Sound production device, sound production module and electronic equipment

Abstract

The invention discloses a sound production device, a sound production module and electronic equipment, and relates to the technical field of electroacoustic transduction, the sound production device comprises a first sound production monomer and a second sound production monomer which are arranged side by side along a first direction, and at least one vibration plate in the first sound production monomer and the second sound production monomer comprises a first plate part and a second plate part which are separately arranged; the first plate part and the second plate part are located in different horizontal planes in the second direction, and at least one vibration system in the first sound production single body and the second sound production single body further comprises a waterproof film. The waterproof film comprises a first connecting part connected with the first plate part, a second connecting part connected with the inner circumferential wall of the voice coil in an attached mode and a third connecting part connected with the second plate part, and the central magnetic parts of the first sound production single body and the second sound production single body comprise a first central magnet and a second central magnet which are located on the two opposite sides of the second plate part; the first center magnet and the second center magnet are magnetized in the second direction, and the magnetizing directions are opposite. According to the sound production device, the BL value is improved, and distortion is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electroacoustic transducers, and particularly to a sound generating device, a sound generating module and an electronic device applying the sound generating device. Background Art

[0002] In recent years, with the further development of science and technology, the intelligent electronics field has also entered a period of rapid development. People have put forward more requirements for the development of intelligent terminal electronic products, gradually forming new trends such as high performance, miniaturization, and lightness and thinness of electronic products. As the sound generating unit of intelligent electronic products, high performance, high sound quality, lightness and thinness of speakers have gradually become the mainstream demands of consumers.

[0003] In related technologies, high-performance speakers are usually double-sided speakers, and their structures adopt a shared magnetic circuit up and down, so that the voice coil and the magnetic circuit are stacked in the Z direction, resulting in a thicker and larger-sized product. Limited by the internal space of intelligent electronic devices and the requirement of lightness and thinness, more internal space cannot be provided to improve the performance of the speaker. Therefore, there is an urgent need for a high-performance speaker suitable for thin and light electronic devices, which can not only meet the space requirements of thinness and miniaturization, but also have a dual vibration system to improve the performance of the speaker. Summary of the Invention

[0004] The main object of the present invention is to provide a sound generating device, a sound generating module and an electronic device, aiming to provide a sound generating device with a dual vibration system. The sound generating device can not only achieve a thinning design, but also effectively increase the volume of the magnet, improve the BL value of the product, make the magnetic field line distribution more uniform, and make the BLx curve flatter, thereby reducing distortion; at the same time, it can meet the space requirements of thinness and miniaturization, and has a dual vibration system, which can improve the sound generating performance and listening effect of the whole machine.

[0005] To achieve the above object, the present invention provides a sound generating device. The sound generating device includes a first sound generating element and a second sound generating element arranged side by side in a first direction. Both the first sound generating element and the second sound generating element include a vibration system and a magnetic circuit system. The two vibration systems vibrate in a second direction perpendicular to the first direction. Each vibration system includes a diaphragm assembly and a voice coil. One end of each voice coil is connected to the corresponding diaphragm assembly, and each voice coil is an annular voice coil extending in the second direction. Each diaphragm assembly includes a diaphragm and a vibrating plate. The inner peripheral edge of each diaphragm is connected to the corresponding vibrating plate. At least one vibrating plate includes a first plate portion and a second plate portion that are separately provided. The first plate portion and the second plate portion are in different horizontal planes in the second direction. The first plate portion is connected to the top of the corresponding voice coil. The second plate portion is located inside the corresponding voice coil, and the outer periphery of the second plate portion abuts against the inner peripheral wall of the corresponding voice coil. Each magnetic circuit system includes a central magnetic portion and a peripheral magnetic portion provided outside the central magnetic portion. The peripheral magnetic portion is spaced from the central magnetic portion to form a magnetic gap. One end of each voice coil away from the diaphragm assembly is suspended in the corresponding magnetic gap. Each central magnetic portion includes a first central magnet and a second central magnet that are opposite and spaced apart in the second direction. The first central magnet and the second central magnet are located on opposite sides of the corresponding second plate portion and are located inside the corresponding voice coil in the projection in the second direction. One side of the first central magnet and the second central magnet facing the corresponding diaphragm assembly is exposed in the internal cavity of the sound generating device. The first central magnet and the second central magnet are magnetized in the second direction and have opposite magnetization directions.

[0006] Wherein, at least one of the vibration systems further includes a waterproof film. The waterproof film includes a first connecting portion located at the top of the corresponding voice coil, a second connecting portion that is attached to and connected to the inner peripheral wall of the corresponding voice coil, and a third connecting portion located inside the corresponding voice coil. The first plate portion is connected to the first connecting portion, and the second plate portion is connected to the third connecting portion.

[0007] In an embodiment, both of the vibrating plates include a first plate portion and a second plate portion that are separately provided. The first plate portion and the second plate portion are in different horizontal planes in the second direction. The top of each voice coil is connected to a first plate portion. Each second plate portion is located inside a voice coil, and the outer periphery of each second plate portion abuts against the inner peripheral wall of a voice coil.

[0008] Both of the two vibration systems further include a waterproof film. Each waterproof film includes a first connecting portion located at the top of a voice coil, a second connecting portion fittingly connected to the inner peripheral wall of a voice coil, and a third connecting portion located inside a voice coil. Each first plate portion is connected to a first connecting portion, and each second plate portion is connected to a third connecting portion.

[0009] In an embodiment, each first connecting portion is clamped between a first plate portion and the top of a voice coil; or, the inner peripheral edge of each diaphragm is clamped between a first plate portion and a first connecting portion;

[0010] And / or, each second plate portion is disposed on a side of the third connecting portion facing the top of the voice coil;

[0011] And / or, the first connecting portion, the second connecting portion, and the third connecting portion of each waterproof film are of an integrally formed structure;

[0012] And / or, the extension length of each second connecting portion in the second direction is less than the extension length of a voice coil in the second direction;

[0013] And / or, the first connecting portion and the third connecting portion of each waterproof film are respectively connected to two ends of the second connecting portion in the second direction.

[0014] In an embodiment, the vibrating plate of the first sound generating element includes a separately disposed first plate portion and a second plate portion. The first plate portion and the second plate portion are in different horizontal planes in the second direction. The top of a voice coil is connected to the first plate portion. The second plate portion is located inside a voice coil, and the outer periphery of the second plate portion abuts against the inner peripheral wall of a voice coil. The vibration system of the first sound generating element further includes a waterproof film. The waterproof film includes a first connecting portion located at the top of a voice coil, a second connecting portion fittingly connected to the inner peripheral wall of a voice coil, and a third connecting portion located inside a voice coil. The first plate portion is connected to the first connecting portion, and the second plate portion is connected to the third connecting portion;

[0015] The diaphragm of the second sounding element includes a third plate portion, a fourth plate portion, and a fifth plate portion integrally provided. The third plate portion and the fourth plate portion are located on different horizontal planes along the second direction. The top of the other voice coil is connected to the third plate portion. The fourth plate portion is located inside the other voice coil, and the outer periphery of the fourth plate portion abuts against the inner peripheral wall of the other voice coil. The fifth plate portion is adhesively connected to the inner peripheral wall of the other voice coil, and both ends of the fifth plate portion along the second direction are respectively connected to the third plate portion and the fourth plate portion; wherein, the third plate portion, the fifth plate portion, and the fourth plate portion are of an integrally formed structure.

[0016] In an embodiment, the extension length of the fifth plate portion along the second direction is less than the extension length of the voice coil along the second direction;

[0017] And / or, the outer periphery of the third plate portion is recessed and bent towards the voice coil to form a first stepped portion, and the inner peripheral edge of the diaphragm is supported and lapped on the first stepped portion;

[0018] And / or, the distance from the side of the fourth plate portion facing the first central magnet to the first central magnet is the same as the distance from the side of the fourth plate portion facing the second central magnet to the second central magnet.

[0019] In an embodiment, the outer periphery of the first plate portion is recessed and bent towards the voice coil to form a second stepped portion, and the inner peripheral edge of the diaphragm is supported and lapped on the second stepped portion;

[0020] And / or, along the second direction, the distance from the side of the second plate portion facing the first central magnet to the first central magnet is the same as the distance from the side of the second plate portion facing the second central magnet to the second central magnet.

[0021] In an embodiment, each magnetic circuit system further includes a first magnetic yoke and a second magnetic yoke arranged oppositely. One side of each first central magnet facing away from the diaphragm assembly is connected to one first magnetic yoke, and one side of each second central magnet facing away from the diaphragm assembly and one side magnetic portion are both connected to the second magnetic yoke.

[0022] In an embodiment, the outer periphery of each first magnetic yoke is bent and extended towards the second magnetic yoke to form a first welding portion, and the first welding portion is welded to the outer periphery of the second magnetic yoke;

[0023] And / or, the outer periphery of each second magnetic yoke is bent and extended towards the first magnetic yoke to form a second welding portion, and the second welding portion is welded to the outer periphery of the first magnetic yoke;

[0024] And / or, the two first magnetic yokes are of an integrally formed structure and are arranged along the first direction;

[0025] And / or, the two second magnetic yokes are of an integrally formed structure and are arranged along the first direction.

[0026] In one embodiment, the first sound generating monomer and the second sound generating monomer also each include a housing, each housing is respectively connected to the corresponding first magnetic yoke and second magnetic yoke, and is located between the corresponding first magnetic yoke and second magnetic yoke. Each first magnetic yoke at least includes a top plate portion on the side of the corresponding diaphragm assembly facing away from the second magnetic yoke. Each first central magnet is disposed on the corresponding top plate portion. The outer peripheral edge of each diaphragm is connected to one end of the corresponding housing away from the second magnetic yoke, and each diaphragm is opposite to and spaced from the corresponding top plate portion.

[0027] In one embodiment, each first magnetic yoke further includes a side plate portion disposed at an angle to the top plate portion. The side plate portion is bent toward the side of the corresponding diaphragm assembly to form a support platform. The outer peripheral edge of each diaphragm is clamped between the corresponding housing and the corresponding support platform;

[0028] And / or, each housing is a plastic housing, and each housing and the corresponding first magnetic yoke are integrally injection molded;

[0029] And / or, the two housings are of an integrally formed structure and are arranged along the first direction;

[0030] And / or, each side magnetic portion includes a side magnet and a side magnetic conductive plate arranged in a stacked manner. Each side magnet is connected to the corresponding second magnetic yoke, and each side magnetic conductive plate is connected to the corresponding housing; wherein, each side magnetic conductive plate and the corresponding housing are of an integrally formed structure.

[0031] In one embodiment, a first cavity is formed between each first magnetic yoke and the corresponding diaphragm assembly. Each first central magnet is located in the corresponding first cavity. The first sound generating monomer and the second sound generating monomer are also each provided with a sound outlet hole communicating the two first cavities;

[0032] Wherein, the two sound outlet holes are respectively provided on the corresponding housing;

[0033] Or, each first magnetic yoke includes a top plate portion and a side plate portion arranged at an angle. The two sound outlet holes are respectively provided on the corresponding top plate portion and are opposite to the corresponding diaphragm; or, the two sound outlet holes are respectively provided on the corresponding side plate portions; or, one sound outlet hole is provided on the corresponding top plate portion and the other sound outlet hole is provided on the corresponding side plate portion;

[0034] Alternatively, the two sound outlets are respectively disposed at the connection between the corresponding outer housing and the corresponding first yoke.

[0035] In one embodiment, each side magnetic portion includes a side magnet and a side magnetic conductive plate stacked thereon. Each side magnet is located outside the corresponding second central magnet and is spaced apart from the corresponding second central magnet to form a magnetic gap. Wherein, the projection of each side magnetic conductive plate in the first direction is located between the top and the bottom of the corresponding voice coil; and / or, the projection of each side magnetic conductive plate in the first direction is located between the surfaces of the corresponding first central magnet and the corresponding second central magnet facing the diaphragm assembly; and / or, the thickness of each side magnet in the second direction is greater than the thickness of each second central magnet in the second direction;

[0036] And / or, the two central magnetic portions are arranged at intervals in the first direction, and the two central magnetic portions share one side magnetic portion;

[0037] And / or, the two diaphragms are of an integrally formed structure and are arranged in the first direction.

[0038] In one embodiment, the two diaphragm assemblies jointly radiate sound waves outward on the same side of the sound generating device;

[0039] And / or, the two diaphragm assemblies simultaneously radiate sound waves of the same phase outward; or, the two diaphragm assemblies simultaneously radiate sound waves of opposite phases outward.

[0040] The present invention further provides a sound generating module, which includes:

[0041] A module housing provided with an accommodation cavity; and

[0042] The above-mentioned sound generating device is disposed in the accommodation cavity and divides the accommodation cavity into a front cavity and a rear cavity;

[0043] Wherein, the module housing is provided with a sound outlet communicating with the front cavity.

