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 conversion, and the sound generating device comprises a shell, a magnetic circuit system and a vibration system, the magnetic circuit system is arranged in the shell, the magnetic circuit system is provided with a magnetic gap, the vibration system comprises a diaphragm, a voice coil, a first connecting piece and two second connecting pieces, the periphery of the diaphragm is connected with the shell, and the diaphragm is opposite to and spaced from the magnetic circuit system, the voice coil is located in the magnetic gap, the voice coil has two first sides and two second sides which are connected in a head-to-tail mode, one end of the first connecting piece is connected with the two first sides, the other end of the first connecting piece is connected with the diaphragm, one end of each second connecting piece is connected with one second side, and the other end of each second connecting piece is connected with the shell. 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 height of the product, thereby improving sound performance.

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

[0006] shell;

[0007] A magnetic circuit system, wherein the magnetic circuit system is disposed in the housing, and the magnetic circuit system is provided with a magnetic gap; and

[0008] A vibration system includes a diaphragm, a voice coil, a first connector, and two second connectors. The periphery of the diaphragm is connected to the outer shell and is opposite to and spaced from the magnetic circuit system. The voice coil is located within the magnetic gap and oscillates around an axis extending in a first direction under the action of magnetic force. The voice coil has two first sides and two second sides connected end to end. One end of the first connector is connected to the two first sides, and the other end of the first connector is connected to the diaphragm. The second connectors connect the voice coil and the outer shell, and 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.

[0009] In one embodiment, the voice coil is rectangular, with the first side extending along the first direction and the second side extending along the second direction, the first direction and the second direction being perpendicular to each other;

[0010] Wherein, the length of the first side extending along the first direction is greater than the length of the second side extending along the second direction.

[0011] In one embodiment, the first connector includes two first fixing portions extending along the first direction and at least one second fixing portion extending along the second 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 second direction to form an extension portion. At least a portion of the extension portion and the second fixing portion are connected to the diaphragm.

[0012] In one embodiment, the second fixing part and the two first fixing parts are integrally formed.

[0013] And / or, each of the first fixing portions has a third fixing portion at at least one end along the first direction that is close to and connected to the diaphragm;

[0014] And / or, each of the first fixing parts protrudes toward the diaphragm at the position corresponding to the second fixing part, and is connected to the second fixing part;

[0015] 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;

[0016] And / or, the extension is provided with reinforcing ribs on both sides along the first direction;

[0017] And / or, the second fixing part includes a plurality of second fixing parts, the plurality of second fixing parts are spaced apart along the first direction, and each second fixing part is connected to two first fixing parts and extends along the second direction to form the extension part;

[0018] And / or, the magnetic circuit system includes a central magnetic part and a side magnetic part, the side magnetic part is located outside the central magnetic part and is spaced apart from the central magnetic part to form the magnetic gap, and the side magnetic part has a clearance area corresponding to the extension.

[0019] In one embodiment, each of the second connectors includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion being connected to the housing and the second connecting portion being connected to the second side.

[0020] Wherein, the second connecting part is connected to the side of the second side facing the diaphragm; or, the second connecting part is connected to the side of the second side facing away from the diaphragm;

[0021] And / or, the first connecting portion and the second connecting portion are located on the same plane; or, the first connecting portion and the second connecting portion are located on different planes;

[0022] And / or, the two second connectors are arranged symmetrically.

[0023] In one embodiment, the magnetic circuit system includes a central magnetic portion and a side magnetic portion, the side magnetic portion being located outside the central magnetic portion and spaced apart from the central magnetic portion to form the magnetic gap;

[0024] The central magnetic part includes a central magnet, and the side magnetic part includes two side magnets. The two side magnets are respectively disposed on opposite sides of the central magnet along the second direction, and the central magnet and the two side magnets extend along the first direction. The side of the central magnet and the side magnets facing the diaphragm forms the surface of the magnetic circuit system.

[0025] The central magnet and the two side magnets are all magnetized along the second direction and the magnetization directions are the same, while the current directions in the two first side magnets are opposite.

