Sound production device and electronic device

Abstract

The utility model belongs to sound production device technical field discloses a kind of sound production device and electronic equipment, and sound production device includes shell, sound production module and connecting gum body.The shell is provided with stop portion;Sound production module is provided with multiple groups along first direction;Each group of sound production module includes vibration system and magnetic circuit system, and vibration system includes diaphragm assembly and voice coil connected to diaphragm assembly in one end;Magnetic circuit system has magnetic gap, and the end of voice coil away from diaphragm assembly is located in magnetic gap, and voice coil cooperates with magnetic circuit system to drive diaphragm assembly vibration;Magnetic circuit system has avoidance notch, and stop portion is abutted to the circumferential side surface of magnetic circuit system, and cover is set in avoidance notch, and stop portion, shell, diaphragm assembly and magnetic circuit system mutually cooperate to form sealed cavity;First direction is the length direction of shell.The sound production device and electronic equipment provided by the utility model have higher connection reliability.

Description

Technical Field

[0001] This utility model relates to the field of sound-generating devices, and in particular to a sound-generating device and electronic equipment. Background Technology

[0002] Electronic devices such as mobile phones, computers, and smart wearable devices are all equipped with sound-generating devices to provide a better user experience. For electronic devices with temples, such as smart glasses, the sound-generating device is usually located on the temple. In related technologies, in order to install the large sound-generating device, the width and thickness of the temple are usually made large, which makes it impossible to utilize the space along the length of the temple.

[0003] In order to make use of the space along the length of the temple, the sound-generating device can include two individual sound-generating devices, which are arranged along the length of the temple. This ensures that the size of each individual sound-generating device is not too large, thereby reducing the need for excessive width and thickness of the temple and maintaining the appearance of the smart glasses.

[0004] In related technologies, the sound-generating device includes a support frame and a vibration system and a magnetic circuit system connected to the support frame. The vibration system includes components such as a diaphragm and a voice coil, while the magnetic circuit system includes components such as a magnetic yoke and a main magnet. The diaphragm is fixed to the support frame with a colloid, resulting in a high connection strength. The four edges of the magnetic yoke are bent towards the diaphragm to form a bend, and the bend is spaced apart from the main magnet to form a magnetic gap. One end of the voice coil is connected to the diaphragm, and the other end is located in the magnetic gap. The end face of the bend is connected to the support frame. However, due to the small area of ​​the end face of the bend, the connection between the bend and the support frame is prone to failure. When the sound-generating device vibrates due to an impact, the magnetic yoke is easily dislodged from the support frame by lateral movement. Therefore, the connection strength between the magnetic circuit system and the support frame needs further improvement. Utility Model Content

[0005] The first objective of this application is to provide a sound-generating device that reduces the risk of relative movement between the housing and the magnetic circuit system, and improves the connection strength and reliability between the housing and the magnetic circuit system.

[0006] The second objective of this application is to provide an electronic device with high reliability.

[0007] Based on the above concept, the technical solution adopted in this application is:

[0008] The housing is equipped with a stop;

[0009] The sound-generating module is provided in multiple groups along a first direction; each sound-generating module includes a vibration system and a magnetic circuit system. The vibration system includes a diaphragm assembly and a voice coil connected to the diaphragm assembly at one end; the magnetic circuit system has a magnetic gap, and the end of the voice coil away from the diaphragm assembly is located in the magnetic gap. The voice coil cooperates with the magnetic circuit system to drive the diaphragm assembly to vibrate; the magnetic circuit system has a clearance notch, and a stop part abuts against the circumferential side of the magnetic circuit system and covers the clearance notch. The stop part, the housing, the diaphragm assembly, and the magnetic circuit system cooperate with each other to form a sealed cavity; the first direction is the length direction of the housing.

[0010] In one embodiment, each magnetic circuit system is provided with multiple stops at intervals around its periphery;

[0011] Alternatively, each magnetic circuit system has a stop on both sides in the second direction; the second direction is the width direction of the housing.

[0012] In one embodiment, the magnetic circuit system includes a first magnetic yoke and a main magnet disposed on the first magnetic yoke, the first magnetic yoke and the main magnet forming a magnetic gap; the first magnetic yoke is provided with an avoidance notch, a stop portion abuts against the first magnetic yoke, and the stop portion, the housing, the diaphragm assembly and the first magnetic yoke cooperate with each other to form a sealed cavity.

[0013] In one embodiment, the first magnetic yoke includes a magnetic yoke body and a first magnetic yoke portion and a second magnetic yoke portion disposed on the same side of the magnetic yoke body; a main magnet is disposed on the magnetic yoke body, and the first magnetic yoke portions are spaced apart on both sides of the main magnet in a second direction, with the main magnet and the first magnetic yoke portions spaced apart to form a magnetic gap; at least one end of the magnetic yoke body in the first direction is connected to the second magnetic yoke portion; a stop portion abuts against the second magnetic yoke portion;

[0014] The second yoke portion is provided with a clearance notch; or, the first yoke portion and the second yoke portion are spaced apart to form a clearance notch.

[0015] In one embodiment, the first magnetic yoke is provided with a perforation communicating with a sealed cavity, and the sound-generating device further includes a damping mesh fabric installed in the perforation.

[0016] In one embodiment, the first magnetic yoke of the plurality of sound-generating modules is an integral structure; or, the first magnetic yoke of the plurality of sound-generating modules is a separate structure.

[0017] In one embodiment, the magnetic circuit system includes a second magnetic yoke, a main magnet, and a secondary magnet. Secondary magnets are spaced apart on both sides of the main magnet in a second direction, forming a magnetic gap between the main magnet and the secondary magnets. The main magnet is connected to the second magnetic yoke, and the secondary magnets are connected to the second magnetic yoke and / or the housing. An clearance notch is provided in the second magnetic yoke. A stop portion abuts against the second magnetic yoke. The stop portion, housing, diaphragm assembly, second magnetic yoke, and secondary magnets cooperate to form a sealed cavity.

[0018] The second direction is the width direction of the shell.

[0019] In one embodiment, the second magnetic yoke is provided with a folded edge that bends toward the diaphragm assembly, and a stop portion abuts against the folded edge;

[0020] The folded edge is provided with a clearance notch; or, the folded edge and the auxiliary magnet are spaced apart to form a clearance notch.

[0021] In one embodiment, the stop portion abuts against the surface of the folded edge that is away from the sealing cavity.

[0022] In one embodiment, the second magnetic yoke has an extension extending along a second direction, and the extension is correspondingly disposed on the secondary magnet, which is disposed on the corresponding extension.

[0023] In one embodiment, the second magnetic yoke is provided with a perforation; the second magnetic yoke, the housing, the auxiliary magnet and the diaphragm assembly cooperate to form a sealed cavity;

[0024] The perforation connects to the sealed cavity, and the sound-generating device also includes a damping mesh installed in the perforation.

[0025] In one embodiment, a glue-filled groove is formed between the housing and the magnetic circuit system, and a connecting glue is disposed in the glue-filled groove to connect the housing and the magnetic circuit system.

[0026] In one embodiment, a semi-groove is provided on the inner side of the housing, and the semi-groove cooperates with the surface of the magnetic circuit system to form a glue-containing groove.

[0027] In one embodiment, the diaphragm assembly is connected to the end face of one end of the housing, and the groove of the adhesive groove is located on the end face of the other end of the housing.

[0028] Electronic devices, including the sound-generating devices described above.

[0029] The beneficial effects of this application are:

[0030] The housing is provided with a stop portion, which can be used to cooperate with the housing, diaphragm assembly and magnetic circuit system to form a sealed cavity. It can also be used to abut against the circumferential side of the magnetic circuit system. When the sound generating device is impacted, the stop portion can restrict the magnetic circuit system, thereby reducing the risk of the magnetic circuit system moving relative to the housing. This reduces the risk of the connection between the housing and the magnetic circuit system breaking and failing, ensuring the connection strength between the housing and the magnetic circuit system and improving the connection reliability between the housing and the magnetic circuit system.

[0031] Electronic devices have high connection reliability and long service life. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.

