A vibration sound generating device

Abstract

The embodiment of the present application provides a vibrating sound device, comprising a shell, a vibrating assembly, a driving coil and an elastic sheet, wherein the vibrating assembly comprises a yoke, a vibrating system and a magnetic circuit system; the vibrating system comprises a first vibrating diaphragm, a first voice coil for driving the first vibrating diaphragm to vibrate and sound, a second vibrating diaphragm and a second voice coil for driving the second vibrating diaphragm to vibrate and sound; the magnetic circuit system comprises a first magnet assembly with a first magnetic gap and a second magnet assembly with a second magnetic gap; the first voice coil is inserted into the first magnetic gap, and the second voice coil is inserted into the second magnetic gap; the first magnet assembly is provided with a through hole penetrating through the first magnet assembly along a first direction; a driving magnetic steel is fixed to the first magnet assembly and located in the through hole, and the driving coil is located in the through hole and drives the vibrating assembly to vibrate. The whole weight is used as the vibrating mass, and the vibrating mass does not need to be additionally provided, so that the size can be effectively reduced; and the loudspeaker with coaxial full-band low and high sounds can be formed, the overall frequency band is widened, and high-quality sound effects are provided.

Description

Technical Field

[0001] The embodiments of the present invention belong to the field of electroacoustic conversion technology, specifically relating to a vibration sound-generating device. Background Technology

[0002] With the continuous innovation of smart mobile devices, they are becoming increasingly popular among users. The most common examples are mobile phones, tablets, and handheld game consoles. The design of both playback and vibration functions in smart mobile devices has become a basic feature. Therefore, vibration-generating devices that combine playback and vibration functions are now widely used in smart mobile devices.

[0003] In related technologies, vibration-generating devices supplement the vibration mass of the device by providing an additional mass block. However, these devices are relatively large in size, provide weak electromagnetic driving force, and have a single and narrow overall frequency band, resulting in poor acoustic performance. Summary of the Invention

[0004] The embodiments of the present invention aim to at least solve one of the technical problems existing in the prior art, and provide a vibration sound-generating device.

[0005] An embodiment of the present invention provides a vibration sound-generating device, including a housing, a sound outlet through the housing, a vibration component housed within the housing, a drive coil that drives the vibration component to vibrate and is fixed within the housing, and a spring plate that elastically suspends the vibration component within the housing. The vibration component includes a sound-generating unit and a drive magnet.

[0006] The sound-generating unit includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and generate sound in a first direction; the vibration system includes a first vibration system and a second vibration system coaxially arranged and fixed to the frame, the first vibration system surrounding the second vibration system, the first vibration system including a first diaphragm fixed to the frame and a first voice coil fixed to the first diaphragm and driving the first diaphragm to vibrate and generate sound, and the second vibration system including a second diaphragm and a second voice coil fixed to the second diaphragm and driving the second diaphragm to vibrate and generate sound;

[0007] The magnetic circuit system includes a first magnet assembly having a first magnetic gap and a second magnet assembly fixed to the first magnet assembly facing the vibration system and having a second magnetic gap; the first voice coil is inserted in the first magnetic gap and drives the first diaphragm to vibrate to produce a low tone, the second voice coil is inserted in the second magnetic gap and drives the second diaphragm to vibrate to produce a high tone; the first magnet assembly has a through hole extending through it along the first direction;

[0008] The driving magnet is fixed to the first magnet assembly and located inside the through hole. The driving coil is located inside the through hole and is spaced apart from the driving magnet, driving the vibration assembly to vibrate in a second direction perpendicular to the first direction.

[0009] Optionally, the first magnet assembly includes a lower clamping plate, an annular main magnet fixed to the lower clamping plate near the vibration system, and a secondary magnet surrounding the outer periphery of the main magnet and spaced apart from the main magnet to form the first magnetic gap; the lower clamping plate is provided with a first clearance hole passing through it along the first direction to avoid the drive coil and the drive magnet, and the first clearance hole communicates with the through hole; the drive magnet includes two magnets, which are respectively fixed to the two opposite inner sides of the main magnet along a third direction and are arranged facing each other, and the third direction is perpendicular to the first direction and the second direction.

