Multifunctional sound production device

Abstract

The invention relates to the technical field of vibration motors, and provides a multifunctional sound production device, which comprises a shell, a vibration unit and a driving assembly for driving the vibration unit to vibrate along a first direction, and is characterized in that the vibration unit comprises a sound production monomer and an elastic piece for elastically supporting the sound production monomer on the shell; the sound production single body comprises a basin stand, a vibration system and a magnetic circuit system, the magnetic circuit system comprises a lower clamping plate and a magnetic steel assembly fixed on one side, close to the vibration system, of the lower clamping plate, and the lower clamping plate comprises a flat plate part bearing the magnetic steel assembly and a first wall part bending and extending from the flat plate part to the direction close to the vibration system; one end of the elastic piece is fixed with the first wall part, the other end of the elastic piece is fixed with the shell, the vibration unit further comprises a mass block arranged on one side, close to the vibration system, of the lower clamping plate, and the mass block abuts against the first wall part. According to the multifunctional sound production device, the falling deformation of the lower clamping plate can be reduced, and the resonant frequency F0 and the vibration quantity G can be adjusted more easily.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration motors, and in particular to a multifunctional 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, multifunctional sound-generating devices with both playback and vibration functions are now widely used in smart mobile devices.

[0003] The multifunctional sound-generating device mainly includes a shell, a vibration unit elastically supported in the shell, and a driving coil for driving the vibration unit to vibrate, wherein the vibration unit includes a sound-generating monomer for playing sound, and the sound-generating monomer mainly includes a basin frame fixed to the vibration system of the basin frame and a magnetic circuit system for driving the vibration system to vibrate, and the magnetic circuit system includes a lower clamping plate and a magnetic steel assembly fixed to the lower clamping plate.

[0004] In related art, the sound-generating unit, acting as a vibrator, is typically not equipped with an additional mass, or only with a mass on the lower clamping plate of the magnetic circuit system. This design makes it difficult to adjust the resonant frequency F0 and the acceleration response G value, and may interfere with the sound of the sound-generating unit, adversely affecting both the sound and vibration functions of the multifunctional sound-generating device. Furthermore, the lower clamping plate is typically composed of a uniformly thick plate-like structure that is bent to secure it to the elastic member. The thickness decreases near the bend, making it prone to deformation due to drops and lacking stability.

[0005] Therefore, it is necessary to provide a product that solves the above problems. Summary of the Invention

[0006] The object of the present invention is to provide a multifunctional sound-generating device, in which the F0 and G values ​​are easier to adjust, while making the structure of the lower splint more stable and reducing falling deformation.

[0007] The present invention also provides a multifunctional sound-generating device, which includes a housing, a vibration unit accommodated in the housing, and a driving component for driving the vibration unit to vibrate along a first direction; The vibration unit includes a sound-generating monomer and an elastic member that elastically supports the sound-generating monomer on the housing; the sound-generating monomer includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and generate sound, and the magnetic circuit system includes a lower clamping plate and a magnetic steel assembly fixed to the side of the lower clamping plate close to the vibration system; The lower clamping plate includes a flat plate portion supporting the magnetic steel assembly and a first wall portion extending from the flat plate portion in a direction close to the vibration system, one end of the elastic member is fixed to the first wall portion, and the other end is fixed to the housing; The vibration unit further includes a mass block disposed on a side of the lower clamping plate close to the vibration system, and the mass block abuts against the first wall portion.

[0008] Preferably, the mass block is made of stainless steel, low carbon steel, tungsten steel or plastic.

[0009] Preferably, the mass block includes a first mass block fixed to the side of the lower clamping plate close to the vibration system, the first mass block includes a main body fixed to the flat plate part and a first extension wall extending from the main body and arranged corresponding to the first wall part, the first extension wall is abutted and fixed to the first wall part.

[0010] Preferably, the mass block further includes a second mass block stacked on a side of the first mass block close to the vibration system and abutting against the first extension wall.

