Sound production device and electronic device
By designing the folded ring and the inclined setting of the sealing structure, the problem of poor acoustic performance caused by the fixed connection between the diaphragm and the sealing ring was solved, and better acoustic and waterproof performance was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MERRY ELECTRONICS (SUZHOU) CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-06-23
AI Technical Summary
In existing sound-generating devices, the diaphragm is fixedly connected to the sealing ring, which causes the sealing ring to move, affecting acoustic performance and waterproof performance.
Design a diaphragm structure including a folded ring and a sealing structure. The inner and outer sides of the sealing structure have different angles and are inclined to reduce displacement. The sealing area is increased by the supporting structure of the outer shell to improve waterproof performance.
It improves the acoustic and waterproof performance of the diaphragm, ensures stable vibration amplitude and frequency, increases the sealing area, and enhances the sealing effect.
Smart Images
Figure CN224401671U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sound energy conversion technology, and in particular to a sound generating device and electronic equipment. Background Technology
[0002] A sound-generating device is a sound energy conversion device widely used in electronic devices such as mobile phones, computers, and smart wearable products. As the waterproof performance requirements of electronic devices increase, the waterproof performance requirements for sound-generating devices are also gradually increasing.
[0003] In existing technology, sound-generating devices typically include a housing, a magnetic circuit system, and a vibration system, with both the magnetic circuit system and the vibration system connected to the housing. The vibration system includes a diaphragm and a dome located in the central region of the diaphragm, with the diaphragm connected to the top of the housing. To improve the sealing and waterproofing performance of the sound-generating device, a sealing ring is usually provided on the top surface of the housing. During assembly, the sound-generating device achieves a tight seal between the fixing surface of the electronic device and the sealing ring, thus sealing and waterproofing the internal structure of the sound-generating device. To further enhance the waterproofing performance of the sound-generating device, the diaphragm is fixedly connected to the sealing ring, thereby ensuring the waterproofing performance between the diaphragm and the sealing ring.
[0004] However, since the diaphragm is fixedly connected to the sealing ring, and when the sealing ring is applied to the fixed surface of the electronic device during the assembly of the sound-generating device, the sealing ring will move up and down relative to the outer shell, which in turn will cause the diaphragm to move up and down relative to the outer shell, thus affecting the acoustic performance of the sound-generating device. Utility Model Content
[0005] The first objective of this invention is to provide a sound-generating device to solve the technical problem of poor acoustic performance in the prior art.
[0006] The second objective of this invention is to provide an electronic device with high acoustic performance.
[0007] Based on the above concept, the technical solution adopted by this utility model is as follows:
[0008] The sound-generating device includes:
[0009] shell;
[0010] A magnetic circuit system is connected to the housing, and the magnetic circuit system is provided with a magnetic gap;
[0011] A vibration system includes a diaphragm and a voice coil for driving the diaphragm to vibrate. The diaphragm includes a folded ring portion, a sealing structure connected to a housing, and a vibrating plate connected to the folded ring portion. The sealing structure surrounds the folded ring portion. The sealing structure includes a connecting pressing portion and a first connecting portion. The angle between the inner surface of the pressing portion and a dashed line parallel to a second direction is a first angle, and the angle between the outer surface of the pressing portion and a dashed line parallel to the second direction is a second angle. The first angle is smaller than the second angle. The first connecting portion is connected to the folded ring portion, and the second direction is perpendicular to the axial direction of the sealing structure.
[0012] In one embodiment, the area of the inner side of the pressing part is larger than the area of the outer side of the pressing part.
[0013] In one embodiment, the outer shell has a third groove on its surface facing the sealing structure, and the end of the first connecting portion away from the pressing portion has a protrusion extending in a first direction, the protrusion being located close to the outer circumferential surface of the sealing structure; the protrusion and the third groove cooperate with each other, and the protrusion is located in the third groove; the first direction is the axial direction of the sealing structure.
[0014] In one embodiment, the magnetic circuit system includes a magnetic circuit assembly, a magnetic guide assembly, and a centering support. The magnetic circuit assembly has the magnetic gap, and one end of the voice coil away from the diaphragm is located within the magnetic gap. The centering support is disposed between the magnetic guide assembly and the magnetic circuit assembly, and one end of the centering support is electrically connected to the voice coil, while the other end is connected to the magnetic guide assembly via a gasket.
