Diaphragm assemblies, sound-generating devices and electronic equipment

Abstract

This utility model discloses a diaphragm assembly, a sound-generating device, and an electronic device, relating to the field of electroacoustic technology. The diaphragm assembly includes a diaphragm and a dome. The diaphragm includes a central portion, a folded ring portion, and a fixing portion. A central hole is formed in the central portion. The folded ring portion surrounds and connects to the central portion, and the fixing portion surrounds and connects to the folded ring portion. The dome includes a central region and a peripheral region surrounding the central region. The peripheral region has a positioning hole for accommodating a positioning post of an injection mold. The peripheral region is embedded in the central hole and injection molded to the central portion, thereby allowing the central portion to cover the peripheral region, and forming a positioning blind hole at a position corresponding to the positioning hole in the central portion. This utility model's diaphragm assembly, sound-generating device, and electronic device can effectively improve the problem of waterproof membrane rupture.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic technology, and in particular to a diaphragm assembly, a sound-generating device, and an electronic device. Background Technology

[0002] With the development of smart wearable devices, the market demands increasingly higher waterproof ratings, such as 5ATM, 10ATM, and even higher. The diaphragm and dome interface is the most critical waterproof interface. Currently, the optimal solution is to first mold the dome, and then, during the diaphragm injection molding process, inject the dome as an insert into the diaphragm, ensuring a tight fit and effective waterproofing. However, during diaphragm injection molding, the dome needs to be positioned. In existing solutions, the positioning point is placed on the outer edge of the dome. The positioning post position of the mold can cause material shortages in the diaphragm, resulting in small holes (blind holes). Furthermore, these blind holes are located near the diaphragm folds, where stress is high. Therefore, in deep waterproofing tests, the diaphragm positioning hole is prone to rupture. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a diaphragm assembly, sound generating device and electronic device that effectively improve the problem of waterproof membrane rupture.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: On the one hand, this utility model provides a diaphragm assembly, including: A diaphragm, comprising a central portion, a folded ring portion, and a fixing portion, wherein a central hole is provided on the central portion, the folded ring portion surrounds the outer periphery of the central portion and is connected to the central portion, and the fixing portion surrounds the outer periphery of the folded ring portion and is connected to the folded ring portion; The dome includes a central region and a peripheral region surrounding the central region. The peripheral region has a positioning hole for accommodating a positioning post of an injection mold. The peripheral region is embedded in the central hole and injection molded together with the central portion, thereby the central portion covers the peripheral region and a positioning blind hole is formed at the position of the central portion corresponding to the positioning hole.

[0005] In some embodiments of this utility model, the positioning hole is a C-shaped notch or a U-shaped notch.

[0006] In some embodiments of this utility model, the minimum length of the positioning hole is 0.3 mm and the minimum width is 0.2 mm; And / or, the depth of the positioning blind hole exceeds one side surface of the dome by 0.03mm-0.08mm; And / or, in the length direction of the dome, the size of the positioning hole does not exceed 1 / 3 of the total length of the dome, and in the width direction of the dome, the size of the positioning hole does not exceed 1 / 3 of the total width of the dome.

[0007] In some embodiments of this utility model, the positioning hole is a circular hole.

[0008] In some embodiments of this utility model, the minimum diameter of the positioning hole is 0.2 mm, and the maximum diameter does not exceed 1 / 3 of the width of the dome; And / or, the edge of the positioning hole is at least 0.2 mm away from the outer edge of the dome.

[0009] In some embodiments of this utility model, the positioning hole is located only on the long side of the dome, and each long side of the dome is provided with two positioning holes and the positioning holes are located on both sides of the long side; Alternatively, the positioning hole may be located only on the short side of the dome, with each short side of the dome having one positioning hole and the positioning hole located at the center of the short side; Alternatively, the positioning hole is located on the long side and the short side of the dome, with each side of the dome having one positioning hole and the positioning hole being located at the center of each side; Alternatively, the positioning holes are located on the long and short sides of the dome, with two positioning holes on each long side of the dome and the positioning holes located on both sides of the long side, and one positioning hole on each short side of the dome and the positioning hole located at the center of the short side.

