Multifunctional sound device

Abstract

An embodiment of the present invention provides a multifunctional sound-generating device, which includes a shell, a sound-generating unit, and a motor assembly provided with a coil unit, wherein the sound-generating unit includes a basin, a vibration system, and a magnetic circuit system with a magnetic gap, wherein the vibration system vibrates and generates sound along a first direction under the drive of the magnetic circuit system, wherein the magnetic circuit system is elastically connected to the shell through an elastic arm, and wherein a through hole is provided at the center of the magnetic circuit system; wherein the motor assembly is accommodated in the through hole, wherein the motor assembly includes a coil unit, and wherein the coil unit is fixed to the shell; wherein the coil unit is spaced apart from the magnetic circuit system and drives the magnetic circuit system to vibrate along a second direction; wherein the first direction and the second direction are perpendicular to each other. Compared with the related art, the multifunctional sound-generating device of the present invention has a small overall thickness and a small volume, a strong driving force of the motor assembly and a small influence on the driving force of the magnetic circuit system, and excellent acoustic performance and vibration performance.

Description

[Technical field]

[0001] The invention relates to the field of electroacoustic conversion, and in particular to a multifunctional sound-generating device used in electronic speaker products. [Background technology]

[0002] With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among the many mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. At present, mobile phones have extremely diverse functions, including high-quality music functions and vibration functions. Therefore, multifunctional sound devices with vibration functions and sound playback are widely used in current smart mobile devices.

[0003] The multifunctional sound-generating device of the related technology includes a shell and a sound-generating unit and a motor assembly accommodated in the shell, the sound-generating unit includes a basin frame and a vibration system and a magnetic circuit system with a magnetic gap respectively fixed to the basin frame; the motor assembly is attached to a side of the magnetic circuit system away from the vibration system.

[0004] However, the sound unit and the motor assembly in the multifunctional sound device in the related art can be controlled independently, but because the motor assembly is stacked under the sound unit, the thickness of the multifunctional sound device increases, and it is difficult to achieve the thinness of the multifunctional sound device. In addition, the respective magnetic steels of the sound unit and the motor assembly are not on the same plane, and the operation of their respective magnetic field driving forces interferes and affects each other, resulting in a large number of magnetic steels in the multifunctional sound device, resulting in a large volume and unable to be miniaturized, thereby making the acoustic performance and vibration performance of the multifunctional sound device poor.

[0005] Therefore, it is necessary to provide a new multifunctional sound-generating device to solve the above-mentioned technical problems. [Summary of the invention]

[0006] The object of the present invention is to provide a multifunctional sound-generating device with small overall thickness and volume, strong driving force of the motor component and small influence on the driving force of the magnetic circuit system, excellent acoustic performance and excellent vibration performance.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a multifunctional sound-generating device, which includes a shell having a receiving space and a sound-generating unit fixedly received in the receiving space, the sound-generating unit includes a basin frame and a vibration system and a magnetic circuit system having a magnetic gap respectively fixed to the basin frame, the vibration system vibrates along a first direction and generates sound under the drive of the magnetic circuit system, the magnetic circuit system is elastically connected to the shell through an elastic arm, and a through hole is provided at the center position of the magnetic circuit system; the multifunctional sound-generating device also includes a motor assembly received in the through hole, the motor assembly includes a coil unit, and the coil unit is fixed to the shell; the coil unit is spaced from the magnetic circuit system and drives the magnetic circuit system to vibrate along a second direction; wherein, the first direction and the second direction are perpendicular to each other.

[0008] Preferably, the magnetic circuit system includes a yoke fixed to the basin frame, a main magnetic steel fixed to the yoke, two auxiliary magnetic steels respectively located on opposite sides of the main magnetic steel and spaced from the main magnetic steel to form the magnetic gap, a first annular soft magnetic steel and a second annular soft magnetic steel; a yoke center hole is provided at the center position of the yoke passing through it; the main magnetic steel is annular and forms a guide space, the main magnetic steel is fixed to the yoke and arranged around the yoke center hole, the guide space is connected with the yoke center hole and together form the through hole; the auxiliary magnetic steels are located on the other opposite sides of the yoke; the first soft magnetic steel is stacked and fixed on the side of the main magnetic steel away from the yoke, and the second soft magnetic steel is stacked and fixed on the side of the auxiliary magnetic steel away from the yoke.

