Sound production device and electronic device

Abstract

This invention discloses a sound-generating device and an electronic device, relating to the field of electroacoustic transduction technology. In this sound-generating device, the diaphragm assembly of the vibration system includes a central portion, a bent portion, and a fixing portion connected sequentially. The ratio of the voice coil's dimension along a second direction to its dimension along a third direction is greater than 2. The top wall of the connecting member is connected to the central portion and does not extend beyond its edge. The connecting wall is correspondingly connected to the second short side. The magnetic circuit system includes a magnetic yoke and a magnetic circuit assembly disposed on the yoke. The voice coil is arranged around the magnetic circuit assembly. The projection of the connecting wall along a first direction is located outside the magnetic circuit assembly. The projection of the second long straight side along the first direction is located outside the inner edge of the first long straight side of the bent portion. The connecting wall includes a main body portion corresponding to the top wall and extension portions extending from the main body portion along both sides of the third direction and extending beyond the top wall. 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: A vibration system vibrates along a first direction. The vibration system includes a diaphragm assembly, a voice coil, and a connector. The diaphragm assembly includes a central portion, a bent portion, and a fixed portion connected sequentially. The bent portion has two first long straight sides extending along a second direction and two first short sides connecting the two first long straight sides, with the two first long straight sides and the two first short sides connected end-to-end. The voice coil has two second long straight sides extending along the second direction and two second short sides connecting the two second long straight sides, with the two second long straight sides and the two second short sides connected end-to-end. The ratio of the voice coil's dimension along the second direction to its dimension along a third direction is greater than 2. The connector includes a top wall and a connecting wall bent and extending from the top wall. The top wall connects to the central portion and does not extend beyond the edge of the central portion. The connecting wall corresponds to and connects to the second short sides. The first direction, the second direction, and the third direction are arranged perpendicularly to each other. A magnetic circuit system, the magnetic circuit system including a magnetic yoke and a magnetic circuit assembly disposed on the magnetic yoke, the voice coil being disposed around the magnetic circuit assembly; Wherein, the projection of the connecting wall along the first direction is located on the outside of the magnetic circuit assembly, the projections of the connecting wall and the second short side along the first direction are both located on the inside of the first short side, and the projection of the second long straight side along the first direction is located on the outside of the inner edge of the first long straight side. The connecting wall includes a main body corresponding to the top wall and extensions extending from both sides of the main body and beyond the top wall. The main body is connected to the middle of the second short side, and the extensions are connected to the ends of the second short side.

[0006] In one embodiment, the extension has a notch on the side near the diaphragm assembly to avoid the bend, and the bottom surface of the notch is lower than the lower surface of the top wall; And / or, the portion of the connecting wall that connects to the second short side extends along the second short side, and the outer edges of both ends of the connecting wall do not extend beyond the outer edges of both ends of the second short side.

[0007] In one embodiment, the top wall extends along the second direction, and the connector includes two connecting walls, which are respectively connected to the two ends of the top wall along the second direction.

[0008] In one embodiment, the top wall is provided with a plurality of through holes; The multiple through holes are spaced apart. Alternatively, multiple through holes may be arranged in an array along the second direction.

[0009] In one embodiment, the diaphragm assembly includes a diaphragm and a vibrating plate. The diaphragm includes a central portion, a bent portion, and a fixed portion connected in sequence. The vibrating plate is connected to the central portion so that the vibrating plate and the central portion form the intermediate 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, the connecting wall includes a first segment extending along the first direction and a second segment extending along the second direction from the end of the first segment away from the diaphragm assembly, the second segment being connected to the top surface of the second short side.

[0011] In one embodiment, the connecting wall further includes a third segment extending along the first direction from one end of the second segment away from the first segment, the third segment being connected to the sidewall of the second short side.

[0012] In one embodiment, the connecting wall includes a fourth segment extending along the first direction and a support wall extending from the fourth segment by bending along the second direction, the fourth segment being connected to the side wall of the second short side and the support wall being connected to the bottom surface of the second short side.

[0013] In one embodiment, the sound-generating device further includes a housing, one end of which is connected to the magnetic yoke, and the other end of which is connected to the fixing part; The vibration system further includes two elastic supports, which are respectively located at both ends of the sound-generating device along the second direction. The elastic support includes an outer connecting part, a deformable part, and an inner connecting part. The outer connecting part is connected to the outer shell, and the inner connecting part is connected to the second short side and / or the connecting wall.

[0014] In one embodiment, the connecting wall has a vertical segment that connects to the outer wall of the second short side; The inner connecting portion is connected to the end of the vertical segment; or, the connecting wall further has an edge portion that extends from the vertical segment along the second direction by bending, and the inner connecting portion is connected to the edge portion.

[0015] In one embodiment, the bent portion has a centerline position, and the portion of the first long straight edge located outside the centerline position at least partially overlaps with the projection of the second long straight edge along the first direction; Wherein, the projection of the second long straight edge along the first direction is located outside the centerline position; And / or, the projection of the second long straight edge along the first direction is located inside the outer edge of the first long straight edge.

[0016] In one embodiment, the magnetic yoke includes a base plate and a side plate that extends from the periphery of the base plate, the magnetic circuit assembly is disposed on the base plate and spaced apart from the side plate to form a magnetic gap, and the voice coil is located within the magnetic gap.

[0017] 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; And / or, the magnetic circuit assembly includes a first magnet, a magnetic guide plate, and a second magnet stacked along the first direction, the second magnet being connected to the base plate; wherein, along the second direction or the third direction, at least a portion of the voice coil is opposite to the magnetic guide plate; and / or, the first magnet and the second magnet are both magnetized along the first direction but in opposite directions.

[0018] The present invention also proposes an electronic device, which includes the sound-generating device described above.

