Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electro-acoustic energy conversion, the sound production device comprises a magnetic circuit system, a vibration system and a conductive support, the magnetic circuit system comprises a magnetic conductive yoke, and a center magnetic circuit and a side magnetic circuit which are arranged on the magnetic conductive yoke, the side magnetic circuit is located at the periphery of the center magnetic circuit, and the side magnetic circuit and the center magnetic circuit are arranged at an interval to form a magnetic gap; the side magnetic circuit comprises two side magnets and a side magnetic conductive plate; the side magnetic conductive plate comprises two long side magnetic conductive parts and two short side magnetic conductive parts, each short side magnetic conductive part comprises a magnetic conductive part body and an extension part, and the extension parts extend towards the magnetic conductive yoke; the vibration system comprises a centering disk, a vibrating diaphragm and a voice coil, the magnetic circuit system is provided with a mounting hole, and the conductive support is embedded in the mounting hole. By arranging the extension part, the magnetic loops on the two sides of the voice coil along the long axis direction of the central magnetic circuit are increased, and by arranging the conductive support, the voice coil and the magnetic circuit system can be made larger, so that the acoustic performance of the sound production device is improved.

Description

Technical Field

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

[0002] In recent years, with the rapid development of consumer electronics products, mobile phones, computers, headphones, VR devices and other products have been accepted by more and more people. As users continue to use them, their requirements for sound quality are also gradually increasing. This has forced technicians in this field to make gradual improvements to sound quality in order to meet users' growing demand for sound quality.

[0003] Sound-generating devices are important electroacoustic transducers in consumer electronics products, widely used as speakers, earpieces, headphones, and so on. For some speakers, they can meet the module filling requirements, but their performance is low; while for others, although they have better acoustic performance, it is difficult to meet the full filling requirements. Summary of the Invention

[0004] The main objective of this invention is to provide a sound-generating device and electronic device that aims to solve the problem of how to improve the acoustic performance of a loudspeaker.

[0005] To achieve the above objectives, the present invention provides a sound-generating device comprising: A magnetic circuit system, the magnetic circuit system including a magnetic yoke, a central magnetic circuit and a side magnetic circuit disposed on the magnetic yoke, the side magnetic circuit being located around the central magnetic circuit and being spaced apart from the central magnetic circuit to form a magnetic gap; The side magnetic circuit includes two side magnets respectively disposed on both sides of the central magnetic circuit along the minor axis direction of the central magnetic circuit, and a side magnetic guide plate surrounding the central magnetic circuit; the side magnetic guide plate includes two long side magnetic guide portions arranged along the minor axis direction of the central magnetic circuit and two short side magnetic guide portions arranged along the major axis direction of the central magnetic circuit, the two long side magnetic guide portions being respectively connected to the ends of the two side magnets away from the magnetic guide yoke; each short side magnetic guide portion includes a magnetic guide portion body and an extension portion disposed on the side of the magnetic guide portion body facing the magnetic guide yoke, the extension portion extending towards the magnetic guide yoke; A vibration system, comprising a centering support, a diaphragm, and a voice coil connected to the diaphragm and driving the diaphragm to vibrate along a first direction, wherein the voice coil is configured corresponding to the magnetic gap; The conductive support has a mounting hole through the central magnetic circuit and the magnetic yoke in the magnetic circuit system, and the conductive support is embedded in the mounting hole; one end of the centering support is electrically connected to the conductive support, and the other end of the centering support is connected to the diaphragm and electrically connected to the lead wire of the voice coil.

[0006] In one embodiment, the conductive support includes an insulating body and a conductive insert disposed on the insulating body. The insulating body is connected to the magnetic yoke. The conductive insert includes a first conductive portion and a second conductive portion exposed on both sides of the insulating body along the first direction. The first conductive portion is electrically connected to the second conductive portion. The first conductive portion is disposed toward the centering support piece and electrically connected to the centering support piece. The second conductive portion is used for electrical connection to an external power source.

[0007] In one embodiment, the conductive insert further includes a third conductive portion embedded in the insulating body, one end of the third conductive portion being connected to the first conductive portion, and the other end of the third conductive portion being connected to the second conductive portion; And / or, the insulating body and the magnetic yoke are integrally injection molded parts.

[0008] In one embodiment, the mounting hole has a clearance space to avoid the centering support piece; And / or, a wiring groove is provided at one end of the magnetic yoke away from the diaphragm, one end of the wiring groove is connected to the mounting hole, and the other end of the wiring groove extends toward the outer edge of the magnetic yoke and penetrates the outer edge of the magnetic yoke.

[0009] In one embodiment, the centering support includes a first fixing part, a cantilever part, a bending part, and a second fixing part connected in sequence. The first fixing part is electrically connected to the first conductive part, the bending part extends along the first direction, one side of the second fixing part is connected to the diaphragm, and the other side of the second fixing part can also be electrically connected to the lead wire of the voice coil.

[0010] In one embodiment, the voice coil includes a square voice coil, and the extension includes a connecting segment and bent segments disposed at both ends of the connecting segment. The connecting segment corresponds to the short axis side of the square voice coil, and the bent segments correspond to two corners at both ends of the short axis side.