[0009] Preferably, the yoke also includes a yoke body and two elastic arms extending from opposite sides of the yoke body, wherein the yoke center hole is located in the yoke body, and the main magnetic steel and the auxiliary magnetic steel are both fixed to the yoke body; the elastic arms are elastically connected to the shell and suspend the yoke body in the accommodation space.

[0010] Preferably, the magnetic circuit system also includes two auxiliary magnetic steels fixed on opposite sides of the magnetic yoke, and the two auxiliary magnetic steels are respectively arranged at intervals on opposite sides of the main magnetic steel and correspond to the positions of the two elastic arms respectively; the second soft magnetic steel is also stacked and fixed on the side of the auxiliary magnetic steel away from the magnetic yoke.

[0011] Preferably, the motor assembly includes a motor magnet fixed to a side of the yoke body away from the housing, the motor magnet is accommodated in the guide space, and the main magnet is arranged around the motor magnet.

[0012] Preferably, the motor magnets are arranged to include two, the main magnet is rectangular, and the two motor magnets are respectively fixed on opposite sides of the short axis or long axis of the main magnet.

[0013] Preferably, the coil unit includes an iron core fixed to the shell and a coil wound around the iron core, the iron core is fixed to the shell and is at least partially accommodated in the guide space after passing through the center hole of the magnetic yoke; the coil is respectively spaced apart from the motor magnet and the main magnet and drives the motor magnet and the main magnet to vibrate along the second direction; the motor assembly also includes a mass block fixed to the magnetic circuit system, and the mass block is fixed to the magnetic yoke and / or the second soft magnetic steel.

[0014] Preferably, the vibration system includes a diaphragm fixed to the basin frame, a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate and produce sound, and a skeleton fixing the voice coil to the diaphragm; the voice coil is rectangular, and the length difference between the length of the long axis of the voice coil and the length of the long axis of the main magnet is greater than or equal to the maximum amplitude of the motor magnet.

[0015] Preferably, the vibration system further comprises an elastic member, one end of the elastic member is connected to the basin frame or the shell, and the other end of the elastic member is connected to the voice coil.

[0016] Preferably, the main magnetic steel is a ring-shaped structure with the same thickness.

[0017] Compared with the related art, the multifunctional sound-generating device of the present invention is provided with a through hole at the center position thereof. Since the magnetic lines of force in the middle area of ​​the magnetic circuit system are relatively few, the structure improves the utilization rate of the magnetic energy product of the magnetic circuit system after the through hole is provided in the middle area of ​​the magnetic circuit system, so that the acoustic performance of the multifunctional sound-generating device is excellent; the motor assembly is accommodated in the through hole, so that the overall thickness of the multifunctional sound-generating device is small, which is conducive to the lightweight application of the multifunctional sound-generating device; the coil unit of the motor assembly is fixed to the shell, and the coil unit is spaced apart from the magnetic circuit system and The magnetic circuit system is driven to vibrate along the second direction. The structure uses the magnetic steel of the magnetic circuit system as the magnetic steel for providing driving force for the motor assembly without adding additional magnetic steel, so that the magnetic steel of the magnetic circuit system can be reused, thereby enhancing the driving force of the motor assembly, thereby making the vibration performance of the multifunctional sound-emitting device good; more preferably, the first direction is perpendicular to the second direction, so that the coil unit of the motor assembly has less influence on the driving force of the magnetic circuit system of the sound-emitting unit in the first direction, and there is less mutual interference, so that the multifunctional sound-emitting device of the present invention achieves excellent acoustic performance and excellent vibration performance.

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. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the multifunctional sound-generating device of the present invention;

[0020] Figure 2 It is a partial three-dimensional structural exploded view of the multifunctional sound-generating device of the present invention;

[0021] Figure 3 A partially exploded view of the three-dimensional structure of the multifunctional sound-generating device of the present invention without part of the shell

[0022] Figure 4 For along Figure 3 The cross-section diagram of the AA line;

[0023] Figure 5 It is a schematic diagram of the three-dimensional assembly structure of the magnetic circuit system and the motor assembly of the multifunctional sound-generating device of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the magnetic yoke of the multifunctional sound-generating device of the present invention. [Specific implementation method]

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 this field without creative work are within the scope of protection of the present invention.

