion 23 forms a closed ring structure and is arranged around the outside of the central magnetic portion 22. Of course, in other embodiments, there are multiple side magnets 231 and side washer 232, and they are arranged in a one-to-one correspondence. Adjacent side magnets 231 are connected end to end to form a closed ring structure, and adjacent side washer 232 are connected end to end to form a closed ring structure. In this case, there are multiple side magnetic portions 23, and the multiple side magnetic portions 23 are connected end to end to form a closed ring structure, which is not limited here.

[0093] It should be noted that the centering support plate 43 in this utility model is located in the center of the diaphragm assembly 41 and is connected to the conductive bracket 3 located in the mounting hole 25 in the middle of the central magnetic part 22. Compared with the traditional scheme where the centering support plate 43 is located at the four corners of the magnetic circuit system 2, the centering support plate 43 in this utility model does not occupy the setting space of the side magnetic part 23. There is no need to set up a space for the centering support plate 43 between two adjacent side magnets 231. Thus, the side magnets 231 can be set into a closed ring structure, which can increase the setting volume of the side magnets 231, improve the magnetic field strength of the magnetic circuit system 2, and thus improve the BL value.

[0094] In one embodiment, the first folded ring portion 412, the vibrating portion 411, and the second folded ring portion 413 of the diaphragm assembly 41 may be an integrally molded structure, thereby ensuring the vibration performance and structural strength of the diaphragm assembly 41. For example, the first folded ring portion 412, the vibrating portion 411, and the second folded ring portion 413 of the diaphragm assembly 41 can be integrally molded structural components made of the same material, and the configuration can be selected according to actual usage requirements. In this embodiment, the first folded ring portion 412 and the second folded ring portion 413 have an upwardly convex bulge structure or a downwardly concave concave structure, which is not limited here.

[0095] In one embodiment, the vibrating part 411 is formed as a vibrating plate. Optionally, the vibrating plate is made of metal or fiber material. In this embodiment, the vibrating plate is bonded to the first folded ring part 412 and the second folded ring part 413 respectively, or integrally injection molded.

[0096] In one implementation, such as Figure 1 , Figures 3 to 8 As shown, the outer periphery of the vibrating part 411 forms a first stepped surface 4111, and the inner periphery of the vibrating part 411 forms a second stepped surface 4112; the inner side of the first folded ring part 412 extends along the vibration direction perpendicular to the vibration system 4 to form an inner fixing part 4121, and the outer side of the second folded ring part 413 extends along the vibration direction perpendicular to the vibration system 4 to form an outer fixing part 4131; wherein, the inner fixing part 4121 overlaps with the first stepped surface 4111 and is bonded to the first stepped surface 4111, and the outer fixing part 4131 overlaps with the second stepped surface 4112 and is bonded to the second stepped surface 4112.

[0097] Understandably, the vibrating part 411 is bonded to the first folded ring part 412 and the second folded ring part 413 respectively. By forming a first stepped surface 4111 on the outer periphery of the vibrating part 411, the first stepped surface 4111 is recessed towards the direction close to the magnetic circuit system 2, thereby ensuring that the inner fixing part 4121 of the first folded ring part 412 overlaps the first stepped surface 4111 and is bonded to the first stepped surface 4111. When the inner fixing part 4121 is bonded to the first stepped surface 4111, the side of the inner fixing part 4121 facing away from the first stepped surface 4111 is flush with the vibrating part 411, thereby making the assembly structure more compact and ensuring the vibration performance of the entire diaphragm assembly 41. Meanwhile, by forming a second step surface 4112 on the inner periphery of the vibration part 411, the second step surface 4112 is recessed towards the direction close to the magnetic circuit system 2, thereby ensuring that when the outer fixing part 4131 of the second folded ring part 413 overlaps the second step surface 4112 and is bonded to the second step surface 4112, the side of the outer fixing part 4131 facing away from the second step surface 4112 is flush with the vibration part 411, thereby making the assembly structure more compact and saving vibration space.

[0098] In this embodiment, as Figure 1 , Figures 3 to 7 As shown, the vibrating part 411 has a convex portion 4113 protruding in a direction away from the magnetic circuit system 2. The lead wire of the voice coil 42 runs along the inner wall of the convex portion 4113 and is electrically connected to the centering support 43. Optionally, a portion of the end face of the voice coil 42 facing the diaphragm assembly 41 corresponds to and is spaced apart from the convex portion 4113. The convex portion 4113 of the vibrating part 411 provides routing and clearance space for the lead wire of the voice coil 42, thereby making the assembly structure more compact and ensuring the vibration performance of the entire diaphragm assembly 41.

[0099] Understandably, the vibrating part 411 is formed by stamping to form a convex part 4113, a first step surface 4111 and a second step surface 4112. The first step surface 4111 is located on the outer periphery of the convex part 4113 and close to the magnetic circuit system 2. The second step surface 4112 is located on the inner periphery of the convex part 4113 and close to the magnetic circuit system 2.

[0100] Optionally, the voice coil 42 is rectangular and includes two long sides 421 and two short sides 422 connected end to end. The voice coil 42 has two leads, which are respectively located on the two long sides 421 or the two short sides 422. In this embodiment, the convex portion 4113 of the vibrating part 411 is arranged corresponding to the two leads located on the two long sides 421 or the two short sides 422 of the voice coil 42, which is not limited here.

