Sound production device, sound production module and electronic equipment

Abstract

This invention discloses a sound-generating device, a sound-generating module, and an electronic device, relating to the field of electroacoustic transduction technology. The sound-generating device has two voice coils arranged parallel to each other along a second direction and connected to a first diaphragm assembly. A magnetic circuit system is located between the first and second diaphragm assemblies. The adjacent long axes of the two voice coils correspond to the second magnetic gaps of the magnetic circuit system. The magnetic circuit system also has two through holes penetrating the central magnetic part and the magnetic yoke. Each connector passes through one of the through holes and is connected to the first and second diaphragm assemblies. Each diaphragm is connected to a central magnetic part and a connector to close one through hole. A first rear cavity is formed between the first diaphragm assembly, the magnetic circuit system, and the two diaphragms. A first front cavity is formed between the second diaphragm assembly, the magnetic circuit system, and the two diaphragms. The sound-generating device also has a sound outlet communicating with the first front cavity. This invention achieves a significant increase in the effective sound-generating area of ​​the loudspeaker without increasing the product size.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic transduction technology, and in particular to a sound-generating device, as well as a sound-generating module and electronic device using the sound-generating device. Background Technology

[0002] In recent years, with the rapid development of consumer electronics, miniature speakers, as a common electroacoustic transducer, have been widely used in mobile phones, glasses, headphones, tablets and other fields. These portable terminal products have gradually formed a trend of multi-functionality, miniaturization and high performance.

[0003] Currently, some terminals, especially portable terminals such as mobile phones, tablets, and headphones, offer very limited installation space for speakers. The effective sound-producing area of ​​conventional speakers is limited by the product's external dimensions, and because the diaphragm surround vibrates non-piston, the effective air area propelled by the vibration system cannot exceed the product's external area, thus limiting the effective sound-producing area of ​​the vibration system and consequently restricting its sound performance. Summary of the Invention

[0004] The main objective of this invention is to provide a sound-generating device, a sound-generating module, and an electronic device, which aims to solve the problem of limited effective sound-generating area in existing vibration systems, and to provide a way to significantly increase the effective sound-generating area of ​​the sound-generating device without increasing the product size, thereby improving sound performance.

[0005] To achieve the above objectives, the present invention provides a sound-generating device, the sound-generating device comprising:

[0006] A vibration system that vibrates along a first direction includes a first diaphragm assembly, a second diaphragm assembly, and two voice coils. The first diaphragm assembly and the second diaphragm assembly are spaced apart along the first direction. The two voice coils are arranged in parallel along a second direction and are both connected to the first diaphragm assembly. Each voice coil has two long axis sides extending along a third direction. The two long axis sides are fitted together. The first direction, the second direction, and the third direction are perpendicular to each other. A magnetic circuit system is disposed between the first diaphragm assembly and the second diaphragm assembly. The magnetic circuit system includes a magnetic yoke, a side magnetic portion and two central magnetic portions disposed on the side of the magnetic yoke facing the first diaphragm assembly. The side magnetic portion is disposed outside the two central magnetic portions and spaced apart from them. A first magnetic gap is formed between the side magnetic portion and the central magnetic portion. The two central magnetic portions are spaced apart along a second direction and form a second magnetic gap between them. The second magnetic gap is connected to the first magnetic gap. The adjacent long axis sides of the two voice coils are respectively disposed corresponding to the second magnetic gap, and the other long axis side is respectively disposed corresponding to the first magnetic gap. The magnetic circuit system also has two through holes, each of which passes through one of the central magnetic portions and the magnetic yoke. Two connectors, each connector passing through one of the through holes, and both ends of each connector being connected to the first diaphragm assembly and the second diaphragm assembly, respectively; and Two diaphragms, each diaphragm including an outer connecting portion, an inner connecting portion and a folded ring portion located between the outer connecting portion and the inner connecting portion, each outer connecting portion being connected to a central magnetic portion, and each inner connecting portion being connected to a connector to close a through hole; The first diaphragm assembly forms a first rear cavity with the magnetic circuit system and the two diaphragms, the second diaphragm assembly forms a first front cavity with the magnetic circuit system and the two diaphragms, and the sound-generating device is also provided with a sound outlet communicating with the first front cavity.

[0007] In one embodiment, the two voice coils are integrally wound from the same conductor; Alternatively, the adjacent long axis edges of the two voice coils may be bonded together.

[0008] In one embodiment, the edge magnetic portion includes a stacked edge magnet and an edge magnetic plate, the edge magnet being connected to the magnetic yoke; each of the central magnetic portions includes a stacked central magnet and a central magnetic plate, the central magnet being connected to the magnetic yoke. The side magnet and the two center magnets are all magnetized along the first direction. The magnetization directions of the two center magnets are opposite, and the magnetization directions of adjacent side magnets and center magnets are opposite. The current directions in adjacent long axis sides of the two voice coils are the same.

[0009] In one embodiment, each of the central magnetic plates has a first stepped portion around the through hole on the side facing away from the central magnet, and the outer connecting portion of each diaphragm is connected to the first stepped portion; Alternatively, the magnetic yoke may have a second stepped portion surrounding each of the through holes on the side opposite to the central magnetic part, and the outer connecting portion of each diaphragm may be connected to the second stepped portion.

[0010] In one embodiment, the sound-generating device further includes a housing, the housing having a mounting cavity, the magnetic circuit system being disposed within the mounting cavity, the periphery of the first diaphragm assembly being connected to one end of the housing, and the periphery of the second diaphragm assembly being connected to the other end of the housing; The first diaphragm assembly, the housing, the magnetic circuit system, and the two diaphragms enclose the first rear cavity, and the second diaphragm assembly, the housing, the magnetic circuit system, and the two diaphragms enclose the first front cavity. The housing is provided with the sound outlet.

[0011] In one embodiment, the outer casing includes a first housing and a second housing arranged sequentially along the first direction, the magnetic circuit system is connected to the first housing and the second housing, the end of the first housing away from the second housing is connected to the periphery of the first diaphragm assembly, the end of the second housing away from the first housing is connected to the periphery of the second diaphragm assembly, and the second housing is provided with the sound outlet.

[0012] In one embodiment, the outer casing is further provided with a vent that communicates with the first rear cavity; wherein the vent is located in the first casing; or, the vent is formed between the first casing and the second casing; and / or, the sound outlet and the vent are located on different sides of the outer casing; And / or, the second housing is provided with a support platform adjacent to the first housing, and the periphery of the magnetic yoke is supported and fixed to the support platform; or, the second housing is an injection molded part, and the second housing and the magnetic yoke are integrally injection molded. And / or, the first housing is a metal part, and the first housing and the side magnetic plate are integrally formed.

[0013] In one embodiment, each of the connectors is bonded to the first diaphragm assembly and the second diaphragm assembly at both ends.

[0014] In one embodiment, the connector is a tube with one open end and one closed end, the connector having an open end and a closed end, the outer diameter of the open end being larger than the outer diameter of the closed end, the second diaphragm assembly being connected to the open end, the first diaphragm assembly being connected to the closed end, the connector being bent and extended at the open end to form a bent portion, the bent portion being connected to the second diaphragm assembly; wherein, the bent portion is formed by bending the open end; and / or, the magnetic circuit system has a clearance area corresponding to the bent portion; And / or, the connector is provided with a first through hole communicating with the first rear cavity.

[0015] In one embodiment, one of the inner connecting portions is sandwiched between one of the connecting members and the first diaphragm assembly or the second diaphragm assembly; Alternatively, the inner connecting part is provided with an inner ring hole so that the diaphragm is an annular diaphragm, and a connector passes through one of the inner ring holes. The inner connecting part is connected to the outside of the connector to close the through hole. Alternatively, each of the connectors includes two skeletons arranged along the first direction, the two skeletons being respectively disposed on opposite sides of the diaphragm along the first direction, one end of each of the two skeletons extending into a through hole and connected to the inner connecting portion, and the other ends of the two connectors being respectively connected to the first diaphragm assembly and the second diaphragm assembly.

[0016] The present invention also proposes a sound-generating module, the sound-generating module comprising: A module housing, the module housing having a receiving cavity and a module acoustic port communicating with the receiving cavity; and The aforementioned sound-generating device is disposed within the accommodating cavity, a second front cavity is formed between the module housing and the first diaphragm assembly of the sound-generating device, and a second rear cavity is formed between the module housing and the second diaphragm assembly of the sound-generating device. The module's sound hole is connected to the second front cavity, and is connected to the first front cavity of the sound-generating device through the sound outlet of the sound-generating device.

[0017] In one embodiment, the module housing is further provided with a module vent hole communicating with the first rear cavity and the second rear cavity of the sound-generating device.

[0018] The present invention also proposes an electronic device, which includes the sound-generating device described above; Alternatively, the electronic device may include the sound-generating module described above.