[0033] Figure 1 This is a first structural schematic diagram of the first type of sound-generating device provided in the embodiments of this application;

[0034] Figure 2 This is a second structural schematic diagram of the first sound-generating device provided in the embodiments of this application;

[0035] Figure 3 This is an exploded view of the first sound-generating device provided in the embodiments of this application;

[0036] Figure 4 This is a top view of the first sound-generating device provided in the embodiments of this application;

[0037] Figure 5 yes Figure 4 The AA section view shown;

[0038] Figure 6 yes Figure 4 The BB section view shown;

[0039] Figure 7 This is a schematic diagram of the sound-generating device provided in the embodiments of this application, without showing the magnetic structure;

[0040] Figure 8 This is a schematic diagram of the shell structure provided in the embodiments of this application;

[0041] Figure 9 This is a schematic diagram of the first structure of the centering support provided in the embodiments of this application;

[0042] Figure 10 This is a schematic diagram of the second structure of the centering support provided in the embodiments of this application;

[0043] Figure 11 yes Figure 4 The shown is a CC section view;

[0044] Figure 12 This is a schematic diagram of the structure of the second sound-generating device provided in the embodiments of this application;

[0045] Figure 13 This is a partial structural schematic diagram of the second type of sound-generating device provided in the embodiments of this application;

[0046] Figure 14This is a schematic diagram of the structure of the third sound-generating device provided in the embodiments of this application;

[0047] Figure 15 This is an exploded view of the third sound-generating device provided in the embodiments of this application;

[0048] Figure 16 This is a schematic diagram of the centering support plate of the third sound-generating device provided in the embodiments of this application.

[0049] In the picture:

[0050] 10. Housing; 101. Receiving groove; 102. First limiting part; 103. Half groove; 104. Stop part; 105. Support boss; 106. Support plate groove; 107. Crossbeam; 100. Sealing cavity;

[0051] 20. Sound-generating module; 1. Vibration system; 11. Diaphragm assembly; 111. Dome; 112. Diaphragm structure; 12. Voice coil; 2. Magnetic circuit system; 2a. Magnetic structure; 21. First yoke; 211. Perforation; 2111. Large hole section; 2112. Small hole section; 212. Through hole; 213. Magnetic yoke body; 214. First yoke part; 215. Second yoke part; 2151. 22. Avoidance notch; 23. Main magnet; 24. Magnetic gap; 25. Secondary magnet; 26. First magnetic conductive sheet; 27. Second magnetic yoke; 28. Extension; 29. ​​Folded edge; 20. Centering support; 21. Support body; 22. First connecting part; 23. Transition part; 24. Bending section; 25. Second connecting part; 36. Positioning notch; 37. Limiting groove; 38. Avoidance groove; 39. Through hole;

[0052] 30. Damping mesh fabric; 40. Adhesive tank; 50. Connecting adhesive; 60. Conductive coating;

[0053] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0054] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not all of them.

[0055] It should be understood that the phrase "an embodiment" or "one embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in one embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0056] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0057] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0058] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0059] In the description of this embodiment, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0060] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0061] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0062] This embodiment provides a sound-generating device that reduces the risk of relative movement between the housing and the magnetic circuit system, and improves the connection strength and reliability between the housing and the magnetic circuit system.

[0063] For example, such as Figures 1 to 16 As shown, the sound-generating device includes a housing 10 and a sound-generating module 20. The housing 10 serves as the supporting structure for the entire sound-generating device, and the sound-generating module 20 is disposed on the supporting structure.

[0064] For ease of description, in this embodiment, the length direction of the housing 10 is referred to as the first direction X, the width direction of the housing 10 is referred to as the second direction Y, and the height direction of the housing 10 is referred to as the third direction Z. The length of the housing 10 is greater than its width and height. For example, the sound-generating device can be rectangular to facilitate its application in electronic devices that have a large installation space in the length direction but a small installation space in the width and thickness directions.

[0065] In some alternative embodiments, the housing 10 is annular, which can also be understood as the housing 10 having mounting holes extending through the upper and lower surfaces along the height direction. Thus, the annular housing 10 can be used to accommodate part of the structure of the sound-generating module 20.

[0066] For example, multiple sets of sound-emitting modules 20 can be provided, and each set of sound-emitting modules 20 can emit sound independently. Multiple sets of sound-emitting modules 20 can be arranged along the first direction X. In this way, multiple sound-emitting modules 20 of the sound-emitting device can be arranged along the first direction X, and the space required in the second direction Y and the third direction Z is small while having multiple sound sources.

[0067] In one embodiment, the multiple sound-generating modules 20 can be independent of each other, that is, each sound-generating module 20 is individually fixed to the housing 10.

[0068] In other embodiments, the multiple sound-generating modules 20 may not be relatively independent, but may have a connection or a shared relationship. For example, the components of the sound-generating module 20 may be connected to or integrally formed with the corresponding components of the adjacent sound-generating module 20. The specifics can be adjusted according to actual needs, and this embodiment does not limit this.

[0069] For example, such as Figure 2 and Figure 3As shown, this embodiment provides a sound-generating module 20, which includes a vibration system 1 and a magnetic circuit system 2. The vibration system 1 and the magnetic circuit system 2 can cooperate with each other to vibrate and generate sound.

[0070] In one embodiment, such as Figure 3 As shown, the vibration system 1 includes a diaphragm assembly 11 and a voice coil 12 connected to the diaphragm assembly 11 at one end. The circumferential edge of the diaphragm assembly 11 is connected to the housing 10, and the voice coil 12 can be electrically connected to an external circuit. The diaphragm assembly 11 can vibrate and produce sound under the drive of the voice coil 12.

[0071] In some optional embodiments, the diaphragm assembly 11 may include a dome 111 and a diaphragm structure 112. The diaphragm structure 112 is connected to the circumferential edge of the dome 111, and a voice coil 12 is connected to the dome 111. The voice coil 12 drives the dome 111 to vibrate, thereby driving the diaphragm structure 112 to vibrate through the dome 111. The circumferential edge of the diaphragm structure 112 is connected to the housing 10, for example, the circumferential edge of the diaphragm structure 112 is connected to the end face of one end of the housing 10 in the height direction.

[0072] In some alternative embodiments, such as Figure 3 As shown, the diaphragm assemblies 11 of multiple sound-generating modules 20 can be connected into one unit.

[0073] In one implementation, such as Figure 3 As shown, the magnetic circuit system 2 has a clearance notch 2151, and the housing 10 is provided with a stop portion 104. In some optional embodiments, the stop portion 104 is provided on the end face of the housing 10 opposite to the diaphragm assembly 11. The stop portion 104 abuts against the magnetic circuit system 2 to limit the magnetic circuit system 2, reduce the risk of the magnetic circuit system 2 moving relative to the housing 10, and improve the fixing strength of the magnetic circuit system 2. In this embodiment, the stop portion 104 also covers the clearance notch 2151, so that the stop portion 104, the housing 10, the diaphragm assembly 11, and the magnetic circuit system 2 can cooperate with each other to form a relatively sealed cavity 100. It can be seen that the stop portion 104 in this embodiment is not only used to limit the magnetic circuit system 2, but also to form a relatively sealed cavity 100, which has a high utilization rate.

[0074] In some alternative embodiments, the stop portion 104 abuts against the circumferential side of the magnetic circuit system 2 to restrict the movement of the magnetic circuit system 2 relative to the housing 10 along the length and / or width directions of the housing 10.

[0075] The sound-generating device provided in this embodiment has a stop portion 104 provided in the housing 10. The stop portion 104 can be used to cooperate with the housing 10, the diaphragm assembly 11 and the magnetic circuit system 2 to form a sealed cavity 100. It can also be used to abut against the circumferential side of the magnetic circuit system 2. When the sound-generating device is impacted, the stop portion 104 can restrict the magnetic circuit system 2, thereby reducing the risk of the magnetic circuit system 2 moving relative to the housing 10. This reduces the risk of the connection between the housing 10 and the magnetic circuit system 2 breaking and failing, ensuring the connection strength between the housing 10 and the magnetic circuit system 2, and improving the connection reliability between the housing 10 and the magnetic circuit system 2.

[0076] In some alternative embodiments, such as Figure 15 As shown, multiple stop portions 104 can be provided, with multiple stop portions 104 spaced apart on the periphery of each magnetic circuit system 2. That is, each magnetic circuit system 2 is provided with multiple stop portions 104, and the multiple stop portions 104 are spaced apart along the circumference of the magnetic circuit system 2. This arrangement allows the multiple stop portions 104 to limit the position of the magnetic circuit system 2 in both the length and width directions of the housing 10, further reducing the risk of movement of the magnetic circuit system 2 relative to the housing 10. For example, as... Figure 15 As shown, each corner of the magnetic circuit system 2 has a clearance notch 2151, and the stop part 104 is correspondingly provided with the clearance notch 2151 and can cover the corresponding clearance notch 2151 to form a relatively sealed sealing cavity 100.

[0077] In other alternative embodiments, each magnetic circuit system 2 may have a stop portion 104 abutting on both sides in the second direction Y, so that the stop portion 104 can restrict the movement of the magnetic circuit system 2 in the second direction Y. The limiting of the magnetic circuit system 2 in the first direction X can be achieved by other components.

