Multifunctional sound production device

Abstract

The application discloses a multifunctional sound production device, comprising: a shell, a receiving cavity is arranged in the shell; a sound production unit is arranged in the receiving cavity, the sound production unit comprises a sound film system and a magnetic circuit system for driving the sound film system to vibrate and produce sound in a first direction, the magnetic circuit system comprises a main magnetic steel and a plurality of auxiliary magnetic steel groups arranged around the main magnetic steel to form a magnetic gap, each auxiliary magnetic steel group is provided with a plurality of auxiliary magnetic steels distributed in a second direction, and the polarities of adjacent auxiliary magnetic steels are opposite; and at least one driving coil group is arranged in the receiving cavity, the driving coil group is provided with a plurality of driving coils, each driving coil group is arranged corresponding to an auxiliary magnetic steel group, and the orthographic projection of the driving coil group in the first direction is located at the main magnetic steel. Compared with the prior art, the driving coil group is arranged corresponding to the auxiliary magnetic steel group only, so that the height of the sound production device can be adjusted by adjusting the thickness of the auxiliary magnetic steel only, the thickness of the main magnetic steel does not need to be adjusted, and the influence on the acoustic performance of the sound production device is small.

Description

Technical Field

[0001] This invention relates to the field of electronic equipment technology, and in particular to a multifunctional sound-generating device. Background Technology

[0002] With the development of electronic technology, portable consumer electronic devices are becoming increasingly popular, such as mobile phones, handheld game consoles, navigation devices, or handheld multimedia entertainment devices. These electronic devices generally provide system feedback through voice and / or vibration, such as incoming call notifications on mobile phones, navigation prompts, and vibration feedback on game consoles.

[0003] In existing systems, devices that provide feedback include a sound-generating unit and a drive coil. The sound-generating unit contains a main magnet and a secondary magnet, and the drive coil spans the main magnet and the secondary magnet, sharing the side magnet and the center magnet of the sound-generating unit. If the height of the drive coil needs to be adjusted, the heights of both the main magnet and the secondary magnet need to be adjusted, which has a significant impact on acoustic performance. Summary of the Invention

[0004] The purpose of this invention is to provide a multifunctional sound-generating device to solve the technical problems in the prior art.

[0005] This invention provides a multifunctional sound-generating device, comprising:

[0006] A housing, wherein a receiving cavity is provided within the housing;

[0007] A sound-generating unit is disposed within the receiving cavity. The sound-generating unit includes a diaphragm system and a magnetic circuit system that drives the diaphragm system to vibrate and generate sound along a first direction. The magnetic circuit system includes a main magnet and a group of auxiliary magnets arranged around the main magnet to form a magnetic gap. The group of auxiliary magnets contains a plurality of auxiliary magnets distributed along a second direction, which is perpendicular to the first direction, and adjacent auxiliary magnets have opposite polarities.

[0008] At least one drive coil group is disposed within the receiving cavity. The drive coil group contains a plurality of drive coils. Each drive coil group is disposed corresponding to one of the auxiliary magnet groups. The orthographic projection of the drive coil group in the first direction is offset from the main magnet.

[0009] In the multifunctional sound-generating device described above, preferably, in the second direction, a driving coil is disposed between each of two adjacent auxiliary magnets. The driving coil includes a first coil portion and a second coil portion. The orthographic projection of the first coil portion in the first direction falls on one of the auxiliary magnets, and the orthographic projection of the second coil portion in the first direction falls on the other adjacent auxiliary magnet.

[0010] In the multifunctional sound-generating device described above, preferably, the first coil portion and the second coil portion enclose each other to form a wire-passing hole, and the wire-passing hole is provided at the junction of two adjacent auxiliary magnets.

[0011] In the multifunctional sound-generating device described above, preferably, the auxiliary magnet group has three auxiliary magnets, the drive coil group has two drive coils, and each drive coil is arranged corresponding to two adjacent auxiliary magnets.

[0012] In the multifunctional sound-generating device described above, preferably, both the auxiliary magnet group and the driving coil group are provided in two sets, and the two sets of auxiliary magnet groups and the two sets of driving coil groups are symmetrically arranged on opposite sides of the main magnet along a third direction, wherein the plane formed by the third direction and the second direction is perpendicular to the first direction.