[0019] The sound-generating device of this invention comprises a diaphragm assembly, a voice coil, and a connector, wherein the connector connects the voice coil to the diaphragm assembly, and the magnetic circuit system comprises a magnetic yoke and a magnetic circuit assembly disposed on the yoke, such that the voice coil is arranged around the magnetic circuit assembly. Thus, the voice coil vibrates along a first direction under the magnetic field of the magnetic circuit system, thereby driving the diaphragm assembly to vibrate along the first direction and generate sound through the connector. Simultaneously, the diaphragm assembly is configured as a middle section, a bent section, and a fixed section connected in sequence, such that the bent section of the diaphragm assembly has two first long straight sides extending along a second direction and two first short sides connecting the two first long straight sides. The long straight side and two first short sides are connected end to end, and the voice coil 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 two second short sides are connected end to end, and the ratio of the dimension of the voice coil along the second direction to the dimension of the voice coil along the third direction is set to be greater than 2, that is, the length-to-width ratio of the voice coil is greater than 2. In this way, the top wall of the connector is connected to the middle part of the diaphragm assembly without exceeding the edge of the middle part. The connecting wall of the connector is connected to the second short side of the voice coil, and the projections of the connecting wall and the second short side of the voice coil along the first direction are both located inside the first short side of the bent part, so that the voice coil is both The connection can be achieved with the diaphragm assembly via the connecting wall of the connector, ensuring that the connecting wall of the connector and the second short side of the voice coil do not interfere with the bent portion of the diaphragm assembly. Simultaneously, the projection of the second long straight side of the voice coil along the first direction is located outside the inner edge of the first long straight side of the bent portion, thus preventing interference between the second long straight side of the voice coil and the bent portion of the diaphragm assembly. Furthermore, the width between the two second long straight sides of the voice coil along the third direction is increased, and the projection of the connecting wall along the first direction is located outside the magnetic circuit assembly. This ensures that when the voice coil is arranged around the magnetic circuit assembly, the connecting wall of the connector will not interfere with the magnetic circuit assembly, and also avoids connection issues. The connecting wall occupies the dimension of the second longest straight side of the voice coil, thus avoiding the reduction in volume of the magnetic circuit system to avoid the connecting wall. This ensures an increase in the dimension between the two second longest straight sides of the voice coil, while also increasing the dimension of the magnetic circuit assembly along the third direction, thereby increasing the magnet volume, improving the BL value, and thus improving acoustic performance. Furthermore, by setting the connecting wall as a main body corresponding to the top wall and extensions extending from both sides of the main body beyond the top wall, the main body is connected to the middle of the second short side, and the extensions are connected to the ends of the second short side. This effectively increases the connection area between the connecting wall and the second short side of the voice coil, improving connection stability and reliability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A 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 A cross-sectional view along a third direction in one embodiment of the sound-generating device provided by the present invention; Figure 5 An exploded view of an embodiment of the sound-generating device provided by the present invention; Figure 6 A cross-sectional view along the second direction in another embodiment of the sound-generating device provided by the present invention; Figure 7 A cross-sectional schematic diagram along the second direction in another embodiment of the sound-generating device provided by the present invention; Figure 8 This is a partial bottom view schematic diagram of an embodiment of the vibration system provided by the present invention; Figure 9 A partial bottom view of another embodiment of the vibration system provided by the present invention; Figure 10 A partial cross-sectional schematic diagram along the second direction in one embodiment of the vibration system provided by the present invention; Figure 11 for Figure 10 Enlarged view of point A in the middle; Figure 12 This is a partially enlarged cross-sectional schematic diagram of an embodiment of the vibration system provided by the present invention; Figure 13 This is a partially enlarged cross-sectional schematic diagram of another embodiment of the vibration system provided by the present invention; Figure 14 This is a partially enlarged cross-sectional schematic diagram of another embodiment of the vibration system provided by the present invention; Figure 15 A schematic diagram of the structure of an embodiment of the connector provided by the present invention; Figure 16 This is a schematic diagram of another embodiment of the connector provided by the present invention.

[0022] Explanation of icon numbers: 100. Sound-generating device; 1. Housing; 2. Vibration system; 21. Diaphragm assembly; 211. Diaphragm; 2111. Center part; 2112. Middle part; 2113. Bending part; 2114. First long straight side; 2115. First short side; 2116. Centerline position; 2117. Fixing part; 212. Vibrating plate; 22. Voice coil; 221. Second long straight side; 222. Second short side; 23. Connecting part; 231. Top wall; 2311. Through hole; 232. Connecting wall; 2321. First section; 2322 2323, 2324, 2325, Support wall; 2326, Vertical section; 2327, Edge section; 2328, Main body section; 2329, Extension section; 2320, Notch; 24, Elastic support member; 241, External connection section; 242, Deformation section; 243, Internal connection section; 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, Second magnet; 33, Magnetic gap.

[0023] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0026] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0027] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0028] This invention proposes a sound-generating device 100. It is understood that the sound-generating device 100 is applied to electronic devices, such as mobile phones, headphones, smart wearable devices, etc., and is not limited thereto.

[0029] Please refer to the reference. Figures 1 to 16 As shown, in this embodiment of the invention, the sound-generating device 100 includes a vibration system 2 and a magnetic circuit system 3. The vibration system 2 vibrates along a first direction and includes a diaphragm assembly 21, a voice coil 22, and a connector 23. The diaphragm assembly 21 includes a middle portion 2112, a bent portion 2113, and a fixing portion 2117 connected in sequence. The bent portion 2113 has two first long straight sides 2114 extending along a second direction and two first short sides 2115 connecting the two first long straight sides 2114. Two first long straight sides 2114 and two first short sides 2115 are connected end to end. The voice coil 22 has two second long straight sides 221 extending along a second direction and two second short sides 222 connecting the two second long straight sides 221. The two second long straight sides 221 and two second short sides 222 are connected end to end. 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 is greater than 2. The connector 23 includes a top wall 231 and a connecting wall 232 extending from the top wall 231. The top wall 231 is connected to the middle part 2112 and does not extend beyond the edge of the middle part 2112. The connecting wall 232 corresponds to and is connected to the second short side 222. The first direction, the second direction, and the third direction are arranged perpendicularly to each other. The magnetic circuit system 3 includes a magnetic yoke 31 and a magnetic circuit assembly 32 disposed on the magnetic yoke 31. The voice coil 22 is arranged around the magnetic circuit assembly 32. The projection of the connecting wall 232 along the first direction is located outside the magnetic circuit assembly 32. The connecting wall 232 and the second short side The projections of 222 along the first direction are all located inside the first short side 2115, and the projections of the second long straight side 221 along the first direction are located outside the inner edge of the first long straight side 2114; the connecting wall 232 includes a main body 2328 corresponding to the top wall 231 and an extension 2329 extending from the main body 2328 along both sides of the third direction and beyond the top wall 231. The main body 2328 is connected to the middle of the second short side 222, and the extension 2329 is connected to the end of the second short side 222.

[0030] In this embodiment, the sound-generating device 100 can be a single unit of a loudspeaker, and the loudspeaker can be a miniature loudspeaker. It 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.

[0031] 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 the voice coil 22 of the vibration system 2 is connected to the diaphragm assembly 21 via a connector 23, and the other end of the voice coil 22 is suspended within the magnetic gap 33 of the magnetic circuit system 3, so that the voice coil 22 surrounds the magnetic circuit assembly 32. When current is passed into the voice coil 22, the voice coil 22 vibrates within the magnetic field formed by the magnetic circuit system 3, that is, it reciprocates within the magnetic gap 33. This causes the magnetic circuit system 3 to drive the voice coil 22, which in turn drives the connector 23 and the diaphragm assembly 21 to vibrate, thereby producing sound.

[0032] To better assemble the magnetic circuit system 3 and vibration system 2 of the sound-generating device 100, in one embodiment, as... Figures 2 to 7 As shown, the sound-generating device 100 also includes a housing 1, one end of which is connected to the magnetic circuit system 3, and the other end of which 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 housing 1. This makes the diaphragm assembly 21 of the vibration system 2 and the magnetic circuit system 3 arranged opposite to each other.