[0101] In one embodiment, the diaphragm assembly 41 may be a ring structure. In this embodiment, as... Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 14 As shown, the inner side of the second folding ring 413 is provided with a hollow hole 4132, and part of the centering support piece 43 is exposed in the hollow hole 4132.

[0102] Understandably, by setting a perforated hole 4132 in the center of the diaphragm assembly 41, part of the centering support plate 43 is exposed in the perforated hole 4132, thereby using the perforated hole 4132 to dissipate heat from the centering support plate 43 and the conductive bracket 3, so as to improve the service life of the diaphragm assembly 41, the centering support plate 43 and the conductive bracket 3.

[0103] In one implementation, such as Figures 1 to 4 , Figure 6 As shown, the outer side of the first folded ring portion 412 of the diaphragm assembly 41 extends along the vibration direction perpendicular to the vibration system 4 to form a fixing portion, which is connected and fixed to the outer shell 1.

[0104] Understandably, in order to further increase the connection area between the diaphragm assembly 41 and the housing 1 and improve stability, the end of the fixing part away from the first folded ring part 412 is bent and extended toward the housing 1 to form a bent part, which is connected to the outer wall of the housing 1. By bending downward on the outside of the fixing part to form a bent part, the bent part is connected to the outer wall of the housing 1, thereby increasing the connection area with the housing 1 and improving the connection stability and sealing performance.

[0105] To further enhance the structural strength of the vibrating portion 411 of the diaphragm assembly 41, in one embodiment, the diaphragm assembly 41 further includes a reinforcing portion disposed on the vibrating portion 411. It is understood that by providing the reinforcing portion, the structural strength of the vibrating portion 411 can be effectively enhanced, thereby improving the connection stability of the voice coil 42 and preventing problems such as tearing of the diaphragm assembly 41 when the voice coil 42 drives the diaphragm assembly 41 to vibrate.

[0106] In one embodiment, the centering support 43 includes a main body 431 and a support leg 432. The main body 431 is connected to the conductive support 3 and electrically connected to the pads of the conductive support 3. One end of the support leg 432 is connected to the main body 431, and the other end of the support leg 432 is connected to the vibrating part 411 and electrically connected to the lead wire of the voice coil 42.

[0107] In this embodiment, as Figure 1 , Figure 3 , Figure 4 , Figure 6 , Figure 8 , Figures 10 to 15 As shown, the main body 431 of the centering support 43 is fixed to the end of the conductive support 3 away from the magnetic yoke 21, and at least a portion of the main body 431 is exposed in the perforated hole 4132. Optionally, the main body 431 of the centering support 43 is located between the conductive support 3 and the inner side of the second folded ring portion 413 of the diaphragm assembly 41.

[0108] Understandably, the support leg 432 is opposite to the second folded ring 413 of the diaphragm assembly 41. Optionally, along the vibration direction of the vibration system 4, the second folded ring 413 protrudes and extends away from the support leg 432, and is disposed opposite to the support leg 432. This provides vibration and clearance space for the support leg 432 of the centering support plate 43, thereby reducing the clearance made by the central magnet 22 for the centering support plate 43, increasing the volume of the central magnet 22, increasing the magnetic field strength of the magnetic circuit system 2, and thus increasing the BL value and improving the acoustic performance of the sound generating device 100.

[0109] Optionally, the main body 431 and the support leg 432 are integrally formed. This effectively simplifies the processing steps of the centering support 43 and improves the structural strength of the centering support 43. In this embodiment, the main body 431 and the support leg 432 are optionally located on the same plane, which ensures the structural strength of the centering support 43.

[0110] In one implementation, such as Figure 3 , Figure 8 and Figure 15 As shown, the main body 431 is provided with a first pad 4311, and the leg part 432 is provided with a second pad 4323 at the end away from the main body 431. The first pad 4311 is electrically connected to the pad of the conductive bracket 3, and the second pad 4323 is electrically connected to the lead wire of the voice coil 42.

[0111] Understandably, this arrangement ensures that the voice coil 42 is connected and conductive to the conductive support 3 via the centering bracket 43. Optionally, the first pad 4311 of the main body 431 is exposed in the cutout hole 4132 to achieve heat dissipation. In this embodiment, the second pad 4323 is correspondingly connected to the second stepped surface 4112 of the vibrating part 411.

[0112] In one implementation, such as Figure 3 , Figure 8 and Figure 15 As shown, the support leg 432 includes two parts. In this embodiment, the voice coil 42 has two leads, namely an input lead and an output lead. By providing two support legs 432 for the centering support plate 43, the two leads can be connected to the two support legs 432 respectively, thereby enabling current to be passed into the voice coil 42. Optionally, the two support legs 432 of the centering support plate 43 are symmetrically arranged.

[0113] In one implementation, such as Figure 3 and Figure 8 As shown, the voice coil 42 may optionally be rectangular, and includes two long sides 421 and two short sides 422 connected end-to-end. In this embodiment, the voice coil 42 has two leads. Optionally, the two leads are respectively located on the two long sides 421 or the short sides 422. The centering support 43 has two legs 432, which are symmetrically arranged, and each leg 432 corresponds to and is electrically connected to a lead.

