Sound production monomer and electronic equipment

Abstract

The invention discloses a sound production monomer and electronic equipment, and relates to the technical field of electro-acoustic transformation.The sound production monomer comprises a shell, a magnetic circuit system and a vibration system, the magnetic circuit system is connected with the shell, the magnetic circuit system comprises a center magnet and side magnets, the side magnets are arranged outside the center magnet in a surrounding mode, and a magnetic gap is defined between the side magnets and the center magnet; two avoiding gaps communicated with the magnetic gap are formed by the side magnets, the two avoiding gaps are arranged corresponding to two opposite corners of the center magnet respectively, and the other corners of the center magnet are shielded by the side magnets; the vibration system comprises a voice coil and two centering disk chips, one end of the voice coil is arranged corresponding to the magnetic gap, and the two centering disk chips are located in the two avoiding gaps respectively. According to the invention, the installation space of the air flow channel and the centering disk is provided through the avoiding gap, and the edge magnet shields the corner to increase the BL value, so that the volume of the sound production monomer is reduced, the air permeability requirement of the sound production monomer is met, the BL value of the sound production monomer is improved, and the sensitivity of the sound production monomer is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electroacoustic conversion, and in particular to a sound-generating unit and an electronic device. Background Art

[0002] Due to the miniaturization and thinness of electronic devices such as mobile phones and tablets, the installation space reserved for the sound unit is getting smaller and smaller, but at the same time, the demand for the sensitivity of the sound unit is also increasing. Therefore, how to improve the sensitivity of the sound unit under the constraints of product structure and size becomes the key.

[0003] The sound unit in the prior art usually forms a magnetic gap through an annular side magnet or a segmented side magnet. Although the annular side magnet greatly improves the sensitivity, it has insufficient air permeability and poor airflow, which affects the acoustic performance. It also causes structures such as centering supports to be set on the top of the side magnet, resulting in the occupation of longitudinal space and increasing the volume of the sound unit. The segmented side magnet has no magnet and washer design at the corner corresponding to the center magnet, resulting in a low B value at the corner, which in turn causes a small BL value of the overall sound unit and low sensitivity of the sound unit. Summary of the invention

[0004] The main purpose of the present invention is to provide a sound-emitting unit and an electronic device, aiming to solve the problems in the prior art that the sound-emitting unit is large in size and insufficient in air permeability when annular side magnets are used, and has low sensitivity when segmented side magnets are used.

[0005] To achieve the above object, the sound-emitting unit proposed in the present invention comprises:

[0006] shell;

[0007] A magnetic circuit system, the magnetic circuit system is connected to the housing, the magnetic circuit system includes a central magnet and side magnets, the side magnets are arranged outside the central magnet and form a magnetic gap with the central magnet; the side magnets form two avoidance gaps connected to the magnetic gap, the two avoidance gaps are respectively arranged corresponding to two opposite corners of the central magnet, and the side magnets cover the remaining corners of the central magnet;

[0008] A vibration system, the vibration system includes a voice coil and two centering supports, one end of the voice coil is arranged corresponding to the magnetic gap, the two centering supports are respectively located in the two avoidance gaps, one end of each centering support is connected to the voice coil, and the other end is connected to the shell.

[0009] In one embodiment, the center magnet includes two first edges arranged opposite to each other along a first direction and two second edges arranged opposite to each other along a second direction, and the two ends of each of the first edges are respectively connected to the two second edges to form two corners; the two corners are respectively a first corner and a second corner; the number of the side magnets is two, and the two side magnets extend from the first edge toward an adjacent second edge and block the first corner, and the two side magnets form the avoidance gap corresponding to the second corner.

[0010] In one embodiment, the edge magnet includes a first section and a second section, the first section extends along the first edge, the second section extends along the second edge, one end of the first section is connected to the corresponding second section and the connection point is arranged corresponding to the first corner, and the other end of the first section and the other second section corresponding to the second corner form the avoidance gap.

[0011] In one embodiment, the first section and the second section are both arranged in parallel with the central magnet, and the first section and the second section are smoothly connected toward one side of the central magnet to form the magnetic gap with uniform intervals with the central magnet.

