Sound production device and electronic device

Abstract

This invention discloses a sound-generating device and an electronic device, relating to the field of electroacoustic transduction technology. The sound-generating device has a magnetic circuit system with a magnetic gap and a through-hole penetrating the magnetic circuit system. A first diaphragm assembly and a second diaphragm assembly of the vibration system are respectively disposed on opposite sides of the magnetic circuit system along a first direction. A voice coil is connected to the first diaphragm assembly and is correspondingly arranged with the magnetic gap. A connector passes through the through-hole, and both ends of the connector are connected to the first diaphragm assembly and the second diaphragm assembly, respectively. The outer connecting part of the diaphragm is connected to the magnetic circuit system, and the inner connecting part is connected to the connector to seal the through-hole. A first rear cavity is formed between the first diaphragm assembly, the magnetic circuit system, and the diaphragm; a first front cavity is formed between the second diaphragm assembly, the magnetic circuit system, and the diaphragm. 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 and an 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 and electronic device that addresses the problem of limited effective sound-generating area in existing vibration systems. This invention provides a way to significantly increase the effective sound-generating area of ​​the sound-generating device without increasing 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 magnetic circuit system, wherein the magnetic circuit system is provided with a magnetic gap and a through hole penetrating the magnetic circuit system; A vibration system that vibrates along a first direction, the vibration system including a first diaphragm assembly, a second diaphragm assembly and a voice coil, the first diaphragm assembly and the second diaphragm assembly being respectively disposed on opposite sides of the magnetic circuit system along the first direction, the voice coil being connected to the first diaphragm assembly and correspondingly disposed with respect to the magnetic gap; A connector, which passes through the through hole, and has a first end connected to the first diaphragm assembly and a second end connected to the second diaphragm assembly; and The diaphragm includes an outer connecting portion, an inner connecting portion, and a folded ring portion located between the outer connecting portion and the inner connecting portion. The outer connecting portion is connected to the magnetic circuit system and is located on the side of the magnetic circuit system near the first diaphragm assembly. The inner connecting portion is connected to the connector to close the through hole. The first diaphragm assembly forms a first rear cavity with the magnetic circuit system and the diaphragm, the second diaphragm assembly forms a first front cavity with the magnetic circuit system and the diaphragm, and the sound-generating device is also provided with a sound outlet communicating with the first front cavity.

[0007] In one embodiment, the first end or the second end is an open end, the connector is bent at the open end to form a bent portion, and the magnetic circuit system has a clearance area corresponding to the bent portion; And / or, the magnetic circuit system has a first step portion corresponding to the external connection portion.

[0008] In one embodiment, the inner connecting portion is connected to the outer wall of the connector; or, the inner connecting portion is sandwiched between the first end and the first diaphragm assembly; or, the outer wall of the connector is formed with a connecting platform, and the inner connecting portion is supported and connected to the connecting platform. And / or, the sidewall of the connector has a stepped cross-sectional shape along the first direction, and the connector has a clearance space to avoid the folded ring portion.

[0009] In one embodiment, the sound-generating device is provided with a vent that communicates with the first rear cavity.

[0010] In one embodiment, the first diaphragm assembly includes a first diaphragm and a first diaphragm plate connected to the first diaphragm, and the voice coil is connected to the first diaphragm plate; the second diaphragm assembly includes a second diaphragm and a second diaphragm plate connected to the second diaphragm. The connecting member is integrally formed with the first or second vibrating plate.

[0011] In one embodiment, the first vibrating plate is provided with a first protrusion extending toward the through hole, the first protrusion passing through the through hole and connecting to the second vibrating plate, the first protrusion forming the connecting member; Alternatively, the second vibrating plate may have a second protrusion extending toward the through hole, the second protrusion passing through the through hole and connecting to the first vibrating plate, the second protrusion forming the connector.

[0012] In one embodiment, the magnetic circuit system includes a magnetic yoke and a central magnetic portion and a side magnetic portion disposed on the magnetic yoke. The side magnetic portion is located outside the central magnetic portion and is spaced apart from the central magnetic portion to form the magnetic gap. The through hole passes through the central magnetic portion and the magnetic yoke. The first diaphragm assembly is opposite to and spaced apart from the central magnetic part and the side magnetic part, and the second diaphragm assembly is opposite to and spaced apart from the magnetic yoke.

[0013] In one embodiment, the central magnetic part has a first stepped portion surrounding the through hole on the side opposite to the magnetic yoke, and the outer connecting part is connected to the first stepped portion.