[0010] Optionally, the second magnet assembly includes a magnetic cup body stacked on the side of the main magnet away from the lower clamping plate, an annular magnetic cup extension extending from the central region of the magnetic cup body away from the lower clamping plate, and an overlapping plate covering the magnetic cup extension away from the lower clamping plate and having a second clearance hole; the second clearance hole communicates with the first clearance hole and the through hole;

[0011] The second magnet assembly also includes a second set of magnets in the shape of a ring. The second set of magnets is placed on the side of the magnetic cup body away from the lower clamping plate. The second set of magnets surrounds the extension of the magnetic cup and is spaced apart from each other to form the second magnetic gap.

[0012] Optionally, the lower clamping plate includes a lower clamping plate body for fixing the main magnet and the auxiliary magnet, and two fixing parts that bend and extend from one of the diagonal positions of the lower clamping plate body toward the direction of the vibration system.

[0013] Optionally, the spring includes two springs, which are located on both sides of the lower clamping plate along the second direction. One end of each spring is fixed to the two fixing parts, and the other end of each spring is connected to the housing to elastically support the vibration assembly within the housing.

[0014] Optionally, the vibration sound-generating device further includes a first flexible circuit board; the first flexible circuit board includes a lead wire connection portion stacked on the side of the overlapping plate near the second diaphragm, and an extension fixing portion extending from the lead wire connection portion away from the second diaphragm and fixed to the side of the lower clamping plate away from the main magnet; the lead wire connection portion is electrically connected to the second voice coil, and the extension fixing portion passes through the second clearance hole, the through hole, and the first clearance hole in sequence.

[0015] Optionally, the main magnet includes four sub-magnets arranged around the outside of the through hole, the four sub-magnets being spliced ​​together end to end to form a ring; the auxiliary magnets include four and are respectively spaced apart and arranged opposite to each other on the outside of the four sub-magnets; and the first magnet assembly also includes four auxiliary pole cores integrally formed with the basket frame and respectively stacked on the side of the four auxiliary magnets away from the lower clamping plate.

[0016] Optionally, the four auxiliary magnets are divided into two first auxiliary magnets that are directly opposite each other and distributed along the second direction, and two other third auxiliary magnets that are directly opposite each other and distributed along the third direction.

[0017] The vibration sound-generating device also includes two second flexible circuit boards respectively surrounding the two first auxiliary magnets, and the two second flexible circuit boards and the orthographic projections of the two first auxiliary magnets on the lower clamping plate do not overlap with each other.

[0018] The second flexible circuit board is fixed to the side of the frame away from the first diaphragm.

[0019] Optionally, the lower clamping plate includes a first sub-lower clamping plate and a second sub-lower clamping plate; the main magnet and the auxiliary magnet are both fixed to the first sub-lower clamping plate, the second sub-lower clamping plate is disposed on the side of the first sub-lower clamping plate near the vibration system and is spaced around the outer periphery of the auxiliary magnet, and the projections of the second sub-lower clamping plate and the auxiliary magnet on a plane parallel to the first direction at least partially overlap.

[0020] Optionally, the vibration-generating device further includes a voice coil fitting sandwiched between the second diaphragm and the second voice coil.

[0021] The vibration-generating device of the present invention utilizes the entire sound-generating unit as a vibrating mass block, eliminating the need for additional vibrating mass and effectively reducing size; by forming a coaxial full-range speaker with bass and treble frequencies, the overall frequency band is widened to provide high-quality sound effects; and by integrating a magnet assembly into the magnetic circuit system, the electromagnetic driving force of the vibration-generating device is further enhanced. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the vibration sound-generating device of the present invention;

[0023] Figure 2 for Figure 1 A cross-sectional view along line AA;

[0024] Figure 3 for Figure 1 A cross-sectional view along line BB;

[0025] Figure 4This is a partial structural diagram of the vibration sound-generating device of the present invention;

[0026] Figure 5 This is a schematic diagram of the lower clamping plate of the present invention;

[0027] Figure 6 This is an exploded three-dimensional structural diagram of the vibration sound-generating device of the present invention. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 6 As shown, a vibration sound-generating device 100 includes a housing 110, a sound outlet 200 penetrating the housing 110, a vibration component 120 housed within the housing 110, a drive coil 130 that drives the vibration component 120 to vibrate and is fixed within the housing 110, and a spring piece 140 that elastically suspends the vibration component 120 within the housing 110. The vibration component 120 includes a sound-generating unit 121 and a drive magnet 122.