[0044] In one embodiment, the sound outlet is disposed opposite to both diaphragm assemblies of the sound generating device, so that the sound generating module has a front sound output structure;

[0045] Alternatively, the module housing is provided with two of the sound outlets; wherein, the two sound outlets are both arranged on the same side of the module housing, and each sound outlet is disposed opposite to a diaphragm assembly of the sound generating device, so that the sound generating module has a front sound output structure; or, the two sound outlets are both arranged on the same side of the module housing, and the two sound outlets are both located on one side of the sound generating device, so that the sound generating module has a side sound output structure; or, the two sound outlets are respectively arranged on different sides of the module housing, one sound outlet is disposed opposite to a diaphragm assembly of the sound generating device, and the other sound outlet is located on one side of the sound generating device.

[0046] The present invention further provides an electronic device, which includes the above-mentioned sound generating module;

[0047] Or, the electronic device includes the above-mentioned sound generating device.

[0048] The sound - generating device of the technical solution of the present invention is provided with a first sound - generating monomer and a second sound - generating monomer arranged side by side along a first direction. Both the first sound - generating monomer and the second sound - generating monomer are set as a magnetic - circuit system and a vibration system. Each magnetic - circuit system is set as a central magnetic part and a side magnetic part arranged outside the central magnetic part, so that each side magnetic part is spaced from the corresponding central magnetic part to form a magnetic gap. Each vibration system is set as a diaphragm assembly and a voice coil, so that one end of each voice coil is connected to the corresponding diaphragm assembly, and the other end of each voice coil is arranged corresponding to the corresponding magnetic gap. Thus, when current is passed into the voice coils of the first sound - generating monomer and the second sound - generating monomer, the two voice coils respectively make reciprocating motions in the magnetic fields formed by the two magnetic - circuit systems, and drive the two diaphragm assemblies to vibrate along a second direction perpendicular to the first direction, and then push the air to generate sound. Therefore, the sound - generating device simultaneously has a dual - vibration system, improving the sound - generating performance and listening effect of the whole machine, and reducing the thickness of the sound - generating device in the Z - direction, so that the sound - generating device can meet the spatial requirements of being thin, light, and miniaturized. At the same time, the central magnetic parts of the magnetic - circuit systems of the first sound - generating monomer and the second sound - generating monomer are both set as a first central magnet and a second central magnet that are opposite and spaced from each other along the second direction. The inner peripheral edge of the diaphragm of each diaphragm assembly is connected to the corresponding vibration plate, and at least one vibration plate in the first sound - generating monomer and the second sound - generating monomer is set as a first plate part and a second plate part that are separately arranged, so that the first plate part and the second plate part are in different horizontal planes along the second direction. The first plate part is connected to the top of the corresponding voice coil, the second plate part is located inside the corresponding voice coil, and the outer periphery of the second plate part abuts against the inner peripheral wall of the corresponding voice coil. In this way, the first central magnet and the second central magnet are located on opposite sides of the corresponding second plate part, and their projections along the second direction are located inside the corresponding voice coil. The sides of the first central magnet and the second central magnet facing the corresponding diaphragm assembly are both exposed in the internal cavity of the sound - generating device, and the first central magnet and the second central magnet are both magnetized along the second direction and the magnetization directions are opposite. Thus, the magnetic - field intensity in the area where the voice coil is located is increased by using the first central magnet and the second central magnet, so as to increase the magnetic force received by the voice coil. Even when the voice coil moves to the side far from the magnetic gap, under the action of the first central magnet and the second central magnet, the magnetic force received by the voice coil will be increased, thereby increasing the volume and improving the sound quality, and thus improving the sound - generating performance and listening effect of the sound - generating device;Moreover, by using the first plate portion and the second plate portion of the vibrating plate located at different horizontal levels in the second direction, and the projections of the first central magnet and the second central magnet in the second direction are located inside the voice coil. Thus, during the movement of the diaphragm assembly, the cooperation between the voice coil and the second plate portion is respectively used to provide accommodation spaces for the first central magnet and the second central magnet, so that the first central magnet and the second central magnet can be closer to the voice coil, achieving a magnetic field enhancement effect. In this way, it can effectively solve the problem that during the reciprocating movement of the voice coil, the magnetic force is insufficient when the voice coil is far from the magnetic gap, which affects the acoustic performance. The first central magnet and the second central magnet cancel the structure of the conventional central washer. Not only can a thinner design be achieved, making the magnetic field line distribution more uniform and the BLx curve flatter, thereby reducing distortion; moreover, under the condition of the same volume requirement, since the structure of the central washer is not provided, the volumes of the first central magnet and the second central magnet can be made larger, thus improving the BL value of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0050] Figure 1 Schematic diagram of the structure of an embodiment of the sound generating device provided by the present invention;

[0051] Figure 2 Schematic diagram of the structure of another perspective of an embodiment of the sound generating device provided by the present invention;

[0052] Figure 3 Exploded view of an embodiment of the sound generating device provided by the present invention;

[0053] Figure 4 Cross-sectional view of an embodiment of the sound generating device provided by the present invention;

[0054] Figure 5 Cross-sectional view of another perspective of an embodiment of the sound generating device provided by the present invention;

[0055] Figure 6 For Figure 5 Enlarged view of part A in

[0056] Figure 7 Partial cross-sectional enlarged view of the first sound generating unit in an embodiment of the sound generating device provided by the present invention;

[0057] Figure 8Partial enlarged cross-sectional view of the second sound-emitting monomer in an embodiment of the sound-emitting device provided by the present invention;

[0058] Figure 9 Exploded view of the diaphragm and the waterproof film in an embodiment of the sound-emitting device provided by the present invention;

[0059] Figure 10 Exploded view of the diaphragm and the waterproof film in another embodiment of the sound-emitting device provided by the present invention;

[0060] Figure 11 Structural diagram of the diaphragm of the second sound-emitting monomer in an embodiment of the sound-emitting device provided by the present invention;

[0061] Figure 12 Cross-sectional view of the diaphragm of the second sound-emitting monomer in an embodiment of the sound-emitting device provided by the present invention;

[0062] Figure 13 Structural diagram of the first magnetic yoke in the first embodiment of the sound-emitting device provided by the present invention;

[0063] Figure 14 Structural diagram of the first magnetic yoke in the second embodiment of the sound-emitting device provided by the present invention;

[0064] Figure 15 Structural diagram of the first magnetic yoke in the third embodiment of the sound-emitting device provided by the present invention;

[0065] Figure 16 Structural diagram of the first embodiment of the sound-emitting module provided by the present invention;

[0066] Figure 17 Structural diagram of the second embodiment of the sound-emitting module provided by the present invention;

[0067] Figure 18 Cross-sectional view of the second embodiment of the sound-emitting module provided by the present invention;

[0068] Figure 19 Structural diagram of the third embodiment of the sound-emitting module provided by the present invention;

[0069] Figure 20 Schematic diagram of the simulation effect of an embodiment of the sound-emitting device provided by the present invention.

[0070] Explanation of the reference numerals in the drawings:

[0071] 100, Sound generating device; 101, First sound generating monomer; 102, Second sound generating monomer; 1, Housing; 11, First cavity; 2, Vibration system; 21, Diaphragm assembly; 211, Diaphragm; 212, Vibration plate; 2121, First plate portion; 2122, Second step portion; 2123, Second plate portion; 2124, Third plate portion; 2125, Fourth plate portion; 2126, Fifth plate portion; 2127, First step portion; 2128, Accommodating groove; 22, Voice coil; 23, Waterproof film; 231, First connecting portion; 232, Second connecting portion; 233, Third connecting portion; 3, Magnetic circuit system; 31, First yoke; 311, Top plate portion; 312, Side plate portion; 313, Support platform; 314, Sound outlet; 315, First welding portion; 32, Second yoke; 33, Central magnetic portion; 331, First central magnet; 332, Second central magnet; 34, Edge magnetic portion; 341, Edge magnet; 342, Edge magnetic conductive plate; 35, Magnetic gap; 400, Module housing; 410, Sound outlet; 420, Rear cavity; 500, Sound generating module.

[0072] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0073] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

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

[0075] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously.

[0076] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0077] The present invention provides a sound generating device 100. It can be understood that the sound generating device 100 is applied to an electronic device, and the electronic device may be a mobile phone, an earphone, a smart wearable device, etc., which is not limited herein.

[0078] Please refer to Figures 1 to 15As shown, in the embodiment of the present invention, the sound generating device 100 includes a first sound generating element 101 and a second sound generating element 102 arranged side by side in a first direction. Both the first sound generating element 101 and the second sound generating element 102 include a vibration system 2 and a magnetic circuit system 3. The two vibration systems 2 vibrate in a second direction perpendicular to the first direction. Each vibration system 2 includes a diaphragm assembly 21 and a voice coil 22. One end of each voice coil 22 is connected to the corresponding diaphragm assembly 21, and each voice coil 22 is an annular voice coil and extends in the second direction. Each diaphragm assembly 21 includes a diaphragm 211 and a vibration plate 212. The inner peripheral edge of each diaphragm 211 is connected to the corresponding vibration plate 212. At least one vibration plate 212 includes a first plate portion 2121 and a second plate portion 2123 that are separately arranged. The first plate portion 2121 and the second plate portion 2123 are in different horizontal planes in the second direction. The first plate portion 2121 is connected to the top of the corresponding voice coil 22. The second plate portion 2123 is located inside the corresponding voice coil 22, and the outer periphery of the second plate portion 2123 abuts against the inner peripheral wall of the corresponding voice coil 22. Each magnetic circuit system 3 includes a central magnetic portion 33 and a side magnetic portion 34 provided outside the central magnetic portion 33. The side magnetic portion 34 is spaced from the central magnetic portion 33 to form a magnetic gap 35. One end of each voice coil 22 away from the diaphragm assembly 21 is suspended in the corresponding magnetic gap 35. Each central magnetic portion 33 includes a first central magnet 331 and a second central magnet 332 that are opposite and spaced apart in the second direction. The first central magnet 331 and the second central magnet 332 are located on opposite sides of the corresponding second plate portion 2123, and their projections in the second direction are located inside the corresponding voice coil 22. The sides of the first central magnet 331 and the second central magnet 332 facing the corresponding diaphragm assembly 21 are both exposed in the internal cavity of the sound generating device 100. The first central magnet 331 and the second central magnet 332 are both magnetized in the second direction and the magnetization directions are opposite. Wherein, at least one vibration system 2 further includes a waterproof film 23. The waterproof film 23 includes a first connecting portion 231 located at the top of the corresponding voice coil 22, a second connecting portion 232 that is adhesively connected to the inner peripheral wall of the corresponding voice coil 22, and a third connecting portion 233 located inside the corresponding voice coil 22. The first plate portion 2121 is connected to the first connecting portion 231, and the second plate portion 2123 is connected to the third connecting portion 233.

[0079] In this embodiment, the sound generating device 100 can be a micro speaker. It can be understood that the first sound generating element 101 and the second sound generating element 102 of the sound generating device 100 are arranged side by side in the first direction. The first sound generating element 101 and the second sound generating element 102 of the sound generating device 100 can be connected and fixed through a housing or a bracket or a frame, or the first sound generating element 101 and the second sound generating element 102 of the sound generating device 100 can be installed in the module housing as a split structure in the first direction, which is not limited herein.

[0080] It can be understood that each of the first sound - generating monomer 101 and the second sound - generating monomer 102 of the sound - generating device 100 can be a monomer structure of a sound - generating device, which is not limited herein. Both the first sound - generating monomer 101 and the second sound - generating monomer 102 include a magnetic circuit system 3 and a vibration system 2. The voice coil 22 of each vibration system 2 is correspondingly arranged with the magnetic gap 35 of the corresponding magnetic circuit system 3. Thus, when an electric current is passed through each voice coil 22, each voice coil 22 makes a reciprocating motion in the magnetic field formed by each magnetic circuit system 3, and drives each diaphragm assembly 21 to vibrate along the second direction, thereby pushing the air to generate sound. That is, the diaphragm assemblies 21 of the first sound - generating monomer 101 and the second sound - generating monomer 102 both vibrate along the second direction, so that the sound - generating device 100 has a double - vibration system 2 at the same time, improving the sound - generating performance and listening effect of the whole machine. And the first sound - generating monomer 101 and the second sound - generating monomer 102 are arranged side by side along the first direction, forming two vibration systems 2 arranged side by side along the first direction, effectively reducing the thickness of the sound - generating device 100 in the Z - direction, so that the sound - generating device 100 can meet the spatial requirements of being thin, light, and miniaturized.

