Vibration sound production device, vibration sound production module and electronic device

Abstract

Disclosed in the present invention are a vibration sound production device, a vibration sound production module and an electronic device. The vibration sound production device comprises a sound production unit, a first housing and a second vibration system, wherein the sound production unit comprises a first vibration system and a magnetic circuit system; the first housing is provided with an accommodating space, and the first housing comprises a top plate made of a non-magnetic material; the magnetic circuit system is supported on the side of the top plate away from the accommodating space, and the magnetic circuit system is provided with a magnetic gap; the first vibration system comprises a vibrating diaphragm assembly and a voice coil for driving the vibrating diaphragm assembly to vibrate, the voice coil being suspended in the magnetic gap and driving the vibrating diaphragm assembly to vibrate in a first direction; and the second vibration system is arranged in the accommodating space, and comprises a vibrator assembly and an elastic connector for connecting the vibrator assembly and the first housing, wherein the vibrator assembly comprises a counterweight and a driving coil arranged on the counterweight, the driving coil driving the vibrator assembly to vibrate in a second direction under the driving of the magnetic circuit system, with the second direction being perpendicular to the first direction.

Description

Vibration sound device, vibration sound module and electronic equipment Technical Field

[0001] The present invention relates to the technical field of electroacoustic conversion, and in particular to a vibration sound-generating device and a vibration sound-generating module and electronic equipment using the vibration sound-generating device. Background Art

[0002] Smart electronic devices, especially mobile phones, usually need to have both audio experience and vibration tactile experience functions. The audio experience comes from the speaker device, and the tactile vibration experience comes from the motor device. In the process of improving the user's audio and vibration tactile experience, the relevant technology usually sets the speaker device and the motor device separately, resulting in large space occupation in the smart electronic device and unsatisfactory layout effect, thereby affecting the user experience of the smart terminal.

[0003] Summary of the Invention

[0004] The main purpose of the present invention is to provide a vibration sound-generating device, a vibration sound-generating module and an electronic device, aiming to provide a vibration sound-generating device that integrates sound-generating function and vibration function into one. The vibration sound-generating device can effectively reduce the occupation of the internal space of the electronic device and improve the utilization rate of the internal space of the electronic device.

[0005] To achieve the above object, the present invention provides a vibration sound-generating device, comprising:

[0006] a sound-generating unit, the sound-generating unit comprising a first vibration system and a magnetic circuit system, the magnetic circuit system comprising a central magnetic portion and a side magnetic portion, a magnetic gap being formed between the central magnetic portion and the side magnetic portion, the first vibration system comprising a diaphragm assembly and a voice coil for driving the diaphragm assembly to vibrate, the voice coil being suspended in the magnetic gap and driving the diaphragm assembly to vibrate in a first direction;

[0007] a first housing having a receiving space, the first housing including a top plate made of a non-magnetic material, the central magnetic portion and the side magnetic portion being supported on a side of the top plate facing away from the receiving space, and the magnetic circuit system having a magnetic gap;

[0008] The second vibration system is arranged in the receiving space, the second vibration system includes a vibrator assembly and an elastic connecting part connecting the vibrator assembly and the first shell, the vibrator assembly includes a counterweight block and a driving coil arranged on the counterweight block, the driving coil includes two long sides arranged opposite to each other, along the first direction, the two long sides are respectively arranged opposite to the central magnetic part and the side magnetic part, and the driving coil drives the vibrator assembly to vibrate along the second direction under the drive of the magnetic circuit system, and the second direction is perpendicular to the first direction.

[0009] In one embodiment, in a projection along the first direction, an outer contour of the first housing does not exceed an outer contour of the sound emitting unit.

[0010] In one embodiment, in a projection along the first direction, the outer contour area of ​​the first housing does not exceed 5% of the outer contour area of ​​the sound unit.

[0011] In one embodiment, the first shell includes the top plate and side plates connected to the top plate, the top plate and the side plates enclose the receiving space, the top plate and the side plates are integrally formed or separately formed, and the top plate and the side plates are both made of non-magnetic material.

[0012] In one embodiment, the first shell includes a bottom plate, the top plate, and side plates connecting the top plate and the bottom plate, the bottom plate, the top plate, and the side plates enclose the accommodation space, the top plate and the side plates are integrally formed or separately formed, the bottom plate, the top plate, and the side plates are all made of non-magnetic materials, or the top plate and the side plates are all made of non-magnetic materials, and the bottom plate is made of magnetic material.

[0013] In one embodiment, the magnetic circuit system includes a central magnetic portion and side magnetic portions spaced apart on both sides of the central magnetic portion along the second direction, and the magnetic gap is formed between the central magnetic portion and the side magnetic portions.

[0014] In one embodiment, the central magnetic portion and the edge magnetic portion are both magnetized along the first direction, the magnetization directions of the central magnetic portion and the edge magnetic portion are opposite, and the magnetization directions of the two edge magnetic portions are the same.

[0015] In one embodiment, the driving coils include two, and the two driving coils are arranged along the second direction. Each of the driving coils includes two long sides arranged opposite to each other, and along the first direction, the two long sides are respectively arranged opposite to the central magnetic portion and the side magnetic portion.

[0016] In one embodiment, there are two elastic connectors, which are respectively arranged on both sides of the vibrator assembly along the second direction. The elastic connector includes connecting parts at both ends and a deformable part in the middle. One of the connecting parts is fixed to the vibrator assembly, and the other connecting part is fixed to the first shell. The deformable part extends from one connecting part to the other connecting part.

[0017] In one embodiment, the first shell is made of metal, the counterweight is made of metal, the elastic connector is made of metal, and the elastic connector and the counterweight are welded and fixed, or the elastic connector and the first shell are welded and fixed.

[0018] In one embodiment, the sound-emitting unit further includes a second shell fixedly connected to the magnetic circuit system, the second shell includes an annular frame located on a side of the magnetic circuit system away from the first shell, and the diaphragm assembly is combined with the second shell.

[0019] In one embodiment, the diaphragm assembly and the second housing are integrally formed by injection molding or hot pressing.

[0020] In one embodiment, the diaphragm assembly is provided with an air hole, and the air hole is covered with a waterproof and breathable member.

[0021] In one embodiment, the air holes are provided in the middle area and / or edge area of ​​the diaphragm assembly.

[0022] In one embodiment, the ventilation hole is one or the ventilation hole is a plurality of array micropores.

[0023] In one embodiment, the waterproof breathable member is a waterproof breathable membrane made of ePTFE (expanded polytetrafluoroethylene) material or PTFE (polytetrafluoroethylene) material, or the waterproof breathable member is a waterproof breathable net.