[0010] In some embodiments of this utility model, the middle region of the dome is provided with a dumbbell-shaped reinforcing protrusion along the length direction.

[0011] On the other hand, this utility model provides a sound-generating device, including a housing and a vibration system and a magnetic circuit system housed within the housing, wherein: The magnetic circuit system includes a support plate and two magnetic components spaced apart on the support plate, with a magnetic gap formed between the two magnetic components. The vibration system includes the diaphragm assembly described above and a voice coil for driving the diaphragm assembly to vibrate. The axial direction of the voice coil is perpendicular to the vibration direction of the diaphragm assembly, and the voice coil is disposed in the magnetic gap.

[0012] In some embodiments of this utility model, each magnetic component includes a first magnetic plate, a first magnet, a second magnetic plate, and a second magnet stacked sequentially along the vibration direction. The second magnet is connected to the support plate. The first magnet and the second magnet of each magnetic component are magnetized along the vibration direction and in opposite directions. The first magnets of two magnetic components are magnetized in opposite directions. The support plate is a magnetic plate. Alternatively, each of the magnetic components includes a first magnet, a second magnet, and a third magnet arranged sequentially along the vibration direction, with the third magnet disposed on the support plate. The first magnet and the third magnet are both magnetized in a direction perpendicular to the vibration direction but in opposite directions. The second magnet is magnetized along the vibration direction, and the polarity of the second magnet toward the first magnet is the same as the polarity of the first magnet's pole near the magnetic gap.

[0013] On the other hand, this utility model provides an electronic device, including the aforementioned sound-generating device.

[0014] This utility model has the following beneficial effects: The diaphragm assembly, sound-generating device, and electronic equipment of this invention feature a positioning hole on the outer periphery of the dome. This positioning hole accommodates the positioning post of the injection mold, ensuring the precise position of the dome within the central hole of the diaphragm and preventing displacement or rotation. The outer periphery of the dome is embedded within the central hole of the diaphragm, and the central part of the diaphragm is covered by injection molding of the outer periphery of the dome, greatly enhancing the connection strength between the dome and the diaphragm. This design also creates a sealed environment, reducing the possibility of moisture seeping in through gaps. Compared to existing technologies where the positioning position is directly placed on the outer edge of the dome, this invention creates a positioning hole at the edge of the dome (outer periphery), with the positioning post of the diaphragm injection mold placed at the positioning hole. The positioning blind hole formed on the diaphragm during injection molding is located away from the stress concentration area (folded ring), effectively improving the waterproof membrane rupture problem and greatly enhancing the waterproof rating of the equipment. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural diagram of a first embodiment of the diaphragm assembly of the present invention, wherein (a) is a front view, (b) is a right sectional view, and (c) is a front view of the dome. Figure 2 This is a structural diagram of a second embodiment of the diaphragm assembly of the present invention, wherein (a) is a front view, (b) is a top sectional view, and (c) is a front view of the dome. Figure 3This is a structural diagram of the diaphragm assembly of the present invention, wherein (a) is a front view, (b) is a top sectional view, and (c) is a front view of the dome. Figure 4 This is a structural diagram of the diaphragm assembly of the present invention in embodiment four, wherein (a) is a front view, (b) is a top sectional view, and (c) is a front view of the dome. Figure 5 This is a structural diagram of the fifth embodiment of the diaphragm assembly of this utility model, wherein (a) is a front view, (b) is a right sectional view, and (c) is a front view of the dome. Figure 6 The diagram shows the structure of a diaphragm assembly in the prior art, where (a) is a front view, (b) is a right sectional view, and (c) is a front view of the dome. Figure 7 Stress cloud diagrams of diaphragm assemblies in the prior art and diaphragm assemblies of the present invention are shown, wherein (a) corresponds to the prior art and (b) corresponds to the present invention. Figure 8 This is a structural diagram of an embodiment of the sound-generating device of the present invention, wherein (a) is one embodiment and (b) is another embodiment.

