Sound-generating devices and electronic equipment

Abstract

This invention discloses a sound-generating device and an electronic device, relating to the field of electroacoustic transduction technology. The sound-generating device includes a housing, a magnetic circuit system, and a vibration system. A first vibration component and a second vibration component of the vibration system are opposite to each other and spaced apart along a first direction, forming a front acoustic cavity between them. The housing has a sound outlet hole communicating with the front acoustic cavity. The first magnetic circuit component and the second magnetic circuit component of the magnetic circuit system are located on opposite sides of the vibration system along the first direction. Both the first and second voice coils are flat voice coils. A first diaphragm component is recessed towards the front acoustic cavity to form a first groove, and the first voice coil is disposed within the first groove. A second diaphragm component is recessed towards the front acoustic cavity to form a second groove, and the second voice coil is disposed within the second groove. This invention's sound-generating device not only achieves double-sided radiation, improving the sound-generating performance and increasing the overall loudness, but also enables a thin and light design, meeting the thin and light design requirements of terminal products.

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 usually combine high and low frequency speakers, which has gradually led to the trend of multi-functional, miniaturized and high-performance applications.

[0003] As people increasingly demand more advanced functionality in electronic products and pursue aesthetically pleasing, slim, and lightweight designs, the overall space of these devices is becoming increasingly limited, while the performance requirements for speakers are rising. In related technologies, tweeters typically require a housing and a series of assembly processes to achieve module sound production, resulting in a relatively large XYZ dimension of the module and a significant space requirement. Furthermore, to meet the demands of ultra-thin designs, the size of the magnetic circuit system needs to be reduced, which lowers the product's black-white (BL) value and consequently reduces the tweeter's high-frequency performance. Summary of the Invention

[0004] The main objective of this invention is to provide a sound-generating device and an electronic device. The sound-generating device is designed to be thin and light, meeting the needs of end products. It can also achieve double-sided radiation, increasing the radiation area to improve the sound-generating performance and increase the overall loudness of the device.

[0005] To achieve the above objectives, the present invention proposes a sound-generating device, which includes a housing and a magnetic circuit system and a vibration system disposed within the housing;

[0006] The vibration system vibrates along a first direction. The vibration system includes a first vibration component and a second vibration component that are arranged opposite to each other and spaced apart along the first direction. A front acoustic cavity is formed between the first vibration component and the second vibration component. The outer shell is provided with an outlet hole that communicates with the front acoustic cavity. The magnetic circuit system includes a first magnetic circuit assembly and a second magnetic circuit assembly disposed on opposite sides of the vibration system along the first direction. The first magnetic circuit assembly is located on the side of the first vibration assembly facing away from the second vibration assembly along the first direction, and the second magnetic circuit assembly is located on the side of the second vibration assembly facing away from the first vibration assembly along the first direction. The first vibration component includes a first diaphragm assembly and a first voice coil disposed on the side of the first diaphragm assembly facing the first magnetic circuit assembly. The first voice coil and the first magnetic circuit assembly are opposite to each other and spaced apart along the first direction. A first magnetic field generated by the first magnetic circuit assembly acts on the first voice coil to drive the first voice coil to vibrate along the first direction. The second vibration component includes a second diaphragm assembly and a second voice coil disposed on the side of the second diaphragm assembly facing the second magnetic circuit assembly. The second voice coil and the second magnetic circuit assembly are opposite to each other and spaced apart along the first direction. A second magnetic field generated by the second magnetic circuit assembly acts on the second voice coil to drive the second voice coil to vibrate along the first direction. Wherein, both the first voice coil and the second voice coil are flat voice coils, the first diaphragm assembly is provided with a first groove recessed toward the front acoustic cavity, and the first voice coil is disposed in the first groove, the second diaphragm assembly is provided with a second groove recessed toward the front acoustic cavity, and the second voice coil is disposed in the second groove.

[0007] In one embodiment, the first diaphragm assembly includes a first diaphragm plate and a first diaphragm disposed around the first diaphragm plate. The periphery of the first diaphragm plate is connected to the housing. The first voice coil is connected to the first diaphragm plate. The first diaphragm plate is provided with a first groove recessed toward the front acoustic cavity. The first voice coil is disposed in the first groove. The second diaphragm assembly includes a second diaphragm plate and a second diaphragm disposed around the second diaphragm plate. The periphery of the second diaphragm plate is connected to the housing. The second voice coil plate is connected to the second diaphragm plate. The second diaphragm plate is provided with a second groove recessed toward the front acoustic cavity. The second voice coil plate is disposed in the second groove plate.

[0008] In one embodiment, the first diaphragm has a first folded ring, and the second diaphragm has a second folded ring; The first fold ring has a concave direction opposite to that of the second fold ring, and both are concave in a direction away from the front acoustic cavity.

[0009] In one embodiment, the outer shell includes a first shell, an intermediate support member, and a second shell arranged sequentially along the first direction. The first shell, the intermediate support member, and the second shell enclose a receiving cavity. The periphery of the first diaphragm assembly is connected to one end of the first shell and / or the intermediate support member, and the periphery of the second diaphragm assembly is connected to the other end of the second shell and / or the intermediate support member. The first magnetic circuit assembly is disposed inside the first shell, and the second magnetic circuit assembly is disposed inside the second shell. The sound outlet is located on the intermediate support member; or the sound outlet is formed by the first housing, the intermediate support member and the second housing.

[0010] In one embodiment, the periphery of the first diaphragm assembly is sandwiched between one end of the first housing and the intermediate support member, and the periphery of the second diaphragm assembly is sandwiched between the other end of the second housing and the intermediate support member; And / or, the outer casing is made of a metallic material.

[0011] In one embodiment, the first magnetic circuit assembly includes a plurality of first magnets arranged along a second direction, the plurality of first magnets extending along a third direction, and the side of the plurality of first magnets facing the first vibration assembly being exposed in the cavity of the sound-generating device. The second magnetic circuit assembly includes a plurality of second magnets arranged along the second direction, the plurality of second magnets extending along the third direction, the side of the plurality of second magnets facing the second vibration assembly being exposed in the cavity of the sound-generating device, and the plurality of first magnets and the plurality of second magnets being arranged in a one-to-one correspondence along the first direction; The first direction, the second direction, and the third direction are arranged perpendicularly to each other.

[0012] In one embodiment, the first magnetic circuit assembly includes three first magnets, and the second magnetic circuit assembly includes three second magnets; Among them, the three first magnets and the three second magnets are all magnetized along the first direction, the magnetization directions of adjacent first magnets are opposite, the magnetization directions of adjacent second magnets are opposite, and the magnetization directions of opposite first magnets and second magnets along the first direction are opposite. Alternatively, the three first magnets include a first central magnet and two first lateral magnets, with the two first lateral magnets located on either side of the first central magnet along the second direction. The three second magnets include a second central magnet and two second lateral magnets, with the two second lateral magnets located on either side of the second central magnet along the second direction. The first central magnet and the second central magnet are arranged opposite to each other along the first direction. The two first lateral magnets and the two second lateral magnets are arranged in a one-to-one correspondence along the first direction. The first central magnet and the second central magnet are both magnetized along the first direction but in opposite directions. The two first lateral magnets and the two second lateral magnets are both magnetized along the second direction. The magnetic poles of the two first lateral magnets near the first central magnet are the same as the magnetic poles of the first central magnet facing the first vibration component. The magnetic poles of the two second lateral magnets near the second central magnet are the same as the magnetic poles of the second central magnet facing the second vibration component.

[0013] In one embodiment, the three first magnets include a first central magnet and two first side magnets, the two first side magnets being located on opposite sides of the first central magnet along the second direction, the first central magnet having a first protrusion extending toward the first vibration assembly; wherein the projection of the first protrusion along the first direction is located inside the first voice coil; and / or, the height of the first protrusion along the first direction is less than or equal to 0.2 mm; And / or, the three second magnets include a second central magnet and two second side magnets, the two second side magnets being located on both sides of the second central magnet along the second direction, the second central magnet having a second protrusion extending toward the second vibration assembly; wherein, the projection of the second protrusion along the first direction is located inside the second voice coil; and / or, the height of the second protrusion along the first direction is less than or equal to 0.2 mm.

[0014] In one embodiment, the first magnetic circuit assembly includes five first magnets, each of which includes a first central magnet, two first common magnets, and two first side magnets. The two first common magnets are located on opposite sides of the first central magnet along the second direction, and the two first side magnets are located on the side of each first common magnet facing away from the first central magnet. The second magnetic circuit assembly includes five second magnets, each of which includes a second central magnet, two second common magnets, and two second side magnets. The two second common magnets are located on both sides of the second central magnet along the second direction, and the two second side magnets are located on the side of each second common magnet facing away from the second central magnet. Wherein, the first central magnet and the second central magnet are both magnetized along the first direction and the magnetization directions are opposite; the two first side magnets and the two second side magnets are both magnetized along the first direction, the magnetization directions of the two first side magnets are opposite to the magnetization direction of the first central magnet, the magnetization directions of the two second side magnets are opposite to the magnetization direction of the second central magnet, and the magnetization directions of the first side magnets and the second side magnets opposite to each other along the first direction are opposite; the two first common magnets and the two second common magnets are both magnetized along the second direction; the magnetic poles of the two first common magnets near the first central magnet are the same as the magnetic poles of the first central magnet facing the first vibration component; the magnetic poles of the two second common magnets near the second central magnet are the same as the magnetic poles of the second central magnet facing the second vibration component. And / or, the first central magnet has a first protrusion extending toward the first vibrating assembly; wherein the projection of the first protrusion along the first direction is located inside the first voice coil; and / or, the height of the first protrusion along the first direction is less than or equal to 0.2 mm; And / or, the second central magnet has a second protrusion extending toward the second vibrating assembly; wherein the projection of the second protrusion along the first direction is located inside the second voice coil; and / or, the height of the second protrusion along the first direction is less than or equal to 0.2 mm.

[0015] In one embodiment, the thickness of the plurality of first magnets gradually decreases along the first direction from away from the sound outlet to near the sound outlet; And / or, the thickness of the plurality of second magnets along the first direction gradually decreases from the direction away from the sound outlet to the direction closer to the sound outlet.

[0016] In one embodiment, the first vibration assembly further includes a first centering support, 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, and the first inner fixing part is connected to the end of the first voice coil facing away from the first diaphragm assembly. The first voice coil has two first long axis sides and two first short axis sides connected end to end. There are two first centering supports, and the two first centering supports are respectively disposed corresponding to the two first short axis sides. And / or, the second vibration assembly further includes a second centering support, the second centering support including a second outer fixing part, a second inner fixing part, and a second elastic arm part connecting the second outer fixing part and the second inner fixing part, the second outer fixing part being connected to the outer shell, and the second inner fixing part being connected to the end of the second voice coil facing away from the second diaphragm assembly; wherein, the second voice coil has two second long axis sides and two second short axis sides connected end to end, and the second centering support includes two, with the two second centering supports respectively corresponding to the two second short axis sides.

[0017] In one embodiment, the housing has an intermediate horizontal plane extending along a second direction, the second direction being perpendicular to the first direction, and the opposite ends of the housing being equidistant from the intermediate horizontal plane along the first direction; Wherein, the first vibration component and the second vibration component are symmetrically arranged with respect to the intermediate horizontal plane; and / or, the first magnetic circuit component and the second magnetic circuit component are symmetrically arranged with respect to the intermediate horizontal plane.