[0015] In one embodiment, the centering support includes a fixed portion and an elastic arm connected together, an electrical connection portion is formed on the elastic arm, the electrical connection portion is electrically connected to the voice coil, and the fixed portion is connected to the gasket.
[0016] In one embodiment, the surface of the housing facing the sealing structure has a first protrusion, the sealing structure has a second groove that mates with the first protrusion, the first protrusion is located in the second groove, and the surface of the sealing structure facing the housing is connected to the surface of the housing facing the sealing structure.
[0017] In one embodiment, the inner side of the housing is provided with a second protrusion, and the diaphragm further includes a second connecting portion, which is connected between the first connecting portion and the folded ring portion. The second connecting portion is provided with a first groove that mates with the second protrusion; the second protrusion is located in the first groove.
[0018] In one embodiment, the diaphragm further includes a folded edge portion located outside the folded ring portion and spaced apart from the folded ring portion in the second direction; the folded edge portion contacts both the second protrusion and the inner surface of the housing.
[0019] In one embodiment, the end face of the pressing portion away from the first connecting portion is an arc surface.
[0020] Electronic devices, including the sound-generating devices described above.
[0021] The beneficial effects of this utility model are:
[0022] The diaphragm of the sound-generating device includes a folded ring portion and a sealing structure. The sealing structure includes a pressing portion and a first connecting portion. The angle between the inner surface of the pressing portion and a dashed line parallel to the second direction is the first angle, and the angle between the outer surface of the pressing portion and the dashed line parallel to the second direction is the second angle. The first angle is smaller than the second angle, causing the end of the pressing portion away from the first connecting portion to tilt outward. When the mounting surface applies a force to the pressing portion of the sealing structure, the pressing portion tilts in the direction away from the folded ring portion. The tilting direction of the pressing portion causes the end of the pressing portion in contact with the mounting surface (or the end of the pressing portion away from the first connecting portion) to flip outward. Supported by the housing of the sound-generating device, the displacement of the folded ring portion due to the movement of the sealing structure is small, or the folded ring portion does not shift due to the movement of the pressing portion of the sealing structure. This ensures that the installation position of the folded ring portion meets the design requirements, guarantees the vibration amplitude and frequency of the folded ring portion, and thus improves the acoustic performance of the diaphragm. Furthermore, the pressure-retaining part tilts under pressure, allowing for a larger contact area between the pressure-retaining part and the mounting surface. This increases the sealing area, improves the sealing effect, and effectively enhances waterproof performance. Sound-generating devices using diaphragms exhibit superior acoustic performance.
[0023] Furthermore, the pressure-retaining part tilts after being pressed, allowing for a larger contact area between the pressure-retaining part and the mounting surface of the electronic device, thereby increasing the sealing area, improving the sealing effect, and effectively enhancing the waterproof performance. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the structure of a sound-generating device provided in an embodiment of the present invention;
[0026] Figure 2 This is an exploded view of a sound-generating device provided in an embodiment of the present invention;
[0027] Figure 3 This is a top view of a sound-generating device provided in an embodiment of the present invention;
[0028] Figure 4 This is provided by an embodiment of the present invention. Figure 3 The AA section view shown;
[0029] Figure 5 This is provided by an embodiment of the present invention. Figure 4 The enlarged view at point C is shown below;
[0030] Figure 6 This is provided by an embodiment of the present invention. Figure 3 A partially enlarged view of the BB cross-sectional view shown;
[0031] Figure 7 This is a schematic diagram of the structure of a diaphragm provided in an embodiment of the present invention;
[0032] Figure 8 This is a cross-sectional view of a diaphragm provided in an embodiment of the present invention;
[0033] Figure 9 This is a schematic diagram of the structure of the outer shell provided in an embodiment of the present invention;
[0034] Figure 10 This is a cross-sectional view of a sound-generating device in an exploded state according to an embodiment of the present invention;
[0035] Figure 11 This is a cross-sectional view of a sound-generating device provided in an embodiment of the present invention;
[0036] Figure 12 This is an exploded view of the centering support and gasket provided in an embodiment of the present invention;
[0037] Figure 13 This is a schematic diagram showing the deformation of a sealing structure provided in an embodiment of the present invention after being compressed by the mounting surface;
[0038] Figure 14 This is a schematic diagram illustrating the deformation of a seal after being compressed by the mounting surface, according to an embodiment of the present invention.