[0016] Figure label: 100. Diaphragm assembly 1. Diaphragm; 11. Central section; 111. Central hole; 112. Positioning blind hole; 12. Folded ring section; 13. Fixing section. 2. Dome, 21. Middle area, 211. Reinforcing protrusion, 22. Outer area, 221. Positioning hole. 201. Support plate; 202. Magnetic assembly; 2021. First magnetic guide plate; 2022. First magnet; 2023. Second magnetic guide plate; 2024. Second magnet; 2025. First magnet; 2026. Second magnet; 2027. Third magnet; 203. Front cover; 204. Silicone ring; 205. Upper shell; 206. Lower shell; 207. FPC. 301, voice coil, A. Position of the blind hole 112 before improvement; B. Position of the blind hole 112 after improvement. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In existing technologies, such as Figure 6 As shown, there is no positioning notch on the dome 2 (corresponding to the positioning hole 221 in this utility model). During the injection molding process of the diaphragm 1, the positioning post on the mold positions the outer edge of the dome 2. After the injection molding is completed, the positioning notch is only formed at the diaphragm 1. At this time, the position of the positioning post of the mold will cause the diaphragm to lack material and form a small hole (corresponding to the positioning blind hole 112 in this utility model). The position of this hole is close to the diaphragm fold ring, and the stress is large. Therefore, in the deep waterproof test, the diaphragm positioning hole (i.e., the positioning blind hole 112) is prone to breakage.

[0019] On the one hand, this utility model embodiment provides a diaphragm assembly 100, such as Figure 1-5 As shown, it includes: The diaphragm 1 includes a central part 11, a folded ring part 12 and a fixing part 13. A central hole 111 is provided on the central part 11. The folded ring part 12 surrounds the outer periphery of the central part 11 and is connected to the central part 11. The fixing part 13 surrounds the outer periphery of the folded ring part 12 and is connected to the folded ring part 12. The dome 2 includes a central region 21 and a peripheral region 22 surrounding the central region 21. The peripheral region 22 is provided with a positioning hole 221 for accommodating the positioning post of the injection mold. The peripheral region 22 is embedded in the central hole 111 and injection molded together with the central part 11, so that the central part 11 covers the peripheral region 22, and a positioning blind hole 112 is formed at the position of the central part 11 corresponding to the positioning hole 221.

[0020] During injection molding, the dome 2 is first placed in the appropriate position of the mold. Then, the positioning pin of the injection mold is positioned in the positioning hole 221 on the outer periphery 22 of the dome 2. Finally, injection molding is performed until the central part 11 of the diaphragm 1 is injection molded and combined with the outer periphery 22 of the dome 2. At this time, the central part 11 of the diaphragm 1 covers the outer periphery 22 of the dome 2, and the position of the central part 11 corresponding to the positioning hole 221 forms a positioning blind hole 112.

[0021] The diaphragm assembly 100 of this invention has a positioning hole 221 in the outer region 22 of the dome 2. This positioning hole 221 is used to accommodate the positioning post of the injection mold, ensuring that the position of the dome 2 in the central hole 111 of the diaphragm 1 is highly accurate and preventing displacement or rotation. The outer region 22 of the dome 2 is embedded in the central hole 111 of the central part 11 of the diaphragm 1, and the central part 11 of the diaphragm 1 is covered by injection molding of the outer region 22 of the dome 2, which greatly enhances the connection strength between the dome 2 and the diaphragm 1. Moreover, this design creates a sealed environment, reducing the possibility of moisture seeping in through gaps. Compared with the prior art where the positioning position is directly placed on the outer edge of the dome 2, in this invention, the positioning hole 221 is formed by opening the edge position (outer region 22) of the dome 2. The positioning post of the diaphragm injection mold is placed at the position of the positioning hole 221. The positioning blind hole 112 formed on the diaphragm 1 during the injection molding process is far away from the stress concentration area (folded ring part), which effectively improves the problem of waterproof membrane breakage and greatly improves the waterproof level of the equipment.