[0026] In one embodiment, the first connector has an extension that extends along the second direction and is located outside the voice coil;

[0027] The extension is connected to the diaphragm, and the side magnet has a clearance area corresponding to the extension;

[0028] And / or, the width of the side magnet corresponding to the extension along the second direction is greater than or equal to the width of the other side magnet along the second direction.

[0029] In one embodiment, the sound-generating device further includes a conductive support piece, which is connected to the housing and has pads connected to the leads of the voice coil; wherein, the housing has a support boss corresponding to the pads, and the conductive support piece is partially supported and connected to the support bosses corresponding to the pads.

[0030] And / or, the diaphragm includes a dome and a folded ring surrounding the dome, the outer periphery of the folded ring being connected to the housing, and the first connector being connected to the dome;

[0031] And / or, the first connector is made of metal or hard plastic;

[0032] And / or, the material of the second connector is any one of silicone, rubber, cloth, or thin metal sheet.

[0033] 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.

[0034] 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;

[0035] And / or, the first housing is welded to or bonded to the second housing;

[0036] 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 side wall is provided with a clearance groove corresponding to the second connector, and the end of the second connector away from the voice coil is disposed in the clearance groove;

[0037] 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.

[0038] The present invention also proposes an electronic device, which includes the sound-generating device described above.

[0039] The sound-generating device of this invention connects a magnetic circuit system and a vibration system to a housing. The housing provides installation, fixation, and protection for both the magnetic circuit system and the vibration system. A magnetic gap is provided in the magnetic circuit system, allowing the periphery of the diaphragm of the vibration system to connect to the housing and be opposite and spaced from the magnetic circuit system. The voice coil is located within the magnetic gap. Thus, the magnetic circuit system provides a magnetic driving force to the voice coil. One end of a first connector is connected to the two first sides of the voice coil, and the other end is connected to the diaphragm. Second connectors connect the voice coil and the housing, with one end of each of the two second connectors connected to the two second sides of the voice coil, and the other end connected to the housing. This allows the two second sides of the voice coil to... The voice coil is fixed to the outer casing via two second connectors. At this time, the two first sides of the voice coil are driven by the magnetic field of the magnetic circuit system. This causes the two first sides of the voice coil to rotate and oscillate around the two second connectors as the rotation axis. That is, the voice coil oscillates around the axis extending along the first direction under the action of magnetic force. When the 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, thereby driving the diaphragm to vibrate in the up and down direction. In this way, when the voice coil oscillates at a small angle, the lever principle of the first connector can achieve a large displacement amplitude of the diaphragm. Thus, without increasing the height of the product, the amplitude of the sound-producing device can be greatly increased, thereby improving the sound performance. Attached Figure Description

[0040] 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.

[0041] Figure 1 A schematic diagram of the structure of an embodiment of the sound-generating device provided by the present invention;

[0042] Figure 2 A schematic diagram of the structure from another perspective in one embodiment of the sound-generating device provided by the present invention;

[0043] Figure 3 A cross-sectional schematic diagram along a first direction in one embodiment of the sound-generating device provided by the present invention;

[0044] Figure 4 A cross-sectional view along the second direction in one embodiment of the sound-generating device provided by the present invention;

[0045] Figure 5 This is a partially exploded schematic diagram of an embodiment of the sound-generating device provided by the present invention.

[0046] Figure 6An exploded view of an embodiment of the sound-generating device provided by the present invention;

[0047] Figure 7 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;

[0048] Figure 8 for Figure 7 A cross-sectional view along the AA direction;

[0049] 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;

[0050] Figure 10 for Figure 9 A cross-sectional view along the BB direction;

[0051] Figure 11 A partially enlarged schematic diagram of an embodiment of the sound-generating device provided by the present invention;

[0052] Figure 12 This is a schematic diagram of a structure of an embodiment of the vibration system provided by the present invention;

[0053] Figure 13 This is an exploded view of an embodiment of the vibration system provided by the present invention;

[0054] Figure 14 This is a schematic diagram of a second housing embodiment provided by the present invention.