[0013] In the multifunctional sound-generating device described above, preferably, the magnetic circuit system further includes a main pole core and a secondary pole core. The main pole core is stacked on the main magnet, and the secondary pole core includes a first secondary pole core portion and a second secondary pole core portion. The first secondary pole core portion is stacked on one of the secondary magnet groups, and the second secondary pole core portion is stacked on another of the secondary magnet groups. The first secondary pole core portion and the second secondary pole core portion enclose each other to form a first through hole, which is provided corresponding to the main magnet.

[0014] In the multifunctional sound-generating device described above, preferably, the magnetic circuit system further includes an upper magnet, which is stacked on the side of the main pole core opposite to the main magnet.

[0015] In the multifunctional sound-generating device described above, preferably, the receiving cavity is provided with an elastic connector and a vibrating block, the drive coil assembly is disposed on the vibrating block, and the elastic connector is connected between the housing and the vibrating block.

[0016] In the multifunctional sound-generating device described above, preferably, a second through hole is formed on the vibrating block, the orthographic projection of the main magnet in the first direction falls completely within the second through hole, and the orthographic projections of the drive coil group and the auxiliary magnet group in the first direction partially fall within the second through hole.

[0017] In the multifunctional sound-generating device described above, preferably, the magnetic circuit system further includes a magnetic yoke, the main magnet is arranged corresponding to the magnetic yoke, and the orthographic projection of the auxiliary magnet group in the first direction is offset from the magnetic yoke.

[0018] Compared with the prior art, the present invention sets the drive coil group to correspond only to the auxiliary magnet group, so that only the thickness of the auxiliary magnet needs to be adjusted, without adjusting the thickness of the main magnet at the same time, so that the height of the sound-generating device can be adjusted, and the impact on the acoustic performance of the sound-generating device is small. Attached Figure Description

[0019] Figure 1 This is an isometric view of the overall structure of the embodiment provided by the present invention;

[0020] Figure 2 This is a top view of the overall structure of the embodiment provided by the present invention;

[0021] Figure 3 yes Figure 2 Sectional view along axis AA;

[0022] Figure 4 yes Figure 2 BB-direction sectional view;

[0023] Figure 5 This is an exploded view of the overall structure of the embodiment provided by the present invention;

[0024] Figure 6 This is an exploded schematic diagram of the diaphragm system provided in the embodiment of the present invention;

[0025] Figure 7 This is an exploded schematic diagram of the magnetic circuit system provided in the embodiment of the present invention;

[0026] Figure 8 This is an exploded schematic diagram of the vibration system provided in the embodiment of the present invention;

[0027] Figure 9 This is an isometric view of the concealed cover plate state of the embodiment provided by the present invention;

[0028] Figure 10 This is a bottom view of the embodiment provided by the present invention in its hidden housing state;

[0029] Figure 11 This is a schematic diagram of the cooperation state between the auxiliary magnet assembly and the drive coil assembly in an embodiment provided by the present invention;

[0030] Figure 12 This is an isometric view of the sound-emitting block provided in the embodiment of the present invention;

[0031] Figure 13 This is an isometric view of the diaphragm according to an embodiment of the present invention;

[0032] Figure 14 This is an isometric view of the basin stand provided in the embodiment of the present invention;

[0033] Figure 15This is an isometric view of the skeleton provided in the embodiment of the present invention;

[0034] Figure 16 This is an isometric view of the secondary electrode core provided in the embodiment of the present invention;

[0035] Figure 17 This is an isometric view of the vibration block provided in the embodiment of the present invention;

[0036] Figure 18 This is an isometric view of the elastic connector provided in the embodiment of the present invention;

[0037] Figure 19 This is an isometric view of the support sheet provided in the embodiment of the present invention;

[0038] Explanation of reference numerals in the attached figures:

[0039] 10-Shell, 11-Receiving cavity, 111-Front cavity, 112-Rear cavity, 12-Main shell, 121-Sound outlet, 13-Secondary shell, 14-Cover plate;

[0040] 20-Diaphragm system, 21-Diaphragm, 211-Vibrating diaphragm, 2111-First surround section, 2112-First outer flange, 2113-First inner flange, 212-Dome, 22-Voice coil, 23-Sound output block, 231-Sound output channel, 232-Sealing ring, 233-Sealing sheet, 24-Frame, 25-Skeleton, 251-Skeleton main body, 252-Skeleton bending section, 253-Third through hole, 254-Skeleton mounting section, 26-Second flexible circuit board;

