Sound production device and electronic device

Abstract

The application discloses a sound generating device and electronic equipment, and relates to the technical field of electroacoustic transduction. The vibration system of the sound generating device comprises a diaphragm, two voice coils, two first connecting pieces and four second connecting pieces. The two voice coils are arranged at intervals along a first direction. Each voice coil has two first side edges and two second side edges connected in a head-to-tail manner. One end of each first connecting piece is connected with the two first side edges of each voice coil. The other end of each first connecting piece is connected with the diaphragm. One end of each second connecting piece is connected with one second side edge. The other end of each second connecting piece is connected with a shell. The second connecting pieces connect the voice coils and the shell. The magnetic circuit system comprises two magnetic circuit components arranged on the shell. Each magnetic circuit component is provided with a magnetic gap corresponding to one voice coil. Each voice coil is located in one magnetic gap and swings around an axis extending along a second direction under the action of a magnetic force. The sound generating device of the application can greatly increase the amplitude without increasing the height size of the product.

Description

Technical Field

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

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

[0003] Currently, some terminals, especially portable terminals such as smartphones, tablets, and headphones, are developing towards thinner and lighter designs. Their internal space is limited, resulting in very limited installation space for speakers, making it difficult to increase speaker height. Since the speaker's voice coil vibrates perpendicular to the magnet, the maximum amplitude of the product is limited by the height of the voice coil and the magnet. Furthermore, as the amplitude increases, the size of the voice coil within the magnetic gap gradually decreases. At large amplitudes, the voice coil may jump out of the magnetic gap, which is detrimental to driving large-amplitude vibrations of the voice coil. Summary of the Invention

[0004] The main objective of this invention is to provide a sound-generating device and electronic device that addresses the problem of increasing amplitude under the limited height of loudspeakers in the prior art. This invention provides a way to significantly increase the amplitude of the sound-generating device without increasing the product height, while avoiding split vibrations of the dome that affect high-frequency performance, thereby improving sound performance.

[0005] To achieve the above objectives, the present invention provides a sound-generating device, the sound-generating device comprising: shell; A vibration system comprising a diaphragm, two voice coils, two first connectors, and four second connectors. The periphery of the diaphragm is connected to the outer shell. The two voice coils are spaced apart along a first direction, and each voice coil has two first sides and two second sides connected end-to-end. One end of each first connector is connected to the two first sides of each voice coil, and the other end of each first connector is connected to the diaphragm. One end of each second connector is connected to a second side, and the other end of each second connector is connected to the outer shell. The second connectors connect the voice coils and the outer shell. A magnetic circuit system is disposed on the housing and is opposite to and spaced from the diaphragm. The magnetic circuit system includes two magnetic circuit components spaced apart along a first direction. Each magnetic circuit component has a magnetic gap corresponding to a voice coil. Each voice coil is located in a magnetic gap and swings around an axis extending along a second direction under the action of magnetic force. The first direction and the second direction are perpendicular to each other.

[0006] In one embodiment, the sound-generating device is rectangular, having a length along the first direction and a width along the second direction, wherein the ratio of the length to the width is greater than or equal to 2:1.

[0007] In one embodiment, the first side extends along the second direction, and the second side extends along the first direction; The length of the first side is greater than the length of the second side.

[0008] In one embodiment, each of the first connectors includes two first fixing portions extending along the second direction and at least one second fixing portion extending along the first direction. At least a portion of the two first fixing portions is connected to the two first sides respectively. One end of the second fixing portion is connected to one of the first fixing portions, and the other end of the second fixing portion is connected to the other first fixing portion and extends along the first direction to form an extension portion. The extension portion is located between the two voice coils, and the extension portion and at least a portion of the second fixing portion are connected to the diaphragm.

[0009] In one embodiment, the second fixing part of each first connector is integrally formed with the two first fixing parts; And / or, each of the first fixing portions has a third fixing portion at at least one end along the second direction that is close to and connected to the diaphragm; And / or, each of the first fixing parts protrudes toward the diaphragm in the direction corresponding to the position of the second fixing part and is connected to the second fixing part; And / or, each of the first fixing parts has a first connecting surface connected to the first side, and the second fixing part has a second connecting surface connected to the diaphragm, wherein the first connecting surface and the second connecting surface are located in different planes; And / or, the second fixing part includes a plurality of second fixing parts, the plurality of second fixing parts are spaced apart along the second direction, and each second fixing part is connected to two first fixing parts and extends along the first direction to form the extension part; And / or, the second fixing part is provided with weight reduction holes; And / or, the extension is provided with a reinforcing rib protruding toward the magnetic circuit assembly, and the magnetic circuit assembly is provided with a clearance area corresponding to the reinforcing rib.

[0010] In one embodiment, each of the magnetic circuit components includes a central magnet and a side magnet, the side magnet being located outside the central magnet and spaced apart from the central magnet to form the magnetic gap, the side of the central magnet and the side magnet facing the diaphragm forming the surface of the magnetic circuit component; Each of the magnetic circuit components has two side magnets, and the two side magnets are respectively disposed on opposite sides of the central magnet along the first direction; In each of the magnetic circuit components, the central magnet and the two side magnets are magnetized along the first direction and the magnetization directions are the same, while the magnetization directions of the two central magnets are opposite.

[0011] In one embodiment, the two magnetic circuit assemblies are symmetrically arranged along the second direction, and the width of the side magnet located between the two voice coils in each magnetic circuit assembly along the first direction is greater than or equal to the width of the other side magnet along the first direction. And / or, the current directions within the two first sides of each of the voice coils are opposite.

[0012] In one embodiment, each of the first connectors has an extension extending along the first direction and located between the two voice coils. The extension is connected to the diaphragm. The side of the extension facing away from the diaphragm is provided with a reinforcing rib extending toward a third direction. The side magnet is provided with a clearance area corresponding to the reinforcing rib. The first direction, the second direction and the third direction are arranged perpendicularly to each other. Wherein, the thickness of the reinforcing rib along the third direction is greater than 1.2 times the thickness of the extension along the third direction; And / or, the maximum thickness of the reinforcing rib along the third direction is less than the sum of the thickness of the side magnet along the third direction and the vibration amplitude of the first connector.

[0013] In one embodiment, the vibration system further includes a conductive support plate, which has a first end and a second end connected to each other. The housing has a through hole, the first end extends into the housing through the through hole, and has an inner pad. The lead of the voice coil is connected to the inner pad. The second end has an outer pad for connecting to an external circuit. The housing has a support boss corresponding to the first end, and the first end is supported and connected to the support boss. And / or, the two voice coils are connected in series or in parallel through the conductive support plate. And / or, the diaphragm includes a dome and a folded ring portion surrounding the dome, and both first connectors are connected to the dome; wherein, there are two domes, the two domes are spaced apart along the first direction, the folded ring portion has a hollow hole corresponding to each dome, each dome is connected to the folded ring portion and covers the hollow hole; And / or, the first connector is made of metal or hard plastic; And / or, the material of the second connector is any one of silicone, rubber, cloth, or thin metal sheet.

[0014] In one embodiment, the outer casing includes a first housing and a second housing. The second housing includes a bottom wall and a side wall disposed around the periphery of the bottom wall. The side wall and the bottom wall enclose a cavity. The first housing is connected to the end of the side wall away from the bottom wall. The periphery of the diaphragm is connected to the side of the first housing opposite to the second housing. The magnetic circuit system is disposed on the bottom wall.