[0024] In one embodiment, a hydrophobic layer and / or an oleophobic layer is provided on the waterproof breathable member.

[0025] In one embodiment, the diaphragm assembly includes a diaphragm and a vibration plate, wherein the vibration plate is disposed at the center of the diaphragm.

[0026] The diaphragm is a porous structure layer, and / or the vibration plate is a porous structure layer.

[0027] In one embodiment, the diaphragm is a material layer with a porous structure made of any one of polyimide, polyester fiber, polyamide, polytetrafluoroethylene, polycarbonate, polyethylene, and polyvinylidene fluoride.

[0028] In one embodiment, the vibration plate is an organic aerogel layer, and the organic aerogel layer is a material layer with a porous structure made of any one of polyamides, polyimides, polyesters, polyurethanes, aldehydes, polyolefins, polysaccharides and silicones.

[0029] In one embodiment, the vibration sound-generating device has a width along a second direction and a length along a third direction, the second direction and the third direction are perpendicular to each other and perpendicular to the first direction, and the length is ≥1.3*the width.

[0030] In one embodiment, when the vibration sound-generating device is worn by a user, the first direction is perpendicular to the wearing part of the user;

[0031] Alternatively, when the vibration sound-generating device is placed on a fixed table, the first direction is perpendicular to the fixed table.

[0032] The present invention also proposes a vibration sound-generating module, which includes a module shell and the above-mentioned vibration sound-generating device. The vibration sound-generating device is arranged in the module shell, and one end of the vibration sound-generating device provided with the first vibration system is connected to the inner wall of the module shell.

[0033] The present invention further provides an electronic device, which includes a device housing and the above-mentioned vibration sound-generating device arranged in the device housing.

[0034] In one embodiment, the second direction is a thickness direction of the electronic device;

[0035] When the electronic device is worn by a user, the second direction is perpendicular to the wearing part of the user;

[0036] Alternatively, when the electronic device is placed on a fixed table, the second direction is perpendicular to the fixed table.

[0037] The vibration sound-generating device of the present invention integrates a sound-generating unit and a second vibration system. Compared to traditional devices with separate sound-generating and vibration units, this can effectively reduce the internal space occupied by electronic devices and improve the internal space utilization of electronic devices. The first and second vibration systems share a common magnetic circuit system, solving the static magnetostriction problem between different magnetic circuit systems in traditional structures. It can also reduce the use of components and lower production costs. The second vibration system adopts a linear vibration structure, which has shorter start-up and shutdown times and a stronger vibration sensation than a rotor motor structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0039] FIG1 is a schematic structural diagram of a vibration sound-generating device according to the present invention;

[0040] FIG2 is a schematic structural diagram of the vibration sound-generating device of the present invention from another angle;

[0041] FIG3 is a schematic cross-sectional view of the vibration sound-generating device of the present invention;

[0042] FIG4( a ) is a schematic diagram of the combination of the first vibration system and part of the fixed assembly of the vibration sound-generating device of the present invention;

[0043] FIG4( b ) is a schematic cross-sectional view of the structure in FIG4( a );

[0044] FIG5 is a schematic diagram of the separation of the structure in FIG4( a );

[0045] FIG6 is a further separation schematic diagram of the structure in FIG5 ;

[0046] FIG7( a ) is a schematic diagram of the assembly of the first housing, the second vibration system, and the FPCB of the vibration sound-generating device according to one embodiment of the present invention;

[0047] FIG7( b ) is a schematic cross-sectional view of the structure in FIG7( a );

[0048] FIG8 is a schematic diagram of the separation of the structure in FIG7( a );

[0049] FIG9 is a further separation schematic diagram of the structure in FIG8 ;

[0050] FIG10 is a schematic cross-sectional view of the vibration sound-generating device of the combination of FIG4( a) and FIG7( a);

[0051] FIG11( a ) is a schematic diagram of the assembly of a first housing, a second vibration system, and an FPCB of a vibration sound-generating device according to another embodiment of the present invention;

[0052] FIG11( b ) is a schematic cross-sectional view of the structure in FIG11( a );

[0053] FIG12 is a schematic diagram of the separation of the structure in FIG11( a );

[0054] FIG13 is a schematic cross-sectional view of the vibration sound-generating device of the combination of FIG4( a) and FIG11( a);

[0055] FIG14( a) is a schematic diagram of the combination of a first housing, a second vibration system, and an FPCB of a vibration sound-generating device according to yet another embodiment of the present invention;

[0056] FIG14( b ) is a schematic cross-sectional view of the structure in FIG14( a );

[0057] FIG15 is a schematic diagram of the separation of the structure in FIG14( a );

[0058] FIG16 is a schematic cross-sectional view of the vibration sound-generating device of the combination of FIG4( a) and FIG14( a);

[0059] FIG17 is a schematic structural diagram of an FPCB of a vibration sound-generating device according to an embodiment of the present invention;

[0060] FIG18( a ) is a schematic diagram of an installation of the FPCB in FIG17 at one angle;

[0061] FIG18( b ) is a schematic diagram illustrating the installation of the FPCB in FIG17 from another angle;

[0062] FIG19 is a schematic structural diagram of an FPCB of a vibration sound-generating device according to another embodiment of the present invention;

[0063] FIG20( a ) is a schematic diagram of an installation of the FPCB in FIG19 at one angle;

[0064] FIG20( b ) is a schematic diagram illustrating the installation of the FPCB in FIG19 from another angle;

[0065] FIG21 is a schematic structural diagram of the second connecting portion of the FPCB in FIG19 ;

[0066] FIG22 is a schematic diagram of various structures of the second connecting portion of the FPCB in FIG21 ;

[0067] FIG23 is an exploded schematic diagram of a first vibration system and a second housing of a vibration sound-generating device according to an embodiment of the present invention;

[0068] FIG24 is an exploded schematic diagram of the first vibration system and the second housing of a vibration sound-generating device according to another embodiment of the present invention;

[0069] FIG25 is a cross-sectional view of a vibration sound-generating module according to an embodiment of the present invention;

[0070] FIG26 is a perspective view of an electronic device according to the present invention.

[0071] Description of Figure Numbers:

[0072] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0073] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0074] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0075] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0076] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0077] Electronic devices usually need to have audio experience and vibration tactile experience functions. The audio experience comes from the speaker device, and the tactile vibration experience comes from the motor device. Related technologies usually set the speaker device and the motor device separately, resulting in a large space being occupied in the electronic device, especially causing a relatively large impact on the battery volume, which ultimately affects the usage time of the electronic device and thus affects the user experience.

