Vibration sounding device

Abstract

The embodiment of the invention provides a vibration sound production device, which comprises a shell, a vibration assembly, a driving coil and an elastic sheet, and is characterized in that the vibration assembly comprises a basin stand, a vibration system and a magnetic circuit system; the vibration system comprises a first vibrating diaphragm, a first voice coil for driving the first vibrating diaphragm to vibrate and produce sound, a second vibrating diaphragm and a second voice coil for driving the second vibrating diaphragm to vibrate and produce 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 in the first direction. The 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 vibration assembly to vibrate. The overall weight is used as the vibration mass, the vibration mass does not need to be additionally provided, and the size can be effectively reduced; moreover, the loudspeaker enables low pitch and high pitch to form a coaxial full frequency band, widens the whole frequency band, and provides a high-quality sound effect.

Description

Technical Field

[0001] The embodiments of the present invention belong to the technical field of electroacoustic conversion, and particularly relate to a vibration sound-generating device. Background Art

[0002] With the continuous innovation of smart mobile devices, they are becoming more and more popular among users. The most common ones are mobile phones, tablets, and handheld game consoles. Designing both playback and vibration functions in smart mobile devices has become a basic function. Therefore, vibration sound-generating devices with both playback and vibration functions are now widely used in smart mobile devices.

[0003] In the related art, the vibration sound-generating device provides an additional mass block as a supplement to the vibration mass of the vibration sound-generating device. Its volume is relatively large and the electromagnetic driving force it can provide is weak. Its overall frequency band is single and narrow, and its acoustic performance is poor. Summary of the Invention

[0004] The embodiments of the present invention aim to solve at least 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, comprising a housing, a sound outlet extending through the housing, a vibration assembly housed within the housing, a drive coil fixed within the housing to drive the vibration assembly, and a spring that elastically suspends the vibration assembly within the housing, wherein the vibration assembly includes a sound-generating unit and a drive magnet. The sound-emitting unit includes a basket, a vibration system respectively fixed to the basket, and a magnetic circuit system for driving the vibration system to vibrate in a first direction to produce sound; the vibration system includes a first vibration system and a second vibration system coaxially fixed to the basket, the first vibration system surrounds the second vibration system, the first vibration system includes a first diaphragm fixed to the basket 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 a side of the first magnet assembly facing the vibration system and having a second magnetic gap; the first voice coil is inserted into the first magnetic gap and drives the first diaphragm to vibrate and produce bass, and the second voice coil is inserted into the second magnetic gap and drives the second diaphragm to vibrate and produce treble; the first magnet assembly is provided with a through hole extending therethrough in the first direction; The driving magnet is fixed to the first magnet assembly and is located in the through hole. The driving coil is located in the through hole and is arranged opposite to the driving magnet and drives the vibration assembly to vibrate along a second direction perpendicular to the first direction.

[0006] Optionally, the first magnet assembly includes a lower clamping plate, an annular main magnet fixed to the lower clamping plate on one side close to the vibration system, and an auxiliary magnet surrounding the outer periphery of the main magnet and spaced from the main magnet to form the first magnetic gap; the lower clamping plate is provided with a first avoidance hole passing through it along the first direction to avoid the driving coil and the driving magnet, and the first avoidance hole is connected to the through hole; the driving magnets include two, and the two driving magnets are respectively fixed to the opposite inner sides of the main magnet along a third direction and are arranged opposite to each other, and the third direction is perpendicular to the first direction and the second direction.

[0007] Optionally, the second magnet assembly includes a magnetic bowl body stacked on a side of the main magnet facing away from the lower clamping plate, an annular magnetic bowl extension extending and bending from a central area of ​​the magnetic bowl body toward a side facing away from the lower clamping plate, and a lap plate covering a side of the magnetic bowl extension facing away from the lower clamping plate and having a second avoidance hole; the second avoidance hole is connected to the first avoidance hole and the through hole; The second magnet assembly further includes a second annular secondary magnet, which is mounted on a side of the magnetic bowl body away from the lower clamping plate. The second secondary magnet surrounds the magnetic bowl extension and is spaced apart from each other to form the second magnetic gap.