[0041] 30-Magnetic circuit system, 31-Main magnet, 32-Secondary magnet, 33-Magnetic gap, 34-Main pole core, 35-Secondary pole core, 351-First secondary pole core, 352-Secondary pole core, 353-First through hole, 36-Upper magnet, 37-Magnetic yoke, 38-Elastic support;

[0042] 40-Vibration system, 41-Drive coil, 411-First coil part, 412-Second coil part, 413-Wire hole, 42-Elastic connector, 421-Planar support part, 422-Vertical connection part, 43-Vibration block, 431-Vibration block main body part, 432-Vibration block bending part, 433-Second through hole, 44-Support plate, 441-Support rib, 45-First flexible circuit board;

[0043] 50 - Main circuit board;

[0044] D1 - First direction;

[0045] D2 - Second direction;

[0046] D3-Third direction. Detailed Implementation

[0047] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0048] Reference Figures 1 to 19 As shown, an embodiment of the present invention provides a multifunctional sound-generating device that can be used in electronic devices to provide feedback prompts through sound or vibration.

[0049] To facilitate the explanation of the structure of the multifunctional sound-generating device, a reference coordinate system is introduced, referring to... Figure 5 As shown, the first direction D1, the second direction D2, and the third direction D3 are perpendicular to each other, and the first direction D1 is perpendicular to the plane formed by the second direction D2 and the third direction D3.

[0050] In the embodiments provided in this application, the multifunctional sound-generating device includes a housing 10 with a receiving cavity 11, a sound-generating unit housed in the receiving cavity 11, and a vibration system 40. The sound-generating unit can provide sound feedback, and the vibration system 40 can provide vibration feedback. Those skilled in the art will know that in other embodiments, the sound-generating unit can also simultaneously provide sound generation and vibration feedback.

[0051] Reference Figure 3 , Figure 4 as well as Figure 5 As shown, the sound-generating unit includes a diaphragm system 20 and a magnetic circuit system 30 that drives the diaphragm system 20 to vibrate along a first direction D1 to generate sound. The diaphragm system 20 divides the receiving cavity 11 into a front cavity 111 and a rear cavity 112. The housing 10 has a sound outlet that communicates with the front cavity 111 to generate sound. The rear cavity 112 can be filled with sound-absorbing powder to improve the low-frequency acoustic performance of the sound-generating device.

[0052] Reference Figure 3 , Figure 7 as well as Figure 11 As shown, the magnetic circuit system 30 includes a main magnet 31 and several auxiliary magnet groups arranged around the main magnet 31 to form a magnetic gap 33. Each auxiliary magnet group has multiple auxiliary magnets 32 distributed along the second direction D2. The number of auxiliary magnets 32 in each auxiliary magnet group is at least two. The polarities of adjacent auxiliary magnets 32 are opposite. For example, the polarity of one auxiliary magnet 32 ​​near the front cavity 111 is S pole, and the polarity of the adjacent auxiliary magnet 32 ​​near the front cavity 111 is N pole.

[0053] Reference Figure 3 , Figure 4 , Figure 8 as well as Figure 11As shown, the vibration system 40 includes several drive coil groups, each corresponding to a secondary magnet group. Each drive coil group contains at least one drive coil 41. In the first direction D1, the drive coil group is located on the side of the secondary magnet group away from the front cavity 111. There is a height difference between the drive coil group and the secondary magnet group. The orthographic projection of the drive coil group in the first direction D1 is offset from the main magnet 31, which facilitates the adjustment of the overall height of the sound-generating device. Only the thickness of the secondary magnet 32 ​​needs to be adjusted, without adjusting the thickness of the main magnet 31 at the same time, so as to adjust the height of the sound-generating device and have little impact on the acoustic performance of the sound-generating device.

[0054] In the embodiments provided in this application, the vibration system 40 acts as a mover, and the sound-generating unit with a main magnet 31 and a secondary magnet 32 ​​acts as a stator. The vibration system 40 is driven by the interaction force between the drive coil 41 and the secondary magnet 32, thereby achieving vibration feedback of the sound-generating device. This allows the sound-generating device to have both vibration feedback and voice feedback functions, and also reduces the increase in the thickness of the sound-generating device.