[0011] Preferably, the elastic member includes a fixing portion fixed to the first wall portion, a coupling portion fixed to the outer shell, and an elastic arm connecting the fixing portion and the coupling portion, the lower splint also includes a second wall portion bent and extended from the flat plate portion toward the direction close to the vibration system and arranged relative to the coupling portion, the first mass block includes a second extension wall extending from the main body portion and arranged corresponding to the second wall portion, the second extension wall is abutted and fixed to the second wall portion, the second mass block is located between the first extension wall and the second extension wall, and the two ends of the second mass block are respectively abutted against the first wall portion and the second wall portion.

[0012] Preferably, the number of the elastic members is two, and the two elastic members are arranged on opposite sides of the sound-emitting unit along the first direction. The number of the second mass blocks is two, and the two second mass blocks are arranged on opposite sides of the magnetic steel assembly along a second direction perpendicular to the first direction.

[0013] Preferably, the vibration system includes a diaphragm fixed to the basin frame and a voice coil that drives the diaphragm to vibrate along a third direction to produce sound, the first direction and the third direction are perpendicular to each other, the magnetic steel assembly includes a main magnet and a secondary magnet located on the outer periphery of the main magnet, the main magnet and the secondary magnet form a magnetic gap, and the voice coil is inserted and suspended in the magnetic gap.

[0014] Preferably, the main magnet is annular, and the driving assembly includes two groups of driving magnet assemblies fixed to the inner circumference of the main magnet and a driving coil fixed in the housing, the driving coil is arranged between the two groups of driving magnet assemblies, and the two groups of driving magnet assemblies are arranged on opposite sides of the main magnet along a direction perpendicular to the first direction, and each group of driving magnet assemblies includes three driving magnets arranged side by side along the first direction, wherein the three driving magnets in one group of driving magnet assemblies are arranged in a one-to-one correspondence with the three driving magnets in the other group of driving magnet assemblies; The magnetizing direction of the main magnetic steel is parallel to the third direction; the magnetizing directions of all the driving magnetic steels are perpendicular to the magnetizing direction of the main magnetic steel, wherein the magnetizing direction of the driving magnetic steel located in the middle of one group of driving magnetic assemblies is opposite to the magnetizing direction of the driving magnetic steel located in the middle of another group of driving magnetic assemblies, and the magnetizing direction of the driving magnetic steel located in the middle of any group of driving magnetic assemblies is the same as the magnetizing direction of the driving magnetic steels located on both sides of the other group of driving magnetic assemblies.

[0015] Preferably, the shell includes a sound outlet hole passing through it along the third direction and arranged opposite to the diaphragm, the sound unit also includes a ring-shaped seal, the shell also includes an inner edge surrounding the sound outlet hole, and the seal is clamped between the basin frame and the inner edge.

[0016] Preferably, the diaphragm includes a spherical top, a folding ring portion surrounding the spherical top, and an external fixing portion extending from the outer peripheral side of the folding ring portion and fixed to the basin frame, and the sound unit also includes a support member located between the external fixing portion and the sealing member, the support member includes a first supporting portion that is in contact with the external fixing portion, an extension portion that is bent and extended from the outer edge of the first supporting portion toward the direction close to the magnetic circuit system, and a second supporting portion that is bent and extended from the extension portion toward the direction away from the basin frame, and the first supporting portion, the extension portion and the second supporting portion are all fixed to the sealing member.