[0014] 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 diaphragm together form the first rear cavity, and the second diaphragm assembly, the housing, the magnetic circuit system, and the diaphragm together form the first front cavity. The housing is provided with the sound outlet.

[0015] In one embodiment, the housing includes a first housing and a second housing arranged 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.

[0016] In one embodiment, the sound-generating device is provided with a vent that communicates with the first rear cavity; wherein, the vent is located in the first housing; or, the vent is formed between the first housing and the second housing; 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.

[0017] In one embodiment, the edge magnet part includes an edge magnet and an edge magnetic plate stacked together. The edge magnet is connected to the side of the magnetic yoke facing away from the second diaphragm assembly. The first housing is a metal part, and the first housing and the edge magnetic plate are integrally formed. And / 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 and the second housing are bonded together; or, the first housing and the second housing are connected by a fastener; And / or, the sound-generating device is provided with a vent that communicates with the first rear cavity, and the sound outlet and the vent are located on different sides of the outer shell.

[0018] The present invention also proposes an electronic device, which includes the sound-generating device 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. A voice coil is connected to the first diaphragm assembly and correspondingly positioned with respect to the magnetic gap. A through-hole is provided in the magnetic circuit system, and a connector is inserted into the through-hole, with both ends of the connector connected to the first diaphragm assembly and the second diaphragm assembly respectively. A diaphragm is used to connect the magnetic circuit system and the connector to seal the through-hole, forming a first rear cavity between the first diaphragm assembly, the magnetic circuit system, and the diaphragm, and a first front cavity between the second diaphragm assembly, the magnetic circuit system, and the diaphragm. The sound-generating device has a sound outlet communicating with the first front cavity, thus achieving the use of two sets of vibration structures, but only... The structure employs a voice coil and magnetic circuit system to achieve synchronized sound generation from dual-sided diaphragm components. This design not only occupies a small volume, adapting to relatively confined installation spaces and facilitating widespread application in portable terminals, but also effectively increases the sound-generating area through the dual-vibration structure, thereby enhancing sound performance. Simultaneously, during operation, the magnetic circuit system directly drives the voice coil to vibrate the first diaphragm component, which in turn drives the second diaphragm component to generate sound synchronously via a connector within the through-hole. Furthermore, the diaphragm seals the through-hole, isolating the first rear cavity and the first front cavity to prevent cross-flow interference. This allows the sound waves radiated from the second diaphragm component towards the first front cavity and the sound waves radiated from the first diaphragm component towards the side opposite the first rear cavity to radiate outwards simultaneously, achieving sound wave superposition and further enhancing 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 This is a partially exploded schematic diagram of an embodiment of the sound-generating device provided by the present invention. Figure 3 A cross-sectional schematic diagram of an embodiment of the sound-generating device provided by the present invention; Figure 4 A cross-sectional schematic diagram from another perspective of an embodiment of the sound-generating device provided by the present invention; Figure 5 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 6 for Figure 5 A schematic diagram of the decomposition process; Figure 7 for Figure 5 A cross-sectional schematic diagram; Figure 8 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 9 This is a schematic diagram of the structure of the first embodiment of the connector provided by the present invention; Figure 10 for Figure 9 A cross-sectional schematic diagram; Figure 11 This is a schematic diagram of the structure of the second embodiment of the connector provided by the present invention; Figure 12 This is a schematic diagram of the third embodiment of the connector provided by the present invention; Figure 13 This is a schematic diagram of the fourth embodiment of the connector provided by the present invention; Figure 14 This is a structural schematic diagram of the fifth embodiment of the connector provided by the present invention; Figure 15 This is a schematic diagram of the sixth embodiment of the connector provided by the present invention; Figure 16 A schematic diagram of the seventh embodiment of the connector provided by the present invention; Figure 17 A schematic diagram of the structure of the eighth embodiment of the connector provided by the present invention; Figure 18 A schematic diagram of the structure of the ninth embodiment of the connector provided by the present invention; Figure 19 This is a cross-sectional schematic diagram of the tenth embodiment of the connector provided by the present invention; Figure 20 This is a cross-sectional schematic diagram of the eleventh embodiment of the connector provided by the present invention; Figure 21 This is a cross-sectional schematic diagram of the twelfth embodiment of the connector provided by the present invention; Figure 22 This is a cross-sectional schematic diagram of an embodiment of the diaphragm provided by the present invention; Figure 23 This is a cross-sectional schematic diagram of another embodiment of the diaphragm 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; 24. Magnetic gap; 25. Through hole; 3. Vibration system; 31. First diaphragm assembly; 311. First diaphragm; 312. First vibrating plate; 32. Second diaphragm Components; 321, Second diaphragm; 322, Second diaphragm plate; 33, Voice coil; 34, Centering support; 4, Connector; 411, Second end; 412, First end; 413, Bending part; 422, First flange; 424, Second flange; 425, Reinforcing part; 431, First connecting part; 432, Second connecting part; 433, Support part; 434, First section; 435, Second section; 436, Third section; 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.