[0019] The sound-generating device of this invention comprises a first diaphragm assembly and a second diaphragm assembly of a vibration system respectively disposed on opposite sides of a magnetic circuit system along a first direction, and spaced apart from the magnetic circuit system. The magnetic circuit system is configured as a magnetic yoke, with a side magnetic portion and two central magnetic portions disposed on the yoke. The side magnetic portion is disposed outside the two central magnetic portions and forms a first magnetic gap with the two central magnetic portions. The two central magnetic portions are spaced apart along a second direction and form a second magnetic gap between them. Two voice coils are arranged in parallel along the second direction and are both connected to the first diaphragm assembly, such that the two long axis sides of the two voice coils are in contact, and adjacent long axis sides are corresponding to the second magnetic gap. The long axis side is positioned corresponding to the first magnetic gap. This dual voice coil structure drives the first diaphragm assembly to vibrate along the first direction to generate sound, thus achieving the sound generation function. This design increases the magnet volume through the multi-magnetic-part design of the magnetic circuit system, and, combined with the dual voice coil structure, effectively improves the acoustic performance of the sound-generating device. Furthermore, the dual voice coil structure effectively reduces the height in the Z-direction of the vibration system, further reducing the height of the sound-generating device in the Z-direction. The two voice coils are adjacent and close together, allowing their adjacent long axis sides to share the second magnetic gap located between the two central magnetic parts, further reducing the volume of the sound-generating device. Simultaneously, by setting the magnetic circuit system to respectively connect the two central magnetic parts and... The magnetic yoke has two through holes, and two connectors are respectively inserted into the two through holes, so that the two ends of the two connectors are connected to the first diaphragm assembly and the second diaphragm assembly respectively. Two diaphragms are connected to the two central magnets and the two connectors respectively to close the two through holes. This forms a first rear cavity between the first diaphragm assembly, the magnetic circuit system, and the two diaphragms, and a first front cavity between the second diaphragm assembly, the magnetic circuit system, and the two diaphragms. The sound-generating device has a sound outlet communicating with the first front cavity. This achieves a structure that uses two sets of vibration structures but only one magnetic circuit system to achieve coordinated sound generation of the double-sided diaphragm assemblies. This not only occupies a small volume but can also adapt to relatively narrow spaces. The installation space facilitates its widespread application in portable terminals, and the dual-vibration structure effectively increases the sound-generating area, thereby improving sound performance. Furthermore, when the sound-generating device is working, the magnetic circuit system directly drives the voice coil to vibrate the first diaphragm assembly, and through the two connectors in the two through holes, it simultaneously drives the second diaphragm assembly to achieve synchronous sound generation. The two through holes are sealed by two diaphragms, which isolate the first rear cavity and the first front cavity from each other, avoiding cross-influence of airflow. This allows the sound waves radiated by the second diaphragm assembly to the first front cavity and the sound waves radiated by the first diaphragm assembly to the side away from the first rear cavity to radiate outwards simultaneously, thereby achieving sound wave superposition and further improving the sound generation effect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of an embodiment of the sound-generating device provided by the present invention; Figure 2 A cross-sectional schematic diagram along a second direction of an embodiment of the sound-generating device provided by the present invention; Figure 3 A cross-sectional schematic diagram along a third direction of an embodiment of the sound-generating device provided by the present invention; Figure 4 A cross-sectional schematic diagram along a second direction for another embodiment of the sound-generating device provided by the present invention; Figure 5 This is a partially exploded schematic diagram of an embodiment of the sound-generating device provided by the present invention. Figure 6 A schematic diagram of the connection between the outer shell and the magnetic circuit system in one embodiment of the sound-generating device provided by the present invention; Figure 7 for Figure 6 A cross-sectional schematic diagram; Figure 8 for Figure 6 A schematic diagram of the decomposition process; Figure 9 A schematic diagram of the structure of the first diaphragm assembly, the diaphragm, and the second diaphragm assembly in one embodiment of the sound-generating device provided by the present invention; Figure 10 This is a schematic diagram of the structure of the first embodiment of the connector provided by the present invention; Figure 11 for Figure 10 A cross-sectional schematic diagram; Figure 12 This is a cross-sectional schematic diagram of a second embodiment of the connector provided by the present invention; Figure 13 This is a cross-sectional schematic diagram of the third embodiment of the connector provided by the present invention; Figure 14 This is a cross-sectional schematic diagram of the fourth embodiment of the connector provided by the present invention; Figure 15 This is a structural schematic diagram of the fifth embodiment of the connector provided by the present invention; Figure 16 This is a schematic diagram of the sixth embodiment of the connector provided by the present invention; Figure 17A schematic diagram of the seventh embodiment of the connector provided by the present invention; Figure 18 This is a cross-sectional schematic diagram of an embodiment of the diaphragm provided by the present invention; Figure 19 A cross-sectional schematic diagram of another embodiment of the diaphragm provided by the present invention; Figure 20 A cross-sectional schematic diagram of yet another embodiment of the diaphragm provided by the present invention; Figure 21 This is a cross-sectional schematic diagram along the second direction of an embodiment of the sound-generating module provided by the present invention.

[0022] Explanation of icon numbers: 100. Sound-generating device; 1. Housing; 11. First housing; 12. Second housing; 121. Support platform; 122. Sound outlet; 13. Vent; 2. Magnetic circuit system; 21. Magnetic yoke; 211. Clearance area; 22. Central magnetic part; 221. Central magnet; 222. Central magnetic guide plate; 223. First step part; 23. Side magnetic part; 231. Side magnet; 232. Side magnetic guide plate; 241. First magnetic gap; 242. Second magnetic gap; 25. Through hole; 3. Vibration system; 31. First diaphragm assembly; 311. First diaphragm; 312. First diaphragm... 32. Moving plate; 321. Second diaphragm assembly; 322. Second diaphragm; 323. Second vibrating plate; 33. Voice coil; 331. Long shaft edge; 34. Centering support plate; 4. Connector; 411. Open end; 412. Closed end; 413. Bending part; 414. Frame; 5. Diaphragm; 52. Folded ring part; 54. Inner connecting part; 541. Inner ring hole; 55. Outer connecting part; 6. First rear cavity; 7. First front cavity; 800. Module housing; 801. Second front cavity; 802. Second rear cavity; 803. Module sound hole; 804. Module vent hole; 900. Sound-generating module.

[0023] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0026] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0027] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0028] This invention proposes a sound-generating device 100, which is applied in an electronic device. It is understood that the electronic device can be a mobile phone, headphones, smart wearable devices, smart glasses, etc., and is not limited thereto.

[0029] Please refer to the reference. Figures 1 to 20As shown, in this embodiment of the invention, the sound-generating device 100 includes a vibration system 3, a magnetic circuit system 2, two connectors 4, and two diaphragms 5. The vibration system 3 vibrates along a first direction and includes a first diaphragm assembly 31, a second diaphragm assembly 32, and two voice coils 33. The first diaphragm assembly 31 and the second diaphragm assembly 32 are spaced apart along the first direction, and the two voice coils 33 are arranged in parallel along a second direction and are both connected to the first diaphragm assembly 31. Each voice coil 33 has two long axis sides 331 extending along a third direction. The shaft edge 331 is fitted together, and the first direction, the second direction, and the third direction are perpendicular to each other. The magnetic circuit system 2 is located between the first diaphragm assembly 31 and the second diaphragm assembly 32. The magnetic circuit system 2 includes a magnetic yoke 21, a side magnetic part 23 and two central magnetic parts 22 located on the side of the magnetic yoke 21 facing the first diaphragm assembly 31. The side magnetic part 23 is located outside the two central magnetic parts 22 and spaced apart from the two central magnetic parts 22. A first magnetic gap 241 is formed between the side magnetic part 23 and the central magnetic parts 22. The two central magnetic parts 22 are spaced apart along the second direction. A second magnetic gap 242 is formed between the two voice coils 33 and the first magnetic gap 241. The adjacent long axis sides 331 of the two voice coils 33 are respectively arranged with respect to the second magnetic gap 242, and the other long axis side 331 is respectively arranged with respect to the first magnetic gap 241. The magnetic circuit system 2 is also provided with two through holes 25. Each through hole 25 passes through a central magnetic part 22 and a magnetic yoke 21. Each connector 4 passes through a through hole 25, and the two ends of each connector 4 are respectively connected to the first diaphragm assembly 31 and the second diaphragm assembly 32. The diaphragm 5 includes an outer connecting portion 55, an inner connecting portion 54, and a folded ring portion 52 located between the outer connecting portion 55 and the inner connecting portion 54. Each outer connecting portion 55 is connected to a central magnet portion 22, and each inner connecting portion 54 is connected to a connector 4 to close a through hole 25. The first diaphragm assembly 31 forms a first rear cavity 6 between itself, the magnetic circuit system 2, and the two diaphragms 5. The second diaphragm assembly 32 forms a first front cavity 7 between itself, the magnetic circuit system 2, and the two diaphragms 5. The sound-generating device 100 is also provided with a sound outlet 122 communicating with the first front cavity 7.

[0030] In this embodiment, the sound-generating device 100 can be a single unit of a loudspeaker, and the loudspeaker can be a miniature loudspeaker. It is understood that, to facilitate the installation of the magnetic circuit system 2 and vibration system 3 of the sound-generating device 100, the sound-generating device 100 also includes a housing 1, in which both the magnetic circuit system 2 and vibration system 3 are housed. Thus, the housing 1 is used to install, fix, and support the magnetic circuit system 2 and vibration system 3. This not only enables the installation and fixation of the magnetic circuit system 2 and vibration system 3 but also provides protection for them.

[0031] Understandably, the outer casing 1 has a mounting cavity, and both the magnetic circuit system 2 and the vibration system 3 are housed within the receiving cavity of the outer casing 1. In this embodiment, as... Figures 2 to 8As shown, the magnetic circuit system 2 is located inside the mounting cavity, the periphery of the first diaphragm assembly 31 is connected to one end of the housing 1, and the periphery of the second diaphragm assembly 32 is connected to the other end of the housing 1.

[0032] In this embodiment, a first rear cavity 6 is formed between the first diaphragm assembly 31 and the magnetic circuit system 2, that is, the first diaphragm assembly 31, the outer shell 1, the magnetic circuit system 2 and the two diaphragms 5 enclose and form the first rear cavity 6. A first front cavity 7 is formed between the second diaphragm assembly 32 and the magnetic circuit system 2, that is, the second diaphragm assembly 32, the outer shell 1, the magnetic circuit system 2 and the two diaphragms 5 enclose and form the first front cavity 7.

[0033] Understandably, the sound-generating device 100 also has a sound outlet 122 communicating with the first front cavity 7. This allows the sound waves radiated by the second diaphragm assembly 32 towards the first front cavity 7 to radiate outwards through the sound outlet 122, and the sound waves radiated by the first diaphragm assembly 31 away from the first rear cavity 6 to also radiate outwards. At this time, the sound waves radiated outwards by the first diaphragm assembly 31 and the sound waves radiated outwards by the second diaphragm assembly 32 through the sound outlet 122 can be superimposed, thereby increasing the effective sound-generating area and improving the acoustic performance of the sound-generating device 100. In this embodiment, as... Figure 1 , Figure 2 , Figures 4 to 8 As shown, the outer casing 1 is provided with a sound outlet 122.