[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 houses the magnetic circuit system and the vibration system within a housing. This allows for both installation and fixation of the magnetic circuit system and the vibration system, while also providing protection for them. Furthermore, the vibration system is configured with a first vibration component and a second vibration component positioned opposite and spaced apart along a first direction, forming a front acoustic cavity between them. The magnetic circuit system is further configured with a first magnetic circuit component and a second magnetic circuit component positioned on opposite sides of the vibration system along the first direction, with the first magnetic circuit component located on the side of the first vibration component facing away from the second vibration component. The second magnetic circuit assembly is located on the side of the second vibration assembly facing away from the first vibration assembly. The first magnetic field generated by the first magnetic circuit assembly acts on the first voice coil of the first vibration assembly, driving the first voice coil to vibrate the first diaphragm assembly along a first direction. Similarly, the second magnetic field generated by the second magnetic circuit assembly acts on the second voice coil of the second vibration assembly, driving the second voice coil to vibrate the second diaphragm assembly along the first direction. This allows both the first and second diaphragm assemblies to simultaneously radiate sound waves into the front acoustic cavity, which are then radiated outwards through the sound outlet on the outer shell. This use of two vibration systems achieves double-sided radiation, enhancing... Increasing the radiation area improves the acoustic performance of the sound-generating device, thereby enhancing the overall loudness. Furthermore, by utilizing a shared front acoustic cavity between the first and second vibration components, the thickness of the sound-generating device along the first direction can be effectively reduced, achieving a thinner and lighter design that occupies less space and offers advantages for overall device design, meeting the thinner and lighter design requirements of end products. Further, by using flat voice coils for both the first and second voice coils, and providing a first groove recessed into the front acoustic cavity on the first diaphragm assembly and a second groove recessed into the front acoustic cavity on the second diaphragm assembly, the first and second voice coils are respectively located in the first groove and the second groove. Within the two grooves, this not only reduces the height of the first / second voice coil protruding from the first / second diaphragm assembly, making the mating structure between the first / second voice coil and the first / second diaphragm assembly more compact, but also increases the volume of the first / second magnetic circuit assembly while ensuring the vibration of the first / second diaphragm assembly along the first direction. This increases the magnetic field strength and driving force of the first / second magnetic circuit assembly, thereby improving the sound production performance of the sound-generating device. Alternatively, with a fixed vibration amplitude of the first / second voice coil, the thickness of the sound-generating device can be reduced, facilitating a thinner design. 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 view along a third direction in the first embodiment of the sound-generating device provided by the present invention; Figure 3 A cross-sectional view along the second direction in the first embodiment of the sound-generating device provided by the present invention; Figure 4 A cross-sectional schematic diagram from another perspective along the second direction in the first embodiment of the sound-generating device provided by the present invention; Figure 5 An exploded view of the first embodiment of the sound-generating device provided by the present invention; Figure 6 A cross-sectional view along the second direction in the first embodiment of the magnetic circuit system provided by the present invention; Figure 7 A cross-sectional view along a third direction in the second embodiment of the sound-generating device provided by the present invention; Figure 8 A cross-sectional view along the second direction in a second embodiment of the sound-generating device provided by the present invention; Figure 9 A cross-sectional schematic diagram from another perspective along the second direction in a second embodiment of the sound-generating device provided by the present invention; Figure 10 An exploded view of a second embodiment of the sound-generating device provided by the present invention; Figure 11 A cross-sectional schematic diagram along the second direction in a second embodiment of the magnetic circuit system provided by the present invention; Figure 12 A schematic diagram of another embodiment of the sound-generating device provided by the present invention; Figure 13 An exploded view of the third embodiment of the sound-generating device provided by the present invention; Figure 14 A cross-sectional view along a third direction in the third embodiment of the sound-generating device provided by the present invention; Figure 15 A cross-sectional view along the second direction in the third embodiment of the sound-generating device provided by the present invention; Figure 16 A cross-sectional schematic diagram from another perspective along the second direction in the third embodiment of the sound-generating device provided by the present invention; Figure 17 This is a cross-sectional schematic diagram along the second direction in the third embodiment of the magnetic circuit system provided by the present invention.

[0022] Explanation of icon numbers: 100. Sound-generating device; 1. Housing; 11. Receiving cavity; 12. First housing; 13. Intermediate support; 131. Notch; 132. Vertical part; 133. First bending part; 134. Second bending part; 14. Second housing; 15. Sound outlet; 16. Front sound cavity; 17. Rear sound cavity; 2. Vibration system; 21. First vibration assembly; 211. First diaphragm assembly; 2111. First diaphragm; 2112. First surround; 2113. First diaphragm plate; 2114. First groove; 212. First voice coil; 2121. First long axis side; 2122. First short axis side; 213. First centering support; 2131. First external fixing part; 2132. First internal fixing part; 2133. First spring arm part; 22. Second vibration assembly; 221. Second diaphragm assembly; 2211. 2212 Second diaphragm; 2213 Second diaphragm; 2214 Second groove; 222 Second voice coil; 2221 Second long shaft edge; 2222 Second short shaft edge; 223 Second centering support; 2231 Second outer fixing part; 2232 Second inner fixing part; 2233 Second spring arm part; 3. Magnetic circuit system; 31. First magnetic circuit assembly; 311 First magnet; 3111 First center magnet; 3112 First protrusion; 3113 First side magnet; 3114 First common magnet; 3115 First gap; 32. Second magnetic circuit assembly; 321 Second magnet; 3211 Second center magnet; 3212 Second protrusion; 3213 Second side magnet; 3214 Second common magnet; 3215 Second gap; 4. Connector.

[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 this must be based on the ability of those skilled in the art to implement them. 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. It is understood that the sound-generating device 100 is applied to electronic devices, such as mobile phones, headphones, smart wearable devices, etc., and is not limited thereto.

[0029] Please refer to the reference. Figures 1 to 17As shown, in this embodiment of the invention, the sound-generating device 100 includes a housing 1 and a magnetic circuit system 3 and a vibration system 2 disposed within the housing 1. The vibration system 2 vibrates along a first direction and includes a first vibration component 21 and a second vibration component 22 disposed opposite to each other and spaced apart along the first direction. A front acoustic cavity 16 is formed between the first vibration component 21 and the second vibration component 22. The housing 1 is provided with a sound outlet 15 communicating with the front acoustic cavity 16. The magnetic circuit system 3 includes a first magnetic circuit component 31 and a second magnetic circuit component 32 disposed on opposite sides of the vibration system 2 along the first direction. The first magnetic circuit component 31 is located on the side of the first vibration component 21 facing away from the second vibration component 22 along the first direction, and the second magnetic circuit component 32 is located on the side of the second vibration component 22 facing away from the first vibration component 21 along the first direction. The first vibration component 21 includes a first diaphragm component 211 and a first voice coil 212 disposed on the side of the first diaphragm component 211 facing the first magnetic circuit component 31. The first voice coil 212 is positioned opposite to and spaced apart from the first magnetic circuit assembly 31 along a first direction. The first magnetic field generated by the first magnetic circuit assembly 31 acts on the first voice coil 212 to drive the first voice coil 212 to vibrate along the first direction. The second vibration assembly 22 includes a second diaphragm assembly 221 and a second voice coil 222 disposed on the side of the second diaphragm assembly 221 facing the second magnetic circuit assembly 32. The second voice coil 222 is positioned opposite to and spaced apart from the second magnetic circuit assembly 32 along the first direction. The second magnetic field generated by the second magnetic circuit assembly 32 acts on the second voice coil 222 to drive the second voice coil 222 to vibrate along the first direction. The first voice coil 212 and the second voice coil 222 are both flat voice coils. The first diaphragm assembly 211 is provided with a first groove 2114 recessed towards the front acoustic cavity 16, and the first voice coil 212 is disposed in the first groove 2114. The second diaphragm assembly 221 is provided with a second groove 2214 recessed towards the front acoustic cavity 16, and the second voice coil 222 is disposed in the second groove 2214.

[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 the magnetic circuit system 3 and the vibration system 2 of the sound-generating device 100 are housed in the housing 1, so that the housing 1 is used to install, fix and support the magnetic circuit system 3 and the vibration system 2.

[0031] Understandably, the outer casing 1 has a receiving cavity 11, and both the magnetic circuit system 3 and the vibration system 2 are disposed within the receiving cavity 11 of the outer casing 1. To facilitate the assembly of the magnetic circuit system 3 and the vibration system 2, the outer casing 1 may optionally be a split structure. In this embodiment, as... Figures 1 to 5 , Figures 7 to 10 , Figures 12 to 16 As shown, the outer shell 1 includes a first shell 12, a second shell 14, and an intermediate support member 13 located between the first shell 12 and the second shell 14. The first shell 12, the intermediate support member 13, and the second shell 14 of the outer shell 1 enclose and form a receiving cavity 11.

[0032] It should be noted that the first shell 12, the intermediate support 13, and the second shell 14 of the outer casing 1 can be connected by adhesive bonding or welding, and this is not limited thereto. To further improve the connection strength, in one embodiment, such as... Figures 1 to 4 , Figures 7 to 9 As shown, the sound-generating device 100 also includes a plurality of connectors 4 spaced apart, each connector 4 extending along a first direction, and one end of the connector 4 being connected to the first housing 12, and the other end of the connector 4 being connected to the second housing 14.

[0033] Optionally, the first housing 12 and the second housing 14 can be made of metal. In this embodiment, the connector 4 is welded or bonded to the first housing 12 and the second housing 14. This arrangement can improve the connection strength and enhance the drop resistance of the sound-generating device 100.

[0034] It should be noted that the external outline of the sound-generating device 100 can be square, circular, polygonal, irregular, or other shapes, etc., and is not limited thereto. In this embodiment, for example... Figures 1 to 5 , Figures 7 to 10 , Figures 12 to 16 As shown, the sound-generating device 100 may optionally be arranged in a square shape. The vibration direction of the vibration system 2 is a 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 a 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 a third direction, and the third direction is defined as the Y-axis direction. That is, the first direction, the second direction, and the third direction are perpendicular to each other.

[0035] In one embodiment, the sound-generating device 100 is square in shape, the length of the sound-generating device 100 extending along a third direction is defined as the length of the sound-generating device 100, the length of the sound-generating device 100 extending along a second direction is defined as the width of the sound-generating device 100, and the ratio of the length of the sound-generating device 100 to the width of the sound-generating device 100 is 1 to 5.

[0036] In this embodiment, the sound-generating device 100 has a square outer contour, that is, the outer contour of the outer shell 1 of the sound-generating device 100 is a square structure. It is understood that by setting the ratio of the length to the width of the sound-generating device 100 within the range of 1 to 5, the sound-generating device 100 can be adapted to various electronic devices while ensuring a slim and lightweight design. Optionally, the ratio of the length to the width of the sound-generating device 100 can be 1, 2, 3, 4, 5, etc., and is not limited here.