[0017] The new multifunctional sound-generating device of the present invention increases the strength near the bending part of the lower splint and reduces the falling deformation of the lower splint by arranging a mass block on the side of the lower splint close to the vibration system so that the mass block abuts against the first wall. At the same time, the arrangement of the mass block can make the resonance frequency F0 and the vibration value G value in the multifunctional sound-generating device easier to adjust, so that it has excellent vibration performance, reduces the mutual interference between sound and vibration, and improves the stability of the entire multifunctional sound-generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art in the art can also derive other drawings based on these drawings without inventive efforts. Among them: Figure 1 A three-dimensional diagram of a multifunctional sound-generating device provided by an embodiment of the present invention; Figure 2 An exploded schematic diagram of a multifunctional sound-generating device provided by an embodiment of the present invention; Figure 3 A schematic diagram of a partial structure of a multifunctional sound-generating device provided by an embodiment of the present invention; Figure 4 for Figure 3 Enlarged view of part B; Figure 5 A schematic diagram of magnetization of a magnetic steel component and a driving magnet component in a multifunctional sound-generating device provided by an embodiment of the present invention; Figure 6 for Figure 1 Sectional view along line AA; Figure 7 for Figure 6 Enlarged view of part C; The reference numerals in the accompanying drawings represent the following: 100. Multifunctional sound-generating device; 01, first direction; 02, second direction; 03, third direction; 1. Housing; 11. Upper cover; 111. Sound outlet; 112. Inner edge; 12. Lower cover; 2. Vibration unit; 21. Sounding unit; 211. Basin; 212. Vibration system; 2121. Diaphragm; 21211. Dome; 21212. Surrounding ring; 21213. External fixing part; 2122. Voice coil; 213. Magnetic circuit system; 2131. Lower clamping plate; 21311. Flat plate; 21312. First wall; 21313. Second wall; 21314. Through hole; 2132. Magnetic steel assembly; 21321. Main magnet; 21322. Auxiliary magnet; 21322a. Magnetic steel body; 21322b. Protrusion; 2133. Magnetic gap; 2134. Auxiliary pole core; 2135. Main pole core; 214. Seal; 215. Support member; 2151. First supporting part; 2152. Extension; 2153. Second supporting part. 22. Elastic member; 221. Fixing portion; 222. Joint portion; 223. Elastic arm; 23. Mass block; 231. First mass block; 2311. Main body; 23111. Groove; 2312. First extension wall; 2313. Second extension wall; 232. Second mass block; 3. Driving assembly; 31. Driving magnet assembly; 311. Driving magnet; 32. Driving coil; 4. The first FPC board; 5. Second FPC board. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1-7 As shown, this embodiment provides a multifunctional sound-generating device 100, which includes a shell 1, a vibration unit 2 accommodated in the shell 1, and a driving component 3 that drives the vibration unit 2 to vibrate along a first direction. The shell includes an upper cover 11 and a lower cover 12 covering the upper cover 11.

[0021] The vibration unit 2 includes a sound-emitting unit 21 and an elastic part 22 that elastically supports the sound-emitting unit 21 on the outer shell; the sound-emitting unit 21 includes a basin frame 211, a vibration system 212 fixed to the basin frame 211 and a magnetic circuit system 213 that drives the vibration system 212 to vibrate and produce sound. The magnetic circuit system 213 includes a lower splint 2131 and a magnetic steel assembly 2132 fixed to the lower splint 2131 close to the side of the vibration system 212.

[0022] The lower clamping plate 2131 includes a flat plate portion 21311 that supports the magnetic steel assembly 2132 and a first wall portion 21312 that bends and extends from the flat plate portion 21311 toward the direction close to the vibration system 212. One end of the elastic member 22 is fixed to the first wall portion 21312 and the other end is fixed to the outer shell 1. The vibration unit 2 also includes a mass block 23 arranged on the side of the lower clamping plate 2131 close to the vibration system 212, and the mass block 23 abuts against the first wall portion 21312.

[0023] The lower splint 2131 is usually composed of a plate-like structure of equal thickness and is fixed to the elastic member 22 by partial bending. By setting a mass block 23 on the side of the lower splint 2131 close to the vibration system 212, so that the mass block 23 abuts against the first wall portion 21312, the strength of the lower splint 2131 near the bending point can be increased, and the falling deformation of the lower splint 2131 can be reduced.

[0024] In addition, the setting of the mass block 23 can make the resonance frequency F0 and the vibration value G in the multifunctional sound-generating device easier to adjust, so that it has excellent vibration performance, reduces the mutual interference between sound and vibration, and improves the stability of the entire multifunctional sound-generating device.

[0025]

[0026] The above formula is a calculation formula for the resonant frequency, where F0 is the resonant frequency, Kms is the mechanical stiffness, and Mms is the mass of the vibration unit. It can be seen from the above formula that by adding a mass block 23 to the vibration unit, the mass Mms of the vibration unit can be increased, thereby reducing the resonant frequency F0 of the multifunctional sound-generating device. At the same time, by adjusting the size or position of the mass block 23, the target frequency can be matched more accurately, and the vibration can be optimized by adjusting F0.