[0034] In this embodiment, for the sake of simplicity, the position of the first diaphragm assembly 31 of the sound-generating device 100 when it is placed facing upwards is used as a reference to define the upper and lower positions, that is, the side of the first diaphragm assembly 31 facing away from the magnetic circuit system 2 is upper, and the side of the second diaphragm assembly 32 facing away from the magnetic circuit system 2 is lower.

[0035] It should be noted that the outer contour of the sound-generating device 100 can be a circular, elliptical, or square polygonal structure, and is not limited here. In this embodiment, the sound-generating device 100 may optionally be square. The vibration direction of the first diaphragm assembly 31 and the second diaphragm assembly 32 of the vibration system 3 is defined as the first direction, and the first direction is defined as the Z-axis direction (that is, the thickness direction of the sound-generating device 100). The width direction of the sound-generating device 100 is defined as the second direction, and the second direction is defined as the X-axis direction. The length direction of the sound-generating device 100 is defined as the third direction, and the third direction is defined as the Y-axis direction. The first direction, the second direction, and the third direction are arranged perpendicularly to each other, such as... Figures 1 to 8 As shown, no limitations are specified here. It is understood that the planes containing the second and third directions are perpendicular to the first direction. It is also understood that the vertical directions coincide with or are parallel to the first direction.

[0036] To facilitate the assembly of the magnetic circuit system 2 and the vibration system 3, the outer casing 1 may optionally be a split structure. In this embodiment, as... Figures 1 to 8As shown, the outer casing 1 includes a first casing 11 and a second casing 12 arranged sequentially along a first direction, and the first casing 11 and the second casing 12 enclose each other to form an installation cavity.

[0037] Optionally, the magnetic circuit system 2 is connected to the first housing 11 and the second housing 12. The end of the first housing 11 away from the second housing 12 is connected to the periphery of the first diaphragm assembly 31, and the end of the second housing 12 away from the first housing 11 is connected to the periphery of the second diaphragm assembly 32. In this embodiment, the second housing 12 is provided with a sound outlet 122.

[0038] In this embodiment, the outer shell 1 can be a square frame structure, that is, both the first shell 11 and the second shell 12 are square frame structures. The first shell 11 is used to support and fix the first diaphragm assembly 31 so as to support the first diaphragm assembly 31 away from the magnetic circuit system 2. The second shell 12 is used to support and fix the second diaphragm assembly 32 so as to support the second diaphragm assembly 32 away from the magnetic circuit system 2. In this way, the first diaphragm assembly 31 and the second diaphragm assembly 32 are opposite to and spaced apart from the magnetic circuit system 2, thereby facilitating the vibration and sound generation of the first diaphragm assembly 31 and the second diaphragm assembly 32.

[0039] It should be noted that the first housing 11 and the second housing 12 of the outer casing 1 can be connected by adhesive bonding or welding, and there is no limitation on this. Optionally, the first housing 11 and the second housing 12 are bonded together.

[0040] To further improve the connection strength, in one embodiment, the sound-generating device 100 also includes a fixing member extending along a first direction, with one end of the fixing member connected to the first housing 11 and the other end connected to the second housing 12. In this embodiment, the first housing 11 and the second housing 12 are connected by the fixing member. The fixing member is welded or bonded to the first housing 11 and the second housing 12. This arrangement improves the connection strength and enhances the drop resistance of the sound-generating device 100.

[0041] Optionally, the sound outlet 122 includes multiple outlets, which facilitates the smooth and rapid flow of sound waves, thereby improving the sound production effect.

[0042] It should be noted that, in order to ensure the vibration performance of the vibration system 3 and to maintain air pressure balance on the opposite sides of the first diaphragm assembly 31 and the opposite sides of the second diaphragm assembly 32, in this embodiment, the sound-generating device 100 is provided with a vent 13 communicating with the first rear cavity 6. It is understood that the outer casing 1 is provided with a vent 13 communicating with the first rear cavity 6 to achieve air release, and this is not limited to this.

[0043] In this embodiment, as Figure 2 , Figures 5 to 8As shown, the vent 13 is located on the first housing 11. Of course, in other embodiments, the vent 13 is formed between the first housing 11 and the second housing 12, which is not limited here. Optionally, multiple vents 13 are included, which facilitates smooth and rapid airflow, thereby improving the sound production effect. Optionally, the sound outlet 122 and the vent 13 are located on different sides of the housing 1 to avoid the sound waves radiated from the sound outlet 122 and the sound waves radiated from the vent 13 canceling each other out and affecting the sound production effect of the sound-producing device 100. Specifically, along the circumference of the housing 1, a sound outlet 122 is provided on one side of the housing 1, and multiple vents 13 are provided on the remaining sides of the housing 1.

[0044] Understandably, the first diaphragm assembly 31 and the second diaphragm assembly 32 can refer to existing forms. Both voice coils 33 are connected to the first diaphragm assembly 31 and extend into the first magnetic gap 241 and the second magnetic gap 242 of the magnetic circuit system 2. The first magnetic gap 241 and the second magnetic gap 242 are connected to form the magnetic gap of the magnetic circuit system 2. The changing current flowing through the two voice coils 33 is subjected to different magnitudes of Ampere force, causing them to vibrate. This vibration of the two voice coils 33 drives the first diaphragm assembly 31 to vibrate. The energy conversion method is electrical energy—mechanical energy—sound energy. The form of the magnetic circuit system 2 can also refer to existing structures; the top-view outline of the magnetic circuit system 2 can be circular or rounded rectangle, etc.

[0045] In this embodiment, as Figures 1 to 9As shown, the vibration system 3 is configured as a first diaphragm assembly 31 and a second diaphragm assembly 32 arranged opposite to and spaced apart along a first direction. The magnetic circuit system 2 is positioned between the first diaphragm assembly 31 and the second diaphragm assembly 32, and is arranged opposite to and spaced apart from both the first diaphragm assembly 31 and the second diaphragm assembly 32. Two voice coils 33 are arranged parallel along a second direction and are both connected to the first diaphragm assembly 31, such that the two long axis edges 331 of the two voice coils 33 are in contact. The magnetic circuit system 2 is configured as a magnetic yoke 21, with a side magnetic portion 23 and two central magnetic portions 22 located on the magnetic yoke 21. The side magnetic portion 23 is located outside the two central magnetic portions 22 and forms a first magnetic gap 241 with the two central magnetic portions 22 spaced apart. The two central magnetic portions 22 are arranged spaced apart along the second direction, forming a second magnetic gap between them. The gap 242 is such that the adjacent long axis sides 331 of the two voice coils 33 are both set to correspond to the second magnetic gap 242, and the other long axis side 331 is set to correspond to the first magnetic gap 241. In this way, the first diaphragm assembly 31 is driven to vibrate and generate sound by the dual voice coil structure, so as to realize the sound generation function. The multi-magnetic part design of the magnetic circuit system 2 can increase the magnet volume and, together with the dual voice coil structure, effectively improve the acoustic performance of the sound generation device 100. At the same time, the vibration system 3 can effectively reduce the height in the Z direction by utilizing the dual voice coil structure, thereby further reducing the height of the sound generation device 100 in the Z direction. Moreover, the two voice coils 33 are adjacent and close together, so that the adjacent long axis sides 331 of the two voice coils 33 share the second magnetic gap 242 located between the two central magnetic parts 22, thereby further reducing the volume of the sound generation device 100.Meanwhile, by setting two through holes 25 on the magnetic circuit system 2, respectively penetrating the two central magnetic parts 22 and the magnetic yoke 21, and by inserting two connectors 4 into the two through holes 25, the two ends of the two connectors 4 are respectively connected to the first diaphragm assembly 31 and the second diaphragm assembly 32. Two diaphragms 5 are connected to the two central magnetic parts 22 and the two connectors 4, respectively. This forms a first rear cavity 6 between the first diaphragm assembly 31, the magnetic circuit system 2, and the two diaphragms 5, and a first front cavity 7 between the second diaphragm assembly 32, the magnetic circuit system 2, and the two diaphragms 5. A sound outlet 122 communicating with the first front cavity 7 is provided in the sound-generating device 100. Thus, the magnetic field generated by the magnetic circuit system 2 acts on the two voice coils. The two voice coils 33 drive the first diaphragm assembly 31 to vibrate in the first direction. Since the two ends of the two connectors 4 are respectively connected to the first diaphragm assembly 31 and the second diaphragm assembly 32, the first diaphragm assembly 31 drives the second diaphragm assembly 32 to achieve synchronous sound production through the two connectors 4. This achieves a structure that uses two sets of vibration structures (i.e., the first diaphragm assembly 31 and the second diaphragm assembly 32) but only one magnetic circuit system 2 to achieve coordinated sound production of the double-sided diaphragm assemblies. This not only occupies a small volume, adapting to relatively small installation spaces and facilitating widespread application in portable terminals, but also effectively increases the sound-producing area using the dual vibration structure, thereby improving the sound performance of the sound-producing device 100.

[0046] Understandably, when the sound-generating device 100 of the present invention is working, the magnetic circuit system 2 first directly drives the two voice coils 33 to vibrate the first diaphragm assembly 31. Since the two diaphragms 5 respectively close the two through holes 25, the first rear cavity 6 of the first diaphragm assembly 31 and the first front cavity 7 of the second diaphragm assembly 32 are isolated from each other and the sound waves and airflow do not affect each other. Furthermore, the sound waves radiated by the second diaphragm assembly 32 toward the first front cavity 7 and the sound waves radiated by the first diaphragm assembly 31 toward the side away from the first rear cavity 6 (the sound waves radiated by the upward vibration of the first diaphragm assembly 31) are radiated outward at the same time, thereby achieving sound wave superposition to further improve the sound generation effect of the sound-generating device 100.

