Sound production device and electronic device

Abstract

This invention discloses a sound-generating device and electronic device, relating to the field of electroacoustic transduction technology. The sound-generating device has a ring-shaped metal casing. Two voice coils of a vibration system are spaced apart along a second direction. Two frames connect the two voice coils to a diaphragm assembly. The top wall of each frame is connected to the diaphragm assembly. Two first connecting walls of each frame are respectively connected to the two first short sides of each voice coil. The first segment of each first connecting wall is connected to the inner surface of the first short side, and the second segment is connected to the bottom surface of the first short side. Two magnetic circuit components of a magnetic circuit system are spaced apart along the second direction on the base plate of a yoke. Each voice coil surrounds one magnetic circuit component. The side plate of the yoke is welded to the end of the metal casing furthest from the diaphragm assembly. This invention increases the magnet volume and improves the BL value, thereby enhancing acoustic performance.

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 further development of science and technology, the field of smart electronics has also ushered in a period of rapid development. People have put forward more demands for the development of smart terminal electronic products, gradually forming new trends such as high performance, miniaturization, and thinness in electronic products. As the sound-producing unit of smart electronic products, the high performance, high sound quality, and thinness of speakers have gradually become mainstream consumer demands. Especially with the development of headphones, the requirements for speakers in headphones are getting higher and higher. In order to improve the performance of speakers, product designs are becoming more and more extreme, and space utilization is also becoming more and more efficient.

[0003] In related technologies, it is difficult to achieve a speaker width of 4mm, mainly due to the large space occupied by the shell wall thickness and the adhesive gap. At the same time, the outer diameter of the voice coil in the speaker is limited by the inner diameter of the diaphragm's vibrating part. Usually, the voice coil cannot exceed the inner diameter of the vibrating part; otherwise, the movement of the diaphragm's surround will be restricted, which will limit the size of the magnetic circuit system. The magnetic circuit size cannot be increased, thus affecting the speaker's acoustic performance and preventing enhancement. Summary of the Invention

[0004] The main objective of this invention is to provide a sound-generating device and an electronic device that addresses the problem of limited internal space in existing sound-generating devices, which prevents the increase of magnet volume. This sound-generating device increases magnet volume and improves BL value, thereby enhancing acoustic performance.

[0005] To achieve the above objectives, the present invention provides a sound-generating device, the sound-generating device comprising: Metal casing, the metal casing is ring-shaped; A vibration system vibrates along a first direction. The vibration system includes a diaphragm assembly, two voice coils, and two frames. The outer periphery of the diaphragm assembly is connected to one end of a metal housing. The two voice coils are spaced apart along a second direction. Each voice coil has two first long straight sides extending along the second direction and two first short sides connecting the two first long straight sides. The two first long straight sides and the two first short sides are connected end-to-end. Each frame connects one voice coil and the diaphragm assembly. Each frame includes a top wall and two first connecting walls that bend and extend from both ends of the top wall along the second direction. The two first connecting walls are respectively connected to the two first short sides of each voice coil. Each first connecting wall includes a first segment extending along the first direction and a second segment that bends and extends along the second direction from the end of the first segment away from the diaphragm assembly. The first segment is connected to the inner surface of the first short side, and the second segment is connected to the bottom surface of the first short side. The first direction and the second direction are perpendicular to each other. A magnetic circuit system, the magnetic circuit system including a magnetic yoke and two magnetic circuit components spaced apart from the magnetic yoke along the second direction, each of the voice coils surrounding one of the magnetic circuit components; The magnetic yoke includes a base plate and a side plate that extends from the periphery of the base plate. Two magnetic circuit assemblies are spaced apart on the base plate along the second direction. The side plate is welded to the end of the metal housing away from the diaphragm assembly.

[0006] In one embodiment, each of the skeletons further includes two second connecting walls located between the two first connecting walls, the two second connecting walls being respectively connected to the two sides of the top wall along the third direction, and the two second connecting walls being respectively connected to the two first long straight sides of each of the voice coils; The first direction, the second direction, and the third direction are arranged perpendicularly to each other.

[0007] In one embodiment, each of the second connecting walls includes a third segment and a fourth segment extending in the second direction from the end of the third segment away from the diaphragm assembly, the third segment being connected to the inner surface of the first long straight side, the fourth segment being connected to the bottom surface of the first long straight side, and the fourth segment not exceeding the outer edge of the bottom surface of the first long straight side.

[0008] In one embodiment, the magnetic circuit assembly includes a first magnet and a magnetic guide plate stacked along the first direction, wherein the first magnet is connected to the base plate; Both the first magnet and the magnetic plate have clearance grooves corresponding to the second connecting wall.

[0009] In one embodiment, the diaphragm assembly includes a diaphragm and a vibrating plate. The diaphragm includes a central portion, a folded ring portion, and a fixing portion connected in sequence. The fixing portion is connected to one end of the metal housing, and the vibrating plate is connected to the central portion. The vibrating plate is located on the side of the central part facing away from the voice coil, and the top wall is connected to the central part; Alternatively, the diaphragm is located on the side of the central portion facing the voice coil, and the top wall is connected to the diaphragm.

[0010] In one embodiment, a third direction is defined to be perpendicular to both the first direction and the second direction; Wherein, the distance between the two first long straight edges is greater than the dimension of the vibrating plate along the third direction; And / or, the dimension of the top wall along the third direction is not greater than the dimension of the vibrating plate along the third direction; And / or, the ratio of the dimension of the top wall along the third direction to the dimension of the vibrating plate along the third direction is 1:2 to 1:1; And / or, the top wall is provided with multiple through holes; wherein, the multiple through holes are irregularly distributed; or, the multiple through holes are arranged in an array.

[0011] In one embodiment, the outer wall of the side plate is flush with the outer wall of the metal casing.

[0012] In one embodiment, the side plate includes two side plates, each formed by bending and extending the two long sides of the base plate along the second direction; The vibration system further includes two centering supports, which are respectively located at both ends of the sound-generating device along the second direction. The centering support includes an outer connecting part, a deformation part, and an inner connecting part. The outer connecting part is connected to the metal shell, and the inner connecting part is connected to the first short side.

[0013] In one embodiment, the sound-generating device has a length along the second direction and a width along the third direction, wherein the ratio of the length to the width of the sound-generating device is 4:1 to 10:1. The first direction, the second direction, and the third direction are arranged perpendicularly to each other.

[0014] The present invention also proposes an electronic device, which includes the sound-generating device described above.

[0015] The sound-generating device of this invention uses a ring-shaped metal shell, connecting the vibration system and magnetic circuit system to their respective ends. This metal shell secures the connection between the vibration and magnetic circuit systems. Furthermore, the thin wall of the metal shell, while maintaining structural strength, effectively increases the internal cavity structure within the same dimensions, thereby increasing the volume of the magnetic circuit system to enhance magnetic field strength, improve the BL value, and ultimately improve acoustic performance. The magnetic yoke of the magnetic circuit system is welded to the end of the metal shell furthest from the diaphragm assembly via a side plate, improving connection stability and reliability. The vibration system comprises a diaphragm assembly, two voice coils, and two frames. The two voice coils are spaced apart along a second direction, and the two frames connect the two voice coils to the diaphragm assembly. The magnetic circuit system consists of a yoke and two magnetic circuit components on the yoke, spaced apart along the second direction on the yoke's base plate. Each voice coil surrounds one magnetic circuit component. Thus, under the magnetic field of the magnetic circuit system, the two voice coils vibrate simultaneously along a first direction, allowing them to vibrate through the two frames simultaneously. The diaphragm assembly vibrates and produces sound along a first direction. Furthermore, by configuring each frame as a top wall and two first connecting walls extending from the top wall along a second direction, the two top walls of the two frames are connected to the diaphragm assembly along the second direction, and the two first connecting walls of each frame are respectively connected to the two first short sides of each voice coil. This not only allows the two voice coils to be connected to the diaphragm assembly through the two frames, but also avoids the first connecting walls of the frames occupying the size of the first long straight side of the voice coil. This avoids the magnetic circuit system reducing its volume to avoid the connecting walls, thus ensuring an increased size between the two first long straight sides of the voice coil. Simultaneously, it increases the size of the magnetic circuit assembly along a third direction, thereby increasing the magnet volume, improving the BL value, and thus enhancing acoustic performance. Furthermore, by configuring each first connecting wall as a first segment extending along the first direction and a second segment extending from the end of the first segment away from the diaphragm assembly along the second direction, the first segment is connected to the inner surface of the first short side, and the second segment is connected to the bottom surface of the first short side. This increases the connection area between the first connecting wall and the first short side of the voice coil, further improving connection stability and reliability. Attached Figure Description

[0016] 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.