[0039] In the picture:
[0040] 1. Outer shell; 11. First protrusion; 12. Second protrusion; 13. Third groove;
[0041] 2. Magnetic circuit system; 21. Magnetic gap; 22. Magnetic circuit assembly; 221. Magnet; 222. Magnetic yoke; 23. Magnetic conductive assembly; 230. Through hole; 231. First magnetic conductor; 232. Second magnetic conductor; 24. Centering support; 241. Fixing part; 242. Elastic arm; 243. Electrical connection part; 25. Gasket;
[0042] 3. Vibration system; 31. Diaphragm; 311. Hoop; 312. Sealing structure; 3120. Pressing part; 3121. First connecting part; 3122. First inclined surface; 3123. Second inclined surface; 3124. Arc surface; 3126. Protrusion; 3127. Second groove; 313. Second connecting part; 3131. First groove; 314. Folded edge; 32. Voice coil; 33. Vibrating plate;
[0043] Z, first direction; X, second direction; L, dashed line;
[0044] 100, Seal; 200, Mounting surface; 300, Diaphragm structure; 400, Frame. Detailed Implementation
[0045] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.
[0046] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do 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.
[0047] 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.
[0048] In the description of this utility model, unless otherwise explicitly 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 utility model based on the specific circumstances.
[0049] In this utility model, unless otherwise explicitly 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.
[0050] 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 ease 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 utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.
[0051] 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.
[0052] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0053] Figure 14This embodiment simulates the deformation of the speaker's seal 100 when it is installed in an electronic device. When the mounting surface 200 of the electronic device presses against the seal 100, the seal 100 tilts inward, causing the frame 400 to tilt inward as well, with a displacement of 0.01 mm. Simultaneously, the seal 100 also causes the diaphragm structure 300 to move downward, with a displacement of 0.02 mm. Thus, the position of the diaphragm structure 300 deviates from its designed position, affecting its acoustic performance, including vibration amplitude and frequency.
[0054] Therefore, this embodiment provides a sound-generating device that has good acoustic performance. The sound-generating device in this embodiment can be a loudspeaker.
[0055] For example, such as Figures 1 to 12 As shown, the sound-generating device includes a housing 1, a magnetic circuit system 2, and a vibration system 3. The magnetic circuit system 2 is connected to the housing 1 and has a magnetic gap 21. The vibration system 3 includes the aforementioned diaphragm 31 and a voice coil 32 for driving the diaphragm 31 to vibrate. One end of the voice coil 32 is connected to the diaphragm 31, and the other end of the voice coil 32 is located within the magnetic gap 21. When energized, the voice coil 32 interacts with the magnetic circuit system 2, causing the voice coil 32 to vibrate in the first direction Z, thereby driving the diaphragm 31 to vibrate in the first direction Z to generate sound.
[0056] For example, such as Figure 1 As shown, the sound-generating device has a narrow and elongated shape. It should be noted that the sound-generating device has a height (thickness) along the first direction Z, and a length and width along a direction perpendicular to the first direction Z. The length of the sound-generating device is greater than its width.
[0057] It should be noted that, as Figure 4 As shown, the diaphragm 31 is mounted on the top of the housing 1, and the magnetic circuit system 2 is mounted on the bottom of the housing 1.
[0058] For example, such as Figure 4 As shown, the diaphragm 31 includes a folded ring portion 311 and a sealing structure 312. The folded ring portion 311 is connected to the sealing structure 312. The folded ring portion 311 is annular, and in some optional embodiments, such as Figure 2 As shown, the folded ring portion 311 is racetrack-shaped. A sealing structure 312 is disposed around the folded ring portion 311, and the sealing structure 312 is connected between the mounting surface of the electronic device and the housing 1 for sealing. In this embodiment, the sealing structure 312 is connected to the housing 1, for example, one end of the sealing structure 312 in the first direction Z is connected to the housing 1. In this embodiment, the sealing structure 312 is connected to the housing 1, and the folded ring portion 311 is disposed inside the housing 1.