[0015] In one embodiment, the sidewall has a clearance notch corresponding to the side magnet of the magnetic circuit system, and the side magnet extends into the clearance notch; And / or, the first housing is welded to or bonded to the second housing; And / or, the end of the second connector away from the voice coil is clamped between the first housing and the second housing; or, the sidewall is provided with a clearance groove for each second connector, and the end of the second connector away from the voice coil is disposed in the clearance groove; And / or, the outer casing is further provided with a vent; wherein, the vent is provided in the second casing and / or the first casing; and / or, the vent is formed by the first casing and the second casing.

[0016] The present invention also proposes an electronic device, which includes the sound-generating device described above.

[0017] The sound-generating device of this invention connects a magnetic circuit system and a vibration system to a housing, using the housing to install, fix, and protect the magnetic circuit system and the vibration system. Simultaneously, the vibration system comprises a diaphragm, two voice coils, two first connectors, and four second connectors. The periphery of the diaphragm is connected to the housing. The two voice coils are spaced apart along a first direction, and each voice coil has two first sides and two second sides connected end-to-end. One end of each first connector is connected to the two first sides of each voice coil, and the other end is connected to the diaphragm. The second connectors connect the voice coils and the housing, with one end of each second connector connected to a second side and the other end connected to the housing. The magnetic circuit system comprises two magnetic circuit components spaced apart along the first direction, with each magnetic circuit component having a magnetic gap corresponding to a voice coil. Each voice coil is located within a magnetic gap and oscillates around an axis extending along a second direction under magnetic force. Thus, the two magnetic circuit components of the magnetic circuit system provide magnetic driving force to the two voice coils respectively. Since the two second sides of each voice coil are connected by the two second connectors… The voice coil is fixed to the outer shell. At this time, the two first sides of each voice coil are driven by the magnetic field of the magnetic circuit assembly. This causes the two first sides of each voice coil to rotate and oscillate around the two second connectors as rotation axes. That is, the voice coil oscillates around the axis extending along the second direction under the action of magnetic force. When each voice coil rotates and oscillates, the rotational motion of the voice coil can be converted into the vertical motion of the end of the first connector through the first connector. This allows the two first connectors to drive the diaphragm to vibrate in the up and down direction. In this way, when the two voice coils oscillate at a small angle, the lever principle of the two first connectors can achieve a large displacement amplitude of the diaphragm. This can significantly increase the amplitude of the sound-producing device without increasing the height of the product, thereby improving the sound performance. Furthermore, by setting two voice coils, the first side of each voice coil is connected to the diaphragm through a first connector, and the two second sides of each voice coil are connected to the outer shell through two second connectors. This improves the support and connection strength of the diaphragm. Moreover, during high-frequency vibration, the two first connectors effectively prevent the diaphragm from generating segmented vibration, thereby improving high-frequency performance. Attached Figure Description

[0018] 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.

[0019] Figure 1 A schematic diagram of the structure of an embodiment of the sound-generating device provided by the present invention; Figure 2A schematic diagram of the structure from another perspective in one embodiment of the sound-generating device provided by the present invention; Figure 3 A cross-sectional schematic diagram along a first direction in one embodiment of the sound-generating device provided by the present invention; Figure 4 This is a partially exploded schematic diagram of an embodiment of the sound-generating device provided by the present invention. Figure 5 An exploded view of an embodiment of the sound-generating device provided by the present invention; Figure 6 A schematic diagram of the structure of the sound-generating device provided by the present invention, with the diaphragm and the first connecting member removed; Figure 7 for Figure 6 A cross-sectional view along the AA direction; Figure 8 for Figure 6 A cross-sectional view along the BB direction; Figure 9 A schematic diagram of the structure of the sound-generating device provided by the present invention, with the diaphragm and the first connecting member removed; Figure 10 for Figure 9 A cross-sectional view along the CC direction; Figure 11 A partially enlarged schematic diagram of an embodiment of the sound-generating device provided by the present invention; Figure 12 This is a schematic diagram of a structure of an embodiment of the vibration system provided by the present invention; Figure 13 This is an exploded view of an embodiment of the vibration system provided by the present invention; Figure 14 This is a schematic diagram of a second housing embodiment provided by the present invention.

[0020] Explanation of icon numbers: 100. Sound-generating device; 1. Outer shell; 11. First shell; 12. Second shell; 121. Bottom wall; 1211. Support boss; 122. Side wall; 1221. Clearance notch; 1222. Clearance groove; 1223. Through hole; 123. Receiving cavity; 2. Magnetic circuit system; 21. Magnetic circuit assembly; 211. Central magnet; 212. Side magnet; 2121. Clearance area; 213. Magnetic gap; 3. Vibration system; 31. Diaphragm; 311. Dome; 312. Folded ring; 313. Hole; 32. 321. Voice coil; 322. First side; 323. Second side; 33. First connector; 331. First fixing part; 3311. First connecting surface; 332. Second fixing part; 3321. Second connecting surface; 3322. Weight reduction hole; 333. Extension part; 3331. Reinforcing rib; 334. Third fixing part; 34. Second connector; 341. First connecting part; 342. Second connecting part; 35. Conductive support plate; 351. First end; 352. Inner solder pad; 353. Second end; 354. Outer solder pad.

[0021] 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

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0026] This invention proposes a sound-generating device 100, which is applied in an electronic device. It is understood that the electronic device can be a mobile phone, headphones, smart wearable devices, smart glasses, etc., and is not limited thereto.

[0027] Please refer to the reference. Figures 1 to 14 As shown, in this embodiment of the invention, the sound-generating device 100 includes a housing 1, a vibration system 3, and a magnetic circuit system 2. The vibration system 3 includes a diaphragm 31, two voice coils 32, two first connectors 33, and four second connectors 34. The periphery of the diaphragm 31 is connected to the housing 1. The two voice coils 32 are arranged at intervals along a first direction, and each voice coil 32 has two first sides 321 and two second sides 322 connected end to end. One end of each first connector 33 is connected to the two first sides 321 of each voice coil 32, and the other end of each first connector 33 is connected to the diaphragm 31. Next, one end of each second connector 34 is connected to a second side 322, and the other end of each second connector 34 is connected to the housing 1. The second connector 34 connects the voice coil 32 and the housing 1. The magnetic circuit system 2 is disposed on the housing 1 and is opposite to and spaced from the diaphragm 31. The magnetic circuit system 2 includes two magnetic circuit components 21 spaced apart along a first direction. Each magnetic circuit component 21 is provided with a magnetic gap 213 corresponding to a voice coil 32. Each voice coil 32 is located in a magnetic gap 213 and swings around an axis extending along a second direction under the action of magnetic force. The first direction and the second direction are perpendicular to each other.

[0028] 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 should be noted that the magnetic circuit system 2 and the vibration system 3 of the sound-generating device 100 are arranged opposite to each other.

[0029] To better assemble the magnetic circuit system 2 and vibration system 3 of the sound-generating device 100, in one embodiment, as... Figures 1 to 11 , Figure 14As shown, the sound-generating device 100 also includes a housing 1, which has a receiving cavity and an opening communicating with the receiving cavity. The magnetic circuit system 2 is disposed within the receiving cavity of the housing 1. The periphery of the diaphragm 31 of the vibration system 3 is connected to the housing 1 and covers the opening of the housing 1. It can be understood that the diaphragm 31 of the vibration system 3 and the magnetic circuit system 2 are arranged opposite to each other and spaced apart, and a vibration space is formed between the diaphragm 31 and the magnetic circuit system 2. That is, the side of the diaphragm 31 facing the magnetic circuit system 2 and the receiving cavity of the housing 1 enclose the rear cavity of the sound-generating device 100, and the magnetic circuit system 2 is located within the rear cavity.

