Multifunctional sound production device

Abstract

The present application relates to the technical field of vibration motor, and provides a multifunctional sound generating device, which comprises a shell, a vibration unit, a driving assembly for driving the vibration unit to vibrate in a first direction, the vibration unit comprising a sound generating unit and an elastic piece for elastically supporting the sound generating unit to the shell; the sound generating unit comprises a frame, a vibration system and a magnetic circuit system, the magnetic circuit system comprising a lower clamping plate, a magnetic steel assembly fixed to the lower clamping plate and close to the vibration system, the lower clamping plate comprising a flat plate part for bearing the magnetic steel assembly and a first wall part bent and extended from the flat plate part and close to the vibration system, one end of the elastic piece is fixed to the first wall part and the other end is fixed to the shell, the vibration unit further comprises a mass block arranged on the side of the lower clamping plate close to the vibration system, and the mass block is in abutment with the first wall part. The multifunctional sound generating device can reduce the falling deformation of the lower clamping plate, and can easily adjust the resonance frequency F0 and the vibration amount G value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vibration motor, in particular to a multifunctional sound producing device. BACKGROUND

[0002] With the continuous innovation of smart mobile devices, it is more and more popular with users, the most common is mobile phone, tablet and handheld game console, etc., and the design of playing function and vibration function in the smart mobile device has become a basic function, therefore, the multifunctional sound producing device with playing function and vibration function is widely applied to the smart mobile device.

[0003] The multifunctional sound producing device mainly comprises 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 comprises a sound producing unit for playing sound, the sound producing unit mainly comprises a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, the magnetic circuit system comprises a lower clamping plate and a magnetic steel assembly fixed to the lower clamping plate.

[0004] In the related art, the sound producing unit as a vibrator usually does not have an additional mass block, or only has a mass block on the lower clamping plate of the magnetic circuit system, which makes it difficult to adjust the resonance frequency F0 and the acceleration response G value, and may interfere with the sound production of the sound producing unit, and adversely affect the sound production and vibration function of the multifunctional sound producing device. In addition, the lower clamping plate is usually fixed to the elastic member by bending the equal-thickness plate structure part, and the thickness of the bending part is thin, which is prone to drop deformation and has poor stability.

[0005] Therefore, it is necessary to provide a product to solve the above problems. SUMMARY

[0006] The present application aims to provide a multifunctional sound producing device, the F0 and G value of the multifunctional sound producing device are easier to adjust, and the structure of the lower clamping plate is more stable, reducing the drop deformation.

[0007] The present application also provides a multifunctional sound producing device, which comprises a shell, a vibration unit received in the shell, a driving assembly for driving the vibration unit to vibrate in a first direction;

[0008] The vibration unit comprises a sound producing unit and an elastic member for elastically supporting the sound producing unit in the shell; the sound producing unit comprises a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, the magnetic circuit system comprises a lower clamping plate, and a magnetic steel assembly fixed to the lower clamping plate near the side of the vibration system;

[0009] The lower clamping plate comprises a flat plate part bearing the magnetic steel assembly and a first wall part extending from the flat plate part towards the vibration system, one end of the elastic member is fixed to the first wall part and the other end is fixed to the shell;

[0010] The vibration unit further comprises a mass block arranged on the side of the lower clamping plate close to the vibration system, and the mass block abuts against the first wall part.

[0011] Preferably, the mass block is made of stainless steel, low-carbon steel, tungsten steel or plastic.

[0012] Preferably, the mass block comprises a first mass block fixed on the side of the lower clamping plate close to the vibration system, the first mass block comprises a main body part fixed to the flat plate part and a first extension wall extending from the main body part and arranged corresponding to the first wall part, and the first extension wall abuts against and is fixed to the first wall part.

[0013] Preferably, the mass block further comprises a second mass block arranged on the side of the first mass block close to the vibration system and abutting against the first extension wall.