[0026] The present invention provides a multifunctional sound-generating device 100. Figure 1-6 The multifunctional sound-generating device 100 includes a shell 20 having the receiving space 200 and a sound-generating unit 10 and a motor assembly 4 fixedly received in the receiving space 200 .

[0027] The housing 20 includes an upper cover 201 and a lower cover 202 which is disposed on the upper cover 201 and which encloses the receiving space 200 together with the upper cover 201. Of course, the present invention is not limited thereto, and the housing 20 can also be integrally formed.

[0028] The sound-generating unit 10 includes a basin frame 1, a vibration system 2 and a magnetic circuit system 3 having a magnetic gap 30 respectively fixed to the basin frame 1. The vibration system 2 vibrates and generates sound along a first direction under the drive of the magnetic circuit system 3. In this embodiment, the first direction is the thickness direction of the sound-generating unit 10.

[0029] The vibration system 2 includes a diaphragm 21 fixed to the basin frame 1, a voice coil 22 inserted in the magnetic gap 30 to drive the diaphragm 21 to vibrate and produce sound, an elastic support component 23 connected to the side of the voice coil 22 away from the diaphragm 21, and a frame 24 that fixes the voice coil 22 to the diaphragm 21. The elastic support component 23 can be directly fixed to the voice coil 22 or fixed to the voice coil 22 by setting a frame. The setting of the elastic support component 23 can achieve a good effect of preventing the lateral swing of the voice coil 22 when vibrating, thereby making the multifunctional sound-generating device 100 have good stability.

[0030] In this embodiment, the frame 24 is made of metal material to realize the rigid connection between the dome of the diaphragm 21 and the voice coil 22 .

[0031] The magnetic circuit system 3 drives the vibration system 2 to vibrate and produce sound. A through hole 300 is provided at the center of the magnetic circuit system 3. The motor assembly 4 is accommodated in the through hole 300. Since there are fewer magnetic lines of force in the middle area of ​​the magnetic circuit system 3, the structure improves the utilization rate of the magnetic energy product of the magnetic circuit system 3 after the through hole 300 is provided in the middle area of ​​the magnetic circuit system 3, so that the acoustic performance of the multifunctional sound-generating device 100 is excellent.

[0032] The magnetic circuit system 3 includes a yoke 31 , a main magnetic steel 32 and an auxiliary magnetic steel 33 .

[0033] The magnetic yoke 31 is fixed to the basin frame 1 .

[0034] The yoke 31 includes a yoke body 311 , two elastic arms 312 extending from opposite sides of the yoke body 311 , and a yoke center hole 3110 penetrating therethrough.

[0035] The yoke body 311 is rectangular.

[0036] A yoke center hole 3110 is provided at the center of the yoke 31 ; the yoke center hole 3110 is located in the yoke body 311 .

[0037] The magnetic circuit system 3 is elastically connected to the housing 20 through the elastic arms 312. The two elastic arms 312 are respectively located on opposite sides of the short axis of the yoke body 311. The elastic arms 312 are fixed to the housing 20 and suspend the yoke body 311 in the receiving space 200. This structure increases the anti-swaying performance of the yoke 31, thereby improving the vibration performance of the multifunctional sound-generating device 100 of the present invention.

[0038] In this embodiment, the yoke center hole 3110 is located in the middle area of ​​the yoke body 311. The yoke center hole 3110 is in communication with the receiving space 200.

[0039] The main magnetic steel 32 is fixed to the magnetic yoke 31. The main magnetic steel 32 is annular and encloses a guide space 320. The main magnetic steel 32 is fixed to the magnetic yoke body 311 and is arranged around the magnetic yoke center hole 3110. The annular main magnetic steel 32 is conducive to increasing the space of the magnetic gap 30 of the magnetic circuit system 3 and improving the acoustic performance of the multifunctional sound-generating device 100. The guide space 320 is connected to the magnetic yoke center hole 3110 and together encloses the through hole 300. The guide space 320 is used to accommodate the motor assembly 4. This structure allows the motor assembly 4 to be installed in the guide space 320, so that the overall thickness of the multifunctional sound-generating device 100 is small, which is conducive to the lightweight application of the multifunctional sound-generating device 100.