[0030] It should be noted that the outer casing 1 is used to install, fix, and support components such as the magnetic circuit system 2 and the vibration system 3; that is, the outer casing 1 provides a mounting base for components such as the magnetic circuit system 2 and the vibration system 3. It is understood that the outer casing 1 can be a single integral structure or formed by the combination of multiple separate structures; no limitation is made here. The outer contour of the sound-generating device 100 is the outer contour of the outer casing 1, and the outer contour of the sound-generating device 100 can be circular, square, or polygonal, etc., without limitation.

[0031] Understandably, the sound-generating device 100 is used in electronic devices, meaning that the sound-generating device 100 can be installed in the electronic device through the housing 1. It should be noted that the housing 1 of the sound-generating device 100 can be a separate housing or enclosure structure from the electronic device. In this case, the housing 1 integrates the magnetic circuit system 2 and vibration system 3 of the sound-generating device 100 into a single structure, facilitating assembly and disassembly. Alternatively, the housing 1 of the sound-generating device 100 can be integrally molded with the housing or enclosure structure of the electronic device, which effectively improves structural strength and sealing performance.

[0032] In this embodiment, the outer shell 1 is used to house the fixed vibration system 3 and magnetic circuit system 2, etc., so that the sound generating device 100 can be used as an independent component in electronic devices or sound generating modules, which is not limited here. Of course, in other embodiments, the sound generating device 100 can also be a module structure, in which case the vibration system 3 and magnetic circuit system 2 of the sound generating unit are installed as multiple independent components on the housing of the module structure, which is not limited here.

[0033] Optionally, the sound-generating device 100 is rectangular. In this embodiment, the housing 1 of the sound-generating device 100 is optionally rectangular. Figures 1 to 6 , Figure 9 , Figure 14 As shown, the outer shell 1 has two long sides and two short sides connected end to end. The connection between the long sides and the short sides of the outer shell 1 forms a corner, which is the corner position of the outer shell 1.

[0034] It should be noted that, as Figures 1 to 10As shown, in a specific example of the present invention, the length direction of the sound-generating device 100 (that is, the extension direction of the long side of the outer shell 1) is the first direction, the width direction of the sound-generating device 100 (that is, the extension direction of the short side of the outer shell 1) is the second direction, and the thickness direction of the sound-generating device 100 is the third direction. At this time, the first direction, the second direction and the third direction are perpendicular to each other.

[0035] In this embodiment, the third direction is the thickness direction or Z-direction of the sound-generating device 100, and the diaphragm 31 of the vibration system 3 vibrates along the third direction (e.g., the vertical direction). The first direction is the length direction or X-axis direction of the sound-generating device 100, and the second direction is the width direction or Y-axis direction of the sound-generating device 100, which is not limited here.

[0036] Optionally, the sound-generating device 100 has a length along a first direction and a width along a second direction, the ratio of the length to the width being greater than or equal to 2:1; wherein the first direction and the second direction are perpendicular to each other. In this embodiment, as... Figures 1 to 6 , Figure 9 and Figure 14 As shown, the sound-generating device 100 is rectangular in shape, and the aspect ratio of the sound-generating device 100 is set to be greater than or equal to 2:1. Thus, when the sound-generating device 100 is applied to electronic devices, the formation of standing waves in the electronic device housing can be reduced, and the resonance of the electronic device housing can be reduced, thereby improving the acoustic performance.

[0037] In this embodiment, two voice coils 32 are spaced apart along a first direction, and both voice coils 32 are annular voice coils. Optionally, each voice coil 32 is rectangular. A first side 321 extends along a second direction, and a second side 322 extends along the first direction; wherein the length of the first side 321 is greater than the length of the second side 322.

[0038] In this embodiment, both magnetic circuit components 21 of the magnetic circuit system 2 are provided with magnetic gaps 213. Each voice coil 32 is located within the magnetic gap 213 of a magnetic circuit component 21. The two second sides 322 of each voice coil 32 are respectively connected to the two short sides of the outer shell 1 through two second connectors 34. The two first sides 321 of each voice coil 32 are connected to one end of a first connector 33, and the other end of the first connector 33 is connected to the diaphragm 31. It can be understood that in order to ensure that the second connector 34 provides strong support for the rotational oscillation of the voice coil 32, while having suitable torsional stiffness, the second connector 34 can optionally flexibly connect the voice coil 32 and the outer shell 1; or, the second connector 34 can movably connect the voice coil 32 and the outer shell 1; or, the second connector 34 can rotatably connect the voice coil 32 and the outer shell 1. Of course, the second connector 34 can also be a rigid shaft, which is not limited here.

[0039] Understandably, when current is passed through the two voice coils 32, the two voice coils 32 convert electrical energy into mechanical energy within the two magnetic gaps 213 formed by the two magnetic circuit components 21 of the magnetic circuit system 2, respectively, to drive the two voice coils 32 to vibrate. At this time, since the two second sides 322 of each voice coil 32 are connected to the two short sides of the outer casing 1 by the two second connectors 34, the two second sides 322 of each voice coil 32 can hardly vibrate. The two first sides 321 of each voice coil 32 vibrate under the action of the magnetic field of the magnetic circuit component 21 of the magnetic circuit system 2, and are affected by the two second connectors. The restriction of 34 causes the two first sides 321 of each voice coil 32 to swing about the line connecting the two second connectors 34 as the axis of rotation or the center of rotation. That is, the voice coil 32 swings around the axis extending along the second direction under the action of magnetic force. The first connector 33 connected to the first side 321 of each voice coil 32 converts the rotational swing motion of the two first sides 321 of each voice coil 32 into the vertical motion of the first connector 33 away from the end of the voice coil 32, thereby driving the diaphragm 31 to achieve vertical vibration. That is, the diaphragm 31 vibrates along the third direction under the drive of the two first connectors 33.

[0040] It should be noted that in existing technologies, the voice coil of a loudspeaker vibrates perpendicular to the magnet under the magnetic field of the magnetic circuit system (i.e., vibrates along the thickness direction of the loudspeaker). Therefore, the maximum amplitude of the product is limited by the height of the voice coil and the magnet. Furthermore, as the amplitude increases, the size of the voice coil within the magnetic gap gradually decreases. At large amplitudes, the voice coil may jump out of the magnetic gap, which is detrimental to driving large-amplitude vibrations. As some smart products, such as terminals, are trending towards thinner and lighter designs, their internal space is limited, resulting in very limited installation space for loudspeakers. This makes it difficult to increase the height of the loudspeaker, thus limiting its amplitude and consequently its sound performance. Additionally, for elongated products, a single voice coil at one end means that the voice coil provides no support for the dome of the diaphragm at the other end, resulting in relatively weak stiffness. During high-frequency vibrations, the dome of the diaphragm is prone to segmented vibrations, affecting high-frequency performance.

