Sound production device and sound production module

Abstract

The application discloses a sound production device and a sound production module, and relates to the technical field of electroacoustic transduction. The magnetic circuit system of the sound production device is provided with a mounting hole penetrating through a magnetic yoke and a central magnetic part, and a conductive support is arranged in the mounting hole. The vibration system comprises a diaphragm assembly, a voice coil and a centering support sheet. The centering support sheet comprises a first connecting part, an elastic arm and a second connecting part which are sequentially connected. The first connecting part is lower than the second connecting part. The projections of the first connecting part and the second connecting part along the vibration direction of the diaphragm assembly do not overlap. The elastic arm comprises a first oblique connecting section and a second oblique connecting section which are sequentially connected. The first oblique connecting section and the second oblique connecting section are smoothly connected. The included angle between the first oblique connecting section and the second oblique connecting section is an obtuse angle. In the application, the elastic arm of the centering support sheet is a Z-axis obtuse angle L-shaped structure, the horizontal space occupied by the elastic arm is greatly reduced, the volume of the central magnetic part can be ensured, and the acoustic performance of the sound production device is improved.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic transduction technology, and in particular to a sound-generating device and a sound-generating module 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. Summary of the Invention

[0005] The main objective of this invention is to provide a sound-generating device and a sound-generating module, which aims 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 solve the above-mentioned technical problems, the present invention provides the following technical solution: On one hand, embodiments of the present invention provide a sound-generating device, comprising: 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 comprising a diaphragm assembly, a voice coil, and a centering support. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is suspended within the magnetic gap. The centering support comprises a first connecting portion, an elastic arm, and a second connecting portion connected in sequence. The first connecting portion is connected to the conductive support and electrically connected to the pads of the conductive support. The second connecting portion is connected to the diaphragm assembly and electrically connected to the leads of the voice coil. Wherein, the first connecting part is lower than the second connecting part, the projections of the first connecting part and the second connecting part along the vibration direction of the diaphragm assembly do not overlap, the elastic arm includes a first oblique connecting segment and a second oblique connecting segment connected in sequence, the first oblique connecting segment and the second oblique connecting segment have a smooth transition, and the included angle between the first oblique connecting segment and the second oblique connecting segment is an obtuse angle.

[0007] In one embodiment, the included angle between the first oblique connecting segment and the second oblique connecting segment is 100 degrees to 150 degrees; And / or, the angled opening between the first oblique connecting segment and the second oblique connecting segment faces the diaphragm assembly.

[0008] In one embodiment, the elastic arm further includes a straight section disposed between the first connecting portion and the first oblique connecting segment, and a vertical section disposed between the second connecting portion and the second oblique connecting segment, wherein the straight section is located in the plane of the first connecting portion, and the vertical section is perpendicular to the straight section.

[0009] In one embodiment, the centering support includes two, which are centrally symmetrically distributed around the center of the magnetic circuit system, and the first connecting portion of the two centering supports is an integrally formed structure. And / or, the centering support includes two, the two centering supports are arranged along the long axis of the magnetic circuit system, and the first connecting portions of the two centering supports are arranged opposite each other along the long axis or the short axis of the magnetic circuit system; And / or, the elastic arm extends along the long axis of the magnetic circuit system, and the elastic arm extends in a plane parallel to the vibration direction of the diaphragm assembly, the width of the elastic arm is 0.2mm-0.4mm, and the length of the projection of the elastic arm along the vibration direction of the diaphragm assembly is 0.4mm-1mm; And / or, along the long axis of the magnetic circuit system, the length of the second connection portion is 0.4mm-0.8mm; And / or, the first connecting portion is provided with a first pad, the second connecting portion is provided with a second pad, 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.

[0010] In one embodiment, the central magnetic part includes a central magnet and a central washer stacked together, the central magnet being sandwiched between the magnetic yoke and the central washer, and the mounting hole sequentially penetrating the magnetic yoke, the central magnet, and the central washer; the central magnetic part has an avoidance structure corresponding to the centering support piece, the avoidance structure communicating with the mounting hole, and the avoidance structure including a through hole penetrating the central magnet and the central washer, wherein: Along the minor axis of the magnetic circuit system, the width of the through hole is 0.4mm-0.6mm, and along the major axis of the magnetic circuit system, the distance from the outer edge of the through hole to the center of the magnetic circuit system is 2mm-3mm. And / or, the clearance structure further includes an enlarged hole penetrating the central washer, the enlarged hole connecting the through hole to the side away from the mounting hole, along the short axis direction of the magnetic circuit system, the width of the enlarged hole being 0.6mm-1mm; And / or, the mounting hole is a rectangular hole, along the short axis of the magnetic circuit system, and the width of the mounting hole is 1mm-3mm; And / or, the avoidance structure further includes a first groove formed by a surface recess of the central washer away from the magnetic yoke and extending through the periphery of the central washer along the long axis of the magnetic circuit system; And / or, along the short axis of the magnetic circuit system, the central washer is provided with clearance grooves on both sides of the mounting hole that communicate with the mounting hole.

[0011] 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; 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 and adjacent side washers connected end to end to form a closed ring structure.

[0012] In one embodiment, the conductive support has a first welding surface and a second welding surface disposed 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 not higher than the surface of the central magnet facing the diaphragm assembly, wherein: The conductive support has a second groove on the side opposite to the first welding surface, and the bottom wall of the second groove forms the second welding surface; and / or, the conductive support includes a main body and a pad, the pad is embedded in the main body, the pad includes a first pad portion and a second pad portion connected to each other, at least a portion of the first pad portion is exposed on the first welding surface, and at least a portion of the second pad portion is exposed on the second welding surface; And / or, the conductive support and the magnetic yoke are integrally injection molded.

[0013] In one embodiment, the diaphragm assembly includes: A diaphragm is disposed opposite to the magnetic circuit system, and an inner ring hole is provided in the center of the diaphragm; A first dome is provided on the inner ring hole and connected to the diaphragm; a second connecting part is connected to the first dome; and an assembly hole is provided in the center of the first dome. The second dome is disposed on the assembly hole.

[0014] In one embodiment, the diaphragm assembly further includes a frame, one end of which is connected to the first dome along the vibration direction of the vibration system, and the other end of which is connected to the voice coil along the vibration direction.

[0015] On the other hand, embodiments of the present invention provide a sound-generating module, comprising: Module housing; The aforementioned sound-generating device is disposed within the module housing; 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.