[0055] When the auxiliary magnet group has two auxiliary magnets 32, the drive coil group has one drive coil 41, which is located between two adjacent auxiliary magnets 32. When the auxiliary magnet group has more than two auxiliary magnets 32, the drive coil group has multiple drive coils 41, which are distributed sequentially at intervals along the second direction D2. One drive coil 41 is located between each two adjacent auxiliary magnets 32. The number of drive coils 41 is one less than the number of auxiliary magnets 32. In this embodiment, refer to... Figure 11 As shown, the drive coil 41 includes a first coil portion 411 and a second coil portion 412. The orthographic projection of the first coil portion 411 in the first direction D1 falls on one of the auxiliary magnets 32, and the orthographic projection of the second coil portion 412 in the first direction D1 falls on the adjacent auxiliary magnet 32. Thus, magnetic field lines pass through the drive coil 41, providing driving force to the drive coil 41. At the same time, the magnetic field lines are denser, which is beneficial to improving the performance of the sound-generating device.

[0056] In the embodiments of this application, reference is made to Figure 11As shown, the first coil portion 411 and the second coil portion 412 enclose each other to form a wire hole 413. The wire hole 413 is provided at the junction of two adjacent auxiliary magnets 32. In one feasible embodiment, the wire hole 413 is an oblong hole, and the long axis of the wire hole 413 extends along the third direction D3. The long axis of the wire hole 413 is located at the junction of two adjacent auxiliary magnets 32. Alternatively, when there is a gap between two adjacent auxiliary magnets 32, the long axis of the wire hole 413 is located at the center line of this gap. This makes the first coil portion 411 and the second coil portion 412 completely correspond to one auxiliary magnet 32, thereby increasing the relative force between the drive coil 41 and the auxiliary magnet 32 ​​and ensuring the drive of the sound-generating unit.

[0057] Continue to refer to Figure 11 As shown, the auxiliary magnet group has three auxiliary magnets 32. The polarity of the middle auxiliary magnet 32 ​​is opposite to that of the two adjacent auxiliary magnets 32. For example, the polarity of the middle auxiliary magnet 32 ​​facing the drive coil group is N, while the polarity of the two auxiliary magnets 32 on both sides facing the drive coil group is S. Correspondingly, the drive coil group has two drive coils 41. The two drive coils 41 have the same structure and are arranged at intervals along the second direction D2. Each drive coil 41 corresponds to two adjacent auxiliary magnets 32.

[0058] In the embodiments of this application, reference is made to Figure 3 , Figure 4 , Figure 7 as well as Figure 11 As shown, the main magnet 31 extends along the second direction D2. There are two sets of auxiliary magnets and two sets of drive coils. The two sets of auxiliary magnets and the two sets of drive coils are symmetrically arranged on opposite sides of the main magnet 31 along the third direction D3. An annular magnetic gap 33 is formed between the auxiliary magnets and the main magnets 31. The interaction force between the drive coil 41 and the auxiliary magnets 32 is balanced. At the same time, by increasing the number of drive coils 41 and auxiliary magnets 32 in a limited space, the relative area of ​​drive coils 41 and auxiliary magnets 32 can be increased, thereby increasing the interaction force between drive coils 41 and auxiliary magnets 32, and the vibration feedback effect is more obvious.

[0059] Reference Figure 3 , Figure 4 , Figure 7 as well as Figure 16As shown, the magnetic circuit system 30 also includes a main pole core 34 and a secondary pole core 35. The main pole core 34 is a block structure, stacked on the main magnet 31. The secondary pole core 35 is a ring structure, including a first secondary pole core portion 351 and a second secondary pole core portion 352. The first secondary pole core portion 351 is stacked on one of its secondary magnet groups, and the second secondary pole core portion 352 is stacked on another secondary magnet group. The first secondary pole core portion 351 and the second secondary pole core portion 352 enclose each other to form a first through hole 353. The first through hole 353 is provided corresponding to the main magnet 31, and the main magnet 31 is housed in the first through hole. The diameters of the first secondary pole core portion 351 and the second secondary pole core portion 352 are adapted to the diameters of the corresponding secondary magnet groups. The ring structure of the secondary pole core 35 can effectively improve the magnetic field uniformity in the diagonal region of the main magnet 31, and the overall electroacoustic performance of the sound-generating device can be effectively improved.