[0017] Figure 1 A top view schematic diagram of an embodiment of the sound-generating device provided by the present invention; Figure 2 A bottom view of an embodiment of the sound-generating device provided by the present invention; Figure 3 A cross-sectional view along the second direction in one embodiment of the sound-generating device provided by the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 A cross-sectional view along a third direction in one embodiment of the sound-generating device provided by the present invention; Figure 6 An exploded view of an embodiment of the sound-generating device provided by the present invention; Figure 7 This is a partial bottom view schematic diagram of an embodiment of the vibration system provided by the present invention; Figure 8 A partial cross-sectional schematic diagram along the second direction in one embodiment of the vibration system provided by the present invention; Figure 9 A schematic diagram of a skeleton provided by the present invention; Figure 10 A schematic diagram of another embodiment of the skeleton provided by the present invention.

[0018] Explanation of icon numbers: 100. Sound-generating device; 1. Metal casing; 2. Vibration system; 21. Diaphragm assembly; 211. Diaphragm; 2111. Center part; 2112. Hoop part; 2113. Fixing part; 212. Vibrating plate; 22. Voice coil; 221. First long straight side; 222. First short side; 23. Frame; 231. Top wall; 2311. Through hole; 232. First connecting wall; 2321. First segment; 2322, Second section; 233, Second connecting wall; 2331, Third section; 2332, Fourth section; 24, Centering support plate; 241, Outer connecting part; 242, Deformation part; 243, Inner connecting part; 3, Magnetic circuit system; 31, Magnetic yoke; 311, Base plate; 312, Side plate; 32, Magnetic circuit assembly; 321, First magnet; 322, Magnetic guide plate; 323, Clearance groove; 33, Magnetic gap.

[0019] 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

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] This invention proposes a sound-generating device 100. It is understood that the sound-generating device 100 is applied to electronic devices, such as mobile phones, headphones, smart wearable devices, etc., and is not limited thereto.

[0025] Please refer to the reference. Figures 1 to 10As shown, in this embodiment of the invention, the sound-generating device 100 includes a metal housing 1, a vibration system 2, and a magnetic circuit system 3. The metal housing 1 is annular. The vibration system 2 vibrates along a first direction. The vibration system 2 includes a diaphragm assembly 21, two voice coils 22, and two frames 23. The outer periphery of the diaphragm assembly 21 is connected to one end of the metal housing 1. The two voice coils 22 are arranged at intervals along a second direction. Each voice coil 22 has two first long straight sides 221 extending along the second direction and two first short sides 222 connecting the two first long straight sides 221. The two first long straight sides 221 and the two first short sides 222 are connected end to end. Each frame 23 connects a voice coil 22 and a diaphragm assembly 21. Each frame 23 includes a top wall 231 and two first connecting walls 232 extending from the top wall 231 at both ends along the second direction. The two first connecting walls 232 are respectively connected to each voice coil 22 and the diaphragm assembly 21. Two first short sides 222 of a voice coil 22 are connected to each other. Each first connecting wall 232 includes a first segment 2321 extending along a first direction and a second segment 2322 extending along a second direction from the end of the first segment 2321 away from the diaphragm assembly 21. The first segment 2321 is connected to the inner surface of the first short side 222, and the second segment 2322 is connected to the bottom surface of the first short side 222. The first direction and the second direction are perpendicular to each other. The magnetic circuit system 3 includes a yoke 31 and two magnetic circuit assemblies 32 spaced apart from the yoke 31 along the second direction. Each voice coil 22 is arranged around a magnetic circuit assembly 32. The yoke 31 includes a base plate 311 and a side plate 312 extending from the periphery of the base plate 311. The two magnetic circuit assemblies 32 are spaced apart from the base plate 311 along the second direction. The side plate 312 is welded to the end of the metal shell 1 away from the diaphragm assembly 21.

[0026] 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 3 and the vibration system 2 of the sound-generating device 100 are arranged opposite to each other.

[0027] Understandably, the diaphragm assembly 21 of the vibration system 2 is positioned opposite to the magnetic circuit system 3. The magnetic circuit system 3 has a magnetic gap 33. One end of each voice coil 22 of the vibration system 2 is connected to the diaphragm assembly 21 through a frame 23, and the other end of each voice coil 22 is suspended within the magnetic gap 33 of the magnetic circuit system 3, so that each voice coil 22 is arranged around a magnetic circuit assembly 32. When current is passed through the two voice coils 22, the two voice coils 22 vibrate within the magnetic field formed by the magnetic circuit system 3, that is, they reciprocate within the magnetic gap 33. This causes the magnetic circuit system 3 to drive the two voice coils 22 to vibrate the two frames 23 and the diaphragm assembly 21 respectively, thereby achieving sound production.

[0028] To better assemble the magnetic circuit system 3 and the vibration system 2 of the sound-generating device 100, in one embodiment, as... Figures 2 to 6As shown, the sound-generating device 100 also includes a metal housing 1. One end of the metal housing 1 is connected to the magnetic circuit system 3, and the other end of the metal housing 1 is connected to the outer periphery of the vibration system 2, that is, the periphery of the diaphragm assembly 21 is connected to the other end of the metal housing 1. This makes the diaphragm assembly 21 of the vibration system 2 and the magnetic circuit system 3 arranged opposite to each other.

[0029] In this embodiment, as Figures 2 to 6 As shown, by using a metal shell 1, that is, the metal shell 1 is made of metal material, such as metal sheet or steel sheet processed into a ring structure, the wall thickness of the metal shell 1 can be made thinner while maintaining the corresponding structural strength. Under the same size, the cavity structure inside the metal shell 1 can be effectively increased, thereby increasing the volume of the magnetic circuit system 3 to improve the magnetic field strength, increase the BL value, and thus improve the acoustic performance.

[0030] It should be noted that the metal shell 1 is used to install, fix, and support components such as the magnetic circuit system 3 and the vibration system 2; that is, the metal shell 1 provides the mounting base for components such as the magnetic circuit system 3 and the vibration system 2. It is understood that the metal shell 1 can be a single integral structure or formed by multiple separate structures, and this is not limited here. In this embodiment, the metal shell 1 can be a rectangular or racetrack-shaped frame or structure, that is, the metal shell 1 has a cavity with openings at both ends. The magnetic circuit system 3 and the vibration system 2 are respectively connected to the two sides of the metal shell 1 and are arranged opposite to each other, so that the magnetic circuit system 3, the metal shell 1, and the diaphragm 211 of the vibration system 2 enclose and form a vibration cavity. Of course, the metal shell 1 can also be other shapes or irregular structures, and this is not limited here.

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

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

[0033] Optionally, the sound-generating device 100 is rectangular or racetrack-shaped. In this embodiment, the metal housing 1 of the sound-generating device 100 may optionally be a rectangular or racetrack-shaped annular structure. To facilitate the connection and assembly of the vibration system 2 and the magnetic circuit system 3 with the metal housing 1, the outer contours of the vibration system 2 and the magnetic circuit system 3 may optionally be rectangular or racetrack-shaped.