[0016] The present invention has the following beneficial effects: The sound-generating device and module of this invention, by configuring the magnetic circuit system as a magnetic yoke and a central magnetic part and a side magnetic part disposed on the magnetic yoke, such that the side magnetic part is located outside the central magnetic part and forms a magnetic gap with the central magnetic part, and the vibration system is configured as a diaphragm assembly, a voice coil, and a centering support plate opposite to the magnetic circuit system, such that 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, so that 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, thereby driving the voice coil to vibrate the diaphragm assembly, thus realizing sound generation; at the same time, by providing a mounting hole through the magnetic yoke and the central magnetic part in the magnetic circuit system, and setting a conductive bracket in the mounting hole, one end of the centering support plate is connected to the conductive bracket and electrically connected to the solder pad of the conductive bracket, and the other end of the centering support plate... The end is connected to the diaphragm assembly and electrically connected to the lead wire of the voice coil. This allows the conductive support to both fix the centering bracket and enable the voice coil to connect and conduct to external circuits via the centering bracket and the conductive support. Simultaneously, the centering bracket effectively prevents the voice coil from wobbling or polarizing, improving the acoustic performance of the sound-generating device. Furthermore, by setting a mounting hole in the central position of the magnetic field section in the magnetic circuit system, where the magnetic field utilization is low, weight reduction and the installation and fixation of the conductive support are achieved. Moreover, since the centering bracket is located in the middle of the diaphragm assembly and connected to the conductive support in the mounting hole in the middle of the magnetic yoke, the centering bracket does not occupy the space of the side magnetic section, thus increasing the volume of the side magnetic section and 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, the centering support includes a first connecting part, an elastic arm, and a second connecting part connected in sequence. The first connecting part is lower than the second connecting part, and the projections of the first connecting part and the second connecting part along the vibration direction of the diaphragm assembly do not overlap. The elastic arm includes a first oblique connecting segment and a second oblique connecting segment connected in sequence, with a smooth transition between the first oblique connecting segment and the second oblique connecting segment. The included angle between the first oblique connecting segment and the second oblique connecting segment is an obtuse angle. Thus, compared to the existing technology where the elastic arm of the centering support is designed to be bent horizontally, occupying a large horizontal space and resulting in a reduction in the horizontal magnetic circuit size, in this embodiment, the elastic arm of the centering support is an obtuse-angled L-shaped structure extending in a vertical plane, which has a good elastic effect and significantly reduces the horizontal space occupied, thereby increasing the horizontal size of the central magnetic part, ensuring the volume of the central magnetic part, and improving the acoustic performance of the sound-generating device. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a top view of the sound-generating module according to an embodiment of the present invention; Figure 2This is a bottom view of the sound-generating module according to an embodiment of the present invention; Figure 3 This is an exploded view of the sound-generating module according to an embodiment of the present invention; Figure 4 This is a cross-sectional view along the long axis of the sound-generating module according to an embodiment of the present invention; Figure 5 This is a cross-sectional view of the sound-generating module in the short axis direction according to an embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the centering support plate in an embodiment of the present invention; Figure 7 This is a front view schematic diagram of the centering support plate in an embodiment of the present invention; Figure 8 This is a top view of the centering support plate in an embodiment of the present invention; Figure 9 This is a schematic diagram showing the relative positional relationship between the centering support and the magnetic circuit system in an embodiment of the present invention; Figure 10 This is a schematic diagram of the diaphragm assembly in an embodiment of the present invention.

[0018] Figure label: 100. Sound-generating module, 1. Magnetic circuit system; 11. Magnetic yoke; 111. Positioning platform; 112. First pressing groove; 113. Second pressing groove; 12. Central magnetic part; 121. Central magnet; 122. Central washer; 1221. Clearance groove; 123. Clearance structure; 1231. Through hole; 1232. First groove; 1233. Enlarged hole; 13. Side magnetic part; 131. Side magnet; 132. Side washer; 14. Magnetic gap; 15. Mounting hole. 2. Vibration system; 21. Diaphragm assembly; 211. Diaphragm; 2111. Surround section; 2112. Fixing section; 2113. Inner ring section; 2114. Inner ring hole; 212. First dome; 2121. First stepped surface; 2122. Second stepped surface; 2123. Assembly hole; 213. Second dome; 214. Frame; 2141. Main body; 2142. First bending section; 2143. Second bending section; 22. Voice coil; 221. Lead wire; 23. Centering support; 231. First connecting section; 2311. First solder pad; 232. Elastic arm; 2321. First oblique connecting section; 2322. Second oblique connecting section; 2323. Straight section; 2324. Vertical section; 233. Second connecting section; 2331. Second solder pad. 3. Conductive support; 31. Main body component; 311. First welding surface; 312. Second welding surface; 313. Second groove; 314. Positioning groove; 32. Solder pad; 321. First solder pad portion; 322. Second solder pad portion. 4. Flexible circuit board, 5. Outer shell. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] On the one hand, embodiments of the present invention provide a sound-generating device, such as... Figure 1-10 As shown, the sound-generating device includes a magnetic circuit system 1, a vibration system 2, and a conductive support 3. The magnetic circuit system 1 includes a magnetic yoke 11, a central magnetic portion 12, and a side magnetic portion 13 disposed on the yoke 11. The side magnetic portion 13 is located outside the central magnetic portion 12 and forms a magnetic gap 14 with the central magnetic portion 12. The magnetic circuit system 1 has a mounting hole 15 penetrating the magnetic yoke 11 and the central magnetic portion 12. The conductive support 3 is disposed within the mounting hole 15. The vibration system 2 includes a diaphragm assembly 21, a voice coil 22, and a centering support 23. One end of the voice coil 22 is connected to the diaphragm assembly 21, and the other end of the voice coil 22 is suspended within the magnetic gap 14. The centering support 23 includes a first connecting portion 231, an elastic arm 232, and a second connecting portion 233 connected in sequence. The first connecting portion 231 is connected to the conductive support 3. The bracket 3 is connected and electrically connected to the pads of the conductive bracket 3. The second connecting part 233 is connected to the diaphragm assembly 21 and electrically connected to the lead wire of the voice coil 22. The first connecting part 231 is lower than the second connecting part 233. The projections of the first connecting part 231 and the second connecting part 233 along the vibration direction of the diaphragm assembly 21 do not overlap. The elastic arm 232 includes a first oblique connecting segment 2321 and a second oblique connecting segment 2322 connected in sequence. The first oblique connecting segment 2321 and the second oblique connecting segment 2322 have a smooth transition. The included angle α between the first oblique connecting segment 2321 and the second oblique connecting segment 2322 is an obtuse angle, preferably 100 degrees to 150 degrees, such as 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees, etc.

[0021] In this embodiment, the sound-generating device 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 1 and the vibration system 2 of the sound-generating device are arranged opposite to each other.

[0022] Optionally, the magnetic circuit system 1 is square in shape. For example, the magnetic circuit system 1 may include a central magnetic part 12 and a side magnetic part 13, both of which are square in structure. In this embodiment, the vibration system 2 is optionally square in shape. It is understood that the periphery of the diaphragm assembly 21 of the vibration system 2 may be connected to the magnetic circuit system 1, or the magnetic circuit system 1 and the vibration system 2 may be respectively mounted on a fixed shell, etc., which are not limited here.