[0011] In one embodiment, the sound-generating device further includes a housing, one end of which is connected to the magnetic yoke, and the other end of which is connected to the outer edge of the diaphragm. The side magnetic plate and the housing are integrally injection molded parts.

[0012] In one embodiment, the diaphragm includes a folded ring, a first diaphragm plate, and a second diaphragm plate. The outer edge of the folded ring is connected to the outer shell. The folded ring is spaced apart from the magnetic circuit system. A first through hole is formed around the center of the folded ring. The first diaphragm plate is disposed corresponding to the first through hole and connected to the folded ring. The centering support plate is connected to the first diaphragm plate. A second through hole is provided at the center of the first diaphragm plate. The second diaphragm plate covers the second through hole and is connected to the first diaphragm plate. The voice coil is connected to the folded ring or the first diaphragm plate.

[0013] In one embodiment, the portion of the first vibrating plate near the second through hole is provided with a boss extending toward the centering support plate, and the boss is connected to the side of the centering support plate away from the conductive support.

[0014] In one embodiment, the central magnetic circuit includes a central magnetic plate and a central magnet stacked together, with the side of the central magnet away from the central magnetic plate connected to the magnetic yoke; The central magnetic plate is provided with a first clearance groove on the side away from the central magnet to avoid the wire of the voice coil; And / or, the central magnetic plate is provided with a second clearance groove on the side away from the central magnet to avoid the diaphragm.

[0015] The present invention also proposes an electronic device, which includes the above-described sound-generating device.

[0016] The technical solution of this invention forms a side magnetic plate by employing two long-side magnetically conductive parts and two short-side magnetically conductive parts. Each of the two short-side magnetically conductive parts includes an interconnected magnetically conductive part body and an extension. The extension is located on the side of the magnetically conductive part body facing the magnetically conductive yoke, and the extension body extends towards the magnetically conductive yoke. This increases the magnetic circuits on both sides of the voice coil along the long axis of the central magnetic circuit, thereby improving the acoustic performance of the sound-generating device. The technical solution of this invention also improves the acoustic performance of the sound-generating device by providing a conductive support, allowing the voice coil and magnetic circuit system to be made larger. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of an embodiment of the sound-generating device provided by the present invention; Figure 2A schematic diagram of the structure of an embodiment of the sound-generating device provided by the present invention from another perspective; Figure 3 An exploded structural diagram of an embodiment of the sound-generating device provided by the present invention; Figure 4 A cross-sectional structural schematic diagram of an embodiment of the sound-generating device provided by the present invention; Figure 5 A cross-sectional view of another section of an embodiment of the sound-generating device provided by the present invention; Figure 6 A cross-sectional view of another section of an embodiment of the sound-generating device provided by the present invention; Figure 7 A partial cross-sectional structural schematic diagram of an embodiment of the sound-generating device provided by the present invention; Figure 8 A schematic diagram of the structure of an embodiment of the outer shell and the edge magnetic plate provided by the present invention; Figure 9 This is a schematic diagram of the structure of an embodiment of the central magnetic guide plate provided by the present invention; Figure 10 This is a schematic diagram of the structure of an embodiment of the centering support provided by the present invention; Figure 11 This is a schematic diagram of the structure of another embodiment of the centering support provided by the present invention.

[0019] Explanation of icon numbers: 100. Sound-generating device; 1. Magnetic circuit system; 11. Magnetic yoke; 111. Wiring trough; 12. Central magnetic circuit; 121. Central magnet; 122. Central magnetic plate; 1221. First clearance groove; 1222. Second clearance groove; 13. Side magnetic circuit; 131. Side magnet; 132. Side magnetic plate; 1321. Long side magnetic section; 1322. Short side magnetic section; 1323. Magnetic section body; 1324. Extension section; 1325. Connecting section; 1326. Bending section; 14. Magnetic gap; 15. Mounting hole; 2. Vibration system; 21. Centering support; 211. First fixing part; 2111. First solder pad ; 212, Second fixing part; 2121, Second pad; 213, Cantilever part; 214, Bending part; 22, Diaphragm; 221, First diaphragm plate; 2211, Boss; 2212, Second through hole; 222, Second diaphragm plate; 223, Wrapper ring; 2231, First through hole; 23, Voice coil; 3, Conductive support; 31, Insulating body; 311, Groove; 32, Conductive insert; 321, First conductive part; 3211, First conductive pad; 322, Second conductive part; 3221, Second conductive pad; 323, Third conductive part; 4, Outer shell; 41, Connecting hole; 42, Exposed hole; 5, Mesh fabric.

[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] 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.

[0022] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions 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. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0024] In recent years, with the rapid development of consumer electronics products, mobile phones, computers, headphones, VR devices and other products have been accepted by more and more people. As users continue to use them, their requirements for sound quality are also gradually increasing. This has forced technicians in this field to make gradual improvements to sound quality in order to meet users' growing demand for sound quality.

[0025] Sound-generating devices are important electroacoustic transducers in consumer electronics products, widely used as speakers, earpieces, headphones, and so on. For some speakers, they can meet the module filling requirements, but their performance is low; while for others, although they have better acoustic performance, it is difficult to meet the full filling requirements.