[0037] In this embodiment, as Figures 2 to 11 , Figures 13 to 17As shown, by configuring the vibration system 2 as a first vibration component 21 and a second vibration component 22 arranged opposite to each other and spaced apart along a first direction, a front acoustic cavity 16 is formed between the first vibration component 21 and the second vibration component 22. The magnetic circuit system 3 is configured as a first magnetic circuit component 31 and a second magnetic circuit component 32 arranged on opposite sides of the vibration system 2 along a first direction, such that the first magnetic circuit component 31 is located on the side of the first vibration component 21 facing away from the second vibration component 22, and the second magnetic circuit component 32 is located on the side of the second vibration component 22 facing away from the first vibration component 21. Thus, the first magnetic field generated by the first magnetic circuit component 31 acts on the first voice coil 212 of the first vibration component 21 to drive the first voice coil 212 to drive the first diaphragm assembly 211 to vibrate along the first direction, and the magnetic field generated by the second magnetic circuit component 32... The second magnetic field acts on the second voice coil 222 of the second vibration component 22 to drive the second voice coil 222 to drive the second diaphragm component 221 to vibrate along the first direction. This causes the first diaphragm component 211 and the second diaphragm component 221 to simultaneously radiate sound waves into the front acoustic cavity 16, and radiate the sound waves from the front acoustic cavity 16 out through the sound outlet 15 on the outer shell 1. By using two sets of vibration systems, double-sided radiation is achieved, the radiation area is increased, and the sound performance of the sound generating device 100 is improved, thereby increasing the overall loudness. Furthermore, by using the first vibration component 21 and the second vibration component 22 to share a front acoustic cavity 16, the thickness of the sound generating device 100 along the first direction can be effectively reduced, thereby achieving a thinner and lighter design of the sound generating device 100, occupying less space, which is more advantageous for the overall design and meets the thinner and lighter design requirements of the terminal product.

[0038] In one embodiment, the first diaphragm assembly 211 is provided with a first groove 2114 recessed toward the front acoustic cavity 16, and the first voice coil 212 is disposed in the first groove 2114.

[0039] In this embodiment, as Figures 2 to 5 , Figures 7 to 10 , Figures 13 to 16 As shown, by providing a first groove 2114 recessed towards the front acoustic cavity 16 in the first diaphragm assembly 211, the first voice coil 212 is disposed within the first groove 2114. This reduces the height of the first voice coil 212 protruding from the first diaphragm assembly 211, making the mating structure between the first voice coil 212 and the first diaphragm assembly 211 more compact. While ensuring the vibration of the first diaphragm assembly 211 along the first direction, this increases the volume of the first magnetic circuit assembly 31, thereby improving the magnetic field strength and driving force of the first magnetic circuit assembly 31 and enhancing the sound production performance of the sound-generating device 100. Alternatively, with a fixed vibration amplitude of the first voice coil 212, the thickness of the sound-generating device 100 can be reduced, facilitating a thinner design.

[0040] In one embodiment, the second diaphragm assembly 221 is provided with a second groove 2214 recessed toward the front acoustic cavity 16, and the second voice coil 222 is disposed in the second groove 2214.

[0041] In this embodiment, as Figures 2 to 4 , Figures 7 to 9 , Figures 14 to 16 As shown, by providing a second groove 2214 recessed towards the front acoustic cavity 16 in the second diaphragm assembly 221, the second voice coil 222 is disposed within the second groove 2214. This reduces the height of the second voice coil 222 protruding from the second diaphragm assembly 221, making the mating structure between the second voice coil 222 and the second diaphragm assembly 221 more compact. While ensuring the vibration of the second diaphragm assembly 221 along the first direction, this increases the volume of the second magnetic circuit assembly 32, thereby improving the magnetic field strength and driving force of the second magnetic circuit assembly 32 and enhancing the sound production performance of the sound generating device 100. Alternatively, with a fixed vibration amplitude of the second voice coil 222, the thickness of the sound generating device 100 can be reduced, facilitating a thinner design.

[0042] Understandably, the peripheries of the first vibration component 21 and the second vibration component 22 of the vibration system 2 are both connected to the outer shell 1. That is, the front acoustic cavity 16 located between the first vibration component 21 and the second vibration component 22 is formed by the first vibration component 21, the second vibration component 22 and the outer shell 1. In this embodiment, the side of the first vibration component 21 facing away from the second vibration component 22 is enclosed by the outer shell 1 to form the rear acoustic cavity 17 (i.e., the first rear cavity), and the side of the second vibration component 22 facing away from the first vibration component 21 is enclosed by the outer shell 1 to form the rear acoustic cavity 17 (i.e., the second rear cavity).

[0043] In this embodiment, as Figures 2 to 4 , Figures 7 to 9 , Figures 14 to 16 As shown, the first magnetic circuit component 31 and the second magnetic circuit component 32 of the magnetic circuit system 3 are respectively disposed in the two rear acoustic cavities 17. That is, the first magnetic circuit component 31 is located in the rear acoustic cavity 17 on the side of the first vibration component 21 facing away from the second vibration component 22 (i.e., the first rear cavity), and the second magnetic circuit component 32 is located in the rear acoustic cavity 17 on the side of the second vibration component 22 facing away from the first vibration component 21 (i.e., the second rear cavity). It can be understood that the first magnetic circuit component 31, the first vibration component 21, the second vibration component 22, and the second magnetic circuit component 32 are arranged sequentially at intervals along the first direction.

[0044] It should be noted that, in order to ensure the vibration performance of the first vibration component 21 and the second vibration component 22 of the vibration system 2, the height of the front acoustic cavity 16 located between the first vibration component 21 and the second vibration component 22 along the first direction is greater than or equal to the sum of the amplitudes of the vibration of the first vibration component 21 and the second vibration component 22 along the first direction.

[0045] In this embodiment, when the sound-generating device 100 is working, the first vibration component 21 and the second vibration component 22 of the vibration system 2 simultaneously radiate sound waves into the front acoustic cavity 16. It can be understood that in order to realize the outward radiation of sound waves in the front acoustic cavity 16, the outer shell 1 is provided with a sound outlet 15 communicating with the front acoustic cavity 16, so that sound waves can be radiated outward through the sound outlet 15 of the outer shell 1.

[0046] Optionally, the first vibration component 21 and the second vibration component 22 of the vibration system 2 radiate sound waves into the forward acoustic cavity 16 with the same phase, and the first vibration component 21 and the second vibration component 22 radiate sound waves into the rear acoustic cavity 17 with the same phase. Understandably, this allows the sound waves in the forward acoustic cavity 16 to achieve sound wave superposition, thereby improving the sound production performance of the sound generating device 100 and increasing the overall loudness of the device.

[0047] It should be noted that, in order to ensure the vibration performance of the first vibration component 21 and the second vibration component 22 of the vibration system 2, and to maintain air pressure balance on the opposite sides of the first vibration component 21 and the opposite sides of the second vibration component 22, in this embodiment, the outer shell 1 of the sound generating device 100 is also provided with a vent hole that connects the two rear sound chambers 17, thereby realizing venting, which is not limited here.

[0048] In one embodiment, the first diaphragm assembly 211 includes a first diaphragm 2113 and a first diaphragm 2111 disposed around the first diaphragm 2113. The periphery of the first diaphragm 2111 is connected to the housing 1, and the first voice coil 212 is connected to the first diaphragm 2113.

[0049] In this embodiment, as Figures 2 to 5 , Figures 7 to 10 , Figures 13 to 16 As shown, the first diaphragm 2111 has a first folded ring 2112. Optionally, the first diaphragm 2111 includes the first folded ring 2112, a first outer connecting portion disposed on the outer side of the first folded ring 2112, and a first inner connecting portion disposed on the inner side of the first folded ring 2112. The first outer connecting portion of the first diaphragm 2111 can be connected to the housing 1, and the first inner connecting portion of the first diaphragm 2111 is connected to the first vibrating plate 2113. It should be noted that the first folded ring 2112 of the first diaphragm 2111 can be an upwardly convex bulge structure or a downwardly concave bulge structure.

[0050] Optionally, the first outer connecting portion, the first folded ring 2112, and the first inner connecting portion of the first diaphragm 2111 are integrally formed. In this embodiment, the first outer connecting portion of the first diaphragm 2111 is connected to one side of the first housing 12 and / or the intermediate support member 13. In order to further increase the connection area between the first diaphragm 2111 and the housing 1, and improve the connection stability and sealing, the periphery of the first outer connecting portion of the first diaphragm 2111 is bent and extended in a direction away from the second diaphragm assembly 221 to form a first extension portion, which is connected to the outer wall of the first housing 12.

[0051] In one embodiment, the second diaphragm assembly 221 includes a second diaphragm 2213 and a second diaphragm 2211 disposed around the second diaphragm 2213. The periphery of the second diaphragm 2211 is connected to the housing 1, and the second voice coil 222 is connected to the second diaphragm 2213.

[0052] In this embodiment, as Figures 2 to 5 , Figures 7 to 10 , Figures 13 to 16 As shown, the second diaphragm 2211 has a second folded ring 2212. Optionally, the second diaphragm 2211 includes the second folded ring 2212, a second outer connecting portion disposed on the outer side of the second folded ring 2212, and a second inner connecting portion disposed on the inner side of the second folded ring 2212. The second outer connecting portion of the second diaphragm 2211 can be connected to the housing 1, and the second inner connecting portion of the second diaphragm 2211 is connected to the second vibrating plate 2213. It should be noted that the second folded ring 2212 of the second diaphragm 2211 can be an upwardly convex bulge structure or a downwardly concave bulge structure.

[0053] Optionally, the second outer connecting portion, the second folding ring 2212, and the second inner connecting portion of the second diaphragm 2211 are integrally formed. In this embodiment, the second outer connecting portion of the second diaphragm 2211 is connected to the other side of the second housing 14 and / or the intermediate support member 13. To further increase the connection area between the second diaphragm 2211 and the housing 1, and improve the connection stability and sealing, the periphery of the second outer connecting portion of the second diaphragm 2211 is bent and extended in a direction away from the first diaphragm assembly 211 to form a second extension, which is connected to the outer wall of the second housing 14.

[0054] Optionally, such as Figures 2 to 4 , Figures 7 to 9 , Figures 14 to 16 As shown, the concave direction of the first fold ring 2112 is opposite to that of the second fold ring 2212, and both are concave in a direction away from the front acoustic cavity 16. It can be understood that this arrangement can effectively reduce the height of the front acoustic cavity 16 along the first direction, thereby reducing the thickness and volume of the sound generating device 100 along the first direction and achieving a thinner design.

[0055] In one embodiment, the first diaphragm 2113 is provided with a first groove 2114 recessed toward the front acoustic cavity 16, and the first voice coil 212 is disposed in the first groove 2114.

[0056] In this embodiment, as Figures 2 to 5 , Figures 7 to 10 , Figures 13 to 16 As shown, by providing a first groove 2114 in the first vibrating plate 2113 and placing the first voice coil 212 within the first groove 2114, the height of the first voice coil 212 protruding from the first vibrating plate 2113 is reduced. This increases the volume of the first magnetic circuit assembly 31 while ensuring the vibration of the first diaphragm assembly 211 along the first direction, thereby improving the magnetic field strength and driving force of the first magnetic circuit assembly 31 and enhancing the sound production performance of the sound-generating device 100. Alternatively, with a fixed vibration amplitude of the first voice coil 212, the thickness of the sound-generating device 100 can be reduced, facilitating a thinner design.

[0057] In one embodiment, the second diaphragm 2213 is provided with a second groove 2214 recessed toward the front acoustic cavity 16, and the second voice coil 222 is disposed in the second groove 2214.

[0058] In this embodiment, as Figures 2 to 4 , Figures 7 to 9 , Figures 14 to 16 As shown, by providing a second groove 2214 in the second vibrating plate 2213 and placing the second voice coil 222 within the second groove 2214, the height of the second voice coil 222 protruding from the second diaphragm assembly 221 is reduced. While ensuring the vibration of the second diaphragm assembly 221 along the first direction, the volume of the second magnetic circuit assembly 32 is increased, thereby improving the magnetic field strength and driving force of the second magnetic circuit assembly 32 and enhancing the sound production performance of the sound-generating device 100. Alternatively, with a fixed vibration amplitude of the second voice coil 222, the thickness of the sound-generating device 100 can be reduced, facilitating a thinner design.