[0114] In one embodiment, the support leg 432 includes a first support leg 4321 and a second support leg 4322 connected to each other. The first support leg 4321 extends along the short axis of the main body 431 and is connected to the main body 431. The second support leg 4322 extends along the long axis of the main body 431 and is connected to the vibration part 411.

[0115] In this embodiment, as Figure 3 , Figure 8 and Figure 15As shown, by configuring the support leg 432 as a first support leg 4321 extending along the minor axis of the main body 431 and a second support leg 4322 extending along the major axis of the main body 431, not only does the support leg 432 of the centering support plate 43 have good deformation capability, but it also extends the support leg 432 to be connected and conductive with the lead wire of the voice coil 42. Optionally, a second pad 4323 is provided at the end of the second support leg 4322 away from the first support leg 4321.

[0116] Understandably, along the vibration direction of the vibration system 4, the second folded ring portion 413 is opposite to the first support leg 4321 and the second support leg 4322, respectively. Therefore, the second folded ring portion 413 of the diaphragm assembly 41 can avoid the first support leg 4321 and the second support leg 4322 of the centering support plate 43, thereby reducing the avoidance required by the central magnetic part 22 for the first support leg 4321 and the second support leg 4322, increasing the magnetic field strength of the central magnetic part 22, and thus improving the BL value and the acoustic performance of the sound-generating device 100.

[0117] Optionally, the support leg 432 includes multiple first legs 4321 and multiple second legs 4322, which are alternately arranged. Understandably, this arrangement ensures that when the two leads are respectively located on the two long sides 421 or short sides 422 of the voice coil 42, they can be smoothly connected to the support leg 432, and also ensures that the support leg 432 of the centering support 43 has good deformation capability.

[0118] In one embodiment, the central magnet 22 is provided with a clearance structure 224 corresponding to the support leg 432, and the clearance structure 224 is connected to the mounting hole 25.

[0119] In this embodiment, as Figure 3 , Figure 9 As shown, by providing an avoidance structure 224 in the central magnetic part 22, the avoidance structure 224 corresponds to the centering support plate 43, thereby further ensuring the deformation and vibration space of the centering support plate 43 and preventing the centering support plate 43 from interfering with the central magnetic part 22 during vibration, thus affecting the sound generation performance of the sound generating device 100. Optionally, the avoidance structure 224 corresponds to the support leg 432 of the centering support plate 43.

[0120] Optionally, the clearance structure 224 is a groove 313 formed by the central magnetic part 22 recessing towards the guide magnetic yoke 21. Of course, in other embodiments, the clearance structure 224 is a through hole structure passing through the central magnetic part 22, which is not limited here. In this embodiment, the clearance structure 224 is connected to the mounting hole 25, thus ensuring the deformation and vibration space of the support leg 432 of the centering support 43.

[0121] In one embodiment, the central magnetic part 22 includes a central magnet 221 and a central washer 222 stacked together. The central magnet 221 is sandwiched between the central washer 222 and the magnetic yoke 21. The mounting hole 25 passes through the magnetic yoke 21, the central magnet 221 and the central washer 222 in sequence.

[0122] In this embodiment, as Figures 3 to 7 As shown, by setting the central magnetic part 22 as a stacked central magnet 221 and a central washer 222, the central magnet 221 is sandwiched between the central washer 222 and the magnetic yoke 21, and the mounting hole 25 passes through the magnetic yoke 21, the central magnet 221 and the central washer 222 in sequence. In this way, the weight of the central magnetic part 22 can be effectively reduced by using the mounting hole 25. Since the magnet in the middle position of the central magnetic part 22 contributes little to the magnetic field strength, the conductive bracket 3 can be installed and fixed with little impact on the magnetic field strength.

[0123] Understandably, the central washer 222 forms the first through hole, the central magnet 221 forms the second through hole, and the magnetic yoke 21 forms the third through hole. The first through hole, the second through hole, and the third through hole are connected in sequence to form the mounting hole 25.

[0124] Optionally, the central magnetic part 22 may be arranged in a ring structure, such that a through hole structure is formed in the center of the central magnetic part 22. Of course, in other embodiments, the central magnetic part 22 includes multiple strip structures, which are arranged to form a ring structure, such that the multiple strip structures are arranged to form a through hole structure, which is not limited here.

[0125] Understandably, the central magnet 221 may optionally be arranged in a ring, such that a second through hole is formed in the center of the central magnet 221. Of course, in other embodiments, there may be multiple central magnets 221, which are arranged in a ring to form a mounting hole 25, that is, multiple central magnets 221 are arranged in a ring to form a second through hole. The central washer 222 is arranged in a ring, such that a first through hole is formed in the center of the central washer 222. Of course, in other embodiments, there may be multiple central washers 222, which are arranged in a ring to form a mounting hole 25, that is, multiple central washers 222 are arranged in a ring to form a first through hole; this is not limited here.