[0012] In one embodiment, an avoidance zone is formed on the outer side of each of the side magnets corresponding to the first corner, the sound-emitting unit also includes a steel mesh, and the steel mesh protrudes toward the magnetic circuit system corresponding to the avoidance zone and the avoidance gap to form a baffle, and each of the baffles is provided with a through hole.

[0013] In one embodiment, the steel mesh includes a panel, the baffle is formed on the outer periphery of the panel, a mounting hole is opened on the panel, the magnetic circuit system also includes a magnetic yoke, the magnetic yoke is embedded in the mounting hole, and the center magnet and the side magnets are both supported on the magnetic yoke.

[0014] In one embodiment, the first section and the second section are smoothly connected at a side away from the central magnet to form an R angle; or, the first section and the second section are connected at a side away from the central magnet through a beveled surface to form a C angle.

[0015] In one embodiment, the center magnet is a rectangular magnet, the long side of the rectangular magnet forms the first side, the short side of the rectangular magnet forms the second side, and each of the side magnets is an L-shaped magnet.

[0016] In one embodiment, two corners on the same side of the outer shell corresponding to the central magnet are provided with embedding grooves, and a first welding pad and a second welding pad which are conductive to each other are respectively arranged in the two embedding grooves, the first welding pad is conductive to one of the centering support plates, and the second welding pad is arranged on the same side as the other centering support plate and both are conductive to the external circuit.

[0017] In one embodiment, the housing is a non-conductive housing, the first pad and the second pad are both conductive pads, and the first pad and the second pad are electrically connected via a conductive connecting rod.

[0018] In one embodiment, the shell is an injection molded shell, the first pad and the second pad are both metal pads, the conductive connecting rod is a metal connecting rod, and the first pad, the second pad, the conductive connecting rod and the shell are integrally injection molded.

[0019] In one embodiment, the housing is a conductive housing, the first pad and the second pad are both conductive pads, and the first pad and the second pad are conductively connected via an external conductive member.

[0020] The present invention further provides an electronic device, comprising a protective shell and the above-mentioned sound-emitting unit, wherein the sound-emitting unit is installed in the protective shell.

[0021] The technical solution of the present invention forms two avoidance gaps on the side magnets, and sets the avoidance gaps corresponding to the two corners of the center magnet, so that the avoidance gap has the least effect on the magnetic circuit system and reduces the effect on the BL value. The side magnets then cover the remaining corners of the center magnet, so that the corners can also have magnets, increase the B value here, and thus increase the BL value of the entire sounding unit, and improve the sound sensitivity of the sounding unit; at the same time, the present invention allows the centering support plate to extend into the avoidance gap and connect with the voice coil through the design of the avoidance gap, and does not occupy the longitudinal space, so that the overall volume of the sounding unit is reduced, and the avoidance gap provides an airflow channel, which improves the smoothness of the airflow of the sounding unit, thereby improving the acoustic performance of the sounding unit. The present invention provides an airflow channel and an installation space for the centering support plate through the avoidance gap, and the side magnets cover the corners to increase the BL value, thereby reducing the volume of the sounding unit, meeting the air permeability requirements of the sounding unit, and improving the BL value of the sounding unit, thereby improving the sound sensitivity of the sounding unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the explosion structure of the sound-generating unit provided by the present invention;

[0024] Figure 2A schematic cross-sectional view of the sound-emitting unit provided by the present invention;

[0025] Figure 3 A schematic diagram of the structure of the magnetic circuit system, centering support plate and shell of the sound-generating unit provided by the present invention;

[0026] Figure 4 A schematic diagram of the structure of the housing of the sound-emitting unit provided by the present invention;

[0027] Figure 5 A schematic structural diagram of the magnetic circuit system of the sound-generating unit provided by the present invention.

[0028] Description of Figure Numbers:

[0029] 100. Sound unit; 1. Shell; 11. Embedded groove; 12. First solder pad; 13. Second solder pad; 14. Conductive connecting rod; 2. Magnetic circuit system; 21. Center magnet; 211. Corner; 212. First corner; 213. Second corner; 214. First side; 215. Second side; 22. Side magnet; 221. First section; 222. Second section; 223. Avoidance zone; 23. Magnetic gap; 24. Avoidance gap; 25. Magnetic yoke; 26. Washer; 3. Vibration system; 31. Voice coil; 32. Centering support plate; 33. Diaphragm; 4. Steel mesh; 41. Panel; 42. Baffle; 43. Through hole.