[0059] Optionally, the first diaphragm assembly 211 includes a first diaphragm plate 2113 and a first diaphragm 2111 surrounding the first diaphragm plate 2113. The periphery of the first diaphragm 2111 is connected to the outer shell 1. The first voice coil 212 is connected to the first diaphragm plate 2113. The first diaphragm plate 2113 has a first groove 2114 recessed towards the front acoustic cavity 16. The first voice coil 212 is disposed in the first groove 2114. The second diaphragm assembly 221 includes a second diaphragm plate 2213 and a second diaphragm 2211 surrounding the second diaphragm plate 2213. The periphery of the second diaphragm 2211 is connected to the outer shell 1. The second voice coil 222 is connected to the second diaphragm plate 2213. The second diaphragm plate 2213 has a second groove 2214 recessed towards the front acoustic cavity 16. The second voice coil 222 is disposed in the second groove 2214.

[0060] In this embodiment, the outer casing 1 has a middle horizontal plane extending along a second direction, which is perpendicular to the first direction. Optionally, along the first direction, the opposite ends of the outer casing 1 are equidistant from the middle horizontal plane.

[0061] Understandably, this is to ensure that the driving forces of the first magnetic circuit component 31 and the second magnetic circuit component 32 on the first vibration component 21 and the second vibration component 22 are the same or substantially the same. This not only ensures the sound-generating effect of the sound-generating device 100, but also generates approximately equal and opposite driving forces on the first vibration component 21 and the second vibration component 22, effectively canceling out the two driving forces and thus achieving vibration reduction. Optionally, the first magnetic circuit component 31 and the second magnetic circuit component 32 are symmetrically arranged with respect to the intermediate horizontal plane.

[0062] Understandably, to ensure that the radiated sound waves of the first vibrating component 21 and the second vibrating component 22 are in the same or substantially the same phase, the first vibrating component 21 and the second vibrating component 22 are optionally arranged symmetrically with respect to the intermediate horizontal plane. In this embodiment, the first diaphragm assembly 211 and the first voice coil 212 of the first vibrating component 21 and the second diaphragm assembly 221 and the first voice coil 212 of the second vibrating component 22 are both arranged symmetrically with respect to the intermediate horizontal plane, but this is not limited to this.

[0063] In this embodiment, the outer casing 1 can be a metal casing, meaning that the outer casing 1 is made of metal. This not only improves the structural strength and rigidity of the outer casing 1 but also reduces its thickness, thereby increasing its volume. This allows for an increase in the volume of the front acoustic cavity 16 and the rear acoustic cavity 17, thus improving the sound production performance of the sound-generating device 100. Simultaneously, the first magnetic circuit assembly 31 and the second magnetic circuit assembly 32 of the magnetic circuit system 3 in the sound-generating device 100 can also benefit from improved heat dissipation performance through the metal casing, thereby extending their service life.

[0064] In one embodiment, the outer shell 1 includes a first shell 12, an intermediate support 13, and a second shell 14 stacked sequentially along a first direction. The first shell 12, the intermediate support 13, and the second shell 14 enclose a receiving cavity 11. The periphery of the first diaphragm assembly 211 is connected to one end of the first shell 12 and / or the intermediate support 13, and the periphery of the second diaphragm assembly 221 is connected to the other end of the second shell 14 and / or the intermediate support 13. The first magnetic circuit assembly 31 is disposed in the first shell 12, and the second magnetic circuit assembly 32 is disposed in the second shell 14. The sound outlet 15 is disposed in the intermediate support 13; or, the sound outlet 15 is formed by the enclosure of the first shell 12, the intermediate support 13, and the second shell 14.

[0065] In this embodiment, as Figures 1 to 5 , Figures 7 to 10 , Figures 12 to 16As shown, the outer shell 1 is designed in two parts, which facilitates the assembly of the magnetic circuit system 3 and the vibration system 2. The first shell 12, the intermediate support member 13 and the second shell 14 of the outer shell 1 are stacked sequentially along the first direction, so that the first shell 12, the intermediate support member 13 and the second shell 14 enclose and form a receiving cavity 11.

[0066] Understandably, the first magnetic circuit component 31 and the second magnetic circuit component 32 of the magnetic circuit system 3, as well as the first vibration component 21 and the second vibration component 22 of the vibration system 2, are all housed within the receiving cavity 11 of the outer casing 1. This not only secures and installs the magnetic circuit system 3 and the vibration system 2, but also protects them. The assembly and manufacturing process of the sound-generating device 100 of this invention is simpler than that of traditional tweeter modules, with a higher degree of modularity, and easier disassembly and maintenance.

[0067] In order for the first diaphragm assembly 211 and the second diaphragm assembly 221 to vibrate normally, it is understood that the periphery of the first diaphragm assembly 211 is connected to one end of the first housing 12 and / or the intermediate support member 13, and the periphery of the second diaphragm assembly 221 is connected to the other end of the second housing 14 and / or the intermediate support member 13. In this way, the intermediate support member 13 of the housing 1 can be used to support and separate the first diaphragm assembly 211 and the second diaphragm assembly 221, ensuring that the height of the front acoustic cavity 16 between the first diaphragm assembly 211 and the second diaphragm assembly 221 is greater than or equal to the sum of the amplitudes of the vibration of the first diaphragm assembly 211 and the second diaphragm assembly 221 along the first direction.

[0068] In one embodiment, the periphery of the first diaphragm assembly 211 is sandwiched between one end of the first housing 12 and the intermediate support member 13, and the periphery of the second diaphragm assembly 221 is sandwiched between the other end of the second housing 14 and the intermediate support member 13.

[0069] In this embodiment, as Figures 2 to 4 , Figures 7 to 9 , Figures 14 to 16 As shown, the first magnetic circuit assembly 31 is located on the side of the first housing 12 facing the first diaphragm assembly 211, and the second magnetic circuit assembly 32 is located on the side of the second housing 14 facing the second diaphragm assembly 221. That is, the first magnetic circuit assembly 31 and the second magnetic circuit assembly 32 are respectively located in the two rear acoustic cavities 17. In this way, the first magnetic circuit assembly 31 and the second magnetic circuit assembly 32 of the magnetic circuit system 3 can be installed and fixed by the first housing 12 and the second housing 14 of the outer shell 1, respectively.

[0070] Understandably, in order to ensure that the first magnetic circuit assembly 31 forms a magnetic circuit, the first housing 12 of the housing 1 is optionally made of a magnetically conductive material. In order to ensure that the second magnetic circuit assembly 32 forms a magnetic circuit, the second housing 14 of the housing 1 is optionally made of a magnetically conductive material.

[0071] Of course, in other embodiments, the first housing 12 has a first portion connected to the first magnetic circuit assembly 31, and the second housing 14 has a second portion connected to the second magnetic circuit assembly 32. Both the first and second portions are made of magnetically conductive material. This arrangement allows the first magnetic circuit assembly 31 to form a magnetic circuit through the first portion of the first housing 12, causing the first magnetic field generated by the first magnetic circuit assembly 31 to act on the first voice coil 212 to drive the first voice coil 212 to vibrate in a first direction. Similarly, the second magnetic circuit assembly 32 forms a magnetic circuit through the second portion of the second housing 14, causing the second magnetic field generated by the second magnetic circuit assembly 32 to act on the second voice coil 222 to drive the second voice coil 222 to vibrate in the first direction.

[0072] Understandably, in order to ensure the vibration space between the first diaphragm assembly 211 and the first magnetic circuit assembly 31, the periphery of the first housing 12 bends and extends toward the intermediate support 13 along the first direction, so that the first magnetic circuit assembly 31 is away from the first diaphragm assembly 211, thus providing vibration space for the first diaphragm assembly 211.

[0073] Similarly, in order to ensure the vibration space between the second diaphragm assembly 221 and the second magnetic circuit assembly 32, the periphery of the second housing 14 bends and extends toward the intermediate support 13 along the first direction, so that the second magnetic circuit assembly 32 is away from the second diaphragm assembly 221, providing vibration space for the second diaphragm assembly 221.

[0074] In one embodiment, the sound outlet 15 is formed by a first housing 12, an intermediate support 13, and a second housing 14. In this embodiment, as... Figure 1 , Figures 3 to 5 , Figures 8 to 10 As shown, the intermediate support member 13 has a notch 131, and the first shell 12 and the second shell 14 are enclosed with the notch 131 to form a sound outlet 15.

[0075] Understandably, the intermediate support member 13 is arranged in a ring shape, and the notch 131 completely penetrates the edge of the ring-shaped intermediate support member 13 to form an opening structure, so that the intermediate support member 13 forms a semi-ring structure with the notch 131. When the first shell 12, the intermediate support member 13 and the second shell 14 are stacked and arranged along the first direction, the first shell 12 and the second shell 14 are supported and spaced at the notch 131 of the intermediate support member 13, and together with the notch 131 of the intermediate support member 13, they form a sound outlet 15.

[0076] Optionally, the sound outlet 15 includes multiple holes, which facilitates the smooth and rapid flow of sound waves, thereby improving the sound output effect. In this embodiment, the intermediate support member 13 is provided with multiple notches 131 spaced apart along its periphery, so that the first housing 12 and the second housing 14 are surrounded by the multiple notches 131 to form multiple sound outlets 15, which is not limited here.

[0077] In one embodiment, the first housing 12 is folded in the direction of the notch 131 toward the cavity 11 to form a first flange, and the second housing 14 is folded in the direction of the notch 131 toward the cavity 11 to form a second flange. The periphery of the first diaphragm assembly 211 is connected to one side of the first flange and the intermediate support member 13, and the periphery of the second diaphragm assembly 221 is connected to the other side of the second flange and the intermediate support member 13.

[0078] In this embodiment, by providing a first flange portion corresponding to the notch 131 on the first housing 12 and a second flange portion corresponding to the notch 131 on the second housing 14, the periphery of the first diaphragm assembly 211 corresponding to the notch 131 can be fixed by the first flange portion, thereby improving the connection stability of the first diaphragm assembly 211. The periphery of the second diaphragm assembly 221 corresponding to the notch 131 can be fixed by the second flange portion, thereby improving the connection stability of the second diaphragm assembly 221.

[0079] Understandably, the other periphery of the first diaphragm assembly 211 can be fixed to one side of the intermediate support member 13 or sandwiched between the intermediate support member 13 and the first housing 12, and the other periphery of the second diaphragm assembly 221 can be fixed to the other side of the intermediate support member 13 or sandwiched between the intermediate support member 13 and the second housing 14, without limitation.

[0080] In one embodiment, the sound outlet 15 is disposed on the intermediate support member 13. In this embodiment, as shown... Figure 12 , Figure 15 and Figure 16 As shown, the sound outlet 15 passes through the intermediate support member 13 along the second direction to form a through hole structure.

[0081] Understandably, the intermediate support member 13 extends along the first direction, and the dimension of the sound outlet 15 along the first direction is smaller than the length of the intermediate support member 13 extending along the first direction. Optionally, there are multiple sound outlets 15, which facilitates smooth and rapid airflow of sound waves, thereby improving the sound production effect. In this embodiment, the intermediate support member 13 is provided with multiple sound outlets 15 along its periphery, that is, the multiple sound outlets 15 are spaced apart along the periphery of the intermediate support member 13, which is not limited here.