[0126] In one embodiment, the central washer 222 is provided with a recessed groove in the direction away from the diaphragm assembly 41 to form a clearance structure 224 for avoiding the centering support plate 43. It can be understood that by providing a groove or a through hole through the central washer 222 of the central magnet 22 to form the clearance structure 224, the clearance structure 224 can provide deformation vibration space for the support leg portion 432 of the centering support plate 43, thereby ensuring the sound generation effect of the sound generating device 100.

[0127] In another embodiment, such as Figure 3 As shown, the central washer 222 has a first groove recessed in the direction away from the diaphragm assembly 41, and the central magnet 221 has a second groove recessed in the direction away from the diaphragm assembly 41. The first groove and the second groove are connected and together form a clearance structure 224 for avoiding the centering support plate 43.

[0128] In this embodiment, the first groove can be a groove recessed in the central washer 222 or a through-hole structure passing through the central washer 222. Optionally, at least a portion of the first groove is a through-hole structure passing through the central washer 222. The second groove can be a groove recessed in the central magnet 221 or a through-hole structure passing through the central magnet 221. Optionally, at least a portion of the first groove and the second groove communicate and together form a clearance structure 224, which can provide deformation vibration space for the support leg 432 of the centering support plate 43, thereby ensuring the sound generation effect of the sound generating device 100.

[0129] Optionally, the portion of the clearance structure 224 corresponding to the leg 432 of the centering support piece 43 is a groove recessed into the central washer 222, and the portion of the clearance structure 224 corresponding to the second pad 4323 of the leg 432 of the centering support piece 43 is a through-hole structure that sequentially passes through the central washer 222 and the central magnet 221, which is not limited here. In this embodiment, the clearance structure 224 is connected to the mounting hole 25.

[0130] In one embodiment, a portion of the center washer 222 is recessed in a direction away from the diaphragm assembly 41 to form a clearance region 223. One end of the clearance region 223 is connected to the clearance structure 224, and the other end of the clearance region 223 extends toward the periphery of the center washer 222. The clearance region 223 is configured to correspond to the lead wire of the voice coil 42.

[0131] In this embodiment, as Figure 3 and Figure 9 As shown, by providing a clearance area 223 on the central washer 222, the clearance area 223 is positioned corresponding to the lead wire and / or vibrating part 411 of the voice coil 42, thereby providing sufficient vibration space for the lead wire and / or vibrating part 411 of the voice coil 42 and the centering support 43. Optionally, the clearance area 223 is positioned corresponding to the second stepped surface 4112 of the lead wire and / or vibrating part 411 of the voice coil 42.

[0132] Understandably, one end of the clearance area 223 communicates with the clearance structure 224 and / or the mounting hole 25, and the other end of the clearance area 223 extends toward the periphery of the central washer 222. Optionally, the clearance area 223 is a groove structure formed by the central washer 222 recessed in a direction away from the diaphragm assembly 41, which is not limited here. Of course, in other embodiments, the clearance area 223 can be a through hole or notch structure penetrating the central washer 222, which is not limited here.

[0133] In one embodiment, the conductive support 3 has a first welding surface 311 and a second welding surface 312 that are arranged opposite to each other. The first welding surface 311 is arranged facing the centering support plate 43 and is connected to the centering support plate 43. The second welding surface 312 is used to connect to an external power source. Along the vibration direction of the vibration system 4, the first welding surface 311 is higher than the side surface of the central magnet 22 facing the diaphragm assembly 41.

[0134] In this embodiment, as Figure 3 , Figure 4 , Figure 6 , Figures 10 to 13 As shown, a first welding surface 311 is formed on the side of the conductive bracket 3 facing the centering support plate 43, and a second welding surface 312 is also provided on the side of the conductive bracket 3 facing away from the first welding surface 311. In this way, the first welding surface 311 can be used to connect and conduct with the centering support plate 43, and the second welding surface 312 can be used to connect to an external power source. Thus, the conductive bracket 3 connects and conducts the external circuit with the centering support plate 43 to supply power to the voice coil 42.

[0135] Understandably, the main body 431 of the centering support piece 43 is fixed to the first welding surface 311, and the first welding pad 4311 is connected and conductive to the first welding surface 311.

[0136] Optionally, along the vibration direction of the vibration system 4, the first welding surface 311 is higher than the surface of the central magnet 22 facing the diaphragm assembly 41. This arrangement creates a space for the centering support 43 to vibrate between the first welding surface 311 of the conductive bracket 3 and the central magnet 22. Simultaneously, this space, combined with the vibration space provided by the second folded ring portion 413 of the diaphragm assembly 43, facilitates the installation of the centering support 43 without affecting the diaphragm assembly 41, while ensuring that the centering support 43 has sufficient vibration space during vibration.

[0137] In one embodiment, the conductive support 3 has a groove 313 on the side opposite to the first welding surface 311, and the bottom wall of the groove 313 forms the second welding surface 312.

[0138] In this embodiment, as Figure 4 , Figure 6 , Figure 11 , Figure 13 As shown, by providing a groove 313 on the side of the conductive bracket 3 facing away from the first welding surface 311, the bottom wall of the groove 313 forms a second welding surface 312, thereby providing installation space for the conductive lines or flexible circuit boards used to connect the conductive bracket 3 and protecting the conductive lines or flexible circuit boards.