[0026] The inventors discovered that existing sound-generating devices, while meeting the requirements for module filling, often have insufficient performance. Furthermore, they found that the existing voice coil wires typically wrap around the outer circumference of the voice coil and connect to pads located around its periphery. This necessitates reserving space around the voice coil for the wire routing, leading to an adaptive reduction in the overall size of the voice coil and the magnetic circuit system to accommodate the wires, ultimately resulting in lower performance of the sound-generating device.

[0027] In view of this, the present invention proposes a sound-generating device aimed at solving how to improve the acoustic performance of a loudspeaker.

[0028] Please see Figures 1 to 3 In one embodiment of the present invention, the sound-generating device 100 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 circuit 12 and a side magnetic circuit 13 disposed on the magnetic yoke 11. The side magnetic circuit 13 is located around the central magnetic circuit 12 and is spaced apart from the central magnetic circuit 12 to form a magnetic gap 14. The side magnetic circuit 13 includes two side magnets 131 respectively disposed on both sides of the central magnetic circuit 12 along the short axis direction of the central magnetic circuit 12, and a side magnetic plate 132 surrounding the central magnetic circuit 12. The central magnetic circuit 12 and the side magnets 131 are both disposed on the magnetic yoke 11. The side magnetic plate 132 includes two long side magnetic parts 1321 arranged along the short axis direction of the central magnetic circuit 12 and two short side magnetic parts 1322 arranged along the long axis direction of the central magnetic circuit 12. The side magnetic guide 1321 is connected to the ends of the two side magnets 131 away from the magnetic guide yoke 11 respectively; each short side magnetic guide 1322 includes a magnetic guide body 1323 and an extension 1324 provided on the side of the magnetic guide body 1323 facing the magnetic guide yoke 11, the extension 1324 extends towards the magnetic guide yoke 11; the vibration system 2 includes a centering support 21, a diaphragm 22 and a voice coil 23 connected to the diaphragm 22 and driving the diaphragm 22 to vibrate in a first direction, the voice coil 23 is provided corresponding to the magnetic gap 14; the magnetic circuit system 1 has a mounting hole 15 that passes through the central magnetic circuit 12 and the magnetic guide yoke 11, and the conductive support 3 is embedded in the mounting hole 15; one end of the centering support 21 is electrically connected to the conductive support 3, and the other end of the centering support 21 is connected to the diaphragm 22 and electrically connected to the lead wire of the voice coil 23.

[0029] The sound-generating device 100 of the present invention can be a miniature loudspeaker unit. The sound-generating device 100 can be applied in the sound-generating module of electronic devices, such as computers, mobile phones, smart wearable devices, laptops, virtual reality devices, augmented reality devices, mixed reality devices, or extended reality devices. This embodiment uses a loudspeaker unit as an example for illustration.

[0030] The technical solution of this invention involves providing side magnets 131 on both sides of the central magnetic circuit 12 along its minor axis, so that the two side magnets 131, the central magnetic circuit 12, and the magnetic yoke 11 form a magnetic circuit on both sides of the minor axis of the voice coil 23, ensuring that the magnetic gap 14 has a relatively sufficient magnetic induction intensity. Furthermore, by adding a long-side magnetically conductive part 1321 to the side of each side magnet 131 away from the magnetic yoke 11, the long-side magnetically conductive part 1321 guides the magnetic field lines overflowing from the side magnet 131, thereby allowing more magnetic field lines to enter the magnetic gap 14, increasing the magnetic induction intensity of the magnetic gap 14, and thus improving the acoustic performance of the sound-generating device 100.

[0031] Furthermore, this embodiment also includes two short-side magnetically conductive portions 1322, each including a magnetically conductive body 1323 and an extension 1324. One end of each of the two long-side magnetically conductive portions 1321 is connected to both ends of one magnetically conductive body 1323, and the other end of each long-side magnetically conductive portion 1321 is connected to both ends of the other magnetically conductive body 1323. The extension 1324 is located on the side of the magnetically conductive body 1323 facing the guide yoke 11, and extends in the direction of the guide yoke 11. The extension 1324 increases the conductivity of the side magnetically conductive plate 132. The magnetic properties allow the central magnetic circuit 12, the magnetic yoke 11, and the short-side magnetic guide portion 1322 to form magnetic loops on both sides of the voice coil 23 along the long axis of the central magnetic circuit 12. Compared to the magnetic circuit system 1 without the short-side magnetic guide portion 1322, this embodiment adds the short-side magnetic guide portion 1322, especially by providing an extension portion 1324 extending towards the magnetic yoke 11 on the side of the magnetic guide portion body 1323 facing the magnetic guide yoke 11. This increases the magnetic induction intensity of the magnetic gap 14 and thus improves the acoustic performance of the sound-generating device 100. Compared to the structure where a side magnet is provided on the short side of the magnetic circuit system 1, this embodiment further reduces the size of the magnetic circuit system 1, facilitating the miniaturization design of the sound-generating device 100.

