Sound device

Abstract

The present invention discloses a sound-generating device, which includes a housing, a vibration system and a magnetic circuit system connected to the housing, wherein the magnetic circuit system includes a magnetic yoke, the magnetic yoke has a magnetic body and a connecting flange, the magnetic body faces the diaphragm of the vibration system, the connecting flange is formed by bending the magnetic body toward the side where the diaphragm is located, and the connecting flange is provided with a plurality of air holes; a leakage port is formed between the housing and the magnetic body, and the connecting flange completely covers the leakage port. The technical solution of the present invention can reduce the defective rate of products.

Description

Technical Field

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

[0002] In order to realize the full filling technology of the rear sound cavity, the sound-generating device of the related technology generally sets a mesh cloth at the leakage port of the sound-generating device, and the mesh cloth and the shell of the sound-generating device are integrally injection-molded or fixed by bonding.

[0003] However, since the shape of the mesh itself is difficult to maintain, it is easy to cause misalignment between the mesh and the leakage port during one-piece injection molding or bonding, thereby increasing the defective rate of the product. Summary of the invention

[0004] The main purpose of the invention is to provide a sound-generating device, aiming to reduce the defective rate of products.

[0005] To achieve the above object, the sound-generating device proposed in the present invention comprises a housing, a vibration system and a magnetic circuit system connected to the housing, wherein:

[0006] The magnetic circuit system comprises a magnetic yoke, wherein the magnetic yoke has a magnetic body and a connecting flange, wherein the magnetic body faces the diaphragm of the vibration system, the connecting flange is formed by bending the magnetic body toward the side where the diaphragm is located, and the connecting flange is provided with a plurality of air holes;

[0007] A leakage opening is formed between the shell and the magnetic conductive body, and the connecting flange completely covers the leakage opening.

[0008] Optionally, a plurality of first blocking walls are formed on the shell, the first blocking walls extend toward the magnetic conductive body and abut against the magnetic conductive body, and a gap between two adjacent first blocking walls constitutes the leakage port.

[0009] Optionally, the connecting flange is clamped by two adjacent first retaining walls.

[0010] Optionally, the magnetic conductive body is further bent toward the diaphragm to form a positioning flange, and the housing is formed with a positioning notch for the positioning flange to be inserted into.

[0011] Optionally, a plurality of second retaining walls are further formed on the shell, and the second retaining walls extend toward the magnetic conductive body and abut against the magnetic conductive body, wherein the positioning gap is formed between adjacent first retaining walls and second retaining walls.

[0012] Optionally, a surface of the connecting flange facing away from the magnetic conductive body abuts against the outer shell.

[0013] Optionally, a slot is provided on a surface of the shell facing the magnetic conductive body, and the connecting flange is inserted into the slot.

[0014] Optionally, the slot also passes through the outer side of the shell.

[0015] Optionally, the magnetic circuit system further comprises a first side magnet, the first side magnet is arranged corresponding to the side where the connecting flange is located, and there is a first air permeable gap between the first side magnet and the connecting flange; and / or,

[0016] The magnetic circuit system also includes a first side magnetic conductive plate, which is arranged corresponding to the side where the connecting flange is located, and a second air permeable gap exists between the first side magnetic conductive plate and the connecting flange.

[0017] Optionally, the length of the first side magnet is smaller than the length of the connecting flange; the length of the first side magnetic conductive plate is smaller than the length of the connecting flange.

[0018] Optionally, the thickness of the connecting flange is less than or equal to 0.2 mm.

[0019] Optionally, the sound-generating device is rectangular, and each of the two short sides of the sound-generating device is provided with a leakage port, and each leakage port is correspondingly provided with a connecting flange.