[0055] Explanation of icon numbers:

[0056] 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; 123. Receiving cavity; 2. Magnetic circuit system; 21. Central magnetic part; 211. Central magnet; 22. Side magnetic part; 221. Side magnet; 222. Clearance area; 23. Magnetic gap; 3. Vibration system; 31. Diaphragm; 311. Ball Top; 312, surround; 32, voice coil; 321, first side; 322, second side; 33, first connector; 331, first fixing part; 3311, first connecting surface; 332, second fixing part; 3321, second connecting surface; 333, extension part; 3331, reinforcing rib; 334, third fixing part; 34, second connector; 341, first connecting part; 342, second connecting part; 35, conductive support; 351, solder pad.

[0057] 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

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] Please refer to the reference. Figures 1 to 14As shown, in this embodiment of the invention, the sound-generating device 100 includes a housing 1, a magnetic circuit system 2, and a vibration system 3. The magnetic circuit system 2 is disposed on the housing 1 and has a magnetic gap 23. The vibration system 3 includes a diaphragm 31, a voice coil 32, a first connector 33, and two second connectors 34. The periphery of the diaphragm 31 is connected to the housing 1 and is opposite to and spaced from the magnetic circuit system 2. The voice coil 32 is located within the magnetic gap 23 and oscillates around an axis extending in a first direction under the action of magnetic force. The voice coil 32 has two first sides 321 and two second sides 322 connected end to end. One end of the first connector 33 is connected to the two first sides 321, and the other end of the first connector 33 is connected to the diaphragm 31. The second connectors 34 connect the voice coil 32 and the housing 1, and 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.

[0064] 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.

[0065] 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 14 As 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] Optionally, the sound-generating device 100 is rectangular in shape. In this embodiment, the housing 1 of the sound-generating device 100 is optionally rectangular in shape. Figures 1 to 7 , 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.

[0070] It should be noted that, as Figures 1 to 11 As 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.

[0071] 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.

[0072] Optionally, the voice coil 32 is rectangular, with a first side 321 extending along a first direction and a second side 322 extending along a second direction, the first direction and the second direction being perpendicular to each other; wherein, the length of the first side 321 extending along the first direction is greater than the length of the second side 322 extending along the second direction.

[0073] In this embodiment, the magnetic circuit system 2 is provided with a magnetic gap 23, and the voice coil 32 is located within the magnetic gap 23. The two second sides 322 of the 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 the voice coil 32 are connected to one end of the 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.

[0074] Understandably, when current is passed through the voice coil 32, the voice coil 32 converts electrical energy into mechanical energy within the magnetic gap 23 formed by the magnetic circuit system 2, driving the voice coil 32 to vibrate. At this time, because the two second sides 322 of the 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 the voice coil 32 can hardly vibrate. The two first sides 321 of the voice coil 32 vibrate under the influence of the magnetic field of the magnetic circuit system 2. Due to the restriction imposed by the two second connectors 34, the voice coil 32... The two first sides 321 oscillate around the line connecting the two second connectors 34 as the axis of rotation or the center of rotation. That is, the voice coil 32 oscillates around the axis extending along the first direction under the action of magnetic force. The first connector 33 connected to the first side 321 of the voice coil 32 converts the rotational oscillation motion of the two first sides 321 of the 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 action of the first connector 33.

[0075] It should be noted that in existing technologies, the voice coil of a loudspeaker vibrates perpendicular to the magnet under the influence of 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 not conducive to driving the voice coil to vibrate at large amplitudes. As some smart products, such as terminals, are developing towards thinner and lighter designs, their internal space is limited, and the installation space available for loudspeakers is very limited. This makes it difficult to increase the height of the loudspeaker, thereby limiting the amplitude of the loudspeaker and thus limiting its sound performance.