[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 23 As shown, in this embodiment of the invention, the sound-generating device 100 includes a magnetic circuit system 2, a vibration system 3, and a diaphragm 5. The magnetic circuit system 2 is provided with a magnetic gap 24 and a through hole 25 penetrating the magnetic circuit system 2. The vibration system 3 vibrates along a first direction. The vibration system 3 includes a first diaphragm assembly 31, a second diaphragm assembly 32, and a voice coil 33. The first diaphragm assembly 31 and the second diaphragm assembly 32 are respectively disposed on opposite sides of the magnetic circuit system 2 along the first direction. The voice coil 33 is connected to the first diaphragm assembly 31 and is correspondingly disposed with respect to the magnetic gap 24. A connecting member 4 passes through the through hole 25, and the connecting member 4 has a first end 412 connected to the first diaphragm assembly 31 and a second end 412 connected to the magnetic gap 24. The second end 411 of the second diaphragm assembly 32 is connected. The diaphragm 5 includes an outer connecting part 55, an inner connecting part 54, and a folded ring part 52 located between the outer connecting part 55 and the inner connecting part 54. The outer connecting part 55 is connected to the magnetic circuit system 2 and is connected to the side of the magnetic circuit system 2 near the first diaphragm assembly 31. The inner connecting part 54 is connected to the connector 4 to close the through hole 25. The first diaphragm assembly 31 forms a first rear cavity 6 between the magnetic circuit system 2 and the diaphragm 5. The second diaphragm assembly 32 forms a first front cavity 7 between the magnetic circuit system 2 and the diaphragm 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 7 As 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 diaphragm 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 diaphragm 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... Figures 1 to 3 , Figures 5 to 7 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 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 direction perpendicular to the first direction is defined as the second direction, that is, the plane containing the second direction is perpendicular to the first direction. It can be understood that the vertical direction coincides with or is parallel to the first direction.

[0036] Optionally, the sound-generating device 100 is square in shape. The thickness direction of the sound-generating device 100 is defined as a first direction, and the length and width directions of the sound-generating device 100 are defined as second directions, such as... Figures 1 to 7 As shown, no limitations are specified here.

[0037] 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 7 As shown, the outer casing 1 includes a first casing 11 and a second casing 12 arranged along a first direction, and the first casing 11 and the second casing 12 enclose each other to form an installation cavity.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] Optionally, the sound outlet 122 includes multiple outlets, which facilitates the smooth and rapid flow of sound waves, thereby improving the sound production effect.

[0043] 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.

[0044] In this embodiment, as Figure 2 , Figure 3 , Figures 5 to 7 As 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.

[0045] Understandably, the first diaphragm assembly 31 and the second diaphragm assembly 32 can refer to existing forms. The voice coil 33 is connected to the first diaphragm assembly 31 and extends into the magnetic gap 24 of the magnetic circuit system 2. The changing current flowing through the voice coil 33 causes it to vibrate under different magnitudes of Ampere force, which in turn causes the first diaphragm assembly 31 to vibrate. The energy conversion method is electrical energy to mechanical energy to acoustic 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.