[0020] This technical solution achieves full filling by punching microholes on the magnetic yoke and bending the punched microholes to form a connecting flange to replace the bonding or injection molding mesh, which can save space and does not require mold injection, thereby reducing production costs. At the same time, there is no misalignment between the connecting flange and the magnetic body, so as long as the alignment between the magnetic yoke and the shell is accurate, it can be ensured that the connecting flange accurately covers the leakage port. In addition, the material of the connecting flange is the same as the material of the magnetic yoke. The magnetic yoke generally has greater strength and hardness. Even if its thickness is thin, it can ensure that the connecting flange has a stable shape, so it can ensure the connection stability between the connecting flange and the shell, avoid the misalignment of the connecting flange and the leakage port, and thus improve the product yield. In addition, since the connecting flange, as a part of the magnetic yoke, has a magnetic effect itself, it can save space, increase the width of the short side magnet, and improve the acoustic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 It is a structural schematic diagram of an embodiment of a sound-generating device of the present invention;

[0023] Figure 2 for Figure 1 Exploded diagram of the sound-generating device;

[0024] Figure 3 for Figure 1 A schematic cross-sectional view of the sound-generating device;

[0025] Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle;

[0026] Figure 5 for Figure 2 Schematic diagram of the structure of the middle shell;

[0027] Figure 6 for Figure 2 Schematic diagram of the structure of the central magnetic yoke.

[0028] Description of Figure Numbers:

[0029] Label name Label name 10 shell 23 Positioning flange 12 First retaining wall 30 Cover 13 Second retaining wall 41 Center magnet 14 Slots 42 Center magnetic plate 15 Ring body 51 First side magnet 16 Mounting Wall 52 Second side magnet 20 Magnetic yoke 61 The first side magnetic plate 21 Magnetic body 62 Second side magnetic plate 211 The first plate 70 Diaphragm 212 The second plate 80 Voice Coil 22 Connection flange 91 The first air gap 221 Ventilation holes 92 Second ventilation gap

[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 under a certain specific posture (as shown in the accompanying drawings). 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 suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a 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-generating device, which can be used in devices such as headphones, mobile phones, laptops, VR devices, AR devices, and televisions.

[0035] Please refer to Figures 1 to 6 The sound-generating device includes components such as a housing 10, a vibration system, and a magnetic circuit system.

[0036] Among them, the magnetic circuit system includes a magnetic yoke 20, an inner magnetic circuit part and an outer magnetic circuit part. The inner magnetic circuit part and the outer magnetic circuit part are both arranged on the magnetic yoke 20, and the outer magnetic circuit part is arranged outside the inner magnetic circuit part at intervals. The gap between the inner magnetic circuit part and the outer magnetic circuit part forms a magnetic gap.

[0037] Please refer to Figure 2 and Figure 3 For example, the inner magnetic circuit portion includes a central magnet 41 and a central magnetic plate 42 disposed on the central magnet 41. The outer magnetic circuit portion includes a side magnet and a side magnetic plate. The central magnet 41 and the side magnet are disposed on the magnetic yoke 20, the central magnetic plate 42 is stacked with the central magnet 41, and the side magnetic plate is stacked with the side magnet.

[0038] The vibration system includes a diaphragm 70 and a voice coil 80, one end of the voice coil 80 is fixed to the diaphragm 70, and the other end of the voice coil 80 extends into the above-mentioned magnetic gap. The diaphragm 70 includes a central portion and an edge portion arranged around the central portion. In addition, the diaphragm 70 may also include a folded ring portion located between the central portion and the edge portion. In other examples, the diaphragm 70 is a planar structure. A reinforcement layer is also provided in the central portion of the diaphragm 70. The reinforcement layer can effectively reduce the split vibration of the diaphragm 70 and reduce the noise of the sound-generating device.

[0039] Please refer to Figure 5The outer shell 10 may extend in a ring shape along the outer edge of the magnetic yoke 20, and be connected to the magnetic circuit system and the vibration system respectively. For example, the edge of the diaphragm 70 is usually connected to the outer shell 10, that is, the outer shell 10 is arranged around the edge of the diaphragm 70. In addition, the outer shell 10 is also connected to the magnetic yoke 20, or to the side magnet, and the outer shell 10 and the magnetic yoke 20 together enclose a structure open to the diaphragm 70. It should be noted that the annular outer shell 10 refers to a completely closed ring or a non-completely closed ring.

[0040] The sound-generating device can be a square structure, a circular structure, an elliptical structure, etc. The following is an example of a rectangular structure. The sound-generating device includes two long sides and two short sides. The length of the long side is greater than the length of the short side. The long side and short side of the voice coil 80, the diaphragm 70, the housing 10, and the magnetic circuit system correspond to the long side and the short side of the sound-generating device, respectively.