[0076] In this embodiment, by setting a first connector 33 and two second connectors 34, the two second sides 322 of the voice coil 32 are connected to the outer shell 1 by the two second connectors 34, and the two first sides 321 of the voice coil 32 and the diaphragm 31 are connected by the first connector 33. Thus, when the two first sides 321 of the voice coil 32 rotate around the rotation axis formed by the line connecting the two second connectors 34, the rotational motion of the voice coil 32 is converted into the vertical motion of the first connector 33 away from the end of the voice coil 32 by the first connector 33, and the motion is transmitted to the diaphragm 31, so that the diaphragm 31 vibrates in a third direction and emits sound. Because the first connector 33 amplifies the displacement of the end of the first connector 33 away from the voice coil 32 by using the lever principle, the voice coil 32 only needs a small swing amplitude to achieve a large displacement of the diaphragm 31 through the first connector 33. Moreover, during the movement of the voice coil 32, it is always located within the magnetic gap 23 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 greatly increased, thereby improving the sound-generating performance.

[0077] In one embodiment, the first connector 33 includes two first fixing portions 331 extending along a first direction and at least one second fixing portion 332 extending along a second direction. At least portions of the two first fixing portions 331 are respectively connected to two first side edges 321. 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 second direction to form an extension portion 333. At least portions of the extension portion 333 and the second fixing portion 332 are connected to the diaphragm 31.

[0078] In this embodiment, as Figure 5 , Figure 6 , Figure 12 and Figure 13As shown, the extension direction of the first fixing part 331 of the first connector 33 is perpendicular to the extension direction of the second fixing part 332. The two first fixing parts 331 are respectively connected to the two first sides 321 of the voice coil 32. The second fixing part 332 connects the two first fixing parts 331 and is also connected to the diaphragm 31. The second fixing part 332 extends along the second direction to form an extension part 333, which is located outside the voice coil 32 and connected to the diaphragm 31. Thus, the voice coil 32 is connected to the diaphragm 31 via the first connector 33. The connection can be achieved either by connecting and reinforcing the two first fixing parts 331 through the second fixing part 332, or by connecting the diaphragm 31 with the extension part 333 extending along the second direction. In this way, when the two first sides 321 of the voice coil 32 rotate and swing, the first connecting member 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.

[0079] 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.

[0080] In this embodiment, the extension 333 is formed by extending the second fixing part 332 along the second 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. However, 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.

[0081] To further enhance the structural strength of the extension 333, in this embodiment, as... Figure 5 , Figure 6 , Figure 12 and Figure 13 As shown, the extension 333 is provided with reinforcing ribs 3331 on both sides along the first direction. It can be understood that the reinforcing ribs 3331 can extend in the direction away from the diaphragm 31, and can be ribs or arc-shaped structures, which are not limited here.

[0082] Optionally, the second fixing part 332 and the two first fixing parts 331 are integrally formed. This arrangement can improve the structural strength of the first connector 33.

[0083] 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 first direction, which is close to and connected to the diaphragm 31.

[0084] In this embodiment, as Figure 5 , Figure 6 , 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.

[0085] 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 5 , Figure 6 , Figure 12 and Figure 13 As shown, each first fixing part 331 protrudes towards the diaphragm 31 at the position corresponding to the second fixing part 332 and is connected to the second fixing part 332.

[0086] Understandably, the first fixing part 331 can be a strip-shaped structure extending along the first 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 first direction, and the two first fixing parts 331 extending along the first direction.

[0087] 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.

[0088] In this embodiment, as Figure 5 , Figure 6 , 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.

[0089] In one embodiment, the second fixing part 332 includes a plurality of second fixing parts 332 spaced apart along a first direction, and each second fixing part 332 is connected to two first fixing parts 331 and extends along a second direction to form an extension part 333.

[0090] Understandable, such as Figure 5 , Figure 6 , Figure 12 and Figure 13 As shown, 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 2, 3, 4 or more, which is not limited here.

[0091] 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 movement 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, etc., while non-metal materials include, for example, hard plastics, etc., 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, which are not limited here.

[0092] In one embodiment, the magnetic circuit system 2 includes a central magnetic part 21 and a side magnetic part 22, the side magnetic part 22 being located outside the central magnetic part 21 and spaced apart from the central magnetic part 21 to form a magnetic gap 23.