[0059] The sealing structure 312 includes a pressing portion 3120 and a first connecting portion 3121. The pressing portion 3120 and the first connecting portion 3121 are arranged in a first direction Z. The end of the pressing portion 3120 facing away from the first connecting portion 3121 is used to contact the mounting surface 200 of the electronic device; that is, the end of the pressing portion 3120 facing away from the first connecting portion 3121 is the part of the sealing structure 312 that first contacts the mounting surface 200 of the electronic device. The first direction Z refers to the height direction or the axial direction of the sealing structure 312.
[0060] In this embodiment, both the pressing portion 3120 and the first connecting portion 3121 are annular, and the pressing portion 3120 has an inner side facing the folded ring portion 311 and an outer side facing away from the folded ring portion 311. Figure 5 As shown, the angle between the inner side of the pressing part 3120 and the dummy line L parallel to the second direction X is the first included angle a, and the angle between the outer side of the pressing part 3120 and the dummy line L parallel to the second direction X is the second included angle b. The first included angle a is smaller than the second included angle b.
[0061] Wherein, the second direction X is perpendicular to the first direction Z. For example, the second direction X can be the width direction of the sealing structure 312, the length direction of the sealing structure 312, or a direction between the width direction and the length direction of the sealing structure 312. This embodiment does not limit this.
[0062] It should be noted that the dummy line L is not a real line, but a line drawn to describe the relationship between the inner and outer surfaces of the pressing part 3120.
[0063] It should also be noted that the first included angle α is the angle between the dummy line L and the inner surface of the pressing part 3120. Therefore, the first included angle α is greater than 0 degrees and less than 90 degrees. The second included angle b is the angle between the dummy line L and the outer surface of the pressing part 3120. Therefore, the second included angle b is greater than 0 degrees and less than 90 degrees.
[0064] It should also be noted that the inner surface of the pressing part 3120 is the surface of the pressing part 3120 facing the folded ring part 311, and the outer surface of the pressing part 3120 is the surface of the pressing part 3120 away from the folded ring part 311.
[0065] The first included angle 'a' is set to be smaller than the second included angle 'b', causing the end of the pressing portion 3120 away from the first connecting portion 3121 to be inclined outwards. When the mounting surface 200 applies a force to the pressing portion 3120 of the sealing structure 312, the pressing portion 3120 is inclined in the direction away from the folded ring portion 311. For example, in Figure 5 In the middle, the pressure part 3120 can be generated in Figure 5The clockwise torque is shown in the orientation. The tilting direction of the pressing part 3120 causes the end of the pressing part 3120 that contacts the mounting surface 200 (or the end of the pressing part 3120 that is away from the first connecting part 3121) to flip outward. Under the support of the housing 1 of the sound-generating device, the displacement of the folded ring part 311 due to the movement of the sealing structure 312 is small, or the folded ring part 311 will not be displaced due to the movement of the pressing part 3120 of the sealing structure 312. This ensures that the installation position of the folded ring part 311 meets the design requirements, guarantees the vibration amplitude and vibration frequency of the folded ring part 311, and thus improves the acoustic performance of the diaphragm 31. Furthermore, the pressing part 3120 tilts after being pressed, allowing for a larger contact area between the pressing part 3120 and the mounting surface 200, thereby increasing the sealing area, improving the sealing effect, and effectively enhancing the waterproof performance.
[0066] In some embodiments, the pressing part 3120 and the first connecting part 3121 can be an integral structure, that is, the sealing structure 312 is a single structure, artificially divided into the pressing part 3120 and the first connecting part 3121 for ease of understanding. Therefore, the boundary line between the pressing part 3120 and the first connecting part 3121 can be set according to actual needs. In other embodiments, the pressing part 3120 and the first connecting part 3121 can also be separate structures, which is not limited in this embodiment.
[0067] In at least one implementation, such as Figure 5 As shown, the inner surface of the pressing part 3120 is called the first inclined surface 3122, and the outer surface of the pressing part 3120 is called the second inclined surface 3123. The area of the first inclined surface 3122 is larger than the area of the second inclined surface 3123. This arrangement allows the end of the sealing structure 312 away from the first connecting part 3121 to be inclined outwards. When the pressing part 3120 contacts the mounting surface 200, the first inclined surface 3122 deforms along with the pressing part 3120, so that at least a portion of the first inclined surface 3122 contacts the mounting surface 200, thereby improving the sealing performance.