[0081] In this embodiment, the magnetic circuit systems 3 and the vibration systems 2 of the first sound - generating monomer 101 and the second sound - generating monomer 102 in the sound - generating device 100 are arranged oppositely. The magnetic circuit system 3 and the vibration system 2 can be installed and fixed through the housing 1, that is, the magnetic circuit system 3 and the vibration system 2 are fixed on the housing 1, making the first sound - generating monomer 101 or the second sound - generating monomer 102 an independent component, which is not limited herein. Of course, in other embodiments, the outer periphery of the diaphragm 211 in the vibration system 2 can be directly fixed to the magnetic circuit system 3; or, the magnetic circuit system 3 and the vibration system 2 can be a split structure, which is not limited herein.

[0082] It should be noted that the two magnetic circuit systems 3 and the two vibration systems 2 of the first sound - generating monomer 101 and the second sound - generating monomer 102 can be installed and fixed through a housing 1, making the first sound - generating monomer 101 and the second sound - generating monomer 102 integrated into an integral structure, which is not limited herein.

[0083] Optionally, the outer contour of the first sound - generating monomer 101 and the second sound - generating monomer 102 can be circular or square, so that the outer contours of the housing 1, the magnetic circuit system 3, and the vibration system 2 are correspondingly set to be circular or square, which is specifically designed according to actual needs and is not limited herein. In this embodiment, the housing 1 can be selected as a frame or a framework structure, that is, the housing 1 has a cavity with two open ends. The magnetic circuit system 3 is connected to the housing 1, and the vibration system 2 is connected to the housing 1 and is opposite and spaced from the magnetic circuit system 3. The housing 1 can be a steel - sheet structure or a plastic structure, which is not limited herein.

[0084] Optionally, the housing 1 can be an integral structure or formed by two split structures cooperating with each other, which is not limited herein. It can be understood that the housing 1 is provided with conductive terminals, and the voice coil 22 is electrically connected to the conductive terminals. In this way, it is convenient for the first sound generating unit 101 and the second sound generating unit 102 to connect and conduct the two voice coils 22 to an external circuit through the conductive terminals.

[0085] In this embodiment, the magnetic circuit systems 3 of the first sound generating unit 101 and the second sound generating unit 102 both have a magnetic gap 35, that is, each magnetic circuit system 3 includes a central magnetic part 33 and a side magnetic part 34, such that the side magnetic part 34 is disposed outside the central magnetic part 33 and spaced from the central magnetic part 33 to form a magnetic gap 35. By setting each central magnetic part 33 as two central magnets that are opposite and spaced along the second direction, the two central magnets are located on opposite sides of the corresponding second plate part 2123. Specifically, the two central magnets include a first central magnet 331 and a second central magnet 332. The first central magnet 331 is close to the top of the voice coil 22, and the second central magnet 332 is close to the bottom of the voice coil 22. It should be noted that the top of the voice coil 22 is the end where the voice coil 22 is connected to the first plate part 2121, and the bottom of the voice coil 22 is the end where the voice coil 22 is suspended in the magnetic gap 35.

[0086] It can be understood that the vibration systems 2 of the first sound - generating monomer 101 and the second sound - generating monomer 102 both include a diaphragm assembly 21 and a voice coil 22. One end of each voice coil 22 is connected to the corresponding diaphragm assembly 21, and the other end of each voice coil 22 is correspondingly arranged with a magnetic gap 35. Each voice coil 22 is set as an annular voice coil and extends along the second direction. Each diaphragm assembly 21 includes a diaphragm 211 and a vibrating plate 212. The inner peripheral edge of each diaphragm 211 is connected to the corresponding vibrating plate 212. In this way, the first central magnet 331 and the second central magnet 332 of the first sound - generating monomer 101 and the second sound - generating monomer 102 are both located on opposite sides of the vibrating plate 212, and the sides of the first central magnet 331 and the second central magnet 332 facing the diaphragm assembly 21 are both exposed to the internal cavity of the sound - generating device 100. The first central magnet 331 and the second central magnet 332 are both magnetized along the second direction and the magnetization directions are opposite. In this way, after passing current through the two voice coils 22, each voice coil 22 drives a vibrating plate 212 to vibrate between the first central magnet 331 and the second central magnet 332, thereby using the first central magnet 331 and the second central magnet 332 to increase the magnetic field strength in the area where the voice coil 22 is located. With such a setting, compared with the magnetic circuit structure of a conventional speaker, the central magnetic part 33 of the present invention cancels the central washer (or central magnetic guide plate) structure, thereby reducing the thickness of the first sound - generating monomer 101 in the Z - direction. Moreover, the first central magnet 331 and the second central magnet 332 are opposite to each other along the second direction and the magnetization directions are opposite, forming an opposing magnetic structure. The magnetic force lines generated by the first central magnet 331 and the second central magnet 332 repel each other and are all transmitted to the outside of the voice coil 22. As a result, the distribution of magnetic force lines is more uniform, and the voice coil 22 can be in a dense magnetic induction line area when vibrating reciprocally along the second direction. Thus, the BLx curve becomes flatter, thereby reducing distortion, as Figure 20 shown; and, on the premise that the thickness of the sound - generating device is certain, the central magnetic part 33 of the present invention cancels the central washer (or central magnetic guide plate) structure. In this way, the cooperation of the first central magnet 331 and the second central magnet 332 can effectively increase the volume of the central magnetic part 33 and improve the BL value.

[0087] Meanwhile, by setting at least one diaphragm 212 of the first sound - generating monomer 101 and the second sound - generating monomer 102 as a first plate portion 2121 and a second plate portion 2123 which are separately arranged, the first plate portion 2121 and the second plate portion 2123 are located in different horizontal planes along the second direction, and the first plate portion 2121 is connected to the top of the corresponding voice coil 22. The second plate portion 2123 is located inside the corresponding voice coil 22, and the outer periphery of the second plate portion 2123 is abutted against the inner peripheral wall of the corresponding voice coil 22. At least one waterproof film 23 is provided and is set as a first connecting portion 231 located at the top of the corresponding voice coil 22, a second connecting portion 232 which is adhesively connected to the inner peripheral wall of the corresponding voice coil 22, and a third connecting portion 233 located inside the corresponding voice coil 22. In this way, the first plate portion 2121 is connected to the first connecting portion 231, and the second plate portion 2123 is connected to the third connecting portion 233, so that the waterproof film 23 can be used to connect to the first plate portion 2121 and the second plate portion 2123 of the diaphragm 212, and the waterproof and sealing performance can be improved. The first central magnet 331 and the second central magnet 332 of the central magnetic portion 33 in the first sound - generating monomer 101 and the second sound - generating monomer 102 are located on opposite sides of the corresponding second plate portion 2123, and their projections along the second direction are located inside the corresponding voice coil 22. The sides of the first central magnet 331 and the second central magnet 332 facing the corresponding diaphragm assembly 21 are both exposed to the internal cavity of the sound - generating device 100. When the voice coil 22 drives the diaphragm assembly 21 to vibrate, the second plate portion 2123 vibrates between the first central magnet 331 and the second central magnet 332. At this time, the voice coil 22 and the second plate portion 2123 cooperate to accommodate the first central magnet 331 and the second central magnet 332, and when the voice coil 22 approaches the first central magnet 331, it is affected by the magnetic field of the first central magnet 331, and when the voice coil 22 approaches the second central magnet 332, it is affected by the magnetic field of the second central magnet 332. In this way, the magnetic field strength in the area where the voice coil 22 is located can be increased, so as to increase the magnetic force received by the voice coil 22. Even when the voice coil 22 moves to the side away from the magnetic gap 35, under the action of the first central magnet 331 and the second central magnet 332, the magnetic force received by the voice coil 22 will be increased, thereby increasing the volume, improving the sound quality, and improving the acoustic performance of the first sound - generating monomer 101.

[0088] Optionally, the voice coil 22 is an annular voice coil and extends along the second direction. In this way, at least one diaphragm 212 is provided with a first plate portion 2121 and a second plate portion 2123 located on different horizontal planes along the second direction, such that the top of the voice coil 22 is connected to the first plate portion 2121, that is, the voice coil 22 is fixed by the first plate portion 2121. The second plate portion 2123 is located inside the voice coil 22, and the outer periphery of the second plate portion 2123 abuts against the inner peripheral wall of the voice coil 22. The first plate portion 2121 and the second plate portion 2123 on different horizontal planes can center the vibration of the voice coil 22. At the same time, during the vibration of the voice coil 22, a receiving space is provided for the first central magnet 331 by the cooperation of the voice coil 22 and the second plate portion 2123, ensuring the normal operation of the first sound generating unit 101.

[0089] The sound generating device 100 of the present invention is provided with a first sound generating monomer 101 and a second sound generating monomer 102 arranged side by side in a first direction. Both the first sound generating monomer 101 and the second sound generating monomer 102 are set as a magnetic circuit system 3 and a vibration system 2. Each magnetic circuit system 3 is set as a central magnetic part 33 and a side magnetic part 34 arranged outside the central magnetic part 33, so that each side magnetic part 34 is spaced from the corresponding central magnetic part 33 to form a magnetic gap 35. Each vibration system 2 is set as a diaphragm assembly 21 and a voice coil 22, so that one end of each voice coil 22 is connected to the corresponding diaphragm assembly 21, and the other end of each voice coil 22 is arranged corresponding to the corresponding magnetic gap 35. Thus, when current is passed into the voice coils 22 of the first sound generating monomer 101 and the second sound generating monomer 102, the two voice coils 22 respectively make reciprocating motions in the magnetic fields formed by the two magnetic circuit systems 3, and drive the two diaphragm assemblies 21 to vibrate in a second direction perpendicular to the first direction, and then push the air to generate sound, so that the sound generating device 100 simultaneously has a dual vibration system 2, improving the sound generating performance and listening effect of the whole machine, and reducing the thickness of the sound generating device 100 in the Z direction, so that the sound generating device 100 can meet the spatial requirements of being thin, light, and miniaturized. At the same time, the central magnetic parts 33 of the magnetic circuit systems 3 of the first sound generating monomer 101 and the second sound generating monomer 102 are both set as a first central magnet 331 and a second central magnet 332 that are opposite and spaced from each other in the second direction. The inner periphery of the diaphragm 211 of each diaphragm assembly 21 is connected to the corresponding vibration plate 212, and at least one vibration plate 212 of the first sound generating monomer 101 and the second sound generating monomer 102 is set as a first plate part 2121 and a second plate part 2123 that are separately arranged, so that the first plate part 2121 and the second plate part 2123 are in different horizontal planes in the second direction, and the first plate part 2121 is connected to the top of the corresponding voice coil 22, the second plate part 2123 is located inside the corresponding voice coil 22, and the outer periphery of the second plate part 2123 abuts against the inner peripheral wall of the corresponding voice coil 22. Thus, the first central magnet 331 and the second central magnet 332 are located on opposite sides of the corresponding second plate part 2123, and the projection in the second direction is located inside the corresponding voice coil 22. One sides of the first central magnet 331 and the second central magnet 332 facing the corresponding diaphragm assemblies 21 are both exposed in the internal cavity of the sound generating device 100, and the first central magnet 331 and the second central magnet 332 are both magnetized in the second direction and the magnetization directions are opposite, so as to use the first central magnet 331 and the second central magnet 332 to increase the magnetic field strength in the area where the voice coil 22 is located, thereby increasing the magnetic force received by the voice coil 22. Even when the voice coil 22 moves to the side away from the magnetic gap 35, under the action of the first central magnet 331 and the second central magnet 332, the magnetic force received by the voice coil 22 will be increased, thereby increasing the volume and improving the sound quality, and thus improving the sound generating performance and listening effect of the sound generating device 100;Moreover, by using the first plate portion 2121 and the second plate portion 2123 of the vibrating plate 212 that are located at different horizontal levels in the second direction, and the projections of the first central magnet 331 and the second central magnet 332 in the second direction are located inside the voice coil 22. Thus, during the movement of the diaphragm assembly 21, the cooperation between the voice coil 22 and the second plate portion 2123 respectively provides accommodation spaces for the first central magnet 331 and the second central magnet 332, so that the first central magnet 331 and the second central magnet 332 can be closer to the voice coil 22, achieving a magnetic field enhancement effect. In this way, it can effectively solve the problem that when the voice coil 22 reciprocates, the magnetic force is insufficient when the voice coil 22 is away from the magnetic gap 35, which affects the acoustic performance. The first central magnet 331 and the second central magnet 332 cancel the structure of the conventional central washer. Not only can it achieve a thinning design, making the magnetic field line distribution more uniform and the BLx curve flatter, thereby reducing distortion; moreover, under the condition of the same volume requirement, since the structure of the central washer is not provided, the volumes of the first central magnet 331 and the second central magnet 332 can be made larger, so as to improve the BL value of the product.