[0032] Furthermore, in this embodiment, the central magnetic circuit 12 and the magnetic yoke 11 are penetrated through the mounting hole 15, thereby freeing up space for the installation of the conductive support 3. One end of the centering support 21 is electrically connected to the wire of the voice coil 23, and the other end of the centering support 21 is electrically connected to the conductive support 3. The conductive support 3 is also electrically connected to an external power source, thereby realizing the electrical connection between the voice coil 23 and the external power source. Since the conductive support 3 is set inside the mounting hole 15, the wire of the voice coil 23 extends inward and is electrically connected to the centering support 21. Compared with the existing configuration where the lead wire of the voice coil 23 extends outward and then runs around the periphery of the voice coil 23, the lead wire of the voice coil 23 in this embodiment extends inward, so the wire running does not occupy the space outside the voice coil 23. This allows the space that originally needed to avoid the wire running of the voice coil 23 to be effectively utilized. This space can be used to make the voice coil 23 and the magnet larger, thereby significantly improving the acoustic performance of the sound-generating device 100.

[0033] In addition, one end of the centering support 21 is electrically connected to the conductive support 3, and the other end of the centering support 21 is connected to the diaphragm 22. The diaphragm 22 is connected to the voice coil 23. The setting of the centering support 21 also effectively improves the centering effect of the voice coil 23, making the voice coil 23 less prone to polarization during vibration, thus ensuring the sound production effect of the sound generating device 100.

[0034] It should be noted that the voice coil 23 is used to drive the diaphragm 22 to vibrate in a first direction, which is... Figure 1 As shown in the vertical direction, the major axis of the central magnetic circuit 12 is... Figure 1 The front-to-back direction shown is such that the minor axis direction of the central magnetic circuit 12 is... Figure 1 The left and right directions are shown; the major axis direction of the central magnetic circuit 12, and the minor axis direction of the central magnetic circuit 12 are perpendicular to the first direction; the minor axis direction of the central magnetic circuit 12 is the width direction of the central magnetic circuit 12, and the major axis direction of the central magnetic circuit 12 is the length direction of the central magnetic circuit 12. If the central magnetic circuit 12 is approximately square, then the major axis direction and the minor axis direction of the central magnetic circuit 12 refer to the extension directions of two adjacent sides of the central magnetic circuit 12, respectively; if the central magnetic circuit 12 is racetrack-shaped, then the major axis direction of the central magnetic circuit 12 is the major axis direction of the racetrack, and the minor axis direction of the central magnetic circuit 12 is the minor axis direction of the racetrack. The shape of the central magnetic circuit 12 is not limited here. The long side magnetic conductive part 1321 extends along the major axis direction of the central magnetic circuit 12. The shape of the voice coil 23 can be square, elliptical, or other shapes, which are not limited here.

[0035] It should also be noted that the mounting hole 15 passes through the center of the central magnetic circuit 12. Since the magnetic field utilization rate at the center of the central magnetic circuit 12 is low, placing the mounting hole 15 at this position has little impact on the magnetic field strength of the magnetic gap 14. The conductive support 3 is placed inside the mounting hole 15, thus completing the installation of the conductive support 3 without affecting the overall size of the sound-generating device 100. The centering support 21 is also located inside the mounting hole 15. Compared with the case where the centering support 21 is placed on the outer periphery of the voice coil 23, in this embodiment, it is not necessary to reserve installation space for the centering support 21 on the outer periphery of the voice coil 23, nor is it necessary to reserve space on the outer periphery of the voice coil 23 to avoid the centering support 21. This space can be utilized to make the volume of the voice coil 23 and the magnetic circuit system 1 larger, significantly improving the magnetic induction intensity of the magnetic gap 14. The improvement is greater than the impact of placing the mounting hole 15 at the center of the central magnetic circuit 12 on the magnetic gap 14, thus improving the performance of the sound-generating device 100.

[0036] Furthermore, due to severe magnetic leakage at the center of the central magnetic circuit 12, the mounting hole 15 needs to be formed by removing at least a portion of the central magnet 121 at the center of the central magnetic circuit 12. This reduces the magnetic leakage of the central magnet 121. When the sound-generating device 100 is assembled with an electronic device, the impact of magnetic leakage of the central magnet 121 on the performance of the electronic device can be reduced, thus meeting the electronic device's requirements for magnetic leakage. The shape of the mounting hole 15 can be circular or square, and is not limited here.

[0037] Please see Figure 3 , Figure 4 and Figure 6 In one embodiment, the conductive support 3 includes an insulating body 31 and a conductive insert 32 disposed on the insulating body 31. The insulating body 31 is connected to the magnetic yoke 11. The conductive insert 32 includes a first conductive portion 321 and a second conductive portion 322 exposed on both sides of the insulating body 31 along a first direction. The first conductive portion 321 and the second conductive portion 322 are electrically connected. The first conductive portion 321 is disposed towards the centering support plate 21 and is electrically connected to the centering support plate 21. The second conductive portion 322 is used for electrical connection to an external power source. The first conductive portion 321 is electrically connected to the centering support plate 21, and the centering support plate 21 is electrically connected to the wire of the voice coil 23. The second conductive portion 322 is electrically connected to the external power source and is also electrically connected to the first conductive portion 321, so that the voice coil 23 can be connected and energized by the external power source. The first conductive part 321 may be directly connected to the second conductive part 322, or the first conductive part 321 may be electrically connected to the second conductive part 322 through a conductive or other conductor, and there is no limitation on this.