[0068] Optionally, in this embodiment, the longitudinal section of the sealing structure 312 gradually increases from the abutment portion 3120 toward the first connecting portion 3121.
[0069] In at least one embodiment, the end face of the pressing part 3120 away from the first connecting part 3121 is an arc surface 3124. The arc surface 3124 is used to contact the mounting surface 200, so that the surface area of the pressing part 3120 in contact with the mounting surface 200 is larger, thereby further improving the waterproof and sealing effect.
[0070] In one embodiment, the folded ring 311 and the sealing structure 312 are integrally formed. The folded ring 311 and the sealing structure 312 can be obtained simultaneously in a single manufacturing process. For example, the folded ring 311 and the sealing structure 312 can be manufactured by injection molding, 3D printing, or other methods.
[0071] In order to balance the sealing and vibration effects of the diaphragm 31, the material of the diaphragm 31 in this embodiment can be silicone, rubber, or other materials.
[0072] In some alternative embodiments, such as Figure 4 or Figure 7 As shown, the diaphragm 31 also includes a second connecting portion 313. The second connecting portion 313 connects the first connecting portion 3121 and the folded ring portion 311. In this embodiment, as... Figure 8 As shown, the second connecting part 313 is provided with a first groove 3131, which is used to cooperate with the housing 1 of the sound-generating device to improve the sealing effect and also improve the connection strength between the diaphragm 31 and the housing 1. By providing the second connecting part 313, the relative position of the sealing structure 312 and the folded ring part 311 can be more flexible.
[0073] To accommodate the shape of the diaphragm 31, the outer casing 1 in this embodiment is annular, and the outer casing 1 has inner and outer surfaces opposite each other in the second direction X. In at least one embodiment, such as Figure 5 or Figure 9 As shown, the inner side of the outer casing 1 is provided with a second protrusion 12, which cooperates with the first groove 3131 and is located inside the first groove 3131.
[0074] By providing a first groove 3131 and a second protrusion 12 that cooperate with each other, on the one hand, the second protrusion 12 can support the second connecting part 313 in the first direction Z, thereby achieving support for the diaphragm 31 in the first direction Z. Since the second protrusion 12 is located on the inner side of the outer casing 1, it can prevent the pressing part 3120 from tilting inward under the support of the second protrusion 12, allowing the pressing part 3120 to tilt smoothly outward. Furthermore, under the limitation of the second protrusion 12, the second connecting part 313 will move along the first direction Z, thereby preventing the folded ring part 311 from moving in the first direction Z, ensuring the position of the folded ring part 311 relative to the outer casing 1, and thus ensuring the acoustic performance of the diaphragm 31. On the other hand, the cooperation between the second protrusion 12 and the first groove 3131 can also improve the sealing effect between the diaphragm 31 and the outer casing 1.
[0075] In some alternative embodiments, the second connecting portion 313 is connected to the inner side of the housing 1, and together with the second protrusion 12 and the first groove 3131, a double sealing structure can be formed to further improve the sealing effect between the diaphragm 31 and the housing 1.
[0076] It should be noted that, as Figure 4 As shown, the portion of the diaphragm 31 located on one end face in the axial direction of the housing 1 is the sealing structure 312, that is, the sealing structure 312 does not include the portion located inside the housing 1. The portion of the diaphragm 31 that forms a U-shaped structure is the folded ring portion 311, and the portion located between the sealing structure 312 and the folded ring portion 311 is the second connecting portion 313.
[0077] In at least one embodiment, such as Figure 5 or Figure 7 As shown, the diaphragm 31 also includes a folded edge portion 314 connected to the second connecting portion 313. The folded edge portion 314 is located outside the folded ring portion 311. Furthermore, the folded edge portion 314 and the folded ring portion 311 are spaced apart in the second direction X. The folded edge portion 314 is used to contact the inner wall of the housing 1 to support the entire diaphragm 31, reducing the probability of the diaphragm 31 tilting inward under the pressure of the mounting surface 200, and thus reducing the risk of displacement of the folded ring portion 311 in the first direction Z during assembly.
[0078] It should be noted that, as Figure 7 As shown, in this embodiment, both the second connecting part 313 and the folded edge part 314 are annular to provide a higher support effect, and the overall strength of the diaphragm 31 is also greater.