[0093] In this embodiment, as Figures 3 to 11 As shown, the voice coil 32 is located within the magnetic gap 23, that is, the voice coil 32 is arranged around the central magnetic part 21 and is located between the central magnetic part 21 and the side magnetic part 22. It can be understood that the side magnetic part 22 can be a ring structure, with the ring-shaped side magnetic part 22 surrounding the outside of the central magnetic part 21, in which case the side magnetic part 22 is a single ring structure. Of course, in other embodiments, there may be multiple side magnetic parts 22. These multiple side magnetic parts 22 can be connected end-to-end to form a ring structure and are arranged around the outside of the central magnetic part 21; or, multiple side magnetic parts 22 can be spaced apart and arranged around the outside of the central magnetic part 21, in which case there are gaps between adjacent side magnetic parts 22, which is not limited here.

[0094] Understandably, in order to reduce the magnetic driving force of the second side 322 of the voice coil 32 by the magnetic field of the magnetic circuit system 2, the side magnetic part 22 of the magnetic circuit system 2 is only provided on the outside of the first side 321 of the voice coil 32, that is, the side magnetic part 22 is not provided 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 of 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.

[0095] To prevent the extension 333 of the first connector 33 from interfering with the side magnet 22 when it moves along a third direction under the rotational oscillation of the voice coil 32, in one embodiment, the side magnet 22 is provided with a clearance area 222 corresponding to the extension 333. It is understood that the clearance area 222 can be a groove structure provided by the side magnet 22 corresponding to the extension 333; or, the clearance area 222 can be a through-hole structure provided by the side magnet 22 corresponding to the extension 333, and this is not limited thereto.

[0096] In this embodiment, as Figures 5 to 7 , Figure 9 As shown, the avoidance area 222 penetrates the side magnetic part 22 in a third direction and also penetrates the side magnetic part 22 in a second direction, so that the side magnetic part 22 located on the same side as the extension part 333 is divided into multiple parts by the avoidance area 222, which is not limited here.

[0097] 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 outer casing 1, and the second connecting portion 342 is connected to the second side 322.

[0098] In this embodiment, the first connecting portion 341 of the second connector 34 is connected to the outer casing 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 having 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 other flexible materials, which are not limited here.

[0099] 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 second direction is smaller than the width of the first connecting portion 341 and the second connecting portion 342 along the second 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.

[0100] 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.

[0101] 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 in a third direction and is connected to the second connecting portion 342. In this embodiment, the two second connecting members 34 are optionally arranged symmetrically, that is, the two second connecting members 34 are arranged symmetrically along the line connecting the center points of the two first side edges 321, which is not limited here.

[0102] In one embodiment, the magnetic circuit system 2 includes a central magnetic part 21 and a side magnetic part 22. The side magnetic part 22 is located outside the central magnetic part 21 and is spaced apart from the central magnetic part 21 to form a magnetic gap 23. The central magnetic part 21 includes a central magnet 211, and the side magnetic part 22 includes two side magnets 221. The two side magnets 221 are respectively disposed on opposite sides of the central magnet 211 along a second direction, and the central magnet 211 and the two side magnets 221 both extend along a first direction. The side of the central magnet 211 and the side magnets 221 facing the diaphragm 31 forms the surface of the magnetic circuit system 2.

[0103] In this embodiment, as Figures 5 to 7 , Figure 9 As shown, the central magnet 211 of the central magnet section 21 and the side magnet 221 of the side magnet section 22 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 understandable that neither the central magnet 211 of the central magnet section 21 nor the side magnet 221 of the side magnet section 22 has a washer structure on the side facing the diaphragm 31. This effectively increases the magnet volume of the central magnet 211 and the side magnet 221, and makes them suitable for ultra-thin products, allowing the magnets to be made thin.

[0104] Understandably, the side magnet portion 22 includes two side magnets 221, which are respectively located on opposite sides of the central magnet 211 along the second direction. That is, the two side magnets 221 are located outside the two first sides 321 of the voice coil 32, and no side magnets 221 are provided outside 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 central magnet 211 and the two side magnets 221 both extend along the first direction.

[0105] In this embodiment, as Figure 8 and Figure 10 As shown, the central magnet 211 and the two side magnets 221 are all magnetized along the second direction and in the same direction, while the currents in the two first sides 321 are in opposite directions. This ensures that the central magnet 211 and the two side magnets 221 work together to drive the magnetic field and increase the 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.