[0078] It is understandable that the stop portion 104 can also limit the magnetic circuit system 2 in both the first direction X and the second direction Y, for example, as... Figure 7 As shown, the stop portion 104 is provided at the corner of the magnetic circuit system 2, for example, the stop portion 104 is arc-shaped. With this configuration, the stop portion 104 includes a portion extending in the first direction X and a portion extending in the second direction Y. Both the portion of the stop portion 104 extending in the first direction X and the portion extending in the second direction Y abut against the circumferential side of the magnetic circuit system 2, thereby achieving the limiting and fixing of the magnetic circuit system 2 in the first direction X and the second direction Y.

[0079] In this embodiment, the magnetic circuit system 2 is connected to the housing. To further improve the connection strength between the magnetic circuit system 2 and the housing 10, such as... Figure 5As shown, a glue-containing groove 40 is formed between the housing 10 and the magnetic circuit system 2, and a connecting glue 50 is provided in the glue-containing groove 40, which connects the housing 10 and the magnetic circuit system 2.

[0080] In at least one possible embodiment, the diaphragm assembly 11 is connected to the end face of one end of the housing 10, and the opening of the adhesive groove 40 is located on the end face of the other end of the housing 10. This arrangement facilitates operations such as adhesive injection without affecting the connection between the diaphragm assembly 11 and the housing 10, thereby reducing the manufacturing difficulty of the sound-generating device.

[0081] The sound-generating device provided in this embodiment, by providing an adhesive reservoir 40, can increase the amount of adhesive 50 used to bond the housing 10 and the magnetic circuit system 2, thereby improving the bonding strength between the housing 10 and the magnetic circuit system 2. Furthermore, the adhesive reservoir 40 also facilitates the placement of the adhesive 50 in a gel-like state, eliminating the need for solid adhesive and making the connection between the housing 10 and the magnetic circuit system 2 more flexible.

[0082] In some alternative embodiments, please continue to refer to Figure 3 The magnetic circuit system 2 includes a magnetic structure 2a and a main magnet 22 disposed on the magnetic structure 2a. Both the magnetic structure 2a and the main magnet 22 are made of magnetic materials. The magnetic structure 2a is connected to the housing 10, and, as... Figure 5 As shown, the magnetic structure 2a, the diaphragm assembly 11, and the housing 10 are interconnected and cooperate to form a sealed cavity 100. The main magnet 22 and the voice coil 12 are both located in the sealed cavity 100. The sealed cavity 100 contains air, which causes the diaphragm assembly 11 to vibrate and drive the air to produce sound.

[0083] It should be noted that the sealed cavity 100 in this embodiment is a relatively sealed cavity. The diaphragm assembly 11 and the housing 10 are connected by adhesive bonding, and there is no gap between the diaphragm assembly 11 and the housing 10. The magnetic structure 2a and the housing 10 can be interlocked, so that there can be a very small gap or even no gap between the magnetic structure 2a and the housing 10.

[0084] like Figure 5 As shown, the magnetic circuit system 2 has a magnetic gap 23. One end of the voice coil 12, away from the diaphragm assembly 11, is located in the magnetic gap 23. The voice coil 12 cooperates with the magnetic circuit system 2 to drive the diaphragm assembly 11 to vibrate, thereby producing sound from the sound-generating module 20. Exemplarily, the magnetic circuit system 2 and the main magnet 22 are spaced apart to form the magnetic gap 23.

[0085] Please see Figure 3The magnetic structure 2a is provided with a through hole 211 that connects to the sealed cavity 100, and a damping mesh 30 is installed in the through hole 211. By providing the through hole 211 and installing the damping mesh 30 in the through hole 211, the gas inside the sealed cavity 100 can be discharged through the damping mesh 30, and the air outside the sealed cavity 100 can also enter the sealed cavity 100 through the damping mesh 30.

[0086] It should be noted that the damping mesh 30 refers to a fabric with mesh openings. Different mesh density and size will result in different acoustic impedances in the damping mesh 30. These different acoustic impedances will manifest as different damping coefficients in the sound-generating device. Thus, by locally suppressing the amplitude near the resonant frequency point, the frequency response curve can be made flatter, thereby reducing the corresponding total harmonic distortion (THD). Total harmonic distortion is an important parameter for measuring the sound quality and other performance characteristics of a sound-generating device, representing the degree of distortion generated during the transmission or playback of the sound signal. Reduced total harmonic distortion can significantly improve sound quality, making the sound purer and more natural. In the design of a sound-generating device, the use of damping mesh 30 can suppress amplitude fluctuations near the resonant frequency point, thereby effectively reducing harmonic distortion, lowering total harmonic distortion, and improving the overall sound quality performance of the sound-generating device.

[0087] The sound-generating device provided in this embodiment has a diaphragm assembly 11, a housing 10, and a magnetic structure 2a that can cooperate to form a sealed cavity 100. The magnetic structure 2a is provided with a perforation 211, and a damping mesh 30 is installed in the perforation 211. The damping mesh 30 has a certain damping, so that the gas in the sealed cavity 100 will be subject to a certain resistance when it is discharged. On the one hand, it can control the leakage of the sound-generating device; on the other hand, it will not cause the gas volume in the sealed cavity 100 to increase or decrease sharply, thereby improving the stability of the gas pressure in the sealed cavity 100. This achieves the purpose of suppressing amplitude fluctuations near the resonance frequency point, effectively reducing harmonic distortion, and thus effectively improving the acoustic performance of the sound-generating device.

[0088] In some optional embodiments, one or more perforations 211 may be provided on the magnetic structure 2a, which can be adjusted according to requirements, and this embodiment does not limit this.

[0089] When the magnetic structure 2a is provided with multiple perforations 211, the multiple perforations 211 are spaced apart along the first direction X. With this arrangement, damping mesh fabrics 30 with different mesh densities can be provided in the perforations 211 according to the relative position relationship between the perforations 211 and the sealing cavity 100, thereby adjusting the acoustic resistance of the perforations 211, pre-forming an airflow difference, suppressing the swaying of the sound-generating module 20 caused by the asymmetry of airflow in the sealing cavity 100 of the sound-generating device along the first direction X, reducing the generation of noise in the sound-generating device, and making the acoustic performance of the sound-generating device better.

[0090] In some optional embodiments, when the magnetic structure 2a is provided with a plurality of perforations 211, the plurality of perforations 211 are symmetrically arranged on the magnetic structure 2a along a symmetry axis perpendicular to the first direction X. This arrangement can further reduce the risk of the sound-generating module 20 swaying due to airflow asymmetry, further reduce the generation of noise, and further improve acoustic performance.

[0091] In at least one implementation, such as Figure 2 As shown, the magnetic structure 2a is provided with a through hole 212. The through hole 212 can make the magnetic structure 2a lighter, thereby making the overall weight of the sound-generating device lighter, which can be used in electronic devices with high weight requirements.

[0092] It should be noted that when the magnetic structure 2a has a through hole 212, the main magnet 22 is connected to the magnetic structure 2a and seals the through hole 212 to prevent gas in the sealed cavity 100 from leaking through the through hole 212 and affecting the sound quality. Specifically, the main magnet 22 sealing the through hole 212 means that the orthographic projection of the main magnet 22 on the magnetic structure 2a completely covers the through hole 212, or it can be understood as the main magnet 22 covering the through hole 212, so that the gas in the sealed cavity 100 will not be discharged through the through hole 212.

[0093] In one embodiment, when the magnetic structure 2a is provided with a through hole 212, a through hole 211 is provided on at least one side of the through hole 212 in the first direction X. The through hole 212 and the through hole 211 are spaced apart along the first direction X, so that the arrangement of the through hole 212 does not affect the position and size of the through hole 211, thereby making the structure of the through hole 211 more flexible.

[0094] In an optional embodiment, such as Figure 6As shown, the perforation 211 is a stepped hole, and it includes a large hole section 2111 and a small hole section 2112. The diameter of the large hole section 2111 is larger than that of the small hole section 2112, and the large hole section 2111 and the small hole section 2112 are coaxially arranged. The damping mesh 30 is disposed in the large hole section 2111. This arrangement facilitates the installation of the damping mesh 30 in the perforation 211. For example, the damping mesh 30 can be glued to the stepped surface of the stepped hole, resulting in a larger connection area between the damping mesh 30 and the magnetic structure 2a, thus improving the reliability of the connection between the damping mesh 30 and the magnetic structure 2a.

[0095] In one embodiment, the thickness of the damping mesh 30 is less than or equal to the length of the large-aperture section 2111. This arrangement ensures that the damping mesh 30 does not additionally increase the height of the magnetic structure 2a, and consequently, does not increase the overall height of the sound-generating device. This allows the sound-generating device to be used in narrower spaces. Furthermore, by protecting the damping mesh 30 with the large-aperture section 2111, the risk of other structures scraping the damping mesh 30 off the magnetic structure 2a is reduced, resulting in higher reliability.

[0096] In order to improve the connection strength between the housing 10 and the magnetic circuit structure, in this embodiment, the housing 10 may be provided with a limiting structure for limiting the magnetic circuit structure.