[0027]

[0028] The above formula is a calculation formula for the quality factor, where Q is the quality factor; Rts is the DC impedance of the driving coil; B is the magnetic induction density; L is the effective length of the driving coil line; Cms is the compliance; Mms is the mass of the vibration unit (Mms). It can be seen from the above formula that the addition of the mass block 23 can change the quality factor Q and affect the vibration value G at the same time, so that the multifunctional sound-generating device can respond quickly and have a good vibration sense.

[0029] In some embodiments, the material of the mass block 23 can be stainless steel, low carbon steel, tungsten steel or plastic. The material selection range of the mass block is wide, which can increase the feasibility of the implementation of the solution.

[0030] Further, such as Figure 3 As shown, the mass block 23 includes a first mass block 231 fixed to the side of the lower splint 2131 close to the vibration system 212, and the first mass block 231 includes a main body 2311 fixed to the flat plate 21311 and a first extension wall 2312 extending from the main body 2311 and corresponding to the first wall 21312. The first extension wall 2312 is fixed in abutment with the first wall 21312. By setting the first mass block 231 and setting the first extension wall 2312 of the first mass block 231 in abutment with the first wall 21312 of the lower splint 2131, the strength of the bending part of the lower splint 2131 can be improved to prevent deformation during vibration and reduce the possibility of the lower splint 2131 falling and deforming. Furthermore, the setting of the first mass block 231 can further increase the vibration G value of the vibration unit 2, so that the multifunctional sound-generating device 100 has a better vibration sense.

[0031] Further, such as Figure 3As shown, the mass block 23 also includes a second mass block 232 stacked on the first mass block 231 near the vibration system 212 and abutting against the first extension wall 2312. The addition of the second mass block 232 can further enhance the strength of the bending part of the first mass block 231 and the lower splint 2131, while reducing the possibility of the lower splint 2131 and the first mass block 231 falling and deforming.

[0032] In this embodiment, the number of the elastic members 22 is two, and the two elastic members 22 are arranged on opposite sides of the sound-emitting unit 21 along the first direction. Figure 2-3 As shown, the elastic member is a "straight spring". Of course, in some other embodiments, the elastic member can also be other shapes such as a "V-shaped spring" or a "C-shaped spring". Each elastic member 22 includes a fixed portion 221 fixed to the first wall portion 21312, a connecting portion 222 fixed to the outer shell, and an elastic arm 223 connecting the fixed portion 221 and the connecting portion 222.

[0033] Furthermore, the lower splint 2131 also includes a second wall portion 21313 that bends and extends from the flat plate portion 21311 in a direction close to the vibration system 212 and is arranged at a relative interval with the joint portion 222. The second wall portion 21313 is arranged so that it can collide with the joint portion 222 during the vibration process, and can play a role in limiting and protecting the sound unit 21.

[0034] Furthermore, the first mass block 231 includes a second extension wall 2313 extending from the main body 2311 and corresponding to the second wall portion 21313. The second extension wall 2313 is abutted and fixed to the second wall portion 21313. The abutment and fixation of the second extension wall 2313 and the second wall portion 21313 can enhance the strength of the bending part of the lower splint 2131. On the one hand, the possibility of the lower splint 2131 falling and deforming can be reduced. On the other hand, during the vibration process, when the second wall portion 21313 collides with the joint 222, the second wall portion 21313 can be prevented from being deformed and affecting the vibration of the vibration unit 2, and the sound-emitting unit 21 can be prevented from being damaged due to the deformation of the second wall portion 21313.

[0035] In this embodiment, if Figure 3As shown, the second mass block 232 is located between the first extension wall 2312 and the second extension wall 2313, and further, there are two second mass blocks 232, and the second mass blocks 232 are long block structures. Of course, in some other embodiments, the second mass blocks 232 can also be other shapes. The two second mass blocks 232 are arranged on opposite sides of the magnetic steel assembly 2132 along the second direction 02 perpendicular to the first direction 01, and the two ends of each second mass block 232 are respectively abutted against the first wall portion 21312 and the second wall portion 21313. By adding the second mass block 232 to the vibration unit 2, not only can the strength of the bending part of the lower splint 2131 and the first mass block 231 be further increased and the falling deformation be reduced, but also the mass of the vibration unit 2 can be improved, thereby reducing the resonance frequency F0 of the multifunctional sound-emitting device. At the same time, by adjusting the size or position of the second mass block 232, the target frequency can be matched more accurately, and the vibration can be optimized by adjusting F0. In addition, the addition of the second mass block 232 can flexibly adjust the vibration G value without making special adjustments to the design of the core components of the multifunctional sound-emitting device.