[0023] To better assemble the magnetic circuit system 1 and vibration system 2 of the sound-generating device, in one embodiment, such as Figure 3-5 As shown, the sound-generating device also includes a housing 5, a magnetic circuit system 1 connected to one end of the housing 5, and a vibration system 2 connected to the other end of the housing 5 and arranged opposite to the magnetic circuit system 1. That is, the periphery of the diaphragm assembly 21 of the vibration system 2 is connected to the other end of the housing 5 and arranged opposite to the magnetic circuit system 1.

[0024] In this embodiment, the outer shell 5 is used to install, fix, and support components such as the magnetic circuit system 1 and the vibration system 2; that is, the outer shell 5 provides a mounting base for components such as the magnetic circuit system 1 and the vibration system 2. It is understood that the outer shell 5 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 5 can be a square frame or a frame structure, that is, the outer shell 5 has a cavity with openings at both ends. The magnetic circuit system 1 and the vibration system 2 are respectively connected to the two ends of the outer shell 5 and are arranged opposite to each other, so that the magnetic circuit system 1, the outer shell 5, and the diaphragm assembly 21 of the vibration system 2 enclose and form a vibration cavity.

[0025] Understandably, by setting the magnetic circuit system 1 as a magnetic yoke 11 and a central magnetic part 12 and a side magnetic part 13 disposed on the magnetic yoke 11, the magnetic circuit system 1 can be connected to the outer shell 5 through the periphery of the magnetic yoke 11; or, the magnetic circuit system 1 can be connected to the outer shell 5 through the side magnetic part 13, which is not limited here. In this embodiment, the side magnetic part 13 is disposed outside the central magnetic part 12 and forms a magnetic gap 14 with the central magnetic part 12. This allows the diaphragm assembly 21 of the vibration system 2 to be connected to the end of the outer shell 5 away from the magnetic yoke 11 and to be opposite and spaced from the magnetic circuit system 1. This connects one end of the voice coil 22 to the diaphragm assembly 21, and the other end of the voice coil 22 is suspended in the magnetic gap 14. Thus, current is passed through the voice coil 22, causing the voice coil 22 to convert electrical energy into mechanical energy within the magnetic gap 14 formed by the magnetic circuit system 1, thereby driving the voice coil 22 to vibrate the diaphragm assembly 21 and thus producing sound.

[0026] To achieve electrical connection between the voice coil 22 and the external circuit, the sound-generating device in related technologies typically employs a centering bracket structure, with both ends of the centering bracket 23 electrically connected to the voice coil 22 lead and the external circuit, respectively. In related technologies, the centering bracket 23 is usually positioned at the four corners of the sound-generating device or along its short axis. This means that clearance space is provided at the four corners or short axis of the magnetic circuit system 1 to provide installation space or position for the centering bracket 23. However, this arrangement occupies part of the space in the magnetic circuit system 1, limiting the size of the side magnet 131 and resulting in a lower magnetic field strength, reduced BL value, and consequently affecting the acoustic performance of the sound-generating device.

[0027] In this embodiment, by providing a mounting hole 15 through the magnetic yoke 11 and the central magnetic part 12 in the magnetic circuit system 1, and setting a conductive bracket 3 in the mounting hole 15, one end of the centering support plate 23 (i.e., the first connecting part 231) is connected to the conductive bracket 3 and electrically connected to the pad of the conductive bracket 3. The other end of the centering support plate 23 (i.e., the second connecting part 233) is connected to the diaphragm assembly 21 and electrically connected to the lead wire of the voice coil 22. In this way, external current is introduced into the voice coil 22 through the conductive bracket 3 and the centering support plate 23. At the same time, the centering support plate 23 plays a centering role on the vibration of the voice coil 22, preventing the voice coil 22 from swinging or polarizing during vibration, thereby improving the sound production effect and acoustic performance of the sound generating device.

[0028] It should be noted that the magnetic field utilization rate at the central position of the central magnetic part 12 of the magnetic circuit system 1 is low. By setting the mounting hole 15 on the magnetic circuit system 1, for example, setting the mounting hole 15 at the central position of the central magnetic part 12 of the magnetic circuit system 1 where the magnetic field utilization rate is low, it is possible to reduce weight and fix the conductive bracket 3 without having a significant impact on the magnetic field strength of the magnetic circuit system 1. Moreover, since the centering support 23 is set in the middle of the diaphragm assembly 21 and connected to the conductive bracket 3 set in the mounting hole 15 in the middle of the central magnetic part 12, the centering support 23 does not occupy the setting space of the side magnetic part 13, thereby increasing the volume of the side magnetic part 13, improving the magnetic field strength of the magnetic circuit system 1, and thus improving the BL value and the acoustic performance of the sound-generating device. Furthermore, since there is magnetic leakage at the central position of the central magnetic part 12, the mounting hole 15 needs to be formed by removing at least a portion of the central magnet 121 at the central position of the central magnetic part 12. This can reduce the amount of magnetic leakage of the central magnet 121. When the sound-generating device is assembled with an electronic device, the impact of magnetic leakage of the central magnet 121 in the sound-generating device on the performance of the electronic device can be reduced, thus meeting the requirements of the electronic device for the amount of magnetic leakage.

[0029] Optionally, the mounting hole 15 can be a round hole, an oval hole, a square hole, a triangular hole, or other polygonal or irregularly shaped hole. The specific selection and setting are based on actual needs and are not limited here.

