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, and 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, the vibrating plates of the first sound production monomer and the second sound production monomer comprise first plate parts and second plate parts which are located on different horizontal planes in the second direction, the first plate parts are connected with the top of the voice coil and the vibrating diaphragm respectively, and the outer peripheries of the second plate parts abut against the inner peripheral wall of the voice coil; the central magnetic part of each of the first sound production single body and the second sound production single body comprises a first central magnet and a second central magnet which are positioned on two opposite sides of the second plate part; each first central magnet and each second central magnet are magnetized along a second direction and are opposite in magnetizing direction; and the magnetic energy product of the first central magnet of at least one central magnetic part is greater than that of the second central magnet. 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, lightness and thinness of electronic products. As the sound generating unit of intelligent electronic products, high performance, high sound quality, lightness and thinness of the speaker 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 for the speaker to improve its performance. 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, lightness 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, which 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 flux 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, lightness and miniaturization, and has a dual vibration system, which can improve the acoustic 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 unit and a second sound generating unit arranged side by side in a first direction, and both the first sound generating unit and the second sound generating unit include:

[0006] a vibration system, both 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, each voice coil is an annular voice coil and extends in the second direction, each diaphragm assembly includes a diaphragm and a vibration plate, each vibration plate includes a first plate portion and a second plate portion located on different horizontal planes, the first plate portion is respectively connected to the top of the corresponding voice coil and the corresponding diaphragm, 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; and

[0007] Magnetic circuit system, each of the magnetic circuit systems includes a central magnetic part and side magnetic parts arranged outside the central magnetic part, the side magnetic parts and the central magnetic part are spaced apart to form a magnetic gap, one end of each voice coil away from the first plate part is suspended in the corresponding magnetic gap, each central magnetic part includes a first central magnet and a second central magnet that are opposite and spaced apart along the second direction, the first central magnet and the second central magnet are located on opposite sides of the second plate part, and the projection along the second direction is located inside the voice coil, one side of each of the first central magnet and the second central magnet facing the diaphragm assembly is exposed in the internal cavity of the sound generating device, each of the first central magnet and each of the second central magnet are magnetized along the second direction and the magnetization directions are opposite;

[0008] Wherein, each of the first central magnets is close to the top of one of the voice coils, each of the second central magnets is close to the bottom of one of the voice coils, and the magnetic energy product of the first central magnet of at least one of the central magnetic parts is greater than the magnetic energy product of the second central magnet.

[0009] In one embodiment, each of the vibrating plates further includes a third plate part, each of the third plate parts is located inside one of the voice coils and is attached to the inner peripheral wall of one of the voice coils, and both ends of each of the third plate parts along the second direction are respectively connected to one of the first plate parts and one of the second plate parts;

[0010] Wherein, the first plate part, the third plate part and the second plate part of each of the vibrating plates are of an integrally formed structure.

[0011] In one embodiment, each of the vibrating systems further includes a waterproof film, each of the waterproof films includes a first connecting part located at the top of one of the voice coils, a second connecting part attached to the inner peripheral wall of the voice coil, and a third connecting part located inside the voice coil, each of the first plate parts is connected to the corresponding first connecting part, and each of the second plate parts is connected to the corresponding third connecting part.

[0012] In one embodiment, each of the first connecting parts is clamped between the corresponding first plate part and the top of the corresponding voice coil; or, the inner peripheral edge of each of the diaphragms is clamped between the corresponding first plate part and the corresponding first connecting part;

[0013] And / or, each of the second plate parts is arranged on one side of the corresponding third connecting part facing the top of the voice coil;

[0014] And / or, the first connecting part, the second connecting part and the third connecting part of each of the waterproof films are of an integrally formed structure;

[0015] And / or, the extension length of each of the second connecting portions along the second direction is less than the extension length of the corresponding voice coil along the second direction;

[0016] And / or, the first connecting portion and the third connecting portion of each waterproof film are respectively connected to two ends of the corresponding second connecting portion along the second direction.

[0017] In one embodiment, the outer periphery of each first plate portion is recessed and bent towards the voice coil to form a stepped portion, and the inner peripheral edge of each diaphragm is supported and lapped on the corresponding stepped portion;

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

[0019] In one embodiment, each magnetic circuit system further includes a first magnetic yoke and a second magnetic yoke which are oppositely arranged. One side of each first central magnet facing away from the diaphragm assembly is connected to the corresponding 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 corresponding second magnetic yoke.

[0020] In one 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 second magnetic yoke;

[0021] 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 first magnetic yoke.

[0022] In one embodiment, both the first sound generating monomer and the second sound generating monomer further include a housing. Each housing is respectively connected to the corresponding first magnetic yoke and the corresponding second magnetic yoke, and is located between the corresponding first magnetic yoke and the corresponding second magnetic yoke. Each first magnetic yoke at least includes a top plate portion located on one side of a 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.

[0023] 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 towards the 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;

[0024] And / or, each of the outer shells is a plastic shell, and each of the outer shells and the corresponding first yoke are integrally injection-molded;

[0025] And / or, the two outer shells are of an integrally formed structure and are arranged along the first direction;

[0026] And / or, each side magnetic part includes a side magnet and a side magnetic conductive plate which are stacked, each side magnet is connected to the corresponding second yoke, and each side magnetic conductive plate is connected to the corresponding outer shell; wherein, each side magnetic conductive plate and the corresponding outer shell are of an integrally formed structure.

[0027] In one embodiment, a first cavity is formed between each first yoke and the corresponding diaphragm assembly, each first central magnet is located in the corresponding first cavity, and the first sound generating element and the second sound generating element are both provided with sound outlet holes communicating with the corresponding first cavity;

[0028] Wherein, the two sound outlet holes are respectively arranged on the corresponding outer shells;

[0029] Or, each first yoke includes a top plate portion and a side plate portion arranged at an angle, the two sound outlet holes are respectively arranged on the corresponding top plate portions and face the corresponding diaphragms; or, the two sound outlet holes are respectively arranged on the corresponding side plate portions; or, one sound outlet hole is arranged on the corresponding top plate portion and the other sound outlet hole is arranged on the corresponding side plate portion;

[0030] Or, the two sound outlet holes are respectively arranged at the connection between the corresponding outer shell and the corresponding first yoke.

[0031] In one embodiment, each side magnetic part includes a side magnet and a side magnetic conductive plate which are stacked, each side magnet is located outside the corresponding second central magnet and is spaced from the corresponding second central magnet to form the magnetic gap; wherein, the projection of each side magnetic conductive plate along 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 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 side magnet along the second direction is greater than the thickness of the corresponding second central magnet along the second direction;

[0032] And / or, the side magnetic part includes a shared side magnetic part, the shared side magnetic part is located between the two central magnetic parts, and the shared side magnetic part cooperates with the two central magnetic parts respectively to form the corresponding magnetic gaps.

[0033] In one embodiment, the two diaphragm assemblies jointly radiate sound waves outward on the same side of the sound generating device;

[0034] And / or, the two diaphragm assemblies simultaneously radiate sound waves with the same phase outward; or, the two diaphragm assemblies simultaneously radiate sound waves with opposite phases outward.