[0041] In this embodiment, two voice coils 32, two first connectors 33, and four second connectors 34 are provided. The two voice coils 32 are arranged at intervals along a first direction. The two second sides 322 of the two voice coils 32 are connected to the outer shell 1 by the four second connectors 34 respectively. Each first connector 33 connects the two first sides 321 of each voice coil 32 to the diaphragm 31. This allows the two voice coils 32 to support and connect the diaphragm 31 along the first direction through the two first connectors 33. Thus, when the two first sides 321 of each voice coil 32 rotate around the rotation axis formed by the line connecting the two second connectors 34, the rotational motion of each voice coil 32 is converted into vertical motion of the first connector 33 away from the end of the voice coil 32 by each first connector 33, and the motion is transmitted to the diaphragm 31, so that the diaphragm 31 vibrates along a third direction and emits sound. Because the two first connectors 33 amplify the displacement of the ends of the two first connectors 33 away from the voice coil 32 using the lever principle, the two voice coils 32 only need a small swing amplitude to achieve a large displacement of the diaphragm 31 through the two first connectors 33. Moreover, during the movement of the two voice coils 32, they are always located within the two magnetic gaps 213 of the two magnetic circuit components 21 of the magnetic circuit system 2, that is, within the magnetic field region. Thus, without increasing the height of the product, the amplitude of the sound-generating device 100 is significantly increased, thereby improving the sound performance. At the same time, by setting two voice coils 32, the first side 321 of each voice coil 32 is connected to the diaphragm 31 through a first connector 33, and the two second sides 322 of each voice coil 32 are connected to the outer shell 1 through two second connectors 34. This improves the support and connection strength of the diaphragm 31. Furthermore, during high-frequency vibration, the two first connectors 33 effectively prevent the diaphragm 31 from generating segmented vibration, thereby improving high-frequency performance.

[0042] The sound-generating device 100 of the present invention connects the magnetic circuit system 2 and the vibration system 3 to the outer shell 1, thereby using the outer shell 1 to install, fix, and protect the magnetic circuit system 2 and the vibration system 3. Simultaneously, the vibration system 3 is configured as a diaphragm 31, two voice coils 32, two first connectors 33, and four second connectors 34, such that the periphery of the diaphragm 31 is connected to the outer shell 1, the two voice coils 32 are arranged at intervals along a first direction, and each voice coil 32 has two first sides 321 and two second sides 322 connected end-to-end, such that one end of each first connector 33 is connected to the two first sides 321 of each voice coil 32. Next, the other end of each first connector 33 is connected to the diaphragm 31, one end of each second connector 34 is connected to a second side 322, and the other end of each second connector 34 is connected to the housing 1. The magnetic circuit system 2 is configured as two magnetic circuit components 21 spaced apart along the first direction, such that each magnetic circuit component 21 has a magnetic gap 213 corresponding to a voice coil 32, and each voice coil 32 is located within a magnetic gap 213. In this way, the two magnetic circuit components 21 of the magnetic circuit system 2 provide magnetic driving force for the two voice coils 32 respectively. Since the two second sides 322 of each voice coil 32 are connected by two second connectors 31... 4. When connected and fixed to the outer casing 1, the two first sides 321 of each voice coil 32 are driven by the magnetic field of the magnetic circuit assembly 21. This causes the two first sides 321 of each voice coil 32 to rotate and oscillate about the two second connectors 34 as rotation axes. When each voice coil 32 rotates and oscillates, the rotational motion of the voice coil 32 can be converted into the vertical motion of the end of the first connector 33 through the first connector 33. This allows the two first connectors 33 to simultaneously drive the diaphragm 31 to vibrate in the up and down direction. Thus, when the two voice coils 32 oscillate at a small angle, the lever principle of the two first connectors 33 is used to achieve vibration. The large displacement amplitude of the diaphragm 31 allows for a significant increase in the amplitude of the sound-generating device 100 without increasing the product's height, thereby improving sound performance. Furthermore, by setting two voice coils 32, the first side 321 of each voice coil 32 is connected to the diaphragm 31 via a first connector 33, and the two second sides 322 of each voice coil 32 are connected to the outer shell 1 via two second connectors 34. This improves the support and connection strength of the diaphragm 31, and during high-frequency vibration, the two first connectors 33 effectively prevent the diaphragm 31 from generating segmented vibration, thereby improving high-frequency performance.

[0043] In one embodiment, each first connector 33 includes two first fixing portions 331 extending along a second direction and at least one second fixing portion 332 extending along a first direction. At least a portion of the two first fixing portions 331 is connected to two first side edges 321 respectively. One end of the second fixing portion 332 is connected to one first fixing portion 331, and the other end of the second fixing portion 332 is connected to another first fixing portion 331. The second fixing portion 332 extends along the first direction to form an extension portion 333. The extension portion 333 is located between two voice coils 32. The extension portion 333 and at least a portion of the second fixing portion 332 are connected to the diaphragm 31.

[0044] In this embodiment, as Figures 3 to 5 , Figure 12 and Figure 13 As shown, the extension direction of the first fixing part 331 of each first connector 33 is perpendicular to the extension direction of the second fixing part 332. The two first fixing parts 331 of each first connector 33 are respectively connected to the two first sides 321 of each voice coil 32. The second fixing part 332 of each first connector 33 connects the two first fixing parts 331 and is also connected to the diaphragm 31. The second fixing part 332 extends along the first direction to form an extension part 333, such that the extension part 333 is located between the two voice coils 32 and connected to the diaphragm 31. Thus, each voice coil 32 is connected via the first fixing part 331. The first connector 33 is connected to the diaphragm 31. This can be achieved by connecting and reinforcing the two first fixing parts 331 through the second fixing part 332 of the first connector 33, or by connecting the diaphragm 31 through the extension part 333 extending along the first direction. In this way, when the two first sides 321 of each voice coil 32 rotate and swing, each first connector 33 transmits the movement of the voice coil 32 to the second fixing part 332 through the two first fixing parts 331. At this time, the second fixing part 332 converts the rotational swing motion of the voice coil 32 into the vertical movement of the extension part 333 along the third direction, thereby driving the diaphragm 31 to achieve vibration in the third direction.

[0045] Understandably, at least a portion of the first fixing part 331 of the first connector 33 is connected to the first side 321, that is, a portion of the first fixing part 331 is connected to the first side 321 or all of the first fixing part 331 is connected to the first side 321, which is not limited here. At least a portion of the second fixing part 332 of the first connector 33 is connected to the diaphragm 31, that is, a portion of the second fixing part 332 is connected to the diaphragm 31 or all of the second fixing part 332 is connected to the diaphragm 31, which is not limited here.

[0046] In this embodiment, the extension 333 is formed by extending the second fixing part 332 along the first direction; that is, the extension 333 is a part of the second fixing part 332. It is understood that the end of the second fixing part 332 connected to the first fixing part 331 may not be connected to the diaphragm 31, with only the extension 333 connecting to the diaphragm 31. Of course, to improve the connection strength and stability between the voice coil 32 and the diaphragm 31 via the first connector 33, the end of the second fixing part 332 connected to the first fixing part 331 may be connected to the diaphragm 31, and the extension 333 may also be connected to the diaphragm 31; this is not limited here.

[0047] To further enhance the structural strength of the extension 333, in this embodiment, as... Figure 4 , Figure 5 , Figure 12 and Figure 13 As shown, the extension 333 is provided with a reinforcing rib 3331 protruding toward the magnetic circuit assembly 21. It can be understood that the reinforcing rib 3331 may extend in a direction away from the diaphragm 31, and may be a rib or an arc-shaped structure, which is not limited here.

[0048] To prevent the extension 333 of the first connector 33 from interfering with the magnetic circuit assembly 21 when it moves along a third direction under the rotational oscillation of the voice coil 32, in one embodiment, the magnetic circuit assembly 21 is provided with a clearance area 2121 corresponding to the reinforcing rib 3331. It is understood that the clearance area 2121 can be a groove structure provided by the magnetic circuit assembly 21 corresponding to the extension 333; or, the clearance area 2121 can be a through-hole structure provided by the magnetic circuit assembly 21 corresponding to the extension 333, and this is not limited here.