[0078] To address the above issues, this solution provides a vibration sound-generating device 100 that innovatively integrates a speaker and a motor. Compared to traditional devices with separate speakers and motors, this device can effectively reduce the internal space occupied by the electronic device 200 and improve the internal space utilization of the electronic device 200. The electronic device 200 of this solution can be a portable mobile electronic product such as a mobile phone or iPad, or a wearable device such as a watch, VR, or AR, etc., without limitation.

[0079] 1 to 25 , in an embodiment of the present invention, a vibration sound-generating device 100 includes a sound-generating unit 1, a first housing 11, and a second vibration system 4. The first housing 11 has a receiving space. The sound-generating unit 1 includes a first vibration system 3 and a magnetic circuit system 2. The magnetic circuit system 2 is supported on a side of the first housing 11 away from the receiving space. The magnetic circuit system 2 has a magnetic gap. The first vibration system 3 is disposed on a side of the magnetic circuit system 2 away from the first housing 11. The first vibration system 3 includes a diaphragm assembly 31 and a voice coil 32 that drives the diaphragm assembly 31 to vibrate. The voice coil 32 is suspended in the magnetic gap and drives the diaphragm assembly 31 to vibrate in a first direction. The second vibration system 4 is disposed in the receiving space. The second vibration system 4 includes a vibrator assembly 41 and an elastic connector 42 connecting the vibrator assembly 41 and the first housing 11. The vibrator assembly 41 includes a counterweight 412 and a drive coil 411 disposed on the counterweight 412. The drive coil 411 is disposed opposite the magnetic circuit system 2 and drives the vibrator assembly 41 to vibrate in a second direction, which is perpendicular to the first direction.

[0080] Specifically, the magnetic circuit system 2 includes a central magnetic portion 21 and a side magnetic portion 22, with a magnetic gap formed between the central magnetic portion 21 and the side magnetic portion 22. The first housing 11 includes a top plate 111 made of a non-magnetic material. The central magnetic portion 21 and the side magnetic portion 22 are supported on a side of the top plate 111 facing away from the receiving space. The drive coil 411 includes two long sides arranged opposite each other, and along a first direction, the two long sides are respectively arranged opposite the central magnetic portion 21 and the side magnetic portion 22. With this arrangement, the structure of the vibration sound-generating device 100 is more compact, and the voice coil 32 and the drive coil 411 can simultaneously utilize the magnetic flux lines of the magnetic circuit system 2, and vibrate under force in the magnetic field of the magnetic circuit system 2.

[0081] In this embodiment, the first shell 11 can be made of metal. Metal has high hardness and can better support the magnetic circuit system 2. Compared with the shell made of plastic material, the shell made of metal can be thinner, further reducing the size of the vibration sound-generating device 100 and reducing the space occupied by the electronic device. The counterweight 412 can be made of metal, such as tungsten steel, which can improve the quality of the vibrator assembly 41 and enhance the vibration sense. The drive coil 411 is arranged on the side of the counterweight 412 close to the magnetic circuit system 2, and is arranged opposite to the magnetic circuit system 2 so that more magnetic flux lines pass through the drive coil 411.

[0082] The vibration sound-generating device 100 of the present invention innovatively integrates the sound-generating unit 1 and the second vibration system 4. Compared to conventional devices in which the sound-generating unit and the vibration unit are independent, this device can effectively reduce the internal space occupied by the electronic device and improve the internal space utilization of the electronic device. The first vibration system 3 and the second vibration system 4 share the magnetic circuit system 2, which solves the static magnetoelectric force problem between the different magnetic circuit systems in conventional structures where the sound-generating unit and the vibration unit each contain a magnetic circuit system. At the same time, it can reduce the use of parts, lower production costs, and further reduce the size of the vibration sound-generating device 100, facilitating the miniaturization design of the vibration sound-generating device 100.

[0083] In this embodiment, the vibrator assembly 41 vibrates along the second direction, that is, the second vibration system 4 adopts a linear vibration structure. Compared with the rotor motor structure, it has the advantages of shorter start and stop time, stronger vibration feeling, and easier control, which can enhance the user experience.

[0084] In one embodiment, the vibration sound-generating device 100 has a width along a second direction and a length along a third direction. The second and third directions are perpendicular to each other and to the first direction. The length of the vibration sound-generating device 100 is greater than its width. This means that the vibration sound-generating device 100 has a narrow and long structure, which, when used in electronic devices, can better fit the space of the electronic device.

[0085] Optionally, when the vibration sound-generating device 100 is worn on a user, the second direction is perpendicular to the user's wearing part, and the vibrator assembly 41 vibrates along the second direction to enhance the wearer's wearing experience. Alternatively, when the vibration sound-generating device 100 is placed on a fixed table, the second direction is perpendicular to the fixed table. It is understandable that in this embodiment, when the vibration sound-generating device 100 is applied to an electronic device, its width direction is parallel to the thickness direction of the electronic device.

[0086] Optionally, the ratio of the length to the width of the vibration sound-generating device 100 is greater than or equal to 1.3:1, that is, the length / width value can be 5, 4, 3, 2.5, 2, 1.5, 1.3, etc., to flexibly match the space of different electronic devices. In actual applications, the size of the vibration sound-generating device 100 can be flexibly adjusted according to the reserved space of the electronic device, and this is not limited here.

[0087] In order to further reduce the size of the vibration sound-generating device 100 and improve the compactness of the vibration sound-generating device 100, so as to reduce the space occupied by the vibration sound-generating device module 300 or the electronic device 200 when the vibration sound-generating device 100 is used in the vibration sound-generating device module 300 or the electronic device 200, optionally, in the projection along the first direction, the outer contour of the first shell 11 does not exceed the outer contour of the sound-generating unit 1; or, in the projection along the first direction, the outer contour area of ​​the first shell 11 does not exceed 5% of the outer contour area of ​​the sound-generating unit.

[0088] In this embodiment, the first housing 11 can be a structure having a receiving space, such as a frame or a box, and can be integrally formed or formed by a combination of multiple plates. As one embodiment, as shown in Figures 7 to 16, the first housing 11 includes a bottom plate 112, a top plate 111, and side plates 113 connecting the bottom plate 112 and the top plate 111. The bottom plate 112, the top plate 111, and the side plates 113 enclose a receiving space, and the magnetic circuit system 2 is provided on the top plate 111. The top plate 111 supports the magnetic circuit system 2, thereby improving the overall stability of the product structure.