[0047] In this embodiment, to ensure the vibration performance of the first diaphragm assembly 31 and the second diaphragm assembly 32 of the vibration system 3, the heights of the first rear cavity 6 and the first front cavity 7 along the first direction are greater than or equal to the amplitudes of the vibrations of the first diaphragm assembly 31 and the second diaphragm assembly 32 along the first direction. It is understood that the phase of the sound wave radiated by the first diaphragm assembly 31 into the first rear cavity 6 is opposite to the phase of the sound wave radiated by the second diaphragm assembly 32 into the first front cavity 7. That is, the phase of the sound wave radiated upwards by the first diaphragm assembly 31 is the same as the phase of the sound wave radiated by the second diaphragm assembly 32 into the first front cavity 7, and the phase of the sound wave radiated by the first diaphragm assembly 31 into the first rear cavity 6 is the same as the phase of the sound wave radiated downwards by the second diaphragm assembly 32. When the sound-generating device 100 is applied to an electronic device, the sound waves radiated upwards by the first diaphragm assembly 31 and the sound waves radiated into the first front cavity 7 by the second diaphragm assembly 32 can be radiated outwards through structures such as the sound outlet channel, thereby achieving sound wave superposition and improving sound generation performance.

[0048] Optionally, the two voice coils 33 are integrally wound from the same conductor. In this embodiment, the adjacent long axis edges 331 of the two voice coils 33 are bonded together.

[0049] Understandably, this is to ensure that the phases of the radiated sound waves from the first diaphragm assembly 31 and the second diaphragm assembly 32 are the same or substantially the same. Optionally, the first diaphragm assembly 31 and the second diaphragm assembly 32 are arranged symmetrically with respect to the magnetic circuit system 2, which is not limited here.

[0050] It should be noted that the form of the through hole 25 can be on the magnetic circuit system 2, as long as it allows the connector 4 to move easily in the through hole 25 to realize the linkage between the first diaphragm assembly 31 and the second diaphragm assembly 32, and the inner wall surface of each connector 4 and the corresponding through hole 25 can provide clearance for the vibration of the diaphragm 5. There are no restrictions here.

[0051] In this embodiment, the two through holes 25 are located inside the two voice coils 33, that is, each voice coil 33 is arranged around a through hole 25. Optionally, each through hole 25 is located at the center of a central magnet 22. In this way, the performance of the magnetic circuit system 2 is not affected, and the arrangement is simpler and easier to implement. Of course, in other embodiments, the through hole 25 can also be located outside the voice coil 33, for example, the through hole 25 is located in the side magnet 23, etc., which is not limited here. As long as the connector 4 can move freely in the through hole 25 to realize the linkage between the first diaphragm assembly 31 and the second diaphragm assembly 32, and the inner wall surface of the connector 4 and the through hole 25 can provide clearance for the vibration of the diaphragm 5, it is not limited here.

[0052] Understandable, such as Figures 2 to 8As shown, a magnetic gap is formed between the two central magnetic sections 22 and the side magnetic sections 23 of the magnetic circuit system 2 to accommodate two voice coils 33. Optionally, at least one of the central magnetic sections 22 and the side magnetic sections 23 is provided with a permanent magnet. In this embodiment, each voice coil 33 is arranged around a central magnetic section 22.

[0053] Optionally, each through-hole 25 extends through a central magnetic part 22 and a magnetic yoke 21, meaning the magnetic yoke 21 and each central magnetic part 22 cooperate to form a through-hole 25. It is understood that each central magnetic part 22 may include a central magnet 221 or a sidewall of the magnetic yoke 21, and the side magnetic part 23 may be a side magnet 231 or a sidewall of the magnetic yoke 21. At least one of the central magnetic part 22 and the side magnetic part 23 is provided with a permanent magnet, which can ensure the magnetic stability of the magnetic circuit system 2, thereby providing a more stable magnetic field, thus making the vibration of the first diaphragm assembly 31 more stable, and ensuring the stability of the sound generation device 100.

[0054] Since the amplitude of the central part of the first diaphragm assembly 31 corresponding to the two central magnets 22 is usually the largest, by using the two connectors 4 in the two through holes 25 to fix the central part of the first diaphragm assembly 31 to the central part of the second diaphragm assembly 32, it is possible to make it easier for the first diaphragm assembly 31 to push the second diaphragm assembly 32.

[0055] In one embodiment, the connector 4 is a tube with one end open and the other end closed. The connector 4 has an open end 411 and a closed end 412. The outer diameter of the open end 411 is larger than the outer diameter of the closed end 412. The second diaphragm assembly 32 is connected to the open end 411, and the first diaphragm assembly 31 is connected to the closed end 412.

[0056] In this embodiment, as Figures 2 to 5 , Figures 10 to 17 As shown, each connector 4 has a first end and a second end along a first direction. At this time, one of the first end and the second end is an open end 411, and the other is a closed end 412. That is, one end of the connector 4 is open and the other end is closed, so that the interior of the connector 4 is a hollow structure.

[0057] Understandably, by making the outer diameter of the open end 411 of the connector 4 larger than the outer diameter of the closed end 412, and connecting the second diaphragm assembly 32 to the open end 411 and the first diaphragm assembly 31 to the closed end 412, the support force on the second diaphragm assembly 32 can be increased, thereby improving the vibration stability of the second diaphragm assembly 32 and the vibration system 3. Simultaneously, it ensures the structural strength of the connector 4 during transmission and reduces energy loss by reducing mass. It should be noted that the transmission of the connector 4 refers to pushing or pulling the second diaphragm assembly 32 with the first diaphragm assembly 31 as a reference.

[0058] Of course, in other embodiments, the second diaphragm assembly 32 may be connected to the closed end 412, and the first diaphragm assembly 31 may be connected to the open end 411; this is not limited here.

[0059] Optionally, the closed end 412 of the connector 4 has a connecting plane. This connecting plane connects to one of the first diaphragm assembly 31 and the second diaphragm assembly 32, thereby effectively increasing the connecting area and improving the connection stability.

[0060] To further increase the connection area of ​​the opening end 411 and improve connection stability, in one embodiment, the connector 4 bends and extends at the opening end 411 to form a bent portion 413. It is understood that both the bent portion 413 and the opening end 411 are connected to one of the first diaphragm assembly 31 and the second diaphragm assembly 32. In this embodiment, the bent portion 413 is connected to the second diaphragm assembly 32.

[0061] In this embodiment, as Figures 2 to 5 , Figures 10 to 17 As shown, by bending the open end 411 to form a bent portion 413, the bent portion 413 can be connected to one of the first diaphragm assembly 31 and the second diaphragm assembly 32, thereby effectively increasing the connection area and improving connection stability. Optionally, the bent portion 413 extends along the plane of the first diaphragm assembly 31 or the second diaphragm assembly 32. It is understood that the surface of the bent portion 413 facing the first diaphragm assembly 31 or the second diaphragm assembly 32 is flush with the end face where the open end 411 is located, but this is not limited here.

[0062] Optionally, the magnetic circuit system 2 is provided with a clearance area 211 corresponding to the bend 413. It can be understood that by providing a clearance area 211 on the magnetic circuit system 2, the clearance area 211 can provide clearance for the bend 413, thereby saving the vibration space occupied by the thickness of the bend 413. Without affecting the performance of the magnetic circuit system 2, the thickness of the sound generating device 100 is reduced, which is beneficial for thin design.

[0063] In one embodiment, the first or second end is an open end 411, and the connector 4 is bent at the open end 411 to form a bent portion 413. The magnetic circuit system 2 has a clearance area 211 corresponding to the bent portion 413. It can be understood that the open end 411 of the connector 4 is the open end. The connector 4 can be open at both ends, or open at one end and closed at the other end, and is not limited here. The technical effects of the bent portion 413 and the clearance area 211 have been demonstrated above and will not be repeated here.

[0064] In one embodiment, the first end is a closed end 412 and the second end is an open end 411. The outer diameter of the first end is smaller than that of the second end. This can improve the support force of the connector 4 on the second diaphragm assembly 32, improve the linkage effect between the second diaphragm assembly 32 and the first diaphragm assembly 31, and improve the vibration stability of the vibration system 3.

[0065] To fully utilize the internal space of the connector 4, the connector 4 is provided with a first through hole. This arrangement can reduce weight. It is understood that the first through hole can connect to the first rear cavity 6; or, the first through hole can connect to the first front cavity 7. Optionally, the connector 4 is provided with a first through hole connecting to the first rear cavity 6. This arrangement can not only make full use of the internal space of the connector 4, but also reduce weight and improve the mid-frequency performance and sensitivity of the sound-generating device 100, which is not limited here.

[0066] It should be noted that the first through hole can be a hollow structure provided on the side wall of the connector 4, that is, the side wall of the connector 4 is hollow. Of course, in other embodiments, the first through hole can be a through hole or a notch, etc., and is not limited here.

[0067] In one embodiment, the sidewall of the connector 4 is provided with a recessed or protruding reinforcing portion extending circumferentially along the connector 4. It is understood that this increases the area of ​​the upper and lower surfaces of the connector 4, facilitating the fixed connection between the connector 4 and the first diaphragm assembly 31, and between the connector 4 and the second diaphragm assembly 32. For example, when adhesive is used, the adhesive adheres to both the upper and lower surfaces of the connector 4; a larger adhesion area results in greater adhesive force.

[0068] In one embodiment, the connector 4 is a hollow cylindrical shape with openings at both ends. The connector 4 has a first end and a second end. One of the first diaphragm assembly 31 and the second diaphragm assembly 32 is connected to the first end, and the other of the first diaphragm assembly 31 and the second diaphragm assembly 32 is connected to the second end.

[0069] In this embodiment, the connector 4 is a hollow cylindrical shape with open top and bottom. The connector 4 has a first end and a second end, which are respectively connected to the first diaphragm assembly 31 and the second diaphragm assembly 32. It can be understood that by setting the connector 4 into a cylindrical structure, both the structural strength during transmission can be guaranteed, and energy loss can be reduced by reducing mass.

[0070] To further increase the connection area at the first end and improve connection stability, in one embodiment, the first end is folded to form a first flange. In this embodiment, the first flange is formed by bending and extending the first end along the plane of the first diaphragm assembly 31 or the second diaphragm assembly 32. It is understood that the surface of the first flange facing the first diaphragm assembly 31 or the second diaphragm assembly 32 is flush with the end face where the first end is located, but this is not limited here.

[0071] Similarly, to further increase the connection area of ​​the second end and improve connection stability, in one embodiment, the second end is folded to form a second flange. In this embodiment, the second flange is formed by bending and extending the second end along the plane of the first diaphragm assembly 31 or the second diaphragm assembly 32. It is understood that the surface of the second flange facing the first diaphragm assembly 31 or the second diaphragm assembly 32 is flush with the end face where the second end is located, which is not limited here.