[0036] like Figure 6 As shown, the vibration system 212 includes a diaphragm 2121 fixed to the basin frame 211 and a voice coil 2122 that drives the diaphragm 2121 to vibrate along a third direction to produce sound. The third direction 03 is perpendicular to the first direction 01 and the second direction 02. The magnetic steel assembly 2132 includes a main magnet 21321 and a secondary magnet 21322 located on the outer peripheral side of the main magnet 21321. The main magnet 21321 and the secondary magnet 21322 are spaced apart to form a magnetic gap 2133. The voice coil 2122 is inserted and suspended in the magnetic gap 2133. The magnetic field generated by the voice coil 2122 after being energized interacts with the magnetic steel assembly 2132 to drive the diaphragm 2121 to vibrate and produce sound.

[0037] The multifunctional sound-generating device 100 further includes a first FPC board 4 electrically connected to the voice coil 2122 and a second FPC board 5 electrically connected to the drive coil 32. The first FPC board 4 is fixed to the side of the frame 211 near the lower clamping plate 2131, and the second FPC board 5 is fixed to the lower cover 12. The first FPC board 4 is used to electrically connect an external circuit to the voice coil 2122, and the second FPC board 5 is used to electrically connect an external circuit to the drive coil 32.

[0038] Further, such as Figure 3 、 Figure 5As shown, the main magnet 21321 is annular. The annular design of the main magnet 21321 can be an integral annular structure; it can also be a ring structure formed by splicing multiple sub-magnets end to end; it can also be a broken annular structure with a gap. The gap can be one or multiple gaps spaced apart. The drive assembly 3 includes two sets of drive magnet assemblies 31 fixed to the inner circumference of the main magnet 21321 and a drive coil 32 fixed within the housing. The drive coil 32 is spaced apart between the two sets of drive magnet assemblies 31. In this embodiment, the drive coil 32 is fixed to the lower cover 12. The lower clamping plate 2131 also includes a through hole 21314 extending therethrough in the third direction 03. At least a portion of the drive coil 32 passes through the through hole 21314 and is spaced apart from the drive magnet assembly 31. Two sets of driving magnet assemblies 31 are arranged on opposite sides of the main magnet 21321, perpendicular to the first direction O1. Each set of driving magnet assemblies 31 includes three driving magnets arranged side by side along the first direction O1. The three driving magnets 311 in one set of driving magnet assemblies 31 correspond to the three driving magnets 311 in the other set of driving magnet assemblies 31. When energized, the driving coil 32 generates a force acting on the six driving magnets 311, driving the vibration unit 2 to vibrate in the first direction O1.

[0039] With this design, the driving magnet assembly 31 is fixed to integrate the magnetic circuit system 213 with the magnetic steel assembly 2132 to improve the overall quality and driving force of the vibration unit 2, thereby improving the BL value and vibration sensation of the multifunctional sound-generating device 100 and improving its performance.

[0040] Furthermore, the magnetizing direction of the main magnetic steel 21321 is parallel to the third direction 03; the magnetizing direction of all the driving magnetic steels 311 is perpendicular to the magnetizing direction of the main magnetic steel 21321, wherein the magnetizing direction of the driving magnetic steel 311 located in the middle of one group of driving magnetic assemblies 31 is opposite to the magnetizing direction of the driving magnetic steel 311 located in the middle of another group of driving magnetic assemblies 31, and the magnetizing direction of the driving magnetic steel 311 located in the middle of any group of driving magnetic assemblies 31 is the same as the magnetizing direction of the driving magnetic steels 311 located on both sides of the other group of driving magnetic assemblies 31. Specifically, the driving magnetic steel 311 is magnetized in the second direction 02, and the main magnetic steel 21321 is magnetized in the third direction 03. The magnetizing direction of the driving magnetic steel 311 located in the middle of each group of driving magnetic assemblies 31 is opposite to the driving coil 32, and the magnetizing direction of each magnetic steel is as follows: Figure 5 As shown by the dotted line in .