[0040] In the present embodiment, the main magnetic steel 32 is a ring-shaped structure with the same thickness. That is to say, the cross-sectional area of ​​each position of the main magnetic steel 32 along its circumference is the same. Since there are fewer magnetic lines of force in the middle area of ​​the main magnetic steel 32, the acoustic performance of the sound-emitting unit 10 is not affected after the magnetic steel in the middle area of ​​the main magnetic steel 32 is removed. In the present embodiment, the main magnetic steel 32 is rectangular. The main magnetic steel 32 is surrounded by four magnetic steels. When the widths of the four magnetic steels tend to be equal, the utilization rate of the magnetic energy is higher, thereby improving the utilization rate of the magnetic energy product of the main magnetic steel 32, so that the acoustic performance of the multifunctional sound-emitting device 100 is excellent.

[0041] The auxiliary magnetic steels 33 include two, and the two auxiliary magnetic steels 33 are respectively located on opposite sides of the main magnetic steel 32 and are spaced from the main magnetic steel 32 to form the magnetic gap 30. In this embodiment, the main magnetic steel 32 is rectangular. The two auxiliary magnetic steels 33 are respectively located on opposite sides of the long axis of the main magnetic steel 32. Specifically, the auxiliary magnetic steels 33 are located on the other opposite sides of the yoke body 311.

[0042] The motor assembly 4 is accommodated in the guide space 320. Specifically, the motor assembly 4 includes a coil unit 41 and a motor magnet 42.

[0043] The coil unit 41 is fixed to the housing 20 . In this embodiment, the coil unit 41 is fixed to the lower cover 202 .

[0044] The coil unit 41 is spaced apart from the magnetic circuit system 3 and drives the magnetic circuit system 3 to vibrate along the second direction. The first direction and the second direction are perpendicular to each other. Since the first direction and the second direction are perpendicular to each other, the coil unit 41 of the motor assembly 4 has little effect on the driving force of the magnetic circuit system of the sound-generating monomer 10 in the first direction, and there is little mutual interference, so that the multifunctional sound-generating device 100 of the present invention achieves excellent acoustic performance and excellent vibration performance.

[0045] Specifically, the coil unit 41 includes an iron core 411 fixed to the housing 20 and a coil 412 wound around the iron core 411. The iron core 411 is fixed to the housing 20 and is at least partially contained in the guide space 320 after passing through the center hole 3110 of the magnetic yoke. The coil 412 is spaced apart from the motor magnet 42 and the main magnet 32 ​​respectively and drives the motor magnet 42 and the main magnet 32 ​​to vibrate along the second direction. This structure uses the magnet of the magnetic circuit system 3 as the magnet that provides driving force for the motor assembly 4 without adding additional magnets, so that the magnet of the magnetic circuit system 3 can be reused, thereby enhancing the driving force of the motor assembly 4, so that the vibration performance of the multifunctional sound-generating device 100 is good.

[0046] In this embodiment, the number of turns of the coil 412 exceeds 100 turns, and the iron core 411 and the coil 412 together constitute an electromagnet. When energized, the coil unit 41 generates a magnetic field driving force. Specifically, the coil unit 41 is spaced apart from the main magnetic steel 32 and drives the main magnetic steel 32 to reciprocate along a vibration direction perpendicular to the vibration system 2. This structure makes the vibration system 2 and the coil unit 41 drive the main magnetic steel 32 to vibrate in different directions, reducing mutual interference, so that the multifunctional sound-generating device 100 of the present invention achieves excellent acoustic performance and excellent vibration performance. Among them, the coil 412 and the voice coil 22 are independently controlled by different external signals, and the sound-generating unit 10 is loaded with a music signal or a voice signal. The motor assembly 4 is loaded with a vibration signal.

[0047] The motor magnet 42 is fixed to the motor magnet 42 on the side of the yoke body 311 away from the housing 20 . The motor magnet 42 is received in the guide space 320 , and the main magnet 32 ​​is disposed around the motor magnet 42 .

[0048] The motor magnet 42 and the coil unit 41 are both contained in the guide space 320. The vibration space formed by the coil unit 41 and the motor magnet 42 in the guide space 320 is used for the vibration of the motor assembly 4, that is, the vibration of the motor magnet 42. Moreover, the width of the vibration space is greater than or equal to the maximum amplitude of the motor magnet 42. Thus, the vibration reliability of the multifunctional sound-generating device 100 is high.