[0072] It should be noted that the first flange is formed by bending and extending the first end outward or inward, and the second flange is formed by bending and extending the second end outward or inward; no specific limitation is made here.

[0073] In one embodiment, the sidewall of the connector 4 is provided with a recessed or protruding reinforcing portion. In this embodiment, by providing a reinforcing portion on the sidewall of the connector 4, the structural strength of the connector 4 can be strengthened, and the connection area between the first end and the second end of the connector 4 and the first diaphragm assembly 31 and the second diaphragm assembly 32 can be increased, thereby improving the connection stability.

[0074] In one embodiment, the connector 4 includes a first connecting portion, a second connecting portion, and a support portion connected between the first connecting portion and the second connecting portion. The first connecting portion and the second connecting portion are arranged opposite to each other along a first direction, and both the first connecting portion and the second connecting portion extend perpendicularly to the first direction and are elongated. One of the first diaphragm assembly 31 and the second diaphragm assembly 32 is connected to the first connecting portion, and the other of the first diaphragm assembly 31 and the second diaphragm assembly 32 is connected to the second connecting portion.

[0075] In this embodiment, by setting the connector 4 as a bracket composed of rods, the space occupied is relatively small and the weight is also small.

[0076] Optionally, the support portion extends along a first direction, and the support portion includes one or more. When there are multiple support portions, the multiple support portions are arranged at intervals. In this embodiment, the multiple support portions are arranged at intervals along the length direction of the first connecting portion or the second connecting portion.

[0077] Understandably, the first connecting part and the second connecting part extend laterally, and the support part extends vertically. Multiple support parts, together with the first connecting part and the second connecting part, form multiple roughly rectangular holes, which not only ensures transmission strength but also reduces mass. In addition, the connecting part 4 in this embodiment has a relatively regular shape and is easy to process and form.

[0078] In one embodiment, the support portion includes a first segment extending downward from one end of the first connecting portion, a second segment extending from the lower end of the first segment along the length direction of the first connecting portion toward the other end of the first connecting portion, and a third segment extending downward from the end of the second segment away from the first segment and connected to the second connecting portion. In this embodiment, the support portion extends in a linear bent shape, occupying minimal space.

[0079] In one embodiment, the support includes two parts, which are arranged at an angle and cross each other. It is understood that this arrangement allows the connector 4 to form a more stable structure with a smaller cross-section, thereby further reducing the space occupied.

[0080] It should be noted that, in order to reduce the weight of connector 4, connector 4 is made of a porous material. It can be understood that, by combining the porous material with a cylindrical or bracket-like structure, the mass of connector 4 can be further reduced.

[0081] In one embodiment, the first diaphragm assembly 31 includes a first diaphragm 311 and a first diaphragm plate 312 connected to the first diaphragm 311, and a voice coil 33 is connected to the first diaphragm plate 312. The second diaphragm assembly 32 includes a second diaphragm 321 and a second diaphragm plate 322 connected to the second diaphragm 321.

[0082] Understandably, the periphery of the first diaphragm 311 is connected to the outer shell 1, and the voice coil 33 is connected to the first diaphragm 312. In this embodiment, the first diaphragm 311 has a first folded ring. Optionally, the first diaphragm 311 includes a first folded ring, a first outer connecting portion disposed on the outside of the first folded ring, and a first inner connecting portion disposed on the inside of the first folded ring. The first outer connecting portion of the first diaphragm 311 can be connected to the outer shell 1, and the first inner connecting portion of the first diaphragm 311 is connected to the first diaphragm 312. It should be noted that the first folded ring of the first diaphragm 311 can be an upwardly convex bulge structure or a downwardly concave bulge structure.

[0083] Optionally, the first outer connecting portion, the first folded ring, and the first inner connecting portion of the first diaphragm 311 are integrally formed. In this embodiment, the first outer connecting portion of the first diaphragm 311 is connected to the first housing 11. To further increase the connection area between the first diaphragm 311 and the housing 1, and to improve the connection stability and sealing, the periphery of the first outer connecting portion of the first diaphragm 311 is bent and extended toward the outer wall of the first housing 11 to form a first extension, which is connected to the outer wall of the first housing 11.

[0084] Understandably, the periphery of the second diaphragm 321 is connected to the outer shell 1. In this embodiment, the second diaphragm 321 has a second folded ring. Optionally, the second diaphragm 321 includes a second folded ring, a second outer connecting portion disposed on the outside of the second folded ring, and a second inner connecting portion disposed on the inside of the second folded ring. The second outer connecting portion of the second diaphragm 321 can be connected to the outer shell 1, and the second inner connecting portion of the second diaphragm 321 is connected to the second vibrating plate 322. It should be noted that the second folded ring of the second diaphragm 321 can be an upwardly convex bulge structure or a downwardly concave bulge structure.

[0085] Optionally, the second outer connecting portion, the second folded ring, and the second inner connecting portion of the second diaphragm 321 are integrally formed. In this embodiment, the second outer connecting portion of the second diaphragm 321 is connected to the second housing 12. To further increase the connection area between the second diaphragm 321 and the housing 1, and improve the connection stability and sealing, the periphery of the second outer connecting portion of the second diaphragm 321 is bent and extended toward the outer wall of the second housing 12 to form a second extension, which is connected to the outer wall of the second housing 12.

[0086] In the above embodiments, such as Figures 2 to 5 , Figures 10 to 17 As shown, the two connectors 4 are separately configured from the first diaphragm assembly 31 and the second diaphragm assembly 32. Optionally, both ends of each connector 4 are bonded to the first diaphragm assembly 31 and the second diaphragm assembly 32, respectively.

[0087] Of course, in other embodiments, at least one of the two connecting members 4 may be integrally formed with the first diaphragm assembly 31 or the second diaphragm assembly 32, which is not limited here. Optionally, both connecting members 4 may be integrally formed with the first vibrating plate 312 or the second vibrating plate 322. Alternatively, one connecting member 4 may be integrally formed with the first vibrating plate 312, and the other connecting member 4 may be integrally formed with the second vibrating plate 322, which is not limited here.

[0088] In one embodiment, the first vibrating plate 312 is provided with a first protrusion extending toward at least one through hole 25, the first protrusion passing through the through hole 25 and connected to the second vibrating plate 322, the first protrusion forming a connector 4.

[0089] In this embodiment, a first protrusion extending into the through hole 25 is provided on the first vibrating plate 312, allowing the first protrusion to pass through the through hole 25 and connect to the second diaphragm assembly 32, thus forming a connector 4 using the first protrusion. At this time, the first protrusion of the first vibrating plate 312 can form a connector 4 connecting the second diaphragm assembly 32, eliminating the need for an additional connector 4, thereby reducing the cost of the sound generating device 100.

[0090] In another embodiment, the second vibrating plate 322 is provided with a second protrusion extending toward at least one through hole 25, the second protrusion passing through the through hole 25 and connected to the first vibrating plate 312, the second protrusion forming a connector 4.

[0091] In this embodiment, a second protrusion extending into the through hole 25 is provided on the second vibrating plate 322, allowing the second protrusion to pass through the through hole 25 and connect to the first diaphragm assembly 31, thus forming a connector 4. At this time, the second protrusion of the second vibrating plate 322 can form a connector 4 connecting the first diaphragm assembly 31, eliminating the need for an additional connector 4, thereby reducing the cost of the sound generating device 100.

[0092] Optionally, such as Figures 2 to 5 , Figure 9 As shown, the concave direction of the first fold ring is opposite to that of the second fold ring, and both are concave towards the direction close to the magnetic circuit system 2. Understandably, this arrangement effectively reduces the thickness and volume of the sound-generating device 100 along the first direction, achieving a thinner design.

[0093] In this embodiment, the connector 4 is formed by a first protrusion of the first vibrating plate 312 or a second protrusion of the second vibrating plate 322. The interior of the first or second protrusion can be a hollow structure. This structure can ensure the structural strength during transmission and reduce energy loss by reducing mass, thereby making the vibration transmitted by the connector 4 more significant and improving the high-frequency performance of the sound-generating device. The first and second protrusions have the same structure, which is convenient for processing and improves production efficiency, and is not limited here.

[0094] Understandably, in order to further increase the structural strength of the connector 4 and reduce its mass, in one embodiment, each connector 4 is tapered along the first direction. In this embodiment, as... Figure 10 , Figure 11 , Figure 13 , Figure 14 As shown, the area of ​​the cross section of the connector 4 along the second direction gradually decreases or gradually increases along the first direction. This arrangement not only increases the structural strength of the connector 4 itself, but also improves the connection strength to ensure the driving force of the second diaphragm assembly 32.

[0095] It should be noted that the tapered connector 4 can also indirectly widen the distance between itself and the inner wall of the through hole 25, thereby providing effective clearance space for the diaphragm 5 and preventing interference between the diaphragm 5 and the connector 4 or the inner wall of the through hole 25.

[0096] Of course, the connector 4 may be tapered along the first direction, or the connector 4 may be tapered from both ends toward the middle along the first direction, or the connector 4 may not be tapered; this is not limited here.

[0097] Optionally, the cross-sectional shape of the sidewall of each connector 4 along the first direction is stepped, arc-shaped, or straight. In this embodiment, such as... Figures 2 to 5 , Figure 12 As shown, the sidewall of the connector 4 has a stepped cross-sectional shape along the first direction, meaning the sidewall of the connector 4 is configured with multiple bends. This structure can further improve the strength of the connector 4 itself, and at the same time improve the connection strength of the connector 4, so as to obtain a better sound production effect. In one embodiment, the sidewall of the connector 4 has a stepped cross-sectional shape along the first direction, and the connector 4 has a clearance space to avoid the folded ring portion 52.

[0098] like Figure 13 As shown, the sidewall of the connector 4 has an arc-shaped cross-section along the first direction. In this embodiment, the arc-shaped sidewall can bulge towards the through hole 25 or be recessed away from the through hole 25. In both cases, the connector 4 has high structural strength, thereby achieving better connection strength.

