Sound device

Abstract

The present invention discloses a sound-generating device, comprising: a magnetic yoke; a housing extending in a ring shape along the edge of the magnetic yoke, a gap between the housing and the magnetic yoke forming a leakage port; and a metal mesh covering the leakage port, the metal mesh having a plurality of air holes at positions corresponding to 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 by the present invention comprises:

[0006] Magnetic yoke;

[0007] a housing extending in a ring shape along the edge of the magnetic yoke, wherein a leakage port is formed in a gap between the housing and the magnetic yoke; and

[0008] The metal mesh covers the leakage opening, and the metal mesh is provided with a plurality of air holes at positions corresponding to the leakage opening.

[0009] Optionally, the metal mesh has a covering section and a connecting section, the connecting section is connected to a surface of the magnetic yoke facing away from the outer shell, the covering section covers the leakage port, and a plurality of the air holes are formed on the covering section.

[0010] Optionally, a surface of the magnetic yoke facing away from the shell is provided with a clearance groove, and the connecting section is located in the clearance groove.

[0011] Optionally, the connecting section is welded or bonded to the magnetic yoke.

[0012] Optionally, the sound-generating device further comprises a magnetic circuit system and a vibration system, wherein the magnetic circuit system comprises a central magnet and side magnets arranged around the central magnet, and the interval between the central magnet and the side magnets constitutes a magnetic gap;

[0013] The vibration system includes a diaphragm, a voice coil and a support plate, wherein the voice coil extends into the magnetic gap; the support plate is located at one end of the voice coil close to the magnetic yoke, and the support plate is electrically connected to the voice coil;

[0014] A clearance hole is provided on the magnetic yoke and corresponds to the support piece, and the connecting section covers the clearance hole.

[0015] Optionally, the sound-generating device is square, and each of the four corners of the sound-generating device is provided with a support sheet, and each of the four corners of the magnetic yoke is provided with a corresponding clearance hole.

[0016] Optionally, an insertion notch is provided on the outer shell and on the hole wall of the leakage port, and the metal mesh is inserted into the insertion notch.

[0017] Optionally, a plurality of retaining walls are extended from the edge of at least one of the magnetic yoke and the shell in a direction approaching each other, and the retaining wall abuts against the other, wherein the space between two adjacent retaining walls constitutes the leakage port.

[0018] Optionally, multiple groups of positioning structures are formed between the magnetic yoke and the outer shell, each group of the positioning structures includes two of the baffle walls arranged on the outer shell, and one of the baffle walls arranged on the magnetic yoke, wherein the baffle wall on the magnetic yoke is inserted between the two baffle walls on the outer shell; and the gap between two adjacent groups of the positioning structures constitutes the leakage port.

[0019] Optionally, the sound-generating device is square in shape, and each of the two short sides of the sound-generating device is provided with a leakage port, and each leakage port corresponds to one of the metal meshes.

[0020] Optionally, the thickness of the metal mesh is less than or equal to 0.2 mm.

[0021] Optionally, the shell includes a shell portion and a mounting portion, the shell portion is a metal part, the shell portion extends along the outer edge of the magnetic yoke and is annular, the shell portion is provided with a clearance gap on the surface facing the magnetic yoke, and the clearance gap penetrates the outer edge of the shell portion outward; the mounting portion is arranged in the clearance gap, the mounting portion is a plastic part, and is injection molded integrally with the shell portion.

[0022] Optionally, the shell portion includes a stacked metal ring and an annular washer, the metal ring is connected to the edge of the diaphragm, the annular washer is arranged on the side magnet, a portion of the outer edge of the annular washer is provided with the clearance gap, the metal ring has an installation area exposed from the clearance gap, and the installation portion is arranged in the installation area.

[0023] Optionally, the shell includes a plastic shell and a metal washer, the plastic shell and the metal washer are both ring-shaped, and the plastic shell and the metal washer are integrally injection-molded.