[0089] In this embodiment, the bottom plate 112, top plate 111, and side plates 113 are all made of non-magnetic materials, or the side plates 113 and top plate 111 are made of non-magnetic materials, while the bottom plate 112 is made of a magnetic material. The magnetic material of the bottom plate 112 can attract more magnetic flux lines to pass through the drive coil 411, thereby increasing the driving force of the drive coil 411 and further improving the vibration performance of the second vibration system 4.

[0090] Of course, in other embodiments, the first housing 11 includes a top plate 111 and side plates 113 connected to the top plate 111 . The top plate 111 and the side plates 113 form a receiving space. Both the top plate 111 and the side plates 113 are made of non-magnetic materials.

[0091] In the above embodiment, the top plate 111 and the side plates 113 may be integrally formed, or may be fixedly connected by bonding or welding.

[0092] In one embodiment, as shown in Figures 5, 10, 13, and 16, the magnetic circuit system 2 includes a central magnetic portion 21 and side magnetic portions 22 spaced apart on either side of the central magnetic portion 21 along a second direction, with a magnetic gap formed between the central magnetic portion 21 and the side magnetic portions 22. The central magnetic portion 21 includes a central magnet 211 and a central magnetic conductive plate 212 disposed on the side of the central magnet 211 away from the second vibration system 4. The side magnetic portions 22 include side magnets 221 and side magnetic conductive plates 222 disposed on the side of the side magnet 221 away from the second vibration system 4.

[0093] Both the central magnetic portion 21 and the side magnetic portion 22 are magnetized along the first direction. The magnetization directions of the central magnetic portion 21 and the side magnetic portion 22 are opposite, and the magnetization directions of the two side magnetic portions 22 are the same. With this arrangement, the voice coil 32 is subjected to a driving force along the first direction in the magnetic field, driving the diaphragm assembly 31 to vibrate along the first direction and produce sound.

[0094] Optionally, two drive coils 411 are provided, arranged along the second direction. Each drive coil 411 includes two long sides that are opposed to each other, and along the first direction, the two long sides are respectively opposed to the central magnetic portion 21 and the side magnetic portion 22. With this arrangement, when energized, the drive coils 411 vibrate under force in the magnetic field, driving the vibrator assembly 41 to vibrate along the second direction. In this embodiment, the currents flowing through the two drive coils 411 are in opposite directions.

[0095] It should be noted that in the vibration sound-generating device 100 of the present invention, no magnetic conductive plate is arranged between the magnetic circuit system 2 and the second vibration system 4, and the top plate 111 of the first shell 11 is also made of non-magnetic material. In this way, the magnetic flux lines of the magnetic circuit system 2 can pass through the driving coil 411, so that when the driving coil 411 is energized, the vibrator assembly 41 is excited to vibrate by the electromagnetic force.

[0096] In one embodiment, as shown in Figures 11 to 13, a through hole 1111 communicating with the accommodating space is provided on the top plate 111 of the first shell 11, and the long side of the driving coil 411 is arranged opposite to the central magnetic portion 21 and / or the side magnetic portion 22 through the through hole 1111, and both ends of the central magnetic portion 21 and the side magnetic portion 22 along the third direction are supported on the top plate 111 around the through hole 1111, and the third direction is perpendicular to the first direction and the second direction, and the central magnetic portion 21 and / or the side magnetic portion 22 have an extension portion extending toward the through hole 1111.

[0097] In this embodiment, the distance between the extension portion and the drive coil 411 is further reduced through the through hole 1111, so that the magnetic flux lines of the magnetic circuit system 2 pass through the drive coil 411 more, thereby increasing the magnetic field strength passing through the drive coil 411 and increasing the driving force on the drive coil 411.

[0098] Specifically, the magnetic circuit system 2 includes a central magnetic portion 21 and side magnetic portions 22 spaced apart on both sides of the central magnetic portion 21 along the second direction. The central magnetic portion 21 has a first extension portion 2111 extending into the through hole 1111, and the side magnetic portion 22 has a second extension portion 2211 extending into the through hole 1111.

[0099] More specifically, the central magnetic portion 21 includes a central magnet 211 and a central magnetic conductive plate 212 disposed on the side of the central magnet 211 away from the second vibration system 4. The side magnetic portion 22 includes a side magnet 221 and a side magnetic conductive plate 222 disposed on the side of the side magnet 221 away from the second vibration system 4. The central magnet 211 has a first extension 2111, and the side magnet 221 has a second extension 2211. The long sides of the driving coil 411 are disposed opposite the first extension 2111 and the second extension 2211, respectively.

[0100] In this embodiment, the side of the side magnet portion 22 closest to the central magnet portion 21 faces the through-hole 1111 and is provided with a protruding second extension portion 2211. The side of the side magnet portion 22 further from the central magnet portion 21 is supported and fixed to the top plate 111. In other words, the second extension portion 2211 is formed by extending only a portion of the side magnet portion 22, thereby reducing production costs. At the same time, the ends and outer sides of the side magnet portion 22 along the third direction are still supported by the top plate 111, improving the installation stability of the magnetic circuit system 2.

[0101] In this embodiment, the long side of the drive coil 411 includes a straight segment and two curved segments at either end. Along the first direction, the through hole 1111 is positioned opposite the straight segment. The straight segment of the drive coil 411 has a higher utilization rate in the magnetic field than the curved segment. The through hole 1111 is positioned opposite the straight segment, further positioning the extension portion opposite the straight segment, thereby increasing the driving force exerted by the magnetic circuit system 2 on the drive coil 411.

[0102] In another embodiment, as shown in Figures 14 to 16, the top plate 111 of the first housing 11 is provided with a through hole 1111 communicating with the accommodating space. Along the first direction, the projection of the drive coil 411 is located within the through hole 1111, and the drive coil 411 is disposed opposite the magnetic circuit system 2 via the through hole 1111. In this manner, without changing the magnetic circuit system 2, the drive coil 411 can be disposed closer to the magnetic circuit system 2, which can also reduce the distance between the drive coil 411 and the magnetic circuit system 2, thereby enhancing the driving force exerted by the magnetic circuit system 2 on the drive coil 411.

[0103] Optionally, along the first direction, a portion of the driving coil 411 extends into the through hole 1111 , so that the driving coil 411 is disposed further close to the magnetic circuit system 2 .

[0104] Alternatively, along the first direction, the distance between the surface of the driving coil 411 close to the magnetic circuit system 2 and the surface of the magnetic circuit system 2 close to the driving coil 411 is less than 1 mm.

[0105] In this embodiment, both ends of the central magnetic portion 21 and the side magnetic portion 22 along the third direction are supported on the top plate 111 around the through hole 1111. The third direction is perpendicular to the first direction and the second direction to ensure the installation reliability of the magnetic circuit system 2.