[0038] Please see Figures 4 to 6According to one embodiment of the present invention, the conductive insert 32 includes two parts, each including two first conductive portions 321 and two second conductive portions 322. The first conductive portions 321 and the second conductive portions 322 are electrically connected through a third conductive portion 323. The portions of the two first conductive portions 321 exposed on the surface of the insulating body 31 form two first conductive pads 3211, and the portions of the two second conductive portions 322 exposed on the surface of the insulating body 31 form two second conductive pads 3221. The two first conductive pads 3211 are electrically connected to the centering support piece 33 and provide support points for the centering support piece 33. Two conductive pads 3221 are electrically connected to an external power source; two first pads 2111 are provided on the first fixing part 211, and the two first pads 2111 correspond one-to-one with the two first conductive pads 3211 and are electrically connected; two second pads 2121 are provided on the second fixing part 212, and the two second pads 2121 are electrically connected to the two leads of the voice coil 23; the first pads 2111 and the second pads 2121 are provided one-to-one and the first pads 2111 and the second pads 2121 are electrically connected; the first pads 2111 and the second pads 2121 can be electrically connected through pre-embedded wires.

[0039] Please see Figures 4 to 6 In one embodiment, the conductive insert 32 further includes a third conductive portion 323, which is embedded within the insulating body 31. One end of the third conductive portion 323 is connected to the first conductive portion 321, and the other end is connected to the second conductive portion 322. By embedding the third conductive portion 323 within the insulating body 31, the first conductive portion 321 does not need to be directly electrically connected to the second conductive portion 322 via external wiring. Instead, the electrical connection between the first conductive portion 321 and the second conductive portion 322 can be achieved through the third conductive portion 323 embedded within the insulating body 31, making it safer and more reliable. It should be noted that the first conductive portion 321, the second conductive portion 322, and the third conductive portion 323 can be silver conductive portions or copper conductive portions, and there is no limitation herein. The insulating body 31 can be a rubber body or a Teflon body, etc., and there is no limitation herein.

[0040] Please see Figures 4 to 6 In one embodiment, the insulating body 31 and the magnetic yoke 11 are integrally injection molded parts. The insulating body 31 is injection molded onto the magnetic yoke 11, so that the insulating body 31 and the magnetic yoke 11 form a whole and are assembled as a structural component, thereby simplifying the assembly process and improving the assembly efficiency and production efficiency of the sound generating device 100.

[0041] Please see Figure 4 and Figure 6In one embodiment, the mounting hole 15 has a clearance space to avoid the centering support piece 21; wherein, the mounting hole 15 not only accommodates the centering support piece 21, but also has a clearance space to avoid interference with the centering support piece 21.

[0042] Please see Figure 2 In one embodiment, a wiring groove 111 is provided at one end of the magnetic yoke 11 away from the diaphragm 22. One end of the wiring groove 111 is connected to the mounting hole 15, and the other end of the wiring groove 111 extends to and passes through the outer edge of the magnetic yoke 11.

[0043] The inventors discovered that, due to the fact that the existing centering support plate 21 is generally located outside the voice coil 23, one end of the centering support plate 21 is electrically connected to the voice coil 23, and the other end of the centering support plate 21 is located at the edge of the housing 4 and exposed. The exposed part needs to be connected to the flexible circuit board. At this time, the flexible circuit board can only be set on the outer periphery of the sound generating device 100, occupying the space around the sound generating device 100. As a result, the entire component occupies a large space in the electronic device, which gradually makes it difficult to meet the user's needs.

[0044] In this embodiment, a wiring groove 111 is formed at the end of the magnetic yoke 11 away from the diaphragm 22. One end of the wiring groove 111 is connected to the mounting hole 15, and the other end of the wiring groove 111 extends through the edge of the square magnetic yoke 11. This allows the wiring groove 111 to accommodate a flexible circuit board, eliminating the need for the flexible circuit board to occupy the space around the outer casing 4, thus reducing the space occupied by the sound-generating device 100 and the flexible circuit board in the electronic device. The wiring groove 111 not only accommodates the flexible circuit board but also facilitates wiring, making it easy for the flexible circuit board to be electrically connected to an external power source. It should be noted that the number of wiring grooves 111 can be two or more, without limitation. If there are two wiring grooves 111, their extension directions can be the same or different, without limitation. If the extension directions of the two wiring grooves 111 are perpendicular to each other, then the extension directions of the two wiring grooves 111 are perpendicular to the first direction to meet the wiring requirements in different directions.

[0045] Please see Figure 2 and Figure 5According to one embodiment of the present invention, a groove 311 is formed on the side of the insulating body 31 away from the diaphragm 22. The second conductive part 322 is embedded in the bottom of the groove 311 and exposed. The groove 311 communicates with the wiring groove 111, thereby facilitating the electrical connection between the flexible circuit board and the second conductive part 322 through the wiring groove 111 and the groove 311. This allows the connection between the second conductive part 322 and the flexible circuit board to be accommodated in the groove 311 without occupying additional space in the electronic device. In simple terms, if the original sound-generating device 100 is to be connected to the flexible circuit board, the electronic device would need to provide a larger volume than the sound-generating device 100. The large space is used for the connection between the sound-generating device 100 and the flexible circuit board. In this embodiment, the flexible circuit board is accommodated by the wiring groove 111, and the connection between the flexible circuit board and the second conductive part 322 is accommodated by the groove 311. This allows more flexible circuit boards to be accommodated in the space originally occupied by the sound-generating device 100, or in other words, more flexible circuit boards to be accommodated, and the connection between the flexible circuit board and the second conductive part 322 to be accommodated. This effectively reduces the space occupied by the sound-generating device 100 and the flexible circuit board in the electronic device, thus better adapting to the trend of miniaturization of electronic devices.