[0030] The sound-generating unit 121 includes a frame 1211, a vibration system 1212 fixed to the frame 1211, and a magnetic circuit system 1213 that drives the vibration system 1212 to vibrate and generate sound in a first direction. The vibration system 1212 includes a first vibration system 12121 and a second vibration system 12122 coaxially arranged and fixed to the frame 1211. The first vibration system 12121 surrounds the second vibration system 12122. The first vibration system 12121 includes a first diaphragm 121211 fixed to the frame 1211 and a first voice coil 121212 fixed to the first diaphragm 121211 and driving the first diaphragm 121211 to vibrate and generate sound. The second vibration system 12122 includes a second diaphragm 121221 and a second voice coil 121222 fixed to the second diaphragm 121221 and driving the second diaphragm 121221 to vibrate and generate sound.

[0031] The magnetic circuit system 1213 includes a first magnet assembly 12131 having a first magnetic gap 300 and a second magnet assembly 12132 fixed to the first magnet assembly 12131 facing the vibration system 1212 and having a second magnetic gap 400. The first voice coil 121212 is inserted into the first magnetic gap 300 and drives the first diaphragm 121211 to vibrate and produce bass frequencies. The second voice coil 121222 is inserted into the second magnetic gap 400 and drives the second diaphragm 121221 to vibrate and produce treble frequencies. The first magnet assembly 12131 has a through hole 121311 extending through it along the first direction.

[0032] The driving magnet 122 is fixed to the first magnet assembly 12131 and located in the through hole 121311. The driving coil 130 is located in the through hole 121311 and is spaced apart from the driving magnet 122, driving the vibration assembly 120 to vibrate in a second direction perpendicular to the first direction.

[0033] Specifically, such as Figures 1 to 6 As shown, the vibration assembly 120 is elastically suspended within the housing 110 by a spring sheet 140, and the vibration assembly 120 vibrates along the second direction under the interaction of the driving magnet 122 and the driving coil 130. It should be noted that the first, second, and third directions are mutually perpendicular, as shown in the figure. Figure 1 As shown. The housing 110 includes a lower base plate 111 and an upper cover 112 that covers the lower base plate 111. The upper cover 112 has a sound outlet hole 200 that extends through its thickness direction. The drive coil 130 is disposed on the lower base plate 111.

[0034] As a specific example, the first diaphragm 121211 is annular, and the first diaphragm 121211 and the second diaphragm 121221 are coaxially arranged, both located on the side near the upper cover 112. The first diaphragm 121211 is spaced apart from and surrounds the outer side of the second diaphragm 121221, which can increase the size of the woofer, thereby improving the bass acoustic performance of the vibration sound-generating device 100. The coaxial arrangement of the first diaphragm 121211 and the second diaphragm 121221 allows the bass and treble to form a coaxial full-range speaker, providing high-quality sound effects, widening the overall frequency band, and thus improving the acoustic performance of the vibration sound-generating device 100. The second vibration system 12122 further includes a voice coil fitting 170 sandwiched between the second diaphragm 121221 and the second voice coil 121222, and a steel ring 190 sandwiched between the first diaphragm 121211 and the second diaphragm 121221. Specifically, the voice coil fitting 170 is also provided with a clearance portion 171 for the lead wire (not shown) of the second voice coil 121222 to pass through. During assembly, the lead wire of the second voice coil 121222 is arranged in the clearance portion 171, and then the remaining part of the voice coil 170 is glued to the voice coil fitting 170. Then, the voice coil fitting 170 is glued to the dome 1212211 on the second diaphragm 121221. This avoids pressing the lead wire of the second voice coil 121222 when the dome 1212211 is glued, and also strengthens the bonding strength between the second voice coil 121222 and the dome 1212211.