[0034] It should be noted that, as Figures 1 to 10 As shown, in a specific example, the vibration direction of the vibration system 2 of the sound-generating device 100 is the first direction (i.e., the thickness direction of the sound-generating device 100), the long side direction of the sound-generating device 100 (i.e., the length direction of the sound-generating device 100) is the second direction, and the short side direction of the sound-generating device 100 (i.e., the width direction of the sound-generating device 100) is the third direction. Optionally, the first direction, the second direction, and the third direction are perpendicular to each other.

[0035] In this embodiment, the first direction is the thickness direction or Z-direction of the sound-generating device 100, the vibration system 2 vibrates along the first direction (e.g., the vertical direction), the second direction is the length direction or X-direction of the sound-generating device 100, and the third direction is the width direction or Y-direction of the sound-generating device 100.

[0036] Understandably, the sound-generating device 100 has a length along the second direction and a width along the third direction. Optionally, the length-to-width ratio of the sound-generating device 100 is 4:1 to 10:1.

[0037] In this embodiment, as Figure 1 , Figure 2 and Figure 6 As shown, the sound-generating device 100 has an elongated strip-shaped structure extending along the second direction. The length-to-width ratio of the sound-generating device 100 is 4:1 to 10:1, that is, the ratio of the length to the width of the sound-generating device 100 is 4:1 to 10:1. Optionally, the length-to-width ratio of the sound-generating device 100 can be 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, etc., and is not limited here.

[0038] Understandable, such as Figures 1 to 6As shown, by connecting the outer periphery of the diaphragm assembly 21 of the vibration system 2 to the metal shell 1, the vibration system 2 is fixed to the metal shell 1. At this time, the outer contour of the metal shell 1 and the outer contour of the diaphragm assembly 21 are the outer contour of the sound-generating device 100, that is, the length-to-width ratio of the diaphragm assembly 21 is 4:1 to 10:1. In order to avoid the first long straight side 221 of the voice coil 22 being too long and affecting the sound production effect of the diaphragm assembly 21, the vibration system 2 is provided with two voice coils 22 and two frames 23. The two voice coils 22 are spaced apart along the second direction, so that the two frames 23 respectively connect the two voice coils 22 to the diaphragm assembly 21. In this way, the two voice coils 22 are connected to the diaphragm assembly 21 through the two frames 23. At the same time, by using the two voice coils 22 and the two frames 23 spaced apart along the second direction, not only is the diaphragm assembly 21 supported in the length direction, but the sound production effect of the diaphragm assembly 21 can also be effectively improved.

[0039] In this embodiment, as Figure 5 and Figure 6 As shown, the magnetic yoke 31 includes a base plate 311 and a side plate 312 that extends from the periphery of the base plate 311. Two magnetic circuit components 32 are spaced apart on the base plate 311 along the second direction and are spaced apart from the side plate 312 to form a magnetic gap 33. Each voice coil 22 is located in a magnetic gap 33 and each voice coil 22 is arranged around a magnetic circuit component 32.

[0040] Understandably, by setting the magnetic yoke 31 as a base plate 311 and a side plate 312, the two magnetic circuit components 32 are spaced apart on the base plate 311 along the second direction and spaced apart from the side plate 312, so that the side plate 312 and the two magnetic circuit components 32 form two magnetic gaps 33 spaced apart along the second direction. At this time, the two voice coils 22 correspond to the two magnetic gaps 33 respectively, and each voice coil 22 is located in a magnetic gap 33. Thus, the two magnetic circuit components 32 of the magnetic circuit system 3 form a magnetic field, and form a magnetic circuit with the base plate 311 and the side plate 312 of the magnetic yoke 31 respectively, passing through each voice coil 22 in each magnetic gap 33, thereby ensuring the driving force of the magnetic circuit system 3 on the two voice coils 22.

[0041] Optionally, the base plate 311 and side plate 312 of the magnetic yoke 31 can be integrally formed. In this embodiment, the base plate 311 and side plate 312 are formed by integral stretching, which is not limited here. One end of the metal shell 1 is connected to the side plate 312, and the other end of the metal shell 1 is connected to the outer periphery of the diaphragm assembly 21. Optionally, the metal shell 1 is welded to the side plate 312 of the magnetic yoke 31. This can improve the connection stability and reliability between the metal shell 1 and the magnetic yoke 31 of the magnetic circuit system 3, which is not limited here.

[0042] Of course, in other embodiments, the metal shell 1 and the side plate 312 of the magnetic yoke 31 can also be bonded together, which is not limited here.

[0043] Optionally, the outer wall of the side plate 312 is flush with the outer wall of the metal casing 1. Understandably, this ensures both the aesthetic appearance of the sound-generating device 100 and the structural strength of the metal casing 1 within the same dimensions, while maximizing the volume inside the metal casing 1, thereby increasing the volume of the magnetic circuit system 3.

[0044] In this embodiment, the metal casing 1 includes an annular body extending along a first direction. Optionally, the thickness of the annular body is 0.2mm to 0.8mm. This ensures the structural strength of the metal casing 1 while allowing the annular body to be relatively thin, maximizing the volume within the metal casing 1 and thus increasing the volume of the magnetic circuit system 3. Optionally, the thickness of the annular body can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc., and is not limited here.

[0045] Optionally, the side plate 312 includes two side plates, which are formed by bending and extending the two long sides of the base plate 311 along the second direction.

[0046] In this embodiment, as Figure 5 and Figure 6 As shown, the metal casing 1 is connected to the two side plates 312 of the magnetic yoke 31 at the ends away from the base plate 311. Optionally, the outer wall of the metal casing 1 is flush with the outer wall of the side plate 312. This ensures both the aesthetic appearance of the sound-generating device 100 and the structural strength of the metal casing 1 within the same dimensions, while maximizing the volume inside the metal casing 1, thereby increasing the volume of the magnetic circuit system 3.

[0047] Understandably, by bending and extending the two long sides of the base plate 311 along the second direction to form two side plates 312, the two side plates 312 are positioned opposite each other and spaced apart along the third direction. This allows the two side plates 312 to form magnetic gaps 33 with the two magnetic circuit components 32. Since the aspect ratio of the voice coil 22 is greater than 2, that is, the size of the two first long straight sides 221 of the voice coil 22 is much larger than the size of the two first short sides 222 of the voice coil 22, the two first long straight sides 221 are positioned as close as possible within the magnetic gaps 33 formed by the magnetic circuit components 32 and the two side plates 312. This allows the two first long straight sides 221 to be subjected to a stronger magnetic field, thereby increasing the driving force on the voice coil 22. Since the size of the two first short sides 222 is small, the driving force from the magnetic field is limited.

[0048] Understandable, such as Figure 1 , Figure 6As shown, the diaphragm assembly 21 of the vibration system 2 can optionally be rectangular or racetrack-shaped. In this embodiment, the diaphragm assembly 21 includes a middle portion, a folded ring portion 2112, and a fixing portion 2113 connected in sequence, that is, the folded ring portion 2112 is arranged around the middle portion, and the fixing portion 2113 is arranged around the folded ring portion 2112. The fixing portion 2113 of the diaphragm assembly 21 is connected to one end of the metal shell 1, and the magnetic yoke 31 of the magnetic circuit system 3 is connected to the other end of the metal shell 1.