[0099] In addition, such as Figure 14 As shown, the cross-sectional shape of the sidewall of the connector 4 along the first direction can also be a combination of stepped and arc shapes, which can further obtain higher structural strength and ensure the stability of the connection between the first diaphragm assembly 31 and the second diaphragm assembly 32.

[0100] Of course, such as Figure 10 and Figure 11 As shown, the cross-sectional shape of the sidewall of the connector 4 along the first direction is straight, and is not limited here. It should be noted that the cross-sectional shape of the sidewall of the connector 4 along the first direction can be at least one of stepped, arc, and straight shapes or a combination thereof, and is not limited here.

[0101] In one embodiment, the sidewall of each connector 4 has a rectangular or circular cross-sectional shape along the second direction, or a combination of a circle and a rectangle, and the second direction is perpendicular to the first direction.

[0102] In this embodiment, as Figures 15 to 17 As shown, the projected shape of the connector 4 along the first direction is a rectangle, a circle, or a combination of a circle and a rectangle. It is understood that the cross-sectional shape of the connector 4 along the second direction is a rectangle, a circle, or a combination of a circle and a rectangle, and this is not limited here.

[0103] Understandably, the cross-sectional shape of the through hole 25 also includes circular and rectangular embodiments, which can match the connector 4, thereby allowing the connector 4 to be better accommodated and facilitating a fixed connection. When the cross-section of the connector 4 is circular, the cross-section of the through hole 25 is circular; when the cross-section of the connector 4 is rectangular, the cross-section of the through hole 25 is also rectangular, and these rectangles are all rounded rectangles with no sharp parts, improving the smoothness of the sound output of the sound-generating device 100 and the user's comfort.

[0104] In one embodiment, each connector 4 includes two skeletons 414 arranged along a first direction. The two skeletons 414 are respectively disposed on opposite sides of the diaphragm 5 along the first direction. One end of each skeleton 414 extends into a through hole 25 and is connected to the inner connecting part 54. The other ends of the two skeletons 414 are respectively connected to the first diaphragm assembly 31 and the second diaphragm assembly 32.

[0105] In this embodiment, as Figure 4 As shown, by setting each connector 4 as two skeletons 414 arranged along the first direction, the two skeletons 414 are respectively located on opposite sides of each diaphragm 5 along the first direction. In this way, the two skeletons 414 are connected to the first diaphragm assembly 31 and the second diaphragm assembly 32 respectively, so as to realize the linkage between the first diaphragm assembly 31 and the second diaphragm assembly 32, and reduce the length of the skeleton 414 in the first direction, thereby improving the structural strength and processing difficulty of the skeleton 414.

[0106] It should be noted that the structure of a single skeleton 414 can be similar to the structure of the connector 4 in the above embodiments, and is not limited here. Optionally, the two skeletons 414 are symmetrically arranged with respect to the inner connecting part 54. Of course, in other embodiments, the two skeletons 414 may also be asymmetrical. In this case, the structures of the two skeletons 414 may be exactly the same or different, and is not limited here.

[0107] In this embodiment, the two diaphragms 5 can be either closed diaphragms or annular diaphragms. As long as each diaphragm 5 cooperates with each connector 4 to seal the through hole 25, thereby isolating the first rear cavity 6 and the first front cavity 7 from each other, no limitation is made here.

[0108] In one embodiment, each diaphragm 5 includes an inner connecting portion 54, a folded ring portion 52 surrounding the inner connecting portion 54, and an outer connecting portion 55 surrounding the folded ring portion 52. The outer connecting portion 55 is connected to the magnetic circuit system 2. Optionally, an inner connecting portion 54 of each diaphragm 5 is sandwiched between a connector 4 and the first diaphragm assembly 31 or the second diaphragm assembly 32.

[0109] In this embodiment, as Figures 2 to 5 , Figure 18 and Figure 19As shown, the two diaphragms 5 can be selected as closed diaphragms. In this case, the inner connecting portion 54 of the diaphragm 5 is sandwiched between the connector 4 and the first diaphragm assembly 31 or the second diaphragm assembly 32, and the outer connecting portion 55 is connected to the magnetic circuit system 2, thereby completely sealing the through hole 25 using the diaphragm 5. It can be understood that at least part of the shape or outline of the inner connecting portion 54 of the diaphragm 5 is similar to the shape or outline of one end of the connector 4.

[0110] Understandably, the folded ring portion 52 of the diaphragm 5 can deform to ensure that the inner connecting portion 54 of the diaphragm 5 does not affect the connection relationship between the outer connecting portion 55 of the diaphragm 5 and the magnetic circuit system 2 when the connecting member 4 vibrates, thereby ensuring the sealing performance of the through hole 25.

[0111] It should be noted that the folded ring portion 52 of the diaphragm 5 can be an upwardly convex hull structure or a downwardly concave hull structure. The folded ring portion 52 of the diaphragm 5 is similar in structure or function to the first folded ring of the first diaphragm 311 and the second folded ring of the second diaphragm 321, and is not limited here.

[0112] In one embodiment, the outer connecting portion 55 of each diaphragm 5 is connected to the side of the magnetic circuit system 2 near the first diaphragm assembly 31, and the inner connecting portion 54 of each diaphragm 5 is sandwiched between a connector 4 and the first diaphragm assembly 31.

[0113] In another embodiment, the outer connecting portion 55 of each diaphragm 5 is connected to the side of the magnetic circuit system 2 near the second diaphragm assembly 32, and the inner connecting portion 54 of each diaphragm 5 is sandwiched between a connector 4 and the second diaphragm assembly 32.

[0114] Optionally, the outer connecting parts 55 of the two diaphragms 5 are both connected to the side of the magnetic circuit system 2 near the second diaphragm assembly 32, and the inner connecting parts 54 of the two diaphragms 5 are respectively sandwiched between the two connectors 4 and the second diaphragm assembly 32. The two connectors 4 are each provided with a first through hole that connects to the first rear cavity 6.

[0115] Of course, in other embodiments, the outer connecting portion 55 of one diaphragm 5 is connected to the side of the magnetic circuit system 2 near the first diaphragm assembly 31, and the inner connecting portion 54 of one diaphragm 5 is sandwiched between a connector 4 and the first diaphragm assembly 31. The outer connecting portion 55 of another diaphragm 5 is connected to the side of the magnetic circuit system 2 near the second diaphragm assembly 32, and the inner connecting portion 54 of another diaphragm 5 is sandwiched between a connector 4 and the second diaphragm assembly 32, which is not limited here.

[0116] Optionally, both diaphragms 5 are annular. In one embodiment, each diaphragm 5 includes an inner connecting portion 54, a folded ring portion 52 surrounding the inner connecting portion 54, and an outer connecting portion 55 surrounding the folded ring portion 52. The outer connecting portion 55 is connected to the magnetic circuit system 2. The inner connecting portion 54 has an inner annular hole 541 so that the diaphragm 5 is an annular diaphragm. A connector 4 passes through an inner annular hole 541. The inner connecting portion 54 is connected to the outside of the connector 4 to close the through hole 25.

[0117] In this embodiment, as Figure 20 As shown, by setting the diaphragm 5 as an annular diaphragm, the processing cost of the diaphragm 5 can be effectively saved. A through hole structure, namely an inner annular hole 541, is formed in the center of the inner connecting part 54 of the diaphragm 5. The connector 4 passes through the inner annular hole 541 of the inner connecting part 54, and the inner connecting part 54 is connected to the outside of the connector 4. The outer connecting part 55 is connected to the magnetic circuit system 2 to close the through hole 25.

[0118] Understandably, the inner connecting portion 54 of the diaphragm 5 can be adjusted in shape according to the outer contour of the connector 4, as long as it can completely seal the through hole 25 with the connector 4, and is not limited here. In order to improve the connection strength and sealing performance between the inner connecting portion 54 of the diaphragm 5 and the outer wall of the connector 4, in one embodiment, a connecting platform is formed on the outer wall of the connector 4, and the inner connecting portion 54 is supported and connected to the connecting platform.

[0119] It should be noted that both diaphragms 5 can be set as closed diaphragms; or both diaphragms 5 can be set as annular diaphragms; or one of the two diaphragms 5 can be a closed diaphragm and the other annular diaphragm, which is not limited here.

[0120] In one embodiment, the edge magnetic part 23 includes an edge magnet 231 and an edge magnetic plate 232 stacked together, and the edge magnet 231 is connected to the magnetic yoke 21; each center magnetic part 22 includes a center magnet 221 and a center magnetic plate 222 stacked together, and the center magnet 221 is connected to the magnetic yoke 21.

[0121] Optionally, the side magnet 231 and the two center magnets 221 are all magnetized along the first direction, the magnetization directions of the two center magnets 221 are opposite, and the magnetization directions of adjacent side magnets 231 and center magnets 221 are opposite, and the current directions in adjacent long axis sides 331 of the two voice coils 33 are the same.

[0122] Understandably, the side magnet 231 and the central magnet 221 on the same side of the second magnetic gap 242 between the two central magnets 221 have opposite magnetization directions. Utilizing the magnetic focusing effect of the central magnetic plate 222 and the side magnetic plate 232, each central magnet 221 cooperates with the other central magnet 221 and the side magnet 231 to form a magnetic circuit passing through the magnetic gap 25. This allows more magnetic field lines of the magnetic circuit system 2 to pass through the voice coil 33 located within the magnetic gap, thereby increasing the driving force on the voice coil 33. Simultaneously, by utilizing the opposite magnetization directions of the two central magnets 221, more magnetic field lines generated by the two adjacent central magnets 221 pass through the adjacent long axis sides 331 of the two voice coils 33, thereby increasing the driving force on the voice coil 33. This improves the performance of the sound-generating device 100.

[0123] In this embodiment, each central magnetic part 22 includes a central magnet 221 disposed on the magnetic yoke 21 and a central magnetic plate 222 disposed on the top of the central magnet 221. It can be understood that the magnetic yoke 21 has two first inner holes, each central magnet 221 has a second inner hole corresponding to one of the first inner holes, and each central magnetic plate 222 has a third inner hole. Each first inner hole, each second inner hole, and each third inner hole correspond one-to-one along the first direction and are connected to form a through hole 25.