[0046] In this embodiment, as Figures 1 to 7As shown, by configuring the vibration system 3 as a first diaphragm assembly 31 and a second diaphragm assembly 32 that are opposite to and spaced apart along a first direction, and by configuring the magnetic circuit system 2 between the first diaphragm assembly 31 and the second diaphragm assembly 32, and configuring it opposite to and spaced apart from both the first diaphragm assembly 31 and the second diaphragm assembly 32, one end of the voice coil 33 is connected to the first diaphragm assembly 31, and the other end of the voice coil 33 is correspondingly configured with the magnetic gap 24, and a through hole 25 is provided in the magnetic circuit system 2, and the connector 4 is inserted into the through hole 25, so that the first end 412 of the connector 4 is connected to the first diaphragm assembly 31, and the second end 411 of the connector 4 is connected to the second diaphragm assembly 32, and a diaphragm 5 is provided at the through hole 25, the outer connecting part 55 of the diaphragm 5 is connected to the magnetic circuit system 2, and the inner connecting part 54 is connected to the connector 4 to close the through hole 25, so that a first diaphragm assembly 31, the magnetic circuit system 2 and the diaphragm 5 form a first The rear cavity 6, the second diaphragm assembly 32, the magnetic circuit system 2, and the diaphragm 5 form a first front cavity 7, and the sound-generating device 100 is provided with a sound outlet 122 connected to the first front cavity 7. In this way, the magnetic field generated by the magnetic circuit system 2 acts on the voice coil 33 to drive the voice coil 33 to drive the first diaphragm assembly 31 to vibrate in the first direction. At this time, since the two ends of the connector 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 generation through the connector 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 uses one set of voice coil 33 and magnetic circuit system 2 to achieve the linkage sound generation of the double-sided diaphragm assembly. This structure not only occupies a small volume and can adapt to relatively small installation spaces, making it easy to be widely used in portable terminals, but also effectively increases the sound generation area by utilizing the dual vibration structure, thereby improving the sound generation performance of the sound-generating device 100.

[0047] Understandably, when the sound-generating device 100 of the present invention is working, the magnetic circuit system 2 first directly drives the voice coil 33 to drive the first diaphragm assembly 31 to vibrate. Since the diaphragm 5 is used to close the through hole 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 simultaneously radiated outward through the sound outlet 122, thereby achieving sound wave superposition and further improving the sound generation effect of the sound-generating device 100.

[0048] 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.

[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 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 connector 4 and the inner wall surface of the through hole 25 can provide clearance for the vibration of the diaphragm 5. There is no limitation here.

[0051] In this embodiment, the through hole 25 is located inside the magnetic gap 24, that is, the magnetic gap 24 is arranged around the through hole 25. Optionally, the through hole 25 is located in the center of the magnetic circuit system 2. 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 magnetic gap 24, 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] 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 and a closed end. One of the first diaphragm assembly 31 and the second diaphragm assembly 32 is connected to the open end, and the other of the first diaphragm assembly 31 and the second diaphragm assembly 32 is connected to the closed end.

[0053] In this embodiment, as Figures 2 to 4 , Figures 9 to 13 , Figures 19 to 21As shown, the first end 412 or the second end 411 of the connector 4 is an open end, that is, one end of the connector 4 is open and the other end is closed, making the interior of the connector 4 hollow. Optionally, one of the first end 412 and the second end 411 is an open end and the other is a closed end.

[0054] Understandably, by connecting the open end and the closed end of the connector 4 to the first diaphragm assembly 31 and the second diaphragm assembly 32 respectively, the structural strength of the connector 4 during transmission can be guaranteed, while energy loss can be reduced by decreasing its 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.

[0055] Understandably, the closed end of the connector 4 has a connecting plane, which is connected to one of the first diaphragm assembly 31 and the second diaphragm assembly 32, thus effectively increasing the connecting area and improving the connection stability.

[0056] To further increase the connection area at the open end and improve connection stability, in one embodiment, the connector 4 is bent at the open end to form a bent portion 413. It is understood that both the bent portion 413 and the open end are connected to one of the first diaphragm assembly 31 and the second diaphragm assembly 32.

[0057] In this embodiment, as Figures 2 to 4 , Figures 9 to 13 , Figures 19 to 21 As shown, by bending the open end 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 is located, but this is not limited here.

[0058] 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.

[0059] In one embodiment, the first end 412 or the second end 411 is an open end, and the connector 4 is bent at the open end 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 of the connector 4 is the exposed 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.

[0060] In one embodiment, the first end 412 is a closed end and the second end 411 is an open end. The outer diameter of the first end 412 is smaller than the outer diameter of the second end 411. 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.

[0061] 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 first through hole of the connector 4 connects 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.

[0062] 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.

[0063] 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.

[0064] In one embodiment, the connector 4 is a hollow cylindrical shape with openings at both ends. The connector 4 has a first end 412 and a second end 411. One of the first diaphragm assembly 31 and the second diaphragm assembly 32 is connected to the first end 412, and the other of the first diaphragm assembly 31 and the second diaphragm assembly 32 is connected to the second end 411.

[0065] In this embodiment, as Figure 14 and Figure 15As shown, the connector 4 is a hollow cylindrical shape with open top and bottom. The connector 4 has a first end 412 and a second end 411, 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.