[0049] It should be noted that the middle portion of the diaphragm assembly 21 can be either planar or flat, and the plane containing the middle portion is perpendicular to the first direction. The folded ring portion 2112 of the diaphragm assembly 21 is the folded ring of the diaphragm assembly 21, and the folded ring portion 2112 can be a convex structure that protrudes upward along the first direction or a concave structure that is recessed downward; no limitation is made here. The inner edge of the folded ring portion 2112 is connected to the outer edge of the middle portion, and the outer edge of the folded ring portion 2112 is connected to the inner edge of the fixing portion 2113. The fixing portion 2113 of the diaphragm assembly 21 is used to connect to the metal housing 1. The fixing part 2113 may extend along a plane perpendicular to the first direction to form a planar or flat plate connecting part, in which case the fixing part 2113 is connected to the end face of one end of the metal shell 1; or, the fixing part 2113 may extend along the first direction to form a vertical planar or vertical plate connecting part parallel to the first direction, in which case the fixing part 2113 is connected to the inner side wall of the metal shell 1; or, the fixing part 2113 may include a planar or flat plate connecting part extending along a plane perpendicular to the first direction and a vertical planar or vertical plate connecting part extending along the first direction, in which case the fixing part 2113 is connected to the end face and the outer side wall of one end of the metal shell 1, which is not limited here.

[0050] Optionally, the middle portion, the surround portion 2112, and the fixing portion 2113 of the diaphragm assembly 21 are integrally formed. In this embodiment, the connection between the surround portion 2112 and the middle portion and the fixing portion 2113 is a smooth transition. Optionally, the surround portion 2112 protrudes towards the voice coil 22. That is, the surround portion 2112 is recessed downward along the first direction to form a concave structure, which is not limited here.

[0051] Optionally, the middle portion, the folded ring portion 2112, and the fixing portion 2113 are all square in shape. In this embodiment, the folded ring portion 2112 has two second long straight sides extending along the second direction and two second short sides connecting the two second long straight sides. The two second long straight sides and the two second short sides are connected end to end and are arranged around the middle portion.

[0052] It should be noted that the connection between the second long straight side and the second short side of the folded ring portion 2112 can be a right angle perpendicular to each other. In this case, the two second long straight sides and the two second short sides of the folded ring portion 2112 form a right-angled rectangle structure, that is, the second long straight side extends along the second direction, and the second short side extends along the third direction. Of course, for the sake of structural aesthetics, structural strength, and process requirements, the connection between the second long straight side and the second short side of the folded ring portion 2112 can also be a rounded corner structure with a smooth transition. In this case, the two second long straight sides and the two second short sides of the folded ring portion 2112 form a rounded rectangle or a racetrack-shaped structure, that is, the second short side has a first straight segment extending along the third direction and two first arc segments connecting the two ends of the first straight segment, and the second long straight side extends along the second direction and connects to the end of the first arc segment away from the first straight segment. Alternatively, the second short side can be entirely arc-shaped, which is not limited here.

[0053] In this embodiment, as Figures 6 to 8 As shown, the voice coil 22 has two first long straight sides 221 extending along a second direction and two first short sides 222 connecting the two first long straight sides 221. The two first long straight sides 221 and the two first short sides 222 are connected end to end, making the voice coil 22 a rectangular or racetrack-shaped ring structure. In this embodiment, the ratio of the dimension of the voice coil 22 along the second direction to the dimension of the voice coil 22 along the third direction can optionally be greater than 2, that is, the aspect ratio of the voice coil 22 is greater than 2, thus making the voice coil 22 a long strip structure.

[0054] It should be noted that the connection between the first long straight side 221 and the first short side 222 of the voice coil 22 can be a right angle perpendicular to each other. In this case, the two first long straight sides 221 and the two first short sides 222 of the voice coil 22 are connected end to end to form a right-angled rectangular structure. That is, the first long straight side 221 extends along the second direction, and the first short side 222 extends along the third direction. The aspect ratio of the voice coil 22 is the ratio of the dimension of the first long straight side 221 along the second direction to the dimension of the first short side 222 along the third direction. Of course, for aesthetic reasons, structural strength requirements, and manufacturing specifications, the connection between the first long straight side 221 and the first short side 222 of the voice coil 22 can also be a rounded corner structure with a smooth transition. In this case, the two first long straight sides 221 and the two first short sides 222 of the voice coil 22 connect end to end to form a rounded rectangle or racetrack-shaped structure. That is, the first short side 222 has a second straight segment extending along a third direction and two second arc-shaped segments connecting the two ends of the second straight segment. The first long straight side 221 extends along a second direction and connects to the end of the second arc-shaped segment away from the second straight segment. The aspect ratio of the voice coil 22 is the ratio of the distance between the two second straight segments along the second direction to the distance between the two first long straight sides 221 along the third direction. Alternatively, the first short side 222 can be entirely arc-shaped, and the aspect ratio of the voice coil 22 can be the ratio of the maximum distance between the two first short sides 222 along the second direction to the distance between the two first long straight sides 221 along the third direction. This is not limited here.

[0055] Optionally, the ratio of the first long straight side 221 to the first short side 222 of the voice coil 22 may be greater than 2, that is, the aspect ratio of the voice coil 22 is greater than 2, so that the voice coil 22 has a long strip structure.

[0056] In this embodiment, as Figures 3 to 10 As shown, by setting the frame 23 as a top wall 231 and two first connecting walls 232 extending from the top wall 231 at both ends along the second direction, the top wall 231 of the frame 23 is connected to the middle part of the diaphragm assembly 21, and the two first connecting walls 232 of the frame 23 are connected to the two first short sides 222 of the voice coil 22, so that the two voice coils 22 are connected to the diaphragm assembly 21 through the two frames 23 respectively.

[0057] Understandably, by connecting the first connecting wall 232 of the frame 23 to the first short side 222 of the voice coil 22, the voice coil 22 can be connected and fixed to the diaphragm assembly 21 through the frame 23, while avoiding the first connecting wall 232 of the frame 23 from occupying the size of the first long straight side 221 of the voice coil 22. This avoids the magnetic circuit system 3 from reducing its volume to avoid the first connecting wall 232, thereby ensuring that the size between the two first long straight sides 221 of the voice coil 22 is expanded, maximizing the setting size of the magnetic circuit assembly 32, increasing the magnet volume, improving the BL value, and thus improving the acoustic performance of the sound-generating device 100.

[0058] In this embodiment, as Figures 3 to 10 As shown, by configuring the first connecting wall 232 as a first segment 2321 extending along the first direction and a second segment 2322 extending along the second direction from the end of the first segment 2321 away from the diaphragm assembly 21, the first segment 2321 of the first connecting wall 232 is connected to the inner surface of the first short side 222 of the voice coil 22, and the second segment 2322 of the first connecting wall 232 is connected to the bottom surface of the first short side 222 of the voice coil 22, thereby increasing the connection area between the first connecting wall 232 and the first short side 222 of the voice coil 22, and further improving the connection stability and reliability.

[0059] It should be noted that the voice coil 22 has a top surface facing the diaphragm assembly 21, a bottom surface facing away from the diaphragm assembly 21, and a side surface connecting the top and bottom surfaces. The side surface of the voice coil 22 includes an inner side surface facing the magnetic circuit assembly 32 and an outer side surface facing away from the magnetic circuit assembly 32.

[0060] In this embodiment, the first segment 2321 of the first connecting wall 232 is connected to the inner surface of the first short side 222 of the voice coil 22, and the second segment 2322 of the first connecting wall 232 is connected to the bottom surface of the first short side 222 of the voice coil 22. Of course, in other embodiments, the first segment 2321 of the first connecting wall 232 is connected to the outer surface of the first short side 222 of the voice coil 22, and the second segment 2322 of the first connecting wall 232 is connected to the bottom surface of the first short side 222 of the voice coil 22, which is not limited here.

[0061] Optionally, the first connecting wall 232 is connected to the first short side 222 of the voice coil 22 by adhesive. In this embodiment, the first segment 2321 of the first connecting wall 232 is bonded to the inner surface of the first short side 222 of the voice coil 22, and the second segment 2322 of the first connecting wall 232 is bonded to the bottom surface of the first short side 222 of the voice coil 22, which is not limited here.

[0062] Optionally, the first segment 2321 and the second segment 2322 of the first connecting wall 232 are integrally formed. It is understood that the first segment 2321 and the second segment 2322 of the first connecting wall 232 can be integrally stretched or integrally injection molded, and there is no limitation here.