[0035] The present invention also provides a sound generating module, which includes:

[0036] A module housing, which is provided with an accommodation cavity; and

[0037] The above-mentioned sound generating device, which is arranged in the accommodation cavity and divides the accommodation cavity into a front cavity and a rear cavity;

[0038] Wherein, the module housing is provided with a sound outlet communicating with the front cavity.

[0039] In one embodiment, 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;

[0040] 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 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 arranged 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.

[0041] The present invention also provides an electronic device, which includes the above-mentioned sound generating module;

[0042] Or, the electronic device includes the above-mentioned sound generating device.

[0043] 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 in a first direction. Both the first sound generating monomer and the second sound generating monomer are provided with a magnetic circuit system and a vibration system. Each magnetic circuit system is provided with a central magnetic part and side magnetic parts 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 provided with 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 in a second direction perpendicular to the first direction, thereby pushing the air to generate sound. As a result, the sound generating device simultaneously has a dual vibration system, improving the acoustic 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 provided with a first central magnet and a second central magnet that are opposite and spaced from each other in the second direction. The inner peripheral edge of the diaphragm of each diaphragm assembly is connected to the corresponding vibration plate. The vibration plates in the first sound generating monomer and the second sound generating monomer are provided with a first plate part and a second plate part located on different horizontal planes in the second direction, so that each 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 in 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 in the second direction and the magnetization directions are opposite. The magnetic energy product of the first central magnet of at least one central magnetic part is greater than that of the second central magnet. Thus, the magnetic field strength in the area where the voice coil is located is increased by using the first central magnet and the second central magnet, thereby increasing 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 acoustic 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, thereby affecting the acoustic performance. Moreover, the first central magnet and the second central magnet cancel the structure of the conventional central washer. Not only can a thinning design be achieved, making the magnetic field line distribution more uniform and the BLx curve flatter, thereby reducing distortion; but also, 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, thereby improving the BL value of the product. Description of the Drawings

[0044] 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 also be obtained based on the structures shown in these drawings.

[0045] Figure 1 Schematic diagram of the structure of an embodiment of the sound generating device provided by the present invention;

[0046] Figure 2 Schematic diagram of the structure of an embodiment of the sound generating device provided by the present invention from another perspective;

[0047] Figure 3 Exploded view of an embodiment of the sound generating device provided by the present invention;

[0048] Figure 4 Cross-sectional view of an embodiment of the sound generating device provided by the present invention;

[0049] Figure 5 Cross-sectional view of an embodiment of the sound generating device provided by the present invention from another perspective;

[0050] Figure 6 For Figure 5 Enlarged view of area A in

[0051] Figure 7 Partial cross-sectional enlarged view of an embodiment of the sound generating device provided by the present invention;

[0052] Figure 8 Partial cross-sectional enlarged view of another embodiment of the sound generating device provided by the present invention;

[0053] Figure 9 Schematic exploded view of the diaphragm and the waterproof film in an embodiment of the sound generating device provided by the present invention;

[0054] Figure 10 Schematic exploded view of the diaphragm and the waterproof film in another embodiment of the sound generating device provided by the present invention;

[0055] Figure 11 Schematic structural view of the diaphragm in an embodiment of the sound generating device provided by the present invention;

[0056] Figure 12 Schematic cross-sectional view of the diaphragm in an embodiment of the sound generating device provided by the present invention;

[0057] Figure 13 Schematic structural view of the first yoke in the first embodiment of the sound generating device provided by the present invention;

[0058] Figure 14 Schematic structural view of the first yoke in the second embodiment of the sound generating device provided by the present invention;

[0059] Figure 15 Schematic structural view of the first yoke in the third embodiment of the sound generating device provided by the present invention;

[0060] Figure 16 Schematic structural view of the first embodiment of the sound generating module provided by the present invention;

[0061] Figure 17 Schematic structural view of the second embodiment of the sound generating module provided by the present invention;

[0062] Figure 18 Schematic cross-sectional view of the second embodiment of the sound generating module provided by the present invention;

[0063] Figure 19 Schematic structural view of the third embodiment of the sound generating module provided by the present invention;

[0064] Figure 20 Schematic diagram of the simulation effect of an embodiment of the sound generating device provided by the present invention.

[0065] Explanation of the reference numerals in the drawings:

[0066] 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, Step portion; 2123, Second plate portion; 2124, Third plate portion; 2125, 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 hole; 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 conduction plate; 35, Magnetic gap; 400, Module housing; 410, Sound outlet; 420, Rear cavity; 500, Sound generating module.

[0067] 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

[0068] 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 the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0069] It should be noted that all 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.

[0070] 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 that satisfies both A and B at the same time.

[0071] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes 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.

[0072] 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 can be a mobile phone, an earphone, a smart wearable device, etc., which is not limited herein.

[0073] Please refer to Figures 1 to 15 As shown, in an embodiment of the present invention, the sound generating device 100 includes a first sound generating unit 101 and a second sound generating unit 102 arranged side by side in a first direction. Both the first sound generating unit 101 and the second sound generating unit 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. 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. Each vibration plate 212 includes a first plate portion 2121 and a second plate portion 2123 located on different horizontal planes. The first plate portion 2121 is respectively connected to the top of the corresponding voice coil 22 and the corresponding diaphragm 211. 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 first plate portion 2121 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 from each other in the second direction. The first central magnet 331 and the second central magnet 332 are located on opposite sides of the second plate portion 2123, and their projections in the second direction are located inside the voice coil 22. One side of each first central magnet 331 and each second central magnet 332 facing the diaphragm assembly 21 is exposed in the internal cavity of the sound generating device 100. Each first central magnet 331 and each second central magnet 332 are magnetized in the second direction and have opposite magnetization directions; wherein, each first central magnet 331 is close to the top of a voice coil 22, each second central magnet 332 is close to the bottom of a voice coil 22, and the magnetic energy product of the first central magnet 331 of at least one central magnetic portion 33 is greater than that of the second central magnet 332.

[0074] In this embodiment, the sound generating device 100 may be a micro speaker. It can be understood that the first sound generating unit 101 and the second sound generating unit 102 of the sound generating device 100 are arranged side by side along the first direction. The first sound generating unit 101 and the second sound generating unit 102 of the sound generating device 100 may be connected and fixed through a housing, a bracket or a frame, or the first sound generating unit 101 and the second sound generating unit 102 of the sound generating device 100 may be arranged in the module housing as a split structure along the first direction, which is not limited herein.

[0075] It can be understood that each of the first sound generating unit 101 and the second sound generating unit 102 of the sound generating device 100 may be a single structure of a sound generating device, which is not limited herein. The first sound generating unit 101 and the second sound generating unit 102 both 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 reciprocates 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 unit 101 and the second sound generating unit 102 both vibrate along the second direction, so that the sound generating device 100 is simultaneously provided with a dual vibration system 2, improving the acoustic performance and listening effect of the whole machine, and arranging the first sound generating unit 101 and the second sound generating unit 102 side by side along the first direction to form 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 small.