[0014] Preferably, the elastic member comprises a fixed part fixed to the first wall part, a combination part fixed to the shell and an elastic arm connecting the fixed part and the combination part, the lower clamping plate further comprises a second wall part extending from the flat plate part towards the vibration system and arranged opposite to the combination part, the first mass block comprises a second extension wall extending from the main body part and arranged corresponding to the second wall part, the second extension wall abuts against and is fixed to the second wall part, the second mass block is located between the first extension wall and the second extension wall, and two ends of the second mass block abut against the first wall part and the second wall part respectively.

[0015] Preferably, the number of elastic members is two, the two elastic members are arranged on opposite sides of the sound production unit along the first direction, and the number of second mass blocks is two, the two second mass blocks are arranged on opposite sides of the magnetic steel assembly along a second direction perpendicular to the first direction.

[0016] Preferably, the vibration system comprises a diaphragm fixed to the yoke and a voice coil driving 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 comprises a main magnetic steel and a secondary magnetic steel located on the outer circumferential side of the main magnetic steel, the main magnetic steel and the secondary magnetic steel are spaced apart to form a magnetic gap, and the voice coil is inserted and suspended in the magnetic gap.

[0017] Preferably, the main magnetic steel is annular, the driving assembly comprises two groups of driving magnet assemblies fixed to the inner circumferential side of the main magnetic steel and a driving coil fixed to the shell, 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 magnetic steel in a direction perpendicular to the first direction, each group of driving magnet assemblies comprises three driving magnetic steels arranged side by side in the first direction, and the three driving magnetic steels in one group of driving magnet assemblies are arranged in one-to-one correspondence with the three driving magnetic steels in the other group of driving magnet assemblies.

[0018] The magnetization direction of the main magnetic steel is parallel to the third direction, the magnetization directions of all the driving magnetic steels are perpendicular to the magnetization direction of the main magnetic steel, the magnetization direction of the driving magnetic steel in the middle of one group of driving magnet assemblies is opposite to the magnetization direction of the driving magnetic steel in the middle of the other group of driving magnet assemblies, and the magnetization direction of the driving magnetic steel in the middle of any one group of driving magnet assemblies is the same as the magnetization directions of the driving magnetic steels on the two sides of the other group of driving magnet assemblies.

[0019] Preferably, the shell comprises a sound outlet hole penetrating through the shell in the third direction and arranged opposite to the diaphragm, the sound emitting unit further comprises a sealing member in the form of a ring, and the shell further comprises an inner edge surrounding the sound outlet hole, and the sealing member is clamped between the yoke and the inner edge.

[0020] Preferably, the diaphragm comprises a spherical top, a folded ring portion surrounding the spherical top, and an outer fixed portion extending from the outer circumferential side of the folded ring portion and fixed to the yoke, the sound emitting unit further comprises a support between the outer fixed portion and the sealing member, the support comprises a first supporting portion abutting the outer fixed portion, an extension portion bent and extending from the outer edge of the first supporting portion towards the magnetic circuit system, and a second supporting portion bent and extending from the extension portion away from the yoke, and the first supporting portion, the extension portion and the second supporting portion are fixed to the sealing member.

[0021] The novel multifunctional sound emitting device can increase the strength of the vicinity of the bending portion of the lower clamping plate, reduce the falling deformation of the lower clamping plate, and make the resonance frequency F0 and the vibration amount G value of the multifunctional sound emitting device more easily adjustable, so that the multifunctional sound emitting device has excellent vibration performance, reduces the mutual interference between sound emission and vibration, and improves the stability of the entire multifunctional sound emitting device. BRIEF DESCRIPTION OF DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0023] Figure 1 A perspective view of the multifunctional sound-generating device provided in an embodiment of the present invention;

[0024] Figure 2 An exploded view of the multifunctional sound-generating device provided in an embodiment of the present invention;

[0025] Figure 3 This is a partial three-dimensional schematic diagram of the multifunctional sound-generating device provided in an embodiment of the present invention;

[0026] Figure 4 for Figure 3 Enlarged view of section B;

[0027] Figure 5 A schematic diagram of the magnetization of the magnet assembly and the driving magnet assembly in the multifunctional sound-generating device provided in the embodiment of the present invention;