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] The present invention provides a sound-emitting unit 100. Figure 1 , Figure 2 and Figure 5 The sound-emitting unit 100 of the present embodiment includes a shell 1, a magnetic circuit system 2 and a vibration system 3. The magnetic circuit system 2 is connected to the shell 1. The magnetic circuit system 2 includes a central magnet 21 and a side magnet 22. The side magnet 22 is arranged outside the central magnet 21 and forms a magnetic gap 23 with the central magnet 21. The side magnet 22 forms two avoidance gaps 24 connected to the magnetic gap 23. The two avoidance gaps 24 are respectively arranged corresponding to the two opposite corners 211 of the central magnet 21, and the side magnet 22 blocks the remaining corners 211 of the central magnet 21. The vibration system 3 includes a voice coil 31 and two centering supports 32. One end of the voice coil 31 is arranged corresponding to the magnetic gap 23. The two centering supports 32 are respectively located in the two avoidance gaps 24. One end of each centering support 32 is connected to the voice coil 31, and the other end is connected to the shell 1.

[0035] The technical solution of the present invention forms two avoidance gaps 24 on the side magnets 22, and the avoidance gaps 24 are arranged corresponding to the two corners 211 of the center magnet 21, so that the avoidance gaps 24 have the least effect on the magnetic circuit system 2, and reduce the effect on the BL value. The side magnets 22 shield the remaining corners 211 of the center magnet 21, so that the corners 211 can also have a magnet design, increase the B value here, thereby increasing the overall BL value of the sound unit 100 and improving the sound sensitivity of the sound unit 100. At the same time, the present invention designs the avoidance gap 24 so that the centering support plate 32 can extend into the avoidance gap 24 and connect with the voice coil 31, and will not occupy the longitudinal space, so that the overall volume of the sound unit 100 is reduced, and the avoidance gap 24 provides an air flow channel, which improves the air flow of the sound unit 100, thereby improving the acoustic performance of the sound unit 100. The present invention provides an air flow channel and an installation space for the centering support plate 32 by avoiding the gap 24. The side magnet 22 blocks the corner 211 to increase the BL value, thereby reducing the volume of the sound unit 100 and meeting the air permeability requirement of the sound unit 100. At the same time, it can also increase the BL value of the sound unit 100 and improve the sensitivity of the sound unit 100.

[0036] In one embodiment, the vibration system 3 also includes a diaphragm 33, the voice coil 31 is connected to the diaphragm 33, and the magnetic circuit system 2 also includes a washer 26, which is arranged on the side of the center magnet 21 and the side magnet 22 facing the diaphragm 33, and the shape of the washer 26 is adapted to the shape of the center magnet 21.

[0037] In one embodiment, the central magnet 21 includes two first sides 214 arranged oppositely along a first direction and two second sides 215 arranged oppositely along a second direction, and the two ends of each first side 214 are respectively connected to the two second sides 215 to form two corners 211; the two corners 211 are respectively the first corner 212 and the second corner 213; the number of the side magnets 22 is two, the two side magnets 22 extend from the first side 214 toward an adjacent second side 215 and block the first corner 212, and the two side magnets 22 form an avoidance gap 24 corresponding to the second corner 213. Specifically, the two first sides 214 and the two second sides 215 are respectively connected to form four corners, and the four corners include two first corners 212 and two second corners 213, wherein the two first corners 212 are arranged diagonally, the two second corners 213 are arranged diagonally, the side magnets extend to the first corner 212 to block the first corner 212, and the side magnets are not arranged at the second corner 213 to form an avoidance gap.

[0038] The first side 214 and the second side 215 of each side magnet 22 cover the periphery of the central magnet 21 except the two second corners 213 , thereby increasing the magnetic flux density in this area and reducing magnetic leakage, thereby increasing the BL value of the sound unit 100 and further increasing the sensitivity of the sound unit 100 .