[0008] Optionally, the lower clamping plate includes a lower clamping plate body for fixing the main magnetic steel and the auxiliary magnetic steel, and two fixing parts bent and extended from one group of diagonal positions of the lower clamping plate body toward the direction of the vibration system.

[0009] Optionally, the spring clips include two, and the two spring clips are respectively located on both sides of the lower splint along the second direction, one end of the two spring clips is respectively fixed to the two fixing parts, and the other ends of the two spring clips are respectively connected to the shell to elastically support the vibration component in the shell.

[0010] Optionally, the vibration sound-generating device also includes a first flexible circuit board; the first flexible circuit board includes a lead connection portion stacked on the side of the strapping plate close to the second diaphragm, and an extended fixing portion bent and extended from the lead connection portion in a direction away from the second diaphragm and fixed to the side of the lower clamping plate away from the main magnet; the lead connection portion is electrically connected to the second voice coil, and the extended fixing portion passes through the second avoidance hole, the through hole, and the first avoidance hole in sequence.

[0011] Optionally, the main magnet includes four sub-magnets arranged along the outer periphery of the through hole, and the four sub-magnets are spliced ​​end to end to form a ring; the auxiliary magnets include four and are respectively and spaced apart and arranged on the outside of the four sub-magnets; and the first magnet assembly also includes four auxiliary pole cores that are integrally formed with the basin frame and are respectively stacked on the side of the four auxiliary magnets away from the lower clamping plate.

[0012] Optionally, the four auxiliary magnetic steels are divided into two first auxiliary magnetic steels distributed along the second direction and facing each other, and another two third auxiliary magnetic steels distributed along the third direction and facing each other; The vibration sound-generating device further includes two second flexible circuit boards respectively arranged around the two first secondary magnetic steels, wherein the orthographic projections of the two second flexible circuit boards and the two first secondary magnetic steels on the lower clamping plate do not overlap with each other; The second flexible circuit board is fixed to a side of the basin frame away from the first diaphragm.

[0013] Optionally, the lower clamping plate includes a first sub-lower clamping plate and a second sub-lower clamping plate; the main magnet and the secondary magnet are both fixed to the first sub-lower clamping plate, the second sub-lower clamping plate is arranged on the side of the first sub-lower clamping plate close to the vibration system and is spaced around the outer periphery of the secondary magnet, and the projection of the second sub-lower clamping plate and the secondary magnet on a plane parallel to the first direction at least partially overlaps.

[0014] Optionally, the vibration sound-generating device further includes a voice coil accessory sandwiched between the second diaphragm and the second voice coil.

[0015] The vibration sound-generating device of an embodiment of the present invention utilizes the entire sound-generating unit as a vibration mass block, does not require additional vibration mass, and can effectively reduce the size; by forming a coaxial full-band speaker for bass and treble, the overall frequency band is widened to provide high-quality sound effects; and the integration of magnetic steel components in the magnetic circuit system further enhances the electromagnetic driving force of the vibration sound-generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the overall structure of the vibration sound-generating device of the present invention; Figure 2 for Figure 1 Schematic diagram of the cross section along line AA; Figure 3 for Figure 1 Schematic cross-section along line BB; Figure 4 It is a schematic diagram of part of the structure of the vibration sound-generating device of the present invention; Figure 5 It is a structural schematic diagram of the lower splint of the present invention; Figure 6It is a schematic diagram of the three-dimensional structure decomposition of the vibration sound-generating device of the present invention. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0018] like Figures 1 to 6 As shown, a vibration sound-generating device 100 includes a shell 110, a sound outlet 200 passing through the shell 110, a vibration component 120 accommodated in the shell 110, a driving coil 130 that drives the vibration component 120 to vibrate and is fixed in the shell 110, and a spring 140 that elastically suspends the vibration component 120 in the shell 110. The vibration component 120 includes a sound-generating unit 121 and a driving magnet 122.