[0090] In an embodiment, both of the two vibrating plates 212 include a separately arranged first plate portion 2121 and a second plate portion 2123. The first plate portion 2121 and the second plate portion 2123 are located in different horizontal planes in the second direction. The top of each voice coil 22 is connected to a first plate portion 2121. Each second plate portion 2123 is located inside a voice coil 22, and the outer periphery of each second plate portion 2123 is in abutting contact with the inner peripheral wall of a voice coil 22. The two vibrating systems 2 also each include a waterproof film 23. Each waterproof film 23 includes a first connecting portion 231 located at the top of a voice coil 22, a second connecting portion 232 that is adhesively connected to the inner peripheral wall of a voice coil 22, and a third connecting portion 233 located inside a voice coil 22. Each first plate portion 2121 is connected to a first connecting portion 231, and each second plate portion 2123 is connected to a third connecting portion 233.

[0091] In this embodiment, the diaphragm 212 of the first sound emitting monomer 101 and the second sound emitting monomer 102 are both set as a first plate portion 2121 and a second plate portion 2123 which are separately arranged. And waterproof membranes 23 are arranged on both the first sound emitting monomer 101 and the second sound emitting monomer 102, so that each waterproof membrane 23 corresponds to a diaphragm 212. Thus, the first plate portion 2121 and the second plate portion 2123 of each diaphragm 212 are located in different horizontal planes along the second direction. And by connecting the first plate portion 2121 of each diaphragm 212 to the top of the corresponding voice coil 22, the second plate portion 2123 is located inside the corresponding voice coil 22, and the outer periphery of the second plate portion 2123 abuts against the inner peripheral wall of the corresponding voice coil 22. Each waterproof membrane 23 is set as a first connecting portion 231 located on the top of the corresponding voice coil 22, a second connecting portion 232 which is attached and connected to the inner peripheral wall of the corresponding voice coil 22, and a third connecting portion 233 located inside the corresponding voice coil 22. In this way, by connecting the first plate portion 2121 to the first connecting portion 231 and the second plate portion 2123 to the third connecting portion 233, the waterproof membrane 23 can be used to connect to both the first plate portion 2121 and the second plate portion 2123 of the diaphragm 212, and the waterproof and sealing performance can be improved at the same time.

[0092] Meanwhile, the first central magnet 331 and the second central magnet 332 of the central magnetic portion 33 in both the first sound emitting monomer 101 and the second sound emitting monomer 102 are both set to be located on opposite sides of the corresponding second plate portion 2123, and the projection along the second direction is located inside the corresponding voice coil 22. The sides of the first central magnet 331 and the second central magnet 332 facing the corresponding diaphragm assembly 21 are both exposed in the internal cavity of the sound emitting device 100. Thus, when the voice coil 22 drives the diaphragm assembly 21 to vibrate, the second plate portion 2123 vibrates between the first central magnet 331 and the second central magnet 332. At this time, each voice coil 22 cooperates with the corresponding second plate portion 2123 to accommodate the first central magnet 331 and the second central magnet 332, and when the voice coil 22 approaches the first central magnet 331, it is affected by the magnetic field of the first central magnet 331, and when the voice coil 22 approaches the second central magnet 332, it is affected by the magnetic field of the second central magnet 332. In this way, the magnetic field intensity in the area where the voice coil 22 is located can be increased, so as to increase the magnetic force received by the voice coil 22. Even when the voice coil 22 moves to the side far from the magnetic gap 35, under the action of the first central magnet 331 and the second central magnet 332, the magnetic force received by the voice coil 22 will be increased, thereby increasing the volume, improving the sound quality, and improving the acoustic performance of the first sound emitting monomer 101.

[0093] In this embodiment, as Figures 3 to 7 、 Figure 9 、 Figure 10As shown, both the first sound generating unit 101 and the second sound generating unit 102 are configured by setting the diaphragm 212 as a split structure, simultaneously providing corresponding waterproof membranes 23, and each waterproof membrane 23 is provided with a first connecting portion 231, a second connecting portion 232, and a third connecting portion 233, such that the second connecting portion 232 of the waterproof membrane 23 is adhesively connected to the inner peripheral wall of the voice coil 22, and the first connecting portion 231 is connected to the first plate portion 2121, and the third connecting portion 233 is connected to the second plate portion 2123. In this way, not only can the connection and fixation between the first plate portion 2121 and the second plate portion 2123 be achieved, but also the connection stability and strength between the diaphragm 212 and the voice coil 22 can be further improved by the cooperation of the waterproof membrane 23 and the diaphragm 212, enhancing the waterproof and sealing effect.

[0094] Optionally, the first connecting portion 231, the second connecting portion 232, and the third connecting portion 233 of each waterproof membrane 23 are of an integrally formed structure. It can be understood that this can not only improve the structural strength of the waterproof membrane 23, but also improve the waterproof sealing property.

[0095] In this embodiment, the second connecting portion 232 and the third connecting portion 233 of the waterproof membrane 23 are optionally arranged perpendicularly, such that the second connecting portion 232 and the third connecting portion 233 enclose a receiving groove 2128, and the first connecting portion 231 extends in a direction away from the receiving groove 2128. A central magnet corresponds to the receiving groove 2128, that is, the first central magnet 331 corresponds to the receiving groove 2128. Thus, when the voice coil 22 moves in the second direction and approaches the first central magnet 331, the receiving groove 2128 provides a receiving space for the first central magnet 331. Optionally, the first connecting portion 231 and the third connecting portion 233 of each waterproof membrane 23 are respectively connected to both ends of the second connecting portion 232 in the second direction.

[0096] It can be understood that in order to prevent the second plate portion 2123 from colliding and interfering with the two central magnets (i.e., the first central magnet 331 and the second central magnet 332) when vibrating between the two central magnets during the vibration of the voice coil 22, optionally, the extending length of the second connecting portion 232 of each waterproof membrane 23 in the second direction is less than the extending length of a voice coil 22 in the second direction.

[0097] In this embodiment, the top of the voice coil 22 can be fixed to the first plate portion 2121 or the first connecting portion 231 of the waterproof film 23, that is, the top of the voice coil 22 is connected to the first plate portion 2121, and the first connecting portion 231 is connected to the side of the first plate portion 2121 facing away from the voice coil 22, that is, each first plate portion 2121 is clamped between the top of a voice coil 22 and a first connecting portion 231; or, the top of the voice coil 22 is connected to the first connecting portion 231, and the first plate portion 2121 is connected to the side of the first connecting portion 231 facing away from the voice coil 22, that is, each first connecting portion 231 is clamped between a first plate portion 2121 and the top of a voice coil 22, which is not limited herein.

[0098] Of course, in other embodiments, the inner peripheral edge of the diaphragm 211 can be connected to the first plate portion 2121 or the first connecting portion 231 of the waterproof film 23. When the first plate portion 2121 is clamped between the top of the voice coil 22 and the first connecting portion 231, the inner peripheral edge of each diaphragm 211 is connected to the side of a first connecting portion 231 facing away from the first plate portion 2121; or, when the first connecting portion 231 is clamped between the first plate portion 2121 and the top of the voice coil 22, the inner peripheral edge of each diaphragm 211 is connected to the side of a first plate portion 2121 facing away from the first connecting portion 231; or, the inner peripheral edge of each diaphragm 211 is clamped between a first plate portion 2121 and a first connecting portion 231, which is not limited herein.

[0099] It can be understood that the second plate portion 2123 is connected to the third connecting portion 233 and is located on any side of the third connecting portion 233, which can strengthen the structure of the waterproof film 23. Optionally, each second plate portion 2123 is disposed on the side of a third connecting portion 233 facing the top of the voice coil 22, that is, each second plate portion 2123 is disposed on the side of a third connecting portion 233 facing the top of the voice coil 22.

[0100] It should be noted that the accommodation groove 2128 not only provides an accommodation space for the first central magnet 331, but also can prevent vibration from propagating along the surface of the diaphragm 211, thereby improving the acoustic performance of the first sound generating unit 101.

[0101] In an embodiment, the diaphragm 212 of the first sound emitting unit 101 includes a first plate portion 2121 and a second plate portion 2123 that are separately arranged. The first plate portion 2121 and the second plate portion 2123 are located in different horizontal planes along the second direction. The top of a voice coil 22 is connected to the first plate portion 2121. The second plate portion 2123 is located inside the voice coil 22, and the outer periphery of the second plate portion 2123 abuts against the inner peripheral wall of the voice coil 22. The vibration system 2 of the first sound emitting unit 101 further includes a waterproof film 23. The waterproof film 23 includes a first connecting portion 231 located at the top of the voice coil 22, a second connecting portion 232 that is adhesively connected to the inner peripheral wall of the voice coil 22, and a third connecting portion 233 located inside the voice coil 22. The first plate portion 2121 is connected to the first connecting portion 231, and the second plate portion 2123 is connected to the third connecting portion 233. The diaphragm 212 of the second sound emitting unit 102 includes a third plate portion 2124, a fourth plate portion 2125, and a fifth plate portion 2126 that are integrally arranged. The third plate portion 2124 and the fourth plate portion 2125 are located in different horizontal planes along the second direction. The top of the other voice coil 22 is connected to the third plate portion 2124. The fourth plate portion 2125 is located inside the other voice coil 22, and the outer periphery of the fourth plate portion 2125 abuts against the inner peripheral wall of the other voice coil 22. The fifth plate portion 2126 is adhesively connected to the inner peripheral wall of the other voice coil 22, and both ends of the fifth plate portion 2126 along the second direction are respectively connected to the third plate portion 2124 and the fourth plate portion 2125. Among them, the third plate portion 2124, the fifth plate portion 2126, and the fourth plate portion 2125 are an integrally formed structure.

[0102] In this embodiment, as Figure 7 , Figure 9 and Figure 10 shown, by setting the diaphragm 212 of the first sound emitting unit 101 as the separately arranged first plate portion 2121 and second plate portion 2123, and arranging the waterproof film 23 in the first sound emitting unit 101, and setting the waterproof film 23 as the first connecting portion 231, the second connecting portion 232, and the third connecting portion 233, the second connecting portion 232 of the waterproof film 23 is adhesively connected to the inner peripheral wall of the voice coil 22, and the first connecting portion 231 is connected to the first plate portion 2121, and the third connecting portion 233 is connected to the second plate portion 2123. In this way, not only can the connection and fixation of the first plate portion 2121 and the second plate portion 2123 be realized, but also the connection stability and strength between the diaphragm 212 and the voice coil 22 can be further improved by the cooperation of the waterproof film 23 and the diaphragm 212, and the waterproof and sealing effect can be enhanced.

[0103] At the same time, as Figure 8 , Figure 11 and Figure 12As shown, the diaphragm 212 of the second sound emitting monomer 102 is provided with a third plate portion 2124, a fourth plate portion 2125, and a fifth plate portion 2126 that are integrally provided. That is, the third plate portion 2124, the fifth plate portion 2126, and the fourth plate portion 2125 of the diaphragm 212 are of an integrally formed structure. In this way, both the structural strength of the diaphragm 212 and the sealing performance can be improved. Optionally, the third plate portion 2124, the fifth plate portion 2126, and the fourth plate portion 2125 of the diaphragm 212 can be integrally formed by stamping.

[0104] It can be understood that the fifth plate portion 2126 extends along the second direction, and the fifth plate portion 2126 is located inside the voice coil 22 and is in fitting connection with the inner peripheral wall of the voice coil 22, so that the third plate portion 2124 and the fourth plate portion 2125 of the diaphragm 212 are connected to both ends of the fifth plate portion 2126 along the second direction. This can not only realize the connection and fixation of the third plate portion 2124 and the fourth plate portion 2125, but also further improve the connection stability and strength between the diaphragm 212 and the voice coil 22 by using the third plate portion 2124 and the fifth plate portion 2126.

[0105] In this embodiment, the fifth plate portion 2126 of the diaphragm 212 and the fourth plate portion 2125 are optionally perpendicularly arranged, so that the fifth plate portion 2126 and the fourth plate portion 2125 enclose to form a receiving groove 2128. The third plate portion 2124 extends in a direction away from the receiving groove 2128. A central magnet corresponds to the receiving groove 2128, that is, the first central magnet 331 corresponds to the receiving groove 2128. Thus, when the voice coil 22 moves along the second direction and approaches the first central magnet 331, the receiving groove 2128 provides a receiving space for the first central magnet 331.

[0106] It can be understood that in order to prevent the fourth plate portion 2125 from colliding and interfering with the two central magnets (that is, the first central magnet 331 and the second central magnet 332) when vibrating between the two central magnets during the vibration of the voice coil 22, optionally, the extension length of the fifth plate portion 2126 along the second direction is less than the extension length of the voice coil 22 along the second direction.

[0107] In one embodiment, as Figure 8 , Figure 11 , Figure 12 shown, the outer periphery of the third plate portion 2124 is recessed and bent towards the voice coil 22 to form a first step portion 2127. The inner peripheral edge of the diaphragm 211 is supported and lapped on the first step portion 2127.