[0033] It should be noted that the outer 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 outer shell 1 provides a mounting base for components such as the magnetic circuit system 3 and the vibration system 2. It is understood that the outer shell 1 can be a single integral structure or formed by the combination of multiple separate structures; this is not limited here. In this embodiment, the outer shell 1 can be a rectangular or racetrack-shaped frame structure, that is, the outer 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 outer shell 1 and are arranged opposite to each other, so that the magnetic circuit system 3, the outer shell 1, and the diaphragm 211 of the vibration system 2 enclose and form a vibration cavity. Of course, the outer shell 1 can also be other shapes or irregular structures; this is not limited here.

[0034] 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 3 and vibration system 2 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.

[0035] In this embodiment, the outer shell 1 is used to house the fixed vibration system 2 and magnetic circuit system 3, 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 2 and magnetic circuit system 3 of the sound generating unit are installed as multiple independent components on the outer shell 1 of the module structure, which is not limited here.

[0036] Optionally, the sound-generating device 100 is rectangular or racetrack-shaped. In this embodiment, the housing 1 of the sound-generating device 100 is optionally rectangular or racetrack-shaped. To facilitate the connection and assembly of the vibration system 2 and the magnetic circuit system 3 with the housing 1, the outer contours of the vibration system 2 and the magnetic circuit system 3 are optionally rectangular or racetrack-shaped.

[0037] It should be noted that, as Figures 1 to 16 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.

[0038] 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.

[0039] In this embodiment, as Figure 1 , Figures 3 to 16 As shown, by setting the vibration system 2 as a diaphragm assembly 21, a voice coil 22 and a connector 23, the connector 23 connects the voice coil 22 to the diaphragm assembly 21. The magnetic circuit system 3 is set as a magnetic yoke 31 and a magnetic circuit assembly 32 disposed on the magnetic yoke 31, so that a magnetic gap 33 is formed between the magnetic yoke 31 and the magnetic circuit assembly 32. The end of the voice coil 22 away from the diaphragm assembly 21 is suspended in the magnetic gap 33, and the voice coil 22 is arranged around the magnetic circuit assembly 32. Thus, the voice coil 22 vibrates along the first direction under the action of the magnetic field of the magnetic circuit system 3, thereby driving the diaphragm assembly 21 to vibrate along the first direction to produce sound through the connector 23.

[0040] Understandable, such as Figure 1 , Figure 5As 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 central portion 2112, a bent portion 2113, and a fixing portion 2117 connected in sequence. That is, the bent portion 2113 is arranged around the central portion 2112, and the fixing portion 2117 is arranged around the bent portion 2113. The fixing portion 2117 of the diaphragm assembly 21 is connected to one end of the outer shell 1, and the magnetic yoke 31 of the magnetic circuit system 3 is connected to the other end of the outer shell 1.

[0041] It should be noted that the middle portion 2112 of the diaphragm assembly 21 can be either planar or flat, and the plane containing the middle portion 2112 is perpendicular to the first direction. The bent portion 2113 of the diaphragm assembly 21 is the folded ring of the diaphragm assembly 21, and the bent portion 2113 can be a convex structure that protrudes upward along the first direction or a concave structure that is recessed downward, without limitation. The inner edge of the bent portion 2113 is connected to the outer edge of the middle portion 2112, and the outer edge of the bent portion 2113 is connected to the inner edge of the fixing portion 2117. The fixing part 2117 of the diaphragm assembly 21 is used to connect with the housing 1 or the magnetic circuit system 3 or other components. The fixing part 2117 may extend along a plane perpendicular to the first direction to form a planar or flat plate connecting part; or, the fixing part 2117 may extend along the first direction to form a vertical planar or vertical plate connecting part parallel to the first direction; or, the fixing part 2117 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, which is not limited here.

[0042] Optionally, the middle portion 2112, the bent portion 2113, and the fixing portion 2117 of the diaphragm assembly 21 are integrally formed. In this embodiment, the bent portion 2113 is smoothly connected to the middle portion 2112 and the fixing portion 2117 at their respective connection points.

[0043] Optionally, the middle portion 2112, the bent portion 2113, and the fixing portion 2117 are all rectangular or racetrack-shaped. In this embodiment, as... Figure 1 and Figure 5 As shown, the bent portion 2113 has two first long straight sides 2114 extending along the second direction and two first short sides 2115 connecting the two first long straight sides 2114. The two first long straight sides 2114 and the two first short sides 2115 are connected end to end and are arranged around the middle portion 2112.

[0044] It should be noted that the connection between the first long straight side 2114 and the first short side 2115 of the bent portion 2113 can be at right angles to each other. In this case, the two first long straight sides 2114 and the two first short sides 2115 of the bent portion 2113 are connected end to end to form a right-angled rectangular structure, that is, the first long straight side 2114 extends along the second direction and the first short side 2115 extends along the third direction. Of course, for aesthetic reasons, as well as to meet structural strength and process requirements, the connection between the first long straight side 2114 and the first short side 2115 of the bent portion 2113 can also be a rounded corner structure with a smooth transition. In this case, the two first long straight sides 2114 and the two first short sides 2115 of the bent portion 2113 connect end to end to form a rounded rectangle or a racetrack-shaped structure. That is, the first short side 2115 has a first straight segment extending along a third direction and two first arc segments connecting the two ends of the first straight segment. The first long straight side 2114 extends along a second direction and connects to the end of the first arc segment away from the first straight segment. Alternatively, the first short side 2115 can be entirely arc-shaped, which is not limited here.

[0045] Understandably, the voice coil 22 has two second long straight sides 221 extending along the second direction and two second short sides 222 connecting the two second long straight sides 221. The two second long straight sides 221 and the two second 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.

[0046] It should be noted that the connection between the second long straight side 221 and the second short side 222 of the voice coil 22 can be a right angle perpendicular to each other. In this case, the two second long straight sides 221 and the two second short sides 222 of the voice coil 22 are connected end to end to form a right-angled rectangular structure. That is, the second long straight side 221 extends along the second direction, and the second short side 222 extends along the third direction. The aspect ratio of the voice coil 22 is the ratio of the dimension of the second long straight side 221 along the second direction to the dimension of the second short side 222 along the third direction. Of course, for aesthetic reasons, structural strength requirements, and manufacturing specifications, the connection between the second long straight side 221 and the second short side 222 of the voice coil 22 can also be a rounded corner structure with a smooth transition. In this case, the two second long straight sides 221 and the two second short sides 222 of the voice coil 22 connect end to end to form a rounded rectangle or racetrack-shaped structure. That is, the second 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 second 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 second long straight sides 221 along the third direction. Alternatively, the second short side 222 can be entirely arc-shaped, and the aspect ratio of the voice coil 22 is the ratio of the maximum distance between the two second short sides 222 along the second direction to the distance between the two second long straight sides 221 along the third direction. No limitation is made here.