[0066] To further increase the connection area of ​​the first end 412 and improve connection stability, in one embodiment, the first end 412 is folded to form a first flange 422. In this embodiment, as shown... Figure 15 As shown, the first flange 422 is formed by bending and extending the first end 412 along the plane of the first diaphragm assembly 31 or the second diaphragm assembly 32. It can be understood that the surface of the first flange 422 facing the first diaphragm assembly 31 or the second diaphragm assembly 32 is flush with the end face where the first end 412 is located, which is not limited here.

[0067] Similarly, to further increase the connection area of ​​the second end 411 and improve connection stability, in one embodiment, the second end 411 is folded to form a second flange 424. In this embodiment, as... Figure 15 As shown, the second flange 424 is formed by bending and extending the second end 411 along the plane of the first diaphragm assembly 31 or the second diaphragm assembly 32. It can be understood that the surface of the second flange 424 facing the first diaphragm assembly 31 or the second diaphragm assembly 32 is flush with the end face where the second end 411 is located, which is not limited here.

[0068] It should be noted that the first flange 422 is formed by bending and extending the first end 412 outward or inward, and the second flange 424 is formed by bending and extending the second end 411 outward or inward; no specific limitation is made here.

[0069] In one embodiment, the sidewall of the connector 4 is provided with a recessed or protruding reinforcing portion 425. In this embodiment, as... Figure 14 As shown, by providing a reinforcing part 425 on the side wall of the connector 4, the structural strength of the connector 4 can be strengthened, and the connection area between the first end 412 and the second end 411 of the connector 4 and the first diaphragm assembly 31 and the second diaphragm assembly 32 can be increased, thereby improving the connection stability.

[0070] In one embodiment, the connector 4 includes a first connecting portion 431, a second connecting portion 432, and a support portion 433 connected between the first connecting portion 431 and the second connecting portion 432. The first connecting portion 431 and the second connecting portion 432 are arranged opposite to each other along a first direction, and both the first connecting portion 431 and the second connecting portion 432 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 431, and the other of the first diaphragm assembly 31 and the second diaphragm assembly 32 is connected to the second connecting portion 432.

[0071] In this embodiment, as Figures 16 to 18 As shown, by setting the connector 4 into a bracket shape composed of rods, the space occupied is relatively small and the weight is also small.

[0072] Optionally, the support portion 433 extends along a first direction, and the support portion 433 includes one or more. When multiple support portions 433 are included, the multiple support portions 433 are arranged at intervals. In this embodiment, as... Figure 16 As shown, multiple support portions 433 are arranged at intervals along the length direction of the first connecting portion 431 or the second connecting portion 432.

[0073] Understandably, the first connecting part 431 and the second connecting part 432 extend laterally, and the support part 433 extends vertically. Multiple support parts 433, together with the first connecting part 431 and the second connecting part 432, 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.

[0074] In one embodiment, the support portion 433 includes a first segment 434 extending downward from one end of the first connecting portion 431, a second segment 435 extending from the lower end of the first segment 434 along the length direction of the first connecting portion 431 toward the other end of the first connecting portion 431, and a third segment 436 extending downward from the end of the second segment 435 away from the first segment 434 and connected to the second connecting portion 432. In this embodiment, as... Figure 17 As shown, the support part 433 extends in a linear bend, occupying minimal space.

[0075] In one implementation, such as Figure 18 As shown, the support portion 433 includes two parts, which are arranged at an angle and cross each other. Understandably, this arrangement allows the connector 4 to form a more stable structure with a smaller cross-section, thereby further reducing the space occupied.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] In the above embodiments, such as Figures 3 to 4 , Figures 9 to 21 As shown, the connector 4 is separately configured from the first diaphragm assembly 31 and the second diaphragm assembly 32. Optionally, both ends of the connector 4 are bonded to the first diaphragm assembly 31 and the second diaphragm assembly 32, respectively.

[0083] Of course, in other embodiments, the connector 4 is integrally formed with the first diaphragm assembly 31 or the second diaphragm assembly 32, which is not limited here. Optionally, the connector 4 is integrally formed with the first vibrating plate 312 or the second vibrating plate 322.

[0084] In one embodiment, the first vibrating plate 312 is provided with a first protrusion extending toward the through hole 25. The first protrusion passes through the through hole 25 and is connected to the second vibrating plate 322. The first protrusion forms a connector 4.

[0085] 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.

[0086] In another embodiment, the second vibrating plate 322 is provided with a second protrusion extending toward the through hole 25. The second protrusion passes through the through hole 25 and is connected to the first vibrating plate 312. The second protrusion forms a connector 4.

[0087] 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.