[0063] Optionally, the outer periphery of the top wall 231 of the frame 23 does not extend beyond the edge of the middle portion of the diaphragm assembly 21. It is understood that by setting the top wall 231 of the frame 23 to not extend beyond the edge of the middle portion, interference between the frame 23 and the folded portion 2112 of the diaphragm assembly 21 is avoided.

[0064] In one embodiment, the diaphragm assembly 21 includes a diaphragm 211 and a vibrating plate 212. The diaphragm 211 includes a central portion 2111, a folded ring portion 2112 and a fixing portion 2113 connected in sequence. The fixing portion 2113 is connected to one end of the metal housing 1, and the vibrating plate 212 is connected to the central portion 2111.

[0065] In this embodiment, as Figure 1 , Figures 3 to 8 As shown, the vibrating plate 212 is connected to the center portion 2111 of the diaphragm 211, so that the vibrating plate 212 and the center portion 2111 of the diaphragm 211 form the middle portion of the diaphragm assembly 21. Optionally, the center portion 2111 of the diaphragm 211, the folded ring portion 2112, and the fixing portion 2113 can be selected as an integrally formed structure.

[0066] Understandably, the central portion 2111 of the diaphragm 211 can be a flat or planar structure; alternatively, the central portion 2111 of the diaphragm 211 can also be an annular structure, i.e., the central portion 2111 has a perforated hole, which can reduce the weight of the diaphragm assembly 21. By providing a vibrating plate 212, which is connected to the central portion 2111, the vibrating plate 212 and the central portion 2111 form an intermediate part, thus the vibrating plate 212 can be used to strengthen the structural strength of the central portion 2111 of the diaphragm 211.

[0067] Optionally, the diaphragm 212 is located on the side of the center portion 2111 facing away from the voice coil 22. In this embodiment, the top wall 231 of the frame 23 is connected to the center portion 2111.

[0068] Optionally, the diaphragm 212 is located on the side of the center portion 2111 facing the voice coil 22. In this embodiment, the top wall 231 of the frame 23 is connected to the diaphragm 212.

[0069] In this embodiment, as Figures 5 to 7 As shown, the dimension of the top wall 231 along the third direction is not greater than the dimension of the vibrating plate 212 along the third direction. It can be understood that the dimension of the vibrating plate 212 is the same as the dimension of the center portion 2111 of the diaphragm 211. By setting the dimension of the top wall 231 along the third direction to be no greater than the dimension of the vibrating plate 212 along the third direction, interference between the frame 23 and the folded portion 2112 of the diaphragm assembly 21 is avoided.

[0070] Optionally, the ratio of the dimension of the top wall 231 along the third direction to the dimension of the vibrating plate 212 along the third direction is 1:2 to 1:1. In this embodiment, the ratio of the dimension of the top wall 231 along the third direction to the dimension of the vibrating plate 212 along the third direction is 1:2, 1:1.5, 1:1, etc., and is not limited here.

[0071] In one embodiment, the distance between the two first long straight edges 221 is greater than the dimension of the vibrating plate 212 along a third direction.

[0072] In this embodiment, as Figures 5 to 7 As shown, by setting the distance between the two first long straight edges 221 of the voice coil 22 to be greater than the dimension of the diaphragm 212 along a third direction, that is, the projection of the two first long straight edges 221 of the voice coil 22 along the first direction is located outside the inner edge of the second long straight edge. This ensures that the first long straight edges 221 of the voice coil 22 will not interfere with the loop portion 2112 of the diaphragm assembly 21, while simultaneously increasing the width between the two first long straight edges 221 of the voice coil 22 along a third direction. This allows the magnetic circuit assembly 32 to be enlarged along a third direction when the voice coil 22 surrounds the magnetic circuit assembly 32, thereby increasing the magnet volume, improving the BL value, and thus enhancing the acoustic performance of the sound-generating device 100.

[0073] In one embodiment, the projection of the first connecting wall 232 along the first direction is located outside the magnetic circuit assembly 32, and the projections of the first connecting wall 232 and the first short side 222 along the first direction are both located inside the second short side.

[0074] In this embodiment, as Figures 3 to 6 As shown, by placing the projections of the first connecting wall 232 and the first short side 222 of the voice coil 22 along the first direction inside the second short side of the surround portion 2112 of the diaphragm assembly 21, the voice coil 22 can be connected to the diaphragm assembly 21 via the frame 23, while ensuring that the first connecting wall 232 of the frame 23 and the first short side 222 of the voice coil 22 do not interfere with the surround portion 2112 of the diaphragm assembly 21. Furthermore, by placing the projection of the first long straight side 221 of the voice coil 22 along the first direction outside the inner edge of the second long straight side of the surround portion 2112, the sound... The first long straight edge 221 of the voice coil 22 will not interfere with the folded ring portion 2112 of the diaphragm assembly 21. At the same time, the width between the two first long straight edges 221 of the voice coil 22 along the third direction is increased, and the projection of the first connecting wall 232 along the first direction is located outside the magnetic circuit assembly 32. Thus, when the voice coil 22 is arranged around the magnetic circuit assembly 32, the first connecting wall 232 of the frame 23 will not interfere with the magnetic circuit assembly 32. At the same time, the size of the magnetic circuit assembly 32 along the third direction can be increased, thereby increasing the magnet volume, improving the BL value, and thus improving the acoustic performance of the sound generating device 100.

[0075] In this embodiment, given the limited space, the two voice coils 22 of the sound-generating device 100 are connected to the diaphragm assembly 21 via two frames 23, respectively. This ensures that the projections of the first short side 222 of each voice coil 22 and the first connecting wall 232 of each frame 23 along the first direction are both located inside the second short side of the surround portion 2112 of the diaphragm assembly 21, and the projection of the first long straight side 221 of each voice coil 22 along the first direction is located outside the inner edge of the second long straight side of the surround portion 2112. This expands the two first short sides of each voice coil 22. The width between the long straight sides 221 means that the outer diameter of each voice coil 22 along the third direction can be made larger and exceed the inner diameter of the middle part along the third direction, thereby increasing the size of the voice coil 22 and increasing the L value of the voice coil 22. At the same time, the size of the magnetic circuit assembly 32 located in the voice coil 22 along the third direction can be increased, which means that a larger magnetic circuit can be set on the inner side of the voice coil 22, thereby increasing the magnet volume of the magnetic circuit system 3. This allows the voice coil 22 to effectively increase the BL value when it vibrates in the magnetic field formed by the magnetic circuit system 3, thereby improving the acoustic performance of the sound generating device 100.

[0076] In one embodiment, the folded ring portion 2112 has a centerline position, and the portion of the second long straight edge located outside the centerline position at least partially overlaps with the projection of the first long straight edge 221 along the first direction.

[0077] In this embodiment, as Figure 5 As shown, the centerline of the folded ring portion 2112 is located at the midpoint of the line connecting the inner edge and the outer edge of the folded ring portion 2112. The second long straight edge of the folded ring portion 2112 has a first portion located outside the centerline position and a second portion located inside the centerline position.

[0078] Understandably, by at least partially overlapping the projection of the first long straight edge 221 of the voice coil 22 along the first direction with the projection of the portion of the second long straight edge of the loop 2112 located outside the centerline along the first direction, that is, by at least partially overlapping the projection of the first long straight edge 221 of the voice coil 22 along the first direction with the projection of the first portion of the second long straight edge located outside the centerline along the first direction, the width between the two first long straight edges 221 of the voice coil 22 is expanded. This means that the outer diameter of the voice coil 22 along the third direction can be made larger and exceed the inner diameter of the middle portion along the third direction, thereby increasing the size of the voice coil 22 and improving the L value of the voice coil 22. At the same time, the size of the magnetic circuit assembly 32 located in the voice coil 22 along the third direction can be increased, which means that a larger magnetic circuit can be provided on the inner side of the voice coil 22, thereby increasing the magnet volume of the magnetic circuit system 3. This allows the voice coil 22 to effectively increase the BL value when vibrating in the magnetic field formed by the magnetic circuit system 3, thereby improving the acoustic performance of the sound-generating device 100.