[0060] Reference Figure 3 as well as Figure 7 As shown, the magnetic circuit system 30 is also provided with an upper magnet 36, a magnetic yoke 37 and an elastic support 38. The upper magnet 36 is stacked on the side of the main pole core 34 away from the main magnet 31. The upper magnet 36 can not only fix and support the diaphragm 21, but also raise BL, thereby improving the performance of the sound-generating device.

[0061] The yoke 37 typically does not generate a magnetic field itself; it serves only as a soft magnetic material for magnetic field transmission in the magnetic circuit. The yoke 37 is usually made of soft iron, A3 steel, or soft magnetic alloys with high permeability. The yoke 37 can transmit the magnetic field generated by the drive coil 41 and the auxiliary magnet 35 to the desired location and form a magnetic field. Both the main magnet 31 and the yoke 37 are supported on the yoke 37. The orthographic projection of the main magnet 31 in the first direction D1 falls entirely on the yoke 37, while the orthographic projection of the auxiliary magnet assembly in the first direction D1 is offset from that of the yoke 37. Two elastic supports 38 are provided, symmetrically arranged on opposite sides of the main magnet 31 along the third direction D3. The auxiliary pole core 35 is supported on the elastic supports 38.

[0062] Reference Figure 8 As shown, the vibration system 40 also includes an elastic connector 42 and a vibrating block 43. A drive coil assembly is mounted on the vibrating block 43. The elastic connector 42 connects the housing 10 and the vibrating block 43. The vibrating block 43 is suspended within the receiving cavity 11 via the elastic connector 42. Under the action of the drive coil assembly, the vibrating block 43 can vibrate along the second direction D2 to provide vibration feedback. That is, the entire drive coil 41 and the vibrating block 43 are treated as a mover, and the sound-generating unit with the main magnet 31 and the auxiliary magnet 32 ​​is treated as a stator. The interaction force between the drive coil 41 and the auxiliary magnet 32 ​​causes the drive coil 41 to drive the vibrating block 43 to vibrate, thereby achieving vibration feedback from the sound-generating device. This allows the device to have both vibration feedback and voice feedback functions, and also reduces the increase in the thickness of the sound-generating device.

[0063] Reference Figure 3 , Figure 4 , Figure 8 as well as Figure 17 As shown, the vibrating block 43 includes a vibrating block main body 431 and a vibrating block bending portion 432 that bends from the outer edge of the vibrating block main body 431. A second through hole 433 is formed on the vibrating block main body 431. The orthographic projection of the main magnet 31 in the first direction D1 falls completely in the second through hole 433. The orthographic projections of the drive coil group and the auxiliary magnet group in the first direction D1 partially fall in the second through hole 433.

[0064] Reference Figure 3 , Figure 4 , Figure 10 as well as Figure 19 As shown, the vibration system 40 also includes a support plate 44 with several support ribs 441. There are gaps between adjacent support ribs 441. The bottom of the support plate 44 is supported on the bottom surface of the receiving cavity 11, and the top of the support plate 44 is in contact with the bottom of the vibrating block body 431, partially obscuring the second through hole 433. The bottom of the magnetic yoke 37 is supported on the support ribs 441. In the first direction D1, there is an overlap between the magnetic yoke 37 and the vibrating block body 431, which helps to reduce the overall height of the sound-generating device.

[0065] In one feasible embodiment, the main body 431 of the vibrating block is provided with several grooves, the drive coil 41 is at least partially embedded in the grooves, and the other part is located on one side of the second through hole 433. The drive coil 41 and the main body 431 of the vibrating block have an overlapping part, which is beneficial to reduce the overall height of the sound-generating device.

[0066] Reference Figure 8 as well as Figure 9 As shown, the vibration system 40 is also provided with a first flexible circuit board 45. One end of the first flexible circuit board 45 is connected to the drive coil 41. The main body of the first flexible circuit board 45 is attached to the surface of the vibration plate. A wave segment is also provided on the main body of the first flexible circuit board 45 to resist the force brought by the vibration. The other end of the first flexible circuit board 45 is connected to the main circuit board 50.