[0106] Furthermore, through-hole 1111 is provided in top plate 111 and extends in the second direction to side plate 113. Thus, when the distance between drive coil 411 and magnetic circuit system 2 is less than the thickness of top plate 111, interference between vibrator assembly 41 and top plate 111 or side plate 113 can be reduced.

[0107] Alternatively, the side of the edge magnetic portion 22 close to the central magnetic portion 21 is opposite to the through hole 1111 , and the side of the edge magnetic portion 22 away from the central magnetic portion 21 is supported and fixed on the top plate 111 , thereby improving the installation stability of the magnetic circuit system 2 .

[0108] In each of the above embodiments, the magnetic gap extends along the third direction, and the drive coil 411 is in the form of an elongated strip with its length along the third direction. Thus, the magnetic circuit system 2 and the drive coil 411 are configured to maximize the shape of the vibration sound-generating device 100, thereby maximizing the driving force on the vibrator assembly 41 in the second direction and improving the vibration performance of the second vibration system 4.

[0109] In one embodiment, as shown in Figures 7 to 16, the second vibration system 4 is provided with two elastic connectors 42, which are respectively provided on both sides of the vibrator assembly 41 along the first direction. The elastic connector 42 includes connecting portions at both ends and a deformable portion in the middle. One connecting portion is fixed to the vibrator assembly 41, and the other connecting portion is fixed to the housing. The deformable portion extends from one connecting portion to the other connecting portion. Specifically, the deformable portion extends from one connecting portion to the other connecting portion along the third direction.

[0110] In this embodiment, the elastic connector 42 can be made of metal, such as stainless steel. The elastic connector 42 is generally a straight-line structure, which reduces the space occupied in the second direction and is conducive to the thin design of the second vibration system 4. In this embodiment, the two elastic connectors 42 are respectively arranged on both sides of the vibrator assembly 41, which can better support the vibrator assembly 41 and improve the vibration stability of the vibrator assembly 41. It should be noted that the elastic connector 42 can also have other settings. For example, there are multiple elastic connectors 42, and the multiple elastic connectors 42 are arranged at both ends of the vibrator assembly 41 along the third direction or at the end area of ​​the vibrator assembly 41.

[0111] As one embodiment, the first shell 11, the counterweight 412, and the elastic connector 42 are all made of metal. The elastic connector 42 and the counterweight 412 are welded and fixed, or the elastic connector 42 and the shell are welded and fixed to improve the connection stability of the elastic connector 42.

[0112] To further enhance the connection stability between the elastic connector 42 and the first housing 11 and the counterweight 412, the second vibration system 4 further includes a clamping member 44. The clamping member 44 is connected to two connecting portions of the elastic connector 42, one connecting portion being provided between the clamping member 44 and the first housing 11, and the other connecting portion being provided between the clamping member 44 and the counterweight 412. Specifically, the clamping member 44 is a block-shaped structure and is used to enhance the connection firmness between the connecting portion and the counterweight 412, or between the connecting portion and the first housing 11.

[0113] As a specific embodiment, the first housing 11, the counterweight 412, the elastic connector 42, and the clamping member 44 are all made of metal. The clamping member 44, the elastic connector 42, and the counterweight 412 are welded together, that is, the clamping member 44 clamps one of the connecting portions to the counterweight 412; the clamping member 44, the elastic connector 42, and the housing are welded together, that is, the clamping member 44 clamps the other connecting portion to the first housing 11. This arrangement can make the connection between the elastic connector 42 and the counterweight 412 or between the elastic connector 42 and the first housing 11 more secure, further improving the reliability of the second vibration system 4.

[0114] To further optimize the vibration performance of the second vibration system 4, the second vibration system 4 also includes buffers 43, which are distributed along the second direction on both sides of the vibrator assembly 41. Optionally, the buffers 43 are made of foam or silicone. The buffers 43 can cushion the impact of the vibrator assembly 41 colliding with the first housing 11, thereby improving the vibration performance of the second vibration system 4.

[0115] Optionally, there are four buffer members 43, which are respectively fixed to the two ends of the two elastic connecting members 42 along the third direction. Specifically, they can be arranged on the connecting portion.

[0116] In one embodiment, the sound unit 1 also includes a second shell 12, which is connected to the magnetic circuit system. The second shell 12 includes an annular frame 121 located on the side of the magnetic circuit system 2 away from the first shell 11. The diaphragm assembly 31 is combined with the inner wall of the annular frame 121, and the diaphragm assembly 31 and the annular frame 121 are integrally injection molded or hot-pressed.

[0117] In one embodiment, the annular frame 121 is made of plastic, and the diaphragm assembly 31 includes a diaphragm 311 and a vibration plate 312, with the vibration plate 312 being located in the center of the diaphragm 311. The diaphragm 311 can be integrally formed with the annular frame 121 using liquid silicone rubber through an injection molding process. Specifically, the annular frame 121 is placed as an insert in a mold, and then liquid silicone rubber is injected into the mold to form the diaphragm 311. During the injection process, the liquid silicone rubber combines with the annular frame 121, thereby connecting the two.

[0118] Alternatively, the diaphragm 311 is made of solid silicone rubber, AEM rubber or ACM rubber and is integrally formed with the annular frame 121 through a hot pressing process.

[0119] In this embodiment, the diaphragm assembly 31 and the annular frame 121 are integrally formed, which can improve the connection stability between the two. No glue is required between the diaphragm assembly 31 and the annular frame 121, thereby meeting the high-level waterproof requirements of electronic devices such as smart watches.

[0120] Optionally, the outer peripheral wall of the annular frame 121 is also combined with a waterproof sealing ring 15, and the annular frame 121 and the waterproof sealing ring 15 are an integrally molded structure. Specifically, the waterproof sealing ring 15 can be formed integrally with the annular frame 121 by an injection molding process using liquid silicone rubber; or, the waterproof sealing ring 15 is formed integrally with the annular frame 121 by a hot pressing process using one of solid silicone rubber, AEM rubber or ACM rubber. Furthermore, after the waterproof sealing ring 15 is integrally molded with the annular frame 121, the diaphragm 311 is combined with the annular frame 121 by a hot pressing process, that is, the diaphragm assembly 31, the annular frame 121, and the waterproof sealing ring 15 are an integrally molded structure, and the combined annular frame 121 has a higher waterproof grade.

[0121] In one embodiment, the second housing 12 further includes two plastic parts 13 . The two plastic parts 13 are spaced apart at two ends of the second housing 12 . The two plastic parts 13 are used to positionally mount the edge magnetic part 22 .