[0024] The present invention adopts the form of a metal mesh. On the one hand, the metal mesh has greater strength and hardness. Even if it is thin, it can ensure that the metal mesh has a stable shape, so it can ensure the connection stability between the metal mesh and the shell or the magnetic yoke, avoid the misalignment of the metal mesh and the leakage port, and thus improve the product yield. On the other hand, the metal mesh has a high strength and can be used as a part of the shell at the same time, playing a protective role for the vibration system and magnetic circuit system and other structures inside the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 It is a structural schematic diagram of an embodiment of a sound-generating device of the present invention;

[0027] Figure 2 for Figure 1 A schematic diagram of the structure of the sound-generating device from another angle;

[0028] Figure 3 for Figure 1 A schematic plan view of the sound-generating device;

[0029] Figure 4 for Figure 3 A schematic cross-sectional view of the sound-generating device along AA;

[0030] Figure 5 for Figure 4 Schematic diagram of the structure of the metal mesh;

[0031] Figure 6 for Figure 1 Schematic diagram of the structure of the middle shell;

[0032] Figure 7 for Figure 6 A schematic diagram of the structure of the middle shell viewed from another angle;

[0033] Figure 8 for Figure 7 Schematic diagram of the structure of the metal ring;

[0034] Fig. 9 for Figure 8 A schematic diagram of the structure of the middle metal ring viewed from another angle;

[0035] Fig.10 for Figure 7 Schematic diagram of the structure of the middle ring washer;

[0036] Fig.11 for Fig.10 Schematic diagram of the structure of the middle ring washer from another angle;

[0037] Fig.12 for Figure 6 A schematic plan view of the middle shell;

[0038] Fig.13 for Fig.12 Schematic diagram of the cutaway of the middle shell along BB;

[0039] Fig.14 for Fig.12 Schematic diagram of the cross section of the middle shell along CC;

[0040] Fig.15 It is a structural schematic diagram of another embodiment of the sound-generating device of the present invention;

[0041] Fig.16 for Fig.15 A schematic diagram of the structure of the sound-generating device from another angle;

[0042] Fig.17 for Fig.15 Exploded diagram of the sound-generating device;

[0043] Fig.18 for Fig.17 Schematic diagram of the structure of the middle shell;

[0044] Fig.19 for Fig.18 Schematic diagram of the structure of the middle shell viewed from another angle.

[0045] Description of Figure Numbers:

[0046] Label name Label name 10 shell 16 Plastic housing 111 Leakage 17 Metal Washers 112 Plug notch 20 Magnetic yoke 113 / 113＇ Retaining wall 21 Recess 114 Positioning structure 22 Make way hole 12 Housing 31 Center magnet 13 Metal ring 32 Center magnetic plate 131 Installation Area 33 Edge magnet 132 Glue hole 41 Diaphragm 133 First annular body 411 Center 134 First Edge Wash 412 Edge 14 Ring Washer 413 Ring part 141 Positioning boss 42 Voice Coil 142 Rubber grab boss 50 Metal Mesh 143 Grip groove 51 Cover segment 144 Make way for the gap 52 Connection segment 145 Second annular body 60 Support piece 146 Second side wash 70 Pads 15 Installation Department

[0047] 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

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Please refer to Figures 1 to 4 The sound-generating device includes a housing 10 (such as Figure 6 As shown), vibration system and magnetic circuit system and other components.

[0053] The magnetic circuit system includes a magnetic yoke 20, on which an inner magnetic circuit part and an outer magnetic circuit part are arranged. The outer magnetic circuit part is arranged outside the inner magnetic circuit part at intervals, and the gap between the inner magnetic circuit part and the outer magnetic circuit part forms a magnetic gap.

[0054] For example, the inner magnetic circuit portion includes a central magnet 31 and a central magnetic plate 32 disposed on the central magnet 31. The outer magnetic circuit portion includes a side magnet 33. The central magnet 31 and the side magnet 33 are disposed on the magnetic yoke 20, and the central magnetic plate 32 is disposed on the central magnet 31. The side magnetic plates may extend in a ring shape along the circumference of the magnetic yoke 20, or may be provided with only one side magnetic plate on two opposite sides of the magnetic yoke 20, or may be provided with one or more side magnetic plates on each side of the magnetic yoke 20, and so on.

[0055] The vibration system includes a diaphragm 41 and a voice coil 42, one end of the voice coil 42 is fixed to the diaphragm 41, and the other end of the voice coil 42 extends into the above-mentioned magnetic gap. The diaphragm 41 includes a central portion 411 and an edge portion 412 arranged around the central portion 411. In addition, the diaphragm 41 may also include a folded ring portion 413 located between the central portion 411 and the edge portion 412. In other examples, the diaphragm 41 is a planar structure. The material of the diaphragm 41 is PEEK or other polymer materials. A reinforcement layer is also provided in the central portion 411 of the diaphragm 41. The reinforcement layer can effectively reduce the split vibration of the diaphragm 41 and reduce the noise of the sound-generating device.