[0079] In at least one embodiment, the folded edge 314 contacts the inner surface of the outer casing 1. The folded edge 314 provides support for the folded ring 311 in the second direction X, reducing the risk of the folded ring 311 moving and deforming in the second direction X. Furthermore, the folded edge 314 also supports the second connecting portion 313, reducing the risk of the second connecting portion 313 moving inwards, and further reducing the risk of the pressing portion 3120 tilting inwards after being pressed, thus ensuring that the pressing portion 3120 tilts smoothly outwards.
[0080] In some implementations, the folded edge 314 can be fixedly connected to the inner side of the housing 1; in other embodiments, the folded edge 314 is tightly fitted to the inner side of the housing 1, and this embodiment does not limit this.
[0081] Optionally, such as Figure 5As shown, the folded edge 314 can also contact the second protrusion 12. The folded edge 314 can be connected to or not connected to the second protrusion 12. With this configuration, the second protrusion 12 can support the folded edge 314, reducing the risk of the folded edge 314 moving relative to the second protrusion 12 in the first direction Z.
[0082] In this embodiment, the longitudinal section of the folded edge 314 is an inverted "L" shape, and the folded edge 314 extends in a direction away from the second protrusion 12.
[0083] For example, in this embodiment, the folded ring portion 311, the sealing structure 312, the second connecting portion 313, and the folded edge portion 314 are an integral structure. In this way, the integrity of the diaphragm 31 can be improved, making it easier for the diaphragm 31 to be assembled in the sound-generating device. Furthermore, the diaphragm 31 itself has high waterproof sealing performance, so it is only necessary to improve the sealing between the diaphragm 31 and other components.
[0084] In some alternative embodiments, such as Figure 5 As shown, Figure 10 As shown, the first connecting portion 3121 has a protrusion 3126 extending in the first direction Z at one end opposite to the pressing portion 3120. The protrusion 3126 can connect with the housing 1, further reducing the risk of the diaphragm 31 tilting inward.
[0085] In at least one possible implementation, such as Figure 10 and Figure 11 As shown, the outer casing 1 has a third groove 13 on its surface facing the sealing structure 312, and a protrusion 3126 is disposed close to the outer ring surface of the sealing structure 312. That is, the distance between the protrusion 3126 and the outer ring surface of the sealing structure 312 is less than the distance between the protrusion 3126 and the inner ring surface of the sealing structure 312. The protrusion 3126 and the third groove 13 cooperate with each other, and the protrusion 3126 is located in the third groove 13.
[0086] Through the cooperation of the protrusion 3126 and the third groove 13, on the one hand, the supporting force of the outer shell 1 on the outer side of the pressing part 3120 will be weakened, which is conducive to the end of the pressing part 3120 away from the first connecting part 3121 tilting outward; on the other hand, the arrangement of the protrusion 3126 and the third groove 13 can also limit the position of the pressing part 3120 relative to the outer shell 1, and at the same time improve the waterproof sealing performance of the sealing structure 312 and the outer shell 1.
[0087] Optionally, in this embodiment, the protrusion 3126 is arranged in a ring shape on the sealing structure 312, and the third groove 13, which cooperates with the protrusion 3126, is also in a ring shape.
[0088] In some alternative embodiments, the outer surface of the protrusion 3126 in the second direction X is flush with the outer annular surface of the sealing structure 312 to facilitate the placement of the protrusion 3126. The protrusion 3126 and the sealing structure 312 can be an integral structure.
[0089] The diaphragm 31 provided in this embodiment has a relatively simple structure and can reduce the risk of the end of the pressing part 3120 away from the first connecting part 3121 tilting inward when assembled into an electronic device, reduce the displacement of the folded ring part 311 in the first direction Z, ensure that the diaphragm 31 is located in the designed position, and thus ensure the acoustic performance of the diaphragm 31, such as vibration amplitude and vibration frequency.
[0090] Figure 13 This describes the deformation of the sealing structure 312 provided in this embodiment after being subjected to pressure from the mounting surface 200. From... Figure 13 As can be seen, the sealing structure 312 is inclined outward, and the outer shell 1 and the folding ring 311 do not produce obvious displacement in the first direction Z and the second direction X.