[0139] In one embodiment, the conductive support 3 includes a main body 31 and a pad 32. The pad 32 is embedded in the main body 31. The pad 32 includes a first pad portion 321 and a second pad portion 322 connected to each other. At least a portion of the first pad portion 321 is exposed on the first soldering surface 311, and at least a portion of the second pad portion 322 is exposed on the second soldering surface 312.

[0140] In this embodiment, as Figure 4 , Figure 6 , Figure 11 , Figure 13 As shown, the main body 31 of the conductive bracket 3 can be a plastic part, and the solder pad 32 can be a metal conductive part. Optionally, the solder pad 32 and the main body 31 of the conductive bracket 3 can be integrally molded by injection molding.

[0141] Understandably, by setting the pad 32 as a first pad portion 321 and a second pad portion 322 connected together, at least a portion of the first pad portion 321 is exposed on the first soldering surface 311, and at least a portion of the second pad portion 322 is exposed on the second soldering surface 312. This facilitates the connection and conduction between the first pad 4311 of the centering support 43 and the first pad portion 321 of the first soldering surface 311, and the connection and conduction between the conductive line or flexible circuit board of the external circuit and the second pad portion 322 of the second soldering surface 312. This allows the external current to be smoothly conducted to the voice coil 42 through the conductive support 3 and the centering support 43.

[0142] Understandably, the first soldering surface 311 is provided with two first solder pad contacts. In this embodiment, the first solder pad portion 321 of the solder pad 32 exposes two spaced-apart first solder pad contacts on the first soldering surface 311. Optionally, the two first solder pad contacts are arranged spaced apart along the long axis of the magnetic circuit system 2; or, the two first solder pad contacts are arranged spaced apart along the short axis of the magnetic circuit system 2.

[0143] It should be noted that the two first pad contacts are arranged at intervals along the long axis of the magnetic circuit system 2. At this time, the two first pads 4311 of the main body 431 of the centering support 43 are arranged along the long axis of the magnetic circuit system 2 and are respectively connected to the two first pad contacts for conduction. Figure 3 , Figure 10 and Figure 12 As shown, the two first pad contacts are arranged at intervals along the short axis of the magnetic circuit system 2. At this time, the two first pads 4311 of the main body 431 of the centering support piece 43 are arranged along the long axis of the magnetic circuit system 2 and are respectively connected to the two first pad contacts.

[0144] Understandably, the second welding surface 312 is provided with two second pad contacts. In this embodiment, the second pad portion 322 of the pad piece 32 exposes two spaced-apart second pad contacts on the second welding surface 312. Optionally, the two second pad contacts are spaced apart along the long axis of the magnetic circuit system 2; or, the two second pad contacts are spaced apart along the short axis of the magnetic circuit system 2.

[0145] In one embodiment, the conductive bracket 3 and the magnetic yoke 21 are integrally injection molded. It is understood that the main body 31 of the conductive bracket 3 is a plastic part, the pad 32 can be a metal conductive part, and the magnetic yoke 21 is a metal magnetic plate. The main body 31, pad 32, and magnetic yoke 21 of the conductive bracket 3 can optionally be integrally injection molded, which can improve the installation stability of the conductive bracket 3 and the magnetic yoke 21, while simplifying the processing and assembly steps.

[0146] In one embodiment, the magnetic yoke 21 is provided with a positioning platform 211 near the mounting hole 25, and the conductive bracket 3 is provided with a positioning groove 314 corresponding to the positioning platform 211, with the positioning platform 211 embedded in the positioning groove 314.

[0147] In this embodiment, as Figure 4 , Figures 11 to 13 As shown, by setting a positioning platform 211 on the magnetic yoke 21, the conductive bracket 3 can be further installed, fixed, and positioned using the positioning platform 211. It can be understood that during the injection molding of the conductive bracket 3 and the magnetic yoke 21, the positioning platform 211 is embedded within the main body 31 of the conductive bracket 3 to form a positioning groove 314 on the conductive bracket 3. That is, the positioning groove 314 corresponds to the positioning platform 211, and the positioning platform 211 is embedded within the positioning groove 314.

[0148] Understandably, the positioning stage 211 is positioned adjacent to the mounting hole 25. Optionally, the positioning stage 211 may be a protrusion extending toward the side facing the diaphragm assembly 41; or, the positioning stage 211 may be a protrusion extending toward the side away from the diaphragm assembly 41, without limitation.

[0149] In one embodiment, the positioning platform 211 is formed by bending the side of the magnetic yoke 21 adjacent to the mounting hole 25, that is, the positioning platform 211 is formed by bending the side of the magnetic yoke 21 adjacent to the third through hole. Optionally, the positioning platform 211 and the magnetic yoke 21 are integrally formed, which simplifies the processing steps of the magnetic yoke 21 and improves the structural strength of the positioning platform 211. Of course, in other embodiments, the positioning platform 211 and the magnetic yoke 21 can also be separately arranged, with the positioning platform 211 connected to the magnetic yoke 21 by welding or bonding, which is not limited here.

[0150] In this embodiment, the magnetic yoke 21 is bent into a positioning platform 211 by stamping. Optionally, the positioning platform 211 is formed by bending the side of the magnetic yoke 21 adjacent to the mounting hole 25 toward the side near the diaphragm assembly 41, which is not limited here. This ensures that the side of the magnetic yoke 21 facing away from the diaphragm assembly 41 is planar, which facilitates the assembly of the sound-generating device 100 into the electronic device. At the same time, the positioning platform 211 can be used to position and limit the central magnet 22 and the conductive support 3.