[0108] In this embodiment, by recessing and bending the outer periphery of the third plate portion 2124 of the second sound emitting monomer 102 to form a first step portion 2127, the inner peripheral edge of the diaphragm 211 is fixed by using the first step portion 2127, and positioning and limiting of the inner peripheral edge of the diaphragm 211 are achieved. At the same time, when the inner peripheral edge of the diaphragm 211 supports and overlaps on the first step portion 2127, the inner peripheral edge of the diaphragm 211 is optionally flush with the third plate portion 2124, so that the matching structure of the third plate portion 2124 and the diaphragm 211 is more compact, and the occupied vibration space is reduced.

[0109] It can be understood that the first step portion 2127 is formed by recessing and bending the outer periphery of the third plate portion 2124 toward the voice coil 22, so that a limiting groove is formed between the first step portion 2127 and the inner peripheral edge of the third plate portion 2124, and the top of the voice coil 22 is limited and installed in cooperation with the fifth plate portion 2126, thereby further improving the connection stability of the voice coil 22.

[0110] In one embodiment, the distance from the side of the fourth plate portion 2125 facing the first central magnet 331 to the first central magnet 331 is the same as the distance from the side of the fourth plate portion 2125 facing the second central magnet 332 to the second central magnet 332.

[0111] In this embodiment, as Figure 8 shown, the fourth plate portion 2125 of the second sound emitting monomer 102 has a first surface on the side facing the first central magnet 331 and a second surface on the side facing the second central magnet 332. Optionally, the distance from the first surface to the first central magnet 331 is the same as the distance from the second surface to the second central magnet 332. In this way, when the voice coil 22 drives the fourth plate portion 2125 to vibrate in the second direction, it can effectively prevent the fourth plate portion 2125 from colliding and interfering with the first central magnet 331 and the second central magnet 332. Optionally, the projection of the fourth plate portion 2125 in the first direction is located in the middle of the voice coil 22.

[0112] In one embodiment, as Figure 7 、 Figure 10 shown, the outer periphery of the first plate portion 2121 is recessed and bent toward the voice coil 22 to form a second step portion 2122, and the inner peripheral edge of the diaphragm 211 supports and overlaps on the second step portion 2122.

[0113] In this embodiment, by recessing and bending the outer periphery of the first plate portion 2121 to form the second stepped portion 2122, the inner peripheral edge of the diaphragm 211 is fixed by using the second stepped portion 2122, and positioning and limiting of the inner peripheral edge of the diaphragm 211 are achieved. At the same time, when the inner peripheral edge of the diaphragm 211 supports and overlaps on the second stepped portion 2122, the inner peripheral edge of the diaphragm 211 is optionally flush with the first plate portion 2121. In this way, the matching structure of the first plate portion 2121 and the diaphragm 211 can be made more compact, reducing the occupied vibration space.

[0114] It can be understood that the second stepped portion 2122 is formed by recessing and bending the outer periphery of the first plate portion 2121 toward the voice coil 22. In this way, a limiting groove is formed between the second stepped portion 2122 and the inner peripheral edge of the first plate portion 2121, and the top of the voice coil 22 is limited and installed in cooperation with the second connecting portion 232, thereby further improving the connection stability of the voice coil 22.

[0115] It should be noted that when the vibrating plates 212 of the first sound generating unit 101 and the second sound generating unit 102 are both provided as the first plate portion 2121 and the second plate portion 2123 which are separately arranged, the first plate portion 2121 can be the first plate portion 2121 of the first sound generating unit 101 and / or the second sound generating unit 102. Of course, when the vibrating plate 212 of the first sound generating unit 101 is provided as the first plate portion 2121 and the second plate portion 2123 which are separately arranged, and the vibrating plate 212 of the second sound generating unit 102 is provided as the third plate portion 2124, the fourth plate portion 2125 and the fifth plate portion 2126 which are integrally arranged, the first plate portion 2121 is only the first plate portion 2121 of the first sound generating unit 101, and this is not limited herein.

[0116] In an embodiment, along the second direction, the distance from the side of the second plate portion 2123 facing the first central magnet 331 to the first central magnet 331 is the same as the distance from the side of the second plate portion 2123 facing the second central magnet 332 to the second central magnet 332.

[0117] In this embodiment, as Figures 4 to 7 shown, the second plate portion 2123 has a first surface on the side facing the first central magnet 331 and a second surface on the side facing the second central magnet 332. Optionally, the distance from the first surface to the first central magnet 331 is the same as the distance from the second surface to the second central magnet 332. In this way, when the voice coil 22 drives the second plate portion 2123 to vibrate along the second direction, it can effectively avoid collision interference between the second plate portion 2123 and the first central magnet 331 and the second central magnet 332. Optionally, the projection of the second plate portion 2123 in the first direction is located in the middle of the voice coil 22.

[0118] It should be noted that when the diaphragm 212 of the first sound - generating monomer 101 and the second sound - generating monomer 102 are both provided as the first plate portion 2121 and the second plate portion 2123 which are separately arranged, the second plate portion 2123 can be the second plate portion 2123 of the first sound - generating monomer 101 and / or the second sound - generating monomer 102. Of course, when the diaphragm 212 of the first sound - generating monomer 101 is provided as the first plate portion 2121 and the second plate portion 2123 which are separately arranged, and the diaphragm 212 of the second sound - generating monomer 102 is provided as the third plate portion 2124, the fourth plate portion 2125 and the fifth plate portion 2126 which are integrally arranged, the second plate portion 2123 is only the second plate portion 2123 of the first sound - generating monomer 101, and this is not limited herein.

[0119] It should be noted that the vibration system 2 of the first sound - generating monomer 101 and the second sound - generating monomer 102 further includes a centering washer. One end of the centering washer is connected to the voice coil 22, and the other end of the centering washer is connected to the housing or the magnetic circuit system 3, so as to further center the voice coil 22 by using the centering washer and avoid polarization or swing of the voice coil 22 during vibration.

[0120] In an embodiment, each magnetic circuit system 3 further includes a first magnetic yoke 31 and a second magnetic yoke 32 which are oppositely arranged. One side of each first central magnet 331 facing away from the diaphragm assembly 21 is connected to a first magnetic yoke 31, and one side of each second central magnet 332 facing away from the diaphragm assembly 21 and a side magnetic portion 34 are both connected to the second magnetic yoke 32.

[0121] In this embodiment, as Figures 1 to 8 、 Figures 13 to 15 shown, by arranging the first magnetic yoke 31 and the second magnetic yoke 32 in each magnetic circuit system 3, the first magnetic yoke 31 and the second magnetic yoke 32 are oppositely arranged. In this way, the first magnetic yoke 31 and the second magnetic yoke 32 can be used to respectively mount and fix the two central magnets, and at the same time, the magnetic field lines of the two central magnets are concentrated to form a magnetic circuit.

[0122] It can be understood that one side of the first central magnet 331 facing away from the diaphragm assembly 21 is connected to the first magnetic yoke 31, and one side of the second central magnet 332 facing away from the diaphragm assembly 21 is connected to the second magnetic yoke 32. Optionally, the projected area of the first magnetic yoke 31 in the second direction is greater than or equal to the projected area of the first central magnet 331 in the second direction, and the projected area of the second magnetic yoke 32 in the second direction is greater than or equal to the projected area of the second central magnet 332 in the second direction. In this way, not only the first central magnet 331 and the second central magnet 332 are mounted and fixed, but also a magnetic - concentrating effect is achieved. In this embodiment, the first magnetic yoke 31 and the second magnetic yoke 32 can be made of a magnetic - conducting plate structure.

[0123] In one embodiment, each first magnetic yoke 31 is provided with a first recessed groove corresponding to each first central magnet 331, and each first central magnet 331 is disposed in a first recessed groove. It can be understood that by setting in this way, the first recessed groove can be used to position and install the first central magnet 331, improving the installation stability. Moreover, the assembly height between the first central magnet 331 and the first magnetic yoke 31 can be reduced, increasing the vibration space of the diaphragm assembly 21.

[0124] In this embodiment, the first recessed groove may be formed by the side of the first magnetic yoke 31 facing the first central magnet 331. At this time, the side of the first magnetic yoke 31 facing away from the first central magnet 331 is flat; or, the first recessed groove may be formed by the first magnetic yoke 31 bending toward the side away from the first central magnet 331. At this time, the side of the first magnetic yoke 31 facing away from the first central magnet 331 is convexly provided at the position corresponding to the first recessed groove, and no limitation is made here.

[0125] In one embodiment, each second magnetic yoke 32 is provided with a second recessed groove corresponding to each second central magnet 332, and each second central magnet 332 is disposed in a second recessed groove. It can be understood that by setting in this way, the second recessed groove can be used to position and install the second central magnet 332, improving the installation stability. Moreover, the assembly height between the first central magnet 331 and the first magnetic yoke 31 can be reduced, increasing the vibration space of the diaphragm assembly 21.

[0126] In this embodiment, the second recessed groove may be formed by the side of the second magnetic yoke 32 facing the second central magnet 332. At this time, the side of the second magnetic yoke 32 facing away from the second central magnet 332 is flat; or, the second recessed groove may be formed by the second magnetic yoke 32 bending toward the side away from the second central magnet 332. At this time, the side of the second magnetic yoke 32 facing away from the second central magnet 332 is convexly provided at the position corresponding to the second recessed groove, and no limitation is made here.

[0127] In one embodiment, each magnetic circuit system 3 further includes a side magnetic part 34 disposed on a second magnetic yoke 32. The side magnetic part 34 is located outside a second central magnet 332 and is spaced from the corresponding second central magnet 332 to form a magnetic gap 35.

[0128] In this embodiment, as Figures 3 to 8 shown, by disposing the side magnetic part 34 on the second magnetic yoke 32 and located outside the second central magnet 332, the side magnetic part 34 is spaced from the second central magnet 332 to form the magnetic gap 35. In this way, the magnetic field strength in the magnetic gap 35 can be effectively ensured.

[0129] It can be understood that the side magnetic parts 34 of the first sound generating monomer 101 and the second sound generating monomer 102 not only form a magnetic circuit with the second central magnet 332 through the second magnetic yoke 32, so that the magnetic force lines in the magnetic gap 35 pass through the voice coil 22. At the same time, the side magnetic parts 34 also form a magnetic circuit with the first central magnet 331 and the first magnetic yoke 31. When the voice coil 22 approaches the first central magnet 331, more magnetic force lines pass through the voice coil 22, thereby increasing the magnetic force received by the voice coil 22, effectively improving the BL value, making the distribution of magnetic force lines more uniform, and making the BLx curve flatter, thereby reducing distortion.

[0130] It should be noted that the side magnetic part 34 can be an integral structure. For example, the side magnetic part 34 is arranged in a ring shape and is disposed around the outside of the second central magnet 332. Of course, the side magnetic part 34 can also be a split structure. At this time, the side magnetic part 34 includes a plurality of parts, and the plurality of side magnetic parts 34 are spaced apart and disposed around the outside of the second central magnet 332, which is not limited herein.

[0131] In this embodiment, as Figures 3 to 8 shown, each side magnetic part 34 includes a side magnet 341 and a side magnetic conductive plate 342 which are stacked, and each side magnet 341 is connected to the second magnetic yoke 32. It can be understood that each side magnet 341 and each side magnetic conductive plate 342 are both located outside a second central magnet 332 and are spaced apart from the corresponding second central magnet 332 to form a magnetic gap 35.

[0132] Optionally, the structural contours of the side magnet 341 and the side magnetic conductive plate 342 of the side magnetic part 34 are similar. That is, when the side magnetic part 34 is an integral ring structure, both the side magnet 341 and the side magnetic conductive plate 342 are in an integral ring structure; or, when the side magnetic part 34 is a split structure, both the side magnet 341 and the side magnetic conductive plate 342 are split structures and correspond one by one. Of course, in other embodiments, the structures of the side magnet 341 and the side magnetic conductive plate 342 of the side magnetic part 34 can also be different. For example, one of the side magnet 341 and the side magnetic conductive plate 342 is an integral ring, and the other is a split structure, which is not limited herein.

[0133] In an implementation manner, the projection of each side magnetic conductive plate 342 in the first direction is located between the top of the corresponding voice coil 22 and the bottom of the corresponding voice coil 22.

[0134] In this embodiment, when the first sound generating element 101 and the second sound generating element 102 are not working, that is, when the voice coils 22 of the first sound generating element 101 and the second sound generating element 102 do not vibrate, the projection of each side magnetic plate 342 along the first direction is located between the top of the corresponding voice coil 22 and the bottom of the corresponding voice coil 22. In this way, it can be ensured that the voice coil 22 can reciprocally approach the first central magnet 331 or the second central magnet 332 during the vibration process, so as to ensure that the magnetic force received by the voice coil 22 when moving to the side away from the magnetic gap 35 remains unchanged or the change amount is very small, and the magnetic flux line distribution of the magnetic circuit system 3 is more uniform, and the BLx curve is flatter, thereby reducing distortion.