[0041] Please refer to Figure 4 and Figure 6 In the embodiment of the present invention, the magnetic yoke 20 has a magnetic body 21 and a connecting flange 22. The connecting flange 22 is formed by bending the outer edge of the magnetic body 21 toward the side where the housing 10 is located. The connecting flange 22 is provided with a plurality of vent holes 221. The housing 10 is connected to the magnetic yoke 20, and a leakage port is formed between the housing 10 and the magnetic body 21, and the connecting flange 22 completely covers the leakage port.

[0042] The magnetic body 21 is generally plate-shaped and disposed facing the diaphragm 70. The connecting flange 22 is formed by integrally bending the outer edge of the magnetic body 21. The connecting flange 22 and the magnetic body 21 are an integral structure, and no other connecting structure is required to connect the two, so the sealing between the two can be ensured.

[0043] The connecting flange 22 is a mesh structure with multiple micropores, which are air holes 221, that is, they can allow gas to pass through and prevent water droplets from passing through. The leakage port leaks through the micropores of the connecting flange 22, so that the internal space of the sound-generating device maintains sound pressure balance with the outside world.

[0044] The leakage port may be located at the side of the sound-generating device, where the side refers to the surface extending along the outer edge of the diaphragm 70. The entire sound-generating device should be closed except for the leakage port to prevent water from entering the sound-generating device.

[0045] Traditionally, a mesh is generally arranged at the leakage port. However, since the shape of the mesh is difficult to maintain, the mesh is easily misaligned with the leakage port during integral injection molding or bonding.

[0046] In view of this, in the present invention, the connecting flange 22 is formed by directly bending the magnetic yoke 20 as a whole. On the one hand, there is no misalignment between the connecting flange 22 and the magnetic body 21. Therefore, as long as the magnetic yoke 20 and the shell 10 are accurately aligned, it can be ensured that the connecting flange 22 accurately covers the leakage port. On the other hand, the material of the connecting flange 22 is the material of the magnetic yoke 20. The magnetic yoke 20 generally has greater strength and hardness. Even if its thickness is thin, it can ensure that the connecting flange 22 has a stable shape. Therefore, it can ensure the connection stability between the connecting flange 22 and the shell 10, avoid the misalignment of the connecting flange 22 and the leakage port, and thus improve the product yield. On the other hand, the connecting flange 22 has a high strength and can be used as a part of the shell 10 at the same time, playing a protective role for the vibration system and magnetic circuit system and other structures inside the shell 10.

[0047] This technical solution achieves full filling by drilling microholes on the magnetic yoke 20 and bending the microhole positions to form connecting flanges 22 to replace bonding or injection molding mesh cloth, which can save space and does not require mold injection, thereby reducing production costs. In addition, since the connecting flange 22 is a part of the magnetic yoke 20 and has a magnetic effect, it can save space, increase the width of the short side magnet (first side magnet 51), and improve acoustic performance.

[0048] In one embodiment, the thickness of the connecting flange 22 is less than or equal to 0.2 mm. For example, the thickness of the connecting flange 22 can be set to 0.2 mm, 0.115 mm, 0.1 mm, etc. The connecting flange 22 in this size range has a smaller thickness, which can greatly reduce the space occupied by the whole machine.

[0049] Please refer to it again Figure 4 In one embodiment, the magnetic body 21 has a first plate 211 and a second plate 212 connected to each other, the thickness of the first plate 211 is greater than the thickness of the second plate 212, so that the surface of the magnetic body 21 facing away from the housing 10 is stepped, and the connecting flange 22 is connected to the second plate 212. In this way, the thicker first plate 211 can ensure the structural strength of the magnetic yoke 20, while the thinner second plate 212 can ensure that the connecting flange 22 is also thin, so as to avoid the sound-generating device being too large in the thickness direction of the connecting flange 22.