[0019] The sound 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 in a first direction to produce sound. The vibration system 1212 includes a first vibration system 12121 and a second vibration system 12122 coaxially 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 produce 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 produce sound.

[0020] 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 side of 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 sounds. The second voice coil 121222 is inserted into the second magnetic gap 400 and drives the second diaphragm 121221 to vibrate and produce treble sounds. The first magnet assembly 12131 is provided with a through hole 121311 extending along the first direction.

[0021] The driving magnet 122 is fixed to the first magnet assembly 12131 and is located in the through hole 121311. The driving coil 130 is located in the through hole 121311 and is arranged opposite to the driving magnet 122 and drives the vibration assembly 120 to vibrate along a second direction perpendicular to the first direction.

[0022] Specifically, if Figures 1 to 6 As shown, the vibration component 120 is elastically suspended in the housing 110 by the spring 140, and the vibration component 120 vibrates along the second direction under the interaction between the driving magnet 122 and the driving coil 130. It should be noted that the first direction, the second direction and the third direction are perpendicular to each other. Figure 1 The housing 110 includes a lower base plate 111 and an upper cover 112 covering the lower base plate 111 . The upper cover 112 is provided with a sound outlet 200 extending through the thickness thereof. The driving coil 130 is disposed on the lower base plate 111 .

[0023] As a specific example, the first diaphragm 121211 is annular and is coaxially arranged with the second diaphragm 121221, both of which are located on a side close to the upper cover 112. The first diaphragm 121211 is spaced apart from and surrounds the outside of the second diaphragm 121221, which can increase the size of the woofer, thereby improving the acoustic performance of the bass of the vibration sound-generating device 100. The first diaphragm 121211 and the second diaphragm 121221 are coaxially arranged. This structure enables the bass and treble to form a coaxial full-band speaker, providing high-quality sound effects and widening the overall frequency band, thereby improving the acoustic performance of the vibration sound-generating device 100. The second vibration system 12122 also includes a voice coil assembly 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 assembly 170 includes a relief portion 171 for the lead wires (not shown) of the second voice coil 121222 to pass through. During assembly, the lead wires of the second voice coil 121222 are arranged in the relief portion 171 before the remaining portion of the voice coil 170 is glued to the voice coil assembly 170. Finally, the voice coil assembly 170 is glued to the dome 1212211 on the second diaphragm 121221. This prevents the dome 1212211 from pressing on the lead wires of the second voice coil 121222 during gluing, and also strengthens the bonding strength between the second voice coil 121222 and the dome 1212211.

[0024] The second magnet assembly 12132 further includes an upper clamping plate 121321 mounted on a side of the second secondary magnet 12139 facing away from the magnetic bowl body 12136 and spaced apart from the second voice coil 121222. The vibration sound-generating device 100 further includes a top cover 180 covering a side of the second diaphragm 121221 facing away from the magnetic circuit system 1213. The top cover 180 defines a high-pitched sound hole 181.

[0025] The vibration sound-generating device 100 also includes a frame 131 fixed to the lower base plate 111 and positioned between the drive magnets 122. The drive coil 130 is wound around the frame 131. The vibration sound-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 between the drive coil 130 and an external power source.

[0026] 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, 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, 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-band sound generation, resulting in excellent acoustic performance for the vibration sound-generating device 100.

[0027] The driving magnet 122 is fixed to the first magnet assembly 12131 and is 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 unit 121, thereby eliminating the need to increase the vibration mass. This is beneficial to reducing 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.

[0028] For example, 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 on the side close to the vibration system 1212, and a secondary magnet 12135 surrounding the outer periphery of the main magnet 12134 and spaced from the main magnet 12134 to form the first magnetic gap 300.

[0029] The lower clamping plate 12133 is provided with a first avoidance hole 500 extending therethrough along the first direction to avoid the drive coil 130 and the drive magnet 122. The first avoidance hole 500 is connected to the through hole 121311. The drive magnets 122 include two, which are fixed to opposite inner sides of the main magnet 12134 along the third direction and arranged in a facing relationship. The lower clamping plate 12133 includes a lower clamping plate body 121331 that fixes the main magnet 12134 and the secondary magnet 12135, and two fixing portions 121332 that extend from a set of diagonal positions of the lower clamping plate body 121331 and bend toward the vibration system 1212.