[0035] The second magnet assembly 12132 further includes an upper clamping plate 121321 mounted on the side of the second auxiliary magnet 12139 opposite to the magnetic cup body 12136 and spaced apart from the second voice coil 121222. The vibration sound-generating device 100 further includes a top cover 180 covering the side of the second diaphragm 121221 opposite to the magnetic circuit system 1213, and the top cover 180 has a high-frequency sound outlet 181.

[0036] The vibration-generating device 100 also includes a frame 131 fixed to the lower base plate 111 and located between the drive magnets 122, with the drive coil 130 wound around the frame 131. The vibration-generating device 100 also includes a third flexible circuit board 132 fixed to the lower base plate 111 and electrically connected to the drive coil 130. One end of the third flexible circuit board 132, away from the drive coil 130, extends outside the housing 110. This design facilitates electrical connection of the drive coil 130 to an external power source.

[0037] The first voice coil 121212 is inserted into the first magnetic gap 300 of the first magnet assembly 12131 and drives the first diaphragm 121211 to vibrate and produce bass, thus enabling the vibration sound-generating device 100 to provide bass sound effects. The second voice coil 121222 is inserted into the second magnetic gap 400 of the second magnet assembly 12132 and drives the second diaphragm 121221 to vibrate and produce treble, thus enabling the vibration sound-generating device 100 to provide treble sound effects. The first magnetic gap 300 surrounds the second magnetic gap 400, and this structure achieves coaxial full-frequency sound generation, resulting in good acoustic performance of the vibration sound-generating device 100.

[0038] The driving magnet 122 is fixed to the first magnet assembly 12131 and located in the through hole 121311. Integrating the driving magnet 122, the first magnet assembly 12131 and the second magnet assembly 12132 can improve the overall mass and driving force of the sound-generating unit 121, so that there is no need to add additional vibration mass. This is beneficial to reduce the size of the vibration sound-generating device and can effectively improve the BL value and vibration sensation of the vibration sound-generating device, thereby improving its performance.

[0039] For example, such as Figures 1 to 6 As shown, the first magnet assembly 12131 includes a lower clamping plate 12133, an annular main magnet 12134 fixed to the lower clamping plate 12133 near the vibration system 1212, and a secondary magnet 12135 surrounding the main magnet 12134 and spaced from the main magnet 12134 to form the first magnetic gap 300.

[0040] The lower clamping plate 12133 is provided with a first clearance hole 500 that passes through it along the first direction to avoid the drive coil 130 and the drive magnet 122. The first clearance hole 500 communicates with the through hole 121311. There are two drive magnets 122, which are respectively fixed to the two inner sides of the main magnet 12134 along a third direction and are arranged facing each other. The lower clamping plate 12133 includes a lower clamping plate body 121331 for fixing the main magnet 12134 and the auxiliary magnet 12135, and two fixing parts 121332 that bend and extend from one of the diagonal positions of the lower clamping plate body 121331 toward the vibration system 1212.

[0041] Specifically, such as Figures 1 to 6As shown, the main magnet 12134 is designed as a hollow ring, with the hollow portion serving as the through hole 121311. It can be designed as a single, integral ring structure, a ring structure formed by splicing multiple sub-magnets 121341 end-to-end, or a broken ring structure with notches, where the notches can be one or multiple notches spaced apart. In this embodiment, the main magnet 12134 includes four sub-magnets 121341 arranged around the outside of the through hole 121311, with the four sub-magnets 121341 spliced ​​end-to-end to form a ring. The auxiliary magnets 12135 include four, respectively spaced apart and arranged opposite each other on the outside of the four sub-magnets 121341. Furthermore, the first magnet assembly 12131 also includes four auxiliary pole cores 12111 integrally formed with the frame 1211 and stacked on the side of the four auxiliary magnets 12135 facing away from the lower clamping plate 12133. Of course, if the secondary pole core 12111 is not designed, the side of the secondary magnet 12135 facing away from the lower clamping plate 12133 can also be directly fixedly connected to the basin frame 1211.