[0046] Please see Figure 10 and Figure 11 In one embodiment, the centering support 21 includes a first fixing part 211, a cantilever part 213, a bending part 214, and a second fixing part 212 connected in sequence. The first fixing part 211 is electrically connected to the first conductive part 321. The bending part 214 extends along a first direction. One side of the second fixing part 212 is connected to the diaphragm 22, and the other side of the second fixing part 212 can also be electrically connected to the lead wire of the voice coil 23. The first fixing part 211 is connected to the first conductive part 321, the cantilever part 213 ensures the deformation capability of the centering support 21, and the bending part 214 bends upward to ensure connection with the second fixing part 212. The upper part of the second fixing part 212 is connected to the diaphragm 22, and the lower part of the second fixing part 212 is provided with a second solder pad 2121, which is electrically connected to the wire of the voice coil 23 to ensure that the voice coil 23 can be electrically connected to an external power source. The cantilever portion 213 includes at least one bent section 1326, thereby ensuring the elastic deformation capability of the centering support 21.

[0047] Please see Figure 10 and Figure 11According to one embodiment of the present invention, there are multiple cantilever portions 213, bending portions 214, and second fixing portions 212. The number of cantilever portions 213, bending portions 214, and second fixing portions 212 are the same and they are arranged in a one-to-one correspondence. Multiple cantilever portions 213 are arranged sequentially at intervals along the circumference of the first fixing portion 211. Alternatively, there may be two cantilever portions 213, bending portions 214, and second fixing portions 212. The two cantilever portions 213 are arranged opposite each other at both ends of the first fixing portion 211 along the major axis or minor axis direction of the magnetic circuit system 1, which differs from conventional arrangements. Unlike the centering supports 21 at the four corners of the voice coil 23, in this embodiment, two cantilever portions 213 are disposed opposite each other at both ends of the first fixed portion 211 along the long axis of the magnetic circuit system 1. The cantilever portions 213 extend along the long axis of the magnetic circuit system 1, and the magnetic circuit system 1 has more space in the long axis direction than in the short axis direction, so that the length of the cantilever portions 213 can be made longer than that of the traditional centering supports 21, thereby giving the centering supports 21 a better centering effect and making the voice coil 23 less prone to polarization during vibration. The centering supports 21 are integrally molded parts, which facilitates assembly.

[0048] Please see Figure 7 and Figure 8 In one embodiment, the voice coil 23 includes a square voice coil 23, and the extension 1324 includes a connecting section 1325 and bent sections 1326 disposed at both ends of the connecting section 1325. The connecting section 1325 corresponds to the short axis side of the square voice coil 23, and the bent sections 1326 correspond to the two corners at both ends of the short axis side. By providing the connecting section 1325 to correspond to the short axis side of the square voice coil 23, and by providing the bent sections 1326 to correspond to the corners of the square voice coil 23, the shape of the extension 1324 can be adapted to the voice coil 23, thereby allowing more magnetic field lines overflowing from the extension 1324 to pass through the voice coil 23, increasing the driving force of the voice coil 23, and improving the acoustic performance of the sound-generating device 100.

[0049] Please see Figures 4 to 6 In one embodiment, the sound-generating device 100 further includes a housing 4, one end of which is connected to the magnetic yoke 11, and the other end of which is connected to the outer edge of the diaphragm 22. The side magnetic plate 132 and the housing 4 are integrally injection molded parts. By integrally injection molding the side magnetic plate 132 and the housing 4, the side magnetic plate 132 and the housing 4 form a single structural component, which facilitates the assembly of the sound-generating device 100, simplifies the assembly process of the sound-generating device 100, and improves the assembly efficiency and production efficiency of the sound-generating device 100.

[0050] Please see Figure 1 and Figure 3In one embodiment, the diaphragm 22 includes a folded ring 223, a first diaphragm 221, and a second diaphragm 222. The outer edge of the folded ring 223 is connected to the outer shell 4. The folded ring 223 is spaced apart from the magnetic circuit system 1. A first through hole 2231 is formed around the center of the folded ring 223. The first diaphragm 221 is disposed corresponding to the first through hole 2231 and is connected to the folded ring 223. A centering support 21 is connected to the first diaphragm 221. A second through hole 2212 is provided in the center of the first diaphragm 221. The second diaphragm 222 covers the second through hole 2212 and is connected to the first diaphragm 221. The voice coil 23 is connected to the folded ring 223 or the first diaphragm 221. The outer edge of the folded ring 223 is connected to the outer shell 4, and a first through hole 2231 is formed on the inner side of the folded ring 223. The outer edge of the first vibrating plate 221 is connected to the folded ring 223 and is set corresponding to the first through hole 2231. The side of the first vibrating plate 221 facing the magnetic circuit system 1 is connected to the second fixing part 212 to improve the stability of vibration. A second through hole 2212 is set at the center of the first vibrating plate 221. The second vibrating plate 222 is set corresponding to the second through hole 2212. The second vibrating plate 222 is connected to the first vibrating plate 221 and covers the second through hole 2212 to ensure the vibration performance of the diaphragm 22.