[0082] In one embodiment, the intermediate support member 13 includes a vertical portion 132 and a first bent portion 133 and a second bent portion 134 that are respectively folded into the receiving cavity 11 from both ends of the vertical portion 132. The vertical portion 132 is provided with a sound outlet 15. The periphery of the first diaphragm assembly 211 is connected to the first bent portion 133, and the periphery of the second diaphragm assembly 221 is connected to the second bent portion 134.

[0083] In this embodiment, as Figures 12 to 16As shown, by providing a first bending portion 133 and a second bending portion 134 at both ends of the vertical portion 132 of the intermediate support member 13, the first diaphragm assembly 211 and the second diaphragm assembly 221 are fixed by the first bending portion 133 and the second bending portion 134 respectively, thereby improving the connection stability. Optionally, the sound outlet 15 is provided in the vertical portion 132.

[0084] In one embodiment, the first magnetic circuit assembly 31 includes a plurality of first magnets 311 arranged along a second direction, all of which extend along a third direction, and the side of each of the first magnets 311 facing the first vibration assembly 21 is exposed in the cavity of the sound generating device 100; the second magnetic circuit assembly 32 includes a plurality of second magnets 321 arranged along the second direction, all of which extend along a third direction, and the side of each of the second magnets 321 facing the second vibration assembly 22 is exposed in the cavity of the sound generating device 100; wherein the first direction, the second direction, and the third direction are arranged perpendicularly to each other.

[0085] In this embodiment, as Figures 2 to 11 , Figures 13 to 17 As shown, the first magnetic circuit assembly 31 includes three or five first magnets 311, and the second magnetic circuit assembly 32 includes three or five magnets. Optionally, the plurality of first magnets 311 and the plurality of second magnets 321 are arranged in a one-to-one correspondence along the first direction.

[0086] Understandably, the sides of the multiple first magnets 311 facing the first vibration component 21 are all exposed within the cavity of the sound-generating device 100. This eliminates the need for the magnetic guide plate structure of the first magnetic circuit component 31 in the magnetic circuit system 3, thereby reducing the thickness of the sound-generating device 100 in the Z direction and increasing the volume of the first magnets 311 in the first magnetic circuit component 31, thus improving the BL value. Similarly, the sides of the multiple second magnets 321 facing the second vibration component 22 are all exposed within the cavity of the sound-generating device 100. This eliminates the need for the magnetic guide plate structure of the second magnetic circuit component 32 in the magnetic circuit system 3, thereby reducing the thickness of the sound-generating device 100 in the Z direction and increasing the volume of the second magnets 321 in the second magnetic circuit component 32, thus improving the BL value.

[0087] In one embodiment, the first magnetic circuit assembly 31 includes three first magnets 311, and the second magnetic circuit assembly 32 includes three second magnets 321.

[0088] In this embodiment, as Figures 3 to 6 , Figure 13 , Figures 15 to 17As shown, the first magnetic circuit assembly 31 includes three first magnets 311 arranged along the second direction, all three first magnets 311 extending along the third direction, and the sides of the three first magnets 311 facing the first vibration assembly 21 are exposed in the cavity of the sound generating device 100; the second magnetic circuit assembly 32 includes three second magnets 321 arranged along the second direction, all three second magnets 321 extending along the third direction, and the sides of the three second magnets 321 facing the second vibration assembly 22 are exposed in the cavity of the sound generating device 100; wherein, the first direction, the second direction and the third direction are arranged perpendicularly to each other.

[0089] It should be noted that both the first magnetic circuit component 31 and the second magnetic circuit component 32 of the magnetic circuit system 3 are three-magnetic-circuit structures. The three first magnets 311 of the first magnetic circuit component 31 are arranged along the second direction and extend along the third direction, and the three second magnets 321 of the second magnetic circuit component 32 are arranged along the second direction and extend along the third direction. Optionally, the three first magnets 311 and the three second magnets 321 are arranged in a one-to-one correspondence along the first direction.

[0090] Understandably, the sides of the three first magnets 311 facing the first vibration component 21 are all exposed within the cavity of the sound-generating device 100. This eliminates the need for the magnetic guide plate structure of the first magnetic circuit component 31 in the magnetic circuit system 3, thereby reducing the thickness of the sound-generating device 100 in the Z direction and increasing the volume of the first magnets 311 in the first magnetic circuit component 31, thus improving the BL value. Similarly, the sides of the three second magnets 321 facing the second vibration component 22 are all exposed within the cavity of the sound-generating device 100. This eliminates the need for the magnetic guide plate structure of the second magnetic circuit component 32 in the magnetic circuit system 3, thereby reducing the thickness of the sound-generating device 100 in the Z direction and increasing the volume of the second magnets 321 in the second magnetic circuit component 32, thus improving the BL value.

[0091] In one implementation, such as Figures 3 to 6 , Figure 13 , Figures 15 to 17 As shown, the three first magnets 311 include a first central magnet 3111 and two first side magnets 3113. The two first side magnets 3113 are respectively located on both sides of the first central magnet 3111 along the second direction. The three second magnets 321 include a second central magnet 3211 and two second side magnets 3213. The two second side magnets 3213 are respectively located on both sides of the second central magnet 3211 along the second direction. The first central magnet 3111 and the second central magnet 3211 are arranged opposite to each other along the first direction. The two first side magnets 3113 and the two second side magnets 3213 are arranged in a one-to-one correspondence along the first direction.

[0092] Optionally, such as Figure 6 and Figure 17As shown, the three first magnets 311 and the three second magnets 321 are all magnetized along a first direction. Adjacent first magnets 311 are magnetized in opposite directions, adjacent second magnets 321 are magnetized in opposite directions, and opposite first magnets 311 and second magnets 321 along the first direction are magnetized in opposite directions. This causes the three first magnets 311 of the first magnetic circuit assembly 31 to generate magnetic loops through the two first long axis sides 2121 extending along a third direction of the first voice coil 212, and causes the three second magnets 321 of the second magnetic circuit assembly 32 to generate magnetic loops through the two second long axis sides 2221 extending along a third direction of the second voice coil 222.

[0093] Understandably, the first central magnet 3111, the two first side magnets 3113, the second central magnet 3211, and the two second side magnets 3213 are all magnetized along the first direction. The magnetization directions of the first central magnet 3111 and the two first side magnets 3113 are opposite, the magnetization directions of the second central magnet 3211 and the two second side magnets 3213 are opposite, the magnetization directions of the first central magnet 3111 and the second central magnet 3211 are opposite, and the magnetization directions of the first side magnets 3113 and the second side magnets 3213 that are opposite to each other along the first direction are opposite.

[0094] Of course, in other embodiments, such as Figure 3 and Figure 15 As shown, the first central magnet 3111 and the second central magnet 3211 are both magnetized along the first direction and in opposite directions. The two first side magnets 3113 and the two second side magnets 3213 are both magnetized along the second direction. The magnetic poles of the two first side magnets 3113 near the first central magnet 3111 are the same as the magnetic poles of the first central magnet 3111 facing the first vibration component 21. The magnetic poles of the two second side magnets 3213 near the second central magnet 3211 are the same as the magnetic poles of the second central magnet 3211 facing the second vibration component 22.

[0095] Understandably, this configuration causes the three first magnets 311 of the first magnetic circuit assembly 31 to generate magnetic loops through the two first long axis sides 2121 extending in the third direction through the first voice coil 212, and causes the three second magnets 321 of the second magnetic circuit assembly 32 to generate magnetic loops through the two second long axis sides 2221 extending in the third direction through the second voice coil 222.

[0096] In this embodiment, as Figures 3 to 6 , Figures 15 to 16As shown, three first magnets 311 are arranged at intervals along the second direction, with a first gap 3115 between two adjacent first magnets 311, and the first voice coil 212 is opposite to and spaced apart from the first gap 3115; three second magnets 321 are arranged at intervals along the second direction, with a second gap 3215 between two adjacent second magnets 321, and the second voice coil 222 is opposite to and spaced apart from the second gap 3215.

[0097] In one embodiment, along a first direction, the first voice coil 212 has a first long axis side 2121 disposed opposite to the first gap 3115, the first gap 3115 extending width along a second direction is W1, the first long axis side 2121 extending width along a second direction is W2, 0≤W1<W2.

[0098] In this embodiment, as Figures 2 to 5 , Figures 8 to 11 As shown, the first voice coil 212 can be a flat voice coil. Optionally, the first voice coil 212 is an integral voice coil formed by winding the same wire.

[0099] Understandably, the length of the first voice coil 212 along the first direction is defined as the height of the first voice coil 212, that is, the first major axis side 2121 of the first voice coil 212 has a first height D1 extending along the first direction, and the extension width of the first major axis side 2121 along the second direction is defined as W2. Optionally, the first height D1 of the first major axis side 2121 is less than the extension width W2 of the first major axis side 2121 along the second direction.

[0100] Optionally, the ratio of the first height D1 of the first major axis side 2121 to the extension width W2 of the first major axis side 2121 along the second direction ranges from 0.1 to 1, that is, 0.1 ≤ D1 / W2 ≤ 1. In this embodiment, the ratio of the first height D1 of the first major axis side 2121 to the extension width W2 of the first major axis side 2121 along the second direction (i.e., D1 / W2) is 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, etc., and is not limited here.

[0101] In this embodiment, the first height D1 of the first major axis side 2121 extending along the first direction and the extension width W2 of the first major axis side 2121 along the second direction satisfy: 0.1mm≤D1≤0.5mm, 0.5mm≤W2≤1mm. Optionally, the first height D1 of the first major axis side 2121 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc., and is not limited here. Optionally, the extension width W2 of the first major axis side 2121 along the second direction can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc., and is not limited here.

[0102] In this embodiment, the distance between two adjacent first magnets 311 is defined as the width of the first gap 3115, that is, the extension width of the first gap 3115 along the second direction is W1. By setting the width W1 of the first gap 3115 to be greater than or equal to 0 and less than the extension width W2 of the first long axis side 2121 of the first voice coil 212 along the second direction, the first voice coil 212 and the first gap 3115 are opposite to each other and spaced apart.

[0103] Understandably, this configuration ensures that the three first magnets 311 of the first magnetic circuit assembly 31 each generate magnetic loops passing through the two first long axis sides 2121 extending along the third direction of the first voice coil 212, while also reducing the dimensions of the sound-generating device 100 along the first and second directions, achieving a thinner and smaller design. Optionally, the width W1 of the first gap 3115 is set to be greater than or equal to 0.05 mm and less than the extension width W2 of the first long axis side 2121 of the first voice coil 212 along the second direction.

[0104] In this embodiment, the first voice coil 212 is a flat voice coil, and the first voice coil 212 has two first long axis sides 2121 extending along a third direction. Both first long axis sides 2121 are opposite to and spaced apart from the first gap 3115.

[0105] In one embodiment, along the first direction, the second voice coil 222 has a second long axis side 2221 disposed opposite to the second gap 3215, the second gap 2221 extending width along the second direction is W3, the second long axis side 2221 extending width along the second direction is W4, 0≤W3<W4.

[0106] In this embodiment, as Figures 2 to 5 , Figures 8 to 11 As shown, the second voice coil 222 can be a flat voice coil. Alternatively, the second voice coil 222 can be a one-piece voice coil formed by winding the same wire.

[0107] Understandably, the length of the second voice coil 222 along the first direction is defined as the height of the second voice coil 222, that is, the second major axis side 2221 of the second voice coil 222 has a second height D2 extending along the first direction, and the extension width of the second major axis side 2221 along the second direction is defined as W4. Optionally, the second height D2 of the second major axis side 2221 is less than the extension width W4 of the second major axis side 2221 along the second direction.