[0030] The sound-generating device of this embodiment of the invention comprises a magnetic circuit system 1 consisting of a magnetic yoke 11, a central magnetic portion 12 and a side magnetic portion 13 disposed on the magnetic yoke 11, such that the side magnetic portion 13 is located outside the central magnetic portion 12 and forms a magnetic gap 14 with the central magnetic portion 12; and a vibration system 2 consisting of a diaphragm assembly 21, a voice coil 22 and a centering support 23 opposite to the magnetic circuit system 1, such that one end of the voice coil 22 is connected to the diaphragm assembly 21 and the other end of the voice coil 22 is suspended within the magnetic gap 14. A current is passed through the voice coil 22, causing it to convert electrical energy into mechanical energy within the magnetic gap 14 formed by the magnetic circuit system 1. This mechanical energy drives the voice coil 22 to vibrate the diaphragm assembly 21, thereby producing sound. Simultaneously, a mounting hole 15 is provided in the magnetic circuit system 1, connecting the magnetic yoke 11 and the central magnetic part 12. A conductive support 3 is placed within the mounting hole 15, allowing one end of the centering support 23 (i.e., the first connecting part 231) to connect to the conductive support 3 and be electrically connected to the pads of the conductive support 3. The other end of the centering support 23 (i.e., the second connecting part 233) is connected to the diaphragm assembly 21 and electrically connected to the lead wire of the voice coil 22. Thus, the conductive bracket 3 can be used to both install and fix the centering support 23 and allow the voice coil 22 to be connected and conductive to the external circuit through the centering support 23 and the conductive bracket 3. At the same time, the centering support 23 can effectively prevent the voice coil 22 from swaying or polarizing, thereby improving the acoustic performance of the sound-generating device. Furthermore, by setting the mounting hole 15 in the central position of the central magnetic part 12 of the magnetic circuit system 1 where the magnetic field utilization rate is not high, both weight reduction and installation and fixation of the conductive bracket 3 can be achieved. Moreover, since the centering support 23 is located in the middle of the diaphragm assembly 21 and connected to the conductive bracket 3 in the mounting hole 15 in the middle of the magnetic yoke 11, the centering support 23 does not occupy the setting space of the side magnetic part 13, thereby increasing the volume of the side magnetic part 13, thereby increasing the magnetic field strength of the magnetic circuit system 1, and thus increasing the BL value and improving the acoustic performance of the sound-generating device.Furthermore, the centering support 23 includes a first connecting portion 231, an elastic arm 232, and a second connecting portion 233 connected in sequence. The first connecting portion 231 is lower than the second connecting portion 233. The projections of the first connecting portion 231 and the second connecting portion 233 along the vibration direction of the diaphragm assembly 21 do not overlap. The elastic arm 232 includes a first oblique connecting segment 2321 and a second oblique connecting segment 2322 connected in sequence. The first oblique connecting segment 2321 and the second oblique connecting segment 2322 have a smooth transition. The first oblique connecting segment 232... The included angle between the first and second oblique connecting sections 2322 is an obtuse angle. Thus, compared with the existing technology where the elastic arm of the centering support plate is designed to be bent horizontally, occupying a large amount of horizontal space and resulting in a reduction in the size of the magnetic circuit in the horizontal direction, in this embodiment, the elastic arm 232 of the centering support plate 23 is an obtuse L-shaped structure extending in the vertical plane, which has a good elastic effect and greatly reduces the horizontal space occupied, thereby increasing the size of the central magnetic part 12 in the horizontal direction, ensuring the volume of the central magnetic part 12 and improving the acoustic performance of the sound-generating device.

[0031] Understandably, the angle (i.e., the aforementioned obtuse angle) between the first oblique connecting segment 2321 and the second oblique connecting segment 2322 can face away from the diaphragm assembly 21; however, it is preferable that... Figure 4 As shown, the opening faces the diaphragm assembly 21 to make full use of the longitudinal space, improve the elasticity of the elastic arm 232, and avoid the risk of interference between the elastic arm 232 and the diaphragm assembly 21.

[0032] In one implementation, such as Figure 6-8 As shown, the elastic arm 232 also includes a straight section 2323 disposed between the first connecting part 231 and the first inclined connecting section 2321, and a vertical section 2324 disposed between the second connecting part 233 and the second inclined connecting section 2322. The straight section 2323 is located in the plane of the first connecting part 231, and the vertical section 2324 is perpendicular to the straight section 2323. In this way, the Z-direction space can be fully utilized, the length of the elastic arm 232 can be increased, the elasticity of the elastic arm 232 can be improved, and the space occupied by the elastic arm 232 in the horizontal direction can be reduced.

[0033] Optionally, the straight section 2323, the first oblique connecting section 2321, the second oblique connecting section 2322 and the vertical section 2324 are all smoothly transitioned, and the vertical section 2324 and the second connecting part 233 are smoothly transitioned, so that the stress of the elastic arm 232 is evenly distributed.

[0034] In one embodiment, the centering support 23 includes two parts. The two centering supports 23 can connect the two leads of the voice coil 22 to the external circuit respectively, and can also ensure the vibration balance of the sound-generating device. The two centering supports 23 are centrally symmetrically distributed around the center of the magnetic circuit system 1. Furthermore, the first connecting part 231 of the two centering supports 23 is integrally provided to reduce the number of parts and improve the convenience of processing.

[0035] Optionally, the first connecting part 231, the elastic arm 232 and the second connecting part 233 of the centering support 23 are integrally formed, which can effectively ensure the structural strength of the centering support 23 and simplify the processing steps of the centering support 23.

[0036] Optionally, the centering support 23 includes two, which are arranged along the long axis of the magnetic circuit system 1, and the first connecting portion 231 of the two centering supports 23 is along the long axis of the magnetic circuit system 1 (see reference). Figure 6-8 The first connecting part 231 is arranged relative to the magnetic circuit system 1 along the short axis or the long axis (not shown) to reduce the space occupied by the magnetic circuit system 1 in the short axis or the long axis direction. In specific implementation, the first connecting part 231 can be flexibly arranged relative to the magnetic circuit system 1 along the long axis or the short axis direction according to the size and specifications of the sound generating device.

[0037] Optionally, the first connecting portion 231 is provided with a first solder pad 2311, and the second connecting portion 233 is provided with a second solder pad 2331. The first solder pad 2311 is electrically connected to the solder pad of the conductive support 3 for electrical connection with an external circuit, and the second solder pad 2331 is electrically connected to the lead 221 of the voice coil 22 for powering the voice coil 22. It is understood that the intermediate solder pads of the two centering supports 23 (i.e., the two first solder pads 2311) can be in the form of transverse solder pads (e.g.,...). Figure 6-8 (as shown), or it can be a vertical pad (not shown).

[0038] In one implementation, such as Figure 3-5 As shown, the central magnetic part 12 includes a central magnet 121 and a central washer 122 stacked together. The central magnet 121 is sandwiched between the magnetic yoke 11 and the central washer 122. The mounting hole 15 passes through the magnetic yoke 11, the central magnet 121, and the central washer 122 in sequence. This effectively reduces the weight of the central magnetic part 12 by utilizing the mounting hole 15. Since the magnet in the middle position of the central magnetic part 12 contributes less to the magnetic field strength, the conductive support 3 can be installed and fixed with minimal impact on the magnetic field strength.

[0039] In the embodiment shown in the figure, the elastic arm 232 of the centering support 23 also extends along the long axis of the magnetic circuit system 1; it should be noted that the elastic arm 232 extends in a plane parallel to the vibration direction of the diaphragm assembly 21. Figure 4 and Figure 7-8 As shown, the elastic arm 232 has a length L1 along the major axis of the magnetic circuit system 1 (that is, the length projected along the vibration direction of the diaphragm assembly 21) and a width W1 along the minor axis of the magnetic circuit system 1 (the width of the body of the elastic arm 232). The width W1 is 0.2mm-0.4mm, such as 0.2mm, 0.22mm, 0.25mm, 0.28mm, 0.3mm, 0.35mm, 0.4mm, etc., and the length L1 (including the wall thickness of the body of the elastic arm 232) is 0.4mm-1mm, such as 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc. In this way, the width and length of the elastic arm 232 in the horizontal direction are greatly reduced, thereby greatly reducing the occupation of the central magnetic part 12, which can fully expand the volume of the central magnetic part 12 and improve the acoustic performance of the sound-generating device.