[0088] Optionally, such as Figures 2 to 4 , Figure 8 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.

[0089] 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.

[0090] Understandably, in order to further increase the structural strength of the connector 4 and reduce its mass, in one embodiment, the connector 4 is tapered along the first direction. In this embodiment, as... Figure 9 , Figure 10 , Figures 20 to 21 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.

[0091] 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.

[0092] 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.

[0093] Optionally, the cross-sectional shape of the sidewall of the connector 4 along the first direction is stepped, arc-shaped, or straight. In this embodiment, such as... Figures 2 to 4 , Figure 19 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.

[0094] like Figure 20 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.

[0095] In addition, such as Figure 21As 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.

[0096] Of course, such as Figure 10 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.

[0097] In one embodiment, the sidewall of the 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.

[0098] In this embodiment, as Figures 11 to 13 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.

[0099] 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.

[0100] In one embodiment, the 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, and the inner connecting portion 54 is connected to the connector 4 to close the through hole 25.

[0101] In this embodiment, the diaphragm 5 can be a closed diaphragm or an annular diaphragm. As long as the diaphragm 5 and the connector 4 can cooperate to seal the through hole 25, thereby isolating the first rear cavity 6 and the first front cavity 7 from each other, there is no limitation here.

[0102] Understandably, the outer connecting portion 55 of the diaphragm 5 can be connected to the side of the magnetic circuit system 2 near the first diaphragm assembly 31; or, the outer connecting portion 55 of the diaphragm 5 can be connected to the side of the magnetic circuit system 2 near the second diaphragm assembly 32; or, the outer connecting portion 55 of the diaphragm 5 can be connected to the inner wall of the through hole 25 of the magnetic circuit system 2; or, the outer connecting portion 55 of the diaphragm 5 can be sandwiched between the magnetic yoke 21 and the central magnetic part 22 of the magnetic circuit system 2; or, the outer connecting portion 55 of the diaphragm 5 can be sandwiched between the central magnet 221 and the central magnetic plate 222 of the central magnetic part 22 of the magnetic circuit system 2. Any method that enables the connection between the outer connecting portion 55 of the diaphragm 5 and the magnetic circuit system 2 is acceptable and is not limited here.

[0103] In one embodiment, the inner connecting portion 54 is sandwiched between the connector 4 and the first diaphragm assembly 31 or the second diaphragm assembly 32.

[0104] In this embodiment, as Figures 2 to 4 , Figure 22 As shown, the diaphragm 5 can be a closed diaphragm. 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.

[0105] 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.

[0106] 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.

[0107] In one embodiment, the inner connecting portion 54 is sandwiched between the first end 412 and the first diaphragm assembly 31. In this embodiment, the outer connecting portion 55 is optionally connected to the side of the magnetic circuit system 2 closest to the first diaphragm assembly 31. This improves the connection strength of the diaphragm 5 and provides sufficient deformation space for the diaphragm 5.

[0108] Of course, in other embodiments, the inner connecting portion 54 is sandwiched between the second end 411 and the second diaphragm assembly 32. In this embodiment, the outer connecting portion 55 is optionally connected to the side of the magnetic circuit system 2 closest to the second diaphragm assembly 32. This can improve the connection strength of the diaphragm 5 and provide sufficient deformation space for the diaphragm 5.

[0109] Optionally, the connector 4 is provided with a first through hole communicating with the first rear cavity 6. In this embodiment, the outer connecting part 55 is optionally connected to the side of the magnetic circuit system 2 near the second diaphragm assembly 32, and the inner connecting part 54 is sandwiched between the second end 411 and the second diaphragm assembly 32.

[0110] When the diaphragm 5 is annular, in one embodiment, the 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 is provided with an inner ring hole 541. The connector 4 passes through the inner ring hole 541, and the inner connecting portion 54 is connected to the outer wall of the connector 4 to close the through hole 25.

[0111] In this embodiment, as Figure 23 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.

[0112] 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.

[0113] In one embodiment, the magnetic circuit system 2 includes a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 disposed on the magnetic yoke 21. The side magnetic portion 23 is located outside the central magnetic portion 22 and is spaced apart from the central magnetic portion 22 to form a magnetic gap 24. A through hole 25 passes through the central magnetic portion 22 and the magnetic yoke 21. A first diaphragm assembly 31 is opposite to and spaced apart from the central magnetic portion 22 and the side magnetic portion 23, and a second diaphragm assembly 32 is opposite to and spaced apart from the magnetic yoke 21.