[0047] In this embodiment, as Figures 3 to 16 As shown, by setting the connector 23 as a top wall 231 and a connecting wall 232 that bends and extends from the top wall 231, the top wall 231 of the connector 23 is connected to the middle part 2112, and the connecting wall 232 of the connector 23 is connected to the second short side 222 of the voice coil 22. In this way, the voice coil 22 is connected to the diaphragm assembly 21 through the connector 23. At the same time, by connecting the connecting wall 232 of the connector 23 to the second short side 222 of the voice coil 22, the voice coil 22 can be connected and fixed to the diaphragm assembly 21 through the connector 23, and the connecting wall 232 of the connector 23 can avoid occupying the size of the second long straight side 221 of the voice coil 22. This avoids the magnetic circuit system 3 from reducing its volume to avoid the connecting wall 232, thereby ensuring that the size between the two second long straight sides 221 of the voice coil 22 is expanded, and maximizing the setting size of the magnetic circuit assembly 32. Understandably, by setting the top wall 231 of the connector 23 to not extend beyond the edge of the middle portion 2112, interference between the connector 23 and the bent portion 2113 of the diaphragm assembly 21 is avoided.

[0048] Understandable, such as Figures 3 to 10As shown, by placing the projections of the connecting wall 232 and the second short side 222 of the voice coil 22 along the first direction inside the first short side 2115 of the bend 2113 of the diaphragm assembly 21, the voice coil 22 can be connected to the diaphragm assembly 21 through the connecting wall 232 of the connector 23, while ensuring that the connecting wall 232 of the connector 23 and the second short side 222 of the voice coil 22 do not interfere with the bend 2113 of the diaphragm assembly 21. Furthermore, the projection of the second long straight side 221 of the voice coil 22 along the first direction is located at the inner edge of the first long straight side 2114 of the bend 2113. On the outside, this prevents the second long straight edge 221 of the voice coil 22 from interfering with the bent portion 2113 of the diaphragm assembly 21. At the same time, it increases the width between the two second long straight edges 221 of the voice coil 22 along the third direction, and the projection of the connecting wall 232 along the first direction is located outside the magnetic circuit assembly 32. This ensures that when the voice coil 22 is arranged around the magnetic circuit assembly 32, the connecting wall 232 of the connector 23 will not interfere with the magnetic circuit assembly 32. At the same time, it can increase the size of the magnetic circuit assembly 32 along the third direction, thereby increasing the magnet volume, improving the BL value, and thus improving the acoustic performance of the sound-generating device 100.

[0049] In this embodiment, when space is limited, the voice coil 22 of the sound-generating device 100 is connected to the diaphragm assembly 21 via the connector 23, such that the projections of the second short side 222 of the voice coil 22 and the connecting wall 232 of the connector 23 along the first direction are both located inside the first short side 2115 of the bent portion 2113 of the diaphragm assembly 21, and the projection of the second long straight side 221 of the voice coil 22 along the first direction is located outside the inner edge of the first long straight side 2114 of the bent portion 2113, thus expanding the two second long straight sides 222 of the voice coil 22. The width between 21 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 part 2112 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.

[0050] Understandable, such as Figure 4 , Figures 11 to 16As shown, by setting the connecting wall 232 as a main body 2328 corresponding to the top wall 231 and an extension 2329 extending from the main body 2328 along both sides in a third direction and beyond the top wall 231, the main body 2328 is connected to the middle of the second short side 222, and the extension 2329 is connected to the end of the second short side 222. This can effectively increase the connection area between the connecting wall 232 and the second short side 222 of the voice coil 22, and improve the connection stability and reliability between the connector 23 and the voice coil 22.

[0051] It should be noted that the main body 2328 of the connecting wall 232 and the two extensions 2329 located on both sides of the main body 2328 are arranged along a third direction, that is, one extension 2329, the main body 2328 and the other extension 2329 are connected and arranged sequentially along a third direction. If the voice coil 22 has a right-angled rectangular structure, that is, the connection between the second long straight side 221 and the second short side 222 of the voice coil 22 is at a right angle to each other, then the main body 2328 and the two extensions 2329 (that is, one extension 2329, the main body 2328 and the other extension 2329) of the connecting wall 232 are connected and arranged sequentially along a third direction, and are all connected to the second short side 222. At this time, the main body 2328 is connected to the middle of the second short side 222, and the extension 2329 is connected to the end of the second short side 222. If the voice coil 22 has a rounded rectangular structure, that is, the connection between the second long straight side 221 and the second short side 222 of the voice coil 22 has a rounded corner with a rounded transition, then the main body 2328 of the connecting wall 232 is connected to the middle part of the second short side 222, and the two extensions 2329 are connected to the ends of the second short side 222 respectively. The extensions 2329 are extended along the rounded corner with a rounded transition of the voice coil 22, which is not limited here.

[0052] In one embodiment, the extension 2329 has a notch 2320 on the side near the diaphragm assembly 21 to avoid the bending portion 2113, and the bottom surface of the notch 2320 is lower than the lower surface of the top wall 231.

[0053] In this embodiment, as Figure 4 , Figures 11 to 16 As shown, by providing a notch 2320 on the side of the extension 2329 near the diaphragm assembly 21, the bottom surface of the notch 2320 is lower than the lower surface of the top wall 231. In this way, the notch 2320 avoids the bend 2113, thereby further preventing the connecting wall 232 of the connector 23 from interfering with the bend 2113.

[0054] Understandably, the notch 2320 extends through the extension 2329 from the side closest to the main body 2328 along the extension direction of the extension 2329. For example, for a right-angled rectangular voice coil 22, the notch 2320 extends through the extension 2329 from the side closest to the main body 2328 along a third direction.

[0055] In one embodiment, the portion of the connecting wall 232 that connects to the second short side 222 extends along the second short side 222, and the outer edges of both ends of the connecting wall 232 do not extend beyond the outer edges of both ends of the second short side 222.

[0056] In this embodiment, as Figure 4 , Figure 5 , Figure 8 and Figure 9 As shown, by extending the connecting wall 232 along the second short side 222 and controlling the outer edges of both ends of the connecting wall 232 not to extend beyond the outer edges of both ends of the second short side 222, that is, between the outer walls of the two second long straight sides 221 of the voice coil 22, it is ensured that the connecting wall 232 is connected to the second short side 222 of the voice coil 22, thus preventing the connecting wall 232 from extending to the second long straight side 221 of the voice coil 22, and preventing the magnetic circuit assembly 32 of the magnetic circuit system 3 from reducing its volume in order to avoid the connecting wall 232 connected to the second long straight side 221.