[0049] The motor magnet 42 is provided with two motor magnets 42, and the two motor magnets 42 are respectively fixed to the two opposite inner sides of the main magnet 32. This structure forms a magnet group that provides driving force to the motor assembly 4 with the motor magnet 42 and the part of the main magnet 32 ​​fixed to the motor magnet 42. The magnet group forms a magnetic circuit and a vibration unit. The weight of the vibration unit is also increased due to the superimposed weight of the motor magnet 42 and the main magnet 32, thereby enhancing the driving force of the motor assembly 4, so that the vibration performance of the multifunctional sound-generating device 100 is good. Compared with the multifunctional sound-generating device of the related art, the driving force of the motor assembly 4 of the multifunctional sound-generating device 100 of the present invention is increased by more than 80%. More preferably, since the motor magnet 42 and the main magnet 32 ​​are both located in the same plane, and the motor magnet 42 has less influence on the driving force of the magnetic circuit system 3 of the sound-generating monomer 10, and less mutual interference, the multifunctional sound-generating device 100 of the present invention achieves excellent acoustic performance and excellent vibration performance.

[0050] The two motor magnets 42 are respectively fixed on opposite sides of the short axis or long axis of the main magnet 32. In this embodiment, the two motor magnets 42 are respectively fixed on opposite sides of the short axis of the main magnet 32. This structure enables the coil unit 41 of the motor assembly 4 to drive the motor magnet 42 to vibrate along the direction of the long axis of the main magnet 32. The sound-generating monomer 10 vibrates along the thickness direction of the sound-generating monomer 10. The two vibration directions are different, which reduces mutual interference, so that the multifunctional sound-generating device 100 of the present invention achieves excellent acoustic performance and excellent vibration performance. In another embodiment, in order to better suspend the yoke body 311 in the receiving space 200, the motor magnet 42 is also provided with a spring connected to the shell 20. The spring is a V-shaped or C-shaped spring, and a spring structure is set in a part of the motor magnet 42 so that the anti-sway performance of the yoke 31 is increased, thereby improving the vibration performance of the multifunctional sound-generating device of the present invention.

[0051] In this embodiment, the voice coil 22 is rectangular. That is, the voice coil 22 is an elongated voice coil. The difference between the length of the long axis of the voice coil 22 and the length of the long axis of the main magnetic steel 32 is greater than or equal to the maximum amplitude of the motor magnetic steel 42. That is, the length of the long axis of the voice coil 22 is greater than or equal to the sum of the length of the long axis of the main magnetic steel 32 and twice the amplitude of the vibration of the motor magnetic steel 42. Since the inner side of the voice coil 22 surrounds the main magnetic steel 32 and is spaced, that is, the voice coil is located in the magnetic gap 30 and the inner side is the main magnetic steel 32, the length of the long axis of the voice coil 22 is set to be elongated, which is conducive to ensuring that when the main magnetic steel 32 vibrates along the direction of the long axis of the main magnetic steel 32 under the drive of the coil unit 41, the main magnetic steel 32 does not affect the vibration of the voice coil 22 in the direction along the thickness of the sound-emitting monomer 10 within the maximum amplitude range of the motor magnetic steel 42, so that the multifunctional sound-emitting device 100 of the present invention achieves excellent acoustic performance and excellent vibration performance.

[0052] In this embodiment, the magnetic circuit system 3 further includes two auxiliary magnetic steels 34 fixed on opposite sides of the magnetic yoke 31. The two auxiliary magnetic steels 34 are respectively arranged at intervals on opposite sides of the main magnetic steel 32, and correspond to the positions of the two elastic arms 312. Specifically, the two auxiliary magnetic steels 34 are respectively arranged at intervals on opposite sides of the short axis of the main magnetic steel 32. Since the magnetic steel group formed by the main magnetic steel 32 and the motor magnetic steel 42 vibrates repeatedly in the direction along the long axis of the main magnetic steel 32, the magnetic field driving force on the opposite sides of the short axis of the main magnetic steel 32 is unbalanced and asymmetric, which affects the pure sound of the multifunctional sound-generating device 100. Therefore, two auxiliary magnetic steels 34 are arranged on opposite sides of the short axis of the main magnetic steel 32. This structure can improve the magnetic field driving force on the opposite sides of the short axis of the main magnetic steel 32, so that the multifunctional sound-generating device 100 of the present invention can achieve excellent acoustic performance. On the other hand, it can also increase the anti-sway performance of the motor assembly 4, thereby improving the vibration performance of the multifunctional sound-generating device 100 of the present invention.