[0108] Optionally, the ratio of the second height D2 of the second major axis side 2221 to the extension width W4 of the second major axis side 2221 along the second direction ranges from 0.1 to 1, that is, 0.1 ≤ D2 / W4 ≤ 1. In this embodiment, the ratio of the second height D2 of the second major axis side 2221 to the extension width W4 of the second major axis side 2221 along the second direction (that is, D1 / W2) is 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, etc., and is not limited here.

[0109] In this embodiment, the second height D2 of the second major axis side 2221 extending along the first direction and the extension width W4 of the second major axis side 2221 extending along the second direction satisfy: 0.1mm≤D2≤0.5mm, 0.5mm≤W4≤1mm. Optionally, the second height D2 of the second major axis side 2221 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc., and is not limited here. Optionally, the extension width W4 of the second major axis side 2221 extending along the second direction can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc., and is not limited here.

[0110] In this embodiment, the distance between two adjacent second magnets 321 is defined as the width of the second gap 3215, that is, the extension width of the second gap 2221 along the second direction is W3. By setting the width W3 of the second gap 3215 to be greater than or equal to 0 and less than the extension width W4 of the second long axis side 2221 of the second voice coil 222 along the second direction, the second voice coil 222 and the second gap 3215 are opposite to each other and spaced apart.

[0111] Understandably, this configuration ensures that the three second magnets 321 of the second magnetic circuit assembly 32 each generate magnetic loops passing through the two second long axis sides 2221 extending along the third direction of the second voice coil 222, while also reducing the dimensions of the sound-generating device 100 along the first and second directions, achieving a thinner and smaller design. Optionally, the width W3 of the second gap 3215 is set to be greater than or equal to 0.05 mm and less than the extension width W4 of the second long axis side 2221 of the second voice coil 222 along the second direction.

[0112] In one implementation, such as Figures 3 to 6 , Figure 8 , Figures 10 to 12 As shown, the first voice coil 212 has two first long axis sides 2121 extending along a third direction, both of which are opposite to and spaced apart from the first gap 3115; the second voice coil 222 has two second long axis sides 2221 extending along a third direction, both of which are opposite to and spaced apart from the second gap 3215.

[0113] Understandable, such as Figures 3 to 6 , Figure 8 , Figures 10 to 12 As shown, the first voice coil 212 is positioned opposite and spaced apart from the first magnetic circuit assembly 31, and the second voice coil 222 is positioned opposite and spaced apart from the second magnetic circuit assembly 32. Specifically, the width of the two first major axis edges 2121 of the first voice coil 212 extending along the second direction is greater than the width of their corresponding first gaps 3115, and the width of the two second major axis edges 2221 of the second voice coil 222 extending along the second direction is greater than the width of their corresponding second gaps 3215. Therefore, the first magnetic field generated by the first magnetic circuit assembly 31 acts on the first voice coil 212 to drive it to vibrate along the first direction, and the second magnetic field generated by the second magnetic circuit assembly 32 acts on the second voice coil 222 to drive it to vibrate along the first direction.

[0114] Optionally, the three first magnets 311 of the first magnetic circuit assembly 31 and the three second magnets 321 of the second magnetic circuit assembly 32 are symmetrically arranged with respect to the intermediate horizontal plane.

[0115] In one embodiment, the first central magnet 3111 is provided with a first protrusion 3112 extending toward the first vibrating assembly 21; wherein the projection of the first protrusion 3112 along a first direction is located inside the first voice coil 212; and / or, the height of the first protrusion 3112 along the first direction is less than or equal to 0.2 mm.

[0116] In this embodiment, as Figures 3 to 6 As shown, a first protrusion 3112 is formed by protruding from the center of the first central magnet 3111 toward the first vibration component 21, so that the projection of the first protrusion 3112 along the first direction is located inside the first voice coil 212, thereby ensuring that the first protrusion 3112 does not affect or interfere with the vibration of the first voice coil 212, while increasing the volume of the first central magnet 3111, thereby increasing the magnetic field strength.

[0117] Optionally, the height of the first protrusion 3112 along the first direction is less than or equal to 0.2 mm. This arrangement not only enhances the magnetic force of the magnet and improves the acoustic performance of the sound-generating device 100, but also meets the requirements for a thinner and lighter design of the sound-generating device 100.

[0118] Optionally, along the first direction, the recess depth of the first groove 2114 is H1, and the extension height of the first protrusion 3112 is H2, where H1 ≤ H2. Thus, while meeting the requirements of a thin design, the volume of the magnetic circuit system 3 can be maximized, increasing the product's BL value and thereby improving the sound-generating effect of the sound-generating device 100.

[0119] In one embodiment, the second central magnet 3211 is provided with a second protrusion 3212 extending toward the second vibration assembly 22; wherein the projection of the second protrusion 3212 along the first direction is located inside the second voice coil 222; and / or, the height of the second protrusion 3212 along the first direction is less than or equal to 0.2 mm.

[0120] In this embodiment, as Figures 3 to 6 As shown, a second protrusion 3212 is formed by protruding from the center of the second central magnet 3211 toward the second vibration assembly 22, such that the projection of the second protrusion 3212 along the first direction is located inside the second voice coil 222, thereby ensuring that the second protrusion 3212 does not affect or interfere with the vibration of the second voice coil 222, while increasing the volume of the second central magnet 3211, thereby increasing the magnetic field strength.

[0121] Optionally, the height of the second protrusion 3212 along the first direction is less than or equal to 0.2 mm. This arrangement not only enhances the magnetic force of the magnet and improves the acoustic performance of the sound-generating device 100, but also meets the requirements for a thinner and lighter design of the sound-generating device 100.

[0122] Optionally, along the first direction, the recess depth of the second groove 2214 is H3, and the extension height of the second protrusion 3212 is H4, where H3 ≤ H4. Thus, while meeting the requirements of a thin design, the volume of the magnetic circuit system 3 can be maximized, increasing the product's BL value and thereby improving the sound-generating effect of the sound-generating device 100.

[0123] In one embodiment, at least one of the first magnetic circuit assembly 31 and the second magnetic circuit assembly 32 is formed as a Hellbeck array, with the magnetic field reinforcement side of the Hellbeck array located on the side closer to the vibration system 2.

[0124] In this embodiment, by setting the first magnetic circuit component 31 and / or the second magnetic circuit component 32 as a Hellbeck array, the magnetic field strengthening side of the Hellbeck array is located on the side of the first magnetic circuit component 31 and / or the second magnetic circuit component 32 closer to the vibration system 2. In this way, the magnetic field strength can be further enhanced by the Hellbeck array, thereby increasing the BL value.

[0125] Understandably, the plurality of first magnets 311 of the first magnetic circuit assembly 31 and / or the plurality of second magnets 321 of the second magnetic circuit assembly 32 are formed as a Heilbeck array. Optionally, the plurality of first magnets 311 may include five, and the plurality of second magnets 321 may include five.

[0126] In one embodiment, the first magnetic circuit assembly 31 includes five first magnets 311, and the second magnetic circuit assembly 32 includes five second magnets 321.

[0127] In this embodiment, as Figures 8 to 11As shown, both the first magnetic circuit assembly 31 and the second magnetic circuit assembly 32 of the magnetic circuit system 3 are five-magnetic-circuit structures. The five first magnets 311 of the first magnetic circuit assembly 31 are arranged along a second direction and extend along a third direction, while the five second magnets 321 of the second magnetic circuit assembly 32 are arranged along the second direction and extend along a third direction. Optionally, the five first magnets 311 and the five second magnets 321 are arranged in a one-to-one correspondence along a first direction.

[0128] Optionally, the first magnetic circuit assembly 31 includes five first magnets 311 arranged along the second direction, all five first magnets 311 extending along the third direction, and the side of each of the five first magnets 311 facing the first vibration assembly 21 is exposed in the cavity of the sound-generating device 100, and the five first magnets 311 are formed as a Heilbeck array; the second magnetic circuit assembly 32 includes five second magnets 321 arranged along the second direction, all five second magnets 321 extending along the third direction, and the side of each of the five second magnets 321 facing the second vibration assembly 22 is exposed in the cavity of the sound-generating device 100, and the five first magnets 311 are formed as a Heilbeck array; wherein the first direction, the second direction and the third direction are arranged perpendicularly to each other.

[0129] Understandably, the sides of the five first magnets 311 facing the first vibration component 21 are all exposed within the cavity of the sound-generating device 100. This eliminates the need for the magnetic guide plate structure of the first magnetic circuit component 31 in the magnetic circuit system 3, thereby reducing the thickness of the sound-generating device 100 in the Z direction and increasing the volume of the first magnets 311 in the first magnetic circuit component 31, thus improving the BL value. Similarly, the sides of the five second magnets 321 facing the second vibration component 22 are all exposed within the cavity of the sound-generating device 100. This eliminates the need for the magnetic guide plate structure of the second magnetic circuit component 32 in the magnetic circuit system 3, thereby reducing the thickness of the sound-generating device 100 in the Z direction and increasing the volume of the second magnets 321 in the second magnetic circuit component 32, thus improving the BL value.

[0130] In one implementation, such as Figures 8 to 11 As shown, the five first magnets 311 include a first central magnet 3111, two first common magnets 3114, and two first side magnets 3113. The two first common magnets 3114 are located on both sides of the first central magnet 3111 along the second direction, and the two first side magnets 3113 are located on the side of each first common magnet 3114 facing away from the first central magnet 3111. The five second magnets 321 include a second central magnet 3211, two second common magnets 3214, and two second side magnets 3213. The two second common magnets 3214 are located on both sides of the second central magnet 3211 along the second direction, and the two second side magnets 3213 are located on the side of each second common magnet 3214 facing away from the second central magnet 3211.

[0131] Optionally, such as Figure 8 and Figure 11 As shown, the first central magnet 3111 and the second central magnet 3211 are both magnetized along the first direction and in opposite directions. The two first side magnets 3113 and the two second side magnets 3213 are both magnetized along the first direction, and the magnetization directions of the two first side magnets 3113 are opposite to those of the first central magnet 3111. The magnetization directions of the two second side magnets 3213 are also opposite to those of the second central magnet 3211. The magnetization directions of the first side magnets 3113 and the second side magnets 3213 that are opposite to each other along the first direction are also opposite. The two first shared magnets 3114 and the two second shared magnets 3214 are both magnetized along the second direction. The magnetic poles of the two first shared magnets 3114 near the first central magnet 3111 are the same as the magnetic poles of the first central magnet 3111 facing the first vibration component 21. The magnetic poles of the two second shared magnets 3214 near the second central magnet 3211 are the same as the magnetic poles of the second central magnet 3211 facing the second vibration component 22.

[0132] Understandably, this arrangement causes the five first magnets 311 of the first magnetic circuit assembly 31 to form a Hellbeck array, and the magnetic field strengthening side of the Hellbeck array formed by the five first magnets 311 is located on the side closer to the first vibration assembly 21, thus generating magnetic loops that pass through the first voice coil 212 and extend along the third direction along the second long axis 2121 respectively; and causes the five second magnets 321 of the second magnetic circuit assembly 32 to form a Hellbeck array, and the magnetic field strengthening side of the Hellbeck array formed by the five second magnets 321 is located on the side closer to the second vibration assembly 22, thus generating magnetic loops that pass through the second voice coil 222 and extend along the third direction along the second long axis 2221 respectively, increasing the magnetic field strength acting on the first voice coil 212 and the second voice coil 222, thereby improving the driving force of the first voice coil 212 and the second voice coil 222 and improving the high-frequency performance of the sound-generating device 100.