[0097] In at least one implementation, such as Figure 7 and Figure 8 As shown, the housing 10 is provided with a first limiting part 102. The diaphragm assembly 11 is connected to the end face of one end of the housing 10, and the first limiting part 102 is provided on the end face of the other end of the housing 10. That is, the end of the housing 10 away from the diaphragm assembly 11 is provided with the first limiting part 102. The magnetic structure 2a abuts against the first limiting part 102, so that the first limiting part 102 restricts the movement of the magnetic structure 2a relative to the housing 10, thereby ensuring the reliability and stability of the connection between the housing 10 and the magnetic structure 2a. On the one hand, it reduces the risk of connection failure between the housing 10 and the magnetic structure 2a, and on the other hand, it avoids the generation of a large gap between the magnetic structure 2a and the housing 10 due to relative movement.

[0098] Optionally, the first limiting part 102 may contact the outer wall surface of the magnetic structure 2a to restrict the movement of the magnetic structure 2a.

[0099] In one implementation, such as Figure 8As shown, multiple first limiting portions 102 can be provided. First limiting portions 102 can be provided on both sides of the magnetic structure 2a in the first direction X to restrict the movement of the magnetic structure 2a relative to the housing 10 in the first direction X. First limiting portions 102 can also be provided on both sides of the magnetic structure 2a in the second direction Y to restrict the movement of the magnetic structure 2a relative to the housing 10 in the second direction Y. The cooperation of multiple first limiting portions 102 can further reduce the risk of movement of the magnetic structure 2a relative to the housing 10, improve the strength of fixing the magnetic structure 2a, and also make the sealing cavity 100 more sealed, ensuring the acoustic performance of the sound-generating device.

[0100] It is understandable that the shape of the first limiting part 102 can match the shape of the magnetic structure 2a so that the contact area between the first limiting part 102 and the magnetic structure 2a can be larger, thereby improving the effect of limiting the magnetic structure 2a.

[0101] In at least one embodiment, such as Figure 7 or Figure 8 As shown, the stop portion 104 can abut against the magnetic structure 2a to limit the position of the magnetic structure 2a. It can be seen that the stop portion 104 can cooperate with the first limiting portion 102 to limit the position of the magnetic structure 2a relative to the housing 10, thereby further reducing the risk of movement of the magnetic structure 2a relative to the housing 10.

[0102] In some alternative embodiments, the stop portion 104 and the first limiting portion 102 are spaced apart in the circumferential direction of the housing 10. The number of stop portions 104 can be one or more, and this embodiment is not limited in this respect. The shape of the stop portion 104 can match the shape of the magnetic structure 2a to better abut against the magnetic structure 2a.

[0103] For example, such as Figure 3 As shown, the magnetic structure 2a has a clearance notch 2151, which communicates with the sealed cavity 100. In this case, gas inside the sealed cavity 100 will be discharged through the clearance notch 2151, affecting sound quality. In this embodiment, the housing 10 is provided with a stop portion 104 that cooperates with the clearance notch 2151. The stop portion 104 covers the clearance notch 2151 from the outer surface of the magnetic structure 2a, allowing the magnetic structure 2a, the diaphragm assembly 11, and the housing 10 to cooperate and form the sealed cavity 100. By providing the stop portion 104, the clearance notch 2151 of the magnetic structure 2a can be filled by the stop portion 104, minimizing the gap between the magnetic structure 2a and the housing 10, thereby improving the sound quality of the sound-generating device.

[0104] In some alternative embodiments, when the stop portion 104 seals the clearance notch 2151, a sealing element (such as silicone, rubber or other materials) may be provided between the stop portion 104 and the magnetic structure 2a to form a seal between the magnetic structure 2a and the housing 10.

[0105] It is understandable that when there are multiple stop portions 104, not every stop portion 104 is covered at the clearance notch 2151. That is, among the multiple stop portions 104, some stop portions 104 may be covered at the clearance notch 2151, while other stop portions 104 may not be covered at the clearance notch 2151. This embodiment does not limit this.

[0106] In at least one possible implementation, in order to further improve the connection strength between the magnetic structure 2a and the housing 10, such as Figure 5 As shown, a groove 40 is formed between the housing 10 and the magnetic structure 2a. At this time, the adhesive 50 connects the housing 10 and the magnetic structure 2a. By providing the groove 40, the amount of adhesive 50 bonding the housing 10 and the magnetic structure 2a can be increased, thereby improving the bonding strength between the housing 10 and the magnetic structure 2a. Furthermore, the groove 40 also facilitates the placement of the adhesive 50 in a gel-like state, eliminating the need for solid adhesive and making the connection between the housing 10 and the magnetic structure 2a more flexible.

[0107] In at least one possible embodiment, a semi-groove 103 is provided on the inner side of the housing 10. The semi-groove 103 cooperates with the side of the first magnetic yoke 214 to form a glue-receiving groove 40. That is, in this embodiment, the glue-receiving groove 40 is a V-shaped groove or a wedge-shaped groove. By providing a semi-groove 103 on the housing 10, the glue-receiving groove 40 does not occupy the volume of the magnetic circuit structure, allowing the volume of the magnetic circuit structure to be larger. This, in turn, allows for a stronger magnetic field formed by the interaction between the magnetic circuit structure and the main magnet 22, thereby improving the acoustic performance of the sound-generating device.

[0108] In some alternative embodiments, the half-groove 103 extends to the end face of the housing 10 away from the diaphragm assembly 11. This arrangement allows the opening of the adhesive groove 40 to be located on the end face of the housing 10, thereby facilitating operations such as adhesive injection.

[0109] In at least one implementation, such as Figure 8As shown, a support boss 105 is provided on the inner side of the housing 10. At least a portion of the magnetic structure 2a extends into the housing 10 and is supported on the support boss 105. By providing the support boss 105, on the one hand, the assembly position of the housing 10 and the magnetic structure 2a can be ensured, so that the size of the formed sealing cavity 100 meets the requirements, and the housing 10 and the magnetic structure 2a can be assembled in place; on the other hand, when an adhesive groove 40 is provided between the housing 10 and the magnetic structure 2a, the support boss 105 is located at the end of the adhesive groove 40 away from the groove opening, so as to prevent the adhesive 50 in a gel state from falling into the sealing cavity 100.

[0110] The magnetic structure 2a can have various specific structures, which can be selected according to actual needs. This embodiment provides two magnetic structures 2a, and the specific structures of the two magnetic structures 2a are different.

[0111] In one type of magnetic structure 2a, the magnetic structure 2a is a single-piece structure. For example, as shown... Figures 1 to 11 As shown, the magnetic structure 2a includes a first magnetic yoke 21, which includes a magnetic yoke body 213 and first magnetic yoke portions 214 connected to the magnetic yoke body 213. The main magnet 22 has first magnetic yoke portions 214 spaced apart on both sides in the second direction Y. For example, two first magnetic yoke portions 214 are provided, spaced apart on both sides of the main magnet 22 in the second direction Y, that is, the first magnetic yoke portions 214 are spaced apart from the main magnet 22 in the second direction Y. A magnetic gap 23 is formed between the main magnet 22 and the first magnetic yoke portions 214. The magnetic yoke body 213 and the first magnetic yoke portions 214 are an integral structure, giving them a high connection strength. In this embodiment, the first magnetic yoke portions 214 are connected to the housing 10 to achieve the connection between the first magnetic yoke body 21 and the housing 10. In this embodiment, the main magnet 22 is fixedly connected to the magnetic yoke body 213.

[0112] In some optional embodiments, the first magnetic yoke 214 in this embodiment may be an integral structure. Of course, it is understood that the first magnetic yoke 214 may also be a split structure. For example, the first magnetic yoke 214 may be composed of multiple magnetic blocks spaced apart along the first direction X. This embodiment does not limit this.

[0113] In at least one possible implementation, when the magnetic structure 2a includes a first magnetic yoke 21, a through hole 211 is provided on the magnetic yoke body 213. A through hole 212 may be provided on the magnetic yoke body 213.

[0114] In some alternative embodiments, when the magnetic structure 2a includes a first magnetic yoke 21, a clearance notch 2151 is provided in the first magnetic yoke 21. A stop portion 104 abuts against the first magnetic yoke 21, and the stop portion 104, the housing 10, the diaphragm assembly 11, and the first magnetic yoke 21 cooperate to form a sealed cavity 100.

[0115] In some optional embodiments, when the magnetic structure 2a includes the first magnetic yoke 21, the specific location of the adhesive groove 40 between the housing 10 and the magnetic structure 2a can be between the housing 10 and the first magnetic yoke 214. That is, an adhesive groove 40 is formed between the housing 10 and the first magnetic yoke 214. In this case, the adhesive groove 40 can be used to increase the connection strength between the housing 10 and the first magnetic yoke 214.