[0067] Reference Figure 18As shown, the elastic connector 42 includes a planar support portion 421 and a vertical connection portion 422. The vertical connection portion 422 extends along the first direction D1. The extension direction of the planar support portion 421 is perpendicular to the extension direction of the vertical connection portion 422. The main body portion 431 of the vibrating block is supported on the planar support portion 421. The vertical connection portion 422 has a bent structure to improve the stability and reliability during vibration. One end of the vertical connection portion 422 can be connected to the housing 10 through an adhesive adhesive. The other end of the vertical connection portion 422 can be connected to the bent portion 432 of the vibrating block through an adhesive adhesive. The bottom and sides of the vibrating block 43 are supported or abutted by the elastic connector 42, thereby improving the vibration stability and installation reliability of the vibrating block 43.

[0068] Reference Figure 3 , Figure 4 as well as Figure 6 As shown, the diaphragm system 20 includes a diaphragm 21 and a voice coil 22 inserted in the magnetic gap 33. The diaphragm 21 divides the receiving cavity 11 into a front cavity 111 and a rear cavity 112. The voice coil 22 vibrates under the action of the main magnet 31 and the auxiliary magnet 32 ​​to realize the vibration of the diaphragm system 20, thereby realizing the voice feedback prompt function of the multifunctional sound-generating device. When an alternating current is passed through the voice coil 22, under the action of the magnetic field, the voice coil 22 will be subjected to an alternating driving force, generating alternating motion, thereby driving the diaphragm 21 to vibrate together. The diaphragm 21 pushes the air to produce sound.

[0069] The diaphragm system 20 also includes a sound-emitting block 23, a frame 24, and a skeleton 25, wherein:

[0070] Reference Figure 3 , Figure 4 as well as Figure 12 As shown, the sound-emitting block 23 is provided with a sound-emitting channel 231, which connects the front cavity 111 and the sound outlet 121, so that the sound-emitting device is only connected to the outside through the sound-emitting channel 231. At the sound-emitting end of the sound-emitting channel 231, there is also a sealing ring 232 and a sealing plate 233. The sealing ring 232 is a ring structure, which is wrapped around the sound-emitting end of the sound-emitting channel 231. The sealing plate 233 covers the sealing ring 232, thereby sealing the sound-emitting end of the sound-emitting channel 231.

[0071] The frame 24 is used to support the diaphragm 21. In this embodiment, refer to... Figure 3 , Figure 4 , Figure 13 as well as Figure 14As shown, the diaphragm 21 includes a diaphragm 211 and a dome 212. The diaphragm 211 includes a first loop portion 2111, a first outer flange 2112 extending from the outer edge of the first loop portion 2111, and a first inner flange 2113 extending from the inner edge of the first loop portion 2111. The bottom of the first outer flange 2112 is fixed on the frame 24, the sound block 23 is supported on the top of the first outer flange 2112, the first inner flange 2113 is connected to the dome 212, and the bottom of the first inner flange 2113 is fixed on the frame 25. On the one hand, the frame 25 is fixedly connected to the voice coil 22, thereby realizing that the voice coil 22 drives the diaphragm 21 to vibrate. On the other hand, the force transmission between the dome 212 and the first loop portion 2111 is isolated, so that the dome 212 and the first loop portion 2111 vibrate independently.

[0072] Reference Figure 15 As shown, the frame 25 includes a frame main body 251 and a frame bending part 252 formed by bending the outer edge of the frame main body 251. A first inner flange 2113 is fixed to the frame main body 251. A third through hole 253 is provided in the middle of the frame main body 251. The inner edge of the third through hole 253 is bent to form a frame mounting part 254. The voice coil 22 is fixed to the frame mounting part 254.

[0073] Among them, reference Figure 3 , Figure 4 , Figure 9 , Figure 10 as well as Figure 11 As shown, the diaphragm system 20 also includes a second flexible circuit board 26 for electrical connection with the voice coil 22. One end of the second flexible circuit board 26 is connected to the frame body 251, and the other end is connected to the main circuit board 50. The main body of the second flexible circuit board 26 is attached to the bottom of the frame 24.