[0028] Figure 6 for Figure 1 Cross-sectional view of line AA in the middle;

[0029] Figure 7 for Figure 6 Enlarged view of section C;

[0030] The labels in the attached diagram are as follows:

[0031] 100. Multifunctional sound-generating device;

[0032] 01. First Direction; 02. Second Direction; 03. Third Direction;

[0033] 1. Outer shell; 11. Top cover; 111. Sound outlet; 112. Inner edge; 12. Bottom cover;

[0034] 2. Vibration unit;

[0035] 21, sound unit; 211, frame; 212, vibration system; 2121, diaphragm; 21211, ball top; 21212, folded ring part; 21213, outer fixed part; 2122, voice coil; 213, magnetic circuit system; 2131, lower clamp plate; 21311, flat plate part; 21312, first wall part; 21313, second wall part; 21314, through hole; 2132, magnetic steel assembly; 21321, main magnetic steel; 21322, auxiliary magnetic steel; 21322a, magnetic steel body; 21322b, protruding part; 2133, magnetic gap; 2134, auxiliary pole core; 2135, main pole core; 214, sealing member; 215, support member; 2151, first support part; 2152, extension part; 2153, second support part;

[0036] 22, elastic member; 221, fixed part; 222, combined part; 223, elastic arm;

[0037] 23, mass; 231, first mass; 2311, main body part; 23111, recess; 2312, first extension wall; 2313, second extension wall; 232, second mass;

[0038] 3, drive assembly; 31, drive magnetic steel assembly; 311, drive magnetic steel; 32, drive coil;

[0039] 4, first FPC board;

[0040] 5, second FPC board. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art of the present application without creative work fall within the protection scope of the present application.

[0042] As shown in the drawings, Figures 1-7 The present embodiment provides a multifunctional sound device 100, which comprises a housing 1, a vibration unit 2 accommodated in the housing 1, a drive assembly 3 for driving the vibration unit 2 to vibrate in a first direction, and the housing comprises an upper cover 11 and a lower cover 12 covering the upper cover 11.

[0043] The vibration unit 2 comprises a sound emitting unit 21 and an elastic member 22 for elastically supporting the sound emitting unit 21 to the shell; the sound emitting unit 21 comprises a frame 211, a vibration system 212 fixed to the frame 211 and a magnetic circuit system 213 for driving the vibration system 212 to vibrate and emit sound, the magnetic circuit system 213 comprises a lower clamping plate 2131 and a magnetic steel assembly 2132 fixed to the lower clamping plate 2131 near the vibration system 212.

[0044] The lower clamping plate 2131 comprises a flat plate part 21311 for bearing the magnetic steel assembly 2132 and a first wall part 21312 bent and extended from the flat plate part 21311 towards the vibration system 212, one end of the elastic member 22 is fixed to the first wall part 21312 and the other end is fixed to the shell 1, the vibration unit 2 further comprises a mass block 23 arranged on the side of the lower clamping plate 2131 near the vibration system 212, the mass block 23 abuts against the first wall part 21312.

[0045] The lower clamping plate 2131 is usually made of a plate structure with equal thickness and is fixed to the elastic member 22 by partial bending, by arranging the mass block 23 on the side of the lower clamping plate 2131 near the vibration system 212 and making the mass block 23 abut against the first wall part 21312, the strength of the lower clamping plate 2131 near the bending part can be increased and the falling deformation of the lower clamping plate 2131 can be reduced.

[0046] In addition, the arrangement of the mass block 23 can make the resonance frequency F0 and the vibration amount G value of the multifunctional sound emitting device more easily adjustable, so that the multifunctional sound emitting device has excellent vibration performance, the mutual interference between sound emission and vibration is reduced, and the stability of the whole multifunctional sound emitting device is improved.

[0047]

[0048] The above formula is a calculation formula of the resonance frequency, wherein F0 represents the resonance frequency, Kms represents the mechanical stiffness, and Mms represents the mass of the vibration unit. According to the above formula, the mass Mms of the vibration unit can be increased by arranging the mass block 23 in the vibration unit, so as to reduce the resonance frequency F0 of the multifunctional sound emitting device, and the target frequency can be matched more accurately by adjusting the size or position of the mass block 23, and the vibration can be optimized by adjusting F0.