[0116] In one possible implementation, when the magnetic structure 2a includes a first magnetic yoke 21, the end face of the first magnetic yoke portion 214 facing away from the magnetic yoke body 213 abuts against the support boss 105, so that the support boss 105 supports the entire magnetic structure 2a by supporting the first magnetic yoke portion 214.

[0117] In at least one possible implementation, such as Figure 3 As shown, the first magnetic yoke 21 includes a second magnetic yoke portion 215. The second magnetic yoke portion 215 and the first magnetic yoke portion 214 are located on the same side of the magnetic yoke body 213. The second magnetic yoke portion 215 is provided at least one end of the magnetic yoke body 213 in the first direction X. The second magnetic yoke portion 215 can be used to cooperate with the housing 10, thereby forming a relatively sealed cavity 100. By providing the second magnetic yoke portion 215, the height of the sealed cavity 100 can be greater than the height of the housing 10, thus allowing the size of the sealed cavity 100 to be larger. Furthermore, by providing the second magnetic yoke portion 215, the overall volume of the magnetic structure 2a can be increased, allowing the magnetic structure 2a and the main magnet 22 to form a stronger magnetic field.

[0118] It should be noted that the first magnetic yoke 214 and the second magnetic yoke 215 are connected to different sides of the magnetic yoke body 213, thereby making the first magnetic yoke body 21 form a semi-closed structure. Combined with the housing 10 and the diaphragm assembly 11, a relatively closed sealed cavity 100 can be obtained.

[0119] It should also be noted that the magnetic yoke body 213 may have a second magnetic yoke portion 215 at both ends in the first direction X, or the magnetic yoke body 213 may have a second magnetic yoke portion 215 at one end in the first direction X. The specific configuration can be adjusted according to the requirements.

[0120] In some alternative embodiments, the first magnetic yoke 214 may extend into the housing 10, and the second magnetic yoke 215 may extend into the housing 10. Alternatively, the second magnetic yoke 215 may not extend into the housing 10, but may abut against the end face of the housing 10 away from the diaphragm assembly 11, thus achieving mutual cooperation between the housing 10 and the housing 10.

[0121] In one possible implementation, such as Figure 3 As shown, the dimension of the first magnetic yoke 214 in the third direction Z is larger than that of the second magnetic yoke 215 in the third direction Z; that is, the height of the first magnetic yoke 214 is greater than the height of the second magnetic yoke 215. This arrangement causes the first magnetic yoke 214 to extend further toward the diaphragm assembly 11 than the second magnetic yoke 215, resulting in a larger area of ​​the portion of the first magnetic yoke 214 opposite the main magnet 22. This effectively enhances the strength of the magnetic field generated by the cooperation of the first magnetic yoke 214 and the main magnet 22. The smaller height of the second magnetic yoke 215 effectively avoids other components of the sound-generating device; for example, it can provide an installation position for the centering support 3, making the structural distribution of the sound-generating device more rational.

[0122] In at least one embodiment, the surface of the first yoke portion 214 facing away from the yoke body 213 is higher than or flush with the surface of the main magnet 22 facing away from the yoke body 213. This arrangement allows for a greater magnetic field strength generated by the main magnet 22 and the first yoke portion 214.

[0123] Optionally, such as Figure 5 As shown, the end face of the first yoke portion 214 facing away from the yoke body 213 is higher than the surface of the main magnet 22 facing away from the yoke body 213. That is, the end face of the first yoke portion 214 facing away from the yoke body 213 extends beyond the surface of the main magnet 22 facing away from the yoke body 213. Of course, it can be understood that the surface of the first yoke portion 214 facing away from the yoke body 213 can also be flush with the surface of the main magnet 22 facing away from the yoke body 213; this embodiment does not limit this.

[0124] Please continue reading Figure 5 The surface of the main magnet 22 away from the magnetic yoke body 213 may also be provided with a first magnetic sheet 25, which can be used to enhance the magnetic field strength of the main magnet 22.

[0125] In some optional embodiments, the second magnetic yoke 215 in this embodiment can be an integral structure. Of course, it is understood that the second magnetic yoke 215 can also be a split structure. For example, the second magnetic yoke 215 is composed of multiple magnetic blocks spaced apart along the second direction Y. This embodiment does not limit this.

[0126] Optionally, when the first magnetic yoke 21 includes the second magnetic yoke portion 215, such as Figure 7and Figure 8 As shown, the first limiting portion 102 of the housing 10 abuts against the second magnetic yoke portion 215, that is, the surface of the second magnetic yoke portion 215 facing away from the sealing cavity 100 abuts against the first limiting portion 102. The number of first limiting portions 102 is the same as the number of second magnetic yoke portions 215 and they correspond one-to-one. The first limiting portion 102 abuts against the corresponding second magnetic yoke portion 215 to restrict the movement of the second magnetic yoke portion 215 relative to the housing 10 in the first direction X.

[0127] Optionally, such as Figure 3 As shown, when the magnetic structure 2a includes a second yoke portion 215, the clearance notch 2151 of the magnetic structure 2a can be provided on the second yoke portion 215; or, the clearance notch 2151 can also be provided between the first yoke portion 214 and the second yoke portion 215, that is, the first yoke portion 214 and the second yoke portion 215 are spaced apart to form the clearance notch 2151. The stop portion 104 of the housing 10 abuts against the first yoke portion 214 and / or the second yoke portion 215 to form a relatively sealed sealing cavity 100.

[0128] In at least one implementation, such as Figures 1 to 11 As shown, the first magnetic yokes 21 of the multiple sound-generating modules 20 are an integral structure, that is, the multiple first magnetic yokes 21 are connected sequentially to form a whole, or the multiple first magnetic yokes 21 are a single integral part that can be obtained in a single processing step. This configuration enables the sharing of the first magnetic yokes 21 of the multiple sound-generating modules 20.

[0129] Based on the fact that multiple first magnetic yokes 21 are integrated into a single structure, such as Figure 3 As shown, there are two sound-generating modules 20. The two first magnetic yokes 21 are connected into an integral structure. The two ends of the integral structure in the first direction X are provided with second magnetic yokes 215, while the middle part is not provided with second magnetic yokes 215.

[0130] Of course, this is understandable. Figure 14 and Figure 15 As shown, the multiple first magnetic yokes 21 may not be a single integrated structure, but rather a separate structure that is independent of each other. This embodiment does not limit this.

[0131] Based on the premise that the multiple first magnetic yokes 21 are not a single-piece structure, each first magnetic yoke 21 has a second magnetic yoke portion 215 at both ends of the magnetic yoke body 213 in the first direction X. For example Figure 15 As shown, there are two sound-generating modules 20. The housing 10 has a first limiting part 102 in the area between the two sound-generating modules 20. The two surfaces of the first limiting part 102 in the first direction X respectively abut against the two second magnetic yokes 215 to limit the two first magnetic yokes 21.

[0132] In another type of magnetic structure 2a, the magnetic structure 2a is a split structure. For example, as shown... Figure 12 and Figure 13 As shown, the magnetic structure 2a includes a second magnetic yoke 26 and a secondary magnet 24. The secondary magnet 24 is spaced apart on both sides of the main magnet 22 in the second direction Y, forming a magnetic gap 23 between the main magnet 22 and the secondary magnet 24. In this embodiment, the main magnet 22 is connected to the second magnetic yoke 26, and the secondary magnet 24 is connected to the second magnetic yoke 26 and / or the housing 10. In this embodiment, the secondary magnet 24 and the second magnetic yoke 26 are not integral structures, so the specific structure of the secondary magnet 24 is not affected by the second magnetic yoke 26. For example, the second magnetic yoke 26 can be a thin plate-like structure, while the secondary magnet 24 can be a thick block-like structure. Thus, the secondary magnet 24 has a larger volume, enabling it to cooperate with the main magnet 22 to form a stronger magnetic field.

[0133] Optionally, when the magnetic structure 2a includes the second magnetic yoke 26, the through hole 211 and the through hole 212 can both be disposed on the second magnetic yoke 26 so as not to affect the magnetism of the auxiliary magnet 24.

[0134] In some optional embodiments, when the magnetic structure 2a includes a second yoke 26 and a secondary magnet 24, the specific location of the adhesive groove 40 between the housing 10 and the magnetic structure 2a can be between the housing 10 and the secondary magnet 24. That is, the housing 10 and the secondary magnet 24 cooperate to form the adhesive groove 40. In this case, the adhesive groove 40 can be used to increase the connection strength between the housing 10 and the secondary magnet 24.

[0135] In one possible implementation, when the magnetic structure 2a includes a secondary magnet 24, the secondary magnet 24 abuts against the support boss 105, so that the support boss 105 supports the entire magnetic structure 2a by supporting the secondary magnet 24.