[0122] Specifically, the side magnetic conductive plates 222 of the two side magnetic portions 22 are integrally injection-molded with the plastic portion 13. A retaining groove 131 is formed between the two plastic portions 13, and the side magnets 221 are disposed within the retaining groove 131. It should be noted that both ends of the two side magnetic conductive plates 222 are injection-molded with the plastic portion 13, and the two second magnetic conductive plates can be either integral or separate. The use of the plastic portion 13 to injection-mold the side magnetic conductive plates 222 and form a magnet retaining structure effectively prevents the magnetic assembly from separating or falling off when the product is dropped, thereby enhancing the secure connection of the magnetic assembly.

[0123] Optionally, a conductive terminal is injection-molded on the plastic part 13, and the inner solder pad of the conductive terminal is conductively connected to the lead of the voice coil 32. The outer solder pad of the conductive terminal is exposed on the outer wall of the plastic part 13, which is convenient for conductive connection with the FPCB5 (flexible circuit board) and then conductive connection with the external circuit.

[0124] In this embodiment, one of the annular frame 121 and the plastic portion 13 is provided with a first positioning protrusion, and the other is provided with a first positioning recess. The annular frame 121 and the plastic portion 13 are positioned and connected by the first positioning protrusion and the first positioning recess. The first positioning recess can be a hole, a groove, or other structure, without limitation.

[0125] Optionally, one of the plastic portion 13 and the first housing 11 is provided with a second positioning protrusion, and the other is provided with a second positioning recess, so that the plastic portion 13 and the first housing 11 are positioned and connected by the cooperation between the second positioning protrusion and the second positioning recess. The second positioning recess can be a hole or a groove, etc., which is not limited here.

[0126] In one embodiment, the sound-generating unit 1 further includes a front cover 14 disposed on a side of the diaphragm assembly 31 away from the magnetic circuit system 2. The front cover 14 is connected to the periphery of the diaphragm assembly 31 and is made of metal. The front cover 14 is provided with a through hole 1111 facing the center area of ​​the diaphragm assembly 31. During the transportation and installation of the vibration sound-generating device 100, the front cover 14 can effectively prevent the diaphragm assembly 31 from being damaged by external forces. The through hole 1111 provided in the front cover 14 facilitates the outward radiation of sound from the diaphragm assembly 31.

[0127] The vibration sound-generating device 100 of the present invention further includes an FPCB 5, which includes a first conductive end 5111, a second conductive end 521, and a third conductive end 522. The first conductive end 5111 provides an electrical signal to the drive coil 411, the second conductive end 521 provides an electrical signal to the voice coil 32, and the third conductive end 522 is electrically connected to the first conductive end 5111 and the second conductive end 521, respectively, and is electrically connected to an external circuit. In this embodiment, the FPCB 5 simultaneously provides electrical signals to the drive coil 411 and the voice coil 32, reducing the number of components in the vibration sound-generating device 100 and facilitating an integrated design of the vibration sound-generating device 100.

[0128] As shown in Figures 1 to 3 and Figures 7 to 16, the FPCB 5 includes a first portion 51 disposed within the first housing 11 and a second portion 52 extending outside the first housing 11. The first portion 51 is provided with a first conductive end 5111, and the second portion 52 is provided with a second conductive end 521 and a third conductive end 522. The first conductive end 5111 is connected to the drive coil 411, the second conductive end 521 extends to the outside of the sound unit 1 and is connected to the conductive terminal of the sound unit 1, and the third conductive end 522 is connected to an external circuit. In this embodiment, the conductive terminal is welded to the lead of the voice coil 32 to achieve electrical connection between the voice coil 32 and the second conductive end 521. Specifically, the second conductive end 521 extends to the plastic portion 13 of the sound unit 1 and is connected to the conductive terminal in the plastic portion 13.

[0129] To facilitate the vibration of the FPCB5 along with the vibrator assembly 41 and improve the vibration reliability of the second vibration system 4, the first part 51 includes a first connecting portion 511, a second connecting portion 512, and a third connecting portion 513, which are connected to each other. The first connecting portion 511 is provided on the counterweight 412 and is located on the same side of the counterweight 412 as the drive coil 411. The first connecting portion 511 has a first conductive end 5111. The third connecting portion 513 is provided on the first housing 11. The second connecting portion 512 connects the first connecting portion 511 and the third connecting portion 513. The second connecting portion 512 has a deformable structure. Specifically, the third connecting portion 513 is provided on the bottom plate 112. The second connecting portion 512 bends and extends from the first connecting portion 511 to the side of the counterweight 412 away from the drive coil 411 and is connected to the third connecting portion 513.

[0130] As shown in Figure 17, the second connecting portion 512 is at least partially wavy, and the extension direction of the wave is the second direction, or, as shown in Figure 19, the second connecting portion 512 includes an elastic cantilever, and the extension direction of the cantilever is set at an angle to the second direction, thereby improving the deformation resistance of FPCB5.

[0131] It should be noted that, as shown in Figures 21 and 22, the extension direction of the cantilever is generally along the third direction, and the cantilever has various designs. When the cantilever extends along the third direction as a whole, the cantilever can have a bent structure, an arc structure, or a wavy structure.

[0132] Optionally, the counterweight 412 has an escape space 4121 for evading the second connecting portion 512, thereby reducing the volume occupied by the FPCB 5 in the receiving space. The escape space 4121 can be a groove or a hollow hole, etc., which is not limited here.

[0133] In one embodiment, the first part 51 of the FPCB5 also includes a fourth connecting portion 514, and the fourth connecting portion 514 and the first connecting portion 511 are respectively arranged at both ends of the vibrator assembly 41, and the fourth connecting portion 514 has a fourth conductive end 5141, and the fourth conductive end 5141 is used to connect the two driving coils 411 in series.

[0134] More specifically, in order to better support the FPCB 5 and improve the stability of the electrical connection of the FPCB 5 , the second portion is at least partially attached to the surface of the housing.

[0135] In the vibration sound-generating device 100 of the present invention, the diaphragm assembly 31 may also have a waterproof and breathable structure. During the operation of the first vibration system 3, the air pressure on both sides of the diaphragm assembly 31 can be balanced, ensuring the vibration stability of the diaphragm assembly 31 and improving the heat dissipation performance of the first vibration system 3. The waterproof and breathable structure provided on the diaphragm assembly 31 can save material, production, and assembly costs, while making the design of the vibration sound-generating device 100 more flexible and unrestricted.