[0076] In this embodiment, the magnetic circuit systems 3 and the vibration systems 2 of the first sound generating unit 101 and the second sound generating unit 102 in the sound generating device 100 are arranged oppositely. The magnetic circuit systems 3 and the vibration systems 2 may be installed and fixed through the housing 1, that is, the magnetic circuit systems 3 and the vibration systems 2 are fixed on the housing 1, so that the first sound generating unit 101 or the second sound generating unit 102 is used as 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 may be directly fixed to the magnetic circuit system 3; or, the magnetic circuit system 3 and the vibration system 2 may be used as a split structure, which is not limited herein.

[0077] It should be noted that the two magnetic circuit systems 3 and the two vibration systems 2 of the first sound generating unit 101 and the second sound generating unit 102 may be installed and fixed through a housing 1, so that the first sound generating unit 101 and the second sound generating unit 102 are integrated into an integral structure, which is not limited herein.

[0078] Optionally, the outer contour of the first sound emitting element 101 and the second sound emitting element 102 may 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 may be selected as a frame or a framework structure, that is, the housing 1 has a cavity with openings at both 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 to and spaced from the magnetic circuit system 3. The housing 1 may be a steel sheet structure or a plastic structure, which is not limited herein.

[0079] Optionally, the housing 1 may be an integral structure or may be formed by the cooperation of two split structures, 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 emitting element 101 and the second sound emitting element 102 to connect and conduct the two voice coils 22 to an external circuit through the conductive terminals.

[0080] In this embodiment, the magnetic circuit systems 3 of the first sound emitting element 101 and the second sound emitting element 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, so that the side magnetic part 34 is arranged outside the central magnetic part 33 and is spaced from the central magnetic part 33 to form a magnetic gap 35. By setting each central magnetic part 33 as two central magnets arranged opposite to and spaced from each other in 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.

[0081] 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 arranged 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 in 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 the corresponding vibrating plate 212 to vibrate between the first central magnet 331 and the second central magnet 332, so as to utilize 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 loudspeaker, the central magnetic part 33 of the first sound generating monomer 101 and the second sound generating monomer 102 in the present invention cancels the central washer (or central magnetic guide plate) structure, thereby reducing the thickness of the first sound generating monomer 101 and the second sound generating monomer 102 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 are repelled and all transmitted to the outside of the voice coil 22. As a result, the distribution of the 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.

[0082] Meanwhile, by setting the vibrating plates 212 of the first sound generating monomer 101 and the second sound generating monomer 102 as the first plate portion 2121 and the second plate portion 2123 located on different horizontal planes along the second direction, the first plate portion 2121 is respectively connected to the top of the corresponding voice coil 22 and the corresponding diaphragm 211, 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. Thus, by connecting the first plate portion 2121 to the top of the corresponding voice coil 22, and setting 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 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, and 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. In this way, 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 cooperates with the second plate portion 2123 to accommodate the first central magnet 331 and the second central magnet 332, and the voice coil 22 is affected by the magnetic field of the first central magnet 331 when approaching the first central magnet 331, and the voice coil 22 is affected by the magnetic field of the second central magnet 332 when approaching 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.

[0083] In one embodiment, each first central magnet 331 is close to the top of the corresponding voice coil 22, and each second central magnet 332 is close to the bottom of the corresponding voice coil 22; wherein, the magnetic energy product of the first central magnet 331 of at least one central magnetic portion 33 of the first sound generating monomer 101 and the second sound generating monomer 102 is greater than that of the second central magnet 332. It can be understood that by setting like this, it can be ensured that the magnetic field strength of the first central magnet 331 is greater than that of the second central magnet 332.

[0084] In this embodiment, as Figures 3 to 8 shown, each side magnetic portion 34 is located outside the corresponding second central magnet 332, so that the magnetic field strength in the magnetic gap 34 formed by the cooperation of the side magnetic portion 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 strength at both ends of the voice coil 22 can be balanced, and the flatness of the BLx curve can be further improved, thereby reducing distortion.

[0085] Optionally, the magnetic energy product of the first central magnet 331 in the first sound generating unit 101 is greater than that of the second central magnet 332; the magnetic energy product of the first central magnet 331 in the second sound generating unit 102 is greater than that of the second central magnet 332.

[0086] In this embodiment, as Figure 4 and Figure 5 shown, 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 that 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 intensity of the first central magnet 331 is greater than that of the second central magnet 332. In this embodiment, as Figure 3 , Figure 4 , Figure 5 shown, the outer contours of the first central magnet 331 and the second central magnet 332 of the first sound generating unit 101 and the second sound generating unit 102 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 making the magnetic field intensity of the first central magnet 331 greater than that of the second central magnet 332.

[0087] Optionally, the voice coil 22 is an annular voice coil and extends in the second direction. Thus, the vibrating plate 212 is arranged as a first plate portion 2121 and a second plate portion 2123 located on different horizontal planes in the second direction, so that the top of the voice coil 22 is connected to the first plate portion 2121, that is, the voice coil 22 and the diaphragm 211 are 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, the voice coil 22 and the second plate portion 2123 cooperate to provide an accommodation space for the first central magnet 331 to ensure the normal operation of the first sound generating unit 101.

[0088] The sound generating device 100 of the present invention is provided with a first sound generating unit 101 and a second sound generating unit 102 arranged side by side in a first direction, and both the first sound generating unit 101 and the second sound generating unit 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 an electric current is passed into the voice coils 22 of the first sound generating unit 101 and the second sound generating unit 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. Therefore, the sound generating device 100 simultaneously has a double vibration system 2, improving the acoustic 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 unit 101 and the second sound generating unit 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 the vibration plates 212 of the first sound generating unit 101 and the second sound generating unit 102 are both set as a first plate part 2121 and a second plate part 2123 located on different horizontal planes in the second direction. Each 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. The 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. The magnetic energy product of the first central magnet 331 of at least one central magnetic part 33 is greater than that of the second central magnet 332. Therefore, the magnetic field intensity in the area where the voice coil 22 is located is increased by the first central magnet 331 and the second central magnet 332, 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 and improving the sound quality, and thus improving the acoustic 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 on different horizontal planes along the second direction, and the projections of the first central magnet 331 and the second central magnet 332 along the second direction are located inside the voice coil 22. In this way, during the movement of the diaphragm assembly 21, the cooperation between the voice coil 22 and the second plate portion 2123 is respectively used to provide 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 far 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 thinner 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.

[0089] In one embodiment, each vibrating plate 212 further includes a third plate portion 2124. Each third plate portion 2124 is located inside a voice coil 22 and is attached to the inner peripheral wall of a voice coil 22. The two ends of each third plate portion 2124 along the second direction are respectively connected to a first plate portion 2121 and a second plate portion 2123; wherein, the first plate portion 2121, the third plate portion 2124, and the second plate portion 2123 of each vibrating plate 212 are an integrally formed structure.

[0090] In this embodiment, as Figure 8 、 Figure 11 、 Figure 12 shown, the first sound generating unit 101 and the second sound generating unit 102 are integrally formed by setting the vibrating plate 212, that is, the first plate portion 2121, the third plate portion 2124, and the second plate portion 2123 of the vibrating plate 212 are an integrally formed structure. In this way, it can not only improve the structural strength of the vibrating plate 212, but also improve the sealing performance. Optionally, the first plate portion 2121, the third plate portion 2124, and the second plate portion 2123 of each vibrating plate 212 can be integrally stamped.