[0057] Understandably, if the voice coil 22 has a right-angled rectangular structure, the extension length of the connecting wall 232 along the third direction is less than the length between the outer walls of the two second long straight sides 221. If the voice coil 22 has a rounded rectangular structure, the connecting wall 232 includes a third straight segment extending along the third direction and two third arc-shaped segments connecting the two ends of the third straight segment. In this case, the third straight segment of the connecting wall 232 is connected to the second straight segment of the second short side 222, and the two third arc-shaped segments of the connecting wall 232 are connected to the two second arc-shaped segments of the second short side 222, respectively. Optionally, the distance between the ends of the two third arc-shaped segments of the connecting wall 232 is less than the length between the outer walls of the two second long straight sides 221.

[0058] In one embodiment, the bent portion 2113 has a centerline position 2116, and the portion of the first long straight edge 2114 located outside the centerline position 2116 at least partially overlaps with the projection of the second long straight edge 221 along the first direction.

[0059] In this embodiment, as Figure 4 As shown, the centerline position 2116 of the bent portion 2113 is the midpoint of the line connecting the inner edge and the outer edge of the bent portion 2113. The first long straight edge 2114 of the bent portion 2113 has a first portion located outside the centerline position 2116 and a second portion located inside the centerline position 2116.

[0060] Understandably, by at least partially overlapping the projection of the second long straight edge 221 of the voice coil 22 along the first direction with the projection of the portion of the first long straight edge 2114 of the bent portion 2113 located outside the centerline position 2116 along the first direction, that is, by at least partially overlapping the projection of the second long straight edge 221 of the voice coil 22 along the first direction with the projection of the first portion of the first long straight edge 2114 located outside the centerline position 2116 along the first direction, the width between the two second long straight edges 221 of the voice coil 22 is widened. 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 part 2112 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 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.

[0061] Optionally, the projection of the second long straight side 221 along the first direction is located outside the centerline position 2116. In this embodiment, as... Figure 4 As shown, the projection of the second long straight edge 221 of the voice coil 22 along the first direction is located on the outer side of the center line position 2116 along the first direction, that is, on the side of the center line position 2116 facing the fixing part 2117.

[0062] Optionally, the projection of the second long straight side 221 along the first direction is located inside the outer edge of the first long straight side 2114. In this embodiment, as... Figure 4 As shown, the projection of the second long straight edge 221 along the first direction is located inside the outer edge of the first long straight edge 2114 of the bent portion 2113, that is, the projection of the second long straight edge 221 along the first direction does not coincide with the projection of the fixed portion 2117 along the first direction.

[0063] In this embodiment, as Figure 4 As shown, the projection of the second long straight edge 221 of the voice coil 22 along the first direction is located outside the centerline position 2116, and the projection of the second long straight edge 221 along the first direction is located inside the outer edge of the first long straight edge 2114. That is, the projection of the second long straight edge 221 of the voice coil 22 along the first direction is located in the first part of the first long straight edge 2114.

[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 bending portion 2113 and a fixing portion 2117 connected in sequence. The vibrating plate 212 is connected to the central portion 2111 so that the vibrating plate 212 and the central portion 2111 form an intermediate portion 2112.

[0065] In this embodiment, as Figure 1 , Figures 3 to 7 As shown, the central portion 2111, the bending portion 2113, and the fixing portion 2117 of the diaphragm 211 can be an integrally molded structure. 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, that is, the central portion 2111 has a perforation, which can reduce the weight of the diaphragm assembly 21. It can be understood that by setting the vibrating plate 212, the vibrating plate 212 is connected to the central portion 2111, so that the vibrating plate 212 and the central portion 2111 form an intermediate portion 2112, thus the vibrating plate 212 can be used to strengthen the structural strength of the central portion 2111 of the diaphragm 211.

[0066] 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 connector 23 is connected to the center portion 2111.

[0067] 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 connector 23 is connected to the diaphragm 212.

[0068] It should be noted that the number of connectors 23 can be one or more. For example... Figure 3 , Figure 4 , Figure 5 , Figure 8 , Figure 10 , Figure 15 and Figure 16 As shown, when there is only one connector 23, the connector 23 includes a top wall 231 and two connecting walls 232. When there are multiple connectors 23, each second short side 222 of the voice coil 22 corresponds to one connector 23, and the connector 23 includes a top wall 231 and a connecting wall 232.

[0069] Understandably, the number of voice coils 22 can be one or more. The number of voice coils 22 can be the same as or different from the number of connectors 23. For example... Figures 3 to 6 , Figure 8 , Figures 10 to 16 As shown, when there is one voice coil 22, the number of connectors 23 can be one or two. When there are N voice coils 22, N≥2, the number of connectors 23 is the same as the number of voice coils 22, that is, the number of connectors 23 is N, as shown. Figure 7 and Figure 9 As shown; or, the number of connectors 23 is greater than the number of voice coils 22, in which case the number of connectors 23 is N+1 or N+2, which is not limited here.

[0070] It should be noted that the number of voice coils 22 can be the same as or different from the number of magnetic circuit components 32 in the magnetic circuit system 3. When there is one voice coil 22, the number of magnetic circuit components 32 can be one or more. For example... Figure 3 , Figure 5 As shown, if there is only one magnetic circuit component 32, then the voice coil 22 is arranged around the magnetic circuit component 32; as Figure 6 As shown, if there are multiple magnetic circuit components 32, these components are arranged at intervals or connected together along the second direction, and each magnetic circuit component 32 extends along the second direction, with the voice coil 22 surrounding the multiple magnetic circuit components 32. Figure 7 As shown, when the number of voice coils 22 is N, N≥2, the number of magnetic circuit components 32 is the same as the number of voice coils 22, that is, the number of magnetic circuit components 32 is N. At this time, each voice coil 22 is arranged around a magnetic circuit component 32; or, the number of magnetic circuit components 32 is greater than the number of voice coils 22. At this time, each voice coil 22 corresponds to one or more magnetic circuit components 32, which is not limited here.

[0071] In one embodiment, there is one connector 23, the top wall 231 extends along the second direction, and the connector 23 includes two connecting walls 232, which are respectively connected to the two ends of the top wall 231 along the second direction.

[0072] In this embodiment, the top wall 231 of the connector 23 extends along the second direction and connects to the middle portion 2112. The two connecting walls 232 of the connector 23 are respectively connected to the two ends of the top wall 231 along the second direction, such that each connecting wall 232 is correspondingly connected to a second short side 222 of the voice coil 22. This arrangement allows for the connection of the two connecting walls 232 to the two second short sides 222 of the voice coil 22, and also increases the connection area between the top wall 231 and the middle portion 2112, improving connection stability. Optionally, the top wall 231 is located between the two second short sides 222.

[0073] It is understandable that the dimension of the top wall 231 of the connector 23 extending along the second direction may be less than the distance between the two second short sides 222; or, the dimension of the top wall 231 of the connector 23 extending along the second direction may be greater than the distance between the two second short sides 222; or, the dimension of the top wall 231 of the connector 23 extending along the second direction may be equal to the distance between the two second short sides 222, which is not limited here.