[0056] The outer shell 10 extends in a ring shape along the outer edge of the magnetic yoke 20, and is respectively connected to the magnetic circuit system and the vibration system. For example, the edge portion 412 of the diaphragm 41 is usually connected to the outer shell 10, that is, the outer shell 10 is arranged around the edge portion 412 of the diaphragm 41. In addition, the outer shell 10 is also connected to the magnetic yoke 20, or connected to the side magnet 33, and the outer shell 10, the magnetic yoke 20 and the side magnet 33 together enclose a structure open to the diaphragm 41. It should be noted that the annular outer shell 10 refers to a completely closed ring or a non-completely closed ring.

[0057] 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. As shown in the figure, 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 42, the diaphragm 41, the housing 10, and the magnetic circuit system correspond to the long side and the short side of the sound-generating device, respectively.

[0058] In the embodiment of the present invention, the housing 10 extends in a ring shape along the edge of the magnetic yoke 20 , and a leakage port 111 is formed in the gap between the housing 10 and the magnetic yoke 20 . The leakage port 111 is located on the side of the sound generating device.

[0059] Please refer to Figure 5 The sound-generating device further comprises a metal mesh 50 , which covers the leakage opening 111 , and the metal mesh 50 is provided with a plurality of air holes corresponding to the position of the leakage opening 111 .

[0060] It should be noted that the metal mesh 50 is a mesh structure with multiple meshes, which are air holes. The leakage port 111 leaks through the meshes of the metal mesh 50, so that the internal space of the sound-generating device maintains sound pressure balance with the outside, eliminating the need to open an additional leakage hole structure.

[0061] The metal mesh 50 may be connected to any one of the magnetic yoke 20 and the housing 10, or the metal mesh 50 may be connected to both the magnetic yoke 20 and the housing 10. For example, in some embodiments, the metal mesh 50 and the magnetic yoke 20 are welded or bonded.

[0062] Conventionally, a mesh is generally provided at the leakage opening 111 , but since the shape of the mesh is difficult to maintain, the mesh is easily misaligned with the leakage opening 111 during integral injection molding or bonding.

[0063] In view of this, the present invention adopts the form of a metal mesh 50. On the one hand, the metal mesh 50 has great strength and hardness. Even if it is thin, it can ensure that the metal mesh 50 has a stable shape, so it can ensure the connection stability between the metal mesh 50 and the housing 10 or the magnetic yoke 20, avoid the misalignment of the metal mesh 50 and the leakage port 111, and thus improve the product yield. On the other hand, the metal mesh 50 has high strength and can be used as a part of the housing 10 at the same time, playing a protective role for the vibration system and magnetic circuit system and other structures inside the housing 10.

[0064] In one embodiment, the thickness of the metal mesh 50 is less than or equal to 0.2 mm. For example, the thickness of the metal mesh 50 can be set to 0.2 mm, 0.115 mm, 0.1 mm, etc. The metal mesh 50 in this size range has a smaller thickness, which can greatly reduce the space occupied by the whole machine.

[0065] Please refer to Fig.16 and Fig.17 , the following description will be made by taking the connection between the metal mesh 50 and the magnetic yoke 20 as an example. Specifically, the metal mesh 50 has a covering section 51 and a connecting section 52. The connecting section 52 is connected to the surface of the magnetic yoke 20 away from the outer shell 10. The covering section 51 covers the leakage port 111. The covering section 51 is provided with a plurality of air holes. In this embodiment, the connecting section 52 and the covering section 51 are combined to form an L-shaped structure. The connecting section 52 is arranged on the surface of the magnetic yoke 20 away from the outer shell 10, which can limit the movement of the entire metal mesh 50 in the direction close to the outer shell 10. In order to ensure strength, no air holes are provided on the connecting section 52, and a plurality of air holes are provided only on the covering section 51, that is, the connecting section 52 is a complete plate body, and the covering section 51 is a mesh plate. Of course, air holes can be provided on the connecting section 52 as needed.

[0066] In addition, the connecting section 52 is welded or bonded to the magnetic yoke 20 .