[0135] It should be noted that when the voice coils 22 of the first sound generating element 101 and the second sound generating element 102 are in a small amplitude situation, the projection of the side magnetic plate 342 along the first direction is located between the top of the voice coil 22 and the bottom of the voice coil 22. For the voice coil 22 in a small amplitude situation, only when the voice coil 22 does not vibrate, the projection of the side magnetic plate 342 along the first direction is located between the top of the voice coil 22 and the bottom of the voice coil 22, and no limitation is made here.

[0136] In an embodiment, the projection of each side magnetic plate 342 along the first direction is located between the surfaces of the corresponding first central magnet 331 and the corresponding second central magnet 332 facing the diaphragm assembly 21.

[0137] In this embodiment, as Figures 4 to 8 shown, by arranging the projection of the side magnetic plate 342 of the side magnetic part 34 of the first sound generating element 101 and the second sound generating element 102 along the first direction between the surfaces of the first central magnet 331 and the second central magnet 332 facing the diaphragm assembly 21, it can be ensured that the side magnetic part 34 can respectively form a magnetic circuit with the first central magnet 331 and the second central magnet 332, so that more magnetic flux lines pass through the voice coil 22, thereby increasing the magnetic field strength, effectively improving the BL value, making the magnetic flux line distribution more uniform, and making the BLx curve flatter, thereby reducing distortion.

[0138] Optionally, the thickness of each side magnet 341 along the second direction is greater than the thickness of each second central magnet 332 along the second direction. In this embodiment, by setting the thickness of the side magnet 341 along the second direction to be greater than the thickness of the second central magnet 332 along the second direction, on the one hand, it is ensured that the projection of the side magnetic plate 342 along the first direction is arranged between the surfaces of the first central magnet 331 and the second central magnet 332 facing the diaphragm assembly 21. At the same time, it should be noted that the side magnet 341 needs to cooperate with the first central magnet 331 and the second central magnet 332 respectively to form corresponding magnetic circuits, and the above setting can also ensure that the side magnet 341 forms magnetic circuits with the first central magnet 331 and the second central magnet 332 with equivalent magnetic field strengths.

[0139] Of course, in other embodiments, the second yoke 32 of the first sound emitting unit 101 and the second sound emitting unit 102 includes a bottom portion and a side portion (not shown in the figure) formed by bending and extending from the periphery of the bottom portion toward the diaphragm assembly 21. The second central magnet 332 is disposed on the bottom portion and is spaced from the side portion to form a magnetic gap 35. It can be understood that by setting the second yoke 32 to have a bottom portion and a side portion disposed at an angle, the side portion of the second yoke 32 is located outside the second central magnet 332 and is spaced from the second central magnet 332 to form the magnetic gap 35. The bottom portion and the side portion of the second yoke 32 may be an integrally formed structure, and the bottom portion and the side portion are perpendicularly disposed, which is not limited herein.

[0140] In one embodiment, a first welding portion 315 is formed by bending and extending the outer periphery of each first yoke 31 toward the second yoke 32, and the first welding portion 315 is welded to the outer periphery of the second yoke 32. It can be understood that the first sound emitting unit 101 and the second sound emitting unit 102 are welded to the second yoke 32 through the first welding portion 315 of the first yoke 31, thereby improving the connection stability. In this way, when the first sound emitting unit 101 and the second sound emitting unit 102 are applied to an electronic device and a phenomenon such as dropping occurs, the structure of the first sound emitting unit 101 can be ensured to be stable.

[0141] Optionally, there are a plurality of first welding portions 315, and the plurality of first welding portions 315 are spaced apart on the outer periphery of each first yoke 31, and the plurality of first welding portions 315 are all welded to the outer periphery of the second yoke 32, which is not limited herein.

[0142] In this embodiment, as Figures 1 to 6 、 Figures 13 to 15 shown, each first yoke 31 includes a top plate portion 311 and a side plate portion 312 disposed at an angle, and a part of the side plate portion 312 extends toward the second yoke 32 to form the first welding portion 315. Optionally, the top plate portion 311, the side plate portion 312, and the first welding portion 315 of the first yoke 31 are an integrally formed structure, which is not limited herein.

[0143] Optionally, the two first yokes 31 are an integrally formed structure and are arranged along the first direction. In this embodiment, as Figure 1 、 Figure 3 、 Figure 4 、 Figures 13 to 15 shown, the first yokes 31 of the first sound emitting unit 101 and the second sound emitting unit 102 are an integrally formed structure.

[0144] In one embodiment, the outer periphery of each second yoke 32 bends and extends towards the first yoke 31 to form a second welding portion, and the second welding portion is welded to the outer periphery of the first yoke 31. It can be understood that the first sound generating element 101 and the second sound generating element 102 are welded to the first yoke 31 through the second welding portion of the second yoke 32, thereby improving the connection stability. In this way, when the first sound generating element 101 is applied to an electronic device and phenomena such as dropping occur, the structure of the first sound generating element 101 can be ensured to be stable.

[0145] Optionally, there are multiple second welding portions, and the multiple second welding portions are spaced apart on the outer periphery of each second yoke 32, and the multiple second welding portions are all welded to the outer periphery of each first yoke 31, and no limitation is made here.

[0146] In this embodiment, each second yoke 32 includes a top wall and a side wall arranged at an angle, and a part of the side wall extends towards the first yoke 31 to form a second welding portion. Optionally, the top wall, the side wall and the second welding portion of the second yoke 32 are of an integrally formed structure, and no limitation is made here.

[0147] Optionally, the two second yokes 32 are of an integrally formed structure and are arranged along the first direction. In this embodiment, as Figures 2 to 4 shown, the second yokes 32 of the first sound generating element 101 and the second sound generating element 102 are of an integrally formed structure.

[0148] In one embodiment, the first sound generating element 101 and the second sound generating element 102 further include a housing 1, and each housing 1 is respectively connected to the corresponding first yoke 31 and second yoke 32 and is located between the corresponding first yoke 31 and second yoke 32. Each first yoke 31 at least includes a top plate portion 311 on the side of the corresponding diaphragm assembly 21 facing away from the second yoke 32. Each first central magnet 331 is disposed on the corresponding top plate portion 311. The outer periphery of each diaphragm 211 is connected to one end of the corresponding housing 1 away from the second yoke 32, and each diaphragm 211 is opposite to and spaced from the corresponding top plate portion 311.

[0149] In this embodiment, the magnetic circuit system 3 and the vibration system 2 of the first sound generating element 101 and the second sound generating element 102 are both connected to the housing 1. It can be understood that the two housings of the first sound generating element 101 and the second sound generating element 102 can be separately provided, that is, the housing of each sound generating element is independent.

[0150] Of course, in other embodiments, the two housings 1 of the first sound generating element 101 and the second sound generating element 102 are of an integrally formed structure. Optionally, the two housings 1 are of an integrally formed structure and are arranged along the first direction.

[0151] In this embodiment, as Figures 1 to 6As shown, the first sound - generating monomer 101 and the second sound - generating monomer 102 are arranged by setting the housing 1, so as to install and fix the magnetic circuit system 3 and the vibration system 2 by using the housing 1. It can be understood that the housing 1 is located between the first yoke 31 and the second yoke 32 along the second direction. The first yoke 31 is connected to the housing 1, and the second yoke 32 can be connected to the housing 1 directly or indirectly, which is not limited herein.

[0152] It can be understood that each first yoke 31 at least includes a top - plate part 311 located on the side of the diaphragm assembly 21 facing away from the second yoke 32, so as to install and fix the first central magnet 331 by using the top - plate part 311. In this way, the outer periphery of the diaphragm 211 is connected to one end of the housing 1 away from the second yoke 32, so that the diaphragm 211 is opposite to and spaced from the top - plate part 311, thus ensuring the vibration of the diaphragm 211.

[0153] In this embodiment, the first yoke 31 can be a flat - plate structure. At this time, the first yoke 31 forms the top - plate part 311, and the first yoke 31 and the housing 1 can be an integrally - formed structure. Optionally, each housing 1 is a plastic shell, and each housing 1 and the corresponding first yoke 31 are integrally injection - molded. Of course, in other embodiments, the first yoke 31 and the housing 1 can also be connected by welding or bonding, which is not limited herein.

[0154] It can be understood that the housing 1 can be a frame structure or a framework with both ends open. At this time, the first yoke 31 is connected to one end of the housing 1, and the second yoke 32 is located at the end of the housing 1 away from the first yoke 31. Of course, in other embodiments, the housing 1 includes a straight part and a vertical part arranged at an angle. The straight part is provided with an installation opening, the first yoke 31 is arranged at the installation opening, and the second yoke 32 is located on the side of the vertical part of the housing 1 facing away from the straight part, which is not limited herein.

[0155] In one embodiment, each first yoke 31 further includes a side - plate part 312 arranged at an angle with the top - plate part 311. The side - plate part 312 is bent towards the side of the corresponding diaphragm assembly 21 to form a support platform 313. The outer periphery of each diaphragm 211 is clamped between the corresponding housing 1 and the corresponding support platform 313.

[0156] In this embodiment, as Figures 1 to 6 、 Figures 13 to 15 shown, by setting the first yoke 31 as a top - plate part 311 and a side - plate part 312 arranged at an angle, and arranging the support platform 313 on the side - plate part 312, the support platform 313 can be used to both position and install the housing 1, and fix the outer periphery of the diaphragm 211 by using the housing 1 and the support platform 313. Moreover, the support platform 313 can position the outer periphery of the diaphragm 211 away from the top - plate part 311, thus ensuring the vibration of the diaphragm 211.

[0157] It can be understood that the side plate portion 312 of the first yoke 31 and the housing 1 can be integrally formed. Optionally, the housing 1 is a plastic housing, and the housing 1 and the first yoke 31 are integrally injection molded. Of course, in other embodiments, the side plate portion 312 of the first yoke 31 and the housing 1 can be connected by welding or bonding, which is not limited herein.

[0158] Of course, in other embodiments, the outer peripheral edge of the diaphragm 211 can also be fixed to the inner wall of the housing 1. For example, the inner wall of the housing 1 is convexly provided with structures such as a support platform, and the outer peripheral edge of the diaphragm 211 is fixed to the support platform and the like, which is not limited herein.

[0159] In an embodiment, each side magnetic part 34 includes a side magnet 341 and a side magnetic conductive plate 342 arranged in a stacked manner. Each side magnet 341 is connected to the corresponding second yoke 32, and each side magnetic conductive plate 342 is connected to the corresponding housing 1; wherein, each side magnetic conductive plate 342 and the corresponding housing 1 are an integrally formed structure.

[0160] In this embodiment, as Figures 3 to 5 shown, the side magnetic part 34 of each magnetic circuit system 3 is arranged on the second yoke 32, and the second yoke 32 can be connected to the housing 1 through the side magnetic part 34. Optionally, the side magnetic conductive plate 342 of the side magnetic part 34 and the housing 1 can be an integrally formed structure. For example, the housing 1 is a plastic housing, and the housing 1 and the side magnetic conductive plate 342 are integrally injection molded; or, the housing 1 is a metal housing, and in this case, the housing 1 and the side magnetic conductive plate 342 are integrally drawn, which is not limited herein. Of course, in other embodiments, the housing 1 and the side magnetic conductive plate 342 can also be connected by welding or bonding, which is not limited herein.

[0161] It should be noted that the housing 1 is used not only to fix the diaphragm 211 of the magnetic circuit system 3 and the vibration system 2, but also to support the first yoke 31 and the second yoke 32 of the magnetic circuit system 3, so that the first yoke 31 and the second yoke 32 are relatively and spaced apart.

[0162] In an embodiment, a first cavity 11 is formed between each first yoke 31 and the corresponding diaphragm assembly 21. Each first central magnet 331 is located in the corresponding first cavity 11. The first sound emitting monomer 101 and the second sound emitting monomer 102 are both provided with sound outlet holes 314 communicating the two first cavities 11.

[0163] In this embodiment, as Figure 4 、 Figure 5As shown, a first cavity 11 is formed between the first yoke 31 of the first sound emitting monomer 101 and the second sound emitting monomer 102 and the diaphragm assembly 21. The first cavity 11 is used to provide a vibration space for the diaphragm 211 and at the same time provide an installation space for the first central magnet 331. It can be understood that in order to enable the diaphragm 211 to emit sound smoothly during vibration, the first sound emitting monomer 101 is also provided with a sound outlet hole 314 communicating with the first cavity 11.

[0164] It should be noted that the first cavities 11 of the first sound emitting monomer 101 and the second sound emitting monomer 102 can be optionally arranged to be isolated from each other, so as to ensure that the diaphragms 211 of the first sound emitting monomer 101 and the second sound emitting monomer 102 emit sound smoothly during vibration and avoid acoustic interference between each other.