[0106] Understandably, the currents in the two first sides 321 are in opposite directions, so that when one first side 321 is upward, the other first side 321 is 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.

[0107] In this embodiment, to further increase the volume of the two side magnets 221, the two side magnets 221 also extend to the inner edge of the outer shell 1. Of course, in other embodiments, a clearance notch 1221 can also be provided on the outer shell 1, so that the two side magnets 221 extend into the clearance notch 1221 respectively, thereby increasing the magnet volume and improving the magnetic field strength.

[0108] In one embodiment, the first connector 33 has an extension 333 extending along a second direction and located outside the voice coil 32; wherein the extension 333 is connected to the diaphragm 31, and the side magnet 221 has a clearance area 222 corresponding to the extension 333. In this embodiment, as... Figures 5 to 7 , Figure 9 As shown, the side magnet 221 has a clearance area 222 corresponding to the extension 333, which ensures that the extension 333 avoids interference with the side magnet 221 when it moves in a third direction.

[0109] Optionally, the width of the side magnet 221 corresponding to the extension 333 along the second direction is greater than or equal to the width of the other side magnet 221 along the second direction. Understandably, this arrangement can, on the one hand, compensate for the reduced magnetic field strength of the side magnet 221 due to the setting of the avoidance area 222, and on the other hand, increase the magnetic field driving force of the first side edge 321 of the voice coil 32 located on one side of the extension 333.

[0110] In one embodiment, the sound-generating device 100 further includes a conductive support plate 35, which is connected to the housing 1 and has a solder pad 351 connected to the lead wire of the voice coil 32.

[0111] In this embodiment, as Figures 1 to 3 , Figures 5 to 7 , Figure 9 , Figure 11 As shown, by setting the conductive support piece 35, the voice coil 32 is connected to the external circuit through the conductive support piece 35. It is understood that the housing 1 has a through hole, one end of the conductive support piece 35 extends into the housing 1 through the through hole, and has a pad 351, to which the lead of the voice coil 32 is connected. The other end of the conductive support piece 35 located on the outside of the housing 1 has an external pad for connecting to the external circuit; this is not limited here.

[0112] Optionally, the outer casing 1 has a support boss 1211 corresponding to the pad 351, and the conductive support piece 35 is partially supported and connected to the support boss 1211 corresponding to the pad 351. In this embodiment, as shown... Figure 6 , Figure 7 , Figure 9 , Figure 11 and Figure 14 As shown, the outer shell 1 has a support boss 1211 at one end of the conductive support piece 35 that extends into the outer shell 1, so that the end of the conductive support piece 35 that extends into the outer shell 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 pad 351.

[0113] In this embodiment, the conductive support piece 35 is located on one side of the short 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 pad 351 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.

[0114] In one embodiment, the diaphragm 31 includes a dome 311 and a folded ring 312 surrounding the dome 311. The outer periphery of the folded ring 312 is connected to the outer shell 1, and the first connector 33 is connected to the dome 311.

[0115] In this embodiment, as Figure 1 , Figures 3 to 6 , 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.

[0116] Understandably, the inner ring portion of the folded ring 312 has a perforated hole, and the dome 311 is connected to the inner ring portion and covers the perforated hole, 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.

[0117] 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.

[0118] 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.

[0119] Understandably, the magnetic circuit system 2 is 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.

[0120] In one embodiment, the sidewall 122 is provided with a clearance notch 1221 corresponding to the side magnet 221 of the magnetic circuit system 2, and the side magnet 221 extends into the clearance notch 1221.

[0121] 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 221 extends into the clearance notch 1221, thereby increasing the magnet volume and enhancing the magnetic field strength.