[0091] It can be understood that each third plate portion 2124 extends along the second direction, and each third plate portion 2124 is located inside the corresponding voice coil 22 and is attached to the inner peripheral wall of the corresponding voice coil 22, so that the first plate portion 2121 and the second plate portion 2123 of the vibrating plate 212 are connected to both ends of the third plate portion 2124 along the second direction. It can not only realize the connection and fixation of the first plate portion 2121 and the second plate portion 2123, but also further improve the connection stability and strength between the vibrating plate 212 and the voice coil 22 by using the first plate portion 2121 and the third plate portion 2124.

[0092] In this embodiment, the third plate portion 2124 of the diaphragm 212 of the first sound generating unit 101 and the second sound generating unit 102 is optionally perpendicular to the second plate portion 2123, so that each third plate portion 2124 and the corresponding second plate portion 2123 enclose a receiving groove 2125, and each first plate portion 2121 extends in a direction away from the corresponding receiving groove 2125. A central magnet corresponds to the receiving groove 2125, that is, the first central magnet 331 corresponds to the receiving groove 2125. Thus, when each voice coil 22 moves along the second direction and approaches the corresponding first central magnet 331, each receiving groove 2125 provides a receiving space for the corresponding first central magnet 331.

[0093] It can be understood that in order to prevent the second plate portion 2123 from colliding and interfering with the first central magnet 331 and the second central magnet 332 when vibrating between the first central magnet 331 and the second central magnet 332 during the vibration of the voice coil 22. Optionally, the extension length of each third plate portion 2124 along the second direction is less than the extension length of the corresponding voice coil 22 along the second direction.

[0094] In one embodiment, each vibration system 2 further includes 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 fittingly connected to the inner peripheral wall of the voice coil 22, and a third connecting portion 233 located inside the voice coil 22. Each first plate portion 2121 is connected to the corresponding first connecting portion 231, and each second plate portion 2123 is connected to the corresponding third connecting portion 233.

[0095] In this embodiment, as Figures 3 to 7 、 Figure 9 、 Figure 10 shown, the first sound generating unit 101 and the second sound generating unit 102 set the diaphragm 212 as a split structure, and at the same time, a waterproof film 23 is provided for each. Each waterproof film 23 is provided with a first connecting portion 231, a second connecting portion 232 and a third connecting portion 233, so that the second connecting portion 232 of each waterproof film 23 is fittingly connected to the inner peripheral wall of the corresponding voice coil 22, and the first connecting portion 231 of each is connected to the corresponding first plate portion 2121, and each third connecting portion 233 is connected to the corresponding second plate portion 2123. In this way, the connection and fixation of the first plate portion 2121 and the second plate portion 2123 can be realized, and 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 sealing effect can be enhanced.

[0096] Optionally, the first connecting portion 231, the second connecting portion 232, and the third connecting portion 233 of each waterproof film 23 are of an integrally formed structure. It can be understood that this can not only improve the structural strength of the waterproof film 23, but also improve the waterproof sealing performance.

[0097] In this embodiment, the second connecting portion 232 and the third connecting portion 233 of each waterproof film 23 are optionally arranged vertically, so that the second connecting portion 232 and the third connecting portion 233 enclose a receiving groove 2125. The first connecting portion 231 extends in a direction away from the receiving groove 2125. A central magnet corresponds to the receiving groove 2125, that is, the first central magnet 331 corresponds to the receiving groove 2125. Thus, when the voice coil 22 moves in the second direction and approaches the first central magnet 331, each receiving groove 2125 provides a receiving space for the corresponding first central magnet 331. Optionally, the first connecting portion 231 and the third connecting portion 233 of each waterproof film 23 are respectively connected to both ends of the second connecting portion 232 in the second direction.

[0098] It can be understood that in order to prevent the second plate portion 2123 from colliding and interfering with the first central magnet 331 and the second central magnet 332 when vibrating between the first central magnet 331 and the second central magnet 332 during the vibration of the voice coil 22, optionally, the extension length of the second connecting portion 232 of each waterproof film 23 in the second direction is less than the extension length of the corresponding voice coil 22 in the second direction.

[0099] In this embodiment, the top of each 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, the first plate portion 2121 is clamped between the top of the voice coil 22 and the 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 the corresponding first plate portion 2121 and the top of the corresponding voice coil 22, which is not limited herein.

[0100] Of course, in other embodiments, the inner peripheral edge of each diaphragm 211 may be connected to the corresponding 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 the corresponding 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 the corresponding first plate portion 2121 facing away from the first connecting portion 231; or, the inner peripheral edge of each diaphragm 211 is clamped between the corresponding first plate portion 2121 and the corresponding first connecting portion 231, which is not limited herein.

[0101] 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, the second plate portion 2123 is provided on the side of the third connecting portion 233 facing the top of the voice coil 22, that is, each second plate portion 2123 is provided on the side of the corresponding third connecting portion 233 facing the top of the voice coil 22.

[0102] It should be noted that each accommodating groove 2125 not only provides an accommodating space for the corresponding 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 and the second sound generating unit 102.

[0103] In one embodiment, as Figure 7 、 Figure 8 、 Figures 10 to 12 shown, the outer periphery of each first plate portion 2121 is recessed and bent toward the voice coil 22 to form a stepped portion 2122, and the inner peripheral edge of each diaphragm 211 is supported and lapped on the corresponding stepped portion 2122.

[0104] In this embodiment, by recessing and bending the outer periphery of each first plate portion 2121 to form a second stepped portion 2122, the inner peripheral edge of the corresponding diaphragm 211 is fixed by using each second stepped portion 2122, and the inner peripheral edge of the diaphragm 211 is positioned and limited. At the same time, when the inner peripheral edge of each diaphragm 211 is supported and lapped on the corresponding second stepped portion 2122, the inner peripheral edge of the diaphragm 211 is optionally flush with the first plate portion 2121, so that the matching structure of the first plate portion 2121 and the diaphragm 211 can be more compact, reducing the occupied vibration space.

[0105] It can be understood that the second stepped portion 2122 is formed by being recessed and bent from the outer periphery of the first plate portion 2121 towards 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 it cooperates with the second connecting portion 232 to limit and install the top of the voice coil 22, thereby further improving the connection stability of the voice coil 22.

[0106] In one embodiment, along the second direction, the distance from the side of each 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 each second plate portion 2123 facing the second central magnet 332 to the second central magnet 332.

[0107] In this embodiment, as Figures 4 to 8 shown, each second plate portion 2123 has a first surface facing the corresponding first central magnet 331 and a second surface facing the corresponding second central magnet 332. Optionally, the distance from the first surface to the first central magnet 331 in the first sound generating unit 101 and the second sound generating unit 102 is the same as the distance from the second surface to the second central magnet 332. In this way, when each voice coil 22 drives the corresponding second plate portion 2123 to vibrate along the second direction, it can effectively prevent each second plate portion 2123 from colliding and interfering with the corresponding first central magnet 331 and the corresponding second central magnet 332. Optionally, the projection of each second plate portion 2123 in the first direction is located in the middle of the corresponding voice coil 22.