[0124] Understandably, the magnetic circuit system 2 is provided from bottom to top with a magnetic yoke 21, two central magnets 221 and two central magnetic plates 222. The magnetic yoke 21 has two first inner holes, each central magnet 221 has a second inner hole, and each central magnetic plate 222 has a third inner hole. Each first inner hole, each second inner hole and each third inner hole are connected along the first direction to form a through hole 25. That is, each through hole 25 directly penetrates the magnetic yoke 21, a central magnet 221 and a central magnetic plate 222. The linkage between the first diaphragm assembly 31 and the second diaphragm assembly 32 is realized by using two connectors 4 in the two through holes 25. This form is simple, and by setting a diaphragm 5 at each through hole 25, the first rear cavity 6 and the first front cavity 7 are isolated from each other, thereby avoiding mutual interference of sound wave airflow.

[0125] It should be noted that, in order to increase the linkage between the first diaphragm assembly 31 and the second diaphragm assembly 32, multiple through holes 25 are provided, and a connector 4 and a diaphragm 5 are provided for each through hole, that is, the through holes 25, connectors 4 and diaphragms 5 are provided in a one-to-one correspondence. Of course, the through holes 25 can be located in the center of the magnetic circuit system 2 or at the edge of the magnetic circuit system 2, that is, the through holes 25 directly penetrate the magnetic yoke 21 and the side magnetic part 23, which is not limited here.

[0126] Understandably, each central magnetic part 22 can be formed by a central magnet 221 and a central magnetic plate 222, with a through hole 25 provided in the center of the central magnetic part 22 by drilling or punching. Of course, each central magnetic part 22 can also be formed by multiple central magnets 221 and multiple central magnetic plates 222, in which case the multiple central magnets 221 and multiple central magnetic plates 222 surround to form the through hole 25, which is not limited here.

[0127] Understandably, the side magnetic portion 23 includes a baffle formed by bending the outer periphery of the self-conducting magnetic yoke 21, and the first magnetic gap 241 is formed between the central magnet 221 and the baffle. Alternatively, the side magnetic portion 23 includes a side magnet 231 disposed on the self-conducting magnetic yoke 21 and a side magnetic plate 232 disposed on the top of the side magnet 231, and the first magnetic gap 241 is formed between the central magnet 221 and the side magnet 231.

[0128] It should be noted that the side magnetic part 23 can be a ring structure, disposed on the outside of the two central magnetic parts 22; or, the side magnetic part 23 includes multiple side magnetic parts 23, which are connected end to end to form a ring disposed on the outside of the two central magnetic parts 22; or, the multiple side magnetic parts 23 are spaced apart and surround the outside of the two central magnetic parts 22, which is not limited here.

[0129] Optionally, two or four edge magnet portions 23 may be provided. In this embodiment, two or four edge magnets 231 forming the edge magnet portion 23 may be provided, and correspondingly, two or four edge magnetic guide plates 232 provided on the top of the edge magnets 231 may be provided; alternatively, when four edge magnets 231 are provided, the edge magnetic guide plates 232 may form a ring structure covering the top of the four edge magnets 231, which facilitates mass production.

[0130] In order to facilitate the connection between each diaphragm 5 and a central magnet 22 without affecting the vibration of the first diaphragm assembly 31, in this embodiment, the magnetic circuit system 2 is provided with a first step portion 223 corresponding to each external connection portion 55.

[0131] In one embodiment, each central magnetic part 22 has a first stepped portion 223 surrounding the through hole 25 on one side opposite to the guide yoke 21, and an external connecting portion 55 is connected to the first stepped portion 223. In this embodiment, as... Figures 2 to 8 As shown, each central magnetic plate 222 has a first stepped portion 223 surrounding the through hole 25 on the side opposite to the central magnet 221, and the outer connecting portion 55 of each diaphragm 5 is connected to the first stepped portion 223. It can be understood that each first stepped portion 223 is arranged around a through hole 25.

[0132] Of course, when the outer connecting portion 55 of the diaphragm 5 is connected to the magnetic yoke 21, in order to facilitate the connection between the diaphragm 5 and the magnetic yoke 21 and not affect the vibration of the second diaphragm assembly 32, in one embodiment, the magnetic yoke 21 has a second stepped portion around each through hole 25 on the side facing away from the central magnetic portion 22, and the outer connecting portion 55 of each diaphragm 5 is connected to the second stepped portion. Each second stepped portion surrounds a through hole 25, which is not limited here.

[0133] In one implementation, such as Figures 2 to 4 , Figure 7 As shown, a support platform 121 is provided adjacent to the first housing 11 in the second housing 12, and the periphery of the magnetic yoke 21 is supported and fixed to the support platform 121. This achieves stable fixation of the magnetic yoke 21, thereby providing stable support for the central magnetic part 22 and the peripheral magnetic part 23. In other embodiments, the second housing 12 may optionally be an injection molded part, with the second housing 12 and the magnetic yoke 21 integrally injection molded. It is understood that this arrangement improves the connection stability between the second housing 12 and the magnetic yoke 21.

[0134] Optionally, the side magnetic plate 232 of the side magnetic part 23 and the outer shell 1 are integrally injection molded or integrally molded, which is not limited here.

[0135] In one embodiment, the side magnet part 23 includes a side magnet 231 and a side magnetic plate 232 stacked together. The side magnet 231 is connected to the side of the magnetic yoke 21 facing away from the second diaphragm assembly 32. The first housing 11 is a metal part, and the first housing 11 and the side magnetic plate 232 are integrally formed.

[0136] In this embodiment, as Figures 2 to 8 As shown, the first housing 11 of the outer shell 1 can be a metal part. The first housing 11 and the side magnetic plate 232 are integrally formed by stretching and molding, which is not limited here. Of course, in other embodiments, when the first housing 11 of the outer shell 1 is an injection molded part, the first housing 11 and the side magnetic plate 232 are integrally injection molded, which is not limited here.

[0137] In one embodiment, the vibration system 3 further includes a centering support 34, which includes a first outer fixing part, a first inner fixing part, and a first elastic arm part connecting the first outer fixing part and the first inner fixing part. The first outer fixing part is connected to the outer shell 1, and the first inner fixing part is connected to the end of the voice coil 33 facing away from the first diaphragm assembly 31.

[0138] In this embodiment, as Figure 1 , Figure 3 , Figure 5 As shown, by using the centering support 34 to center the voice coil 33, the voice coil 33 is prevented from being polarized or oscillating during vibration, thereby improving the operational stability of the first diaphragm assembly 31.

[0139] In one embodiment, the voice coil 33 has two first long axis sides 331 and two first short axis sides connected end to end, and the centering support 34 includes two, with the two centering support 34 respectively corresponding to the two first short axis sides.

[0140] In this embodiment, as Figure 5 As shown, the centering support 34 can be selected as two, with the two centering supports 34 respectively located at both ends of the two first short shaft sides corresponding to the voice coil 33 in the magnetic circuit system 2. This is not limited here. Understandably, this arrangement effectively utilizes space and avoids interference between the centering support 34 and the magnetic circuit system 2.

[0141] like Figure 21 As shown, the present invention also proposes a sound-generating module 900, which includes the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is as described in the foregoing embodiments. Since the sound-generating module 900 adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0142] Understandably, the 900 sound module is used in electronic devices. These electronic devices can be mobile phones, headphones, smart wearable devices, smart glasses, etc., and are not limited here.

[0143] In one embodiment, the sound-generating module 900 further includes a module housing 800, which has a receiving cavity and a module sound hole 803 communicating with the receiving cavity. The sound-generating device 100 is disposed in the receiving cavity. A second front cavity 801 is formed between the module housing 800 and the first diaphragm assembly 31 of the sound-generating device 100, and a second rear cavity 802 is formed between the module housing 800 and the second diaphragm assembly 32 of the sound-generating device 100. The module sound hole 803 communicates with the second front cavity 801 and communicates with the first front cavity 7 of the sound-generating device 100 through the sound outlet 122 of the sound-generating device 100.

[0144] In this embodiment, as Figure 21 As shown, the module housing 800 of the sound-generating module 900 is used to install, fix, and protect the sound-generating device 100. It is understood that the magnetic circuit system 2 and vibration system 3 of the sound-generating device 100 can be directly installed in the module housing 800. Of course, the sound-generating device 100 can also be configured as an integrated modular structure installed in the module housing 800; this is not limited here.

[0145] Understandably, the sound-generating device 100 is installed in the module housing 800, so that a second front cavity 801 is formed between the module housing 800 and the first diaphragm assembly 31, and a second rear cavity 802 is formed between the module housing 800 and the second diaphragm assembly 32.

[0146] In this embodiment, the sound-generating device 100 is further provided with a sound outlet 122 communicating with the first front cavity 7, so that the sound waves radiated by the second diaphragm assembly 32 into the first front cavity 7 are radiated outward through the sound outlet 122. The module housing 800 is provided with a module sound hole 803 communicating with the second front cavity 801. The sound waves radiated by the first diaphragm assembly 31 into the second front cavity 801 are radiated outward through the module sound hole 803. At this time, the module sound hole 803 is communicating with the first front cavity 7 through the sound outlet 122, so that the sound waves radiated by the first diaphragm assembly 31 into the second front cavity 801 and the sound waves radiated by the second diaphragm assembly 32 into the first front cavity 7 are simultaneously radiated outward through the module sound hole 803, thus achieving sound wave superposition, thereby increasing the effective sound-generating area and improving the acoustic performance of the sound-generating module 900.

[0147] In one embodiment, the module housing 800 is further provided with a module vent 804 that communicates with the first rear cavity 6 and the second rear cavity 802 of the sound-generating device 100.