[0049] Optionally, the second fixing part 332 of each first connector 33 and the two first fixing parts 331 are integrally formed. This arrangement can improve the structural strength of the first connector 33.

[0050] In order to further improve the connection strength and stability of the voice coil 32 to the diaphragm 31 through the first connector 33, in one embodiment, each first fixing part 331 is provided with a third fixing part 334 at least one end along the second direction, which is close to and connected to the diaphragm 31.

[0051] In this embodiment, as Figure 4 , Figure 5 , Figure 12 and Figure 13 As shown, the third fixing part 334 is formed by bending the end of the first fixing part 331 toward the diaphragm 31. The surface of the third fixing part 334 that connects with the diaphragm 31 can extend along the first direction or along the second direction, and is not limited here.

[0052] To ensure that the second fixing part 332 can be connected to both the first fixing part 331 and the diaphragm 31, in one embodiment, such as Figure 4 , Figure 5 , Figure 12 and Figure 13 As shown, each first fixing part 331 protrudes toward the diaphragm 31 at the position corresponding to the second fixing part 332 and is connected to the second fixing part 332.

[0053] Understandably, the first fixing part 331 can be a strip-shaped structure extending along the second direction. Of course, in other embodiments, the first fixing part 331 can also be provided as multiple, with each second fixing part 332 connecting two first fixing parts 331 on both sides along the second direction, and the two first fixing parts 331 extending along the second direction.

[0054] Optionally, each first fixing part 331 has a first connecting surface 3311 connected to the first side 321, and the second fixing part 332 has a second connecting surface 3321 connected to the diaphragm 31. The first connecting surface 3311 and the second connecting surface 3321 are located in different planes.

[0055] In this embodiment, as Figure 4 , Figure 5 , Figure 12 and Figure 13 As shown, by setting the first connecting surface 3311 of the first fixing part 331 and the second connecting surface 3321 of the second fixing part 332 on different planes, a certain distance is ensured between the diaphragm 31 and the voice coil 32, so that the diaphragm 31 will not be affected by the rotation and sway of the voice coil 32.

[0056] In one embodiment, each first connector 33 includes a plurality of second fixing portions 332, the plurality of second fixing portions 332 are spaced apart along a second direction, and each second fixing portion 332 is connected to two first fixing portions 331 and extends along a first direction to form an extension portion 333.

[0057] Understandably, by providing multiple second fixing parts 332, the connection strength between the first connector 33 and the diaphragm 31 can be effectively improved. Optionally, the second fixing parts 332 may include two, three, four or more, and this is not limited here.

[0058] In this embodiment, the first connector 33 is a rigid component used to connect the diaphragm 31 and can convert the rotational oscillation motion of the voice coil 32 into the vertical motion of the extension 333 along a third direction. Optionally, the first connector 33 can be made of metal or non-metal. Metal materials can be rigid metal sheets or rigid metal connectors, while non-metal materials include, for example, hard plastics, and are not limited here. Understandably, in order to reduce the weight of the first connector 33, the second fixing part 332 is provided with weight-reducing holes 3322, which are not limited here. Optionally, there are multiple weight-reducing holes 3322, which are spaced apart along the extension direction of the second fixing part 332, and are not limited here.

[0059] In one embodiment, each second connector 34 includes a first connecting portion 341 and a second connecting portion 342 connected to each other. The first connecting portion 341 is connected to the housing 1, and the second connecting portion 342 is connected to a second side 322.

[0060] In this embodiment, as Figures 4 to 6 , Figure 8 , Figure 9 , Figures 11 to 13 As shown, the first connecting portion 341 of each second connector 34 is connected to the housing 1, and the second connecting portion 342 is connected to the second side 322 of the voice coil 32. To ensure that the second connector 34 provides strong support for the rotational oscillation of the voice coil 32 while possessing suitable torsional stiffness, the second connector 34 can be selected from any one of silicone, rubber, cloth, or thin metal sheet. Of course, the second connector 34 can also be made of other flexible materials, which are not limited here.

[0061] Understandably, the first connecting portion 341 and the second connecting portion 342 of the second connector 34 can be connected as a single unit via a bridge portion. The width of the bridge portion along the first direction is smaller than the width of the first connecting portion 341 and the second connecting portion 342 along the first direction, thus giving the second connector 34 suitable torsional stiffness. Optionally, the material of the second connector 34 can be silicone, rubber, cloth, thin metal sheet, or other flexible materials, and is not limited here.

[0062] In this embodiment, the second connecting portion 342 is connected to the side of the second side 322 facing the diaphragm 31; or, the second connecting portion 342 is connected to the side of the second side 322 facing away from the diaphragm 31, which is not limited here. It can be understood that the first connecting portion 341 and the second connecting portion 342 are located in the same plane; or, the first connecting portion 341 and the second connecting portion 342 are located in different planes.

[0063] Optionally, the first connecting portion 341 and the second connecting portion 342 are located on different planes. One end of the bridge portion is connected to the first connecting portion 341, and the other end extends toward a third direction and is connected to the second connecting portion 342. In this embodiment, the two second connecting members 34 connected to each voice coil 32 are symmetrically arranged along the first direction, that is, the two second connecting members 34 connecting the same voice coil 32 are symmetrically arranged along the line connecting the center points of the two first sides 321, which is not limited here.

[0064] In one embodiment, each magnetic circuit assembly 21 includes a central magnet 211 and a side magnet 212, the side magnet 212 being located outside the central magnet 211 and spaced apart from the central magnet 211 to form a magnetic gap 213, the side of the central magnet 211 and the side magnet 212 facing the diaphragm 31 forming the surface of the magnetic circuit assembly 21.

[0065] In this embodiment, as Figures 3 to 11 As shown, the central magnet 211 and the side magnet 212 of each magnetic circuit assembly 21 are exposed in the cavity of the sound-generating device 100, i.e., exposed in the rear cavity, on the side facing the diaphragm 31. It is understood that neither the central magnet 211 nor the side magnet 212 has a washer structure on the side facing the diaphragm 31, which effectively increases the magnet volume of the central magnet 211 and the side magnet 212, and makes it suitable for ultra-thin products, allowing the magnets to be made thin.

[0066] Understandable, such as Figures 3 to 11 As shown, each voice coil 32 is located within the magnetic gap 213 of a magnetic circuit assembly 21, that is, each voice coil 32 is arranged around the central magnet 211 of each magnetic circuit assembly 21 and is located between the central magnet 211 and the side magnet 212.

[0067] It should be noted that the side magnet 212 of each magnetic circuit assembly 21 can be a ring structure, with the ring-shaped side magnet 212 surrounding the outside of the central magnet 211. In this case, the side magnet 212 is a single ring structure. Of course, in other embodiments, each magnetic circuit assembly 21 may include multiple side magnets 212. These multiple side magnets 212 may be connected end to end to form a ring structure and surrounding the outside of the central magnet 211; or, multiple side magnets 212 may be spaced apart and surrounding the outside of the central magnet 211, with gaps between adjacent side magnets 212. This is not limited here.

[0068] In order to reduce the magnetic driving force of the magnetic circuit component 21 of the magnetic circuit system 2 on the second side 322 of each voice coil 32, the side magnet 212 of each magnetic circuit component 21 is only set on the outside of the first side 321 of the voice coil 32, that is, the side magnet 212 is not set on the outside of the second side 322. In this way, the magnetic field strength of the first side 321 of the voice coil 32 can be ensured, and the magnetic driving force on the second side 322 can be reduced. This ensures the structural strength and stability of the second side 322 connected to the outer shell 1 through the second connector 34.