[0079] Optionally, the projection of the first long straight side 221 along the first direction is located outside the centerline position. In this embodiment, as... Figure 5 As shown, the projection of the first long straight edge 221 of the voice coil 22 along the first direction is located on the outer side of the center line along the first direction, that is, the side of the center line facing the fixing part 2113.

[0080] Optionally, the projection of the first long straight side 221 along the first direction is located inside the outer edge of the second long straight side. In this embodiment, as... Figure 5 As shown, the projection of the first long straight edge 221 along the first direction is located inside the outer edge of the second long straight edge of the folded ring portion 2112, that is, the projection of the first long straight edge 221 along the first direction does not coincide with the projection of the fixing portion 2113 along the first direction.

[0081] In this embodiment, as Figure 5 As shown, the projection of the first long straight edge 221 of the voice coil 22 along the first direction is located outside the centerline, and the projection of the first long straight edge 221 along the first direction is located inside the outer edge of the second long straight edge. That is, the projection of the first long straight edge 221 of the voice coil 22 along the first direction is located in the first part of the second long straight edge.

[0082] It should be noted that the number of skeletons 23 is the same as the number of voice coils 22, and the number of voice coils 22 is the same as the number of magnetic circuit components 32 in the magnetic circuit system 3. Of course, in other embodiments, the number of skeletons 23 may not be the same as the number of voice coils 22, and the number of magnetic circuit components 32 in the magnetic circuit system 3 may not be the same as the number of voice coils 22; this is not limited here.

[0083] In one embodiment, the top wall 231 of each frame 23 extends along a second direction and is located between two first short sides 222, and the two first connecting walls 232 are respectively connected to the two ends of the top wall 231 along the second direction.

[0084] In this embodiment, the top wall 231 of the frame 23 extends along the second direction and connects to the middle portion of the diaphragm assembly 21. The two first connecting walls 232 of the frame 23 are respectively connected to the two ends of the top wall 231 along the second direction, such that each first connecting wall 232 is correspondingly connected to a first short side 222 of the voice coil 22. This arrangement allows for the connection of the two first connecting walls 232 to the two first short sides 222 of the voice coil 22, and also increases the connection area between the top wall 231 and the middle portion, improving connection stability. Optionally, the top wall 231 is located between the two first short sides 222.

[0085] It is understandable that the dimension of the top wall 231 of the skeleton 23 extending along the second direction may be less than the distance between the two first short sides 222; or, the dimension of the top wall 231 of the skeleton 23 extending along the second direction may be greater than the distance between the two first short sides 222; or, the dimension of the top wall 231 of the skeleton 23 extending along the second direction may be equal to the distance between the two first short sides 222, and no limitation is made here.

[0086] In one embodiment, the top wall 231 is provided with a plurality of through holes 2311. In this embodiment, as shown... Figure 10 As shown, by providing multiple through holes 2311 in the top wall 231, the weight of the top wall 231 can be reduced, the sensitivity can be improved, the distortion can be reduced, and the connection area between the top wall 231 and the middle part can be ensured to improve the connection stability.

[0087] Optionally, the multiple through holes 2311 are spaced apart. It is understood that the multiple through holes 2311 are irregularly distributed; or, the multiple through holes 2311 are arranged in an array. In this embodiment, as... Figure 10 As shown, multiple through holes 2311 are arranged in an array along the second direction.

[0088] In one embodiment, each frame 23 further includes two second connecting walls 233 located between two first connecting walls 232. The two second connecting walls 233 are respectively connected to the two sides of the top wall 231 along the third direction. The two second connecting walls 233 are respectively connected to the two first long straight edges 221 of each voice coil 22. The first direction, the second direction and the third direction are arranged perpendicularly to each other.

[0089] In this embodiment, as Figure 3 , Figures 5 to 10 As shown, by setting a second connecting wall 233 on the frame 23, the second connecting wall 233 is connected to both sides of the top wall 231 along the third direction. In this way, the two second connecting walls 233 of the frame 23 are connected to the two first long straight edges 221 of the voice coil 22, so that the voice coil 22 is connected to the diaphragm assembly 21 through the frame 23.

[0090] Understandably, by using the two first connecting walls 232 and the two second connecting walls 233 of the frame 23 to connect to the two first short sides 222 and the two first long straight sides 221 of the voice coil 22 respectively, the connection stability and reliability between the frame 23 and the voice coil 22 are improved. At the same time, the size of the magnetic circuit assembly 32 is maximized, the magnet volume is increased, and the BL value is improved, thereby improving the acoustic performance of the sound-generating device 100.

[0091] In one embodiment, the top wall 231 of each frame 23 extends along a second direction and is located between two first short sides 222. The two first connecting walls 232 are respectively connected to the two ends of the top wall 231 along the second direction, and the two second connecting walls 233 are respectively connected to the two sides of the top wall 231 along a third direction.

[0092] In this embodiment, the top wall 231 of the frame 23 extends along the second direction and connects to the middle portion of the diaphragm assembly 21. Two first connecting walls 232 of the frame 23 are respectively connected to the two ends of the top wall 231 along the second direction, such that each first connecting wall 232 is correspondingly connected to a first short side 222 of the voice coil 22. Two second connecting walls 233 of the frame 23 are respectively connected to the two sides of the top wall 231 along the third direction, such that each second connecting wall 233 is correspondingly connected to a first long straight side 221 of the voice coil 22. This arrangement allows the two first connecting walls 232 to be connected to the two first short sides 222 of the voice coil 22, and the two second connecting walls 233 to be connected to the two first long straight sides 221 of the voice coil 22, while also increasing the connection area between the top wall 231 and the middle portion, thus improving connection stability. Optionally, the top wall 231 is located between the two first short sides 222.

[0093] It should be noted that, in order to ensure that the second connecting wall 233 of the frame 23 does not interfere with the surround portion 2112, the second connecting wall 233 is inclined or bent and recessed as it extends from the top wall 231 toward the first long straight edge 221 of the voice coil 22, thus forming a clearance space to avoid the surround portion 2112. Optionally, the second connecting wall 233 is inclined at least from one end near the top wall 231 to the top surface near the first long straight edge 221 of the voice coil 22.

[0094] It is understandable that the second connecting wall 233 of the frame 23 is connected to the top surface of the first long straight edge 221 of the voice coil 22; or, the second connecting wall 233 of the frame 23 is connected to the bottom surface of the first long straight edge 221 of the voice coil 22; or, the second connecting wall 233 of the frame 23 is connected to the side surface of the first long straight edge 221 of the voice coil 22; or, the second connecting wall 233 of the frame 23 is connected to the top surface and side surface of the first long straight edge 221 of the voice coil 22; or, the second connecting wall 233 of the frame 23 is connected to the bottom surface and side surface of the first long straight edge 221 of the voice coil 22; or, the second connecting wall 233 of the frame 23 is connected to the top surface, side surface and bottom surface of the first long straight edge 221 of the voice coil 22, without any limitation.

[0095] Optionally, the second connecting wall 233 is bonded to the top surface of the first long straight edge 221; or, the second connecting wall 233 is bonded to the bottom surface of the first long straight edge 221; or, the second connecting wall 233 is bonded to the side surface of the first long straight edge 221.

[0096] Of course, in other embodiments, the second connecting wall 233 is bonded to the top and side surfaces of the first long straight edge 221; or, the second connecting wall 233 is bonded to the bottom and side surfaces of the first long straight edge 221, which is not limited here.