[0151] Optionally, the positioning platform 211 is an annular boss surrounding the mounting hole 25. This arrangement effectively increases the contact area between the positioning platform 211 and the conductive support 3, thereby improving installation stability. Of course, in other embodiments, multiple positioning platforms 211 are included, spaced apart along the periphery of the mounting hole 25. It is understood that the spacing between adjacent positioning platforms 211 reduces costs while still achieving the installation, fixation, and positioning function of the conductive support 3.

[0152] In one embodiment, the conductive support 3 includes a main body 31 and a pad 32. The main body 31 is made of plastic material, and the pad 32 is injection molded into the main body 31. The main body 31 includes a first connecting portion 315 and a second connecting portion 316 disposed on the side of the first connecting portion 315 near the diaphragm assembly 41. The first connecting portion 315 is connected to the magnetic yoke 21, and the second connecting portion 316 is connected to the centering support 43. The second connecting portion 316 extends recessed relative to the first connecting portion 315 in a direction away from the central magnetic part 22 to form a clearance space 317 for avoiding the centering support 43.

[0153] In this embodiment, as Figure 3 , Figure 4 , Figure 6 , Figures 10 to 13 As shown, by configuring the conductive support 3 as a first connecting portion 315 and a second connecting portion 316 connected together, the first connecting portion 315 is connected to the magnetic yoke 21, and the second connecting portion 316 is connected to the centering support 43. It can be understood that by extending the second connecting portion 316 in a recessed direction relative to the first connecting portion 315 away from the central magnetic portion 22 to form a clearance space 317 for the centering support 43, the clearance space 317 provides vibration and clearance space for the centering support 43.

[0154] Understandably, by forming a clearance space 317 on the conductive support 3, the clearance made by the central magnetic part 22 to the centering support plate 43 can be further reduced, thereby increasing the volume of the central magnetic part 22, thereby increasing the magnetic field strength, which can improve the BL value and improve the acoustic performance of the sound generating device 100.

[0155] In this embodiment, the main body 31 of the conductive support 3 forms a first connecting portion 315 and a second connecting portion 316 that are connected to each other. Optionally, a stepped structure is formed at the connection between the first connecting portion 315 and the second connecting portion 316, such that the stepped structure forms a clearance space 317. It is understood that the solder pads 32 of the conductive support 3 are injection molded into the main body 31. Optionally, a second welding surface 312 is formed on the side of the first connecting portion 315 facing away from the second connecting portion 316, and a first welding surface 311 is formed on the side of the second connecting portion 316 facing away from the first connecting portion 315; this is not limited here.

[0156] In one embodiment, the magnetic yoke 21 is further provided with a groove 212 on the side facing away from the diaphragm assembly 41. One end of the groove 212 is connected to the mounting hole 25, and the other end of the groove 212 extends toward the periphery of the magnetic yoke 21. The groove 212 is used to avoid the routing of wires.

[0157] In this embodiment, as Figure 2 As shown, by setting a groove 212 on the magnetic yoke 21, one end of the groove 212 is connected to the mounting hole 25, and the other end of the groove 212 extends toward the periphery of the magnetic yoke 21, so that the groove 212 can be conveniently used to avoid the routing of wires.

[0158] Understandably, the conductive support 3 of the sound-generating device 100 is connected to the external circuit via conductive lines or flexible circuit boards. In this case, the groove 212 on the side of the magnetic yoke 21 facing away from the diaphragm assembly 41 provides space for the conductive lines or flexible circuit boards, and positions and limits the installation of the wiring structure. This makes the overall structure more compact and saves space. Optionally, the groove 212 is formed by a recess on the side of the magnetic yoke 21 facing away from the diaphragm assembly 41.

[0159] Optionally, the pressure groove 212 includes multiple grooves; the multiple pressure grooves 212 are arranged at intervals. In this embodiment, one end of the multiple pressure grooves 212 is connected to the mounting hole 25, and the other end of the multiple pressure grooves 212 extends toward the periphery of the guide yoke 21 and is arranged at intervals.

[0160] To improve the balance performance of the sound-generating device 100, the plurality of pressure grooves 212 are symmetrically arranged around the mounting hole 25. Of course, in other embodiments, the plurality of pressure grooves 212 may optionally be arranged radially around the mounting hole 25, which is not limited here.

[0161] In one embodiment, the periphery of the magnetic yoke 21 is also provided with a clearance notch 213, and the end of the pressure groove 212 away from the mounting hole 25 is connected to the clearance notch 213.

[0162] In this embodiment, as Figure 2 , Figure 3 and Figure 10As shown, by setting a clearance notch 213 around the periphery of the magnetic yoke 21, the end of the pressure groove 212 away from the mounting hole 25 is connected to the clearance notch 213. In this way, the clearance notch 213 can be used to further limit the assembly of conductive lines or flexible circuit boards and other structures, and realize directional wiring installation.