[0067] In one embodiment, a clearance groove 21 is provided on the surface of the magnetic yoke 20 away from the housing 10, and the connecting section 52 is located in the clearance groove 21. It should be noted that the connecting section 52 is adapted to the clearance groove 21, that is, the connecting section 52 can generally contact the groove wall of the clearance groove 21, and the two are interlocked with each other, thereby limiting the movement of the connecting section 52. Optionally, the surface of the connecting section 52 away from the housing 10 is flush with the surface of the magnetic yoke 20 away from the housing 10, or the surface of the connecting section 52 away from the housing 10 is lower than the surface of the magnetic yoke 20 away from the housing 10. The provision of the clearance groove 21, on the one hand, can limit the connecting section 52 and prevent the connecting section 52 from moving along the plate surface of the magnetic yoke 20; on the other hand, it avoids the connecting section 52 protruding out of the magnetic yoke 20 and occupying the space of the entire machine, thereby ensuring the miniaturization of the entire sound-generating device. In addition, since the connecting section 52 is a metal structure, it can fill the recess 21 of the magnetic yoke 20 to ensure the magnetic conductivity of the magnetic yoke 20 .

[0068] In one embodiment, the vibration system further includes a support piece 60, the support piece 60 is located at one end of the voice coil 42 close to the magnetic yoke 20, and the support piece 60 is electrically connected to the voice coil 42. A clearance hole 22 is provided on the magnetic yoke 20 and corresponds to the support piece 60, and the connecting section 52 covers the clearance hole 22. The provision of the clearance hole 22 provides clearance space for the vibration of the support piece 60. In the embodiment in which the clearance groove 21 is provided, the clearance hole 22 is provided at the bottom of the clearance groove 21.

[0069] For the embodiment in which the sound-generating device is square, each of the four corners of the sound-generating device is provided with a support piece 60, and each of the four corners of the magnetic yoke 20 is provided with a corresponding hole 22. Thus, the connecting section 52 can be an integral plate body, covering the four holes 22 together, or the connecting section 52 is in a ring shape, a cross structure, etc.

[0070] In one embodiment, the sound-generating device is square, and each of the two short sides of the sound-generating device is provided with a leakage port 111, and each leakage port 111 corresponds to a metal mesh 50. The formation of two leakage ports 111 can enhance the overall pressure relief effect.

[0071] In this embodiment, the connecting section 52 includes two cover plates and a connecting plate connecting the two cover plates. The two cover plates are arranged corresponding to the two clearance holes 22. This can reduce the area of ​​the connecting section 52 and the coverage area of ​​the clearance groove 21, thereby ensuring the strength of the magnetic yoke 20.

[0072] In order to ensure that the metal mesh 50 and the leakage port 111 are accurately aligned, in one embodiment, a plug-in notch 112 is provided on the housing 10 and on the hole wall of the leakage port 111, and the metal mesh 50 is inserted into the plug-in notch 112. Specifically, the surface of the housing 10 facing the magnetic yoke 20 has a plug-in notch 112 on the surface adjacent to the surface. During assembly, the metal mesh 50 is inserted from the side where the magnetic yoke 20 is located to the side where the housing 10 is located, and the covering section 51 of the metal mesh 50 moves toward the housing 10 along the edge of the magnetic yoke 20, and is inserted into the plug-in notch 112 at the hole edges of the two opposite sides of the leakage port 111, moves toward the housing 10 along the plug-in notch 112, and finally is inserted into the plug-in notch 112 on the surface of the housing 10 facing the magnetic yoke 20. In this way, the contact area between the metal mesh 50 and the housing 10 can be guaranteed, and the metal mesh 50 can be better limited.

[0073] Please refer to it again Figure 2 In one embodiment, a plurality of retaining walls 113 are extended from the edge of at least one of the magnetic yoke 20 and the housing 10 in a direction close to each other, and the retaining wall 113 abuts against another one, wherein the space between two adjacent retaining walls 113 constitutes the leakage port 111.

[0074] For example, the housing 10 is provided with a plurality of retaining walls 113 , which extend toward the side where the magnetic yoke 20 is located and abut against the magnetic yoke 20 . The gaps between some retaining walls 113 can be blocked by the side magnets 33 , and the gaps between other retaining walls 113 can constitute leakage openings 111 .

[0075] In the square sound-generating device, the side magnets 33 on the long sides block the space between two adjacent blocking walls 113 , and the space between the two blocking walls 113 on the short sides constitutes the leakage opening 111 .