[0049]

[0050] The above formula is a calculation formula of the quality factor, wherein Q represents the quality factor, Rts represents the direct current impedance of the driving coil, B represents the magnetic induction density, L represents the effective length of the driving coil wire, Cms represents the compliance, and Mms represents the mass of the vibration unit (Mms). According to the above formula, the quality factor Q can be changed by arranging the mass block 23, and the vibration amount G value is also affected, so that the multifunctional sound emitting device can respond quickly and has good vibration feeling.

[0051] In some embodiments, the material of the mass 23 can be stainless steel, low carbon steel, tungsten steel or plastic, and the material of the mass can be selected from a wide range, which can increase the feasibility of the implementation of the scheme.

[0052] Further, as shown in Figure 3 The mass 23 includes a first mass 231 fixed to one side of the lower clamping plate 2131 close to the vibration system 212, the first mass 231 includes a main body 2311 fixed to the flat plate portion 21311 and a first extension wall 2312 extending from the main body 2311 and corresponding to the first wall portion 21312, the first extension wall 2312 is fixed in abutment with the first wall portion 21312, by setting the first mass 231 and abutting the first extension wall 2312 of the first mass 231 and the first wall portion 21312 of the lower clamping plate 2131, the strength of the bending portion of the lower clamping plate 2131 can be improved, preventing deformation during vibration, while reducing the possibility of falling deformation of the lower clamping plate 2131, further the setting of the first mass 231 can further increase the vibration G value of the vibration unit 2, so that the multifunctional sound generating device 100 has more excellent vibration feeling.

[0053] Further, as shown in Figure 3 The mass 23 further includes a second mass 232 stacked on the first mass 231 close to the vibration system 212 and in abutment with the first extension wall 2312, the addition of the second mass 232 can further enhance the strength of the bending portion of the first mass 231 and the lower clamping plate 2131, while reducing the possibility of falling deformation of the lower clamping plate 2131 and the first mass 231.

[0054] In the present embodiment, the number of elastic members 22 is two, the two elastic members 22 are arranged on opposite sides of the sound generating unit 21 along the first direction, as shown in Figures 2-3 The elastic member is a "straight spring", of course, in some other embodiments, the elastic member can also be a "V-shaped spring" or a "C-shaped spring" or other shapes, each elastic member 22 includes a fixed portion 221 fixed to the first wall portion 21312, a combination portion 222 fixed to the housing, and a spring arm 223 connecting the fixed portion 221 and the combination portion 222.

[0055] Further, the lower clamping plate 2131 further includes a second wall portion 21313 bent and extended from the flat plate portion 21311 towards the vibration system 212 and arranged in opposite spaced relation with the combination portion 222, the second wall portion 21313 can collide with the combination portion 222 during vibration, which can play a limiting and protecting role for the sound generating unit 21.

[0056] Further, the first mass 231 includes a second extension wall 2313 extending from the main body 2311 and arranged corresponding to the second wall portion 21313, and the second extension wall 2313 is fixed in abutment with the second wall portion 21313. The abutment of the second extension wall 2313 and the second wall portion 21313 can enhance the strength of the bent portion of the lower clamping plate 2131, thereby reducing the possibility of deformation of the lower clamping plate 2131 due to falling, and preventing the second wall portion 21313 from being deformed and affecting the vibration of the vibration unit 2 and preventing damage to the sound generating unit 21 due to deformation of the second wall portion 21313.