[0163] In one embodiment, such as Figure 2 As shown, a positioning post is provided on the periphery of the side of the outer shell 1 facing away from the diaphragm assembly 41, and a positioning notch is provided on the magnetic yoke 21 corresponding to the positioning post. The positioning post and the positioning notch are positioned and engaged. It can be understood that by setting a positioning post on the outer shell 1 and forming a positioning notch on the magnetic yoke 21 to engage with the positioning post, the positioning and installation of the magnetic circuit system 2 can be achieved, thereby improving the convenience and accuracy of installation.

[0164] In this embodiment, as Figure 3 , Figure 4 , Figure 6 As shown, the side magnet part 23 includes a side magnet 231 and a side washer 232 stacked together. The side magnet 231 is sandwiched between the side washer 232 and the magnetic yoke 21. The side washer 232 is connected to the outer shell 1. Optionally, the side washer 232 and the outer shell 1 are integrally formed, which simplifies the structure and improves installation stability.

[0165] This utility model also proposes a sound-generating module, which includes the sound-generating device 100 described above. The specific structure of the sound-generating device 100 is as described in the foregoing embodiments. Since this sound-generating module adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0166] In one embodiment, the sound-generating module further includes a flexible circuit board, one end of which is electrically connected to the conductive support 3 of the sound-generating device 100, and the other end of which is used to connect to an external power source.

[0167] Understandably, the flexible circuit board is used to connect and conduct external circuitry to the sound-generating device 100. The flexible circuit board has inner and outer pads. The inner pad of the flexible circuit board is connected and conducts to the second welding surface 312 of the conductive support 3 of the sound-generating device 100, and the outer pad of the flexible circuit board is used to connect to external terminals.

[0168] In this embodiment, the sound-generating module further includes a module housing with a cavity. The sound-generating device 100 is disposed within the cavity of the module housing, and at least one end of the flexible circuit board connected to the sound-generating device 100 is located within the cavity of the module housing. Of course, in other embodiments, the flexible circuit board may also be entirely disposed within the cavity of the module housing, which is not limited here.

[0169] This utility model also proposes an electronic device, which includes the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is as described in the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0170] In this embodiment, the electronic device also includes a device housing, and the sound-generating device 100 and the flexible circuit board are both disposed within the device housing. It is understood that the electronic device can be headphones, a mobile phone, a computer, a tablet computer, a smart wearable device, etc., and is not limited thereto.

[0171] This utility model also proposes an electronic device that includes the aforementioned sound-generating module. The specific structure of the sound-generating module is as described in the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be repeated here.

[0172] It is understood that the electronic device can be headphones, mobile phones, computers, tablets, smart wearable devices, etc., and is not limited thereto. In this embodiment, the electronic device also includes a device housing, and the sound-emitting module is disposed inside the device housing.

[0173] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A sound-generating device, characterized in that, The sound-generating device includes: A magnetic circuit system, the magnetic circuit system including a magnetic yoke and a central magnetic part and a side magnetic part disposed on the magnetic yoke, the side magnetic part being located outside the central magnetic part and forming a magnetic gap with the central magnetic part, the magnetic circuit system having a mounting hole penetrating the magnetic yoke and the central magnetic part; A conductive support, wherein the conductive support is disposed within the mounting hole; and A vibration system includes a diaphragm assembly, a voice coil, and a centering support. The diaphragm assembly includes a vibrating part, a first folded ring portion disposed outside the vibrating part, and a second folded ring portion disposed inside the vibrating part. The inner side of the second folded ring portion is connected to the conductive support. One end of the voice coil is connected to the vibrating part, and the other end of the voice coil is suspended in the magnetic gap. One end of the centering support is electrically connected to the pad of the conductive support, and the other end of the centering support is connected to the diaphragm assembly and electrically connected to the lead wire of the voice coil.

2. The sound-generating device as described in claim 1, characterized in that, The centering support includes a main body and a support leg. The main body is connected to the conductive bracket and electrically connected to the pads of the conductive bracket. One end of the support leg is connected to the main body, and the other end of the support leg is connected to the vibrating part and electrically connected to the lead wire of the voice coil.

3. The sound-generating device as described in claim 2, characterized in that, The outrigger includes two outriggers, which are arranged symmetrically. And / or, the support leg includes a first support leg and a second support leg connected to each other, the first support leg extends along the short axis of the main body and is connected to the main body, the second support leg extends along the long axis of the main body and is connected to the vibration part, and along the vibration direction of the vibration system, the second folding ring is opposite to the first support leg and the second support leg respectively; And / or, the main body and the support leg are integrally formed; And / or, the main body and the support leg are located on the same plane; And / or, the main body is provided with a first pad, and the leg is provided with a second pad at the end away from the main body. The first pad is electrically connected to the pad of the conductive bracket, and the second pad is electrically connected to the lead of the voice coil.

4. The sound-generating device as described in claim 2, characterized in that, Along the vibration direction of the vibration system, the second folded ring portion protrudes and extends away from the support leg portion, and is disposed opposite to the support leg portion.

5. The sound-generating device as described in claim 2, characterized in that, The central magnetic part is provided with a clearance structure corresponding to the support leg part, and the clearance structure is connected to the mounting hole; The clearance structure is a groove formed by the central magnetic part being recessed towards the magnetic yoke; or, the clearance structure is a through hole structure that passes through the central magnetic part.