[0040] like Figure 3-4 , Figure 7-8 As shown, the elastic arm 232 of the centering support 23 extends along the long axis of the magnetic circuit system 1. The central magnetic part 12 is provided with a clearance structure 123 corresponding to the centering support 23. The clearance structure 123 is connected to the mounting hole 15. The clearance structure 123 includes a through hole 1231 that passes through the central magnet 121 and the central washer 122.

[0041] In one specific embodiment, there are two through holes 1231, which are respectively connected to the two ends of the mounting hole 15 along the long axis of the magnetic circuit system 1. Along the short axis of the magnetic circuit system 1, the width W2 of the through hole 1231 is 0.4mm-0.6mm, such as 0.45mm, 0.5mm, 0.55mm, etc. Along the long axis of the magnetic circuit system 1, the distance L4 from the outer edge of the through hole 1231 to the center of the magnetic circuit system 1 is 2mm-3mm, such as 2.2mm, 2.5mm, 2.8mm, etc., so as to provide space for the elastic arm 232 of the centering support 23 and the conductive bracket 3 by utilizing the through hole 1231 and the mounting hole 15, while reducing the space occupied by the magnetic circuit system 1, maximizing the size of the central magnetic circuit 12, thereby ensuring the sound generation effect of the sound generating device. It should be noted that the distance from the outer edge of the through hole 1231 to the center of the magnetic circuit system 1 is the horizontal distance from the outer edge of the through hole 1231 to the center of the magnetic circuit system 1, that is, the distance measured along the vibration direction perpendicular to the diaphragm assembly 21.

[0042] In one specific embodiment, the mounting hole 15 is a rectangular hole along the minor axis of the magnetic circuit system 1. The opening width W3 at the mounting hole 15 can be 1mm-3mm, such as 1mm, 1.5mm, 2mm, 2.5mm, 3mm, etc. In this embodiment, the total opening area of ​​the central magnetic part 12 is 7.1mm². 2 The total area of ​​the central magnetic part 12 without holes is 62.2 mm².2 Therefore, the opening ratio is 11.4%. Since the elastic arm 232 of the centering support 23 is an obtuse-angled L-shaped structure extending vertically inward, it has excellent elasticity and occupies significantly less horizontal space. This greatly reduces the opening area on the central magnetic part 12, allowing for a substantial increase in the magnet area, ensuring the volume of the central magnetic part 12, and improving the acoustic performance of the sound-generating device. Furthermore, along the long axis of the magnetic circuit system 1, the length L4 of the mounting hole 15 is 1.5mm-3mm, which can be 1.5mm, 2.0mm, 2.5mm, 3mm, etc. This satisfies the installation space requirements of the conductive bracket 3 and its pads without excessively reducing the size of the central magnetic part 12, thus improving the acoustic performance of the sound-generating device.

[0043] Optionally, along the long axis of the magnetic circuit system 1, the length L3 of the second connecting part 233 is 0.4mm-0.8mm, such as 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc. The second connecting part 233 is small in size, which can reduce the impact on the vibration performance of the diaphragm assembly 21 after connection with the diaphragm assembly 21 while ensuring the connection performance with the lead wire 221 of the voice coil 22.

[0044] Optionally, the clearance structure 123 may also include an enlarged hole 1233 penetrating the central washer 122. The enlarged hole 1233 connects to the side of the through hole 1231 away from the mounting hole 15. Along the short axis of the magnetic circuit system 1, the width W4 of the enlarged hole 1233 is 0.6mm-1mm, such as 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc., to avoid the second connecting portion 233 of the centering support 23. It is understood that the enlarged hole 1233 may also be a blind hole, such as in the form of a groove.

[0045] Optionally, the avoidance structure 123 may also include a first groove 1232 formed by a surface recess of the central washer 122 away from the magnetic yoke 11 and extending through the periphery of the central washer 122 along the long axis of the magnetic circuit system 1, so as to avoid the lead wire 221 of the voice coil 22, ensure the stability of the connection between the lead wire 221 of the voice coil 22 and the centering support 23, and improve the service life of the sound-generating device.

[0046] Optionally, along the short axis of the magnetic circuit system 1, the central washer 122 may be provided with clearance grooves 1221 on both sides of the mounting hole 15 to avoid the diaphragm assembly 21, provide it with deformation and vibration space, and ensure the sound generation effect of the sound generating device.

[0047] Understandably, the central washer 122 forms the first through hole, the central magnet 121 forms the second through hole, and the magnetic yoke 11 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 15.

[0048] Optionally, the central magnetic part 12 may be arranged in a ring structure, such that a through hole structure is formed in the center of the central magnetic part 12. Of course, in other embodiments, the central magnetic part 12 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.

[0049] Understandably, the central magnet 121 may optionally be arranged in a ring shape, such that a through hole is formed in the center of the central magnet 121. Of course, in other embodiments, there may be multiple central magnets 121, which are arranged in a ring to form a mounting hole 15, i.e., multiple central magnets 121 are arranged in a ring to form a through hole. The central washer 122 is arranged in a ring shape, such that a through hole is formed in the center of the central washer 122. Of course, in other embodiments, there may be multiple central washer 122, which are arranged in a ring to form a mounting hole 15, i.e., multiple central washer 122 are arranged in a ring to form a through hole; this is not limited here.

[0050] In one embodiment, the edge magnetic portion 13 may optionally be arranged in a closed ring shape. In this case, the ring-shaped edge magnetic portion 13 is located outside the central magnetic portion 12 and is spaced apart from the central magnetic portion 12 to form a magnetic gap 14. Of course, in other embodiments, there may be multiple edge magnetic portions 13, which are arranged around the outside of the central magnetic portion 12 and are spaced apart from the central magnetic portion 12 to form a magnetic gap 14. Adjacent edge magnetic portions 13 are connected end to end to form a closed ring structure, which is not limited here.

[0051] In one implementation, such as Figure 3-5 As shown, the side magnetic section 13 includes a side magnet 131 and a side washer 132 stacked together, with the side magnet 131 sandwiched between the magnetic yoke 11 and the side washer 132. In this embodiment, the central magnet 121 and the side magnet 131 may be permanent magnets, and the central washer 122 and the side washer 132 may be magnetic plate structures, which are not limited here.

[0052] Optionally, both the side magnets 131 and the side washer 132 form closed ring structures. In this case, the side magnetic portion 13 forms a closed ring structure and is arranged around the outside of the central magnetic portion 12. Of course, in other embodiments, there are multiple side magnets 131 and side washer 132, and they are arranged in a one-to-one correspondence. Adjacent side magnets 131 are connected end to end to form a closed ring structure, and adjacent side washer 132 are connected end to end to form a closed ring structure. In this case, there are multiple side magnetic portions 13, and the multiple side magnetic portions 13 are connected end to end to form a closed ring structure, which is not limited here.