[0022] The opening (positioning hole 221) of the dome 2 is covered by the diaphragm 1. The larger the positioning hole 221 is, the more material the diaphragm 1 covers (central part 11), and the heavier the diaphragm 1 becomes. Excessive weight will affect the rigidity of the dome 2 and the high-frequency performance of the speaker. Therefore, there are certain requirements for the size of the positioning hole 221 and the positioning blind hole 112. Moreover, the positioning hole 221 can be in various structural forms that are easily conceived by those skilled in the art, as detailed below: Structural Form 1: In some embodiments of this utility model, such as Figure 1-4 As shown, the positioning hole 221 can be a C-shaped notch or a U-shaped notch. That is, the positioning hole 221 is set at the edge of the outer periphery 22 of the dome 2. In this way, during the injection molding process, the C-shaped notch or U-shaped notch can make the diaphragm 1 and the dome 2 fit more tightly; and make it easier for air to escape from the opening end of the notch, avoiding defects such as air bubbles, insufficient filling or poor welding caused by trapped air.

[0023] At this point, the minimum length of the positioning hole 221 can be 0.3mm, and the minimum width is 0.2mm. Without affecting the fitting accuracy with the positioning post, the minimum size of the positioning hole 221 improves sealing reliability. The depth H of the positioning blind hole 112 can exceed one side surface of the dome 2 by 0.03mm-0.08mm. In specific implementations, it can be flexibly set as needed, for example, 0.04mm, 0.05mm, 0.06mm, etc. In the embodiment shown in the figure, it is 0.05mm. Thus, even under long-term water or air pressure, moisture and dust cannot penetrate through the interface between the dome 2 and the diaphragm 1, further strengthening and ensuring the overall waterproof performance. In the length direction of the dome 2, the size of the positioning hole 221 can not exceed 1 / 3 of the total length of the dome 2; in the width direction of the dome 2, the size of the positioning hole 221 cannot exceed 1 / 3 of the total width of the dome. Thus, without affecting the fitting accuracy with the positioning post, the small-sized positioning hole 221 can maintain the structural strength and rigidity of the dome 2, improving the reliability of the device.

[0024] Structural Form Two: In other embodiments of this utility model, such as Figure 5 As shown, the positioning hole 221 can be a circular hole. In this way, the circular hole makes the positioning more accurate; when the dome 2 vibrates, it will drive the surrounding airflow, and the circular outline of the hole can prevent the airflow from forming eddies inside the hole, thus improving the sound quality.

[0025] At this point, the minimum diameter of the positioning hole 221 can be 0.2 mm, and the maximum diameter cannot exceed 1 / 3 of the width of the dome 2. Without affecting the fitting accuracy with the positioning post, the minimum size of the positioning hole 221 improves sealing reliability while maintaining the structural strength and rigidity of the dome 2, thus enhancing the reliability of the device. The edge of the positioning hole 221 can be at least 0.2 mm away from the outer edge of the dome 2. This ensures that the positioning hole 221 is located away from the stress concentration area (the folded ring portion), effectively mitigating the problem of waterproof membrane rupture.

[0026] In some embodiments of this utility model, the position of the positioning hole 221 can be set in various ways that are easily conceived by those skilled in the art. When setting the position of the positioning hole 221, the two structural forms of the positioning hole 221 can be flexibly selected according to the usage requirements. In specific implementation, if the positioning hole 221 of structural form one (C-shaped notch or U-shaped notch) is used, the opening position is entirely located at the edge of the dome 2. If the positioning hole 221 of structural form two (circular hole) is used, the edge of the positioning hole 221 can be at least 0.2 mm away from the outer edge of the dome 2. Specifically, the following embodiments can be included: Example

[0027] like Figure 1As shown, the positioning hole 221 in this embodiment is a U-shaped notch. The positioning hole 221 can be located only on the long side of the dome 2, with two positioning holes 221 on each long side of the dome 2, and the positioning holes 221 located on both sides of the long side. This symmetrical layout of the opening method, with two positioning holes 221 on each long side and the positioning holes 221 located on both sides of the long side, enhances the overall rigidity and avoids the mass imbalance caused by asymmetrical openings, thereby preventing unnecessary vibration of the speaker during operation and affecting the sound quality. Example