[0042] Further, the second magnet assembly 12132 includes a magnetic cup body 12136 stacked on the side of the main magnet 12134 opposite to the lower clamping plate 12133, an annular magnetic cup extension 12137 extending from the central region of the magnetic cup body 12136 away from the lower clamping plate 12133, and an overlapping plate 12138 covering the magnetic cup extension 12137 away from the lower clamping plate 12133 and having a second clearance hole 600. The second clearance hole 600 communicates with the first clearance hole 500 and the through hole 121311.

[0043] The second magnet assembly 12132 further includes a ring-shaped second auxiliary magnet 12139. The second auxiliary magnet 12139 is mounted on the side of the magnetic cup body 12136 opposite to the lower clamping plate 12133. The second auxiliary magnet 12139 surrounds the magnetic cup extension 12137 and is spaced apart to form the second magnetic gap 400. The magnetic cup extension 12137 is configured as a magnetic conductive sheet, thereby avoiding the need to add an additional magnet of opposite polarity inside the second voice coil 121222, effectively saving space.

[0044] The main magnet 12134 and the auxiliary magnet 12135 form a first magnetic gap 300, and the second auxiliary magnet 12139 and the magnetic cup extension 12137 form a second magnetic gap 400. The stacked first magnet assembly 12131 and second magnet assembly 12132 can maximize the release of the internal space of the vibration sound-generating device, resulting in a small overall thickness of the vibration sound-generating device, which is beneficial for the lightweight and thin application of the vibration sound-generating device. Furthermore, two drive magnets 122 are fixed on the inner periphery of the main magnet 12134 and arranged in a third direction. This can make full use of the mass of the sound-generating unit 121. Both the drive magnets 122 and the sound-generating unit 121 can be used as mass blocks of the vibration assembly 120, which can save costs and further improve the linear driving force of the vibration sound-generating device, thereby making the vibration performance of the vibration sound-generating device better and the electromagnetic driving force stronger.

[0045] By designing the main magnet 12134 as a ring, and arranging the drive magnet 122 on the inner circumference of the main magnet 12134, and placing the drive coil 130 on the inner circumference of the main magnet 12134 and spaced apart from the drive magnet 122, the drive coil 130 drives the magnetic circuit system 1213 to vibrate in a direction perpendicular to the diaphragm. This integrates the magnetic circuit system 1213 with the vibration system 1212, thereby improving the overall quality and driving force of the sound-generating unit, thus improving the BL value and vibration feel of the vibration sound-generating device and enhancing its performance.

[0046] For example, such as Figures 1 to 6 As shown, the four auxiliary magnets 12135 are divided into two first auxiliary magnets 121351 that are directly opposite each other and distributed along the second direction, and two other third auxiliary magnets 121352 that are directly opposite each other and distributed along the third direction.

[0047] The vibration-generating device 100 includes a first flexible circuit board 150. The first flexible circuit board 150 includes a lead wire connection portion 151 stacked on the side of the overlapping plate 12138 near the second diaphragm 121221, and an extension fixing portion 152 extending from the lead wire connection portion 151 away from the second diaphragm 121221 and fixed to the lower clamping plate 12133 on the side opposite to the main magnet 12134. The lead wire connection portion 151 is electrically connected to the second voice coil 121222, and the extension fixing portion 152 passes sequentially through the second clearance hole 600, the through hole 121311, and the first clearance hole 500. The first flexible circuit board 150 also includes an extension portion 153 extending outward from the housing 110 for convenient connection to external electrical signals.

[0048] The vibration sound-generating device 100 further includes two second flexible circuit boards 160 respectively surrounding the two first auxiliary magnets 121351. The orthographic projections of the two second flexible circuit boards 160 and the two first auxiliary magnets 121351 on the lower clamping plate 12133 do not overlap. The second flexible circuit boards 160 are fixed to the side of the frame 1211 away from the first diaphragm 121211.