[0165] It can be understood that the two sound outlet holes 314 are respectively arranged on the corresponding outer shell 1; or, as Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 、 Figures 13 to 15 shown, the two sound outlet holes 314 are respectively arranged on the corresponding first yokes 31; or, the two sound outlet holes 314 are respectively arranged at the connection of the corresponding outer shell 1 and the corresponding first yoke 31, which is not limited herein.

[0166] In one embodiment, each first yoke 31 includes a top plate portion 311 and a side plate portion 312 arranged at an angle. Optionally, as Figure 14 shown, the two sound outlet holes 314 are respectively arranged on the corresponding top plate portions 311 and are opposite to the corresponding diaphragms 211; or, as Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 13 shown, the two sound outlet holes 314 are respectively arranged on the corresponding side plate portions 312; or, as Figure 15 shown, one sound outlet hole 314 is arranged on the corresponding top plate portion 311 and the other sound outlet hole 314 is arranged on the corresponding side plate portion 312, which is not limited herein.

[0167] It can be understood that when the sound outlet holes 314 of the first sound generating unit 101 and the second sound generating unit 102 are both provided on the top plate portion 311 and are opposite to the diaphragm 211, when the sound generating device 100 is applied to an electronic device or a sound generating module, at this time, a sound outlet that is directly opposite to the sound outlet holes 314 of the first sound generating unit 101 and the second sound generating unit 102 is provided on the housing of the electronic device or the sound generating module, so that the electronic device or the sound generating module has a front sound output structure. Alternatively, the sound outlet on the housing of the electronic device or the sound generating module is located on one side of the sound generating device 100, so that the sound outlet is communicated with the sound outlet holes 314 of the first sound generating unit 101 and the second sound generating unit 102 through a sound outlet channel, thereby making the electronic device or the sound generating module have a side sound output structure.

[0168] Of course, in other embodiments, when the sound outlet holes 314 of the first sound generating unit 101 and the second sound generating unit 102 are provided on the side plate portion 312, when the sound generating device 100 is applied to an electronic device or a sound generating module, at this time, when the sound outlet on the housing of the electronic device or the sound generating module is directly opposite to the diaphragms 211 of the first sound generating unit 101 and the second sound generating unit 102, the sound outlet is communicated with the sound outlet holes 314 through a sound outlet channel, so that the electronic device or the sound generating module has a front sound output structure. Alternatively, the sound outlet on the housing of the electronic device or the sound generating module is located on one side of the sound generating device 100, and the sound outlet is correspondingly communicated with the sound outlet holes 314 of the first sound generating unit 101 and the second sound generating unit 102, thereby making the electronic device or the sound generating module have a side sound output structure.

[0169] Alternatively, one of the sound outlet holes 314 of the first sound generating unit 101 and the second sound generating unit 102 is provided on the corresponding top plate portion 311, and the other sound outlet hole 314 is provided on the corresponding side plate portion 312. When the sound generating device 100 is applied to an electronic device or a sound generating module, at this time, two sound outlets are provided on the housing of the electronic device or the sound generating module, and the two sound outlets are respectively directly opposite to the two sound outlet holes 314. At this time, the first sound generating unit 101 and the second sound generating unit 102 of the sound generating device 100 are one front and one side (that is, one has a front sound output structure and the other has a side sound output structure), which is not limited herein.

[0170] In one embodiment, the first central magnets 331 of the first sound generating unit 101 and the second sound generating unit 102 are close to the top of the voice coil 22, and the second central magnets 332 are close to the bottom of the voice coil 22; wherein, the magnetic energy product of each first central magnet 331 is greater than the magnetic energy product of one second central magnet 332. It can be understood that by setting like this, the magnetic field intensity of the first central magnet 331 can be ensured to be greater than the magnetic field intensity of the second central magnet 332.

[0171] In this embodiment, each side magnetic part 34 is located outside a second central magnet 332, such that the magnetic field strength within the magnetic gap 3534 formed by the cooperation of the side magnetic part 34 and the second central magnet 332 is greater than the magnetic field strength of the first central magnet 331. By setting the magnetic energy product of the first central magnet 331 to be greater than that of the second central magnet 332, the magnetic field strengths at both ends of the voice coil 22 can be balanced, the flatness of the BLx curve can be further improved, and thus the distortion can be reduced.

[0172] Optionally, the volume of the first central magnet 331 of the first sound generating unit 101 and the second sound generating unit 102 is greater than the volume of the second central magnet 332. When the grades of the first central magnet 331 and the second central magnet 332 are the same, this can ensure that the magnetic field strength of the first central magnet 331 is greater than that of the second central magnet 332. In this embodiment, as Figures 3 to 5 shown, the outer contours of the first central magnet 331 and the second central magnet 332 are the same, and the thickness of the first central magnet 331 in the second direction is greater than the thickness of the second central magnet 332 in the second direction. Thereby, the magnetic field strength of the first central magnet 331 is greater than that of the second central magnet 332.

[0173] In one embodiment, the two central magnetic parts 33 are arranged at intervals in the first direction, and the two central magnetic parts 33 share one side magnetic part 34.

[0174] In this embodiment, as Figure 3 and Figure 4 shown, the two central magnetic parts 33 of the first sound generating unit 101 and the second sound generating unit 102 are arranged at intervals in the first direction. Optionally, one side magnetic part 34 is shared between the two central magnetic parts 33.

[0175] In this embodiment, the side magnetic parts 34 of the first sound generating unit 101 and the second sound generating unit 102 are arranged outside the central magnetic parts 33. The side magnetic parts 34 can be an integral annular structure. At this time, the two side magnetic parts 34 can be selected to be an integrally formed structure and extend and arrange in the first direction. The integrally formed side magnetic part 34 is provided with a receiving space corresponding to each central magnetic part 33, and each central magnetic part 33 is located within each receiving space, which is not limited herein; or, the side magnetic parts 34 of the first sound generating unit 101 and the second sound generating unit 102 can also be separately arranged. As Figure 3 and Figure 4 shown, at this time, the parts of the two side magnetic parts 34 between the two central magnetic parts 33 are an integrally formed structure, that is, part of the side magnetic parts 34 between the two central magnetic parts 33 is shared, which is not limited herein.

[0176] In one embodiment, the two diaphragms 211 are an integrally formed structure and are arranged in the first direction. In this embodiment, as Figure 3As shown, the two diaphragms 211 of the first sound generating unit 101 and the second sound generating unit 102 can be selected to be an integrally formed structure and arranged along the first direction.

[0177] In one embodiment, the two diaphragm assemblies 21 together radiate sound waves outward on the same side of the sound generating device 100. It can be understood that the two diaphragm assemblies 21 together radiating sound waves outward on the same side of the sound generating device 100 can achieve the superposition and enhancement of sound waves, improving the loudness of the sound generating device 100.

[0178] Optionally, the two diaphragm assemblies 21 of the first sound generating unit 101 and the second sound generating unit 102 radiate sound waves of the same phase outward simultaneously. In this embodiment, the two diaphragm assemblies 21 can be selected to vibrate in the same direction. The two diaphragm assemblies 21 together radiating sound waves outward on the same side of the sound generating device 100 can achieve the superposition and enhancement of sound waves, improving the loudness.

[0179] Optionally, the two diaphragm assemblies 21 of the first sound generating unit 101 and the second sound generating unit 102 radiate sound waves of opposite phases outward simultaneously. In this embodiment, the two diaphragm assemblies 21 can be selected to vibrate in the opposite direction. In this way, the two diaphragm assemblies 21 of the first sound generating unit 101 and the second sound generating unit 102 are both in communication with the external environment, and the two diaphragm assemblies 21 radiate sound waves of opposite phases to the external environment. The two sound waves of opposite phases cancel each other out in the far field, which is applicable to environments that require far-field noise cancellation and privacy protection.

[0180] It should be noted that in the sound generating device 100, the first sound generating unit 101 and the second sound generating unit 102 form two vibration systems 2. The two vibration systems 2 of the sound generating device 100 can be independent of each other and do not affect each other. The structural design can be completely the same, thus simplifying the overall machine debugging.

[0181] As Figures 16 to 19 shown, the present invention also proposes a sound generating module 500, which includes the above-mentioned sound generating device 100. The specific structure of the sound generating device 100 refers to the foregoing embodiments. Since this electronic device adopts all the technical solutions of the foregoing all embodiments, it has at least all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be elaborated here one by one.

[0182] In one embodiment, the sound generating module 500 further includes a module housing 400. The module housing 400 is provided with a receiving cavity. The sound generating device 100 is arranged in the receiving cavity and divides the receiving cavity into a front cavity and a rear cavity 420; wherein, the module housing 400 is provided with a sound outlet 410 communicating with the front cavity.

[0183] In this embodiment, the module housing 400 can be a metal housing or a plastic housing, which is not limited herein. The module housing 400 can be an integral structure or a split structure, which is not limited herein. The module housing 400 includes an upper module housing and a lower module housing, and the upper module housing and the lower module housing are butt-connected and enclosed to form a receiving cavity. Optionally, the upper module housing and the lower module housing can be adhesively connected or welded.

[0184] Optionally, the outer contour of the module housing 400 can be a square structure. In specific applications, other suitable shapes such as a circle can be selected according to actual situations, and it is not limited to a specific shape.

[0185] In this embodiment, the sound generating device 100 is disposed in the receiving cavity and divides the receiving cavity into a front cavity and a rear cavity 420. At this time, the upper module housing corresponds to the front cavity, and the lower module housing corresponds to the rear cavity 420. It can be understood that the sound outlet 410 is disposed on the upper module housing or at the connection between the upper module housing and the lower module housing.

[0186] In one embodiment, the module housing 400 is further provided with a sound leakage hole communicating with the rear cavity 420 for adjusting the pressure in the rear cavity 420. It can be understood that the sound leakage hole is disposed on the lower module housing. Optionally, the sound leakage hole can be a round hole, an oval hole or a polygonal hole, etc., which is not limited herein. The number of sound leakage holes can be one or more, which is specifically designed according to actual applications and is not limited herein.

[0187] It can be understood that the upper module housing includes a top wall and a first side wall, and the lower module housing includes a bottom wall and a second side wall. The first side wall and the second side wall together form the side wall of the module housing 400 of the sound generating module 500, that is, the module housing 400 includes a top wall and a bottom wall disposed opposite to each other and a side wall connecting the top wall and the bottom wall. Optionally, the sound outlet 410 is disposed on the top wall or in the connection area between the side wall and the top wall, and the sound leakage hole is disposed on the side wall or the bottom wall or in the connection area between the side wall and the bottom wall. In this way, the sound generating performance of the sound generating module 500 and the technical effect of protecting privacy can be taken into account, and the most suitable design scheme can be selected according to actual needs during use. The present invention is not limited herein.

[0188] In this embodiment, as Figures 16 to 19 shown, the top wall of the upper module housing is provided with a first opening, and the bottom wall of the lower module housing is provided with a second opening. When the sound generating device 100 is installed in the module housing 400, the first yoke 31 of the sound generating device 100 corresponds to or is located at the first opening, and the second yoke 32 of the sound generating device 100 corresponds to or is located at the second opening. It can be understood that the first opening can be the sound outlet 410; or, the first opening is only used for installing the sound generating device 100 to reduce the thickness of the sound generating module 500 in the Z direction, which is not limited herein.

[0189] In one embodiment, as Figure 17 andFigure 18 As shown, the sound outlet 410 is disposed opposite to both diaphragm assemblies 21 of the sound generating device 100, so that the sound generating module 500 has a front sound output structure.

[0190] Optionally, the sound outlet 410 of the sound generating module 500 is one.

[0191] In one embodiment, the sound outlet 410 is disposed opposite to the diaphragm assemblies 21 of the first sound generating element 101 and the second sound generating element 102 of the sound generating device 100, so that the sound generating module 500 has a front sound output structure. It can be understood that the sound outlet 410 is disposed opposite and communicated with the two sound outlet holes 314 of the sound generating device 100; or, the sound outlet 410 is communicated with the two sound outlet holes 314 of the sound generating device 100 through a sound output channel, which is not limited herein.

[0192] In another embodiment, the sound outlet 410 is located on one side of the sound generating device 100, so that the sound generating module 500 has a side sound output structure, which is not limited herein. It can be understood that the sound outlet 410 of the sound generating module 500 is located on one side of the sound generating device 100, that is, the sound outlet 410 is not opposite to the two diaphragm assemblies 21 of the sound generating device 100, but is located on one side of the periphery of the two diaphragm assemblies 21. At this time, the sound generating module 500 has a side sound output structure.

[0193] Optionally, the sound outlet 410 is disposed opposite and communicated with the two sound outlet holes 314 of the sound generating device 100; or, the sound outlet 410 is communicated with the two sound outlet holes 314 of the sound generating device 100 through a sound output channel, which is not limited herein.