[0114] In this embodiment, as Figures 2 to 7 As shown, a magnetic gap 24 for accommodating the voice coil 33 is formed between the central magnetic portion 22 and the side magnetic portion 23 of the magnetic circuit system 2. Optionally, at least one of the central magnetic portion 22 and the side magnetic portion 23 is provided with a permanent magnet.

[0115] Optionally, the through hole 25 extends through the central magnetic part 22 and the magnetic yoke 21, that is, the middle part of the magnetic yoke 21 and the central magnetic part 22 cooperate to form the through hole 25. It is understood that the central magnetic part 22 may include the central magnet 221 or the side wall of the magnetic yoke 21, and the side magnetic part 23 may be the side magnet 231 or the side wall 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, so that the vibration of the first diaphragm assembly 31 is more stable, and the sound generation device 100 is stable in sound generation.

[0116] Since the amplitude of the center part of the first diaphragm assembly 31 corresponding to the central magnet 22 is usually the largest, by using the connector 4 in the through hole 25 to fix the center part of the first diaphragm assembly 31 to the center 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.

[0117] In this embodiment, the central magnetic part 22 includes a central magnet 221 disposed in the middle of 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 a first inner hole, the central magnet 221 has a second inner hole, and the central magnetic plate 222 has a third inner hole. The first inner hole, the second inner hole, and the third inner hole are connected to form a through hole 25.

[0118] Understandably, the magnetic circuit system 2 has a magnetic yoke 21, a central magnet 221, and a central magnetic plate 222 arranged sequentially from bottom to top at its center. The magnetic yoke 21 has a first inner hole, the central magnet 221 has a second inner hole, and the central magnetic plate 222 has a third inner hole. The first, second, and third inner holes are connected to form a central through hole 25, that is, the through hole 25 directly passes through the magnetic yoke 21, the central magnet 221, and the central magnetic plate 222. The linkage between the first diaphragm assembly 31 and the second diaphragm assembly 32 is realized by using the connector 4 in the through hole 25. This form is simple, and by setting a diaphragm 5 at the 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.

[0119] 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.

[0120] Understandably, the 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, the 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.

[0121] Understandably, the side magnetic portion 23 includes a baffle formed by bending the outer periphery of the self-conducting magnetic yoke 21, and a magnetic gap 24 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 magnetic gap 24 is formed between the central magnet 221 and the side magnet 231.

[0122] It should be noted that the side magnetic part 23 can be a ring structure, disposed on the outside of the central magnetic part 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 central magnetic part 22; or, multiple side magnetic parts 23 are spaced apart and surround the outside of the central magnetic part 22, which is not limited here.

[0123] Optionally, two to four edge magnet portions 23 can be provided. In this embodiment, two to four edge magnets 231 forming the edge magnet portion 23 can be provided, and correspondingly, two to four edge magnetic plates 232 provided on the top of the edge magnets 231 can be provided; alternatively, when four edge magnets 231 are provided, the edge magnetic plates 232 can cover the top of the four edge magnets 231 in a ring structure, which can facilitate mass production.

[0124] In order to facilitate the connection between the diaphragm 5 and the central magnetic part 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 part 223 corresponding to the external connection part 55.

[0125] In one embodiment, the 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 the outer connecting part 55 is connected to the first stepped portion 223. In this embodiment, as... Figures 2 to 7 As shown, the central magnetic plate 222 of the central magnetic part 22 has a first step 223 on the side facing away from the central magnet 221, and the first step 223 is arranged around the through hole 25.

[0126] 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 surrounding the through hole 25 on the side facing away from the central magnetic portion 22, and the outer connecting portion 55 is connected to the second stepped portion. The second stepped portion surrounds the through hole 25, which is not limited here.

[0127] In one implementation, such as Figure 3 , Figure 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.

[0128] 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.

[0129] 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.

[0130] In this embodiment, as Figure 3 , Figure 4 , Figure 6 and Figure 7 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.

[0131] 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.

[0132] In this embodiment, as Figure 1 , Figure 2 , Figure 4 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.

[0133] In one embodiment, the voice coil 33 has two first long axis sides 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.

[0134] In this embodiment, as Figure 2 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.

[0135] 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.

[0136] 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 first rear cavity 6 and the second rear cavity communicate directly or through a vent 13 with the internal space of the device housing, thereby achieving the sound-generating performance of the electronic device.

[0137] In this embodiment, the electronic device can be a mobile phone, earphones, smart wearable devices, etc., and is not limited thereto.