[0108] It should be noted that the vibration system 2 of the first sound generating unit 101 and the second sound generating unit 102 further includes a centering washer. One end of the centering washer is connected to the voice coil 22, and the other end 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 prevent the voice coil 22 from being polarized or swinging during vibration.

[0109] In one embodiment, each magnetic circuit system 3 further includes a first magnetic yoke 31 and a second magnetic yoke 32 which are arranged oppositely. The side of each first central magnet 331 facing away from the diaphragm assembly 21 is connected to the corresponding first magnetic yoke 31, and the side of each second central magnet 332 facing away from the diaphragm assembly 21 and the side magnetic portion 34 are both connected to the corresponding second magnetic yoke 32.

[0110] In this embodiment, as Figures 1 to 8 、 Figures 13 to 15 shown, by setting each magnetic circuit system 3 in the first sound generating unit 101 and the second sound generating unit 102 as the first magnetic yoke 31 and the second magnetic yoke 32, the first magnetic yoke 31 and the second magnetic yoke 32 are arranged oppositely. In this way, the first magnetic yoke 31 and the second magnetic yoke 32 can be used to respectively install and fix the two central magnets, and at the same time, the magnetic lines of force of the two central magnets are gathered to form a magnetic circuit.

[0111] Understandably, one side of each first central magnet 331 facing away from the diaphragm assembly 21 is connected to the corresponding first magnetic yoke 31, and one side of each second central magnet 332 facing away from the diaphragm assembly 21 is connected to the corresponding second magnetic yoke 32. Optionally, the projected area of each first magnetic yoke 31 in the second direction is greater than or equal to the projected area of the corresponding first central magnet 331 in the second direction, and the projected area of each second magnetic yoke 32 in the second direction is greater than or equal to the projected area of the corresponding 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 installed and fixed, but also a magnetic focusing effect is achieved. In this embodiment, the first magnetic yoke 31 and the second magnetic yoke 32 can be selected as a magnetic conductive plate structure.

[0112] In an embodiment, each first magnetic yoke 31 is provided with a first recess corresponding to each first central magnet 331, and each first central magnet 331 is disposed in a first recess. Understandably, such a setting can utilize the first recess to achieve positioning and installation of 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.

[0113] In this embodiment, the first recess can be formed by the side of the first magnetic yoke 31 facing the first central magnet 331 being recessed, and at this time, the side of the first magnetic yoke 31 facing away from the first central magnet 331 is flat; or, the first recess can be formed by the first magnetic yoke 31 being bent toward the side away from the first central magnet 331, and at this time, the side of the first magnetic yoke 31 facing away from the first central magnet 331 is convex at the position corresponding to the first recess, and no limitation is made here.

[0114] In an embodiment, each second magnetic yoke 32 is provided with a second recess corresponding to each second central magnet 332, and each second central magnet 332 is disposed in a second recess. Understandably, such a setting can utilize the second recess to achieve positioning and installation of the second central magnet 332, improving the installation stability. Moreover, the assembly height between the second central magnet 332 and the second magnetic yoke 32 can be reduced, increasing the vibration space of the diaphragm assembly 21.

[0115] In this embodiment, the second recess can be formed by the side of the second magnetic yoke 32 facing the second central magnet 332 being recessed, and at this time, the side of the second magnetic yoke 32 facing away from the second central magnet 332 is flat; or, the second recess can be formed by the second magnetic yoke 32 being bent toward the side away from the second central magnet 332, and at this time, the side of the second magnetic yoke 32 facing away from the second central magnet 332 is convex at the position corresponding to the second recess, and no limitation is made here.

[0116] In one embodiment, each magnetic circuit system 3 further includes a side magnetic part 34 provided on the side magnetic part of the corresponding second magnetic yoke 32. Each side magnetic part 34 is located outside the corresponding second central magnet 332 and is spaced apart from the corresponding second central magnet 332 to form a magnetic gap 35.

[0117] In this embodiment, as Figures 3 to 8 shown, by disposing the side magnetic part 34 on the second magnetic yoke 32 and outside the second central magnet 332, the side magnetic part 34 is spaced apart from the second central magnet 332 to form a magnetic gap 35, thereby effectively ensuring the magnetic field strength within the magnetic gap 35.

[0118] It can be understood that the side magnetic parts 34 of the first sounding element 101 and the second sounding element 102 not only form a magnetic circuit with the second central magnet 332 through the second magnetic yoke 32, such that the magnetic force lines within the magnetic gap 35 pass through the voice coil 22, but also the side magnetic parts 34 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 increasing the BL value, making the distribution of magnetic force lines more uniform, and making the BLx curve flatter, thereby reducing distortion.

[0119] 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. In this case, the side magnetic part 34 includes multiple parts, and the multiple side magnetic parts 34 are spaced apart and disposed around the outside of the second central magnet 332, which is not limited herein.

[0120] 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 arranged in a stacked manner, and each side magnet 341 is connected to the corresponding second magnetic yoke 32. It can be understood that both the side magnet 341 and the side magnetic conductive plate 342 of each side magnet 341 are located outside the corresponding second central magnet 332 and are spaced apart from the corresponding second central magnet 332 to form a magnetic gap 35.

[0121] Optionally, the structural contours of the side magnet 341 and the side magnetic conductive plate 342 of each 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.

[0122] In one embodiment, the projection of each side magnetic conductive plate 342 in the first direction is located between the top and the bottom of the corresponding voice coil 22.

[0123] In this embodiment, when the first sound generating unit 101 and the second sound generating unit 102 are not working, that is, when the voice coils 22 of the first sound generating unit 101 and the second sound generating unit 102 do not vibrate, the projection of each side magnetic conductive plate 342 in the first direction is located between the top 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 vibration, 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 changes very little, and make the magnetic field line distribution of the magnetic circuit system 3 more uniform and the BLx curve flatter, thereby reducing distortion.

[0124] It should be noted that when the voice coils 22 of the first sound generating unit 101 and the second sound generating unit 102 are in a small amplitude, the projection of the side magnetic conductive plate 342 in the first direction is located between the top and the bottom of the voice coil 22. For the voice coil 22 in a small amplitude, only when the voice coil 22 does not vibrate, the projection of the side magnetic conductive plate 342 in the first direction is located between the top and the bottom of the voice coil 22, which is not limited herein.

[0125] In one embodiment, the projection of each side magnetic conductive plate 342 in 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.

[0126] In this embodiment, as Figures 4 to 8 shown, by arranging the projection of the side magnetic conductive plate 342 of the side magnetic part 34 of the first sound generating unit 101 and the second sound generating unit 102 in 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 field lines pass through the voice coil 22, thereby increasing the magnetic field intensity, effectively improving the BL value, making the magnetic field line distribution more uniform and the BLx curve flatter, thereby reducing distortion.