[0136] In at least one embodiment, the surface of the secondary magnet 24 facing away from the second yoke 26 (or extension 261) is higher than or flush with the surface of the primary magnet 22 facing away from the second yoke 26. This arrangement allows for a greater strength of the magnetic field generated by the primary magnet 22 and the secondary magnet 24. Optionally, a first magnetic conductive sheet 25 may be provided on the primary magnet 22, and a second magnetic conductive sheet may be provided on the secondary magnet 24, the second magnetic conductive sheet being used to increase the strength of the secondary magnet 24.

[0137] In some alternative embodiments, the second magnetic yoke 26 may be provided with an avoidance notch 2151, and the stop portion 104 abuts against the second magnetic yoke 26. The stop portion 104, the housing 10, the diaphragm assembly 11, the second magnetic yoke 26 and the auxiliary magnet 24 cooperate with each other to form a sealed cavity 100.

[0138] In some alternative embodiments, such as Figure 12 As shown, the second magnetic yoke 26 has extensions 261 extending along the second direction Y on both sides, and the auxiliary magnet 24 is correspondingly disposed on the extensions 261. By providing the extensions 261, the auxiliary magnet 24 can be supported, making the entire sound-generating device structure more neat.

[0139] Optionally, the sub-magnet 24 and the extension 261 can be bonded together with adhesive to eliminate gaps between them and improve the fixing strength of the sub-magnet 24.

[0140] In at least one embodiment, such as Figure 12 and Figure 13 As shown, the housing 10 has a receiving groove 101 at the position corresponding to the secondary magnet 24, and at least a portion of the secondary magnet 24 is disposed in the receiving groove 101. By providing the receiving groove 101, the secondary magnet 24 can be limited, reducing the risk of the secondary magnet 24 moving relative to the housing 10. Furthermore, by providing the receiving groove 101, the precise assembly of the secondary magnet 24 can be facilitated, reducing the assembly difficulty.

[0141] It should be noted that the receiving groove 101 in this embodiment has a groove wall in the first direction X but no groove wall in the second direction Y. This configuration allows the auxiliary magnet 24 to have a larger volume and stronger magnetism; on the other hand, there is no obstruction between the auxiliary magnet 24 and the main magnet 22, allowing the auxiliary magnet 24 and the main magnet 22 to cooperate to generate a stronger magnetic field.

[0142] In some alternative embodiments, such as Figure 12 As shown, the perforation 211 is located on one side of the extension 261 in the first direction X, that is, the orthographic projection of the perforation 211 and the extension 261 in the second direction Y does not coincide. This arrangement makes full use of the space of the second magnetic yoke 26 and reduces the impact of the perforation 211 on the structural strength of the extension 261, so as to ensure the effect of supporting the auxiliary magnet 24.

[0143] In at least one implementation, please continue to see Figure 12 The second magnetic yoke 26 is provided with a folded edge 262 that bends toward the housing 10 or toward the diaphragm assembly 11. The first limiting part 102 of the housing 10 can abut against the folded edge 262, thereby limiting the second magnetic yoke 26.

[0144] Optionally, the folded edge 262 may be provided with a clearance notch 2151, and the stop portion 104 of the housing 10 may abut against the folded edge 262 and the secondary magnet 24 to cover the clearance notch 2151, thereby forming a relatively sealed cavity 100. Simultaneously, the stop portion 104 also positions the secondary magnet 24, achieving multiple uses for the stop portion 104. In other optional embodiments, the clearance notch 2151 may also be formed by the folded edge 262 and the secondary magnet 24 being spaced apart; this embodiment does not limit this.

[0145] In at least one implementation, such as Figure 12 As shown, the second magnetic yokes 26 of the multiple sound-generating modules 20 are an integral structure, that is, the multiple second magnetic yokes 26 are connected sequentially to form a whole, or the multiple second magnetic yokes 26 are a single integral part that can be obtained in a single processing step. This configuration enables the sharing of the second magnetic yokes 26 of the multiple sound-generating modules 20.

[0146] Based on the fact that multiple first magnetic yokes 21 are integrated into a single structure, such as Figure 12 As shown, there are two sound-generating modules 20. The two first magnetic yokes 21 are connected into an integral structure. The two ends of the integral structure in the first direction X are provided with second magnetic yokes 215, while the middle part is not provided with second magnetic yokes 215.

[0147] It is understandable that the multiple second magnetic yokes 26 may not be a single integrated structure, but rather a separate structure that is independent of each other. This embodiment does not limit this.

[0148] Based on the fact that the multiple second magnetic yokes 26 are not a single-piece structure, each second magnetic yoke 26 has a flange 262 at both ends in the first direction X, and each flange 262 can abut against the first limiting part 102.

[0149] The above are the specific structures of the two magnetic circuit structures provided in this embodiment. Regardless of the structure, they can cooperate with the housing 10 to form a relatively sealed cavity 100, and can also cooperate with the main magnet 22 to generate a magnetic field of greater intensity. The specific structure can be selected according to actual needs.

[0150] In at least one possible implementation, such as Figure 3 As shown. The sound-generating device also includes a centering support 3, which supports the voice coil 12 so that the voice coil 12 can move in the magnetic gap 23 along the third direction Z. The centering support 3 also has the function of resetting the voice coil 12.

[0151] For example, a plurality of stop portions 104 are provided on one end face of the housing 10 along the axial direction. The stop portion 104 is the stop portion 104 mentioned above in this embodiment. A plurality of centering support plates 3 are provided, and each voice coil 12 of the sound-generating module 20 is connected to a centering support plate 3 at both ends in the first direction X. The end of the centering support plate 3 facing away from the voice coil 12 is connected to the housing 10. Each centering support plate 3 is provided with a positioning notch 35 that cooperates with the stop portion 104. The stop portion 104 passes through the corresponding positioning notch 35 and abuts against the centering support plate 3 to limit the positioning of the centering support plate 3.

[0152] In some alternative embodiments, the stop 104 may engage with the positioning notch 35 to limit the centering support 3.

[0153] In this embodiment, the clearance notch 2151 on the magnetic structure 2a is used to avoid the centering support piece 3, so as to facilitate the assembly and elastic deformation of the centering support piece 3, and so that the magnetic structure 2a will not affect the centering support piece 3.

[0154] In this embodiment, the end of the centering support 3 that is away from the voice coil 12 is connected to the end face of one end of the housing 10 in the axial direction, for example, by adhesive bonding.

[0155] It should be noted that each voice coil 12 of the sound-generating module 20 is provided with a centering support plate 3 at both ends in the first direction X, so that both ends of the voice coil 12 can be supported by the centering support plate 3, thereby making the voice coil 12 more balanced, reducing the risk of the voice coil 12 tilting, thereby reducing the risk of noise when the sound-generating device is working, and ensuring the sound quality of the sound-generating device.

[0156] Optionally, the positioning notch 35 is oriented toward the voice coil 12 to facilitate the connection between the centering support 3 and the voice coil 12.

[0157] The sound-generating device provided in this embodiment has a stop portion 104 in the housing 10 and a positioning notch 35 that cooperates with the stop portion 104 in the centering support plate 3. The stop portion 104 passes through the positioning notch 35 to restrict the movement of the centering support plate 3 relative to the housing 10. With the direct fixed connection between the centering support plate 3 and the housing 10, the connection strength between the centering support plate 3 and the housing 10 is high, which reduces the risk of connection failure between the centering support plate 3 and the housing 10 and ensures the reliability of the connection between the centering support plate 3 and the housing 10.

[0158] In some optional embodiments, the centering support 3 is sandwiched between the magnetic structure 2a and the housing 10 at one end away from the voice coil 12. When the magnetic structure 2a includes a second yoke 215, the centering support 3 is sandwiched between the second yoke 215 and the end face of the housing 10 away from the diaphragm assembly 11. When the magnetic structure 2a includes a second yoke 26, the centering support 3 is sandwiched between the folded edge 262 of the second yoke 26 and the end face of the housing 10 away from the diaphragm assembly 11.

[0159] In at least one implementation, such as Figure 3 As shown, a limiting groove 36 is provided on the side of the centering support 3 away from the voice coil 12 to which it is connected. At this time, at least a portion of the first limiting part 102 provided on the end face of one end of the housing 10 in the axial direction is placed in the limiting groove 36. This arrangement can assist the stop part 104 in fixing and limiting the centering support 3, further reducing the risk of the centering support 3 moving relative to the housing 10.

[0160] It should be noted that in this embodiment, the first limiting part 102 and the centering support 3 are arranged in the first direction X, so that the first limiting part 102 can restrict the movement of the centering support 3 in the first direction X.

[0161] As can be seen, the first limiting part 102 in this embodiment can not only be used to abut against the magnetic structure 2a to limit the magnetic structure 2a, but also to limit the centering support piece 3, realizing the multiple uses of the first limiting part 102 and enriching the function of the first limiting part 102.