[0030] Specifically, if Figures 1 to 6 As shown, the main magnet 12134 is designed to be hollow and annular, and the hollow part is the through hole 121311. It can be designed as an integral annular structure, or as an annular structure formed by splicing multiple sub-magnets 121341 end to end, or as a broken annular structure with a gap, and the gap can be designed as one or multiple gaps arranged at intervals. In this embodiment, the main magnet 12134 includes four sub-magnets 121341 arranged around the outer periphery of the through hole 121311, and the four sub-magnets 121341 are spliced ​​end to end to form an annular shape. The auxiliary magnets 12135 include four and are spaced and arranged on the outside of the four sub-magnets 121341. In addition, the first magnet assembly 12131 also includes four auxiliary pole cores 12111 that are integrally formed with the basin frame 1211 and are respectively 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.

[0031] Furthermore, the second magnet assembly 12132 includes a magnetic bowl body 12136 stacked on the side of the main magnet 12134 facing away from the lower clamping plate 12133, an annular magnetic bowl extension 12137 extending and bending from the central area of ​​the magnetic bowl body 12136 toward the side facing away from the lower clamping plate 12133, and a connecting plate 12138 covering the side of the magnetic bowl extension 12137 facing away from the lower clamping plate 12133 and having a second avoidance hole 600. The second avoidance hole 600 is connected to the first avoidance hole 500 and the through hole 121311.

[0032] The second magnet assembly 12132 also includes an annular second secondary magnet 12139, which is mounted on a side of the magnetic bowl body 12136 facing away from the lower clamping plate 12133. The second secondary magnets 12139 surround the magnetic bowl extension 12137 and are spaced apart to form a second magnetic gap 400. The magnetic bowl extension 12137 serves as a magnetic conductive sheet, thereby avoiding the need for an additional magnet of opposite polarity inside the second voice coil 121222, effectively saving space.

[0033] The main magnet 12134 and the secondary magnet 12135 form a first magnetic gap 300, and the second secondary magnet 12139 and the magnetic bowl extension 12137 form a second magnetic gap 400. The stacked first magnet assembly 12131 and the second magnet assembly 12132 can release the internal space of the vibration sound-generating device to the greatest extent, so that the overall thickness of the vibration sound-generating device is small, which is conducive to the lightweight application of the vibration sound-generating device. In addition, two driving magnets 122 arranged along the third direction are fixed on the inner circumference of the main magnet 12134, which can make full use of the mass of the sound-generating unit 121. The driving magnet 122 and the sound-generating unit 121 can be used as the mass block of the vibration assembly 120 to save costs and further enhance the linear driving force of the vibration sound-generating device, thereby making the vibration performance of the vibration sound-generating device good and the electromagnetic driving force strong.

[0034] By designing the main magnet 12134 into a ring shape, arranging the driving magnet 122 on the inner side of the main magnet 12134, and making the driving coil 130 located on the inner side of the main magnet 12134 and at the same time spaced apart from the driving magnet 122, so that the driving coil 130 drives the magnetic circuit system 1213 to vibrate along the vibration direction perpendicular to the diaphragm, the magnetic circuit system 1213 is integrated with the vibration system 1212 to improve the overall quality and driving force of the sound unit, thereby improving the BL value and vibration sense of the vibration sound-generating device, thereby improving its performance.

[0035] For example, Figures 1 to 6 As shown, the four secondary magnetic steels 12135 are divided into two first secondary magnetic steels 121351 distributed along the second direction and facing each other, and another two third secondary magnetic steels 121352 distributed along the third direction and facing each other.