[0133] In this embodiment, both the first voice coil 212 and the second voice coil 222 are flat voice coils. Optionally, the two first long axis edges 2121 of the first voice coil 212 extending in a third direction are respectively opposite to and spaced apart from the two first common magnets 3114, and the two second long axis edges 2221 of the second voice coil 222 extending in a third direction are respectively opposite to and spaced apart from the two second common magnets 3214.

[0134] Understandable, such as Figures 8 to 11As shown, the five first magnets 311 of the first magnetic circuit assembly 31 are arranged close together along the second direction. Optionally, the five first magnets 311 are bonded together with adhesive and arranged along the second direction. This arrangement ensures that the five first magnets 311 of the first magnetic circuit assembly 31 each generate a magnetic loop passing through the two first long axis sides 2121 extending along the third direction of the first voice coil 212, and also reduces the size of the sound-generating device 100 along the first and second directions, achieving a thinner and smaller design.

[0135] Similarly, the five second magnets 321 of the second magnetic circuit assembly 32 are arranged close together along the second direction. Optionally, the five second magnets 321 are bonded together with adhesive and arranged along the second direction. This arrangement ensures that the five second magnets 321 of the second magnetic circuit assembly 32 each generate a magnetic loop passing through the two second long axis sides 2221 extending along the third direction of the second voice coil 222, and also reduces the size of the sound-generating device 100 along the first and second directions, achieving a thinner and smaller design.

[0136] Of course, in other embodiments, a first gap 3115 may also be provided between two adjacent first magnets 311 among the five first magnets 311, and a connector may be provided within the first gap 3115 to connect the five first magnets 311. This is not limited here. It is understood that in order to achieve a thin and miniaturized design, the width of the first gap 3115 may be set to be small, which is not limited here.

[0137] Similarly, a second gap 3215 can also be provided between two adjacent second magnets 321 among the five second magnets 321, and a connector can be provided within the second gap 3215 to connect the five second magnets 321. This is not limited here. Understandably, in order to achieve a thinner and smaller design, the width of the second gap 3215 can be set to be smaller, which is not limited here.

[0138] Optionally, the five first magnets 311 of the first magnetic circuit assembly 31 and the five second magnets 321 of the second magnetic circuit assembly 32 are arranged symmetrically with respect to the intermediate horizontal plane.

[0139] In one embodiment, the first central magnet 3111 is provided with a first protrusion 3112 extending toward the first vibrating assembly 21; wherein the projection of the first protrusion 3112 along a first direction is located inside the first voice coil 212; and / or, the height of the first protrusion 3112 along the first direction is less than or equal to 0.2 mm.

[0140] In this embodiment, as Figures 8 to 11As shown, a first protrusion 3112 is formed by protruding from the center of the first central magnet 3111 toward the first vibration component 21, so that the projection of the first protrusion 3112 along the first direction is located inside the first voice coil 212, thereby ensuring that the first protrusion 3112 does not affect or interfere with the vibration of the first voice coil 212, while increasing the volume of the first central magnet 3111, thereby increasing the magnetic field strength.

[0141] Optionally, the height of the first protrusion 3112 along the first direction is less than or equal to 0.2 mm. This arrangement not only enhances the magnetic force of the magnet and improves the acoustic performance of the sound-generating device 100, but also meets the requirements for the thin design of the sound-generating device 100.

[0142] Optionally, along the first direction, the recess depth of the first groove 2114 is H1, and the extension height of the first protrusion 3112 is H2, where H1 ≤ H2. Thus, while meeting the requirements of a thin design, the volume of the magnetic circuit system 3 can be maximized, increasing the product's BL value and thereby improving the sound-generating effect of the sound-generating device 100.

[0143] In one embodiment, the second central magnet 3211 is provided with a second protrusion 3212 extending toward the second vibration assembly 22; wherein the projection of the second protrusion 3212 along the first direction is located inside the second voice coil 222; and / or, the height of the second protrusion 3212 along the first direction is less than or equal to 0.2 mm.

[0144] In this embodiment, as Figures 8 to 11 As shown, a second protrusion 3212 is formed by protruding from the center of the second central magnet 3211 toward the second vibration assembly 22, such that the projection of the second protrusion 3212 along the first direction is located inside the second voice coil 222, thereby ensuring that the second protrusion 3212 does not affect or interfere with the vibration of the second voice coil 222, while increasing the volume of the second central magnet 3211, thereby increasing the magnetic field strength.

[0145] Optionally, the height of the second protrusion 3212 along the first direction is less than or equal to 0.2 mm. This arrangement not only enhances the magnetic force of the magnet and improves the acoustic performance of the sound-generating device 100, but also meets the requirements for a thinner design of the sound-generating device 100.

[0146] Optionally, along the first direction, the recess depth of the second groove 2214 is H3, and the extension height of the second protrusion 3212 is H4, where H3 ≤ H4. Thus, while meeting the requirements of a thin design, the volume of the magnetic circuit system 3 can be maximized, increasing the product's BL value and thereby improving the sound-generating effect of the sound-generating device 100.

[0147] In one embodiment, the sound outlet 15 is disposed on one side of the housing 1 along the second direction and is directly opposite to and connected to the front sound cavity 16, the second direction being perpendicular to the first direction; wherein, the distance along the first direction on the side of the front sound cavity 16 away from the sound outlet 15 is smaller than the distance along the first direction on the side of the front sound cavity 16 close to the sound outlet 15.

[0148] In this embodiment, as Figure 15 and Figure 16 As shown, by setting the distance along the first direction of the side of the front acoustic cavity 16 close to the sound outlet 15 to be greater than the distance along the first direction of the side of the front acoustic cavity 16 away from the sound outlet 15, when the vibration system 2 vibrates along the first direction, the sound waves radiated into the front acoustic cavity 16 can be smoothly radiated out toward the sound outlet 15 along the second direction, ensuring that the sound wave airflow can be smoothly radiated out from the sound outlet 15, improving the smoothness of sound output, thereby improving the sound output effect of the sound generating device 100.

[0149] Optionally, the distance between the first housing 12 and the second housing 13 of the outer casing 1 along the first direction is the same from the side near the sound outlet 15 to the side away from the sound outlet 15. In this embodiment, the length of the vertical portion 132 of the intermediate support member 13 of the outer casing 1 along the first direction gradually increases from the side away from the sound outlet 15 to the side near the sound outlet 15.

[0150] Understandably, the distance between the plane containing the first vibrating plate 2113 of the first vibration assembly 21 and the plane containing the second vibrating plate 2213 of the second vibration assembly 22 along the first direction gradually increases from the side away from the sound outlet 15 to the side closer to the sound outlet 15. In this embodiment, as... Figures 14 to 16 As shown, the distance between the plane of the first vibrating plate 2113 of the first vibration assembly 21 and the first magnetic circuit assembly 31 is the same from the side closer to the sound outlet 15 to the side farther from the sound outlet 15. The distance between the plane of the second vibrating plate 2213 of the second vibration assembly 22 and the second magnetic circuit assembly 32 is the same from the side closer to the sound outlet 15 to the side farther from the sound outlet 15.

[0151] In one embodiment, the first magnetic circuit assembly 31 includes a plurality of first magnets 311 arranged along a second direction, each of the plurality of first magnets 311 extending along a third direction, and the side of each of the plurality of first magnets 311 facing the first vibration assembly 21 is exposed in the cavity of the sound generating device 100; the second magnetic circuit assembly 32 includes a plurality of second magnets 321 arranged along the second direction, each of the plurality of second magnets 321 extending along a third direction, and the side of each of the plurality of second magnets 321 facing the second vibration assembly 22 is exposed in the cavity of the sound generating device 100; wherein, the plurality of first magnets 311 and the plurality of second magnets 321 are arranged in a one-to-one correspondence along the first direction, and the first direction, the second direction and the third direction are arranged perpendicularly to each other.

[0152] In this embodiment, as Figures 2 to 11 , Figures 13 to 17 As shown, the first magnetic circuit assembly 31 includes three or five first magnets 311, and the second magnetic circuit assembly 32 includes three or five magnets. Optionally, the plurality of first magnets 311 and the plurality of second magnets 321 are arranged in a one-to-one correspondence along a first direction.

[0153] Understandably, the sides of the multiple first magnets 311 facing the first vibration component 21 are all exposed within the cavity of the sound-generating device 100. This eliminates the need for the magnetic guide plate structure of the first magnetic circuit component 31 in the magnetic circuit system 3, thereby reducing the thickness of the sound-generating device 100 in the Z direction and increasing the volume of the first magnets 311 in the first magnetic circuit component 31, thus improving the BL value. Similarly, the sides of the multiple second magnets 321 facing the second vibration component 22 are all exposed within the cavity of the sound-generating device 100. This eliminates the need for the magnetic guide plate structure of the second magnetic circuit component 32 in the magnetic circuit system 3, thereby reducing the thickness of the sound-generating device 100 in the Z direction and increasing the volume of the second magnets 321 in the second magnetic circuit component 32, thus improving the BL value.

[0154] In one implementation, such as Figure 15 and Figure 17 As shown, the thickness of the first magnet 311 on the side away from the sound outlet 15 along the first direction is greater than the thickness of the first magnet 311 on the side closer to the sound outlet 15 along the first direction. Understandably, this arrangement ensures that the sound wave airflow in the front acoustic cavity 16 can be smoothly radiated out from the sound outlet 15, improving the smoothness of sound output.

[0155] Optionally, the thickness of the plurality of first magnets 311 gradually decreases along the first direction from away from the sound outlet 15 to near the sound outlet 15. In this embodiment, as... Figure 15 and Figure 17 As shown, the distance between the surface of the plurality of first magnets 311 facing the first vibration component 21 and the surface of the plurality of first magnets 311 facing away from the first vibration component 21 gradually decreases from the direction away from the sound outlet 15 to the direction of approaching the sound outlet 15.

[0156] In one implementation, such as Figure 15 and Figure 17 As shown, the thickness of the second magnet 321 on the side away from the sound outlet 15 along the first direction is greater than the thickness of the second magnet 321 on the side closer to the sound outlet 15 along the first direction. Understandably, this arrangement ensures that the sound wave airflow in the front acoustic cavity 16 can be smoothly radiated out from the sound outlet 15, improving the smoothness of sound output.

[0157] Optionally, the thickness of the plurality of second magnets 321 gradually decreases along the first direction from away from the sound outlet 15 to near the sound outlet 15. In this embodiment, as... Figure 15 and Figure 17As shown, the distance between the surface of the plurality of second magnets 321 facing the second vibration assembly 22 and the surface of the plurality of second magnets 321 facing away from the second vibration assembly 22 gradually decreases from the direction away from the sound outlet 15 to the direction of approaching the sound outlet 15.

[0158] In one embodiment, the first vibration assembly 21 further includes a first centering support 213, which includes a first outer fixing part 2131, a first inner fixing part 2132, and a first spring arm part 2133 connecting the first outer fixing part 2131 and the first inner fixing part 2132. The first outer fixing part 2131 is connected to the outer shell 1, and the first inner fixing part 2132 is connected to one end of the first voice coil 212 facing away from the first diaphragm assembly 211.

[0159] In this embodiment, as Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 , Figure 10 As shown, by using the first centering support 213 to center the first voice coil 212, the first voice coil 212 is prevented from being polarized or oscillating during vibration, thereby improving the operational stability of the first vibration assembly 21.

[0160] In one embodiment, the first voice coil 212 has two first long axis sides 2121 and two first short axis sides 2122 connected end to end, and the first centering support 213 includes two, with the two first centering support 213 respectively corresponding to the two first short axis sides 2122.