[0162] In at least one embodiment, such as Figure 7 and Figure 8 As shown, a plurality of support slots 106 are provided on one end face of the housing 10 along the axial direction, and the centering support 3 is correspondingly disposed in the support slots 106. By providing the support slots 106, the centering support 3 can be installed, and the movement of the centering support 3 can be limited by the support slots 106, further reducing the risk of the centering support 3 moving relative to the housing 10.

[0163] In this embodiment, the shape of the support groove 106 matches that of the centering support 3, so that the end of the centering support 3 away from the voice coil 12 can be limited in the support groove 106.

[0164] Optionally, at least a portion of the stop portion 104 is located in the support groove 106 so that it can be smoothly inserted into the positioning notch 35.

[0165] In some alternative embodiments, such as Figure 9 and Figure 10As shown, the centering support 3 may also be provided with a relief groove 37, which is used to avoid the voice coil 12 connected to the centering support 3. By providing the relief groove 37, the connection area between the centering support 3 and the voice coil 12 can be designed to be larger based on the voice coil 12, thereby improving the connection strength and reliability between the centering support 3 and the voice coil 12 and reducing the risk of separation between the two.

[0166] The centering support 3 has various structures, and this embodiment provides one type of centering support 3.

[0167] For example, such as Figure 9 and Figure 10 As shown, the centering support 3 includes a support body 31, a first connecting portion 32, a transition portion 33, and a second connecting portion 34. The support body 31 is used to connect to the housing 10; that is, the support body 31 is connected to the end face of the housing 10 facing away from the diaphragm assembly 11. In this embodiment, two first connecting portions 32 are arranged opposite each other. The two first connecting portions 32 are connected to the same side of the support body 31, and the first connecting portions 32 are also used to connect to the housing 10; that is, the first connecting portions 32 are used for fixed connection to the end face of the housing 10 facing away from the diaphragm assembly 11.

[0168] By providing two first connecting parts 32, the connection area between the centering support 3 and the housing 10 can be increased to ensure the connection strength; furthermore, both the first connecting parts 32 and the support body 31 are connected to the housing 10, which can further reduce the connection strength and connection reliability between the centering support 3 and the housing 10.

[0169] In this embodiment, the shape of the first connecting portion 32 matches the shape of the area of ​​the housing 10 used to connect to the centering support 3, so as to ensure that the first connecting portion 32 and the centering support 3 have a large contact area. For example, when the area of ​​the housing 10 used to connect the centering support 3 is arc-shaped, the first connecting portion 32 is set to arc-shaped. When the area of ​​the housing 10 used to connect the centering support 3 is straight, the first connecting portion 32 is set to straight.

[0170] like Figure 9 and Figure 10As shown, the transition portion 33 is located between the two first connecting portions 32, that is, the transition portion 33 and the first connecting portions 32 are located on the same side of the support body portion 31. The transition portion 33 is connected to the support body portion 31, and at least a portion of the transition portion 33 forms a curved section 331, which is spaced apart from the support body portion 31. In this embodiment, the second connecting portion 34 is connected to the transition portion 33, and the second connecting portion 34 is spaced apart from the curved section 331. The second connecting portion 34 is connected to the voice coil 12. In this embodiment, the movement direction of the voice coil 12 is the third direction Z (i.e., the height direction of the housing 10), and the thickness direction of the centering support 3 is the third direction Z. The direction in which the centering support 3 undergoes elastic deformation is also the third direction Z.

[0171] By incorporating the bending segment 331, the centering support 3 is able to undergo elastic deformation, thereby enabling the voice coil 12 to reset. The bending segment 331 is spaced apart from the support body 31 and the second connecting portion 34, allowing the second connecting portion 34 to move relative to the bending segment 331, and the bending segment 331 to move relative to the support body 31. This allows for a larger elastic deformation amplitude of the centering support 3 in the third direction Z, making it suitable for various application scenarios.

[0172] It is understandable that the bending segment 331 can also be spaced apart from the first connecting portion 32 so that the first connecting portion 32 will not affect the elastic deformation of the bending segment 331.

[0173] Optionally, when the centering support 3 includes a first connecting portion 32 and a transition portion 33, such as Figure 9 As shown, a positioning notch 35 is formed between the first connecting portion 32 and the transition portion 33. The stop portion 104 preferably abuts against the first connecting portion 32, thereby limiting the movement of the first connecting portion 32 and thus positioning the centering support 3. A gap may exist between the stop portion 104 and the transition portion 33 to prevent friction between them, reducing the resistance to the movement of the voice coil 12.

[0174] In this embodiment, a positioning notch 35 is formed between each first connecting part 32 and the transition part 33, that is, the centering support piece 3 is provided with two positioning notches 35. Correspondingly, the housing 10 is provided with two stops 104 for each centering support piece 3, and the two stops 104 are inserted into the corresponding positioning notches 35. By providing two positioning notches 35, the positioning effect of the centering support piece 3 can be further improved, and the risk of the centering support piece 3 moving relative to the housing 10 can be reduced.

[0175] In some optional embodiments, the limiting groove 36 is provided on the main body of the support piece 31, that is, the limiting groove 36 is provided on the side of the main body of the support piece 31 away from the first connecting part 32. Since two first connecting parts 32 are provided, and both first connecting parts 32 are in contact with and connected to the surface of the housing 10, the connection strength between the centering support piece 3 and the housing 10 will not be reduced even if the limiting groove 36 is provided on the main body of the support piece.

[0176] In at least one possible implementation, such as Figure 9 and Figure 10 As shown, the transition section 33 includes two symmetrically arranged curved sections 331, each in a U-shape. By symmetrically arranging two curved sections 331, the structural strength of the centering support 3 is improved, reducing the risk of breakage. Furthermore, the force on the voice coil 12 is more balanced, reducing the risk of skewness due to imbalance in the centering support 3 and improving the reliability of the voice coil 12 support. The U-shape of the curved sections 331 simplifies their structure, facilitating manufacturing. Additionally, the curved sections 331 occupy less space in the first direction X, contributing to the miniaturization and weight reduction of the centering support 3.

[0177] In at least one embodiment, one end of the curved section 331 may be connected to the main body of the support piece 31, and the other end may be connected to the second connecting part 34.

[0178] To further reduce the risk of voice coil 12 becoming unbalanced, in this embodiment, the centering support 3 has an axisymmetric structure, wherein the axis of symmetry of the centering support 3 extends along the width direction of the centering support 3. This configuration further reduces the risk of the centering support 3 becoming unbalanced, therefore, the voice coil 12 will not become unbalanced due to the movement of the centering support 3. It should be noted that when the centering support 3 is mounted on the housing 10, the width direction of the centering support 3 is the same as the first direction X, and the two first connecting portions 32 are located on both sides of the transition portion 33 in the length direction of the centering support 3, with the length direction of the centering support 3 perpendicular to the width direction.

[0179] Optionally, when the centering support 3 includes a second connecting portion 34, a clearance groove 37 is provided in the second connecting portion 34. That is, a clearance groove 37 is provided on the side of the second connecting portion 34 away from the transition portion 33. With this configuration, the portion of the second connecting portion 34 without the clearance groove 37 can connect with the voice coil 12, and this portion has a larger area, thus improving the strength of the connection with the voice coil 12. For example, the second connecting portion 34 extends along the second direction Y, and both ends of the second connecting portion 34 are connected to the voice coil 12 to further improve the connection strength with the voice coil 12.

[0180] In at least one possible implementation, such as Figure 8As shown, a crossbeam 107 is provided between the two walls in the width direction of the housing 10. The crossbeam 107 can serve as a support structure for the centering support plate 3. It should be noted that the crossbeam 107 divides the housing 10 into multiple through holes, and the multiple through holes correspond one-to-one with multiple sound generating modules 20. At least part of the voice coil 12, main magnet 22 and other components of each generating module can be located in the corresponding through hole.

[0181] In this embodiment, as Figure 7 and Figure 8 As shown, the centering support 3 near the end of the housing 10 can be directly fixed to the housing 10. That is, the centering support 3 located on the side of the voice coil 12 that is not opposite to the other voice coils 12 is directly fixed to the housing 10. The centering support 3 away from the end of the housing 10 can be connected to the crossbeam 107, and then connected to the housing 10 through the crossbeam 107. That is, at least a portion of the centering support 3 located on the side opposite to the voice coil 12 is connected to the crossbeam 107 for fixation.

[0182] It should be noted that the centering support 3, located on the opposite side of the voice coil 12, can be partially connected to the crossbeam 107 and partially connected to the housing 10. For example, as shown... Figure 7 As shown, the main body 31 of the centering support 3, which is located on the opposite side of the voice coil 12, is fixedly connected to the crossbeam 107, and the first connecting part 32 is directly connected to the end face of the housing 10 away from the diaphragm assembly 11.