[0074] In one embodiment, the top wall 231 is provided with a plurality of through holes 2311. In this embodiment, as shown... Figure 16 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 2112 can be ensured to improve the connection stability.

[0075] Optionally, multiple through holes 2311 are spaced apart. In this embodiment, as shown... Figure 16 As shown, multiple through holes 2311 are arranged in an array along the second direction.

[0076] In one embodiment, the connecting wall 232 includes a first segment 2321 extending in a first direction and a second segment 2322 extending in a second direction from the end of the first segment 2321 away from the diaphragm assembly 21, the second segment 2322 being connected to the top surface of the second short side 222.

[0077] In this embodiment, by setting the connecting wall 232 as a first segment 2321 and a second segment 2322, the first segment 2321 extends along a first direction, and the second segment 2322 is formed by bending and extending the first segment 2321 away from the diaphragm assembly 21 along a second direction. In this way, the first segment 2321 is used to support the voice coil 22 away from the diaphragm assembly 21, avoiding interference between the voice coil 22 and the bent portion 2113 of the diaphragm assembly 21. For example, the second segment 2322 is connected to the top surface of the second short side 222, so that the voice coil 22 is connected and fixed to the diaphragm assembly 21 through the connector 23.

[0078] 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.

[0079] Understandably, the second segment 2322 can be formed by bending and extending the end of the first segment 2321 away from the diaphragm assembly 21 in the second direction toward the inside or outside. The inside of the first segment 2321 is the side facing the inner surface of the voice coil 22, and the outside of the first segment 2321 is the side facing the outer surface of the voice coil 22.

[0080] Optionally, the connecting wall 232 and the second short side 222 of the voice coil 22 are connected by adhesive. In this embodiment, the second segment 2322 of the connecting wall 232 is bonded to the top surface of the second short side 222, but this is not limited to this.

[0081] Optionally, the first segment 2321 and the second segment 2322 of the connecting wall 232 are integrally formed structures. It is understood that the first segment 2321 and the second segment 2322 of the connecting wall 232 can be integrally stretched or integrally injection molded, and no limitation is made here.

[0082] It should be noted that the first segment 2321 and the second segment 2322 of the connecting wall 232 are connected and arranged sequentially along the first direction. That is, both the main body 2328 and the extension 2329 of the connecting wall 232 include the first segment 2321 and the second segment 2322 along the first direction. Similarly, the first segment 2321 and the second segment 2322 of the connecting wall 232 both include the main body 2328 and the extension 2329 along the third direction, which is not limited here.

[0083] In another embodiment, the connecting wall 232 further includes a third segment 2323 extending in a first direction from one end of the second segment 2322 away from the first segment 2321, and the third segment 2323 is connected to the sidewall of the second short side 222.

[0084] In this embodiment, as Figure 3 , Figure 5 , Figure 10 , Figure 11 , Figure 15 and Figure 16 As shown, by setting the connecting wall 232 as a first segment 2321, a second segment 2322, and a third segment 2323 connected in sequence, the connecting wall 232 supports the voice coil 22 away from the diaphragm assembly 21 through the first segment 2321. The second segment 2322 and the third segment 2323 are both connected to the second short side 222 of the voice coil 22, that is, the second segment 2322 is connected to the top surface of the second short side 222, and the third segment 2323 is connected to the side surface of the second short side 222. This effectively increases the connection area, thereby improving the connection strength and stability.

[0085] Optionally, the first segment 2321, the second segment 2322, and the third segment 2323 of the connecting wall 232 are integrally formed structures. It is understood that the first segment 2321, the second segment 2322, and the third segment 2323 of the connecting wall 232 can be integrally stretched or integrally injection molded, and no limitation is made here.

[0086] It should be noted that when the second segment 2322 is the end of the first segment 2321 that is away from the diaphragm assembly 21, bent inward along the second direction, the third segment 2323 is connected to the inner surface of the second short side 222 of the voice coil 22. For example... Figure 3 , Figure 5 , Figure 10 , Figure 11 , Figure 15 and Figure 16 As shown, when the second segment 2322 is the end of the first segment 2321 that is away from the diaphragm assembly 21 and bends outward along the second direction, the third segment 2323 is connected to the outer side of the second short side 222 of the voice coil 22, which is not limited here.

[0087] Understandably, the first segment 2321, the second segment 2322, and the third segment 2323 of the connecting wall 232 are sequentially connected and arranged along the first direction. That is, the main body 2328 and the extension 2329 of the connecting wall 232 both include the first segment 2321, the second segment 2322, and the third segment 2323 along the first direction. Similarly, the first segment 2321, the second segment 2322, and the third segment 2323 of the connecting wall 232 both include the main body 2328 and the extension 2329 along the third direction, which is not limited here.

[0088] In another embodiment, the connecting wall 232 includes a fourth segment 2324 extending along a first direction and a support wall 2325 extending from the fourth segment 2324 by bending along a second direction. The fourth segment 2324 is connected to the side wall of the second short side 222, and the support wall 2325 is connected to the bottom surface of the second short side 222.

[0089] In this embodiment, as Figure 6 , Figure 12 , Figure 13 As shown, by setting the connecting wall 232 as a fourth segment 2324 and a support wall 2325, the fourth segment 2324 is connected to the side wall of the second short side 222, and the support wall 2325 is connected to the bottom surface of the second short side 222. This can effectively increase the connection area between the connecting wall 232 and the second short side 222 of the voice coil 22, thereby improving the connection stability and firmness.

[0090] Understandable, such as Figure 13 As shown, the fourth segment 2324 of the connecting wall 232 can be connected to the inner surface of the second short side 222; or, as shown... Figure 12 As shown, the fourth segment 2324 of the connecting wall 232 can be connected to the outer surface of the second short side 222, which is not limited here.

[0091] Optionally, the fourth segment 2324 of the connecting wall 232 and the supporting wall 2325 are integrally formed structures. It is understood that the fourth segment 2324 of the connecting wall 232 and the supporting wall 2325 can be integrally stretched or integrally injection molded, and no limitation is made here.

[0092] It should be noted that the fourth segment 2324 of the connecting wall 232 and the supporting wall 2325 are connected and arranged sequentially along the first direction. That is, both the main body 2328 and the extension 2329 of the connecting wall 232 include the fourth segment 2324 and the supporting wall 2325 along the first direction. Similarly, both the fourth segment 2324 of the connecting wall 232 and the supporting wall 2325 include the main body 2328 and the extension 2329 along the third direction, which is not limited here.

[0093] In another embodiment, the connecting wall 232 has a vertical section 2326 connected to the outer wall of the second short side 222 and an edge portion 2327 extending from the vertical section 2326 in a second direction.

[0094] In this embodiment, as Figure 14 As shown, by setting the connecting wall 232 as a vertical section 2326 and an edge portion 2327, the vertical section 2326 is connected to the outer wall of the second short side 222, and the edge portion 2327 is bent and extended from the vertical section 2326 in the second direction away from the second short side 222. In this way, the edge portion 2327 is connected and fixed to a structure such as a centering support or an elastic support, thereby increasing the connection area and improving the connection stability.