[0041] In this embodiment, if Figure 3 、 Figure 5As shown, four auxiliary magnets 21322 are provided, and the four auxiliary magnets 21322 respectively include a magnet body 21322a and a protrusion 21322b formed by the middle area of ​​the magnet body 21322a protruding and extending in the direction away from the main magnet 21321. The setting of the protrusion 21322b can increase the volume of the auxiliary magnet 21322, thereby improving the magnetic field strength of the entire magnetic circuit system 213; the main body 2311 of the first mass block 231 is provided with a groove 23111 for avoiding the protrusion 21322b, and the bottom of the groove 23111 extends and protrudes in the direction close to the elastic member 22. The first mass block 231 is designed in this way to play the role of vibration limiter, and at the same time can further protect the structure of the sound unit 21.

[0042] like Figure 6 As shown, the magnetic circuit system 213 further includes a secondary pole core 2134 covering the secondary magnet 21322 close to the diaphragm 2121 and a main pole core 2135 covering the main magnet 21321 close to the diaphragm 2121 . The secondary pole core 2134 is integrally formed with the basin frame 211 .

[0043] like Figure 2 、 Figure 6 As shown, the upper cover 11 in the outer shell 1 includes a sound hole 111 passing through it along a third direction and arranged opposite to the diaphragm 2121, the sound unit 21 also includes a ring-shaped seal 214, and the upper cover 11 in the outer shell 1 also includes an inner edge 112 surrounding the sound hole 111, and the seal 214 is clamped between the basin frame 211 and the inner edge 112. The seal 214 is used for sealing to prevent dust or water from entering the multifunctional sound-emitting device. In addition, during the sound-emitting process of the multifunctional sound-emitting device 100, the diaphragm 2121 can be aligned with the sound hole 111 to prevent sound leakage.

[0044] like Figure 6-7 As shown, the diaphragm 2121 includes a spherical top 21211, a folding ring portion 21212 surrounding the spherical top 21211, and an external fixing portion 21213 extending from the outer peripheral side of the folding ring portion 21212 and fixed to the basin frame 211. The sound unit 21 also includes a support member 215 located between the external fixing portion 21213 and the sealing member 214. The support member 215 includes a first supporting portion 2151 that is in contact with the external fixing portion 21213, an extension portion 2152 that is bent and extended from the outer edge of the first supporting portion 2151 toward the direction close to the magnetic circuit system 213, and a second supporting portion 2153 that is bent and extended from the extension portion 2152 toward the direction away from the basin frame 211. The first supporting portion 2151, the extension portion 2152 and the second supporting portion 2153 are all fixed to the sealing member 214. With this design, the combination of the sealing member 214 and the support member 215 is more stable, thereby improving the stability of the waterproof and dustproof performance of the multifunctional sound-emitting device.

[0045] In the above structure, by setting a mass block 23 on the side of the lower splint 2131 close to the vibration system 212, so that the mass block 23 abuts against the first wall portion 21312, the strength near the bending part of the lower splint 2131 can be increased, and the falling deformation of the lower splint 2131 can be reduced. At the same time, the setting of the mass block 23 can make the resonance frequency F0 and the vibration value G value in the multifunctional sound-generating device 100 easier to adjust, so that it has excellent vibration performance, reduces the mutual interference between sound and vibration, and improves the stability of the entire multifunctional sound-generating device.

[0046] The above are merely embodiments of the present invention. It should be pointed out that those skilled in the art in the field of the present invention may make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A multifunctional sound-generating device comprising a housing, a vibration unit housed in the housing, and a driving assembly for driving the vibration unit to vibrate in a first direction; The vibration unit includes a sound-generating monomer and an elastic member that elastically supports the sound-generating monomer on the housing; the sound-generating monomer includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and generate sound, and the magnetic circuit system includes a lower clamping plate and a magnetic steel assembly fixed to the side of the lower clamping plate close to the vibration system; The lower clamping plate includes a flat plate portion supporting the magnetic steel assembly and a first wall portion extending from the flat plate portion in a direction close to the vibration system, one end of the elastic member is fixed to the first wall portion, and the other end is fixed to the housing; It is characterized in that The vibration unit further includes a mass block disposed on a side of the lower clamping plate close to the vibration system, and the mass block abuts against the first wall portion.