[0053] It should be noted that in this embodiment of the invention, the centering support 23 is disposed in the middle of the diaphragm assembly 21 and connected to the conductive bracket 3 disposed in the mounting hole 15 in the middle of the magnetic yoke 11. Compared with the traditional scheme where the centering support 23 is disposed at the four corners of the magnetic circuit system 1, the centering support 23 in this embodiment of the invention does not occupy the setting space of the side magnet 13. There is no need to set a accommodating space for the centering support 23 between two adjacent side magnets 131, so that the side magnets 131 can be set into a closed ring structure. This can increase the setting volume of the side magnets 131, improve the magnetic field strength of the magnetic circuit system 1, and thus improve the BL value.

[0054] In one implementation, such as Figure 4 As shown, the conductive support 3 has a first welding surface 311 and a second welding surface 312 arranged opposite to each other. The first welding surface 311 faces the centering support piece 23 and is connected to it. The second welding surface 312 is used to connect to an external power source. Thus, the first welding surface 311 is connected to the centering support piece 23 for conductivity, and the second welding surface 312 is connected to the external power source, allowing the conductive support 3 to connect the external circuit to the centering support piece 23 for conductivity, thereby supplying power to the voice coil 22. It is understood that the first connecting portion 231 of the centering support piece 23 is fixed to the first welding surface 311, and the first solder pad 2311 is connected to the first welding surface 311 for conductivity.

[0055] Optionally, along the vibration direction of the vibration system 2, the first welding surface 311 is not higher than the side surface of the central magnet 12 facing the diaphragm assembly 21. This arrangement facilitates the installation of the centering support 23 without affecting the diaphragm assembly 21, and also ensures that the centering support 23 has sufficient vibration space during vibration.

[0056] In one implementation, such as Figure 4 As shown, the conductive bracket 3 has a second groove 313 on the side opposite to the first welding surface 311. The bottom wall of the second groove 313 forms a second welding surface 312, thereby providing installation space for the conductive line or flexible circuit board 4 used to connect the conductive bracket 3 and protecting the conductive line or flexible circuit board 4.

[0057] In one implementation, such as Figure 4As shown, 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 welding surface 311, and at least a portion of the second pad portion 322 is exposed on the second welding surface 321. This facilitates the connection and conduction between the centering support 23 and the first pad portion 321 of the first welding surface 311. The conductive lines of the external circuit or the flexible circuit board 4 are connected and conducted to the second pad portion 322 of the second welding surface 312, thereby smoothly conducting the external current to the voice coil 22 through the conductive support 3 and the centering support 23.

[0058] Understandably, the first welding surface 311 is provided with two first pad contacts. In this embodiment, the first pad portion 321 of the pad piece 32 exposes two spaced-apart first pad contacts on the first welding surface 311 to electrically connect the two centering supports 23 respectively. Optionally, the two first pad contacts are arranged at intervals along the long axis of the magnetic circuit system 1 (e.g., ...). Figure 9 (as shown); or, the two first pad contacts are arranged at intervals along the short axis of the magnetic circuit system 1.

[0059] 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 arranged at intervals along the long axis of the magnetic circuit system 1 (e.g., Figure 2 (as shown); or, the two second pad contacts are arranged at intervals along the short axis of the magnetic circuit system 1.

[0060] In one embodiment, the conductive support 3 and the magnetic yoke 11 are integrally injection molded. It is understood that the main body 31 of the conductive support 3 is a plastic part, the pad 32 can be a metal conductive part, and the magnetic yoke 11 is a metal magnetic plate. The main body 31, pad 32, and magnetic yoke 11 of the conductive support 3 can optionally be integrally injection molded, which can improve the installation stability of the conductive support 3 and the magnetic yoke 11, while simplifying the processing and assembly steps.

[0061] In one implementation, such as Figure 4 As shown, a positioning platform 111 is provided near the mounting hole 15 on the magnetic yoke 11, and a positioning groove 314 is provided on the conductive bracket 3 corresponding to the positioning platform 111. The positioning platform 111 is embedded in the positioning groove 314, thereby using the positioning platform 111 to further install, fix and position the conductive bracket 3. It can be understood that when the conductive bracket 3 and the magnetic yoke 11 are injection molded, the positioning platform 111 is embedded in the main body 31 of the conductive bracket 3 to form the positioning groove 314 on the conductive bracket 3. That is, the positioning groove 314 corresponds to the positioning platform 111, and the positioning platform 111 is embedded in the positioning groove 314.

[0062] Understandably, the positioning platform 111 is positioned adjacent to the mounting hole 15. Optionally, the positioning platform 111 may be a protrusion extending toward the side facing the diaphragm assembly 21; or, the positioning platform 111 may be a protrusion extending toward the side away from the diaphragm assembly 21, without limitation.

[0063] In one embodiment, the positioning platform 111 is formed by bending the side of the magnetic yoke 11 adjacent to the mounting hole 15, that is, the positioning platform 111 is formed by bending the side of the magnetic yoke 11 adjacent to the third through hole. Optionally, the positioning platform 111 and the magnetic yoke 11 are integrally formed, which simplifies the processing steps of the magnetic yoke 11 and improves the structural strength of the positioning platform 111. Of course, in other embodiments, the positioning platform 111 and the magnetic yoke 11 can also be separately arranged, with the positioning platform 111 connected to the magnetic yoke 11 by welding or bonding, which is not limited here.

[0064] In this embodiment, the magnetic yoke 11 is bent into a positioning platform 111 by stamping. Optionally, the positioning platform 111 is formed by bending the side of the magnetic yoke 11 adjacent to the mounting hole 15 toward the side near the diaphragm assembly 21; this is not limited here. In this way, the side of the magnetic yoke 11 facing away from the diaphragm assembly 21 is arranged in a planar manner, which facilitates the assembly of the sound-generating device into electronic equipment. At the same time, the positioning platform 111 can be used to position and limit the central magnet 12 and the conductive support 3.

[0065] In one implementation, such as Figure 2 As shown, the magnetic yoke 11 has a first groove 112 on the side away from the diaphragm assembly 21. One end of the first groove 112 is connected to the mounting hole 15, and the other end of the first groove 112 passes through the periphery of the magnetic yoke 11. This allows the first groove 112 to avoid wiring, preventing the wiring from protruding from the magnetic yoke 11 and reducing the overall size of the sound-generating device. At the same time, the periphery of the side of the magnetic yoke 11 away from the diaphragm assembly 21 also has a second groove 113. The second groove 113 is used to provide clearance space for installing a cover with sound-absorbing particles or for mounting on the module housing.