[0028] like Figure 2 As shown, the positioning hole 221 in this embodiment is a U-shaped notch. The positioning hole 221 is only located on the short side of the dome 2, and each short side of the dome 2 has one positioning hole 221, with the positioning hole 221 located at the center of the short side. By providing only one positioning hole 221 at the center of each short side, positioning can be achieved, and the stress concentration and tearing risks caused by edge openings can be avoided, which is beneficial to maintaining the structural strength of the short side. Example

[0029] like Figure 3 As shown, the positioning hole 221 in this embodiment is a U-shaped notch. The positioning hole 221 is located on the long side and the short side of the dome 2, with one positioning hole 221 on each side of the dome 2 and the positioning hole 221 located at the center of each side. In this way, when the dome 2 vibrates, the stress is transmitted from the edge to the center. Because the positioning holes 221 at the centers of the four sides are symmetrically distributed, the stress release path around each positioning hole 221 is completely consistent, avoiding local overload. Example

[0030] like Figure 4 As shown, the positioning hole 221 in this embodiment is a U-shaped notch. The positioning hole 221 is located on the long side and the short side of the dome 2. Each long side of the dome 2 has two positioning holes 221, which are located on both sides of the long side. Each short side of the dome 2 has one positioning hole 221, which is located at the center of the short side. The six symmetrically distributed positioning holes 221 further improve the stability and overall strength between the dome 2 and the diaphragm 1. Example

[0031] like Figure 5 As shown, the positioning hole 221 in this embodiment is a circular hole. The arrangement of the positioning holes 221 is the same as in Embodiment 1 above, and will not be described again here.

[0032] It is worth noting that the positioning holes 221 in the above embodiments are the minimum number, and the number of positioning holes 221 can be increased according to the size of the product.

[0033] like Figure 7As shown in the stress cloud diagram, A in the diagram represents the position of the positioning blind hole 112 before improvement (in the prior art), and B in the diagram represents the position of the positioning blind hole 112 after improvement (in this utility model). Compared with the prior art, this utility model places the positioning post of the diaphragm injection mold at the opening of the dome 2 (positioning hole 221). The positioning blind hole 112 formed during the injection process is far away from the stress concentration area (folded ring part). The stress at the positioning blind hole 112 position is reduced from 15 MPa to 9 MPa, which can effectively improve the problem of waterproof membrane breakage.

[0034] In some embodiments of this invention, the middle region 21 of the dome 2 is provided with a dumbbell-shaped reinforcing protrusion 211 along the length direction. The dumbbell shape (wide at both ends and narrow in the middle) can provide strong longitudinal stiffness, effectively suppressing segmented vibration along the length direction, thereby significantly reducing high-frequency distortion.

[0035] On the other hand, this utility model embodiment provides a sound-generating device, such as... Figure 8 As shown, it includes a housing and a vibration system and a magnetic circuit system housed within the housing, wherein: The magnetic circuit system includes a support plate 201 and two magnetic components 202 spaced apart on the support plate 201, with a magnetic gap formed between the two magnetic components. The vibration system includes the diaphragm assembly 100 described above and a voice coil 301 for driving the diaphragm assembly 100 to vibrate. The axial direction of the voice coil 301 is perpendicular to the vibration direction of the diaphragm assembly 100, and the voice coil 301 is disposed in the magnetic gap.

[0036] The structure of the diaphragm assembly 100 is the same as above, and will not be described again here.