[0095] Optionally, the vertical section 2326 and the edge portion 2327 of the connecting wall 232 are integrally formed. It is understood that the vertical section 2326 and the edge portion 2327 of the connecting wall 232 can be integrally stretched or integrally injection molded, and there is no limitation here.

[0096] It should be noted that the vertical segment 2326 and the edge portion 2327 of the connecting wall 232 are connected and arranged sequentially along the first direction. That is, the main body portion 2328 and the extension portion 2329 of the connecting wall 232 both include the vertical segment 2326 and the edge portion 2327 along the first direction. Similarly, the vertical segment 2326 and the edge portion 2327 of the connecting wall 232 both include the main body portion 2328 and the extension portion 2329 along the third direction, which is not limited here.

[0097] In one embodiment, the sound-generating device 100 further includes a housing 1, one end of which is connected to a magnetic yoke 31, and the other end of which is connected to a fixing part 2117; the vibration system 2 further includes an elastic support member 24, which includes two elastic support members 24, which are respectively disposed at both ends of the sound-generating device 100 along the second direction; wherein, the elastic support member 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 housing 1, and the inner connecting part 243 is connected to the second short side 222 and / or the connecting wall 232.

[0098] In this embodiment, as Figures 2 to 7 As shown, the outer shell 1 can be a plastic shell or a metal shell. To reduce the volume occupied by the outer shell 1, it can be selected as a metal shell. It is understood that by setting the outer shell 1 as a metal shell, since the wall thickness of the metal shell can be made thinner while maintaining the corresponding structural strength, the cavity structure inside the outer shell 1 can be effectively increased within the same size, thereby correspondingly increasing the volume of the magnetic circuit system 3, so as to improve the magnetic field strength, improve the BL value, and thus improve the acoustic performance.

[0099] Understandable, such as Figure 2 , Figure 3 , Figures 5 to 14 As shown, by setting the elastic support member 24, the outer connecting part 241 of the elastic support member 24 is connected to the outer shell 1, and the inner connecting part 243 is connected to the second short side 222 and / or the connecting wall 232. In this way, the elastic support member 24 is used to center the voice coil 22.

[0100] In this embodiment, the outer connecting part 241 of the elastic support 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 elastic support 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 elastic support 24 can both center the voice coil 22 and connect the voice coil 22 to the external circuit.

[0101] Understandably, the elastic support 24 can be selected as a centering support. The deformable portion 242 of the elastic support 24 can deform during the vibration of the voice coil 22. To ensure the deformability of the deformable portion 242 of the elastic 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 elastic support 24 can be selected as an integrally formed structure.

[0102] In this embodiment, as Figure 2 , Figure 3 , Figures 5 to 14 As shown, by setting two elastic support members 24, the two elastic support members 24 are respectively set at both ends of the sound generating device 100 along the second direction. In this way, the two elastic support members 24 are set on the short axis of the sound generating device 100, reducing the volume occupied, thereby avoiding the elastic support members 24 occupying the volume of the long axis of the sound generating device 100, thus ensuring the volume of the magnetic circuit system 3.

[0103] Optionally, such as Figure 8 , Figure 9 , Figure 13 As shown, the inner connecting portion 243 of the elastic support 24 is connected to the second short side 222; or, as... Figure 12 As shown, the inner connecting portion 243 of the elastic support 24 is connected to the connecting wall 232; or, as... Figure 11 , Figure 14 As shown, the inner connecting part 243 of the elastic support member 24 is connected to the second short side 222 and the connecting wall 232, which is not limited here.

[0104] In one implementation, such as Figure 11 As shown, the connecting wall 232 has a vertical segment 2326 connected to the outer wall of the second short side 222, and the inner connecting portion 243 is connected to the end of the vertical segment 2326. Of course, in other embodiments, such as... Figure 14As shown, the connecting wall 232 also has an edge portion 2327 that extends from the vertical segment 2326 in a second direction. The inner connecting portion 243 is connected to the edge portion 2327, which can further increase the connection area between the inner connecting portion 243 and the connecting wall 232, and improve the connection stability and reliability. This is not limited here.

[0105] In one embodiment, the magnetic yoke 31 includes a base plate 311 and a side plate 312 that extends from the periphery of the base plate 311. The magnetic circuit assembly 32 is disposed on the base plate 311 and forms a magnetic gap 33 with the side plate 312 at intervals. The voice coil 22 is located within the magnetic gap 33.

[0106] In this embodiment, as Figure 4 and Figure 5 As shown, by setting the magnetic yoke 31 as a base plate 311 and a side plate 312, the magnetic circuit assembly 32 is set on the base plate 311 and forms a magnetic gap 33 with the side plate 312. This makes it convenient for the voice coil 22 to be located in the magnetic gap 33, thereby using the magnetic circuit assembly 32 of the magnetic circuit system 3 to form a magnetic field, and forming a magnetic circuit with the base plate 311 and the side plate 312 of the magnetic yoke 31 to pass through the voice coil 22 in the magnetic gap 33, thereby ensuring the driving force of the magnetic circuit system 3 on the voice coil 22.

[0107] It is understood that the base plate 311 and side plate 312 of the magnetic yoke 31 can be selected as an integrally formed structure. In this embodiment, the base plate 311 and side plate 312 are formed by integral stretching molding, which is not limited here. One end of the outer shell 1 is connected to the side plate 312, and the other end of the outer shell 1 is connected to the outer periphery of the diaphragm assembly 21. Optionally, the outer shell 1 is welded to the side plate 312 of the magnetic yoke 31. Of course, in other embodiments, the outer shell 1 and the side plate 312 of the magnetic yoke 31 can also be bonded together, which is not limited here.

[0108] 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.

[0109] In this embodiment, as Figure 4 and Figure 5 As shown, the outer 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 side wall of the outer casing 1 is flush with the outer side wall of the side plate 312. This ensures both the aesthetic appearance of the sound-generating device 100 and the structural strength of the outer casing 1 within the same dimensions, while maximizing the internal volume of the outer casing 1, thereby increasing the volume of the magnetic circuit system 3.

[0110] 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 magnetic circuit assembly 32. Since the aspect ratio of the voice coil 22 is greater than 2, that is, the dimensions of the two second long straight sides 221 of the voice coil 22 are much larger than the dimensions of the two second short sides 222 of the voice coil 22. This allows the two second long straight sides 221 to be placed as close as possible within the magnetic gaps 33 formed by the magnetic circuit assembly 32 and the two side plates 312, thereby subjecting the two second long straight sides 221 to a stronger magnetic field, thus increasing the driving force on the voice coil 22. Since the dimensions of the two second short sides 222 are small, the driving force from the magnetic field is limited.