[0049] Two second flexible circuit boards 160 are used to electrically connect the first voice coil 121212 and the external circuit. The second flexible circuit boards 160 can enhance the vibration effect of the first diaphragm 121211 and improve the acoustic performance of the vibration sound generating device 100. On the other hand, they can balance the swaying of the vibration sound generating device 100 and improve the stability of the vibration sound generating device 100.

[0050] Furthermore, the second flexible circuit board 160 and the first flexible circuit board 150 can be electrically connected inside the housing 110 before being connected together to an external circuit. In other embodiments, the second flexible circuit board 160 and the first flexible circuit board 150 can also extend outside the housing and then be connected to an external circuit.

[0051] For example, such as Figures 1 to 6 As shown, the spring piece 140 includes two pieces, which are respectively located on both sides of the lower clamping plate 12133 along the second direction. One end of each spring piece 140 is fixed to the two fixing parts 121332, and the other end of each spring piece 140 is connected to the housing 110 to elastically support the vibration assembly 120 within the housing 110. Figure 4 As shown, the spring 140 is configured as a "straight line" structure, and it has clearance areas at the upper and lower parts in the first direction, so that the first flexible circuit board 150 and the third flexible circuit board 132 can pass through the corresponding clearance areas to the outside of the housing 110. In other embodiments, the spring 140 can also be configured as a C-shaped structure.

[0052] For example, such as Figures 1 to 6As shown, the lower clamping plate 12133 includes a first sub-lower clamping plate 121333 and a second sub-lower clamping plate 121334. The main magnet 12134 and the auxiliary magnet 12135 are both fixed to the first sub-lower clamping plate 121333 on the side near the vibration system 1212. The second sub-lower clamping plate 121334 is disposed on the first sub-lower clamping plate 121333 and spaced around the outer periphery of the auxiliary magnet 12135. The projections of the second sub-lower clamping plate 121334 and the auxiliary magnet 12135 on a plane parallel to the first direction at least partially overlap. This design, because the second sub-lower clamping plate 121334 is located on the periphery of the auxiliary magnet 12135, can limit the movement of the auxiliary magnet 12135, improving assembly efficiency, while also further increasing the weight of the vibration assembly 120. In addition, a reinforcing part (not shown) matching the fixing part 121332 can also be provided at the position of the second lower clamping plate 121334 corresponding to the fixing part 121332, thereby strengthening the structural strength of the fixing part 232.

[0053] Furthermore, the vibration sound-generating device 100 also includes an elastic connector 700, one end of which is elastically connected to the upper cover 112, and the other end of which is elastically connected to the basin stand 1211. The elastic connector 700 can elastically connect the upper cover 112 and the basin stand 1211 and provide a sealing function.