[0183] In at least one embodiment, since each of the two opposing voice coils 12 needs to be connected to two centering supports 3, there will be two centering supports 3 on opposite sides of the two voice coils 12. Optionally, as Figure 7 and Figure 10 As shown, the two centering supports 3 located on opposite sides of the voice coil 12 are connected as a single unit, that is, the two centering supports 3 are connected back-to-back to form a whole. This arrangement improves the assembly efficiency of the centering supports 3, eliminating the need to install them individually on the housing 10; furthermore, the connection area between the two centering supports 3 and the crossbeam 107 is relatively large, making full use of the space on the crossbeam 107 and further enhancing the connection strength between the centering supports 3 and the crossbeam 107.

[0184] Optionally, please continue to see Figure 10 The main body 31 of the two centering support plates 3 are connected into one piece, and the first connecting parts 32 of the two centering support plates 3 are connected into one piece in a corresponding manner.

[0185] It should be noted that, for the centering support 3 located on opposite sides of the two voice coils 12, such as Figure 7 As shown, a stop 104 is also provided in the middle of the housing 10 near the crossbeam 107 to limit the centering support 3 located on opposite sides of the two voice coils 12.

[0186] It is understood that if the magnetic structure 2a has a clearance notch 2151 near the crossbeam 107, the stop portion 104 near the crossbeam 107 can be used to cover the clearance notch 2151 to form a relatively sealed cavity 100. If the magnetic structure 2a does not have a clearance notch 2151 near the crossbeam 107, the stop portion 104 near the crossbeam 107 can be used to limit the centering support 3 and the magnetic structure 2a, and may not have the function of covering the clearance notch 2151. The specific choice can be made according to the requirements, and this embodiment does not limit it.

[0187] Optionally, for a structure in which the first magnetic yokes 21 of multiple sound-generating modules 20 are connected as a single unit, such as Figure 10 As shown, the support body 31 of the centering support 3 located on opposite sides of the two voice coils 12 may not have a clearance groove 37. Because the crossbeam 107 does not need to have a first limiting part 102 for limiting the first magnetic yoke 21, the centering support 3 does not need to have a clearance groove 37.

[0188] In one embodiment, such as Figure 15 As shown, when the first magnetic yokes 21 of the sound-generating modules 20 are independent of each other, the first limiting part 102 between the sound-generating modules 20 is fixedly mounted on the crossbeam 107. At this time, as... Figure 16 As shown, the centering support 3 is provided with a relief groove 37, and the relief grooves 37 of the two centering support 3 cooperate with each other to form a through hole 38. The first limiting part 102 is provided through the through hole 38 to limit the two centering support 3, so that the two centering support 3 will not move in the first direction X.

[0189] In some optional embodiments, the centering support 3 in this embodiment also has a conductive function. For example, conductive lines can be provided on the surface or inside the centering support 3. One end of the conductive line is electrically connected to the voice coil 12, and the other end of the conductive line protrudes from the housing 10 and is used for electrical connection to an external circuit. With this configuration, the centering support 3 has more functions and higher utilization. It is understood that of the two centering supports 3 corresponding to each voice coil 12, only one centering support 3 may have a conductive function, while the other centering support 3 may only have a supporting function.

[0190] For example, such as Figure 7 As shown, the two centering supports 3, located on opposite sides of the two voice coils 12 and connected as a single unit, are centering supports 3 with conductive functions. Combined with... Figure 2 and Figure 7A conductive coating 60 is provided on the first connecting part 32 of the centering support 3. The conductive coating 60 is located in the support groove 106 and exposed to the outside, thereby facilitating electrical connection with other circuits.

[0191] This embodiment also provides an electronic device, including the sound-generating device as described in the above embodiments. The electronic device can possess high acoustic performance. For example, the electronic device can be smart glasses, with the sound-generating device disposed on the temple of the smart glasses, and the length direction of the housing being the same as the length direction of the temple.

[0192] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the appended claims.

Claims

1. A sound-generating device, characterized in that, include: A housing, wherein the housing is provided with a stop portion; A sound-generating module is provided in multiple groups along a first direction; each group of sound-generating modules includes a vibration system and a magnetic circuit system. The vibration system includes a diaphragm assembly and a voice coil connected at one end to the diaphragm assembly. The magnetic circuit system has a magnetic gap, and the end of the voice coil facing away from the diaphragm assembly is located in the magnetic gap. The voice coil cooperates with the magnetic circuit system to drive the diaphragm assembly to vibrate. The magnetic circuit system has a clearance notch, and a stop portion abuts against the circumferential side of the magnetic circuit system and covers the clearance notch. The stop portion, the housing, the diaphragm assembly, and the magnetic circuit system cooperate to form a sealed cavity. The first direction is the length direction of the housing.

2. The sound-generating device according to claim 1, characterized in that, Each of the magnetic circuit systems is provided with multiple stop portions at intervals around its periphery; Alternatively, each of the magnetic circuit systems abuts against the stop portion on both sides in the second direction; the second direction is the width direction of the housing.

3. The sound-generating device according to claim 1, characterized in that, The magnetic circuit system includes a first magnetic yoke and a main magnet disposed on the first magnetic yoke, the first magnetic yoke and the main magnet forming the magnetic gap; the first magnetic yoke is provided with the clearance notch, the stop portion abuts against the first magnetic yoke, the stop portion, the housing, the diaphragm assembly and the first magnetic yoke cooperate to form a sealed cavity.

4. The sound-generating device according to claim 3, characterized in that, The first magnetic yoke includes a magnetic yoke body and a first magnetic yoke portion and a second magnetic yoke portion disposed on the same side of the magnetic yoke body; the main magnet is disposed on the magnetic yoke body, and the first magnetic yoke portions are spaced apart on both sides of the main magnet in a second direction, and the main magnet and the first magnetic yoke portions are spaced apart to form a magnetic gap; at least one end of the magnetic yoke body in the first direction is connected to the second magnetic yoke portion; the stop portion abuts against the second magnetic yoke portion; The second magnetic yoke portion is provided with the clearance notch; or, the first magnetic yoke portion and the second magnetic yoke portion are spaced apart to form the clearance notch.

5. The sound-generating device according to claim 3, characterized in that, The first magnetic yoke is provided with a perforation, the perforation being connected to the sealed cavity, and the sound-generating device further includes a damping mesh fabric installed in the perforation.

6. The sound-generating device according to claim 3, characterized in that, The first magnetic yoke of the plurality of sound-generating modules is an integral structure; or, the first magnetic yoke of the plurality of sound-generating modules is a separate structure.

7. The sound-generating device according to any one of claims 1-6, characterized in that, The magnetic circuit system includes a second magnetic yoke, a main magnet and a secondary magnet. The secondary magnets are spaced apart on both sides of the main magnet in the second direction, and the magnetic gap is formed between the main magnet and the secondary magnets. The main magnet is connected to the second yoke, and the auxiliary magnet is connected to the second yoke and / or the housing; the clearance notch is provided on the second yoke; the stop portion abuts against the second yoke; the stop portion, the housing, the diaphragm assembly, the second yoke, and the auxiliary magnet cooperate to form the sealed cavity; The second direction is the width direction of the housing.

8. The sound-generating device according to claim 7, characterized in that, The second magnetic yoke is provided with a folded edge that bends toward the diaphragm assembly, and the stop portion abuts against the folded edge; The folded edge is provided with the clearance notch; or, the folded edge is spaced apart from the sub-magnet to form the clearance notch.

9. The sound-generating device according to claim 8, characterized in that, The stop portion abuts against the surface of the folded edge that is away from the sealing cavity.

10. The sound-generating device according to claim 7, characterized in that, The second magnetic yoke has an extension portion extending along the second direction, the extension portion being correspondingly disposed with the auxiliary magnet, and the auxiliary magnet being disposed on the corresponding extension portion.

11. The sound-generating device according to claim 7, characterized in that, The second magnetic yoke is provided with a perforation; the second magnetic yoke, the housing, the auxiliary magnet and the diaphragm assembly cooperate to form a sealed cavity; The perforation communicates with the sealed cavity, and the sound-generating device further includes a damping mesh fabric installed in the perforation.

12. The sound-generating device according to any one of claims 1-6, characterized in that, A glue-filled groove is formed between the housing and the magnetic circuit system, and a connecting glue is disposed in the glue-filled groove to connect the housing and the magnetic circuit system.

13. The sound-generating device according to claim 12, characterized in that, The inner side of the housing is provided with a semi-groove, which cooperates with the surface of the magnetic circuit system to form the adhesive groove.

14. The sound-generating device according to claim 12, characterized in that, The diaphragm assembly is connected to the end face of one end of the housing, and the groove of the adhesive groove is located on the end face of the other end of the housing.

15. An electronic device, characterized in that, Includes the sound-generating device as described in any one of claims 1-14.

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