6. The sound-generating device as claimed in claim 1, characterized in that, The central magnetic part includes a central magnet and a central washer stacked together. The central magnet is sandwiched between the central washer and the magnetic yoke. The mounting hole passes through the magnetic yoke, the central magnet and the central washer in sequence. The central washer has a recessed groove in the direction away from the diaphragm assembly to form a clearance structure for avoiding the centering support plate; or, the central washer has a first recessed groove in the direction away from the diaphragm assembly, and the central magnet has a second recessed groove in the direction away from the diaphragm assembly, the first groove and the second groove are connected and together form a clearance structure for avoiding the centering support plate.

7. The sound-generating device as described in claim 6, characterized in that, A portion of the central washer is recessed in a direction away from the diaphragm assembly to form a clearance area. One end of the clearance area is connected to the clearance structure, and the other end of the clearance area extends toward the periphery of the central washer. The clearance area is configured to correspond to the lead wire of the voice coil. And / or, the central magnet is arranged in a ring; or, the central magnet includes multiple central magnets, which are arranged in a ring to form the mounting hole; And / or, the central washer is arranged in a ring; or, the central washer includes multiple central washers, and the multiple central washers are arranged in a ring to form the mounting hole.

8. The sound-generating device as claimed in claim 1, characterized in that, The first folded ring portion, the vibration portion, and the second folded ring portion are integrally formed structures; Alternatively, the vibrating part may be formed as a vibrating plate, which may be bonded to the first folded ring and the second folded ring respectively or integrally injection molded, and the vibrating plate may be made of metal or fiber material.

9. The sound-generating device as claimed in claim 1, characterized in that, The outer periphery of the vibrating part forms a first stepped surface, and the inner periphery of the vibrating part forms a second stepped surface; The inner side of the first folded ring extends along the vibration direction perpendicular to the vibration system to form an inner fixing part, and the outer side of the second folded ring extends along the vibration direction perpendicular to the vibration system to form an outer fixing part; The internal fixing part overlaps with the first step surface and is bonded to the first step surface, while the external fixing part overlaps with the second step surface and is bonded to the second step surface.

10. The sound-generating device as claimed in claim 9, characterized in that, The side of the internal fixing part facing away from the first step surface is flush with the vibration part; And / or, the side of the external fixing part facing away from the second step surface is flush with the vibration part; And / or, the second folded ring protrudes toward the side away from the magnetic circuit system, and the first folded ring protrudes toward the side closer to the magnetic circuit system.

11. The sound-generating device as claimed in claim 1, characterized in that, The inner side of the second folded ring is provided with a hollow hole, and part of the centering support plate is exposed in the hollow hole.

12. The sound-generating device as claimed in claim 1, characterized in that, The conductive support has a first welding surface and a second welding surface that are opposite to each other. The first welding surface faces the centering support and is connected to the centering support. The second welding surface is used to connect to an external power source. Along the vibration direction of the vibration system, the first welding surface is higher than the side surface of the central magnet facing the diaphragm assembly.

13. The sound-generating device as claimed in claim 12, characterized in that, The conductive support has a groove on the side opposite to the first welding surface, and the bottom wall of the groove forms the second welding surface; And / or, the conductive support includes a main body and a pad, the pad being embedded in the main body, the pad including a first pad portion and a second pad portion connected to each other, at least a portion of the first pad portion being exposed on the first welding surface, and at least a portion of the second pad portion being exposed on the second welding surface.

14. The sound-generating device as claimed in claim 1, characterized in that, The conductive support and the magnetic yoke are integrally injection molded; And / or, the conductive support includes a main body and solder pads, the main body is a plastic material, the solder pads are injection molded into the main body, the main body includes a first connecting portion and a second connecting portion disposed on the side of the first connecting portion near the diaphragm assembly, the first connecting portion is connected to the magnetic yoke, and the second connecting portion is connected to the centering support; wherein, the second connecting portion extends recessed relative to the first connecting portion in a direction away from the central magnet to form a clearance space to avoid the centering support.

15. The sound-generating device as described in any one of claims 1 to 14, characterized in that, The edge magnetic part includes an edge magnet and an edge washer stacked together, with the edge magnet sandwiched between the magnetic yoke and the edge washer; Both the side magnets and the side washer form a closed ring structure; or, there are multiple side magnets and side washers, and they are arranged in a one-to-one correspondence, with adjacent side magnets connected end to end to form a closed ring structure.

16. The sound-generating device according to any one of claims 1 to 14, characterized in that, The magnetic yoke is also provided with a groove on the side facing away from the diaphragm assembly. One end of the groove is connected to the mounting hole, and the other end of the groove extends toward the periphery of the magnetic yoke. The groove is used to avoid wiring.

17. A sound-generating module, characterized in that, The sound-generating module includes: Module housing; The sound-generating device as described in any one of claims 1 to 16, wherein the sound-generating device is disposed within the module housing; and A flexible circuit board, one end of which is electrically connected to the conductive support of the sound-generating device, and the other end of which is used to connect to an external power source.

18. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 16; Alternatively, the electronic device may include the sound-generating module as described in claim 17.

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