[0091] In at least one embodiment, such as Figure 5 As shown, the surface of the outer casing 1 facing the sealing structure 312 has a first protrusion 11. Specifically, the first protrusion 11 is located on one end face of the outer casing 1 in the first direction Z. Figure 8 As shown, the sealing structure 312 is provided with a second groove 3127 that mates with the first protrusion 11. The first protrusion 11 is located in the second groove 3127. By providing the mutually mating second groove 3127 and the first protrusion 11, the first protrusion 11 can restrict the position of the sealing structure 312 in the second direction X, reducing the risk of the sealing structure 312 moving in the second direction X when in contact with the mounting surface 200, thereby reducing the risk of the sealing structure 312 causing the folded ring portion 311 to move in the second direction X, and ensuring the acoustic performance of the diaphragm 31.
[0092] In this embodiment, the surface of the sealing structure 312 facing the outer shell 1 is connected to the surface of the outer shell 1 facing the sealing structure 312. This arrangement improves the sealing effect between the sealing structure 312 and the outer shell 1. Together with the first protrusion 11 and the second groove 3127, a multi-layer sealing structure is formed, which further improves the waterproof and sealing effect, allowing the sound-generating device to be used in electronic devices with high waterproof performance requirements.
[0093] It should be noted that in this embodiment, both the first protrusion 11 and the second groove 3127 can be annular to cooperate with each other to form a complete sealing structure.
[0094] In some alternative embodiments, such as Figure 2As shown, the diaphragm 31 also includes a diaphragm 33, which is connected to the central region of the surround portion 311. The voice coil 32 is connected to the diaphragm 33 so that the surround portion 311 is driven to vibrate by driving the diaphragm 33 to vibrate, thereby producing sound.
[0095] The magnetic circuit system 2 can have various specific structures. This embodiment provides a magnetic circuit system 2, exemplarily, such as... Figure 2 As shown, the magnetic circuit system 2 includes a magnetic circuit assembly 22, a magnetic guiding assembly 23, and a centering support 24, all housed within the outer casing 1. The magnetic circuit assembly 22 has a magnetic gap 21. The magnetic guiding assembly 23 has a through hole 230 through which a voice coil 32 passes, with one end of the voice coil 32 facing away from the diaphragm 31 located within the magnetic gap 21. One end of the centering support 24 is electrically connected to the voice coil 32, while the other end of the centering support 24 is fixedly connected to the magnetic guiding assembly 23 via a gasket 25; that is, the connection between the centering support 24 and the gasket 25 is not electrical. The centering support 24 reduces the probability of polarization in the voice coil 32, thereby improving the vibration stability of the voice coil 32, and consequently improving the vibration stability of the diaphragm 31, ensuring the acoustic performance of the sound-generating device. In this embodiment, the centering support 24 is fixed to the magnetic conductive component 23 by the gasket 25, so that the gasket 25 can provide an elastic support point for the centering support 24, which is beneficial to the centering effect of the centering support 24.
[0096] In at least one implementation, such as Figure 12 As shown, the centering support 24 includes a fixed part 241 and an elastic arm 242 that are fixedly connected. The fixed part 241 is connected to the gasket 25, and the elastic arm 242 is suspended between the magnetic circuit assembly 22 and the magnetic guiding assembly 23. The elastic arm 242 is capable of elastic deformation relative to the fixed part 241, thereby reducing the polarization of the voice coil 32.
[0097] An electrical connection portion 243 is formed on the elastic arm 242. The electrical connection portion 243 is electrically connected to the voice coil 32 and the external circuit to realize the conduction between the external circuit and the voice coil 32.
[0098] The centering support 24 can be implemented in various ways. In one embodiment, the centering support 24 can be supported by a flexible circuit board, with the non-conductive portion of the flexible circuit board connected to the pad 25, and the conductive portion of the flexible circuit board electrically connected to the voice coil 32 and external circuitry. In other embodiments, the centering support 24 uses plastic as its main body, with a conductive layer disposed within the plastic material. The plastic material is fixedly connected to the pad 25, and the conductive layer is electrically connected to the voice coil 32.