[0037] The sound-generating device of this utility model includes a diaphragm assembly 100. The outer periphery 22 of the dome 2 is provided with a positioning hole 221, which is used to accommodate the positioning post of the injection mold, ensuring that the position of the dome 2 in the central hole 111 of the diaphragm 1 is highly accurate and preventing displacement or rotation. The outer periphery 22 of the dome 2 is embedded in the central hole 111 of the central part 11 of the diaphragm 1, and the central part 11 of the diaphragm 1 is covered by injection molding of the outer periphery 22 of the dome 2, which greatly enhances the connection strength between the dome 2 and the diaphragm 1. Moreover, this design forms a sealed environment, reducing the possibility of moisture seeping in through gaps. Compared with the prior art where the positioning position is directly placed on the outer edge of the dome 2, in this utility model, the edge position (outer periphery 22) of the dome 2 is opened to form the positioning hole 221, and the positioning post of the diaphragm injection mold is placed at the position of the positioning hole 221. The positioning blind hole 112 formed on the diaphragm 1 during the injection molding process is far away from the stress concentration area (folded ring part), which effectively improves the problem of waterproof membrane breakage and greatly improves the waterproof level of the device.

[0038] Furthermore, the two magnetic circuit components 202 of the magnetic circuit system are spaced apart on the support plate 201, forming a magnetic gap between them. The voice coil 301 is inserted into the magnetic gap on the side away from the diaphragm assembly 100. In this way, the voice coil 301 can vibrate under the drive of the magnetic circuit system when energized, thereby driving the diaphragm assembly 100 connected to the voice coil 301 to vibrate and produce sound, thus enabling the sound-producing device to have a sound-producing function. At the same time, by setting the voice coil 301 to a flat shape, compared with the sound-producing device with a ring voice coil and a ring magnetic gap, the structure of the sound-producing device of this utility model is more compact and occupies less assembly space.

[0039] In some embodiments of this utility model, such as Figure 8 As shown in Figure (a), each magnetic component 202 may include a first magnetic guide plate 2021, a first magnet 2022, a second magnetic guide plate 2023, and a second magnet 2024 stacked sequentially along the vibration direction. The second magnet 2024 is connected to the support plate 201. The first magnet 2022 and the second magnet 2024 of each magnetic component 202 are magnetized along the vibration direction and the magnetization directions are opposite. The magnetization directions of the first magnets 2022 of the two magnetic components 202 are opposite. The support plate 201 is a magnetic guide plate. In the figure, 203 is the front cover, 204 is the silicone ring, 205 is the upper shell, 206 is the lower shell, and 207 is the FPC.

[0040] Thus, the voice coil 301 experiences a large driving force and a fast start-up speed. However, this design is not limited to this. In some other embodiments, only one first magnet 2022 and one second magnet 2024 may be provided, with the voice coil 301 positioned between the first magnet 2022 and the second magnet 2024. In other still embodiments, three or more first magnets 2022 may be provided. For these three or more first magnets 2022, the magnetization directions of any two adjacent first magnets 2022 are opposite. The number and position of the second magnets 2024 are then set accordingly. In this case, the number of voice coils 301 is increased accordingly. One voice coil 301 can be configured between each pair of first magnets 2022 and second magnets 2024. Multiple voice coils 301 are arranged sequentially along the vibration direction of the diaphragm 1 and fixed together sequentially.

[0041] Or, such as Figure 8 As shown in (b), each magnetic component 202 includes a first magnet 2025, a second magnet 2026 and a third magnet 2027 arranged sequentially along the vibration direction. The third magnet 2027 is disposed on the support plate 201. The first magnet 2025 and the third magnet 2027 are both magnetized in a direction perpendicular to the vibration direction and in opposite directions. The second magnet 2026 is magnetized along the vibration direction, and the polarity of the magnetic pole of the second magnet 2026 facing the first magnet 2025 is the same as the polarity of the magnetic pole of the first magnet 2025 near the magnetic gap.

[0042] Furthermore, this utility model embodiment provides an electronic device including the aforementioned sound-generating device. The structure of the sound-generating device is the same as above, and will not be repeated here. The electronic device can be a controller, mobile phone, smart wearable device, virtual reality device, augmented reality device, mixed reality device, or extended reality device, etc. Since the electronic device proposed in this application applies all the technical solutions of all the foregoing embodiments, it possesses at least all the beneficial effects brought by all the foregoing technical solutions, which will not be elaborated upon here.