[0097] In one embodiment, each second connecting wall 233 includes a third segment 2331 and a fourth segment 2332 extending from the end of the third segment 2331 away from the diaphragm assembly 21 in a second direction. The third segment 2331 is connected to the inner surface of the first long straight side 221, and the fourth segment 2332 is connected to the bottom surface of the first long straight side 221. The fourth segment 2332 does not exceed the outer edge of the bottom surface of the first long straight side 221.

[0098] In this embodiment, as Figure 3 , Figures 5 to 10 As shown, the third segment 2331 of the second connecting wall 233 is formed by extending the top wall 231 toward the first long straight edge 221 of the voice coil 22. The third segment 2331 can be inclined or extended along the first direction. Of course, the third segment 2331 includes an inclined segment and a vertical segment extending along the first direction, which is not limited here.

[0099] Understandably, in order to ensure that the second connecting wall 233 does not interfere with the folded ring portion 2112, at least the portion of the third segment 2331 of the second connecting wall 233 from the top wall 231 to the top surface of the first long straight edge 221 is inclined. In this way, the inclined arrangement of the third segment 2331 can effectively avoid interference between the third segment 2331 and the folded ring portion 2112.

[0100] In this embodiment, as Figures 5 to 10 As shown, the third segment 2331 of the second connecting wall 233 is connected to the side of the first long straight edge 221, and the fourth segment 2332 is connected to the bottom surface of the first long straight edge 221. Optionally, the fourth segment 2332 does not extend beyond the outer edge of the bottom surface of the first long straight edge 221. This arrangement ensures the maximization of the magnetic circuit assembly 32.

[0101] Understandable, such as Figure 5 , Figure 6 , Figure 9 and Figure 10 As shown, the third segment 2331 of the second connecting wall 233 includes an inclined segment that is inclined towards the first long straight edge 221 of the voice coil 22 from the top wall 231, and a vertical segment that extends along a first direction from the end of the inclined segment away from the top wall 231. In this case, the inclined segment of the third segment 2331 is used to avoid the folded ring portion 2112 of the diaphragm assembly 21, and the vertical segment of the third segment 2331 is connected to the side of the first long straight edge 221. The fourth segment 2332 is formed by extending along a third third direction from the end of the vertical segment of the third segment 2331 away from the inclined segment.

[0102] Optionally, the inclined section of the third segment 2331 is inclined from the top wall 231 to the top surface of the first long straight edge 221. This ensures the maximization of the magnetic circuit assembly 32 and avoids interference between the third segment 2331 and the folded ring portion 2112.

[0103] It should be noted that the voice coil 22 has an inner surface facing the magnetic circuit assembly 32 and an outer surface facing away from the magnetic circuit assembly 32. In this embodiment, as... Figure 6 As shown, the third segment 2331 of the second connecting wall 233 is connected to the inner surface of the first long straight edge 221; or, the third segment 2331 of the second connecting wall 233 is connected to the outer surface of the first long straight edge 221, which is not limited here.

[0104] In this embodiment, by connecting the third segment 2331 and the fourth segment 2332 of the second connecting wall 233 to the side and bottom surfaces of the first long straight edge 221 of the voice coil 22, the connection area between the second connecting wall 233 and the first long straight edge 221 is increased, thereby further improving the connection stability and reliability between the frame 23 and the voice coil 22.

[0105] Optionally, the second connecting wall 233 of the frame 23 is bonded to the first long straight edge 221 of the voice coil 22. In this embodiment, the third segment 2331 of the second connecting wall 233 is bonded to the inner surface of the first long straight edge 221, and the fourth segment 2332 is bonded to the bottom surface of the first long straight edge 221; or, the third segment 2331 of the second connecting wall 233 is bonded to the outer surface of the first long straight edge 221, and the fourth segment 2332 is bonded to the bottom surface of the first long straight edge 221, which is not limited here.

[0106] Optionally, such as Figure 5 , Figure 6 , Figure 9 and Figure 10 As shown, the third segment 2331 and the fourth segment 2332 of the second connecting wall 233 are integrally formed structures. It can be understood that the third segment 2331 and the fourth segment 2332 of the second connecting wall 233 can be integrally stretched or integrally injection molded, and no limitation is made here.

[0107] In this embodiment, the top wall 231, the first connecting wall 232, and the second connecting wall 233 of the skeleton 23 are integrally formed structures. It can be understood that the top wall 231, the first connecting wall 232, and the second connecting wall 233 of the skeleton 23 can be integrally stretched or integrally injection molded, and there is no limitation here.

[0108] To further prevent interference between the second connecting wall 233 and the magnetic circuit assembly 32 of the magnetic circuit system 3, optionally, the magnetic circuit assembly 32 is provided with a relief groove 323 corresponding to the second connecting wall 233.

[0109] In this embodiment, as Figure 6 As shown, by providing a clearance groove 323 in the magnetic circuit assembly 32, the clearance groove 323 provides clearance space for the second connecting wall 233, that is, the clearance groove 323 provides clearance space for the third segment 2331 of the second connecting wall 233.

[0110] It should be noted that the aspect ratio of the voice coil 22 is greater than 2, meaning that the dimension of the first long straight side 221 of the voice coil 22 along the second direction is much larger than the dimension of the first short side 222 of the voice coil 22 along the third direction. To ensure the connection stability between the frame 23 and the voice coil 22, the second connecting wall 233 of the frame 23 is connected to both sides of the top wall 231 along the third direction, and is connected to the first long straight side 221 of the voice coil 22 using the second connecting wall 233 to improve connection stability.

[0111] It is understood that the number of second connecting walls 233 can be one or more. When there is only one second connecting wall 233, optionally, the second connecting wall 233 is connected to the middle position of both sides of the top wall 231 along the third direction. When there are multiple second connecting walls 233, the multiple second connecting walls 233 are respectively connected to the two sides of the first long straight edge 221 of the top wall 231 facing the voice coil 22, and are spaced apart along the second direction, which is not limited here.

[0112] Optionally, the ratio of the extension length of the second connecting wall 233 along the second direction to the extension length of the first long straight side 221 along the second direction is in the range of 1:5 to 1:10. Understandably, this arrangement avoids the second connecting wall 233 of the frame 23 occupying too much of the size of the first long straight side 221 of the voice coil 22, thus preventing the magnetic circuit system 3 from reducing its volume to accommodate the excessively large second connecting wall 233. This ensures the size of the magnetic circuit assembly 32 along the third direction, thereby increasing the magnet volume, improving the BL value, and ultimately enhancing acoustic performance.

[0113] Optionally, the ratio of the extension length of the second connecting wall 233 along the second direction to the extension length of the first long straight side 221 along the second direction is in the range of 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, etc., and is not limited here.

[0114] In one embodiment, the vibration system 2 further includes a centering support 24, which includes two centering supports 24 respectively disposed at both ends of the sound-generating device 100 along the second direction; wherein, the centering support 24 includes an outer connecting part 241, a deformation part 242 and an inner connecting part 243, the outer connecting part 241 is connected to the metal shell 1, and the inner connecting part 243 is connected to the first short side 222.

[0115] In this embodiment, as Figures 2 to 4 , Figures 6 to 8As shown, by setting a centering support 24, the outer connecting part 241 of the centering support 24 is connected to the metal shell 1, and the inner connecting part 243 is connected to the first short side 222 and / or the first connecting wall 232. In this way, the centering support 24 is used to center the voice coil 22.

[0116] Understandably, the outer connecting part 241 of the centering support piece 24 is provided with an outer solder pad, which is used to connect and conduct with an external circuit. The inner connecting part 243 of the centering support piece 24 is provided with an inner solder pad, which is electrically connected to the lead wire of the voice coil 22. In this way, the centering support piece 24 can both center the voice coil 22 and connect the voice coil 22 to the external circuit.

[0117] It should be noted that the deformable portion 242 of the centering support 24 can deform during the vibration of the voice coil 22. To ensure the deformation capability of the deformable portion 242 of the centering support 24, the deformable portion 242 may optionally have at least one bend, which is not limited here. In this embodiment, the outer connecting portion 241, the deformable portion 242, and the inner connecting portion 243 of the centering support 24 may be an integrally formed structure.