[0127] Optionally, the thickness of each side magnet 341 in the second direction is greater than the thickness of the corresponding second central magnet 332 in the second direction. In this embodiment, by setting the thickness of the side magnet 341 in the second direction to be greater than the thickness of the second central magnet 332 in the second direction, on the one hand, it is ensured that the projection of the side magnetic conduction plate 342 in 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. The above setting can also ensure that the side magnet 341 forms magnetic circuits with equivalent magnetic field intensities with the first central magnet 331 and the second central magnet 332 respectively.

[0128] Of course, in other embodiments, the second magnetic yoke 32 of the first sound generating unit 101 and the second sound generating unit 102 includes a bottom portion and a side portion (not shown in the figure) bent and extended 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 magnetic yoke 32 to have a bottom portion and a side portion disposed at an angle, the side portion of the second magnetic yoke 32 is located outside the second central magnet 332 and is spaced from the second central magnet 332 to form a magnetic gap 35. The bottom portion and the side portion of the second magnetic yoke 32 are preferably an integrally formed structure, and the bottom portion and the side portion are perpendicularly disposed, which is not limited herein.

[0129] In one embodiment, the outer periphery of each first magnetic yoke 31 is bent and extended toward the second magnetic yoke 32 to form a first welding portion 315, and the first welding portion 315 is welded to the second magnetic yoke 32. It can be understood that the first sound generating unit 101 and the second sound generating unit 102 are welded to the second magnetic yoke 32 through the first welding portion 315 of the first magnetic yoke 31, thereby improving the connection stability. In this way, when the first sound generating unit 101 and the second sound generating unit 102 are applied to an electronic device and phenomena such as dropping occur, the structures of the first sound generating unit 101 and the second sound generating unit 102 can be ensured to be stable.

[0130] 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 magnetic yoke 31, and the plurality of first welding portions 315 are all welded to the outer periphery of the corresponding second magnetic yoke 32, which is not limited herein.

[0131] In this embodiment, as Figures 1 to 6 , Figures 13 to 15 shown, each first magnetic 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 magnetic yoke 32 to form a first welding portion 315. Optionally, the top plate portion 311, the side plate portion 312 and the first welding portion 315 of the first magnetic yoke 31 are an integrally formed structure, which is not limited herein.

[0132] Optionally, the two first yokes 31 are integrally formed structures and are arranged along the first direction. In this embodiment, as shown in Figure 1 , Figure 3 , Figure 4 , Figures 13 to 15 , the first yokes 31 of the first sound generating unit 101 and the second sound generating unit 102 are integrally formed structures.

[0133] In an 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 first yoke 31. It can be understood that the first sound generating unit 101 and the second sound generating unit 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 unit 101 is applied to an electronic device and drops or other phenomena occur, the structure of the first sound generating unit 101 can be ensured to be stable, and the anti-drop performance of the sound generating device can be improved.

[0134] Optionally, there are multiple second welding portions, and the multiple second welding portions are spaced 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.

[0135] 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 integrally formed structures, and no limitation is made here.

[0136] Optionally, the two second yokes 32 are integrally formed structures and are arranged along the first direction. In this embodiment, as shown in Figures 2 to 4 , the second yokes 32 of the first sound generating unit 101 and the second sound generating unit 102 are integrally formed structures.

[0137] In an embodiment, the first sound generating unit 101 and the second sound generating unit 102 both further include a housing 1, and each housing 1 is respectively connected to the corresponding first yoke 31 and the corresponding second yoke 32, and is located between the corresponding first yoke 31 and the corresponding second yoke 32. Each first yoke 31 at least includes a top plate portion 311 on the side of a 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.

[0138] In this embodiment, the magnetic circuit systems 3 and the vibration systems 2 of the first sound emitting monomer 101 and the second sound emitting monomer 102 are both connected to the housing 1. It can be understood that the two housings of the first sound emitting monomer 101 and the second sound emitting monomer 102 can be separately arranged, that is, the housing of each sound emitting monomer is independent.

[0139] Of course, in other embodiments, the two housings 1 of the first sound emitting monomer 101 and the second sound emitting monomer 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.

[0140] In this embodiment, as Figures 1 to 6 shown, the first sound emitting monomer 101 and the second sound emitting monomer 102 are provided with 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 magnetic yoke 31 and the second magnetic yoke 32 along the second direction. The first magnetic yoke 31 is connected to the housing 1, and the second magnetic yoke 32 can be connected to the housing 1 directly or indirectly, which is not limited herein.

[0141] It can be understood that each first magnetic yoke 31 at least includes a top plate portion 311 located on the side of a diaphragm assembly 21 facing away from the second magnetic yoke 32, so as to install and fix two first central magnets 331 by using the top plate portion 311. In this way, the outer peripheral edge of the diaphragm 211 is connected to one end of the housing 1 away from the second magnetic yoke 32, so that the diaphragm 211 is opposite to and spaced from the top plate portion 311, so as to ensure the vibration of the diaphragm 211.

[0142] In this embodiment, the first magnetic yoke 31 can be a flat plate structure. At this time, the first magnetic yoke 31 forms the top plate portion 311, and the first magnetic yoke 31 and the housing 1 can be of an integrally formed structure. Optionally, each housing 1 is a plastic housing, and each housing 1 and the corresponding first magnetic yoke 31 are integrally injection molded. Of course, in other embodiments, the first magnetic yoke 31 and the housing 1 can also be connected by welding or bonding, which is not limited herein.

[0143] It can be understood that each housing 1 can be a frame structure or a framework with openings at both ends. At this time, the first magnetic yoke 31 is connected to the same end of the two housings 1, and the second magnetic yoke 32 is located at the end of the two housings 1 away from the first magnetic yoke 31. Of course, in other embodiments, the housing 1 includes a straight portion and a vertical portion arranged at an angle. The straight portion is provided with an installation opening, the first magnetic yoke 31 covers the two installation openings, and the second magnetic yoke 32 is located on the side of the vertical portions of the two housings 1 facing away from the straight portion, which is not limited herein.

[0144] In one embodiment, each first yoke 31 further includes a side plate portion 312 disposed at an angle with respect to the top plate portion 311. The side plate portion 312 is bent toward the side of the 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.

[0145] In this embodiment, as Figures 1 to 6 , Figures 13 to 15 shown, by setting the first yoke 31 to include a top plate portion 311 and a side plate portion 312 disposed at an angle, and by providing a support platform 313 on the side plate portion 312, the support platform 313 can be used to both position and install the housing 1, and the outer periphery of the diaphragm 211 can be fixed by the housing 1 and the support platform 313. Further, the support platform 313 can position the outer periphery of the diaphragm 211 away from the top plate portion 311, thus ensuring the vibration of the diaphragm 211.

[0146] 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.

[0147] Of course, in other embodiments, the outer periphery 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 provided with a support platform or other structures, and the outer periphery of the diaphragm 211 is fixed to such support platform or other structures, which is not limited herein.

[0148] In one embodiment, each side magnetic portion 34 includes a side magnet 341 and a side magnetic guide plate 342 stacked on top of each other. Each side magnet 341 is connected to the corresponding second yoke 32, and each side magnetic guide plate 342 is connected to the corresponding housing 1; wherein, each side magnetic guide plate 342 and the corresponding housing 1 are an integrally formed structure.