[0076] The setting of the retaining wall 113 can ensure that the magnetic yoke 20 and the housing 10 are spaced apart to form the leakage opening 111, without opening a hole in the magnetic yoke 20. In addition, the retaining wall 113 can limit the side magnet 33 by abutting against the edge of the side magnet 33.

[0077] In addition, the leakage opening 111 can also be formed by the housing 10 , the magnetic yoke 20 and the edge magnet 33 .

[0078] In one embodiment, a plurality of groups of positioning structures 114 are formed between the magnetic yoke 20 and the outer shell 10, and each group of the positioning structures 114 includes two blocking walls 113 arranged on the outer shell 10, and one blocking wall 113′ arranged on the magnetic yoke 20, wherein the blocking wall 113′ on the magnetic yoke 20 is inserted between the two blocking walls 113 on the outer shell 10; and the interval between two adjacent groups of the positioning structures 114 constitutes the leakage port 111.

[0079] In the same set of positioning structures 114, the three retaining walls 113 are equivalent to forming a mutually interlocking structure, so they can restrain each other and avoid relative movement. At the same time, the retaining wall 113' on the magnetic yoke 20 is connected with the two retaining walls 113 on the housing 10 to form a complete retaining wall 113, avoiding the generation of gaps.

[0080] In this embodiment, the retaining wall 113 on the housing 10 forms the hole edge of the leakage opening 111 . The retaining wall 113 is provided with an inserting notch 112 . The inserting notch 112 extends along the arrangement direction of the housing 10 and the magnetic yoke 20 .

[0081] The housing 10 mentioned above can be a metal structure or a plastic structure, or the housing 10 can be a combination of a metal structure and a plastic structure. The structure of the housing 10 is specifically introduced below through two embodiments, but is not limited thereto.

[0082] Please refer to Figures 1 to 14 In one embodiment, the housing 10 includes a shell portion 12 and a mounting portion 15, the shell portion 12 is a metal part, the shell portion 12 extends along the outer edge of the magnetic yoke 20 and is annular, and a clearance gap 144 is opened on the surface of the shell portion 12 facing the magnetic yoke 20, and the clearance gap 144 penetrates the outer edge of the shell portion 12 outward; the mounting portion 15 is arranged in the clearance gap 144, the mounting portion 15 is a plastic part, and is integrally injection molded with the shell portion 12.

[0083] The conventional housing 10 is generally a plastic part. Since the thermal conductivity of the plastic part is low, its heat dissipation performance is poor, which easily affects the sound effect of the sound-generating device. In view of this, the shell part 12 of the housing 10 in the embodiment of the present invention is designed as a metal housing 10. Since the thermal conductivity of metal is high, the housing 10 can dissipate heat better, which can improve the heat dissipation effect of the sound-generating device.

[0084] Please refer to Figures 6 to 11In one embodiment, the shell portion 12 is formed by combining a plurality of components. For example, the shell portion 12 includes a metal ring 13 and an annular washer 14 which are stacked. The metal ring 13 extends along the edge portion 412 and is connected to the edge portion 412. The annular washer 14 is disposed on the edge magnet 33. The metal ring 13 and the annular washer 14 are formed separately and the two are finally assembled. For example, the metal ring 13 and the annular washer 14 are bonded or welded together. Of course, the metal ring 13 and the annular washer 14 may also be formed as one piece. In addition, the metal ring 13 and the annular washer 14 are stacked, which means that both are annular and their annular main parts fit each other.

[0085] The annular washer 14 is arranged at the outer periphery of the central magnetic conductive plate 32, and the gap formed between the two and the gap formed between the side magnets 33 and the central magnet 31 together constitute the above-mentioned magnetic gap. In this embodiment, the annular washer 14 not only plays a magnetic conductive role, but also can serve as a part of the housing 10 to protect the vibration system and magnetic circuit system therein.

[0086] The metal ring 13 and the ring washer 14 are made of metal, such as copper, iron, nickel, etc. Metal materials have the characteristics of fast heat conduction speed and good heat dissipation effect. This makes the temperature of the voice coil 42 and the surface temperature of the sound-generating device lower under the same power, and the temperature resistance is better.