[0051] Please see Figures 4 to 6 In one embodiment, the outer shell 4, the diaphragm 22, and the magnetic yoke 11 form a cavity for accommodating the magnetic circuit system 1 and the voice coil 23. The outer shell 4 has a connecting hole 41 that communicates with the cavity. The sound-generating device 100 also includes a mesh fabric 5, which covers the connecting hole 41. The mesh fabric 5 and the outer shell 4 are integrally injection-molded parts. By injection-molding the mesh fabric 5 onto the outer shell 4, the mesh fabric 5 and the outer shell 4 form a single structural component, thereby facilitating the assembly of the sound-generating device 100, simplifying the assembly process, and improving the assembly efficiency and production efficiency of the sound-generating device 100.

[0052] In this embodiment, a mesh fabric 5 is injection molded onto the outer shell 4 to intercept the sound-absorbing powder from entering the outer shell 4. The mesh fabric 5 and the extension 1324 are spaced apart to form an airflow channel connecting the internal cavity of the outer shell 4, so that the internal cavity of the outer shell 4 can be connected to the external environment through the mesh fabric 5, which meets the requirement of complete filling of the generating device. Compared with the traditional process of setting a steel mesh on the outside of the outer shell 4 and the magnetic yoke 11 to intercept the sound-absorbing powder from entering the outer shell 4, the technical solution of this embodiment integrally injection molds the mesh fabric 5 and the outer shell 4, which is less expensive.

[0053] It should be noted that there can be multiple connecting holes 41. Multiple connecting holes 41 set on the same side can share a mesh fabric 5, that is, multiple connecting holes 41 located on one side of the central magnetic circuit 12 can share a mesh fabric 5, and multiple connecting holes 41 located on the other side of the central magnetic circuit 12 can share another mesh fabric 5. Alternatively, there can be multiple mesh fabrics 5, and the number of connecting holes 41 and mesh fabrics 5 can be the same and set in a one-to-one correspondence. There is no restriction here.

[0054] Please see Figure 1 , Figure 2 and Figure 8 According to one embodiment of the present invention, the outer shell 4 is provided with exposure holes 42 on both sides along the short axis direction of the central magnetic circuit 12, and the side magnet 131 extends into the exposure hole 42 on the side away from the central magnetic circuit 12, thereby increasing the volume of the side magnet 131 and improving the acoustic performance of the sound generating device 100.

[0055] Please see Figure 8 In one embodiment, the edge of the magnetic conductive part body 1323 facing the voice coil 23 is bent and extended toward the magnetic yoke 11 to form an extension 1324; wherein the edge of the magnetic conductive part body 1323 facing the voice coil 23 is bent and extended toward the magnetic yoke 11 to form the extension 1324, so that the extension 1324 is closer to the voice coil 23, so that the magnetic field lines overflowing from the extension 1324 can be cut more by the voice coil 23, thereby increasing the driving force of the voice coil 23 and improving the acoustic performance of the sound generating device 100.

[0056] Please see Figure 8 In one embodiment, the short-side magnetic conductive portion 1322 and the long-side magnetic conductive portion 1321 are integrally molded parts. Since the short-side magnetic conductive portion 1322 and the long-side magnetic conductive portion 1321 are integrally molded parts, the magnetic conductive plate 132 can participate in the injection molding as a structural component when injection molding with the outer shell 4, making the injection molding process easier and the operation simpler.

[0057] Please see Figures 3 to 5 In one embodiment, the portion of the first vibrating plate 221 near the second through hole 2212 is provided with a boss 2211 extending towards the centering support plate 21. The boss 2211 is connected to the side of the centering support plate 21 away from the conductive support 3. The boss 2211 is connected to the cantilever portion 213, increasing the contact area between the centering support plate 21 and the diaphragm 22, improving the stability of the connection between the centering support plate 21 and the diaphragm 22, and enhancing the consistency of vibration among the components of the vibration system 2.

[0058] Please see Figure 5In one embodiment, the central magnetic circuit 12 includes a central magnetic guide plate 122 and a central magnet 121 stacked together. The side of the central magnet 121 away from the central magnetic guide plate 122 is connected to the magnetic yoke 11. The side of the central magnetic guide plate 122 away from the central magnet 121 is provided with a first clearance groove 1221 for avoiding the voice coil 23 wire. By providing the central magnetic guide plate 122 on the side of the central magnet 121 away from the magnetic yoke 11, the central magnetic guide plate 122 corrects the magnetic field lines, enhances the magnetic induction intensity of the magnetic gap 14, and improves the acoustic performance of the sound generating device 100.

[0059] Please see Figure 9 In one embodiment, a second clearance groove 1222 for avoiding the diaphragm 22 is provided on the side of the central magnetic plate 122 away from the central magnet 121. The second clearance groove 1222 for avoiding the first vibrating plate 221 is formed on the side of the central magnetic plate 122 away from the central magnet 121. The second clearance groove 1222 communicates with the first clearance groove 1221. Both the first clearance groove 1221 and the second clearance groove 1222 communicate with the mounting hole 15.