[0149] In this embodiment, as Figures 3 to 5 shown, the side magnetic portion 34 of each magnetic circuit system 3 is disposed on the second yoke 32, and the second yoke 32 can be connected to the housing 1 through the side magnetic portion 34. Optionally, the side magnetic guide plate 342 of the side magnetic portion 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 guide 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 guide plate 342 are integrally formed by stretching, which is not limited herein. Of course, in other embodiments, the housing 1 and the side magnetic guide plate 342 can also be connected by welding or bonding, which is not limited herein.

[0150] It should be noted that the outer shell 1 is used to fix the diaphragm 211 of the magnetic circuit system 3 and the vibration system 2, and can also be used to support the first magnetic yoke 31 and the second magnetic yoke 32, so that the first magnetic yoke 31 and the second magnetic yoke 32 are relatively and spaced apart.

[0151] In one embodiment, a first cavity 11 is formed between each first magnetic yoke 31 and the corresponding diaphragm assembly 21. Each first central magnet 331 is located in the corresponding first cavity 11. The first sound generating unit 101 and the second sound generating unit 102 are both provided with sound outlet holes 314 communicating with the corresponding first cavities 11.

[0152] In this embodiment, as Figure 4 、 Figure 5 shown, a first cavity 11 is formed between the first magnetic yokes 31 of the first sound generating unit 101 and the second sound generating unit 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 generating unit 101 is also provided with a sound outlet hole 314 communicating with the first cavity 11.

[0153] It should be noted that the first cavities 11 of the first sound generating unit 101 and the second sound generating unit 102 can be optionally arranged to be isolated from each other, so as to ensure that the diaphragms 211 of the first sound generating unit 101 and the second sound generating unit 102 can emit sound smoothly during vibration and avoid acoustic interference between them.

[0154] 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 magnetic yokes 31; or, the two sound outlet holes 314 are respectively arranged at the connection between the corresponding outer shell 1 and the corresponding first magnetic yoke 31, which is not limited here.

[0155] In one embodiment, each first magnetic 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 portion 311 and are opposite to the corresponding diaphragm 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 15As shown, one sound outlet hole 314 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, which is not limited herein.

[0156] It can be understood that when the sound outlet holes 314 of the first sound generating element 101 and the second sound generating element 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 is provided on the housing of the electronic device or the sound generating module and is directly opposite to the sound outlet holes 314 of the first sound generating element 101 and the second sound generating element 102, so that the electronic device or the sound generating module has a front sound output structure. Or, 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 element 101 and the second sound generating element 102 through a sound outlet channel, thereby making the electronic device or the sound generating module have a side sound output structure.

[0157] Certainly, in other embodiments, when the sound outlet holes 314 of the first sound generating element 101 and the second sound generating element 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 element 101 and the second sound generating element 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. Or, 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 element 101 and the second sound generating element 102, thereby making the electronic device or the sound generating module have a side sound output structure.

[0158] Or, one sound outlet hole 314 of the first sound generating element 101 and the second sound generating element 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 element 101 and the second sound generating element 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.

[0159] In one embodiment, the edge magnetic portion 34 includes a shared edge magnetic portion, the shared edge magnetic portion is located between the two central magnetic portions 33, and the shared edge magnetic portion cooperates with the two central magnetic portions 33 respectively to form corresponding magnetic gaps 35.

[0160] In this embodiment, as Figure 3 and Figure 4As shown, the two central magnetic parts 33 of the first sound - generating monomer 101 and the second sound - generating monomer 102 are arranged at intervals along the first direction. Optionally, a common side magnetic part 34 (i.e., a common - side magnetic part) is shared between the two central magnetic parts 33.

[0161] In this embodiment, the side magnetic parts 34 of the first sound - generating monomer 101 and the second sound - generating monomer 102 are arranged outside the central magnetic parts 33. The side magnetic part 34 can be an integral annular structure. At this time, the two side magnetic parts 34 can be an integral - molding structure and extend and are arranged along the first direction. The integrally - molded 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 monomer 101 and the second sound - generating monomer 102 can also be separately arranged, such as Figure 3 and Figure 4 As shown, at this time, a part of the adjacent two side magnetic parts 34 between the two central magnetic parts 33 forms a common side magnetic part, that is, a part of the side magnetic part 34 is shared between the two central magnetic parts 33, which is not limited herein.

[0162] In one embodiment, the two diaphragms 211 are an integral - molding structure and are arranged along the first direction. In this embodiment, as Figure 3 shown, the two diaphragms 211 of the first sound - generating monomer 101 and the second sound - generating monomer 102 can be an integral - molding structure and are arranged along the first direction.

[0163] In one embodiment, the two diaphragm assemblies 21 jointly radiate sound waves outward on the same side of the sound - generating device 100. It can be understood that the two diaphragm assemblies 21 jointly 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.

[0164] Optionally, the two diaphragm assemblies 21 of the first sound - generating monomer 101 and the second sound - generating monomer 102 simultaneously radiate sound waves with the same phase outward. In this embodiment, the two diaphragm assemblies 21 can be vibrated in the same direction. The two diaphragm assemblies 21 jointly radiate sound waves outward on the same side of the sound - generating device 100, which can achieve the superposition and enhancement of sound waves and improve the loudness.

[0165] Optionally, the two diaphragm assemblies 21 of the first sound - generating monomer 101 and the second sound - generating monomer 102 simultaneously radiate sound waves with opposite phases outward. In this embodiment, the two diaphragm assemblies 21 of the first sound - generating monomer 101 and the second sound - generating monomer 102 can be vibrated in the opposite direction. In this way, the two diaphragm assemblies 21 of the first sound - generating monomer 101 and the second sound - generating monomer 102 are both communicated with the external environment, and the two diaphragm assemblies 21 radiate sound waves with opposite phases to the external environment. The two sound waves with opposite phases cancel each other out in the far - field, which is applicable to environments that require far - field noise cancellation and privacy protection.

[0166] 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, and the structural design can be exactly the same, thus simplifying the debugging of the whole machine.

[0167] As Figures 16 to 19 As shown, the present invention also provides 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 all the foregoing embodiments, it has at least all the beneficial effects brought by the technical solutions of the foregoing embodiments, and will not be elaborated herein one by one.

[0168] In an embodiment, there is a module housing 400 which 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.

[0169] 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 a module upper shell and a module lower shell, and the module upper shell and the module lower shell are butt-connected and enclose to form a receiving cavity. Optionally, the module upper shell and the module lower shell can be adhesively connected or welded.

[0170] 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.

[0171] In this embodiment, 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. At this time, the module upper shell corresponds to the front cavity, and the module lower shell corresponds to the rear cavity 420. It can be understood that the sound outlet 410 is arranged on the module upper shell or at the connection of the module upper shell and the module lower shell.

[0172] In an 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 arranged on the module lower shell. 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 the sound leakage holes can be one or more, which is specifically designed according to actual applications and is not limited herein.