[0036] The vibration sound-generating device 100 includes a first flexible circuit board 150. The first flexible circuit board 150 includes a lead connection portion 151 stacked on the side of the connecting plate 12138 near the second diaphragm 121221, and an extended fixing portion 152 that bends and extends from the lead connection portion 151 away from the second diaphragm 121221 and is fixed to the side of the lower clamping plate 12133 facing away from the main magnet 12134. The lead connection portion 151 is electrically connected to the second voice coil 121222. The extended fixing portion 152 sequentially passes through the second avoidance hole 600, the through hole 121311, and the first avoidance hole 500. The first flexible circuit board 150 also includes an extension portion 153 extending outward from the housing 110 to facilitate connection to external electrical signals.

[0037] The vibration sound-generating device 100 further includes two second flexible circuit boards 160, respectively disposed around the two first secondary magnetic steels 121351. The orthographic projections of the two second flexible circuit boards 160 and the two first secondary magnetic steels 121351 on the lower clamping plate 12133 do not overlap. The second flexible circuit boards 160 are fixed to a side of the basin frame 1211 away from the first diaphragm 121211.

[0038] The two second flexible circuit boards 160 are used to electrically connect the first voice coil 121212 to the external circuit. The second flexible circuit boards 160 can enhance the vibration effect of the first diaphragm 121211, improving the acoustic performance of the vibration sound-generating device 100. They can also balance the swaying of the vibration sound-generating device 100, improving its stability.

[0039] Furthermore, the second flexible circuit board 160 and the first flexible circuit board 150 can be electrically connected inside the housing 110 and then connected to an external circuit. In other embodiments, the second flexible circuit board 160 and the first flexible circuit board 150 can also be extended outside the housing and then connected to an external circuit.

[0040] For example, Figures 1 to 6 As shown, the two spring pieces 140 are respectively located on both sides of the lower clamping plate 12133 along the second direction, one end of the two spring pieces 140 is respectively fixed to the two fixing parts 121332, and the other ends of the two spring pieces 140 are respectively connected to the housing 110 to elastically support the vibration component 120 in the housing 110. Figure 4 As shown, the spring piece 140 is configured as a "I-shaped" structure, and avoidance areas are provided at the upper and lower parts thereof in the first direction, so that the first flexible circuit board 150 and the third flexible circuit board 132 pass through the corresponding avoidance areas to the outside of the shell 110. In other embodiments, the spring piece 140 can also be configured as a C-shaped structure.

[0041] For example, Figures 1 to 6 As 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 secondary magnet 12135 are both fixed to the side of the first sub-lower clamping plate 121333 close to the vibration system 1212. The second sub-lower clamping plate 121334 is arranged on the first sub-lower clamping plate 121333 and surrounds the outer periphery of the secondary magnet 12135 at intervals. The projections of the second sub-lower clamping plate 121334 and the secondary 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 outside the secondary magnet 12135, can limit the position of the secondary magnet 12135, improve assembly efficiency, and further reduce the weight of the vibration assembly 120. In addition, a reinforcing portion (not shown) matching the fixing portion 121332 may also be provided at a position of the second lower sub-clamping plate 121334 corresponding to the fixing portion 121332 , thereby enhancing the structural strength of the fixing portion 232 .

[0042] Furthermore, the vibration sound-generating device 100 further 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 frame 1211. The elastic connector 700 can elastically connect the upper cover 112 and the basin frame 1211 and perform a sealing function.

[0043] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such 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 extending through the housing, a vibration assembly housed within the housing, a drive coil fixed within the housing to drive the vibration assembly, and a spring element elastically suspending the vibration assembly within the housing, the vibration assembly comprising a sound-generating unit and a drive magnet; The sound-generating unit includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system for driving the vibration system to vibrate in a first direction to generate sound; and is characterized in that: The vibration system includes a first vibration system and a second vibration system that are coaxially fixed to the basin frame, the first vibration system surrounding the second vibration system, the first vibration system including 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, 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 produce sound; The magnetic circuit system includes a first magnet assembly having a first magnetic gap and a second magnet assembly fixed to a side of the first magnet assembly facing the vibration system and having a second magnetic gap; the first voice coil is inserted into the first magnetic gap and drives the first diaphragm to vibrate and produce bass, and the second voice coil is inserted into the second magnetic gap and drives the second diaphragm to vibrate and produce treble; the first magnet assembly is provided with a through hole extending therethrough in the first direction; The driving magnet is fixed to the first magnet assembly and is located in the through hole. The driving coil is located in the through hole and is arranged opposite to the driving magnet and drives the vibration assembly to vibrate along a second direction perpendicular to the first direction.