[0136] The waterproof and breathable structure can be arranged in a variety of ways. As shown in Figures 23 and 24, the diaphragm assembly 31 is provided with a breathable hole 313, which is covered with a waterproof breathable member 314. Specifically, the breathable hole 313 can be arranged in the middle area or the edge area of ​​the diaphragm assembly 31, or the breathable hole 313 can be arranged in the middle area and the edge area. The technicians can flexibly select the appropriate method based on the structure of the diaphragm assembly 31.

[0137] Optionally, the vent hole 313 can be a through hole 1111 or a plurality of micropores in an array. The waterproof breathable member 314 can be a waterproof breathable membrane made of ePTFE (expanded polytetrafluoroethylene) or PTFE (polytetrafluoroethylene), or a waterproof breathable mesh made of other fabric materials combined with an adhesive such as pressure-sensitive adhesive, heat-sensitive adhesive, or photosensitive adhesive.

[0138] Furthermore, the surface of the waterproof breathable member 314 may also be provided with a hydrophobic layer and / or an oleophobic layer. A specific embodiment involves coating the surface of the waterproof breathable member 314 with a hydrophobic agent, an oleophobic agent, or other materials to achieve enhanced breathability, waterproofing, and dustproofing to meet various application scenarios. It is understood that in this embodiment, the waterproof breathable member 314 has certain damping properties to meet the acoustic performance requirements of the sound unit.

[0139] Alternatively, as shown in FIG6 , the diaphragm assembly 31 includes a diaphragm 311 and a vibration plate 312. The vibration plate 312 is disposed in the central region of the diaphragm 311. The diaphragm 311 is a porous structure layer. Alternatively, the vibration plate 312 is a porous structure layer, or both the diaphragm 311 and the vibration plate 312 are porous structure layers. In this embodiment, the vibration plate 312 is disposed in the central region of the diaphragm 311. The diaphragm 311 may have a through hole 1111, the vibration plate 312 covers the through hole 1111, or the diaphragm 311 does not have a through hole 1111. This is a conventional structure of the diaphragm assembly 31 and will not be elaborated on herein.

[0140] Furthermore, the diaphragm 311 is a porous material layer made of any one of polyimide, polyester fiber, polyamide, polytetrafluoroethylene, polycarbonate, polyethylene, and polyvinylidene fluoride, or a porous material layer made of a combination of several materials. The pore size of the porous material layer is larger than the diameter of an air molecule and smaller than the diameter of a water molecule. The diaphragm 311 made of the above materials can balance the pressure difference on both sides of the diaphragm assembly 31, improve the vibration performance of the diaphragm assembly 31, and flexibly adjust the elastic modulus of the diaphragm 311 during use.

[0141] The vibration plate 312 is an organic aerogel layer. The organic aerogel layer is made of any one of polyamides, polyimides, polyesters, polyurethanes, aldehydes, polyolefins, polysaccharides and silicones, or a combination of several materials. The organic aerogel layer has a porous structure with a pore size larger than the diameter of an air molecule and smaller than the diameter of a water molecule. The organic aerogel layer made of the above materials has a porous structure, so that the organic aerogel layer can balance the pressure difference on both sides of the diaphragm assembly 31 and improve the vibration performance of the diaphragm assembly 31. At the same time, the organic aerogel layer is light in weight and has a large modulus. Different types of organic aerogels also have different characteristics, and the specific selection can be made according to the use environment of the dome.

[0142] Optionally, the organic aerogel layer includes an organic aerogel matrix and a reinforcing material dispersed within the organic aerogel matrix, wherein the reinforcing material is carbon fiber, textile fiber, or metal particles. The reinforcing material can enhance the structural strength of the vibration plate 312, thereby increasing its stiffness and damping performance, further improving the acoustic performance of the sound unit.

[0143] Optionally, the organic aerogel layer includes an organic aerogel matrix and a thermally conductive material dispersed within the organic aerogel matrix. The thermally conductive material is at least one of aluminum, copper, silver, magnesium, tin, lead, and iron, or at least one of boron nitride, boron carbide, silicon carbide, aluminum oxide, graphite, carbon nanotubes, graphene, and nano-carbon powder. The thermally conductive material can improve the thermal conductivity and heat dissipation performance of the vibration plate 312, thereby enhancing the reliability of the sound unit's operating environment.

[0144] The present invention also proposes a vibration sound-generating module 300 (as shown in Figure 25), which includes a module shell 301 and the above-mentioned vibration sound-generating device 100. The module shell 301 has a receiving cavity 3011 and a sound outlet 3012 connected to the receiving cavity 3011. The vibration sound-generating device 100 is arranged in the receiving cavity 3011. One end of the vibration sound-generating device 100 provided with the first vibration system 2 is connected to the inner wall of the module shell, dividing the receiving cavity 3011 into a front sound cavity and a rear sound cavity. The sound outlet 3012 is connected to the front sound cavity, and the sound waves of the diaphragm assembly 31 are radiated to the outside through the front sound cavity and the sound outlet 3012. It should be noted that the sound outlet 3012 can be set in the area where the module shell 301 is facing the diaphragm assembly 31, that is, the vibration sound-generating module 300 is a positive sound-generating structure, or it can be set in a position where the module shell 301 is not facing the diaphragm assembly 31, for example, it is set on the side of the module shell 301, that is, the vibration sound-generating module 300 is a side sound-generating structure, which is not limited here. Optionally, the rear sound cavity can be provided with sound-absorbing materials, such as pasting sound-absorbing cotton or filling sound-absorbing particles, etc., and the technicians can choose according to the actual situation. The specific structure of the vibration sound-generating device 100 refers to the structure of the vibration sound-generating device 100 of the aforementioned embodiment.

[0145] Since the present vibration sound module 300 adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, which will not be described one by one here.

[0146] The present invention further provides an electronic device 200 (as shown in FIG26 ), which includes a device housing 201 and the aforementioned vibration sound-generating device 100, wherein the vibration sound-generating device 100 is disposed in the device housing 201. The specific structure of the vibration sound-generating device 100 refers to the structure of the vibration sound-generating device 100 of the aforementioned embodiment.

[0147] Optionally, when the electronic device 200 is worn by the user, the second direction is perpendicular to the user's wearing part; or, when the electronic device 200 is placed on a fixed surface, the second direction is perpendicular to the fixed surface, thereby improving the user's experience. For example, the electronic device 200 is a smartwatch, and its device housing 201 has a thickness along the second direction. When the vibration sound-generating device 100 is placed in the device housing 201, its vibration direction is along the thickness direction of the watch, that is, the user's wrist skin feels the vibration from the vertical direction, thereby improving the user experience.