2. The multifunctional sound-generating device according to claim 1, characterized in that: The material of the mass block is stainless steel, low carbon steel, tungsten steel or plastic.

3. The multifunctional sound-generating device according to claim 1, characterized in that: The mass block includes a first mass block fixed to the side of the lower clamping plate close to the vibration system, the first mass block includes a main body fixed to the flat plate and a first extension wall extending from the main body and corresponding to the first wall, the first extension wall is abutted and fixed to the first wall.

4. The multifunctional sound-generating device according to claim 3, characterized in that: The mass block further includes a second mass block stacked on a side of the first mass block close to the vibration system and abutting against the first extension wall.

5. The multifunctional sound-generating device according to claim 4, characterized in that: The elastic member includes a fixing portion fixed to the first wall portion, a coupling portion fixed to the outer shell, and an elastic arm connecting the fixing portion and the coupling portion. The lower splint also includes a second wall portion that is bent and extended from the flat plate portion toward the direction close to the vibration system and is arranged relative to the coupling portion. The first mass block includes a second extension wall extending from the main body portion and corresponding to the second wall portion. The second extension wall is fixed in abutment with the second wall portion. The second mass block is located between the first extension wall and the second extension wall, and the two ends of the second mass block are respectively in abutment with the first wall portion and the second wall portion.

6. The multifunctional sound-generating device according to claim 4, characterized in that: There are two elastic members, and the two elastic members are arranged on opposite sides of the sound-emitting unit along the first direction. There are two second mass blocks, and the two second mass blocks are arranged on opposite sides of the magnetic steel assembly along a second direction perpendicular to the first direction.

7. The multifunctional sound-generating device according to claim 1, characterized in that: The vibration system includes a diaphragm fixed to the basin frame and a voice coil that drives the diaphragm to vibrate along a third direction to produce sound. The first direction and the third direction are perpendicular to each other. The magnetic steel assembly includes a main magnet and a secondary magnet located on the outer periphery of the main magnet. The main magnet and the secondary magnet form a magnetic gap, and the voice coil is inserted and suspended in the magnetic gap.

8. The multifunctional sound-generating device according to claim 7, characterized in that: The main magnet is annular, and the driving assembly includes two groups of driving magnet assemblies fixed to the inner circumference of the main magnet and a driving coil fixed in the housing. The driving coil is arranged between the two groups of driving magnet assemblies. The two groups of driving magnet assemblies are arranged on opposite sides of the main magnet along a direction perpendicular to the first direction. Each group of driving magnet assemblies includes three driving magnets arranged side by side along the first direction, wherein the three driving magnets in one group of driving magnet assemblies are arranged in a one-to-one correspondence with the three driving magnets in the other group of driving magnet assemblies. The magnetizing direction of the main magnetic steel is parallel to the third direction; the magnetizing directions of all the driving magnetic steels are perpendicular to the magnetizing direction of the main magnetic steel, wherein the magnetizing direction of the driving magnetic steel located in the middle of one group of driving magnetic assemblies is opposite to the magnetizing direction of the driving magnetic steel located in the middle of another group of driving magnetic assemblies, and the magnetizing direction of the driving magnetic steel located in the middle of any group of driving magnetic assemblies is the same as the magnetizing direction of the driving magnetic steels located on both sides of the other group of driving magnetic assemblies.

9. The multifunctional sound-generating device according to claim 7, characterized in that: The shell includes a sound outlet hole that passes through it along the third direction and is arranged opposite to the diaphragm. The sound unit also includes a ring-shaped seal. The shell also includes an inner edge surrounding the sound outlet hole. The seal is clamped between the basin frame and the inner edge.

10. The multifunctional sound-generating device according to claim 9, characterized in that: The diaphragm includes a spherical top, a folding ring portion surrounding the spherical top, and an external fixing portion extending from the outer peripheral side of the folding ring portion and fixed to the basin frame. The sound unit also includes a support member located between the external fixing portion and the sealing member. The support member includes a first supporting portion that is in contact with the external fixing portion, an extension portion that is bent and extended from the outer edge of the first supporting portion toward the direction close to the magnetic circuit system, and a second supporting portion that is bent and extended from the extension portion toward the direction away from the basin frame. The first supporting portion, the extension portion and the second supporting portion are all fixed to the sealing member.

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