[0194] Optionally, the module housing 400 is provided with two sound outlets 410.

[0195] In one embodiment, the two sound outlets 410 are both disposed on the same side of the module housing 400, and each sound outlet 410 is disposed opposite to a diaphragm assembly 21 of the sound generating device 100, so that the sound generating module 500 has a front sound output structure.

[0196] In another embodiment, as Figure 16 shown, the two sound outlets 410 are both disposed on the same side of the module housing 400, and the two sound outlets 410 are both located on one side of the sound generating device 100, so that the sound generating module 500 has a side sound output structure.

[0197] In yet another embodiment, as Figure 19 shown, one sound outlet 410 is respectively disposed on different sides of the module housing 400, one sound outlet 410 is disposed opposite to a diaphragm assembly 21 of the sound generating device 100, and the other sound outlet 410 is located on one side of the sound generating device 100.

[0198] It can be understood that in this way, some of the sounding monomers of the sounding device 100 in the module housing 400 can be of the front-sounding structure, and some can be of the side-sounding structure, realizing the cooperation of the front-sounding structure + side-sounding structure, which can adapt to various assembly modes of the whole machine and improve the degree of freedom.

[0199] The present invention also provides an electronic device, which includes the above-mentioned sounding device 100. The specific structure of the sounding device 100 refers to the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, and will not be elaborated herein one by one.

[0200] The present invention also provides an electronic device, which includes the above-mentioned sounding module 500. The specific structure of the sounding module 500 refers to the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, and will not be elaborated herein one by one.

[0201] Optionally, the above-mentioned electronic device can be a mobile phone, headset, computer, PAD, smart wearable device, etc., and the present invention does not make specific limitations thereto.

[0202] The above are only the optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the description and drawings of the present invention under the concept of the present invention, or direct / indirect application in other related technical fields are all included in the patent protection scope of the present invention.

Claims

1. A sound generating device, characterized in that, The sound generating device includes a first sound generating element and a second sound generating element arranged side by side in a first direction. Both the first sound generating element and the second sound generating element include a vibration system and a magnetic circuit system. The two vibration systems vibrate in a second direction perpendicular to the first direction. Each vibration system includes a diaphragm assembly and a voice coil. One end of each voice coil is connected to the corresponding diaphragm assembly, and each voice coil is an annular voice coil and extends in the second direction. Each diaphragm assembly includes a diaphragm and a vibration plate. The inner peripheral edge of each diaphragm is connected to the corresponding vibration plate. At least one of the vibration plates includes a first plate portion and a second plate portion arranged separately. The first plate portion and the second plate portion are in different horizontal planes in the second direction. The first plate portion is connected to the top of the corresponding voice coil. The second plate portion is located inside the corresponding voice coil, and the outer periphery of the second plate portion abuts against the inner peripheral wall of the corresponding voice coil. Each magnetic circuit system includes a central magnetic portion and a side magnetic portion provided outside the central magnetic portion. The side magnetic portion and the central magnetic portion are spaced apart to form a magnetic gap. One end of each voice coil away from the diaphragm assembly is suspended in the corresponding magnetic gap. Each central magnetic portion includes a first central magnet and a second central magnet arranged opposite and spaced apart in the second direction. The first central magnet and the second central magnet are located on opposite sides of the corresponding second plate portion and are located inside the corresponding voice coil in the projection in the second direction. The sides of the first central magnet and the second central magnet facing the corresponding diaphragm assembly are both exposed in the internal cavity of the sound generating device. The first central magnet and the second central magnet are both magnetized in the second direction and the magnetization directions are opposite; Wherein, at least one of the vibration systems further includes a waterproof film. The waterproof film includes a first connecting portion located at the top of the corresponding voice coil, a second connecting portion adhesively connected to the inner peripheral wall of the corresponding voice coil, and a third connecting portion located inside the corresponding voice coil. The first plate portion is connected to the first connecting portion, and the second plate portion is connected to the third connecting portion.

2. The sound generating device according to claim 1, wherein Both of the vibration plates include a first plate portion and a second plate portion arranged separately. The first plate portion and the second plate portion are in different horizontal planes in the second direction. The top of each voice coil is connected to a first plate portion. Each second plate portion is located inside a voice coil, and the outer periphery of each second plate portion abuts against the inner peripheral wall of a voice coil; Both of the vibration systems further include a waterproof film. Each waterproof film includes a first connecting portion located at the top of a voice coil, a second connecting portion adhesively connected to the inner peripheral wall of a voice coil, and a third connecting portion located inside a voice coil. Each first plate portion is connected to a first connecting portion, and each second plate portion is connected to a third connecting portion.

3. The sound generating device according to claim 2, wherein Each first connecting portion is clamped between a first plate portion and the top of a voice coil; or, the inner peripheral edge of each diaphragm is clamped between a first plate portion and a first connecting portion; And / or, each of the second plate portions is disposed on a side of one of the third connecting portions facing the top of the voice coil; And / or, the first connecting portion, the second connecting portion, and the third connecting portion of each waterproof film are of an integrally formed structure; And / or, the extending length of each second connecting portion in the second direction is less than the extending length of one voice coil in the second direction; And / or, the first connecting portion and the third connecting portion of each waterproof film are respectively connected to two ends of the second connecting portion in the second direction.

4. The sound generating device according to claim 1, wherein The diaphragm of the first sound generating unit includes a first plate portion and a second plate portion which are separately arranged. The first plate portion and the second plate portion are located in different horizontal planes in the second direction. The top of one voice coil is connected to the first plate portion. The second plate portion is located inside one voice coil, and the outer periphery of the second plate portion abuts against the inner peripheral wall of one voice coil. The vibration system of the first sound generating unit further includes a waterproof film. The waterproof film includes a first connecting portion located at the top of one voice coil, a second connecting portion fittingly connected to the inner peripheral wall of one voice coil, and a third connecting portion located inside one voice coil. The first plate portion is connected to the first connecting portion, and the second plate portion is connected to the third connecting portion; The diaphragm of the second sound generating unit includes a third plate portion, a fourth plate portion, and a fifth plate portion which are integrally arranged. The third plate portion and the fourth plate portion are located in different horizontal planes in the second direction. The top of the other voice coil is connected to the third plate portion. The fourth plate portion is located inside the other voice coil, and the outer periphery of the fourth plate portion abuts against the inner peripheral wall of the other voice coil. The fifth plate portion is fittingly connected to the inner peripheral wall of the other voice coil, and two ends of the fifth plate portion in the second direction are respectively connected to the third plate portion and the fourth plate portion; wherein, the third plate portion, the fifth plate portion, and the fourth plate portion are of an integrally formed structure.

5. The sound generating device according to claim 4, wherein The extending length of the fifth plate portion in the second direction is less than the extending length of the voice coil in the second direction; And / or, the outer periphery of the third plate portion is recessed and bent towards the voice coil to form a first step portion, and the inner peripheral edge of the diaphragm is supported and lapped on the first step portion; And / or, the distance from the side of the fourth plate portion facing the first central magnet to the first central magnet is the same as the distance from the side of the fourth plate portion facing the second central magnet to the second central magnet.

6. The sound generating device according to claim 1, wherein The outer periphery of the first plate portion is recessed and bent towards the voice coil to form a second step portion, and the inner peripheral edge of the diaphragm is supported and lapped on the second step portion; And / or, along the second direction, the distance from the side of the second plate portion facing the first central magnet to the first central magnet is the same as the distance from the side of the second plate portion facing the second central magnet to the second central magnet.

7. The sound generating device according to claim 1, wherein, Each of the magnetic circuit systems further includes a first yoke and a second yoke which are oppositely arranged. One side of each of the first central magnets facing away from the diaphragm assembly is connected to one of the first yokes, and one side of each of the second central magnets facing away from the diaphragm assembly and one of the edge magnetic parts are both connected to the second yoke.

8. The sound generating device according to claim 7, wherein, The outer periphery of each of the first yokes bends and extends towards the second yoke to form a first welding part, and the first welding part is welded to the outer periphery of the second yoke. And / or, the outer periphery of each of the second yokes bends and extends towards the first yoke to form a second welding part, and the second welding part is welded to the outer periphery of the first yoke. And / or, the two first yokes are of an integrally formed structure and are arranged along the first direction. And / or, the two second yokes are of an integrally formed structure and are arranged along the first direction.

9. The sound generating device according to claim 7, wherein, The first sound generating unit and the second sound generating unit both further include a housing. Each housing is respectively connected to the corresponding first yoke and the second yoke and is located between the corresponding first yoke and the second yoke. Each of the first yokes at least includes a top plate portion located on the side of the corresponding diaphragm assembly facing away from the second yoke. Each of the first central magnets is disposed on the corresponding top plate portion. The outer peripheral edge of each diaphragm is connected to one end of the corresponding housing away from the second yoke, and each diaphragm is opposite to and spaced from the corresponding top plate portion.

10. The sound generating device according to claim 9, wherein Each of the first yokes further includes a side plate portion disposed at an angle to the top plate portion. The side plate portion bends towards the corresponding diaphragm assembly to form a support platform, and the outer peripheral edge of each diaphragm is clamped between the corresponding housing and the corresponding support platform. And / or, each of the housings is a plastic housing, and each housing and the corresponding first yoke are integrally injection molded. And / or, the two housings are of an integrally formed structure and are arranged along the first direction. And / or, each of the edge magnetic parts includes an edge magnet and an edge magnetic guide plate which are stacked. Each of the edge magnets is connected to the corresponding second yoke, and each of the edge magnetic guide plates is connected to the corresponding housing; wherein, each of the edge magnetic guide plates and the corresponding housing are of an integrally formed structure.

11. The sound generating device according to claim 9, wherein, A first cavity is formed between each of the first yokes and the corresponding diaphragm assembly. Each of the first central magnets is located in the corresponding first cavity. The first sound generating unit and the second sound generating unit both further are provided with sound outlet holes communicating the two first cavities. Wherein, the two sound outlet holes are respectively disposed on the corresponding housings. Or, each of the first yokes includes a top plate portion and a side plate portion disposed at an angle. The two sound outlet holes are respectively disposed on the corresponding top plate portions and are opposite to the corresponding diaphragms; or the two sound outlet holes are respectively disposed on the corresponding side plate portions; or one sound outlet hole is disposed on the corresponding top plate portion and the other sound outlet hole is disposed on the corresponding side plate portion. Or, the two sound outlet holes are respectively disposed at the connection between the corresponding housing and the corresponding first yoke.

12. The sound generating device according to claim 1, wherein, Each of the edge magnetic parts includes an edge magnet and an edge magnetic conduction plate which are stacked. Each of the edge magnets is located outside the corresponding second central magnet and is spaced apart from the corresponding second central magnet to form a magnetic gap. Wherein, the projection of each edge magnetic conduction plate along the first direction is located between the top and the bottom of the corresponding voice coil; and / or, the projection of each edge magnetic conduction plate along the first direction is located between the surfaces of the corresponding first central magnet and the corresponding second central magnet facing the diaphragm assembly; and / or, the thickness of each edge magnet along the second direction is greater than the thickness of each second central magnet along the second direction. And / or, the two central magnetic parts are arranged at intervals along the first direction, and the two central magnetic parts share one edge magnetic part. And / or, the two diaphragms are of an integrally formed structure and are arranged along the first direction.

13. The sound generating device according to claim 1, wherein, The two diaphragm assemblies jointly radiate sound waves outward on the same side of the sound generating device. And / or, the two diaphragm assemblies simultaneously radiate sound waves with the same phase; or, the two diaphragm assemblies simultaneously radiate sound waves with opposite phases.

14. A sound generating module, characterized in that, The sound generating module includes: A module housing provided with a receiving cavity; and The sound generating device according to any one of claims 1 to 13, the sound generating device is arranged in the receiving cavity and divides the receiving cavity into a front cavity and a rear cavity. Wherein, the module housing is provided with a sound outlet communicating with the front cavity.

15. The sound generating module according to claim 14, wherein The sound outlet is arranged opposite to both diaphragm assemblies of the sound generating device, so that the sound generating module has a front sound output structure. Or, the module housing is provided with two sound outlets. Wherein, the two sound outlets are both arranged on the same side of the module housing, and each sound outlet is arranged opposite to one diaphragm assembly of the sound generating device, so that the sound generating module has a front sound output structure; or, the two sound outlets are both arranged on the same side of the module housing, and the two sound outlets are both located on one side of the sound generating device, so that the sound generating module has a side sound output structure; or, the two sound outlets are respectively arranged on different sides of the module housing, one sound outlet is arranged opposite to one diaphragm assembly of the sound generating device, and the other sound outlet is located on one side of the sound generating device.

16. An electronic device, characterized in that, The electronic device includes the sound generating module according to claim 14 or 15. Or, the electronic device includes the sound generating device according to any one of claims 1 to 13.

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