[0111] In one embodiment, the magnetic circuit assembly 32 includes a first magnet 321, a magnetic guide plate 322 and a second magnet 323 stacked along a first direction, with the second magnet 323 connected to the base plate 311.

[0112] In this embodiment, as Figures 3 to 7 As shown, the first magnet 321, the magnetic guide plate 322, and the second magnet 323 of the magnetic circuit assembly 32 are stacked along the first direction, and the second magnet 323 of the magnetic circuit assembly 32 is connected to the magnetic yoke 31, that is, the second magnet 323 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 second magnet 323 can form a magnetic circuit with the base plate 311, the side plate 312, and the magnetic guide plate 322 of the magnetic yoke 31, and the first magnet 321 can form another magnetic circuit with the magnetic guide plate 322 and the side plate 312. The magnetic field lines of the two magnetic circuits can be concentrated through the magnetic guide plate 322 and pass through the voice coil 22.

[0113] Optionally, at least a portion of the voice coil 22 is opposite to the magnetic plate 322 along a plane perpendicular to the first direction. In this embodiment, as... Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, at least a portion of the voice coil 22 is opposite to the magnetic plate 322 along the second or third direction. This arrangement ensures that more magnetic field lines pass through the voice coil 22, thereby increasing the driving force on the voice coil 22 and improving the BL value.

[0114] In this embodiment, as Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, the first magnet 321 and the second magnet 323 are both magnetized along the first direction but in opposite directions. This arrangement causes the magnetic circuit assembly 32 to form a magnetic pair structure, that is, the first magnet 321 and the second magnet 323 form a magnetic pair structure. At this time, a relatively long magnetic field region with a more uniform magnetic field distribution is formed between the first magnet 321 and the second magnet 323 in the first direction, making the magnetic field lines more dense and uniform. When the voice coil 22 reciprocates along the first direction, it can be in the dense magnetic field line region, thereby making the BLx curve flatter and reducing distortion.

[0115] 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.

[0116] 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.

[0117] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that, The sound-generating device includes: A vibration system vibrates along a first direction. The vibration system includes a diaphragm assembly, a voice coil, and a connector. The diaphragm assembly includes a central portion, a bent portion, and a fixed portion connected sequentially. The bent portion has two first long straight sides extending along a second direction and two first short sides connecting the two first long straight sides, with the two first long straight sides and the two first short sides connected end-to-end. The voice coil has two second long straight sides extending along the second direction and two second short sides connecting the two second long straight sides, with the two second long straight sides and the two second short sides connected end-to-end. The ratio of the voice coil's dimension along the second direction to its dimension along a third direction is greater than 2. The connector includes a top wall and a connecting wall bent and extending from the top wall. The top wall connects to the central portion and does not extend beyond the edge of the central portion. The connecting wall corresponds to and connects to the second short sides. The first direction, the second direction, and the third direction are arranged perpendicularly to each other. A magnetic circuit system, the magnetic circuit system including a magnetic yoke and a magnetic circuit assembly disposed on the magnetic yoke, the voice coil being disposed around the magnetic circuit assembly; Wherein, the projection of the connecting wall along the first direction is located on the outside of the magnetic circuit assembly, the projections of the connecting wall and the second short side along the first direction are both located on the inside of the first short side, and the projection of the second long straight side along the first direction is located on the outside of the inner edge of the first long straight side. The connecting wall includes a main body corresponding to the top wall and extensions extending from both sides of the main body and beyond the top wall. The main body is connected to the middle of the second short side, and the extensions are connected to the ends of the second short side.

2. The sound-generating device as described in claim 1, characterized in that, The extension has a notch on the side near the diaphragm assembly to avoid the bend, and the bottom surface of the notch is lower than the lower surface of the top wall; And / or, the portion of the connecting wall that connects to the second short side extends along the second short side, and the outer edges of both ends of the connecting wall do not extend beyond the outer edges of both ends of the second short side.

3. The sound-generating device as described in claim 1, characterized in that, The top wall extends along the second direction, and the connector includes two connecting walls, which are respectively connected to the two ends of the top wall along the second direction.

4. The sound-generating device as described in claim 3, characterized in that, The top wall is provided with multiple through holes; The multiple through holes are spaced apart. Alternatively, multiple through holes may be arranged in an array along the second direction.

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 portion, a bent portion, and a fixed portion connected in sequence. The vibrating plate is connected to the central portion so that the vibrating plate and the central portion form the intermediate 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.

6. The sound-generating device as claimed in claim 1, characterized in that, The connecting wall includes a first segment extending along the first direction and a second segment extending along the second direction from the end of the first segment away from the diaphragm assembly, the second segment being connected to the top surface of the second short side.

7. The sound-generating device as described in claim 6, characterized in that, The connecting wall also includes a third segment extending along the first direction from the end of the second segment away from the first segment, the third segment being connected to the sidewall of the second short side.

8. The sound-generating device as claimed in claim 1, characterized in that, The connecting wall includes a fourth segment extending along the first direction and a support wall extending from the fourth segment by bending along the second direction. The fourth segment is connected to the side wall of the second short side, and the support wall is connected to the bottom surface of the second short side.

9. The sound-generating device as claimed in claim 1, characterized in that, The sound-generating device also includes a housing, one end of which is connected to the magnetic yoke, and the other end of which is connected to the fixing part; The vibration system further includes two elastic supports, which are respectively located at both ends of the sound-generating device along the second direction. The elastic support includes an outer connecting part, a deformable part, and an inner connecting part. The outer connecting part is connected to the outer shell, and the inner connecting part is connected to the second short side and / or the connecting wall.

10. The sound-generating device as claimed in claim 9, characterized in that, The connecting wall has a vertical section that connects to the outer wall of the second short side; The inner connecting portion is connected to the end of the vertical segment; or, the connecting wall further has an edge portion that extends from the vertical segment along the second direction by bending, and the inner connecting portion is connected to the edge portion.

11. The sound-generating device as claimed in claim 1, characterized in that, The bent portion has a centerline position, and the portion of the first long straight edge located outside the centerline position at least partially overlaps with the projection of the second long straight edge along the first direction. Wherein, the projection of the second long straight edge along the first direction is located outside the centerline position; And / or, the projection of the second long straight edge along the first direction is located inside the outer edge of the first long straight edge.

12. The sound-generating device as claimed in claim 1, characterized in that, The magnetic yoke includes a base plate and a side plate that extends from the periphery of the base plate. The magnetic circuit assembly is disposed on the base plate and forms a magnetic gap with the side plate. The voice coil is located within the magnetic gap.

13. The sound-generating device as claimed in claim 12, 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. And / or, the magnetic circuit assembly includes a first magnet, a magnetic guide plate, and a second magnet stacked along the first direction, the second magnet being connected to the base plate; wherein, along the second direction or the third direction, at least a portion of the voice coil is opposite to the magnetic guide plate; and / or, the first magnet and the second magnet are both magnetized along the first direction but in opposite directions.

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

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