[0039] In one embodiment, the edge magnet 22 includes a first section 221 and a second section 222, the first section 221 extends along the first edge 214, the second section 222 extends along the second edge 215, one end of the first section 221 is connected to the corresponding second section 222 and the connection point is set corresponding to the first corner 212, and the other end of the first section 221 and the other second section 222 corresponding to the second corner 213 form an avoidance gap 24.

[0040] It can be seen that the second corner 213 is located between the other end of the first section 221 and the other second section 222, so that the two second corners 213 are diagonally arranged, making the magnetic field distribution in the magnetic gap 23 more uniform, avoiding performance fluctuations of the voice coil 31 caused by uneven magnetic field distribution, thereby improving the stability and acoustic performance of the sound unit 100.

[0041] In one embodiment, the first section 221 and the second section 222 are both arranged parallel to the central magnet 21 , and the first section 221 and the second section 222 are smoothly connected toward one side of the central magnet 21 to form a uniformly spaced magnetic gap 23 with the central magnet 21 .

[0042] The magnetic gaps 23 are evenly spaced throughout the entire area, avoiding local magnetic field strength fluctuations caused by uneven gaps, so that the voice coil 31 is more evenly acted upon by the magnetic field in the magnetic gap 23, thereby making the voice coil 31 more stable during movement and avoiding nonlinear distortion caused by asymmetric force. The diaphragm vibration frequency response is more accurate, which helps to reduce distortion in sound output and further improve acoustic performance.

[0043] In one embodiment, the center magnet 21 is a rectangular magnet, the long side of the rectangular magnet forms the first side 214, the short side of the rectangular magnet forms the second side 215, and each side magnet 22 is an L-shaped magnet.

[0044] On the one hand, rectangular magnets are easy to process, reducing the difficulty and cost of processing complex shapes during the manufacturing process. On the other hand, rectangular magnets can provide uniform magnetic field distribution, so that the force on the voice coil 31 during vibration is more uniform, improving the stability of the voice coil 31 during the entire vibration stroke, thereby improving the acoustic performance of the sound unit 100. If the side magnet 22 is an L-shaped magnet, it can be ensured that the first section 221 and the second section 222 are arranged parallel to the first side 214 and the second side 215 respectively, so that the magnetic gap is more uniform, and the corner of the L-shaped magnet can block the first corner 212, providing a magnetic field for the first corner 212. L-shaped magnets are a commonly used type of magnets, so they are easier to obtain and can reduce costs.

[0045] In one embodiment, an avoidance area 223 is formed on the outer side of each side magnet 22 corresponding to the first corner 212, and the sound unit 100 also includes a steel mesh 4, and the steel mesh 4 protrudes toward the magnetic circuit system 2 corresponding to the avoidance area 223 and the avoidance gap 24 to form a baffle 42, and each baffle 42 is provided with a plurality of through holes 43 arranged in an array.

[0046] The side magnet 22 forms an avoidance area 223 at the first corner 212 of the center magnet 21, and forms an avoidance gap 24 at the second corner 213, so that the baffle 42 of the steel mesh 4 can extend into the avoidance area 223 or the avoidance gap 24, which can reduce the volume of the steel mesh 4 without occupying a larger lateral space, thereby reducing the overall volume of the sound unit 100. At the same time, the through hole 43 on the steel mesh 4 can provide a channel for airflow exchange, which helps to reduce the resistance of air flow, make the sound output clearer and more transparent, and improve the overall sound quality and acoustic performance of the sound unit 100.

[0047] In one embodiment, the steel mesh 4 includes a panel 41, a baffle 42 is formed on the periphery of the panel 41, a mounting hole is opened on the panel 41, and the magnetic circuit system 2 also includes a magnetic yoke 25, which is embedded in the mounting hole, and the center magnet 21 and the side magnet 22 are supported on the magnetic yoke 25. The magnetic yoke 25 is installed in the mounting hole, so that the magnetic yoke 25 and the panel 41 of the steel mesh 4 are located on the same plane, and the magnetic yoke 25 does not need to occupy additional longitudinal space, thereby reducing the overall volume of the sound unit 100.