[0069] Optionally, each magnetic circuit assembly 21 has two side magnets 212. In this embodiment, as... Figures 3 to 10 As shown, the two side magnets 212 of each magnetic circuit assembly 21 are respectively disposed on opposite sides of the central magnet 211 along the first direction. It can be understood that the central magnet 211 and the two side magnets 212 of each magnetic circuit assembly 21 extend along the second direction.

[0070] Understandably, the two side magnets 212 are located on the outer sides of the two first sides 321 of each voice coil 32, while no side magnets 212 are provided on the outer sides of the two second sides 322 of the voice coil 32. This reduces the magnetic field driving force on the second sides 322 and provides installation space for the second connector 34. Optionally, the center magnet 211 and the two side magnets 212 both extend along the second direction.

[0071] In this embodiment, as Figure 7 and Figure 10 As shown, the central magnet 211 and the two side magnets 212 of each magnetic circuit assembly 21 are all magnetized along the first direction and in the same direction. Understandably, this ensures that the central magnet 211 and the two side magnets 212 cooperate to drive the magnetic field force and magnetic field strength of the two first sides 321 of the voice coil 32, ensuring that there are sufficient magnetic field lines passing through the two first sides 321, thereby driving the two first sides 321 to rotate and oscillate around the line connecting the two second connectors 34.

[0072] Understandably, the current in the two first sides 321 of each voice coil 32 flows in opposite directions. This causes one first side 321 to move upward while the other moves downward, thus enabling the two first sides 321 to rotate and oscillate around the line connecting the two second connectors 34. This allows the voice coil 32 to achieve a large diaphragm 31 displacement with only a small rotation angle, resulting in a flatter driving force factor curve BLx compared to conventional loudspeakers.

[0073] Optionally, the magnetization directions of the two magnetic circuit components 21 are opposite. In this embodiment, the central magnet 211 and the two side magnets 212 of the two magnetic circuit components 21 are all magnetized along the first direction, and the magnetization direction of the central magnet 211 and the two side magnets 212 of one magnetic circuit component 21 is opposite to the magnetization direction of the central magnet 211 and the two side magnets 212 of the other magnetic circuit component 21. That is, the magnetization directions of the two central magnets 211 are opposite. This arrangement ensures that the two inner first side edges 321 of the two voice coils 32 swing in the same direction, and the two outer first side edges 321 swing in the same direction.

[0074] Optionally, the current direction in the inner first side 321 of one voice coil 32 is the same as the current direction in the inner first side 321 of the other voice coil 32, and the current direction in the outer first side 321 of one voice coil 32 is the same as the current direction in the outer first side 321 of the other voice coil 32. Furthermore, the current directions in the two first sides 321 of each voice coil 32 are opposite.

[0075] In one embodiment, each first connector 33 has an extension 333 extending along a first direction and located between two voice coils 32. The extension 333 is connected to the diaphragm 31. The side of the extension 333 facing away from the diaphragm 31 is provided with a reinforcing rib 3331 extending toward a third direction. The side magnet 212 is provided with a clearance area 2121 corresponding to the reinforcing rib 3331. The first direction, the second direction and the third direction are arranged perpendicularly to each other.

[0076] In this embodiment, as Figures 3 to 6 , Figure 9 As shown, each magnetic circuit assembly 21 has a clearance area 2121 for its side magnet 212 corresponding to the reinforcing rib 3331. This ensures that the extension 333 avoids interference with the side magnet 212 when it moves along a third direction. It can be understood that the clearance area 2121 passes through the side magnet 212 of the magnetic circuit assembly 21 along the third direction and through the side magnet 212 along the first direction, so that the side magnet 212 located on the same side as the extension 333 is divided into multiple parts by the clearance area 2121. This is not limited here.

[0077] Optionally, the thickness of the reinforcing rib 3331 along the third direction is greater than 1.2 times the thickness of the extension 333 along the third direction. Understandably, this arrangement enables the reinforcing rib 3331 to improve the structural strength of the extension 333.

[0078] To ensure that the extension 333 can vibrate smoothly in the third direction, in one embodiment, the maximum thickness of the reinforcing rib 3331 in the third direction is less than the sum of the thickness of the side magnet 212 in the third direction and the vibration amplitude of the first connector 33.

[0079] Optionally, the two magnetic circuit components 21 are symmetrically arranged along the second direction. In one embodiment, as... Figures 4 to 6 , Figure 9 As shown, in each magnetic circuit assembly 21, the width of the side magnet 212 located between the two voice coils 32 along the first direction is greater than or equal to the width of the other side magnet 212 along the first direction. It can be understood that this arrangement can, on the one hand, compensate for the reduced magnetic field strength of the side magnet 212 due to the setting of the avoidance area 2121, and on the other hand, increase the magnetic field driving force of the first side edge 321 of the voice coil 32 located on the side of the extension 333.

[0080] In this embodiment, to further increase the volume of the side magnet 212, the side magnet 212 of each magnetic circuit assembly 21 extends to the inner edge of the outer casing 1. Of course, in other embodiments, clearance notches 1221 can also be provided on the outer casing 1, so that the side magnets 212 extend into the clearance notches 1221 respectively, thereby increasing the magnet volume and improving the magnetic field strength.

[0081] In one embodiment, the vibration system 3 further includes a conductive support 35, which includes a first end 351 and a second end 353 connected to each other. The housing 1 is provided with a through hole 1223. The first end 351 extends into the housing 1 through the through hole 1223 and is provided with an inner pad 352. The lead wire of the voice coil 32 is connected to the inner pad 352. The second end 353 is provided with an outer pad 354, which is used to connect to an external circuit.

[0082] In this embodiment, as Figure 1 , Figure 2 , Figures 4 to 6 , Figure 8 , Figure 9 , Figure 11 As shown, by setting the conductive support piece 35, the two voice coils 32 are connected to the external circuit through the conductive support piece 35. It is understood that the outer casing 1 has a through hole 1223, and the first end 351 of the conductive support piece 35 extends into the outer casing 1 through the through hole 1223 and has an inner pad 352. The leads of the two voice coils 32 are connected to the inner pad 352. The second end 353 of the conductive support piece 35 located on the outside of the outer casing 1 has an outer pad 354 for connecting to the external circuit; this is not limited here.

[0083] Understandably, the first end 351 of the conductive support piece 35 is provided with a conductive portion corresponding to the lead of each voice coil 32, and each conductive portion is provided with an inner pad 352, so that the lead of each voice coil 32 is connected to the inner pad 352 of the conductive portion, which is not limited here. In this embodiment, the first end 351 of the conductive support piece 35 is provided with multiple conductive portions, and optionally, the conductive portions include four.

[0084] Optionally, the outer casing 1 has a support boss 1211 corresponding to the first end 351, and the first end 351 is supported and connected to the support boss 1211. In this embodiment, as shown... Figure 2 , Figure 5 , Figure 6 , Figure 9 , Figure 11 and Figure 14 As shown, the first end 351 of the conductive support piece 35 extending into the housing 1 is provided with a support boss 1211, so that the first end 351 of the conductive support piece 35 extending into the housing 1 is supported and connected to the support boss 1211. This can achieve a stable connection and fixation of the conductive support piece 35, thereby avoiding the risk of the lead wire of the voice coil 32 breaking during the rotation and swinging process after the lead wire of the voice coil 32 is connected to the inner solder pad 352.