[0066] Understandably, the first connecting portion 231 of the centering support 23 of the sound-generating device is connected to an external circuit via a conductive line or flexible circuit board 4, etc. At this time, the first pressing groove 112 on the side of the magnetic yoke 11 facing away from the diaphragm assembly 21 provides routing space for the conductive line or flexible circuit board 4, etc., and positions and limits the installation of the routing structure, thereby making the overall structure more compact and saving space. Optionally, the first pressing groove 112 and the second pressing groove 113 are formed by a recess on the side of the magnetic yoke 11 facing away from the diaphragm assembly 21.

[0067] In one implementation, such as Figure 3-5 and Figure 10As shown, the diaphragm assembly 21 includes a diaphragm 211, a first dome 212, a second dome 213, and a frame 214. The diaphragm 211 is disposed opposite to the magnetic circuit system 1. The diaphragm 211 has an inner ring hole 2114 in the center. The first dome 212 covers the inner ring hole 2114 and is connected to the diaphragm 211. The second connecting part 233 is connected to the first dome 212. The first dome 212 has an assembly hole 2123 in the center. The second dome 213 covers the assembly hole 2123.

[0068] In this embodiment, the diaphragm assembly 21 is configured as a diaphragm 211, a first dome 212, and a second dome 213. The periphery of the diaphragm 211 is connected to the outer shell 5, and an inner ring hole 2114 is formed in the center of the diaphragm 211. The first dome 212 is placed over the inner ring hole 2114, thereby connecting and fixing the centering support 23 and improving installation stability. It is understood that, in order to seal the assembly hole 2123, a second dome 213 is provided at the assembly hole 2123, covering the assembly hole 2123. This not only seals the assembly hole 2123 but also ensures the vibration performance of the diaphragm assembly 21.

[0069] Optionally, the diaphragm assembly 21 may also include a frame 214, one end of which is connected to the first dome 212 along the vibration direction of the vibration system 2, and the other end of which is connected to the voice coil 22.

[0070] In one embodiment, the diaphragm 211 includes a folded ring portion 2111, a fixing portion 2112 connected to the outside of the folded ring portion 2111, and an inner ring portion 2113 connected to the inside of the folded ring portion 2111. The inner ring portion 2113 forms an inner ring hole 2114. The periphery of the first dome 212 is connected to the inner ring portion 2113 and is located between the voice coil 22 and the inner ring portion 2113.

[0071] Optionally, the outer periphery of the first dome 212 is recessed towards the side where the magnetic circuit system 1 is located to form a first stepped surface 2121. The diaphragm 211 is supported and connected (specifically, it can be bonded or integrally injection molded) to the first stepped surface 2121 on the side adjacent to the inner ring hole 2114 (i.e., the inner ring portion 2113). The first stepped surface 2121 is located between the voice coil 22 and the diaphragm 211. The inner periphery of the first dome 212 is recessed towards the side where the magnetic circuit system 1 is located to form a second stepped surface 2122. The second dome 213 is supported and connected (specifically, it can be bonded or integrally injection molded) to the second stepped surface 2122. The second stepped surface 2122 is located between the voice coil 22 and the second dome 213.

[0072] In this embodiment, by providing a first stepped surface 2121 on the outer periphery of the first dome 212, and making the first stepped surface 2121 recessed towards the voice coil 22, it is ensured that when the inner ring portion 2113 of the diaphragm 211 overlaps and is supported on the first stepped surface 2121 of the first dome 212, the upper surface of the inner ring portion 2113 of the diaphragm 211 is not higher than the upper surface of the first dome 212. At the same time, by providing a second stepped surface 2122 on the inner periphery of the first dome 212, and making the second stepped surface 2122 recessed towards the voice coil 22, it is ensured that when the second dome 213 overlaps and is supported on the second stepped surface 2122 of the first dome 212, the upper surface of the second dome 213 is not higher than the upper surface of the first dome 212. This reduces the height of the sound-generating device along the vibration direction of the vibration system 2, making the assembly structure more compact, and ensuring the vibration performance of the entire diaphragm assembly 21.

[0073] Understandably, the fixing portion 2112, the folded ring portion 2111, and the inner ring portion 2113 of the diaphragm 211 can be sequentially connected to form an integral structure, thereby ensuring the vibration performance and structural strength of the diaphragm 211. For example, the fixing portion 2112, the folded ring portion 2111, and the inner ring portion 2113 of the diaphragm 211 can be made of the same material as integral structural components, and the configuration can be selected according to actual usage requirements. In this embodiment, the folded ring portion 2111 has an upwardly convex bulge structure or a downwardly concave concave structure, which is not limited here. Optionally, the first dome 212 and the second dome 213 are formed as a vibrating plate, and the vibrating plate is made of metal or fiber material.

[0074] In one embodiment, the frame 214 includes a main body 2141, a first bent portion 2142 located at one end of the main body 2141 along the vibration direction and extending outward, and a second bent portion 2143 located at the other end of the main body 2141 along the vibration direction and extending inward. The first bent portion 2142 is connected to the first dome 212, and the second bent portion 2143 is connected to the voice coil 22. Thus, the frame 214 is Z-shaped, which improves the overall structural strength of the frame 214 and facilitates a firm connection between the voice coil 22 and the diaphragm assembly 21. At the same time, the inner side of the frame 214 provides routing and clearance space for the lead wires of the voice coil 22, thereby making the assembly structure more compact and ensuring the vibration performance of the entire diaphragm assembly 21.

[0075] Understandably, one end of the centering support 23 needs to be connected to the conductive bracket 3, and the other end needs to be connected to the diaphragm assembly 21. Therefore, to facilitate the connection of the two ends of the centering support 23 and the assembly of the entire sound-generating device, the assembly process of the sound-generating device in this embodiment of the invention differs from the prior art. The specific assembly process can be referred to as follows: First, the diaphragm 211, the first dome 212, and the frame 214 are assembled to obtain a diaphragm assembly 21 without the second dome 213. Then, one end of the centering support 23 and the voice coil 22 are connected to the diaphragm assembly 21 to obtain the voice coil & support & diaphragm assembly. After that, the voice coil & support & diaphragm assembly is connected to the housing 5 to obtain the diaphragm & housing assembly. At the same time, the magnetic yoke 11 with the conductive support 3, each magnet, and the corresponding washer are assembled into a magnetic circuit assembly. Then, the magnetic circuit assembly and the diaphragm & housing assembly are combined. It can be understood that since the diaphragm assembly 21 does not have the second dome 213, the mounting hole 2123 in the center of the first dome 212 is in an open state. At this time, the other end of the centering support 23 is connected to the conductive support 3 through the mounting hole 2123 to obtain a semi-finished product. Finally, the second dome 213 is connected to the semi-finished product to obtain the finished sound-generating device. Based on this, the flexible circuit board 4 is connected to obtain the finished sound-generating module 100.