[0048] In one embodiment, the first section 221 and the second section 222 are smoothly connected at one side away from the central magnet 21 to form an R angle; or, the first section 221 and the second section 222 are connected at one side away from the central magnet 21 through a beveled surface to form a C angle.

[0049] It should be noted that, when the length and width of the first section 221 and the second section 222 are similar or consistent, the side of the first section 221 and the second section 222 away from the center magnet 21 can be set to a C angle. The processing of the C angle is relatively simple, and only requires beveling to achieve it, with high processing efficiency and low processing cost. When the length and width difference between the first section 221 and the second section 222 is large, the side of the first section 221 and the second section 222 away from the center magnet 21 can be set to an R angle, thereby increasing the strength at the corner 211 and reducing stress concentration.

[0050] It can be understood that the C angle and the R angle are commonly used terms in the art, the C angle represents the corner 211 formed directly by the chamfered surface, and the R angle represents the corner 211 formed by the smooth transition of the arc surface.

[0051] Please combine Figure 3 and Figure 4 In one embodiment, an embedding groove 11 is opened at two corners 211 on the same side of the housing 1 corresponding to the central magnet 21, and a first welding pad 12 and a second welding pad 13 which are conductive to each other are respectively arranged in the two embedding grooves 11. The first welding pad 12 is conductive to one of the centering support pieces 32, and the second welding pad 13 is arranged on the same side as the other centering support piece 32 and both are conductive to the external circuit.

[0052] It can be understood that in the prior art, the voice coil 31 is usually powered by connecting the two centering supports 32 to an external circuit so that it vibrates in the magnetic gap 23. Therefore, it is necessary to set wires at the two centering supports 32 to connect to the external circuit. In the present invention, one of the centering supports 32 is connected to the other centering support 32 through the first soldering pad 12 and the second soldering pad 13, so that the second soldering pad 13 and the other centering support 32 are located on the same side, forming a path of another centering support 32-voice coil 31-one of the centering supports 32-first soldering pad 12-second soldering pad 13, so that the voice coil 31 can be powered by setting the wires on the same side, reducing the length of the wires, optimizing the layout in the sound unit 100, and further reducing the volume of the sound unit 100.

[0053] In one embodiment, the housing 1 is a non-conductive housing 1, the first pad 12 and the second pad 13 are both conductive pads, and the first pad 12 and the second pad 13 are connected via a conductive connecting rod 14. The non-conductive housing 1 effectively isolates the electrical part from the external environment, prevents the housing 1 from contacting a conductive object and causing a short circuit, improves the safety of the sound unit 100, and connects the two first pads 12 and the second pad 13 via the conductive connecting rod 14, reduces the complex layout of the internal wires, and optimizes the internal space layout of the sound unit 100.

[0054] In one embodiment, the housing 1 is an injection molded housing 1, the first pad 12 and the second pad 13 are both metal pads, the conductive connecting rod 14 is a metal connecting rod, and the first pad 12, the second pad 13, the conductive connecting rod 14 and the housing 1 are integrally injection molded. The integral injection molding ensures a firm connection between the first pad 12, the second pad 13, the conductive connecting rod 14 and the housing 1, avoids loosening or displacement problems that may be caused by vibration, impact or long-term use in traditional assembly methods, and improves stability.

[0055] In one embodiment, the housing 1 is made of a conductive material, the first pad 12 and the second pad 13 are both conductive pads, and the first pad 12 and the second pad 13 are connected through an external conductive member. The external conductive member can make the connection between the first pad 12 and the second pad 13 more flexible, make full use of the space in the sound unit, and thus reduce the volume of the sound unit 100. Specifically, the external conductive member can be an FPCB. The flexibility of the FPCB enables it to be flexibly arranged and can withstand certain bending and vibration, ensuring that the electrical connection between the pads is not affected by external impact or structural deformation.