[0057] In the present embodiment, as shown in Figure 3 The second mass 232 is located between the first extension wall 2312 and the second extension wall 2313, and further, the number of the second mass 232 is two, and the second mass 232 is a long strip-shaped structure. Of course, in some other embodiments, the second mass 232 can also be other shapes. The two second masses 232 are arranged on opposite sides of the magnetic steel assembly 2132 along a second direction 02 perpendicular to the first direction 01, and the two ends of each second mass 232 are in abutment with the first wall portion 21312 and the second wall portion 21313, respectively. By additionally increasing the second mass 232 in the vibration unit 2, the strength of the bent portion of the lower clamping plate 2131 and the first mass 231 can be further increased, the falling deformation can be reduced, the mass of the vibration unit 2 can be increased, thereby reducing the resonance frequency F0 of the multifunctional sound generating device, and by adjusting the size or position of the second mass 232, the target frequency can be more accurately matched, the vibration can be optimized by adjusting F0, and in addition, the second mass 232 can be flexibly adjusted without the need for additional adjustment of the core component design of the multifunctional sound generating device.

[0058] As shown in Figure 6 The vibration system 212 includes a diaphragm 2121 fixed to the yoke 211 and a voice coil 2122 driving the diaphragm 2121 to vibrate and sound along a third direction 03, and the third direction 03 is perpendicular to the first direction 01 and the second direction 02. The magnetic steel assembly 2132 includes a main magnetic steel 21321 and a secondary magnetic steel 21322 located on the outer peripheral side of the main magnetic steel 21321, and the main magnetic steel 21321 and the secondary magnetic steel 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 interacts with the magnetic steel assembly 2132 to drive the diaphragm 2121 to vibrate and sound.

[0059] The multifunctional sound production device 100 further comprises a first FPC board 4 electrically connected with the voice coil 2122 and a second FPC board 5 electrically connected with the drive coil 32, the first FPC board 4 is fixed to the yoke 211 near one side of 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 the external circuit with the voice coil 2122, and the second FPC board 5 is used to electrically connect the external circuit with the drive coil 32.

[0060] Further, as shown in Figure 3 、 Figure 5 , the main magnetic steel 21321 is annular, and the annular design of the main magnetic steel 21321 can be a structure in which the whole is annular; or can be an annular structure formed by splicing a plurality of sub-magnetic steel assemblies; or can be a broken annular structure with a notch, and the notch can be designed as one or a plurality of notches arranged at intervals. The drive assembly 3 comprises two groups of drive magnet assemblies 31 fixed to the inner circumferential side of the main magnetic steel 21321 and a drive coil 32 fixed in the housing, and the drive coil 32 is arranged at intervals between the two groups of drive magnet assemblies 31. In this embodiment, the drive coil 32 is fixed to the lower cover 12, and the lower clamping plate 2131 further comprises a through hole 21314 penetrating the lower clamping plate 2131 along the third direction 03, and at least part of the drive coil 32 passes through the through hole 21314 and is spaced apart from the drive magnet assembly 31. The two groups of drive magnet assemblies 31 are arranged on opposite sides of the main magnetic steel 21321 along a direction perpendicular to the first direction 01, and each group of drive magnet assemblies 31 comprises three drive magnetic steels arranged side by side along the first direction 01, and the three drive magnetic steels 311 in one group of drive magnet assemblies 31 are arranged in one-to-one correspondence with the three drive magnetic steels 311 in the other group of drive magnet assemblies 31. The drive coil 32 generates a force after being energized, and the drive vibration unit 2 vibrates along the first direction 01.

[0061] By designing in this way, the drive magnet assembly 31 is fixed to integrate the magnetic circuit system 213 and the magnetic steel assembly 2132, so as to improve the overall quality and driving force of the vibration unit 2, thereby improving the BL value and vibration feeling of the multifunctional sound production device 100, and improving the performance of the multifunctional sound production device 100.

[0062] Further, the magnetization direction of the main magnetic steel 21321 is parallel to the third direction 03; the magnetization direction of all the driving magnetic steels 311 is perpendicular to the magnetization direction of the main magnetic steel 21321, the magnetization direction of the driving magnetic steel 311 in the middle of one group of driving magnetic steel assemblies 31 is opposite to the magnetization direction of the driving magnetic steel 311 in the middle of the other group of driving magnetic steel assemblies 31, the magnetization direction of the driving magnetic steel 311 in the middle of any one group of driving magnetic steel assemblies 31 is the same as the magnetization direction of the driving magnetic steel 311 on both sides of the other group of driving magnetic steel 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 magnetization direction of the driving magnetic steel 311 in the middle of each group of driving magnetic steel assemblies 31 is opposite to the driving coil 32, and the magnetization direction of each magnetic steel is shown by the dashed line in Figure 5 .