[0085] Understandably, the outer casing 1 has a support boss 1211 for each conductive part corresponding to the first end 351, and each conductive part is supported and connected to the support boss 1211. Optionally, there are four support bosses 1211, and the four conductive parts correspond one-to-one with the four support bosses 1211, which is not limited here.

[0086] In this embodiment, the conductive support piece 35 is located on the long side of the outer casing 1, and the lead wire of the voice coil 32 is led out from the second side 322 of the corresponding short side and soldered to the inner pad 352 of the conductive support piece 35. It can be understood that since the vibration displacement of the voice coil 32 is small, the conductive support piece 35 can also be replaced by the lead wire of the voice coil 32, which is not limited here.

[0087] Optionally, the two voice coils 32 are connected in series or in parallel via a conductive support 35. In this embodiment, the two voice coils 32 share the same conductive support 35.

[0088] In one embodiment, the diaphragm 31 includes a dome 311 and a folded ring 312 surrounding the dome 311, and two first connectors 33 are connected to the dome 311.

[0089] In this embodiment, as Figure 1 , Figures 3 to 5 , Figure 12 and Figure 13 As shown, the folded ring 312 of the diaphragm 31 surrounds the dome 311. Optionally, the folded ring 312 of the diaphragm 31 and the dome 311 are integrally formed, such as integrally injection molded or integrally machined, etc., which is not limited here. It can be understood that the folded ring 312 of the diaphragm 31 has an inner ring portion, a folded ring portion connected to the inner ring portion, and an outer fixing portion connected to the folded ring portion. The inner ring portion is connected to the dome 311, and the outer fixing portion of the folded ring 312 is connected to the outer shell 1.

[0090] Understandably, the inner ring portion of the folded ring 312 has a perforated hole 313, and the dome 311 is connected to the inner ring portion and covers the perforated hole 313, thus reducing the weight of the diaphragm 31. The second fixing portion 332 and the extension portion 333 of the first connector 33 are connected to the dome 311. In this embodiment, the folded ring 312 and the dome 311 of the diaphragm 31 can be separate structures, for example, connected by adhesive bonding, which is not limited here.

[0091] Optionally, the dome 311 includes two domes 311, which are spaced apart along the first direction. The folding ring 312 is provided with a hollow hole 313 corresponding to each dome 311. Each dome 311 is connected to the folding ring 312 and covers the hollow hole 313.

[0092] In this embodiment, as Figure 1 , Figures 3 to 5 , Figure 12 and Figure 13 As shown, the diaphragm 31 has a middle portion located between two domes 311 and extending along a second direction, with the two domes 311 arranged symmetrically with respect to the middle portion.

[0093] Understandably, the middle portion has a downwardly concave or upwardly convex structure. The concave or convex structure of the middle portion is similar to the structure of the folded ring portion of the folded ring 312. It should be noted that the middle portion is connected to the folded ring 312, so that the middle portion and the folded ring 312 cooperate to form two inner ring portions and two folded ring portions surrounding the two hollow holes 313. At this time, the outer fixing portion of the folded ring 312 is located outside the middle portion and the folded ring portion and is connected to the outer shell 1, which is not limited here.

[0094] Optionally, the two voice coils 32 are symmetrically arranged with respect to the middle portion, that is, the two voice coils 32 are symmetrically arranged along the second direction. This arrangement allows the two voice coils 32 to support and fix the diaphragm 31 via two first connectors 33, improving the support and connection strength of the diaphragm 31. Furthermore, during high-frequency vibration, the two first connectors 33 effectively prevent the diaphragm 31 from experiencing segmented vibration, thereby improving high-frequency performance. Optionally, the two first connectors 33 are symmetrically arranged with respect to the middle portion, that is, the two first connectors 33 are symmetrically arranged along the second direction.

[0095] Optionally, the two magnetic circuit components 21 are arranged symmetrically with respect to the middle part, that is, the two magnetic circuit components 21 are arranged symmetrically along the second direction. This arrangement enables synchronous driving of the two voice coils 32 and makes the vibration frequencies of the two voice coils 32 the same.

[0096] In one embodiment, the outer shell 1 includes a first shell 11 and a second shell 12. The second shell 12 includes a bottom wall 121 and a side wall 122 disposed around the bottom wall 121. The side wall 122 and the bottom wall 121 enclose a cavity 123. The first shell 11 is connected to the end of the side wall 122 away from the bottom wall 121. The periphery of the diaphragm 31 is connected to the side of the first shell 11 facing away from the second shell 12. The magnetic circuit system 2 is disposed on the bottom wall 121.

[0097] In this embodiment, as Figures 1 to 11 , Figure 14 As shown, by setting the outer shell 1 as a split structure, the assembly of the magnetic circuit system 2 and the vibration system 3 can be facilitated. It can be understood that the first shell 11 of the outer shell 1 can be selected as a square frame or frame structure, and the second shell 12 is set as a bottom wall 121 and a side wall 122 provided around the bottom wall 121, so that the side wall 122 and the bottom wall 121 enclose a cavity 123, and the first shell 11 is connected to the end of the side wall 122 away from the bottom wall 121, and the first shell 11 forms an opening communicating with the cavity 123.

[0098] Understandably, both magnetic circuit components 21 of the magnetic circuit system 2 are disposed within the accommodating cavity 123 and connected to the bottom wall 121. The periphery of the diaphragm 31 is connected to the side of the first housing 11 facing away from the second housing 12 to cover the opening. Optionally, the first housing 11 and the second housing 12 are welded or bonded together. In this embodiment, the first housing 11 and the second housing 12 are welded together, which improves the connection strength.

[0099] In one embodiment, the sidewall 122 is provided with a clearance notch 1221 corresponding to the side magnet 212 of the magnetic circuit system 2, and the side magnet 212 extends into the clearance notch 1221.

[0100] In this embodiment, as Figure 9 and Figure 10 As shown, by providing an clearance notch 1221 on the side wall 122 of the second housing 12, the side magnet 212 extends into the clearance notch 1221, thereby increasing the magnet volume and enhancing the magnetic field strength.

[0101] Understandably, the end of the second connector 34 furthest from the voice coil 32 is clamped between the first housing 11 and the second housing 12. Of course, in other embodiments, such as... Figure 1 , Figure 2 , Figures 4 to 6 , Figure 8 , Figure 9 and Figure 14 As shown, the side wall 122 is provided with a relief groove 1222 for each second connector 34. The end of the second connector 34 away from the voice coil 32 is located in the relief groove 1222, which is not limited here.

[0102] In one embodiment, the outer casing 1 is also provided with a vent hole. It is understood that the vent hole connects to the rear cavity, thereby realizing the venting of the rear cavity. At the same time, when the sound generating device 100 is assembled in the module housing or equipment housing, the rear cavity of the sound generating device 100 is connected to the internal cavity of the module housing or equipment housing through the vent hole, thereby realizing the venting while increasing the volume of the rear cavity and improving the acoustic performance.

[0103] Optionally, the vent is located in the second housing 12 and / or the first housing 11. Of course, in other embodiments, the vent is formed by the enclosure of the first housing 11 and the second housing 12, which is not limited here.

[0104] 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.

[0105] In one embodiment, the electronic device further includes a device housing and a flexible circuit board. The sound-generating device 100 is disposed inside the device housing. One end of the flexible circuit board is electrically connected to the sound-generating device 100, and the other end of the flexible circuit board is used to connect to an external power source.