[0050] In order to ensure the integrity and strength of the magnetic body 21, a cover plate 30 may be provided on the second plate 212. The shape of the cover plate 30 is substantially the same as that of the second plate 212, so as to better fit the step surface between the first plate 211 and the second plate 212. Furthermore, when a clearance opening is provided on the second plate 212 to make way for the movement of the centering support piece inside the sound-generating device, the cover plate 30 may also seal and cover the clearance opening.

[0051] Please refer to it again Figure 1 and Figure 5 In one embodiment, a plurality of first retaining walls 12 are formed on the shell 10, and the first retaining walls 12 extend toward the magnetic body 21 and abut against the magnetic body 21, and the interval between two adjacent first retaining walls 12 constitutes the leakage port. The provision of the first retaining walls 12 can ensure that the magnetic body 21 and the shell 10 are spaced apart to form the leakage port, and the first retaining walls 12 can also ensure that the magnetic yoke 20 and the shell 10 are accurately aligned. In addition, the leakage port can also be formed by the shell 10, the magnetic yoke 20 and the side magnets together enclosing to form the leakage port, or the retaining wall extending from the magnetic body 21 abuts against the shell 10 to form the leakage port.

[0052] In one embodiment, the connecting flange 22 is clamped by two adjacent first retaining walls 12, that is, both sides of the connecting flange 22 are sealed and abutted against the corresponding first retaining walls 12, and the first retaining walls 12 limit the circumferential movement of the connecting flange 22 along the housing 10, thereby ensuring the installation stability of the magnetic yoke 20. In addition, the connecting flange 22 is clamped by the two first retaining walls 12, rather than being covered on the outside of the first retaining walls 12, and the connecting flange 22 can be accommodated in the space between the two first retaining walls 12, so as to prevent the connecting flange 22 from exceeding the outer side of the first retaining wall 12, thereby reducing the space occupied by the magnetic yoke 20 in the thickness direction of the connecting flange 22, and ensuring that the sound-generating device has a smaller size in the thickness direction of the connecting flange 22.

[0053] In one embodiment, the magnetic body 21 is further bent toward the diaphragm 70 to form a positioning flange 23, and a positioning notch is formed on the housing 10 for the positioning flange 23 to be inserted. In this embodiment, the positioning flange 23 and the connecting flange 22 are distributed at intervals along the circumference of the magnetic body 21. The positioning flange 23 mainly plays a positioning role, and its protruding height relative to the magnetic body 21 can be small, so the housing 10 corresponding to the positioning flange 23 has a higher height along the vibration direction and greater strength.

[0054] The housing 10 is also provided with a plurality of second retaining walls 13, which extend toward the magnetic body 21 and abut against the magnetic body 21, wherein the positioning notch is formed between adjacent first retaining walls 12 and second retaining walls 13. The positioning notch and the leakage port share a first retaining wall 12, which can reduce the number of retaining walls on the housing 10 and is conducive to simplifying the structure.

[0055] In addition, a positioning notch may be formed between two adjacent second retaining walls 13 , or a groove may be directly provided on the housing 10 for the positioning flange 23 to be inserted into.

[0056] In one embodiment, the surface of the connecting flange 22 facing away from the magnetic body 21 abuts against the outer shell 10. On the one hand, the outer shell 10 limits the movement of the connecting flange 22 toward the diaphragm 70, thereby playing a limiting role. On the other hand, the size of the connecting flange 22 exceeding the outer surface of the outer shell 10 can be reduced. Optionally, the outer surface of the connecting flange 22 is flush with the outer surface of the outer shell 10, thereby avoiding the increase in the size of the entire sound-emitting device in the thickness direction of the connecting flange 22 due to the setting of the connecting flange 22.

[0057] In order to better limit the position, in one embodiment, the surface of the housing 10 facing the magnetic conductive body 21 is provided with a slot 14, and the connecting flange 22 is inserted into the slot 14. In this embodiment, the connecting flange 22 is sealed and plugged with the slot 14, and the setting of the slot 14 can accommodate more glue to ensure the sealing of the connection between the connecting flange 22 and the housing 10. Specifically, the housing 10 includes an annular body 15, the first retaining wall 12 is provided on the annular body 15, and the surface of the annular body 15 facing the magnetic conductive body 21 is provided with a slot 14.