[0053] In this embodiment, the magnetic circuit system 3 further includes a first annular soft magnetic steel 35 and a second annular soft magnetic steel 36. The first soft magnetic steel 35 is stacked and fixed on the side of the main magnetic steel 32 away from the yoke 31. The second soft magnetic steel 36 is stacked and fixed on the side of the secondary magnetic steel away from the yoke and the side of the auxiliary magnetic steel 34 away from the yoke 31.

[0054] In this embodiment, the motor assembly 4 further includes a mass block (not shown) fixed to the magnetic circuit system 3. The mass block is used for counterweighting, increasing the weight of the vibration unit formed by the motor magnetic steel 42 and the main magnetic steel 32, so as to increase the vibration amplitude of the vibration unit, so that the motor assembly 4 outputs a higher acceleration, thereby improving the vibration performance of the multifunctional sound-generating device 100 of the present invention.

[0055] The mass block is fixed to the yoke 31 and / or the second soft magnetic steel 36. In this embodiment, the mass block is fixed to the yoke 31. The mass block includes two, and the two mass blocks are respectively located on opposite sides of the short axis of the main magnetic steel 32.

[0056] In this embodiment, in order to improve the vibration stability of the multifunctional sound-generating device 100 of the present invention, the vibration system 2 is provided with an elastic member 231. Specifically, the elastic support assembly 23 includes an elastic member 231. One end of the elastic member 231 is connected to the basin frame 1 or the shell 20. The other end of the elastic member 231 is connected to the voice coil 22. The setting of the elastic member 231 can achieve a good effect of preventing the lateral swing of the voice coil 22 during vibration, and increase the vibration performance of the voice coil 22, so that the multifunctional sound-generating device 100 has good stability. Among them, the elastic member 231 is a flexible circuit board, which is used to supply power to the voice coil 22 and prevent the lead of the voice coil 22 from being disconnected, so that the multifunctional sound-generating device 100 has good stability.

[0057] In this embodiment, the elastic members 231 include two elastic members 231 , which are respectively located on two opposite sides of the short axis of the magnetic circuit system 3 .

[0058] More preferably, when the coil unit 41 drives the main magnet 32 ​​to reciprocate along a vibration direction perpendicular to the vibration system 2, the elastic member 231 simultaneously increases the anti-sway performance of the yoke 31, thereby improving the vibration performance of the multifunctional sound-generating device 100 of the present invention.

[0059] Compared with the related art, the multifunctional sound-generating device of the present invention is provided with a through hole at the center position thereof. Since the magnetic lines of force in the middle area of ​​the magnetic circuit system are relatively few, the structure improves the utilization rate of the magnetic energy product of the magnetic circuit system after the through hole is provided in the middle area of ​​the magnetic circuit system, so that the acoustic performance of the multifunctional sound-generating device is excellent; the motor assembly is accommodated in the through hole, so that the overall thickness of the multifunctional sound-generating device is small, which is conducive to the lightweight application of the multifunctional sound-generating device; the coil unit of the motor assembly is fixed to the shell, and the coil unit is spaced apart from the magnetic circuit system and The magnetic circuit system is driven to vibrate along the second direction. The structure uses the magnetic steel of the magnetic circuit system as the magnetic steel for providing driving force for the motor assembly without adding additional magnetic steel, so that the magnetic steel of the magnetic circuit system can be reused, thereby enhancing the driving force of the motor assembly, thereby making the vibration performance of the multifunctional sound-emitting device good; more preferably, the first direction is perpendicular to the second direction, so that the coil unit of the motor assembly has less influence on the driving force of the magnetic circuit system of the sound-emitting unit in the first direction, and there is less mutual interference, so that the multifunctional sound-emitting device of the present invention achieves excellent acoustic performance and excellent vibration performance.