[0106] Understandably, the flexible circuit board is used to connect and conduct external circuitry to the sound-generating device 100. The flexible circuit board has inner and outer pads; the inner pads of the flexible circuit board are connected and conduction-conducting with the sound-generating device 100, and the outer pads of the flexible circuit board are used to connect with external terminals.

[0107] In this embodiment, the device housing has a cavity, the sound-generating device 100 is disposed within the cavity of the device housing, and at least one end of the flexible circuit board connected to the sound-generating device 100 is located within the cavity of the device housing. Of course, in other embodiments, the flexible circuit board may also be entirely disposed within the cavity of the device housing, and this is not limited here.

[0108] It is understood that electronic devices can be headphones, mobile phones, computers, tablets, portable mobile electronic products, or smart wearable devices such as watches, VR, and AR, etc., and are not limited here. In electronic devices, the sound-generating device 100 can be assembled into the housing of the electronic device in a modular manner or as a single unit. The electronic device can be a mobile phone, MP3 player, MP4 player, tablet computer, laptop computer, headphones, wearable devices, etc., and will not be listed here.

[0109] 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: shell; A vibration system comprising a diaphragm, two voice coils, two first connectors, and four second connectors. The periphery of the diaphragm is connected to the outer shell. The two voice coils are spaced apart along a first direction, and each voice coil has two first sides and two second sides connected end-to-end. One end of each first connector is connected to the two first sides of each voice coil, and the other end of each first connector is connected to the diaphragm. One end of each second connector is connected to a second side, and the other end of each second connector is connected to the outer shell. The second connectors connect the voice coils and the outer shell. A magnetic circuit system is disposed on the housing and is opposite to and spaced from the diaphragm. The magnetic circuit system includes two magnetic circuit components spaced apart along a first direction. Each magnetic circuit component has a magnetic gap corresponding to a voice coil. Each voice coil is located in a magnetic gap and swings around an axis extending along a second direction under the action of magnetic force. The first direction and the second direction are perpendicular to each other.

2. The sound-generating device as described in claim 1, characterized in that, The sound-generating device is rectangular, and has a length along the first direction and a width along the second direction, wherein the ratio of the length to the width is greater than or equal to 2:

1.

3. The sound-generating device as described in claim 1, characterized in that, The first side extends along the second direction, and the second side extends along the first direction; The length of the first side is greater than the length of the second side.

4. The sound-generating device as described in claim 3, characterized in that, Each of the first connectors includes two first fixing portions extending along the second direction and at least one second fixing portion extending along the first direction. At least a portion of the two first fixing portions is connected to the two first sides respectively. One end of the second fixing portion is connected to one of the first fixing portions, and the other end of the second fixing portion is connected to another first fixing portion and extends along the first direction to form an extension. The extension is located between the two voice coils, and the extension and at least a portion of the second fixing portion are connected to the diaphragm.

5. The sound-generating device as described in claim 4, characterized in that, The second fixing part of each of the first connectors is integrally formed with the two first fixing parts; And / or, each of the first fixing portions has a third fixing portion at at least one end along the second direction that is close to and connected to the diaphragm; And / or, each of the first fixing parts protrudes toward the diaphragm in the direction corresponding to the position of the second fixing part and is connected to the second fixing part; And / or, each of the first fixing parts has a first connecting surface connected to the first side, and the second fixing part has a second connecting surface connected to the diaphragm, wherein the first connecting surface and the second connecting surface are located in different planes; And / or, the second fixing part includes a plurality of second fixing parts, the plurality of second fixing parts are spaced apart along the second direction, and each second fixing part is connected to two first fixing parts and extends along the first direction to form the extension part; And / or, the second fixing part is provided with weight reduction holes; And / or, the extension is provided with a reinforcing rib protruding toward the magnetic circuit assembly, and the magnetic circuit assembly is provided with a clearance area corresponding to the reinforcing rib.

6. The sound-generating device as described in claim 3, characterized in that, Each of the magnetic circuit assemblies includes a central magnet and a side magnet, the side magnet being located outside the central magnet and spaced apart from the central magnet to form the magnetic gap, and the side of the central magnet and the side magnet facing the diaphragm forming the surface of the magnetic circuit assembly; Each of the magnetic circuit components has two side magnets, and the two side magnets are respectively disposed on opposite sides of the central magnet along the first direction; In each of the magnetic circuit components, the central magnet and the two side magnets are magnetized along the first direction and the magnetization directions are the same, while the magnetization directions of the two central magnets are opposite.

7. The sound-generating device as described in claim 6, characterized in that, The two magnetic circuit assemblies are symmetrically arranged along the second direction, and the width of the side magnet located between the two voice coils in each magnetic circuit assembly along the first direction is greater than or equal to the width of the other side magnet along the first direction; And / or, the current directions within the two first sides of each of the voice coils are opposite.

8. The sound-generating device as described in claim 6, characterized in that, Each of the first connectors has an extension extending along the first direction and located between the two voice coils. The extension is connected to the diaphragm. The side of the extension facing away from the diaphragm is provided with a reinforcing rib extending toward a third direction. The side magnet is provided with a clearance area corresponding to the reinforcing rib. The first direction, the second direction and the third direction are arranged perpendicularly to each other. Wherein, the thickness of the reinforcing rib along the third direction is greater than 1.2 times the thickness of the extension along the third direction; And / or, the maximum thickness of the reinforcing rib along the third direction is less than the sum of the thickness of the side magnet along the third direction and the vibration amplitude of the first connector.

9. The sound-generating device as claimed in claim 1, characterized in that, The vibration system further includes a conductive support plate, which has a first end and a second end connected to each other. The outer shell has a through hole, through which the first end extends into the outer shell and has an inner solder pad. The lead of the voice coil is connected to the inner solder pad. The second end has an outer solder pad for connecting to external circuitry. The outer shell has a support boss corresponding to the first end, and the first end is supported and connected to the support boss. And / or, the two voice coils are connected in series or in parallel through the conductive support plate. And / or, the diaphragm includes a dome and a folded ring surrounding the dome, and both first connectors are connected to the dome; wherein, there are two domes, the two domes are spaced apart along the first direction, the folded ring has a hollow hole corresponding to each dome, each dome is connected to the folded ring and covers the hollow hole; And / or, the first connector is made of metal or hard plastic; And / or, the material of the second connector is any one of silicone, rubber, cloth, or thin metal sheet.

10. The sound-generating device as described in any one of claims 1 to 9, characterized in that, The outer casing includes a first housing and a second housing. The second housing includes a bottom wall and a side wall disposed around the periphery of the bottom wall. The side wall and the bottom wall enclose a cavity. The first housing is connected to the end of the side wall away from the bottom wall. The periphery of the diaphragm is connected to the side of the first housing opposite to the second housing. The magnetic circuit system is disposed on the bottom wall.

11. The sound-generating device as claimed in claim 10, characterized in that, The sidewall is provided with a clearance notch corresponding to the side magnet of the magnetic circuit system, and the side magnet extends into the clearance notch; And / or, the first housing is welded to or bonded to the second housing; And / or, the end of the second connector away from the voice coil is clamped between the first housing and the second housing; or, the sidewall is provided with a clearance groove for each second connector, and the end of the second connector away from the voice coil is disposed in the clearance groove; And / or, the outer casing is further provided with a vent; wherein, the vent is provided in the second casing and / or the first casing; and / or, the vent is formed by the first casing and the second casing.

12. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 11.

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