[0058] In addition, the slot 14 can also penetrate the outer side of the housing 10 to form a structure similar to a notch. In this embodiment, the outer side of the housing 10 refers to the surface facing away from the central magnet 41. After the notch is formed in the slot 14, it only has a first slot wall close to the inner side of the housing 10 and a second slot wall facing the magnetic conductive body 21. Under the condition of ensuring that the wall thickness of the housing 10 is small, the formed slot 14 can have a large width for the connecting flange 22 to be inserted, so as to ensure that the size of the entire sound-generating device is small.

[0059] The following description is made by assuming that the side magnet corresponding to the connecting flange 22 is the first side magnet 51 and the side magnetic conductive plate corresponding to the connecting flange 22 is the first side magnetic conductive plate 61:

[0060] Please refer to it again Figure 4 In one embodiment, the magnetic circuit system further includes a first side magnet 51, the first side magnet 51 is arranged corresponding to the side where the connecting flange 22 is located, and a first air permeable gap 91 exists between the first side magnet 51 and the connecting flange 22. Specifically, the magnetic circuit system has a plurality of side magnets, the first side magnet 51 is arranged corresponding to the connecting flange 22, and the other side magnets are second side magnets 52. For example, the sound-generating device is square for illustration, there are two first side magnets 51, and there are two second side magnets 52, and both the first side magnet 51 and the second side magnet 52 extend along the circumference of the magnetic conductive body 21 in the shape of long strips.

[0061] The first air gap 91 between the first side magnet 51 and the connecting flange 22 can prevent the first side magnet 51 from covering the air hole 221, so that the interior of the sound-emitting device can be connected to the outside through the first air gap 91 and the air hole 221, ensuring smooth airflow.

[0062] In one embodiment, the length of the first side magnet 51 is less than the length of the connecting flange 22. The length in this embodiment refers to the length extending along the circumference of the magnetic body 21. The length of the first side magnet 51 is smaller, so the shielding area of ​​the connecting flange 22 is smaller, so that the gas flow inside and outside the sound-generating device is smoother.

[0063] In one embodiment, the magnetic circuit system further includes a first side magnetic conductive plate 61, the first side magnetic conductive plate 61 is correspondingly arranged on the side where the connecting flange 22 is located, and a second air permeable gap 92 exists between the first side magnetic conductive plate 61 and the connecting flange 22. Specifically, the magnetic circuit system has a plurality of side magnetic conductive plates, the first side magnetic conductive plate 61 is arranged corresponding to the connecting flange 22, and the other side magnetic conductive plates are second side magnetic conductive plates 62. For example, the sound-generating device is square for illustration, there are two first side magnetic conductive plates 61, and there are two second side magnetic conductive plates 62, and both the first side magnetic conductive plates 61 and the second side magnetic conductive plates 62 extend along the circumference of the magnetic conductive body 21 in the shape of long strips.

[0064] The second air permeable gap 92 between the first side magnetic conductive plate 61 and the connecting flange 22 can prevent the first side magnetic conductive plate 61 from covering the air hole 221, so that the interior of the sound-generating device can be connected to the outside through the second air permeable gap 92 and the air hole 221, ensuring smooth airflow.

[0065] In one embodiment, the length of the first side magnetic conductive plate 61 is less than the length of the connecting flange 22. The length in this embodiment refers to the length extending along the circumference of the magnetic conductive body 21. The length of the first side magnetic conductive plate 61 is smaller, so the shielding area of ​​the connecting flange 22 is smaller, so that the gas flow inside and outside the sound-generating device is smoother.

[0066] In this embodiment, the first side magnetic conductive plate 61 and the first side magnet 51 are stacked in the vibration direction, and the widths of the two can be the same, so that the inner and outer sides of the two are flush with each other. The first air permeable gap 91 and the second air permeable gap 92 correspond to each other in the vibration direction, and together form an integral air permeable gap.

[0067] In addition, the annular body 15 of the housing 10 may extend inwardly to form a mounting wall 16 , the mounting wall 16 faces the magnetic conductive body 21 , and the surface of the magnetic conductive plate facing away from the magnetic conductive body 21 abuts against the mounting wall 16 .