[0138] 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 magnetic circuit system, wherein the magnetic circuit system is provided with a magnetic gap and a through hole penetrating the magnetic circuit system; A vibration system that vibrates along a first direction, the vibration system including a first diaphragm assembly, a second diaphragm assembly and a voice coil, the first diaphragm assembly and the second diaphragm assembly being respectively disposed on opposite sides of the magnetic circuit system along the first direction, the voice coil being connected to the first diaphragm assembly and correspondingly disposed with respect to the magnetic gap; A connector, which passes through the through hole, and has a first end connected to the first diaphragm assembly and a second end connected to the second diaphragm assembly; and The diaphragm includes an outer connecting portion, an inner connecting portion, and a folded ring portion located between the outer connecting portion and the inner connecting portion. The outer connecting portion is connected to the magnetic circuit system and is located on the side of the magnetic circuit system near the first diaphragm assembly. The inner connecting portion is connected to the connector to close the through hole. The first diaphragm assembly forms a first rear cavity with the magnetic circuit system and the diaphragm, the second diaphragm assembly forms a first front cavity with the magnetic circuit system and the diaphragm, 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 first end or the second end is an open end, the connector is bent at the open end to form a bent portion, and the magnetic circuit system is provided with a clearance area corresponding to the bent portion; And / or, the magnetic circuit system has a first step portion corresponding to the external connection portion.

3. The sound-generating device as described in claim 1, characterized in that, The inner connecting part is connected to the outer wall of the connector; or, the inner connecting part is sandwiched between the first end and the first diaphragm assembly; or, the outer wall of the connector is formed with a connecting platform, and the inner connecting part is supported and connected to the connecting platform. And / or, the sidewall of the connector has a stepped cross-sectional shape along the first direction, and the connector has a clearance space to avoid the folded ring portion.

4. The sound-generating device as described in claim 1, characterized in that, The sound-generating device is provided with a vent that communicates with the first rear cavity.

5. The sound-generating device as described in claim 1, characterized in that, The first diaphragm assembly includes a first diaphragm and a first diaphragm plate connected to the first diaphragm, and the voice coil is connected to the first diaphragm plate. The second diaphragm assembly includes a second diaphragm and a second diaphragm plate connected to the second diaphragm plate. The connecting member is integrally formed with the first or second vibrating plate.

6. The sound-generating device as described in claim 5, characterized in that, The first vibrating plate is provided with a first protrusion extending toward the through hole, the first protrusion passing through the through hole and connecting to the second vibrating plate, the first protrusion forming the connecting member; Alternatively, the second vibrating plate may have a second protrusion extending toward the through hole, the second protrusion passing through the through hole and connecting to the first vibrating plate, the second protrusion forming the connector.

7. The sound-generating device as described in any one of claims 1 to 6, characterized in that, The magnetic circuit system includes a magnetic yoke and a central magnetic part and a side magnetic part disposed on the magnetic yoke. The side magnetic part is located outside the central magnetic part and is spaced apart from the central magnetic part to form the magnetic gap. The through hole passes through the central magnetic part and the magnetic yoke. The first diaphragm assembly is opposite to and spaced apart from the central magnetic part and the side magnetic part, and the second diaphragm assembly is opposite to and spaced apart from the magnetic yoke.

8. The sound-generating device as claimed in claim 7, characterized in that, The central magnetic part has a first stepped portion around the through hole on the side opposite to the magnetic yoke, and the outer connecting part is connected to the first stepped portion.

9. The sound-generating device as claimed in claim 7, 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 diaphragm together form the first rear cavity, and the second diaphragm assembly, the housing, the magnetic circuit system, and the diaphragm together form the first front cavity. The housing is provided with the sound outlet.

10. The sound-generating device as claimed in claim 9, characterized in that, The outer casing includes a first housing and a second housing arranged 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.

11. The sound-generating device as claimed in claim 10, characterized in that, The sound-generating device is provided with a vent that communicates with the first rear cavity; wherein, the vent is located in the first housing; or, the vent is formed between the first housing and the second housing; 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.

12. The sound-generating device as claimed in claim 10, characterized in that, The edge magnet part includes an edge magnet and an edge magnetic plate stacked together. The edge magnet is connected to the side of the magnetic yoke facing away from the second diaphragm assembly. The first housing is a metal part, and the first housing and the edge magnetic plate are integrally formed. And / 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 and the second housing are bonded together; or, the first housing and the second housing are connected by a fastener; And / or, the sound-generating device is provided with a vent that communicates with the first rear cavity, and the sound outlet and the vent are located on different sides of the outer shell.

13. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 12.

Images