[0087] In this embodiment, the annular washer 14 does not completely cover the metal ring 13. For example, a clearance gap 144 is provided at a portion of the outer edge of the annular washer 14, and the metal ring 13 has a mounting area 131 exposed from the clearance gap 144. The clearance gap 144 in this embodiment refers to two opposite surfaces of the annular washer 14 that pass through the vibration direction of the vibration system. The vibration direction of the vibration system is the vibration direction of the diaphragm 41, that is, the arrangement direction of the magnetic yoke 20 and the diaphragm 41. In this way, at the position where the clearance gap 144 is provided, a portion of the surface of the metal ring 13 facing the magnetic yoke 20 can be exposed.

[0088] The mounting portion 15 is disposed in the mounting area 131. The mounting portion 15 is a plastic part and is integrally injection molded with the metal ring 13 and the annular washer 14. Before injection molding, the metal ring 13 and the annular washer 14 are positioned at corresponding positions of the injection mold, and then the injection plastic is injected into the mold to fill the clearance gap 144 at the mounting area 131. After the injection plastic is solidified, a fixed connection is formed, thereby forming the mounting portion 15.

[0089] In this embodiment, the mounting portion 15 is filled in the position of the clearance gap 144, and the clearance gap 144 can be filled, thereby ensuring the integrity of the shell 10 and avoiding the appearance of the gap. The opening of the clearance gap 144 provides a storage space for the installation of the mounting portion 15, avoiding the shell 10 from being too thick at the position where the mounting portion 15 is provided. In addition, the mounting portion 15 can simultaneously contact the mounting area 131 on the metal ring 13 and the edge of the clearance gap 144 on the annular washer 14, so that the metal ring 13 and the annular washer 14 can be connected at the same time to avoid mutual movement between the two. In addition, by providing a mounting portion 15 of a plastic structure on the shell 10, it can be used to form some more complex structures in the form of injection molding, for example, some positioning structures 114 can be formed, thereby facilitating the molding of the shell 10.

[0090] In addition, the pad 70 can be disposed on the mounting portion 15 , and the mounting portion 15 provides a location for disposing the pad 70 . The lead wire connected to the voice coil 42 is led out and then soldered to the pad 70 on the mounting portion 15 .

[0091] The solder pad 70 is connected to the mounting portion 15 by bonding. In some embodiments, the solder pad 70 is not provided on the mounting portion 15 .

[0092] For the square sound-generating device, the metal ring 13 and the annular washer 14 are both square. In one embodiment, the clearance notch 144 is located at the corner of the annular washer 14, and the mounting area 131 is located at the corner of the metal ring 13. Optionally, a clearance notch 144 is provided at each of the four corners of the annular washer 14, and each of the four corners of the metal ring 13 has a mounting area 131, so that a mounting portion 15 is provided at each of the four corners of the sound-generating device. In this embodiment, the clearance notch 144 is equivalent to being formed by cutting off the corner of the annular washer 14.

[0093] Please refer to Fig.10 , Fig.12 and Fig.13In one embodiment, a positioning boss 141 is provided on the annular washer 14 and at the edge of the clearance notch 144. The positioning boss 141 extends toward the direction of the side magnet 33, and the positioning boss 141 is at least partially wrapped in the mounting portion 15; the structure formed by the combination of the positioning boss 141 and the mounting portion 15 abuts against the edge of the side magnet 33. The provision of the positioning boss 141 can provide more attachment area for the mounting portion 15, thereby ensuring the contact area between the mounting portion 15 and the annular washer 14 and ensuring the stability of the connection of the mounting portion 15. During injection molding of the mounting portion 15, the entire positioning boss 141 can be wrapped inside, or the positioning boss 141 can be partially wrapped inside. The columnar structure finally formed by the two (i.e., the retaining wall 113 mentioned above) abuts against the side edge of the side magnet 33, which has a positioning effect on the side magnet 33.

[0094] For example, the sound-generating device is of a square structure, the positioning boss 141 is located on the long side of the sound-generating device, and the columnar structure formed by the positioning boss 141 and the mounting portion 15 abuts against the side magnet 33 located on the long side of the sound-generating device. Optionally, two positioning bosses 141 are provided at the same long side, and the two columnar structures formed by the two positioning bosses 141 and the mounting portion 15 respectively abut against the two opposite ends of the same side magnet 33, where the two opposite ends refer to the two opposite ends distributed along the long side. In order to facilitate the limiting of the side magnet 33, a notch can be provided on the side magnet 33, and the columnar structure formed by the positioning boss 141 and the mounting portion 15 abuts against the notch, so that the displacement of the side magnet 33 in the length direction and the width direction can be limited at the same time.