[0122] 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... Figures 1 to 3 , Figures 5 to 7 , Figure 9 and Figure 14 As shown, the side wall 122 is provided with a relief groove 1222 corresponding to the 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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 magnetic circuit system, wherein the magnetic circuit system is disposed in the housing, and the magnetic circuit system is provided with a magnetic gap; and A vibration system includes a diaphragm, a voice coil, a first connector, and two second connectors. The periphery of the diaphragm is connected to the outer shell and is opposite to and spaced from the magnetic circuit system. The voice coil is located within the magnetic gap and oscillates around an axis extending in a first direction under the action of magnetic force. The voice coil has two first sides and two second sides connected end to end. One end of the first connector is connected to the two first sides, and the other end of the first connector is connected to the diaphragm. The second connectors connect the voice coil and the outer shell, and 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.

2. The sound-generating device as described in claim 1, characterized in that, The voice coil is rectangular, with the first side extending along the first direction and the second side extending along the second direction, the first direction and the second direction being perpendicular to each other; Wherein, the length of the first side extending along the first direction is greater than the length of the second side extending along the second direction.

3. The sound-generating device as described in claim 2, characterized in that, The first connector includes two first fixing portions extending along the first direction and at least one second fixing portion extending along the second 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 second direction to form an extension portion. At least a portion of the extension portion and the second fixing portion are connected to the diaphragm.

4. The sound-generating device as described in claim 3, characterized in that, The second fixing part and the two first fixing parts are integrally formed. And / or, each of the first fixing portions has a third fixing portion at at least one end along the first direction that is close to and connected to the diaphragm; And / or, each of the first fixing parts protrudes toward the diaphragm at the position corresponding to 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 extension is provided with reinforcing ribs on both sides along the first direction; And / or, the second fixing part includes a plurality of second fixing parts, the plurality of second fixing parts are spaced apart along the first direction, and each second fixing part is connected to two first fixing parts and extends along the second direction to form the extension part; And / or, the magnetic circuit system includes a central magnetic part and a side magnetic part, the side magnetic part is located outside the central magnetic part and is spaced apart from the central magnetic part to form the magnetic gap, and the side magnetic part has a clearance area corresponding to the extension.

5. The sound-generating device as described in claim 2, characterized in that, Each of the second connectors includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion being connected to the housing, and the second connecting portion being connected to the second side. Wherein, the second connecting part is connected to the side of the second side facing the diaphragm; or, the second connecting part is connected to the side of the second side facing away from the diaphragm; And / or, the first connecting portion and the second connecting portion are located on the same plane; or, the first connecting portion and the second connecting portion are located on different planes; And / or, the two second connectors are arranged symmetrically.

6. The sound-generating device as described in claim 2, characterized in that, The magnetic circuit system includes a central magnetic part and a side magnetic part, wherein the side magnetic part is located outside the central magnetic part and is spaced apart from the central magnetic part to form the magnetic gap; The central magnetic part includes a central magnet, and the side magnetic part includes two side magnets. The two side magnets are respectively disposed on opposite sides of the central magnet along the second direction, and the central magnet and the two side magnets extend along the first direction. The side of the central magnet and the side magnets facing the diaphragm forms the surface of the magnetic circuit system. The central magnet and the two side magnets are all magnetized along the second direction and the magnetization directions are the same, while the current directions in the two first side magnets are opposite.

7. The sound-generating device as described in claim 6, characterized in that, The first connector has an extension that extends along the second direction and is located outside the voice coil; The extension is connected to the diaphragm, and the side magnet has a clearance area corresponding to the extension; And / or, the width of the side magnet corresponding to the extension along the second direction is greater than or equal to the width of the other side magnet along the second direction.

8. The sound-generating device as claimed in claim 1, characterized in that, The sound-generating device further includes a conductive support piece, which is connected to the housing and has a pad connected to the lead wire of the voice coil; wherein, the housing has a support boss corresponding to the pad, and the conductive support piece is partially supported and connected to the support boss corresponding to the pad; And / or, the diaphragm includes a dome and a folded ring surrounding the dome, the outer periphery of the folded ring being connected to the housing, and the first connector being connected to the dome; 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.

9. The sound-generating device as described in any one of claims 1 to 8, 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.

10. The sound-generating device as claimed in claim 9, 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 side wall is provided with a clearance groove corresponding to the 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.

11. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 10.

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