[0099] In one embodiment, please see [link to previous article]. Figure 2The magnetic circuit assembly 22 includes a plurality of magnets 221 and at least one magnetic yoke 222. The magnets 221 are disposed on the magnetic yoke 222, and the magnetic yoke 222 is disposed on the side of the magnets 221 facing away from the magnetic guiding assembly 23. The plurality of magnets 221 are arranged sequentially at intervals, and a magnetic gap 21 is formed between two adjacent magnets 221.
[0100] In one embodiment, the magnetically conductive assembly 23 includes a first magnetically conductive body 231 and a second magnetically conductive body 232. The second magnetically conductive body 232 is annular, and the first magnetically conductive body 231 is disposed in the central region of the second magnetically conductive body 232, with a through hole 230 formed between the first magnetically conductive body 231 and the second magnetically conductive body 232. A gasket 25 is fixedly connected to the second magnetically conductive body 232.
[0101] This embodiment also provides an electronic device. In one embodiment, the electronic device includes the diaphragm 31 described above; in another embodiment, the electronic device includes the sound-generating device described above. The electronic device provided in this embodiment has high acoustic performance and good sound generation effect.
[0102] For example, the electronic device may be a computer, a mobile phone, a smart wearable device, etc.
[0103] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention 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 the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.
Claims
1. A sound-generating device, characterized in that, include: shell; A magnetic circuit system is connected to the housing, and the magnetic circuit system is provided with a magnetic gap; A vibration system includes a diaphragm and a voice coil for driving the diaphragm to vibrate. The diaphragm includes a folded ring portion, a sealing structure connected to a housing, and a vibrating plate connected to the folded ring portion. The sealing structure surrounds the folded ring portion. The sealing structure includes a connecting pressing portion and a first connecting portion. The angle between the inner surface of the pressing portion and a dashed line parallel to a second direction is a first angle, and the angle between the outer surface of the pressing portion and a dashed line parallel to the second direction is a second angle. The first angle is smaller than the second angle. The first connecting portion is connected to the folded ring portion, and the second direction is perpendicular to the axial direction of the sealing structure.
2. The sound-generating device according to claim 1, characterized in that, The area of the inner side of the pressing part is larger than the area of the outer side of the pressing part.
3. The sound-generating device according to claim 1, characterized in that, The outer shell has a third groove on its surface facing the sealing structure. The first connecting part has a protrusion extending in a first direction at one end away from the pressing part. The protrusion is located close to the outer ring surface of the sealing structure. The protrusion and the third groove cooperate with each other, and the protrusion is located in the third groove. The first direction is the axial direction of the sealing structure.
4. The sound-generating device according to claim 1, characterized in that, The magnetic circuit system includes a magnetic circuit assembly, a magnetic conductive assembly, and a centering support. The magnetic circuit assembly has the magnetic gap. One end of the voice coil away from the diaphragm is located in the magnetic gap. The centering support is located between the magnetic conductive assembly and the magnetic circuit assembly. One end of the centering support is electrically connected to the voice coil, and the other end is connected to the magnetic conductive assembly through a gasket.
5. The sound-generating device according to claim 4, characterized in that, The centering support includes a fixed part and an elastic arm. An electrical connection part is formed on the elastic arm. The electrical connection part is electrically connected to the voice coil. The fixed part is connected to the gasket.
6. The sound-generating device according to any one of claims 1-4, characterized in that, The outer casing has a first protrusion on its surface facing the sealing structure, and the sealing structure has a second groove that mates with the first protrusion. The first protrusion is located in the second groove, and the surface of the sealing structure facing the outer casing is connected to the surface of the outer casing facing the sealing structure.
7. The sound-generating device according to any one of claims 1-4, characterized in that, The inner side of the housing is provided with a second protrusion, and the diaphragm also includes a second connecting part, which is connected between the first connecting part and the folded ring part. The second connecting part is provided with a first groove that cooperates with the second protrusion; the second protrusion is located in the first groove.
8. The sound-generating device according to claim 7, characterized in that, The diaphragm further includes a folded edge portion, which is located outside the folded ring portion and spaced apart from the folded ring portion in the second direction; the folded edge portion is in contact with both the second protrusion and the inner surface of the outer shell.
9. The sound-generating device according to any one of claims 1-4, characterized in that, The end face of the pressing part that is away from the first connecting part is an arc surface.
10. An electronic device, characterized in that, Includes the sound-generating device as described in any one of claims 1-9.