[0161] In this embodiment, as Figure 2 , Figure 5 , Figure 7 , Figure 10 As shown, there can be two first centering supports 213, which are respectively located at both ends of the first magnetic circuit assembly 31 along a third direction. This is not limited here. Understandably, this arrangement can effectively utilize space and avoid interference between the first centering supports 213 and the first magnetic circuit assembly 31.

[0162] In one embodiment, the second vibration assembly 22 further includes a second centering support 223. The second centering support 223 includes a second outer fixing part 2231, a second inner fixing part 2232, and a second spring arm part 2233 connecting the second outer fixing part 2231 and the second inner fixing part 2232. The second outer fixing part 2231 is connected to the outer shell 1, and the second inner fixing part 2232 is connected to one end of the second voice coil 222 facing away from the second diaphragm assembly 221.

[0163] In this embodiment, as Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 , Figure 10 As shown, by using the second centering support 223 to center the second voice coil 222, the second voice coil 222 is prevented from being polarized or oscillating during vibration, thereby improving the operational stability of the second vibration assembly 22.

[0164] In one embodiment, the second voice coil 222 has two second long axis sides 2221 and two second short axis sides 2222 connected end to end, and the second centering support 223 includes two, with the two second centering support 223 respectively corresponding to the two second short axis sides 2222.

[0165] In this embodiment, as Figure 2 , Figure 5 , Figure 7 , Figure 10 As shown, there can be two second centering supports 223, which are respectively located at both ends of the second magnetic circuit assembly 32 along a third direction. This is not limited here. Understandably, this arrangement can effectively utilize space and avoid interference between the second centering supports 223 and the second magnetic circuit assembly 32.

[0166] 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.

[0167] In this embodiment, the electronic device also includes a device housing, and the sound-generating device 100 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.

[0168] 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 housing and a magnetic circuit system and a vibration system disposed within the housing; The vibration system vibrates along a first direction. The vibration system includes a first vibration component and a second vibration component that are arranged opposite to each other and spaced apart along the first direction. A front acoustic cavity is formed between the first vibration component and the second vibration component. The outer shell is provided with an outlet hole that communicates with the front acoustic cavity. The magnetic circuit system includes a first magnetic circuit assembly and a second magnetic circuit assembly disposed on opposite sides of the vibration system along the first direction. The first magnetic circuit assembly is located on the side of the first vibration assembly facing away from the second vibration assembly along the first direction, and the second magnetic circuit assembly is located on the side of the second vibration assembly facing away from the first vibration assembly along the first direction. The first vibration component includes a first diaphragm assembly and a first voice coil disposed on the side of the first diaphragm assembly facing the first magnetic circuit assembly. The first voice coil and the first magnetic circuit assembly are opposite to each other and spaced apart along the first direction. A first magnetic field generated by the first magnetic circuit assembly acts on the first voice coil to drive the first voice coil to vibrate along the first direction. The second vibration component includes a second diaphragm assembly and a second voice coil disposed on the side of the second diaphragm assembly facing the second magnetic circuit assembly. The second voice coil and the second magnetic circuit assembly are opposite to each other and spaced apart along the first direction. A second magnetic field generated by the second magnetic circuit assembly acts on the second voice coil to drive the second voice coil to vibrate along the first direction. Wherein, both the first voice coil and the second voice coil are flat voice coils, the first diaphragm assembly is provided with a first groove recessed toward the front acoustic cavity, and the first voice coil is disposed in the first groove, the second diaphragm assembly is provided with a second groove recessed toward the front acoustic cavity, and the second voice coil is disposed in the second groove.

2. The sound-generating device as described in claim 1, characterized in that, The first diaphragm assembly includes a first diaphragm plate and a first diaphragm disposed around the first diaphragm plate. The periphery of the first diaphragm plate is connected to the outer shell. The first voice coil is connected to the first diaphragm plate. The first diaphragm plate is provided with a first groove recessed toward the front acoustic cavity. The first voice coil is disposed in the first groove. The second diaphragm assembly includes a second diaphragm plate and a second diaphragm disposed around the second diaphragm plate. The periphery of the second diaphragm plate is connected to the housing. The second voice coil plate is connected to the second diaphragm plate. The second diaphragm plate is provided with a second groove recessed toward the front acoustic cavity. The second voice coil plate is disposed in the second groove plate.

3. The sound-generating device as described in claim 2, characterized in that, The first diaphragm has a first folded ring, and the second diaphragm has a second folded ring; The first fold ring has a concave direction opposite to that of the second fold ring, and both are concave in a direction away from the front acoustic cavity.

4. The sound-generating device as described in claim 1, characterized in that, The outer shell includes a first shell, an intermediate support member, and a second shell stacked sequentially along the first direction. The first shell, the intermediate support member, and the second shell enclose a receiving cavity. The periphery of the first diaphragm assembly is connected to one end of the first shell and / or the intermediate support member, and the periphery of the second diaphragm assembly is connected to the other end of the second shell and / or the intermediate support member. The first magnetic circuit assembly is disposed inside the first shell, and the second magnetic circuit assembly is disposed inside the second shell. The sound outlet is located on the intermediate support member; or the sound outlet is formed by the first housing, the intermediate support member and the second housing.

5. The sound-generating device as described in claim 4, characterized in that, The periphery of the first diaphragm assembly is sandwiched between one end of the first housing and the intermediate support member, and the periphery of the second diaphragm assembly is sandwiched between the other end of the second housing and the intermediate support member; And / or, the outer casing is made of a metallic material.

6. The sound-generating device as claimed in claim 1, characterized in that, The first magnetic circuit assembly includes a plurality of first magnets arranged along a second direction, the plurality of first magnets extending along a third direction, and the side of the plurality of first magnets facing the first vibration assembly being exposed in the cavity of the sound-generating device. The second magnetic circuit assembly includes a plurality of second magnets arranged along the second direction, the plurality of second magnets extending along the third direction, the side of the plurality of second magnets facing the second vibration assembly being exposed in the cavity of the sound-generating device, and the plurality of first magnets and the plurality of second magnets being arranged in a one-to-one correspondence along the first direction; The first direction, the second direction, and the third direction are arranged perpendicularly to each other.

7. The sound-generating device as described in claim 6, characterized in that, The first magnetic circuit assembly includes three first magnets, and the second magnetic circuit assembly includes three second magnets; Among them, the three first magnets and the three second magnets are all magnetized along the first direction, the magnetization directions of adjacent first magnets are opposite, the magnetization directions of adjacent second magnets are opposite, and the magnetization directions of opposite first magnets and second magnets along the first direction are opposite. Alternatively, the three first magnets include a first central magnet and two first lateral magnets, with the two first lateral magnets located on either side of the first central magnet along the second direction. The three second magnets include a second central magnet and two second lateral magnets, with the two second lateral magnets located on either side of the second central magnet along the second direction. The first central magnet and the second central magnet are arranged opposite to each other along the first direction. The two first lateral magnets and the two second lateral magnets are arranged in a one-to-one correspondence along the first direction. The first central magnet and the second central magnet are both magnetized along the first direction but in opposite directions. The two first lateral magnets and the two second lateral magnets are both magnetized along the second direction. The magnetic poles of the two first lateral magnets near the first central magnet are the same as the magnetic poles of the first central magnet facing the first vibration component. The magnetic poles of the two second lateral magnets near the second central magnet are the same as the magnetic poles of the second central magnet facing the second vibration component.

8. The sound-generating device as claimed in claim 7, characterized in that, The three first magnets include a first central magnet and two first side magnets, the two first side magnets being located on both sides of the first central magnet along the second direction, the first central magnet having a first protrusion extending toward the first vibration assembly; wherein, the projection of the first protrusion along the first direction is located inside the first voice coil; and / or, the height of the first protrusion along the first direction is less than or equal to 0.2 mm; And / or, the three second magnets include a second central magnet and two second side magnets, the two second side magnets being located on both sides of the second central magnet along the second direction, the second central magnet having a second protrusion extending toward the second vibration assembly; wherein, the projection of the second protrusion along the first direction is located inside the second voice coil; and / or, the height of the second protrusion along the first direction is less than or equal to 0.2 mm.

9. The sound-generating device as described in claim 6, characterized in that, The first magnetic circuit assembly includes five first magnets, each of which includes a first central magnet, two first common magnets, and two first side magnets. The two first common magnets are located on both sides of the first central magnet along the second direction, and the two first side magnets are located on the side of each first common magnet facing away from the first central magnet. The second magnetic circuit assembly includes five second magnets, each of which includes a second central magnet, two second common magnets, and two second side magnets. The two second common magnets are located on both sides of the second central magnet along the second direction, and the two second side magnets are located on the side of each second common magnet facing away from the second central magnet. Wherein, the first central magnet and the second central magnet are both magnetized along the first direction and the magnetization directions are opposite; the two first side magnets and the two second side magnets are both magnetized along the first direction, the magnetization directions of the two first side magnets are opposite to the magnetization direction of the first central magnet, the magnetization directions of the two second side magnets are opposite to the magnetization direction of the second central magnet, and the magnetization directions of the first side magnets and the second side magnets opposite to each other along the first direction are opposite; the two first common magnets and the two second common magnets are both magnetized along the second direction; the magnetic poles of the two first common magnets near the first central magnet are the same as the magnetic poles of the first central magnet facing the first vibration component; the magnetic poles of the two second common magnets near the second central magnet are the same as the magnetic poles of the second central magnet facing the second vibration component. And / or, the first central magnet has a first protrusion extending toward the first vibrating assembly; wherein the projection of the first protrusion along the first direction is located inside the first voice coil; and / or, the height of the first protrusion along the first direction is less than or equal to 0.2 mm; And / or, the second central magnet has a second protrusion extending toward the second vibrating assembly; wherein the projection of the second protrusion along the first direction is located inside the second voice coil; and / or, the height of the second protrusion along the first direction is less than or equal to 0.2 mm.

10. The sound-generating device as claimed in claim 6, characterized in that, The thickness of the plurality of first magnets gradually decreases along the first direction from away from the sound outlet to near the sound outlet; And / or, the thickness of the plurality of second magnets along the first direction gradually decreases from the direction away from the sound outlet to the direction closer to the sound outlet.

11. The sound-generating device as claimed in claim 1, characterized in that, The first vibration assembly further includes a first centering support, 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, and the first inner fixing part is connected to the end of the first voice coil facing away from the first diaphragm assembly. The first voice coil has two first long axis sides and two first short axis sides connected end to end. There are two first centering supports, and the two first centering supports are respectively arranged corresponding to the two first short axis sides. And / or, the second vibration assembly further includes a second centering support, the second centering support including a second outer fixing part, a second inner fixing part, and a second elastic arm part connecting the second outer fixing part and the second inner fixing part, the second outer fixing part being connected to the outer shell, and the second inner fixing part being connected to the end of the second voice coil facing away from the second diaphragm assembly; wherein, the second voice coil has two second long axis sides and two second short axis sides connected end to end, and the second centering support includes two, with the two second centering supports respectively corresponding to the two second short axis sides.

12. The sound-generating device according to any one of claims 1 to 11, characterized in that, The outer casing has a middle horizontal plane extending along a second direction, which is perpendicular to the first direction. Along the first direction, the opposite ends of the outer casing are equidistant from the middle horizontal plane. Wherein, the first vibration component and the second vibration component are symmetrically arranged with respect to the intermediate horizontal plane; and / or, the first magnetic circuit component and the second magnetic circuit component are symmetrically arranged with respect to the intermediate horizontal plane.

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.

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