[0095] In order to further improve the connection stability of the mounting portion 15, in one embodiment, a rubber grabbing boss 142 is further provided on the annular washer 14 and at the edge of the clearance notch 144, the rubber grabbing boss 142 extends toward the direction of the edge magnet 33, and the rubber grabbing boss 142 is wrapped in the mounting portion 15. Optionally, a plurality of the rubber grabbing bosses 142 are provided on the annular washer 14, and the plurality of the rubber grabbing bosses 142 and the positioning bosses 141 are distributed at intervals along the circumference of the annular washer 14, so that the connection area between the mounting portion 15 and the annular washer 14 is increased at multiple positions along the circumference of the annular washer 14.

[0096] Please refer to Fig.11 In one embodiment, a rubber grabbing groove 143 is further provided on the annular washer 14. The rubber grabbing groove 143 is arranged adjacent to the edge of the clearance gap 144. The mounting portion 15 fills the rubber grabbing groove 143, so that a mutually interlocking structure is formed between the mounting portion 15 and the rubber grabbing groove 143, thereby greatly improving the connection effect between the mounting portion 15 and the annular washer 14.

[0097] The glue grabbing groove 143 is located on the surface of the annular washer 14 facing the metal ring 13, and penetrates the edge of the clearance gap 144. In this way, when the mounting portion 15 is formed by injection molding, the injection plastic can flow into the glue grabbing groove 143 between the annular washer 14 and the metal ring 13, thereby increasing the contact area between the mounting portion 15 and the annular washer 14 and the metal ring 13 at the same time, and effectively improving the fixing effect between the three. Of course, in other embodiments, the glue grabbing groove 143 can be set on the hole wall of the clearance gap 144, or on the surface of the annular washer 14 facing the magnetic guide yoke 20.

[0098] Please refer to Figure 8 , Fig. 9 and Fig.14 In order to further increase the connection area between the mounting portion 15 and the metal ring 13, in one embodiment, the mounting area 131 is further provided with a gripping hole 132, and the mounting portion 15 fills the gripping hole 132. Optionally, the diameter of the gripping hole 132 at one end close to the annular washer 14 is smaller than the diameter at the other end. For example, the gripping hole 132 is a stepped hole, so that after the mounting portion 15 is formed, the mounting portion 15 located in the gripping hole 132 abuts against the stepped surface of the stepped hole, thereby limiting the mounting portion 15 from being separated in the direction close to the annular washer 14. In addition, the gripping hole 132 can also be a gradually expanding hole.

[0099] Please refer to Figure 8 and Fig.10 The metal ring 13 includes a first annular body 133 and a plurality of first side washers 134, and the plurality of first side washers 134 are distributed at intervals along the circumference of the first annular body 133 on the inner edge thereof. The annular washer 14 includes a second annular body 145 and a plurality of second side washers 146, and the plurality of second side washers 146 are distributed at intervals along the circumference of the second annular body 145 on the inner edge thereof. The plurality of first side washers 134 and the plurality of second side washers 146 are arranged one by one in correspondence, and the corresponding two first side washers 134 and the second side washers 146 are arranged in a stacked manner, and the first annular body 133 and the second annular body 145 are arranged in a stacked manner.

[0100] For the square sound-emitting device, the first annular body 133 and the second annular body 145 are square annular structures, and a first side washer 134 is provided on each side of the first annular body 133, and a second side washer 146 is provided on each side of the second annular body 145. Of course, the number and structure of the first side washers 134 and the second side washers 146 can be set corresponding to the side magnets 33 and be consistent with the side magnets 33.

[0101] In this embodiment, the side magnetic conductive plate of the sound-emitting device is formed by stacking the first side washer 134 and the second side washer 146, which can ensure that the side magnetic conductive plate has a larger thickness, making the magnetic conductive effect of the side magnetic conductive plate more significant and the magnetic induction intensity of the magnetic gap stronger.

[0102] Please refer to Figures 15 to 19 In one embodiment, the housing 10 includes a plastic shell 16 and a metal washer 17 . The plastic shell 16 and the metal washer 17 are both ring-shaped, and the plastic shell 16 and the metal washer 17 are integrally injection molded.