[0054] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A vibration sound-generating device, comprising a housing, a sound outlet through the housing, a vibration component housed within the housing, a drive coil for driving the vibration component to vibrate and fixed within the housing, and a spring sheet for elastically suspending the vibration component within the housing, wherein the vibration component comprises a sound-generating unit and a drive magnet; The sound-generating unit includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and generate sound in a first direction; characterized in that, The vibration system includes a first vibration system and a second vibration system coaxially arranged and fixed to the basin frame. The first vibration system surrounds the second vibration system. The first vibration system includes a first diaphragm fixed to the basin frame and a first voice coil fixed to the first diaphragm and driving the first diaphragm to vibrate and produce sound. The second vibration system includes a second diaphragm and a second voice coil fixed to the second diaphragm and driving the second diaphragm to vibrate and produce sound. The magnetic circuit system includes a first magnet assembly having a first magnetic gap and a second magnet assembly fixed to the first magnet assembly facing the vibration system and having a second magnetic gap; the first voice coil is inserted in the first magnetic gap and drives the first diaphragm to vibrate to produce a low tone, the second voice coil is inserted in the second magnetic gap and drives the second diaphragm to vibrate to produce a high tone; the first magnet assembly has a through hole extending through it along the first direction; The driving magnet is fixed to the first magnet assembly and located in the through hole. The driving coil is located in the through hole and is spaced apart from the driving magnet, and drives the vibration assembly to vibrate in a second direction perpendicular to the first direction. The first magnet assembly includes a lower clamping plate, an annular main magnet fixed to the lower clamping plate near the vibration system, and a secondary magnet surrounding the outer periphery of the main magnet and spaced apart from the main magnet to form the first magnetic gap. The lower clamping plate is provided with a first clearance hole that passes through it along the first direction to avoid the drive coil and the drive magnet. The second magnet assembly includes a magnetic cup body stacked on the side of the main magnet facing away from the lower clamping plate, an annular magnetic cup extension extending from the central region of the magnetic cup body towards the side facing away from the lower clamping plate, and an overlapping plate covering the side of the magnetic cup extension facing away from the lower clamping plate and having a second clearance hole; the second clearance hole communicates with the first clearance hole and the through hole; the second magnet assembly also includes an annular second auxiliary magnet, the second auxiliary magnet overlapping the side of the magnetic cup body facing away from the lower clamping plate, the second auxiliary magnet surrounding the magnetic cup extension and spaced apart to form the second magnetic gap; The vibration-generating device further includes a first flexible circuit board; the first flexible circuit board includes a lead wire connection portion stacked on the side of the overlapping plate near the second diaphragm, and an extension fixing portion extending from the lead wire connection portion away from the second diaphragm and fixed to the side of the lower clamping plate away from the main magnet; the lead wire connection portion is electrically connected to the second voice coil, and the extension fixing portion passes through the second clearance hole, the through hole, and the first clearance hole in sequence; and the portion of the extension fixing portion located inside the magnetic cup extension portion is suspended inside the magnetic cup extension portion. The spring sheet has avoidance areas at its upper and lower parts along the first direction; the lower clamping plate includes a first sub-lower clamping plate and a second sub-lower clamping plate; the main magnet and the auxiliary magnet are both fixed to the first sub-lower clamping plate, the second sub-lower clamping plate is located on the side of the first sub-lower clamping plate close to the vibration system and is spaced around the outer periphery of the auxiliary magnet, and the projections of the second sub-lower clamping plate and the auxiliary magnet on a plane parallel to the first direction at least partially overlap.

2. The vibration-generating sound device according to claim 1, characterized in that, The first clearance hole communicates with the through hole; the driving magnet includes two, and the two driving magnets are respectively fixed to the two inner sides of the main magnet along a third direction and are arranged facing each other, the third direction being perpendicular to the first direction and the second direction.

3. The vibration-generating sound device according to claim 2, characterized in that, The lower clamping plate includes a lower clamping plate body for fixing the main magnet and the auxiliary magnet, and two fixing parts that bend and extend from one of the diagonal positions of the lower clamping plate body toward the direction of the vibration system.

4. The vibration-generating sound device according to claim 3, characterized in that, The spring includes two springs, which are located on both sides of the lower clamping plate along the second direction. One end of each spring is fixed to the two fixing parts, and the other end of each spring is connected to the housing to elastically support the vibration assembly inside the housing.

5. The vibration-generating sound device according to claim 2, characterized in that, The main magnet includes four sub-magnets arranged around the outside of the through hole, and the four sub-magnets are spliced ​​together end to end to form a ring; the auxiliary magnets include four and are respectively spaced apart and arranged on the outside of the four sub-magnets; and the first magnet assembly also includes four auxiliary pole cores integrally formed with the basket frame and respectively stacked on the side of the four auxiliary magnets away from the lower clamping plate.

6. The vibration-generating sound device according to claim 5, characterized in that, The four auxiliary magnets are divided into two first auxiliary magnets that are directly opposite each other and distributed along the second direction, and two other third auxiliary magnets that are directly opposite each other and distributed along the third direction. The vibration sound-generating device also includes two second flexible circuit boards respectively surrounding the two first auxiliary magnets, and the two second flexible circuit boards and the orthographic projections of the two first auxiliary magnets on the lower clamping plate do not overlap with each other. The second flexible circuit board is fixed to the side of the frame away from the first diaphragm.

7. The vibration-generating sound device according to claim 1, characterized in that, The vibration-generating device also includes a voice coil fitting sandwiched between the second diaphragm and the second voice coil.

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