[0076] On the other hand, the present invention provides a sound-generating module 100, which includes the sound-generating device described above. The specific structure of the sound-generating device is as described in the foregoing embodiments. Since the sound-generating module 100 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.

[0077] In one embodiment, the sound-generating module 100 further includes a flexible circuit board 4, one end of which is electrically connected to the conductive support 3 of the sound-generating device, and the other end of which is used to connect to an external power source.

[0078] Understandably, the flexible circuit board 4 is used to connect and conduct external circuitry to the sound-generating device. The flexible circuit board 4 has inner and outer pads. The inner pad of the flexible circuit board 4 is connected and conducts to the second welding surface 312 of the conductive support 3 of the sound-generating device, and the outer pad of the flexible circuit board 4 is used to connect to external terminals.

[0079] In this embodiment, the sound-generating module 100 further includes a module housing with a cavity. The sound-generating device is disposed within the cavity of the module housing, and at least one end of the flexible circuit board 4 connected to the sound-generating device is located within the cavity of the module housing. Of course, in other embodiments, the flexible circuit board 4 may also be entirely disposed within the cavity of the module housing, which is not limited here.

[0080] Furthermore, embodiments of the present invention provide an electronic device including the aforementioned sound-generating device. The specific structure of this sound-generating device is as described in the foregoing embodiments. Since this electronic device employs all the technical solutions of all the foregoing embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be elaborated upon here.

[0081] In this embodiment, the electronic device also includes a device housing, and the sound-generating device and flexible circuit board 4 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.

[0082] In another aspect, embodiments of the present invention provide an electronic device including the aforementioned sound-emitting module 100. The specific structure of the sound-emitting module 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 elaborated here.

[0083] In this embodiment, the electronic device also includes a device housing, and the sound-emitting module 100 is 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.

[0084] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0085] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

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

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

Claims

1. A sound-generating device, characterized in that, include: A magnetic circuit system, 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 comprising a diaphragm assembly, a voice coil, and a centering support. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is suspended within the magnetic gap. The centering support comprises a first connecting portion, an elastic arm, and a second connecting portion connected in sequence. The first connecting portion is connected to the conductive support and electrically connected to the pads of the conductive support. The second connecting portion is connected to the diaphragm assembly and electrically connected to the leads of the voice coil. Wherein, the first connecting part is lower than the second connecting part, the projections of the first connecting part and the second connecting part along the vibration direction of the diaphragm assembly do not overlap, the elastic arm includes a first oblique connecting segment and a second oblique connecting segment connected in sequence, the first oblique connecting segment and the second oblique connecting segment have a smooth transition, and the included angle between the first oblique connecting segment and the second oblique connecting segment is an obtuse angle.

2. The sound-generating device according to claim 1, characterized in that, The included angle between the first oblique connecting segment and the second oblique connecting segment is 100 degrees to 150 degrees; And / or, the angled opening between the first oblique connecting segment and the second oblique connecting segment faces the diaphragm assembly.

3. The sound-generating device according to claim 1, characterized in that, The elastic arm further includes a straight section disposed between the first connecting portion and the first oblique connecting segment, and a vertical section disposed between the second connecting portion and the second oblique connecting segment. The straight section is located in the plane of the first connecting portion, and the vertical section is perpendicular to the straight section.

4. The sound-generating device according to claim 1, characterized in that, The centering support includes two, which are centrally symmetrically distributed around the center of the magnetic circuit system, and the first connecting part of the two centering support is an integrally formed structure. And / or, the centering support includes two, the two centering supports are arranged along the long axis of the magnetic circuit system, and the first connecting portions of the two centering supports are arranged opposite each other along the long axis or short axis of the magnetic circuit system; And / or, the elastic arm extends along the long axis of the magnetic circuit system, and the elastic arm extends in a plane parallel to the vibration direction of the diaphragm assembly, the width of the elastic arm is 0.2mm-0.4mm, and the length of the projection of the elastic arm along the vibration direction of the diaphragm assembly is 0.4mm-1mm; And / or, along the long axis of the magnetic circuit system, the length of the second connection portion is 0.4mm-0.8mm; And / or, the first connecting portion is provided with a first pad, the second connecting portion is provided with a second pad, 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.

5. The sound-generating device according to 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 magnetically conductive yoke and the central washer. The mounting hole sequentially passes through the magnetically conductive yoke, the central magnet, and the central washer. The central magnetic part has a clearance structure corresponding to the centering support piece. The clearance structure communicates with the mounting hole and includes a through hole passing through the central magnet and the central washer, wherein: Along the minor axis of the magnetic circuit system, the width of the through hole is 0.4mm-0.6mm, and along the major axis of the magnetic circuit system, the distance from the outer edge of the through hole to the center of the magnetic circuit system is 2mm-3mm. And / or, the clearance structure further includes an enlarged hole penetrating the central washer, the enlarged hole connecting the through hole to the side away from the mounting hole, along the short axis direction of the magnetic circuit system, the width of the enlarged hole being 0.6mm-1mm; And / or, the mounting hole is a rectangular hole, along the short axis of the magnetic circuit system, and the width of the mounting hole is 1mm-3mm; And / or, the avoidance structure further includes a first groove formed by a surface recess of the central washer away from the magnetic yoke and extending through the periphery of the central washer along the long axis of the magnetic circuit system; And / or, along the short axis of the magnetic circuit system, the central washer is provided with clearance grooves on both sides of the mounting hole that communicate with the mounting hole.

6. The sound-generating device according to claim 1, 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 and adjacent side washers connected end to end to form a closed ring structure.

7. The sound-generating device according to 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 not higher than the surface of the central magnet facing the diaphragm assembly. The conductive support has a second groove on the side opposite to the first welding surface, and the bottom wall of the second groove forms the second welding surface; and / or, the conductive support includes a main body and a pad, the pad is embedded in the main body, the pad includes a first pad portion and a second pad portion connected to each other, at least a portion of the first pad portion is exposed on the first welding surface, and at least a portion of the second pad portion is exposed on the second welding surface; And / or, the conductive support and the magnetic yoke are integrally injection molded.

8. The sound-generating device according to any one of claims 1-7, characterized in that, The diaphragm assembly includes: A diaphragm is disposed opposite to the magnetic circuit system, and an inner ring hole is provided in the center of the diaphragm; A first dome is provided on the inner ring hole and connected to the diaphragm; a second connecting part is connected to the first dome; and an assembly hole is provided in the center of the first dome. The second dome is disposed on the assembly hole.

9. The sound-generating device according to claim 8, characterized in that, The diaphragm assembly further includes a frame, one end of which is connected to the first dome along the vibration direction of the vibration system, and the other end of which is connected to the voice coil along the vibration direction.

10. A sound-generating module, characterized in that, include: Module housing; The sound-generating device according to any one of claims 1-9, wherein the sound-generating device is disposed within the module housing; 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.

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