[0060] The present invention also proposes an electronic device, which includes the sound-generating device 100 described above. The specific structure of the sound-generating device 100 is as described in the above embodiments. Since this electronic device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0061] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A sound-generating device, characterized in that, include: A magnetic circuit system, the magnetic circuit system including a magnetic yoke, a central magnetic circuit and a side magnetic circuit disposed on the magnetic yoke, the side magnetic circuit being located around the central magnetic circuit and being spaced apart from the central magnetic circuit to form a magnetic gap; The side magnetic circuit includes two side magnets respectively disposed on both sides of the central magnetic circuit along the minor axis direction of the central magnetic circuit, and a side magnetic guide plate surrounding the central magnetic circuit; the side magnetic guide plate includes two long side magnetic guide portions arranged along the minor axis direction of the central magnetic circuit and two short side magnetic guide portions arranged along the major axis direction of the central magnetic circuit, the two long side magnetic guide portions being respectively connected to the ends of the two side magnets away from the magnetic guide yoke; each short side magnetic guide portion includes a magnetic guide portion body and an extension portion disposed on the side of the magnetic guide portion body facing the magnetic guide yoke, the extension portion extending towards the magnetic guide yoke; A vibration system, comprising a centering support, a diaphragm, and a voice coil connected to the diaphragm and driving the diaphragm to vibrate along a first direction, wherein the voice coil is configured corresponding to the magnetic gap; The conductive support has a mounting hole through the central magnetic circuit and the magnetic yoke in the magnetic circuit system, and the conductive support is embedded in the mounting hole; one end of the centering support is electrically connected to the conductive support, and the other end of the centering support is connected to the diaphragm 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 conductive support includes an insulating body and a conductive insert disposed on the insulating body. The insulating body is connected to the magnetic yoke. The conductive insert includes a first conductive portion and a second conductive portion exposed on both sides of the insulating body along the first direction. The first conductive portion is electrically connected to the second conductive portion. The first conductive portion is disposed toward the centering support piece and is electrically connected to the centering support piece. The second conductive portion is used to be electrically connected to an external power source.

3. The sound-generating device as described in claim 2, characterized in that, The conductive insert further includes a third conductive portion, which is embedded in the insulating body. One end of the third conductive portion is connected to the first conductive portion, and the other end of the third conductive portion is connected to the second conductive portion. And / or, the insulating body and the magnetic yoke are integrally injection molded parts.

4. The sound-generating device as described in claim 1, characterized in that, The mounting hole has clearance space to avoid the centering support piece; And / or, a wiring groove is provided at one end of the magnetic yoke away from the diaphragm, one end of the wiring groove is connected to the mounting hole, and the other end of the wiring groove extends toward the outer edge of the magnetic yoke and penetrates the outer edge of the magnetic yoke.

5. The sound-generating device as described in claim 2, characterized in that, The centering support includes a first fixing part, a cantilever part, a bending part, and a second fixing part connected in sequence. The first fixing part is electrically connected to the first conductive part. The bending part extends along the first direction. One side of the second fixing part is connected to the diaphragm, and the other side of the second fixing part can also be electrically connected to the lead wire of the voice coil.

6. The sound-generating device as claimed in claim 1, characterized in that, The voice coil includes a square voice coil, and the extension includes a connecting section and bent sections disposed at both ends of the connecting section. The connecting section corresponds to the short axis side of the square voice coil, and the bent sections correspond to the two corners at both ends of the short axis side.

7. The sound-generating device as described in any one of claims 1 to 6, characterized in that, The sound-generating device also includes a housing, one end of which is connected to the magnetic yoke, and the other end of which is connected to the outer edge of the diaphragm. The side magnetic plate and the housing are integrally injection molded parts.

8. The sound-generating device as claimed in claim 7, characterized in that, The diaphragm includes a folded ring, a first diaphragm plate, and a second diaphragm plate. The outer edge of the folded ring is connected to the outer shell. The folded ring is spaced apart from the magnetic circuit system. A first through hole is formed around the center of the folded ring. The first diaphragm plate is disposed corresponding to the first through hole and is connected to the folded ring. The centering support plate is connected to the first diaphragm plate. A second through hole is provided in the center of the first diaphragm plate. The second diaphragm plate covers the second through hole and is connected to the first diaphragm plate. The voice coil is connected to the folded ring or the first diaphragm plate.

9. The sound-generating device as described in claim 8, characterized in that, The first vibrating plate has a boss extending toward the centering support plate near the second through hole. The boss is connected to the side of the centering support plate away from the conductive support.

10. The sound-generating device according to any one of claims 1 to 6, characterized in that, The central magnetic circuit includes a central magnetic guide plate and a central magnet stacked together, with the side of the central magnet away from the central magnetic guide plate connected to the magnetic guide yoke; The central magnetic plate is provided with a first clearance groove on the side away from the central magnet to avoid the wire of the voice coil; And / or, the central magnetic plate is provided with a second clearance groove on the side away from the central magnet to avoid the diaphragm.

11. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 10.

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