[0148] Since the electronic device 200 adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, which will not be described in detail here. The above are only optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A vibration sound-generating device, characterized in that: include: A sound-generating unit, the sound-generating unit comprising a first vibration system and a magnetic circuit system, the magnetic circuit system comprising a central magnetic part and a side magnetic part, a magnetic gap being formed between the central magnetic part and the side magnetic part, the first vibration system comprising a diaphragm assembly and a voice coil driving the diaphragm assembly to vibrate, the voice coil being suspended in the magnetic gap and driving the diaphragm assembly to vibrate along a first direction; A first shell, wherein the first shell has a receiving space, and the first shell includes a top plate made of a non-magnetic material, wherein the central magnetic portion and the side magnetic portion are supported on a side of the top plate away from the receiving space; A second vibration system, the second vibration system is arranged in the accommodating space, the second vibration system includes a vibrator assembly and an elastic connecting member connecting the vibrator assembly and the first shell, the vibrator assembly includes a counterweight block and a driving coil arranged on the counterweight block, the driving coil includes two long sides arranged opposite to each other, along the first direction, the two long sides are respectively arranged opposite to the central magnetic part and the side magnetic part, and the driving coil drives the vibrator assembly to vibrate along a second direction under the drive of the magnetic circuit system, and the second direction is perpendicular to the first direction.

2. The vibration sound-generating device according to claim 1, characterized in that: In the projection along the first direction, the outer contour of the first housing does not exceed the outer contour of the sound-emitting unit; Alternatively, in the projection along the first direction, the outer contour area of ​​the first housing does not exceed 5% of the outer contour area of ​​the sound-emitting unit.

3. The vibration sound-generating device according to claim 1, characterized in that: The first housing includes the top plate and a side plate connected to the top plate, the top plate and the side plate enclose the receiving space, the top plate and the side plate are integrally formed or separately formed, and the top plate and the side plate are both made of non-magnetic material; or The first shell includes a bottom plate, a top plate, and a side plate connecting the top plate and the bottom plate, the bottom plate, the top plate, and the side plates enclose the accommodation space, the top plate and the side plates are integrally formed or separately formed, the bottom plate, the top plate, and the side plates are all made of non-magnetic materials, or the top plate and the side plates are all made of non-magnetic materials, and the bottom plate is made of magnetic material.

4. The vibration sound-generating device according to claim 1, characterized in that: The magnetic circuit system includes a central magnetic portion and side magnetic portions spaced apart at both sides of the central magnetic portion along the second direction, and the magnetic gap is formed between the central magnetic portion and the side magnetic portions.

5. The vibration sound-generating device according to claim 4, characterized in that: The central magnetic part and the side magnetic part are both magnetized along the first direction, the magnetization directions of the central magnetic part and the side magnetic part are opposite, and the magnetization directions of the two side magnetic parts are the same; And / or, the driving coils include two, the two driving coils are arranged along the second direction, each of the driving coils includes two long sides arranged opposite to each other, and along the first direction, the two long sides are respectively arranged opposite to the central magnetic part and the side magnetic part.

6. The vibration sound-generating device according to claim 1, characterized in that: There are two elastic connectors, which are respectively arranged on both sides of the vibrator assembly along the second direction, and the elastic connector includes connecting parts at both ends and a deformable part in the middle, one connecting part is fixed to the vibrator assembly, and the other connecting part is fixed to the first housing, and the deformable part extends from one connecting part to the other connecting part; And / or, the first shell is made of metal, the counterweight is made of metal, the elastic connector is made of metal, and the elastic connector and the counterweight are fixed by welding or the elastic connector and the first shell are fixed by welding.

7. The vibration sound-generating device according to claim 1, characterized in that: The sound generating unit further comprises a second housing fixedly connected to the magnetic circuit system, the second housing comprises an annular frame located on a side of the magnetic circuit system away from the first housing, and the diaphragm assembly is combined with the second housing; And / or, the diaphragm assembly and the second housing are integrally formed by injection molding or hot pressing.

8. The vibration sound-generating device according to claim 1, characterized in that: The diaphragm assembly is provided with an air hole, and the air hole is covered with a waterproof and breathable member.

9. The vibration sound-generating device according to claim 8, characterized in that: The air holes are arranged in the middle area and / or the edge area of ​​the diaphragm assembly; And / or, the air vent is one or the air vent is a plurality of array micropores; And / or, the waterproof breathable member is a waterproof breathable membrane made of ePTFE (expanded polytetrafluoroethylene) material or PTFE (polytetrafluoroethylene) material, or the waterproof breathable member is a waterproof breathable net; And / or, a hydrophobic layer and / or an oleophobic layer is provided on the waterproof breathable member.

10. The vibration sound-generating device according to claim 1, characterized in that: The diaphragm assembly includes a diaphragm and a vibration plate, wherein the vibration plate is arranged at the center of the diaphragm. The diaphragm is a porous structure layer, and / or the vibration plate is a porous structure layer.

11. The vibration sound-generating device according to claim 10, characterized in that: The diaphragm is a material layer with a porous structure made of any one of polyimide, polyester fiber, polyamide, polytetrafluoroethylene, polycarbonate, polyethylene, and polyvinylidene fluoride; And / or, the vibration plate is an organic aerogel layer, and the organic aerogel layer is a material layer with a porous structure made of any one of polyamides, polyimides, polyesters, polyurethanes, aldehydes, polyolefins, polysaccharides and silicones.

12. The vibration sound-generating device according to any one of claims 1 to 11, characterized in that: The vibration sound-generating device has a width along a second direction and a length along a third direction, the second direction and the third direction are perpendicular to each other and perpendicular to the first direction, and the length is ≥1.3*the width.

13. The vibration sound-generating device according to any one of claims 1 to 11, characterized in that: When the vibration sound-generating device is worn by a user, the second direction is perpendicular to the wearing part of the user; Alternatively, when the vibration sound-generating device is placed on a fixed tabletop, the second direction is perpendicular to the fixed tabletop.

14. A vibration sound module, characterized in that: The vibration sound-generating module comprises a module shell and a vibration sound-generating device as described in any one of claims 1 to 13, wherein the vibration sound-generating device is disposed in the module shell, and one end of the vibration sound-generating device provided with the first vibration system is connected to the inner wall of the module shell.

15. An electronic device, characterized in that: The electronic device comprises a device housing and a vibration sound-generating device as claimed in any one of claims 1 to 13 arranged in the device housing.

16. The electronic device according to claim 15, characterized in that: The second direction is the thickness direction of the electronic device; When the electronic device is worn by a user, the second direction is perpendicular to the wearing part of the user; Alternatively, when the electronic device is placed on a fixed table, the second direction is perpendicular to the fixed table.

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