[0074] Reference Figure 3 , Figure 4 , Figure 5 as well as Figure 10 As shown, the housing 10 includes a main housing 12 and a secondary housing 13 fixed to one side of the main housing 12. A receiving cavity 11 is disposed inside the main housing 12. Both the main housing 12 and the secondary housing 13 are open box structures. A cover plate 14 is placed over the open to close the open. One end of the first flexible circuit board 45 and the second flexible circuit board 26 extends out of the main housing 12 and is electrically connected to one end of the main circuit board 50. The main body of the main circuit board 50 is located inside the secondary housing 13, and the other end of the main circuit board 50 extends out of the secondary housing 13.

[0075] The above description, based on the embodiments shown in the figures, details the structure, features, and effects of the present invention. The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A multifunctional sound-generating device, characterized in that, include: A housing, wherein a receiving cavity is provided within the housing; A sound-generating unit is disposed within the receiving cavity. The sound-generating unit includes a diaphragm system and a magnetic circuit system that drives the diaphragm system to vibrate and generate sound along a first direction. The magnetic circuit system includes a main magnet and a group of auxiliary magnets arranged around the main magnet to form a magnetic gap. The group of auxiliary magnets contains a plurality of auxiliary magnets distributed along a second direction, which is perpendicular to the first direction, and adjacent auxiliary magnets have opposite polarities. At least one drive coil group is disposed within the receiving cavity. The drive coil group contains a plurality of drive coils. Each drive coil group is disposed corresponding to one of the auxiliary magnet groups. In the first direction, the drive coil group is located on the side of the auxiliary magnet group opposite to the diaphragm system. There is a height difference between the drive coil group and the auxiliary magnet group. The orthographic projection of the drive coil group in the first direction is offset from the main magnet.

2. The multifunctional sound-generating device according to claim 1, characterized in that, In the second direction, a driving coil is provided between each of two adjacent auxiliary magnets. The driving coil includes a first coil portion and a second coil portion. The orthographic projection of the first coil portion in the first direction falls on one of the auxiliary magnets, and the orthographic projection of the second coil portion in the first direction falls on the other adjacent auxiliary magnet.

3. The multifunctional sound-generating device according to claim 2, characterized in that, The first coil portion and the second coil portion enclose each other to form a wire-passing hole, which is provided at the junction of two adjacent auxiliary magnets.

4. The multifunctional sound-generating device according to claim 1, characterized in that, The auxiliary magnet group has three auxiliary magnets, and the drive coil group has two drive coils, with each drive coil corresponding to two adjacent auxiliary magnets.

5. The multifunctional sound-generating device according to claim 1, characterized in that, The auxiliary magnet group and the driving coil group are each provided in two sets. The two sets of auxiliary magnet groups and the two sets of driving coil groups are symmetrically arranged on opposite sides of the main magnet along a third direction. The plane formed by the third direction and the second direction is perpendicular to the first direction.

6. The multifunctional sound-generating device according to claim 1, characterized in that, The magnetic circuit system also includes a main pole core and a secondary pole core. The main pole core is stacked on the main magnet. The secondary pole core includes a first secondary pole core portion and a second secondary pole core portion. The first secondary pole core portion is stacked on one of the secondary magnet groups, and the second secondary pole core portion is stacked on another secondary magnet group. The first secondary pole core portion and the second secondary pole core portion enclose each other to form a first through hole, which is provided corresponding to the main magnet.

7. The multifunctional sound-generating device according to claim 6, characterized in that, The magnetic circuit system also includes an upper magnet, which is stacked on the side of the main pole core opposite to the main magnet.

8. The multifunctional sound-generating device according to claim 1, characterized in that, The receiving cavity is provided with an elastic connector and a vibrating block. The drive coil group is disposed on the vibrating block, and the elastic connector is connected between the housing and the vibrating block.

9. The multifunctional sound-generating device according to claim 8, characterized in that, A second through hole is formed on the vibrating block. The orthographic projection of the main magnet in the first direction falls completely into the second through hole. The orthographic projections of the drive coil group and the auxiliary magnet group in the first direction partially fall into the second through hole.

10. The multifunctional sound-generating device according to claim 1, characterized in that, The magnetic circuit system is further provided with a magnetic yoke, the main magnet is arranged corresponding to the magnetic yoke, and the orthographic projection of the auxiliary magnet group in the first direction is offset from the magnetic yoke.

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