[0103] The metal washer 17 includes a third annular body and a third side washer. The third side washer is disposed on the inner circumference of the third annular body. Similarly, a plurality of third side washers may be disposed on the inner circumference of the third annular body.

[0104] The plastic shell 16 substantially wraps the third annular body, and the third side washer is exposed outside the plastic shell 16. A retaining wall 113 is formed on the plastic shell 16. By arranging the retaining wall 113 on the plastic shell 16, it is convenient for the retaining wall 113 to be integrally injection molded.

[0105] 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: include: Magnetic yoke; A shell extending along the edge of the magnetic yoke in a ring shape, wherein a leakage port is formed in a gap between the shell and the magnetic yoke; as well as, A metal mesh covers the leakage opening, and the metal mesh is provided with a plurality of air holes at positions corresponding to the leakage opening; The housing comprises a shell part and a mounting part, wherein the shell part is a metal part, and the shell part extends along the outer edge of the magnetic yoke to be annular, and a clearance gap is provided on the surface of the shell part facing the magnetic yoke, and the clearance gap penetrates the outer edge of the shell part outwardly; the mounting part is arranged in the clearance gap, and the mounting part is a plastic part, and is integrally injection-molded with the shell part; The shell portion includes a stacked metal ring and an annular washer, the metal ring is connected to the edge of the diaphragm, the annular washer is arranged on the side magnet, a portion of the outer edge of the annular washer is provided with the clearance notch, the metal ring has a mounting area exposed from the clearance notch, the mounting portion is arranged in the mounting area, and the mounting area is further provided with a glue grabbing hole; A rubber grabbing boss is also arranged on the annular washer and at the edge of the clearance gap. The rubber grabbing boss extends toward the side magnet and is wrapped in the mounting portion.

2. The sound generating device according to claim 1, characterized in that: The metal mesh comprises a covering section and a connecting section, wherein the connecting section is connected to the surface of the magnetic yoke facing away from the outer shell, the covering section covers the leakage port, and a plurality of air holes are formed on the covering section.

3. The sound-generating device according to claim 2, characterized in that: A clearance groove is formed on the surface of the magnetic yoke facing away from the shell, and the connecting section is located in the clearance groove.

4. The sound-generating device according to claim 2, characterized in that: The connecting section is welded or bonded to the magnetic yoke.

5. The sound generating device according to claim 2, characterized in that: The sound-generating device further comprises a magnetic circuit system and a vibration system, wherein the magnetic circuit system comprises a central magnet and side magnets arranged around the central magnet, and the interval between the central magnet and the side magnets constitutes a magnetic gap; The vibration system includes a diaphragm, a voice coil and a support plate, wherein the voice coil extends into the magnetic gap; the support plate is located at one end of the voice coil close to the magnetic yoke, and the support plate is electrically connected to the voice coil; A clearance hole is provided on the magnetic yoke and corresponds to the support piece, and the connecting section covers the clearance hole.

6. The sound generating device according to claim 5, characterized in that: The sound-generating device is square in shape, and each of the four corners of the sound-generating device is provided with a support sheet, and each of the four corners of the magnetic yoke is provided with a corresponding clearance hole.

7. The sound generating device according to claim 1, characterized in that: An inserting notch is provided on the shell and on the hole wall of the leakage port, and the metal mesh is inserted into the inserting notch.

8. The sound generating device according to claim 1, characterized in that: A plurality of retaining walls are extended from the edge of at least one of the magnetic yoke and the shell in a direction close to each other, and the retaining wall abuts against the other one, wherein the space between two adjacent retaining walls constitutes the leakage port.

9. The sound generating device according to claim 8, characterized in that: A plurality of groups of positioning structures are formed between the magnetic yoke and the outer shell, and each group of the positioning structures includes two baffle walls arranged on the outer shell, and one baffle wall arranged on the magnetic yoke, wherein the baffle wall on the magnetic yoke is inserted between the two baffle walls on the outer shell; and the interval between two adjacent groups of the positioning structures constitutes the leakage port.

10. The sound generating device according to claim 1, characterized in that: The sound-generating device is square in shape, and each of the two short sides of the sound-generating device is provided with a leakage port, and each leakage port corresponds to one of the metal meshes.

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

12. The sound generating device according to any one of claims 1 to 11, characterized in that: The shell comprises a plastic shell and a metal washer. Both the plastic shell and the metal washer are ring-shaped. The plastic shell and the metal washer are integrally injection-molded.

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