[0060] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A multifunctional sound-generating device, comprising a shell having a receiving space and a sound-generating unit fixedly received in the receiving space, wherein the sound-generating unit comprises a basin frame, a vibration system respectively fixed to the basin frame, and a magnetic circuit system having a magnetic gap, wherein the vibration system vibrates along a first direction to generate sound under the drive of the magnetic circuit system, characterized in that: The magnetic circuit system is elastically connected to the housing through an elastic arm, and a through hole is provided at the center of the magnetic circuit system; The multifunctional sound-generating device further comprises a motor assembly received in the through hole, wherein the motor assembly comprises a coil unit, and the coil unit is fixed to the housing; the coil unit is spaced apart from the magnetic circuit system and drives the magnetic circuit system to vibrate along a second direction; wherein the first direction and the second direction are perpendicular to each other; The magnetic circuit system includes a magnetic yoke fixed to the basin frame, a main magnetic steel fixed to the magnetic yoke, and two auxiliary magnetic steels respectively located on opposite sides of the main magnetic steel and spaced apart from the main magnetic steel to form the magnetic gap; A yoke center hole is provided at the center of the yoke. The main magnetic steel is annular and encloses a guide space, the main magnetic steel is fixed to the magnetic yoke and arranged around the central hole of the magnetic yoke, and the guide space is connected with the central hole of the magnetic yoke and together encloses the through hole; The auxiliary magnetic steels are located on the other two opposite sides of the magnetic yoke.

2. The multifunctional sound-generating device according to claim 1, characterized in that: The magnetic circuit system also includes a first soft magnetic steel in an annular shape and a second soft magnetic steel in an annular shape; The first soft magnetic steel is stacked and fixed on a side of the main magnetic steel away from the magnetic yoke, and the second soft magnetic steel is stacked and fixed on a side of the auxiliary magnetic steel away from the magnetic yoke.

3. The multifunctional sound-generating device according to claim 2, characterized in that: The yoke also includes a yoke body and two elastic arms extending from opposite sides of the yoke body respectively, the yoke center hole is located in the yoke body, the main magnetic steel and the auxiliary magnetic steel are both fixed to the yoke body; the elastic arms are elastically connected to the shell and suspend the yoke body in the receiving space.

4. The multifunctional sound-generating device according to claim 3, characterized in that: The magnetic circuit system also includes two auxiliary magnetic steels fixed on opposite sides of the magnetic yoke, and the two auxiliary magnetic steels are respectively arranged at opposite sides of the main magnetic steel and correspond to the positions of the two elastic arms respectively; the second soft magnetic steel is also stacked and fixed on the side of the auxiliary magnetic steel away from the magnetic yoke.

5. The multifunctional sound-generating device according to claim 3, characterized in that: The motor assembly includes a motor magnet fixed to a side of the yoke body away from the housing. The motor magnet is accommodated in the guide space, and the main magnet is arranged around the motor magnet.

6. The multifunctional sound-generating device according to claim 5, characterized in that: The motor magnets are provided in two pieces, the main magnet is rectangular, and the two motor magnets are respectively fixed on opposite sides of the short axis or long axis of the main magnet.

7. The multifunctional sound-generating device according to claim 6, characterized in that: The coil unit includes an iron core fixed to the shell and a coil wound around the iron core, wherein the iron core is fixed to the shell and is at least partially accommodated in the guide space after passing through the center hole of the magnetic yoke; the coil is respectively spaced apart from the motor magnet and the main magnet and drives the motor magnet and the main magnet to vibrate along the second direction; the motor assembly also includes a mass block fixed to the magnetic circuit system, and the mass block is fixed to the magnetic yoke and / or the second soft magnetic steel.

8. The multifunctional sound-generating device according to claim 5, characterized in that: The vibration system includes a diaphragm fixed to the basin frame, a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate and produce sound, and a frame that fixes the voice coil to the diaphragm; the voice coil is rectangular, and the length of the long axis of the voice coil is greater than or equal to the sum of the length of the long axis of the main magnet and twice the amplitude of the vibration of the motor magnet.

9. The multifunctional sound-generating device according to claim 8, characterized in that: The vibration system further comprises an elastic member, one end of which is connected to the basin frame or the shell, and the other end of which is connected to the voice coil.

10. The multifunctional sound-generating device according to claim 1, characterized in that: The main magnetic steel is a ring-shaped structure with the same thickness.

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