[0068] It should be noted that the housing 10 in the present invention can be formed by one component, or the housing 10 is composed of multiple parts. For example, the housing 10 includes interconnected plastic parts and the above-mentioned side magnetic conductive plates, and the side magnetic conductive plates can be integrally injection molded with the plastic parts. Among them, the plastic part itself can be a closed annular structure, and the side magnetic conductive plate is located on its inner side. Or, the plastic part and the side magnetic conductive plate are together enclosed to form a closed annular structure. In addition, the housing 10 can also include plastic parts, metal parts and side magnetic conductive plates. Of course, the housing 10 can also be a metal housing 10, a part of which constitutes the side magnetic conductive plate.

[0069] In one embodiment, the sound-generating device is rectangular, and each of the two short sides of the sound-generating device is provided with a leakage port, and each leakage port is provided with a corresponding connecting flange 22. The provision of two leakage ports enables the sound-generating device to have a larger gas exchange channel and a better pressure relief effect. In addition, the two leakage ports are provided at opposite positions, and the convection effect is better.

[0070] The above are only preferred 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-generating device, characterized in that: The invention comprises a housing, a vibration system and a magnetic circuit system connected to the housing, wherein the magnetic circuit system comprises a magnetic yoke, the magnetic yoke has a magnetic body and a connecting flange, the magnetic body faces the diaphragm of the vibration system, and the connecting flange is formed by bending the magnetic body toward the side where the diaphragm is located; a leakage port is formed between the housing and the magnetic body, and the connecting flange completely covers the leakage port; The connecting flange is a mesh structure with multiple micropores, and the micropores are air-permeable holes; A plurality of first blocking walls are formed on the housing, the first blocking walls extend toward the magnetic conductive body and abut against the magnetic conductive body, and the interval between two adjacent first blocking walls constitutes the leakage port; The magnetic conductive body is also bent toward the diaphragm to form a positioning flange, and the housing is formed with a positioning notch for the positioning flange to be inserted; A plurality of second retaining walls are also formed on the housing, the second retaining walls extend toward the magnetic conductive body and abut against the magnetic conductive body, wherein the positioning notch is formed between adjacent first retaining walls and second retaining walls; The magnetic conductive body comprises a first plate body and a second plate body which are connected to each other, wherein the thickness of the first plate body is greater than that of the second plate body, so that the surface of the magnetic conductive body which faces away from the outer shell is arranged in a step shape, and the connecting flange is connected to the second plate body; the second plate body is provided with a clearance opening, and a cover plate is provided on the side of the second plate body which faces away from the outer shell, and the cover plate is arranged to fit with the step surface between the first plate body and the second plate body, and the cover plate is used to seal and cover the clearance opening.

2. The sound generating device according to claim 1, characterized in that: The connecting flange is clamped by two adjacent first retaining walls.

3. The sound-generating device according to any one of claims 1 to 2, characterized in that: The surface of the connecting flange facing away from the magnetic conductive body abuts against the shell.

4. The sound-generating device according to claim 3, characterized in that: A slot is provided on a surface of the shell facing the magnetic conductive body, and the connecting flange is inserted into the slot.

5. The sound generating device according to claim 4, characterized in that: The slot also passes through the outer side of the shell.

6. The sound generating device according to claim 1, characterized in that: The magnetic circuit system further includes a first side magnet, the first side magnet is arranged corresponding to the side where the connecting flange is located, and there is a first air permeable gap between the first side magnet and the connecting flange; and / or, The magnetic circuit system also includes a first side magnetic conductive plate, which is arranged corresponding to the side where the connecting flange is located, and a second air permeable gap exists between the first side magnetic conductive plate and the connecting flange.

7. The sound generating device according to claim 6, characterized in that: The length of the first side magnet is smaller than the length of the connecting flange; the length of the first side magnetic conductive plate is smaller than the length of the connecting flange.

8. The sound generating device according to claim 1, characterized in that: The thickness of the connecting flange is less than or equal to 0.2 mm.

9. The sound generating device according to claim 1, characterized in that: The sound-generating device is rectangular, and each of the two short sides of the sound-generating device is provided with a leakage port, and each leakage port is correspondingly provided with a connecting flange.

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