[0063] In the embodiment, as shown in Figure 3 , Figure 5 , the auxiliary magnetic steel 21322 is provided with four, and each of the four auxiliary magnetic steels 21322 includes a magnetic steel body 21322a and a protruding portion 21322b formed by the middle region of the magnetic steel body 21322a extending outward away from the main magnetic steel 21321, the protruding portion 21322b can increase the volume of the auxiliary magnetic steel 21322, thereby improving the magnetic field strength of the entire magnetic circuit system 213; the main body portion 2311 of the first mass 231 is provided with a groove 23111 avoiding the protruding portion 21322b, and the bottom of the groove 23111 extends outward toward the elastic member 22, the first mass 231 is thus designed to limit vibration and further protect the structure of the sound production unit 21.

[0064] As shown in Figure 6 , the magnetic circuit system 213 further includes an auxiliary pole core 2134 covering the side of the auxiliary magnetic steel 21322 close to the diaphragm 2121 and a main pole core 2135 covering the side of the main magnetic steel 21321 close to the diaphragm 2121, and the auxiliary pole core 2134 is integrally formed with the basket 211.

[0065] As shown in Figure 2 , Figure 6 , the upper cover 11 in the housing 1 includes a sound hole 111 penetrating through the upper cover 11 in the third direction and arranged opposite to the diaphragm 2121, and the sound production unit 21 further includes a sealing member 214 in the form of a ring, the upper cover 11 in the housing 1 further includes an inner edge 112 surrounding the sound hole 111, and the sealing member 214 is clamped between the basket 211 and the inner edge 112, the sealing member 214 is used for sealing and can prevent dust or water from entering the multifunctional sound production device, and in addition, the diaphragm 2121 can be aligned with the sound hole 111 during the sound production process of the multifunctional sound production device 100, thereby preventing the occurrence of sound leakage.

[0066] As shown in Figures 6-7 The diaphragm 2121 includes a spherical top portion 21211, a folded ring portion 21212 surrounding the spherical top portion 21211, and an outer fixed portion 21213 extending from the outer circumferential side of the folded ring portion 21212 and fixed to the yoke 211. The sound emitting unit 21 further includes a support 215 between the outer fixed portion 21213 and the sealing member 214. The support 215 includes a first supporting portion 2151 abutting the outer fixed portion 21213, an extension portion 2152 extending from the outer edge of the first supporting portion 2151 towards the magnetic circuit system 213, and a second supporting portion 2153 extending from the extension portion 2152 away from the yoke 211. The first supporting portion 2151, the extension portion 2152, and the second supporting portion 2153 are all fixed to the sealing member 214. In this way, the combination of the sealing member 214 and the support 215 is more stable, and the stability of the waterproof and dustproof performance of the multifunctional sound emitting device is improved.

[0067] In the above structure, the mass 23 is arranged on the side of the lower clamping plate 2131 close to the vibration system 212, and the mass 23 abuts the first wall portion 21312. This can increase the strength of the bending portion of the lower clamping plate 2131, and reduce the drop deformation of the lower clamping plate 2131. The arrangement of the mass 23 can also make it easier to adjust the resonance frequency F0 and the vibration amount G value in the multifunctional sound emitting device 100, so that the multifunctional sound emitting device has excellent vibration performance, reduces the mutual interference between sound emission and vibration, and improves the stability of the entire multifunctional sound emitting device.

[0068] The above is only an embodiment of the present application, and it should be noted that those skilled in the art can make improvements without departing from the inventive concept, and these improvements are within the scope of protection of the present application.