[0148] In this embodiment, as Figure 21 As shown, the module housing 800 is provided with a module vent 804 communicating with the second rear cavity 802. The module vent 804 is connected to the first rear cavity 6 through a vent 13. It can be understood that the acoustic airflow radiated by the first diaphragm assembly 31 to the first rear cavity 6 is radiated outward through the vent 13. The module housing 800 is provided with a module vent 804 communicating with the second rear cavity 802. The acoustic airflow radiated by the second diaphragm assembly 32 to the second rear cavity 802 is radiated outward through the module vent 804. At this time, the module vent 804 is connected to the first rear cavity 6 through the vent 13, so that the acoustic airflow radiated by the second diaphragm assembly 32 to the second rear cavity 802 and the acoustic airflow radiated by the first diaphragm assembly 31 to the first rear cavity 6 are simultaneously radiated outward through the module vent 804.

[0149] It is understandable that the module sound hole 803 and the module vent hole 804 on the module housing 800 can be disposed on different surfaces. The module sound hole 803 can be used to generate sound, and the module vent hole 804 can be used to release air. Of course, in other embodiments, the module sound hole 803 and the module vent hole 804 can also be used simultaneously to achieve noise reduction in the far field. For specific details, please refer to the prior art, which is not limited here.

[0150] In this embodiment, as Figure 21 As shown, the module vent 804 includes multiple vent holes. Parts of the multiple module vent holes 804 form a first vent hole that communicates with the first rear cavity 6 through the vent port 13, and parts of the multiple module vent holes 804 form a second vent hole that communicates with the second rear cavity 802. Optionally, the first vent hole and the vent port 13 are directly opposite and communicate with each other, and the second vent hole communicates with the second rear cavity 802.

[0151] It should be noted that, in order to avoid the acoustic airflow radiated from the module vent 804 and the acoustic airflow radiated from the module acoustic hole 803 from interfering with each other, the module vent 804 and the module acoustic hole 803 are located on different surfaces or different sides of the module housing 800. That is, the first vent and the second vent are located on different surfaces or different sides of the module housing 800 from the module acoustic hole 803. This is not limited here.

[0152] The present invention also proposes an electronic device including the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is as described in the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0153] In this embodiment, the electronic device further includes a device housing, and the sound-generating device 100 is disposed within the device housing. A second front cavity is formed between the first diaphragm assembly 31 of the sound-generating device 100 and the device housing, and a second rear cavity is formed between the second diaphragm assembly 32 of the sound-generating device 100 and the device housing. The device housing has a first sound hole communicating with the second front cavity, and the first sound hole communicates with the first front cavity 7 through a sound outlet 122. The device housing also has a second sound hole communicating with the second rear cavity, and the second sound hole communicates with the first rear cavity 6 through a vent 13.

[0154] Understandably, the first and second acoustic holes of the device housing can be located on different surfaces. The first acoustic hole can be used to generate sound, while the second acoustic hole can be used for venting. Of course, in other embodiments, the first and second acoustic holes can also be used simultaneously to achieve noise reduction in the far field. Specific details are provided in the prior art and are not limited here.

[0155] In this embodiment, the electronic device can be a mobile phone, earphones, smart wearable devices, etc., and is not limited thereto.

[0156] The present invention also proposes an electronic device comprising the aforementioned sound-emitting module 900. The specific structure of the sound-emitting module 900 is as described in the foregoing embodiments. Since this electronic device employs all the technical solutions of all the foregoing embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be elaborated upon here.

[0157] In this embodiment, the electronic device also includes a device housing, and the sound-emitting module 900 is disposed within the device housing. It is understood that the electronic device can be a mobile phone, headphones, smart wearable devices, etc., and is not limited thereto.

[0158] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that, The sound-generating device includes: A vibration system that vibrates along a first direction includes a first diaphragm assembly, a second diaphragm assembly, and two voice coils. The first diaphragm assembly and the second diaphragm assembly are spaced apart along the first direction. The two voice coils are arranged in parallel along a second direction and are both connected to the first diaphragm assembly. Each voice coil has two long axis sides extending along a third direction. The two long axis sides are fitted together. The first direction, the second direction, and the third direction are perpendicular to each other. A magnetic circuit system is disposed between the first diaphragm assembly and the second diaphragm assembly. The magnetic circuit system includes a magnetic yoke, a side magnetic portion and two central magnetic portions disposed on the side of the magnetic yoke facing the first diaphragm assembly. The side magnetic portion is disposed outside the two central magnetic portions and spaced apart from them. A first magnetic gap is formed between the side magnetic portion and the central magnetic portion. The two central magnetic portions are spaced apart along a second direction and form a second magnetic gap between them. The second magnetic gap is connected to the first magnetic gap. The adjacent long axis sides of the two voice coils are respectively disposed corresponding to the second magnetic gap, and the other long axis side is respectively disposed corresponding to the first magnetic gap. The magnetic circuit system also has two through holes, each of which passes through one of the central magnetic portions and the magnetic yoke. Two connectors, each connector passing through one of the through holes, and both ends of each connector being connected to the first diaphragm assembly and the second diaphragm assembly, respectively; and Two diaphragms, each diaphragm including an outer connecting portion, an inner connecting portion and a folded ring portion located between the outer connecting portion and the inner connecting portion, each outer connecting portion being connected to a central magnetic portion, and each inner connecting portion being connected to a connector to close a through hole; The first diaphragm assembly forms a first rear cavity with the magnetic circuit system and the two diaphragms, the second diaphragm assembly forms a first front cavity with the magnetic circuit system and the two diaphragms, and the sound-generating device is also provided with a sound outlet communicating with the first front cavity.

2. The sound-generating device as described in claim 1, characterized in that, The two voice coils are integrally wound from the same conductor; Alternatively, the adjacent long axis edges of the two voice coils may be bonded together.

3. The sound-generating device as described in claim 1, characterized in that, The edge magnetic section includes a stacked edge magnet and an edge magnetic plate, and the edge magnet is connected to the magnetic yoke; each of the central magnetic sections includes a stacked central magnet and a central magnetic plate, and the central magnet is connected to the magnetic yoke. The side magnet and the two center magnets are all magnetized along the first direction. The magnetization directions of the two center magnets are opposite, and the magnetization directions of adjacent side magnets and center magnets are opposite. The current directions in adjacent long axis sides of the two voice coils are the same.

4. The sound-generating device as described in claim 3, characterized in that, Each of the central magnetic plates has a first stepped portion around the through hole on the side facing away from the central magnet, and the outer connecting portion of each diaphragm is connected to the first stepped portion; Alternatively, the magnetic yoke may have a second stepped portion surrounding each of the through holes on the side opposite to the central magnetic part, and the outer connecting portion of each diaphragm may be connected to the second stepped portion.

5. The sound-generating device as described in claim 3, characterized in that, The sound-generating device also includes a housing, the housing having a mounting cavity, the magnetic circuit system being disposed within the mounting cavity, the periphery of the first diaphragm assembly being connected to one end of the housing, and the periphery of the second diaphragm assembly being connected to the other end of the housing; The first diaphragm assembly, the housing, the magnetic circuit system, and the two diaphragms enclose the first rear cavity, and the second diaphragm assembly, the housing, the magnetic circuit system, and the two diaphragms enclose the first front cavity. The housing is provided with the sound outlet.

6. The sound-generating device as described in claim 5, characterized in that, The outer casing includes a first housing and a second housing arranged sequentially along the first direction. The magnetic circuit system is connected to the first housing and the second housing. The end of the first housing away from the second housing is connected to the periphery of the first diaphragm assembly. The end of the second housing away from the first housing is connected to the periphery of the second diaphragm assembly. The second housing is provided with the sound outlet.

7. The sound-generating device as described in claim 6, characterized in that, The outer casing is further provided with a vent that communicates with the first rear cavity; wherein, the vent is located in the first casing; or, the vent is formed between the first casing and the second casing; and / or, the sound outlet and the vent are located on different sides of the outer casing; And / or, the second housing is provided with a support platform adjacent to the first housing, and the periphery of the magnetic yoke is supported and fixed to the support platform; or, the second housing is an injection molded part, and the second housing and the magnetic yoke are integrally injection molded. And / or, the first housing is a metal part, and the first housing and the side magnetic plate are integrally formed.

8. The sound-generating device as claimed in claim 1, characterized in that, Each of the connectors is bonded to the first diaphragm assembly and the second diaphragm assembly at both ends.

9. The sound-generating device as described in claim 8, characterized in that, The connector is a tubular shape with one open end and one closed end. The connector has an open end and a closed end, and the outer diameter of the open end is larger than the outer diameter of the closed end. The second diaphragm assembly is connected to the open end, and the first diaphragm assembly is connected to the closed end. The connector is bent and extended at the open end to form a bent portion, and the bent portion is connected to the second diaphragm assembly. The bent portion is formed by bending the open end. And / or, the magnetic circuit system has a clearance area corresponding to the bent portion. And / or, the connector is provided with a first through hole communicating with the first rear cavity.

10. The sound-generating device as claimed in claim 1, characterized in that, An inner connecting portion is sandwiched between a connector and the first diaphragm assembly or the second diaphragm assembly; Alternatively, the inner connecting part is provided with an inner ring hole so that the diaphragm is an annular diaphragm, and a connector passes through one of the inner ring holes. The inner connecting part is connected to the outside of the connector to close the through hole. Alternatively, each of the connectors includes two skeletons arranged along the first direction, the two skeletons being respectively disposed on opposite sides of the diaphragm along the first direction, one end of each of the two skeletons extending into a through hole and connected to the inner connecting portion, and the other ends of the two connectors being respectively connected to the first diaphragm assembly and the second diaphragm assembly.

11. A sound-generating module, characterized in that, The sound-generating module includes: A module housing, the module housing having a receiving cavity and a module acoustic port communicating with the receiving cavity; and The sound-generating device as described in any one of claims 1 to 10, wherein the sound-generating device is disposed within the accommodating cavity, a second front cavity is formed between the module housing and the first diaphragm assembly of the sound-generating device, and a second rear cavity is formed between the module housing and the second diaphragm assembly of the sound-generating device; The module's sound hole is connected to the second front cavity, and is connected to the first front cavity of the sound-generating device through the sound outlet of the sound-generating device.

12. The sound-generating module as described in claim 11, characterized in that, The module housing is also provided with a module vent hole that communicates with the first rear cavity and the second rear cavity of the sound-generating device.

13. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 10; Alternatively, the electronic device may include the sound-generating module as described in claim 11 or 12.

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