[0118] In this embodiment, as Figures 2 to 4 , Figures 6 to 8 As shown, by setting two centering supports 24, the two centering supports 24 are respectively set at both ends of the sound-generating device 100 along the second direction. In this way, the two centering supports 24 are set on the short axis of the sound-generating device 100, reducing the volume occupied, thereby avoiding the centering supports 24 occupying the volume of the long axis of the sound-generating device 100, thus ensuring the volume of the magnetic circuit system 3.

[0119] Optionally, such as Figure 4 As shown, the inner connecting portion 243 of the centering support 24 is connected to the first short side 222, for example, the inner connecting portion 243 is connected to the outer surface of the first short side 222. Of course, in other embodiments, the inner connecting portion 243 of the centering support 24 is connected to the first connecting wall 232, for example, the inner connecting portion 243 is connected to the second segment 2322, which is not limited here.

[0120] In one embodiment, the magnetic circuit assembly 32 includes a first magnet 321 and a magnetic guide plate 322 stacked along a first direction, with the first magnet 321 connected to the base plate 311.

[0121] In this embodiment, as Figures 3 to 6As shown, the first magnet 321 and the magnetic guide plate 322 of the magnetic circuit assembly 32 are stacked along the first direction, and the first magnet 321 of the magnetic circuit assembly 32 is connected to the magnetic yoke 31, that is, the first magnet 321 is connected to the base plate 311 of the magnetic yoke 31. In this way, the magnetic circuit assembly 32 can be connected and fixed, and the first magnet 321 can form a magnetic circuit with the base plate 311, side plate 312 and magnetic guide plate 322 of the magnetic yoke 31, so that the magnetic field lines of the magnetic circuit are concentrated through the magnetic guide plate 322 and pass through the voice coil 22.

[0122] Understandably, the magnetic circuit assembly 32 is provided with a clearance groove 323 corresponding to the second connecting wall 233. For example... Figure 6 As shown, the second connecting wall 233 is bonded to the side and bottom surfaces of the first long straight edge 221. That is, the second connecting wall 233 includes a third segment 2331 and a fourth segment 2332 extending from the third segment 2331 in a third direction. At this time, the third segment 2331 of the second connecting wall 233 includes an inclined segment from the top wall 231 to the top surface of the first long straight edge 221 and a vertical segment extending in a first direction. The inclined segment of the third segment 2331 is used to avoid the folded ring portion 2112. The vertical segment of the third segment 2331 is connected to the side surface of the first long straight edge 221, and the fourth segment 2332 is connected to the bottom surface of the first long straight edge 221.

[0123] Optionally, the magnetic guide plate 322 of the magnetic circuit assembly 32 is provided with a clearance groove 323 corresponding to the second connecting wall 233. Alternatively, both the first magnet 321 and the magnetic guide plate 322 of the magnetic circuit assembly 32 are provided with clearance grooves 323 corresponding to the second connecting wall 233. In this way, the clearance grooves 323 can be used to provide clearance space for the second connecting wall 233, thereby avoiding interference between the second connecting wall 233 and the magnetic circuit assembly 32.

[0124] 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.

[0125] Optionally, the electronic device of the present invention can be a portable mobile electronic product such as a mobile phone or tablet, or a wearable device such as a watch, VR, or AR, etc., and is not specifically limited thereto. Of course, the electronic device can also be any other electronic device, etc., and is not limited thereto.

[0126] 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: Metal casing, the metal casing is ring-shaped; A vibration system vibrates along a first direction. The vibration system includes a diaphragm assembly, two voice coils, and two frames. The diaphragm assembly, the two frames, and the two voice coils are arranged along the first direction. The outer periphery of the diaphragm assembly is connected to one end of a metal housing. The two voice coils are spaced apart along a second direction. Each voice coil has two first long straight sides extending along the second direction and two first short sides connecting the two first long straight sides. The two first long straight sides and the two first short sides are connected end-to-end. Each frame connects one voice coil and the diaphragm assembly. Each frame includes a top wall and two first connecting walls that bend and extend from both ends of the top wall along the second direction. The two first connecting walls are respectively connected to the two first short sides of each voice coil. Each first connecting wall includes a first segment extending along the first direction and a second segment that bends and extends along the second direction from the end of the first segment away from the diaphragm assembly. The first segment is connected to the inner surface of the first short side, and the second segment is connected to the bottom surface of the first short side. The first direction and the second direction are perpendicular to each other. A magnetic circuit system, the magnetic circuit system including a magnetic yoke and two magnetic circuit components spaced apart from the magnetic yoke along the second direction, each of the voice coils surrounding one of the magnetic circuit components; The magnetic yoke includes a base plate and a side plate that extends from the periphery of the base plate. Two magnetic circuit assemblies are spaced apart on the base plate along the second direction. The side plate is welded to the end of the metal housing away from the diaphragm assembly.

2. The sound-generating device as described in claim 1, characterized in that, Each of the skeletons further includes two second connecting walls located between the two first connecting walls, the two second connecting walls being respectively connected to the two sides of the top wall along the third direction, and the two second connecting walls being respectively connected to the two first long straight sides of each of the voice coils; The first direction, the second direction, and the third direction are arranged perpendicularly to each other.

3. The sound-generating device as described in claim 2, characterized in that, Each of the second connecting walls includes a third segment and a fourth segment extending in the second direction from the end of the third segment away from the diaphragm assembly, the third segment being connected to the inner surface of the first long straight side, the fourth segment being connected to the bottom surface of the first long straight side, and the fourth segment not exceeding the outer edge of the bottom surface of the first long straight side.

4. The sound-generating device as described in claim 2, characterized in that, The magnetic circuit assembly includes a first magnet and a magnetic plate stacked along the first direction, wherein the first magnet is connected to the base plate; Both the first magnet and the magnetic plate have clearance grooves corresponding to the second connecting wall.

5. The sound-generating device as described in claim 1, characterized in that, The diaphragm assembly includes a diaphragm and a vibrating plate. The diaphragm includes a central part, a folded ring part, and a fixing part connected in sequence. The fixing part is connected to one end of the metal shell, and the vibrating plate is connected to the central part. The vibrating plate is located on the side of the central part facing away from the voice coil, and the top wall is connected to the central part; Alternatively, the diaphragm is located on the side of the central portion facing the voice coil, and the top wall is connected to the diaphragm.

6. The sound-generating device as described in claim 5, characterized in that, Define a third direction that is perpendicular to both the first direction and the second direction; Wherein, the distance between the two first long straight edges is greater than the dimension of the vibrating plate along the third direction; And / or, the dimension of the top wall along the third direction is not greater than the dimension of the vibrating plate along the third direction; And / or, the ratio of the dimension of the top wall along the third direction to the dimension of the vibrating plate along the third direction is 1:2 to 1:1; And / or, the top wall is provided with multiple through holes; wherein, the multiple through holes are irregularly distributed; or, the multiple through holes are arranged in an array.

7. The sound-generating device as claimed in claim 1, characterized in that, The outer wall of the side plate is flush with the outer wall of the metal shell.

8. The sound-generating device as claimed in claim 1, characterized in that, The side plate includes two side plates, each of which is formed by bending and extending the two long sides of the base plate along the second direction. The vibration system further includes two centering supports, which are respectively located at both ends of the sound-generating device along the second direction. The centering support includes an outer connecting part, a deformation part, and an inner connecting part. The outer connecting part is connected to the metal shell, and the inner connecting part is connected to the first short side.

9. The sound-generating device as claimed in claim 1, characterized in that, The sound-generating device has a length along the second direction and a width along the third direction, and the ratio of the length to the width of the sound-generating device is 4:1 to 10:

1. The first direction, the second direction, and the third direction are arranged perpendicularly to each other.

10. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 9.

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