[0056] The present invention also proposes an electronic device, which includes a protective shell and the above-mentioned sound-emitting unit 100, and the sound-emitting unit 100 is installed in the protective shell. Specifically, the sound-emitting unit 100 can be directly installed in the protective shell of the electronic device, or the sound-emitting unit 100 can be assembled into a sound module and then installed in the protective shell of the electronic device. The specific structure of the sound-emitting unit 100 refers to the above-mentioned embodiment. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0057] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A sound-emitting unit, characterized in that: include: shell; A magnetic circuit system, the magnetic circuit system is connected to the housing, the magnetic circuit system includes a central magnet and side magnets, the side magnets are arranged outside the central magnet and form a magnetic gap with the central magnet; the side magnets form two avoidance gaps connected to the magnetic gap, the two avoidance gaps are respectively arranged corresponding to two opposite corners of the central magnet, and the side magnets cover the remaining corners of the central magnet; A vibration system, the vibration system includes a voice coil and two centering supports, one end of the voice coil is arranged corresponding to the magnetic gap, the two centering supports are respectively located in the two avoidance gaps, one end of each centering support is connected to the voice coil, and the other end is connected to the shell.

2. The sound-emitting unit according to claim 1, characterized in that: The central magnet comprises two first sides arranged opposite to each other in a first direction and two second sides arranged opposite to each other in a second direction, and two ends of each first side are respectively connected to two second sides to form two corners; the two corners are respectively a first corner and a second corner; The number of the side magnets is two. The two side magnets extend from the first side toward an adjacent second side and block the first corner. The two side magnets form the avoidance gap corresponding to the second corner.

3. The sound-emitting unit according to claim 2, characterized in that: The edge magnet includes a first section and a second section, the first section extends along the first edge, the second section extends along the second edge, one end of the first section is connected to the corresponding second section and the connection is arranged corresponding to the first corner, and the other end of the first section and the other second section corresponding to the second corner form the avoidance gap.

4. The sound-emitting unit according to claim 3, characterized in that: The first section and the second section are both arranged in parallel with the central magnet, and the first section and the second section are smoothly connected toward one side of the central magnet to form the magnetic gap with uniform intervals with the central magnet.

5. The sound-emitting unit according to claim 3, characterized in that: An escape zone is formed on the outer side of each edge magnet corresponding to the first corner, and the sound-emitting unit also includes a steel mesh, and the steel mesh protrudes toward the magnetic circuit system corresponding to the escape zone and the escape gap to form a baffle, and each baffle is provided with a through hole.

6. The sound-emitting unit according to claim 5, characterized in that: The steel mesh includes a panel, the baffle is formed on the outer periphery of the panel, a mounting hole is opened on the panel, the magnetic circuit system also includes a magnetic yoke, the magnetic yoke is embedded in the mounting hole, and the center magnet and the side magnet are both supported on the magnetic yoke.

7. The sound-emitting unit according to claim 5, characterized in that: The first section and the second section are smoothly connected at a side away from the central magnet to form an R angle; or, the first section and the second section are connected at a side away from the central magnet through a beveled surface to form a C angle.

8. The sound-emitting unit according to claim 2, characterized in that: The central magnet is a rectangular magnet, the long side of the rectangular magnet forms the first side, the short side of the rectangular magnet forms the second side, and each of the side magnets is an L-shaped magnet.

9. The sound-emitting unit according to any one of claims 1 to 8, characterized in that: The shell is provided with embedding grooves at two corners on the same side corresponding to the central magnet, and a first welding pad and a second welding pad which are conductive to each other are respectively embedded in the two embedding grooves, the first welding pad is conductive to one of the centering support pieces, and the second welding pad is arranged on the same side as the other centering support piece and both are conductive to the external circuit.

10. The sound-emitting unit according to claim 9, characterized in that: The shell is a non-conductive shell, the first pad and the second pad are both conductive pads, and the first pad and the second pad are connected via a conductive connecting rod.

11. The sound-emitting unit according to claim 10, characterized in that: The housing is an injection-molded housing, the first pad and the second pad are both metal pads, the conductive connecting rod is a metal connecting rod, and the first pad, the second pad, the conductive connecting rod and the housing are integrally injection-molded.

12. The sound-emitting unit according to claim 9, characterized in that: The shell is a conductive shell, the first pad and the second pad are both conductive pads, and the first pad and the second pad are conductively connected via an external conductive member.

13. An electronic device, characterized in that: The electronic device comprises a protective shell and a sound-emitting unit according to any one of claims 1 to 12, wherein the sound-emitting unit is installed in the protective shell.

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