2. The vibration sound-generating device according to claim 1, characterized in that: The first magnet assembly includes a lower clamping plate, an annular main magnet fixed to the lower clamping plate on one side close to the vibration system, and an auxiliary magnet surrounding the outer periphery of the main magnet and spaced from the main magnet to form the first magnetic gap; the lower clamping plate is provided with a first avoidance hole passing through it along the first direction for avoiding the driving coil and the driving magnet, and the first avoidance hole is connected to the through hole; the driving magnets include two, and the two driving magnets are respectively fixed to the opposite inner sides of the main magnet along a third direction and are arranged opposite to each other, and the third direction is perpendicular to the first direction and the second direction.

3. The vibration sound-generating device according to claim 2, characterized in that: The second magnet assembly includes a magnetic bowl body stacked on the side of the main magnet facing away from the lower clamping plate, an annular magnetic bowl extension extending from the central area of ​​the magnetic bowl body and bending toward the side facing away from the lower clamping plate, and a lap plate covering the side of the magnetic bowl extension facing away from the lower clamping plate and having a second avoidance hole; the second avoidance hole is connected to the first avoidance hole and the through hole; The second magnet assembly further includes a second annular secondary magnet, which is mounted on a side of the magnetic bowl body away from the lower clamping plate. The second secondary magnet surrounds the magnetic bowl extension and is spaced apart from each other to form the second magnetic gap.

4. The vibration sound-generating device according to claim 2, characterized in that: The lower clamping plate includes a lower clamping plate body for fixing the main magnetic steel and the auxiliary magnetic steel, and two fixing parts that are bent and extended from one set of diagonal positions of the lower clamping plate body toward the direction of the vibration system.

5. The vibration sound-generating device according to claim 4, characterized in that: The two spring sheets are respectively located on both sides of the lower splint along the second direction, one end of the two spring sheets is respectively fixed to the two fixing parts, and the other ends of the two spring sheets are respectively connected to the shell to elastically support the vibration component in the shell.

6. The vibration sound-generating device according to claim 3, characterized in that: The vibration sound-generating device also includes a first flexible circuit board; the first flexible circuit board includes a lead connection portion stacked on the side of the connecting plate close to the second diaphragm, and an extended fixing portion bent and extended from the lead connection portion in a direction away from the second diaphragm and fixed to the side of the lower clamping plate away from the main magnetic steel; the lead connection portion is electrically connected to the second voice coil, and the extended fixing portion passes through the second avoidance hole, the through hole, and the first avoidance hole in sequence.

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

8. The vibration sound-generating device according to claim 7, characterized in that: The four auxiliary magnetic steels are divided into two first auxiliary magnetic steels distributed along the second direction and facing each other, and another two third auxiliary magnetic steels distributed along the third direction and facing each other; The vibration sound-generating device further includes two second flexible circuit boards respectively arranged around the two first secondary magnetic steels, wherein the orthographic projections of the two second flexible circuit boards and the two first secondary magnetic steels on the lower clamping plate do not overlap with each other; The second flexible circuit board is fixed to a side of the basin frame away from the first diaphragm.

9. The vibration sound-generating device according to claim 2, wherein: The lower clamping plate includes a first sub-lower clamping plate and a second sub-lower clamping plate; the main magnet and the secondary magnet are both fixed to the first sub-lower clamping plate, and the second sub-lower clamping plate is arranged on the side of the first sub-lower clamping plate close to the vibration system and is spaced around the outer periphery of the secondary magnet, and the projection of the second sub-lower clamping plate and the secondary magnet on a plane parallel to the first direction at least partially overlaps.

10. The vibration sound-generating device according to claim 1, wherein: The vibration sound-generating device further includes a voice coil accessory sandwiched between the second diaphragm and the second voice coil.

Images