Claims

1. A multifunctional sound-generating device, comprising a housing, a vibrating unit housed within the housing, and a driving assembly for driving the vibrating unit to vibrate along a first direction; The vibration unit includes a sound-generating unit and an elastic member that elastically supports the sound-generating unit on the outer shell; the sound-generating unit includes a frame, a vibration system fixed to the frame, and a magnetic circuit system that drives the vibration system to vibrate and generate sound; the magnetic circuit system includes a lower clamping plate and a magnet assembly fixed to the lower clamping plate near the vibration system. The lower clamping plate includes a flat plate portion that supports the magnet assembly and a first wall portion that bends and extends from the flat plate portion toward the vibrating system. One end of the elastic member is fixed to the first wall portion and the other end is fixed to the outer shell. Its features are, The vibration unit also includes a mass block disposed on the side of the lower clamping plate near the vibration system, and the mass block abuts against the first wall portion; The mass block includes a first mass block fixed to the side of the lower clamping plate near 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 abuts against and is fixed to the first wall.

2. The multifunctional sound-generating device according to claim 1, characterized in that: The mass block is made of 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 also includes a second mass block stacked on the side of the first mass block near the vibration system and abutting against the first extension wall.

4. The multifunctional sound-generating device according to claim 3, characterized in that: The elastic element includes a fixing part fixed to the first wall portion, a connecting part fixed to the outer shell, and an elastic arm connecting the fixing part and the connecting part. The lower clamping plate also includes a second wall portion that bends and extends from the flat plate portion toward the vibration system and is spaced apart from the connecting part. The first mass block includes a second extension wall that extends from the main body portion and is correspondingly provided with the second wall portion. The second extension wall abuts and is fixed to the second wall portion. The second mass block is located between the first extension wall and the second extension wall, and both ends of the second mass block abut against the first wall portion and the second wall portion, respectively.

5. The multifunctional sound-generating device according to claim 3, characterized in that: The number of elastic elements is two, and the two elastic elements are arranged on opposite sides of the sound-generating unit along the first direction. The number of second mass blocks is two, and the two second mass blocks are arranged on opposite sides of the magnet assembly along a second direction perpendicular to the first direction.

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

7. The multifunctional sound-generating device according to claim 6, characterized in that: The main magnet is ring-shaped. The driving assembly includes two sets of driving magnet assemblies fixed to the inner circumference of the main magnet and a driving coil fixed inside the housing. The driving coil is spaced between the two sets of driving magnet assemblies. The two sets of driving magnet assemblies are arranged on opposite sides of the main magnet along a direction perpendicular to the first direction. Each set of driving magnet assemblies includes three driving magnets arranged side by side along the first direction. The three driving magnets in one set of driving magnet assemblies correspond one-to-one with the three driving magnets in the other set of driving magnet assemblies. The magnetization direction of the main magnet is parallel to the third direction; the magnetization direction of all the driving magnets is perpendicular to the magnetization direction of the main magnet, wherein the magnetization direction of the middle driving magnet in one group of driving magnet assemblies is opposite to the magnetization direction of the middle driving magnet in another group of driving magnet assemblies, and the magnetization direction of the middle driving magnet in any group of driving magnet assemblies is the same as the magnetization direction of the driving magnets on both sides in another group of driving magnet assemblies.

8. The multifunctional sound-generating device according to claim 6, characterized in that: The housing includes a sound outlet hole that extends through it along the third direction and is disposed opposite to the diaphragm. The sound-generating unit also includes an annular seal. The housing also includes an inner edge surrounding the sound outlet hole. The seal is sandwiched between the frame and the inner edge.

9. The multifunctional sound-generating device according to claim 8, characterized in that: The diaphragm includes a spherical top, a folded ring portion surrounding the spherical top, and an outer fixing portion extending from the outer periphery of the folded ring portion and fixed to the frame. The sound-generating unit also includes a support member located between the outer fixing portion and the seal. The support member includes a first support portion that fits against the outer fixing portion, an extension portion that bends and extends from the outer edge of the first support portion toward the direction close to the magnetic circuit system, and a second support portion that bends and extends from the extension portion toward the direction away from the frame. The first support portion, the extension portion, and the second support portion are all fixed to the seal.

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