[0043] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component 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 utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A diaphragm assembly, characterized in that, include: A diaphragm, comprising a central portion, a folded ring portion, and a fixing portion, wherein a central hole is provided on the central portion, the folded ring portion surrounds the outer periphery of the central portion and is connected to the central portion, and the fixing portion surrounds the outer periphery of the folded ring portion and is connected to the folded ring portion; The dome includes a central region and a peripheral region surrounding the central region. The peripheral region has a positioning hole for accommodating a positioning post of an injection mold. The peripheral region is embedded in the central hole and injection molded together with the central portion, thereby the central portion covers the peripheral region and a positioning blind hole is formed at the position of the central portion corresponding to the positioning hole.

2. The diaphragm assembly according to claim 1, characterized in that, The positioning hole is a C-shaped notch or a U-shaped notch.

3. The diaphragm assembly according to claim 2, characterized in that, The minimum length of the positioning hole is 0.3 mm, and the minimum width is 0.2 mm. And / or, the depth of the positioning blind hole exceeds one side surface of the dome by 0.03mm-0.08mm; And / or, in the length direction of the dome, the size of the positioning hole does not exceed 1 / 3 of the total length of the dome, and in the width direction of the dome, the size of the positioning hole does not exceed 1 / 3 of the total width of the dome.

4. The diaphragm assembly according to claim 1, characterized in that, The positioning hole is a round hole.

5. The diaphragm assembly according to claim 4, characterized in that, The minimum diameter of the positioning hole is 0.2 mm, and the maximum diameter does not exceed 1 / 3 of the width of the dome. And / or, the edge of the positioning hole is at least 0.2 mm away from the outer edge of the dome.

6. The diaphragm assembly according to any one of claims 1-5, characterized in that, The positioning holes are located only on the long side of the dome, and each long side of the dome is provided with two positioning holes, with the positioning holes located on both sides of the long side; Alternatively, the positioning hole may be located only on the short side of the dome, with each short side of the dome having one positioning hole and the positioning hole located at the center of the short side; Alternatively, the positioning hole is located on the long side and the short side of the dome, with each side of the dome having one positioning hole and the positioning hole being located at the center of each side; Alternatively, the positioning holes are located on the long and short sides of the dome, with two positioning holes on each long side of the dome and the positioning holes located on both sides of the long side, and one positioning hole on each short side of the dome and the positioning hole located at the center of the short side.

7. The diaphragm assembly according to claim 6, characterized in that, The central region of the dome has a dumbbell-shaped reinforcing protrusion along its length.

8. A sound-generating device, characterized in that, Includes a housing and a vibration system and a magnetic circuit system housed within the housing, wherein: The magnetic circuit system includes a support plate and two magnetic components spaced apart on the support plate, with a magnetic gap formed between the two magnetic components. The vibration system includes a diaphragm assembly as described in any one of claims 1-7 and a voice coil for driving the diaphragm assembly to vibrate, wherein the axial direction of the voice coil is perpendicular to the vibration direction of the diaphragm assembly, and the voice coil is disposed in the magnetic gap.

9. The sound-generating device according to claim 8, characterized in that, Each magnetic component includes a first magnetic guide plate, a first magnet, a second magnetic guide plate, and a second magnet stacked sequentially along the vibration direction. The second magnet is connected to the support plate. The first magnet and the second magnet of each magnetic component are magnetized along the vibration direction but in opposite directions. The first magnets of the two magnetic components are magnetized in opposite directions. The support plate is a magnetic guide plate. Alternatively, each of the magnetic components includes a first magnet, a second magnet, and a third magnet arranged sequentially along the vibration direction, with the third magnet disposed on the support plate. The first magnet and the third magnet are both magnetized in a direction perpendicular to the vibration direction but in opposite directions. The second magnet is magnetized along the vibration direction, and the polarity of the second magnet toward the first magnet is the same as the polarity of the first magnet's pole near the magnetic gap.

10. An electronic device, characterized in that, Includes the sound-generating device as described in claim 8 or 9.

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