[0173] It can be understood that the upper module shell includes a top wall and a first side wall, and the lower module shell 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 shell 400 of the sound generating module 500, that is, the module shell 400 includes a top wall and a bottom wall arranged opposite to each other and a side wall connecting the top wall and the bottom wall. Optionally, the sound outlet 410 is provided on the top wall or the connection area between the side wall and the top wall, and the sound leakage hole is provided on the side wall or the bottom wall or 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 does not make a limitation here.

[0174] In this embodiment, as Figures 16 to 19 shown, a first opening is provided on the top wall of the upper module shell, and a second opening is provided on the bottom wall of the lower module shell. When the sound generating device 100 is installed in the module shell 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 to install the sound generating device 100 to reduce the thickness of the sound generating module 500 in the Z direction, and no limitation is made here.

[0175] In one embodiment, as Figure 17 and Figure 18 shown, the sound outlet 410 is arranged 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.

[0176] Optionally, there is one sound outlet 410 for the sound generating module 500.

[0177] In one embodiment, the sound outlet 410 is arranged 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 arranged 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 outlet channel, and no limitation is made here.

[0178] 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, and no limitation is made here. 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 arranged opposite to the two diaphragm assemblies 21 of the sound generating device 100, but 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.

[0179] Optionally, the sound outlet 410 is disposed opposite to and in communication with the two sound holes 314 of the sound generating device 100; or, the sound outlet 410 is in communication with the two sound holes 314 of the sound generating device 100 through a sound outlet channel, and this is not limited herein.

[0180] Optionally, the module housing 400 is provided with two sound outlets 410.

[0181] In one embodiment, both of the two sound outlets 410 are 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.

[0182] In another embodiment, as Figure 16 shown, both of the two sound outlets 410 are disposed on the same side of the module housing 400, and both of the two sound outlets 410 are located on one side of the sound generating device 100, so that the sound generating module 500 has a side sound output structure.

[0183] In yet another embodiment, as Figure 19 shown, the two sound outlets 410 are 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.

[0184] It can be understood that in this way, some sound generating elements of the sound generating device 100 in the module housing 400 can have a front sound output structure, and some can have a side sound output structure, realizing the cooperation of the front sound output structure + side sound output structure, which can adapt to various assembly modes of the whole machine and improve the degree of freedom.

[0185] The present invention also provides an electronic device, 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, and will not be elaborated herein one by one.

[0186] The present invention also provides an electronic device, which includes the above-mentioned sound generating module 500. The specific structure of the sound generating module 500 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, and will not be elaborated herein one by one.

[0187] Optionally, the above-mentioned electronic device may be a mobile phone, earphone, computer, PAD, smart wearable device, etc., and the present invention does not make specific limitations thereto.

[0188] The above are only alternative embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is 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. Both of 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. Each voice coil is an annular voice coil and extends in the second direction. Each diaphragm assembly includes a diaphragm and a vibration plate. Each vibration plate includes a first plate portion and a second plate portion located on different horizontal planes. The first plate portion is respectively connected to the top of the corresponding voice coil and the corresponding diaphragm. 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; and A magnetic circuit system. 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 first plate portion 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 second plate portion, and their projections in the second direction are located inside the voice coil. One side of each of the first central magnet and the second central magnet facing the diaphragm assembly is exposed in the internal cavity of the sound generating device. Each of the first central magnet and the second central magnet is magnetized in the second direction and the magnetization directions are opposite; Wherein, each first central magnet is close to the top of one voice coil, each second central magnet is close to the bottom of one voice coil, and the magnetic energy product of the first central magnet of at least one central magnetic portion is greater than that of the second central magnet.

2. The sound generating device according to claim 1, wherein Each vibration plate further includes a third plate portion. Each third plate portion is located inside one voice coil and is adhesively connected to the inner peripheral wall of one voice coil. Both ends of each third plate portion in the second direction are respectively connected to a first plate portion and a second plate portion; Wherein, the first plate portion, the third plate portion and the second plate portion of each vibration plate are of an integrally formed structure.

3. The sound generating device according to claim 1, wherein, Each vibration system further includes a waterproof film. Each waterproof film includes a first connecting portion located on the top of one voice coil, a second connecting portion adhesively connected to the inner peripheral wall of the voice coil, and a third connecting portion located inside the voice coil. Each first plate portion is connected to the corresponding first connecting portion, and each second plate portion is connected to the corresponding third connecting portion.

4. The sound generating device according to claim 3, wherein, Each first connecting portion is clamped between the corresponding first plate portion and the top of the corresponding voice coil; or, the inner peripheral edge of each diaphragm is clamped between the corresponding first plate portion and the corresponding first connecting portion; And / or, each second plate portion is provided on one side of the corresponding third connecting portion 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 extension length of each of the second connecting portions along the second direction is less than the extension length of the corresponding voice coil along 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 corresponding second connecting portion along the second direction.

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

6. The sound generating device according to claim 1, wherein, Each magnetic circuit system further includes a first magnetic yoke and a second magnetic yoke which are oppositely arranged. One side of each first central magnet facing away from the diaphragm assembly is connected to the corresponding 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 corresponding second magnetic yoke.

7. The sound generating device according to claim 6, wherein, 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 second magnetic yoke; 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 first magnetic yoke.

8. The sound generating device according to claim 6, 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 magnetic yoke and the corresponding second magnetic yoke, and is located between the corresponding first magnetic yoke and the corresponding second magnetic yoke. Each first magnetic yoke at least includes a top plate portion located on one side of a diaphragm assembly facing away from the second magnetic yoke. Each first central magnet is disposed on the corresponding top plate portion. The outer periphery 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.

9. The sound generating device according to claim 8, wherein, Each first magnetic yoke further includes a side plate portion disposed at an angle with the top plate portion. The side plate portion is bent towards the diaphragm assembly to form a support platform, and the outer periphery of each diaphragm is clamped between the corresponding housing and the corresponding support platform; And / or, each housing is a plastic housing, and each housing and the corresponding first magnetic 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 side magnetic portion includes a side magnet and a side magnetic conductive plate which are stacked. 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.

10. The sound generating device according to claim 8, wherein, 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 unit and the second sound generating unit are both further provided with sound outlet holes communicating with the corresponding first cavities; Wherein, the two sound outlet holes are respectively disposed on the corresponding housings; Alternatively, each of the first yokes includes a top plate portion and a side plate portion disposed at an angle, and 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 of the sound outlet holes is disposed on the corresponding top plate portion and the other sound outlet hole is disposed on the corresponding side plate portion; Alternatively, the two sound outlet holes are respectively disposed at the joints of the corresponding outer shells and the corresponding first yokes.

11. The sound generating device according to claim 1, wherein, Each of the edge magnetic portions includes an edge magnet and an edge magnetic conductive plate stacked, and each of the edge magnets is located outside the corresponding second central magnet and is spaced from the corresponding second central magnet to form the magnetic gap; wherein, the projection of each of the edge magnetic conductive plates in the first direction is located between the top and the bottom of the corresponding voice coil; and / or, the projection of each of the edge magnetic conductive plates 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 of the edge magnets in the second direction is greater than the thickness of the corresponding second central magnet in the second direction; and / or, the edge magnetic portion includes a shared edge magnetic portion located between the two central magnetic portions, and the shared edge magnetic portion cooperates with the two central magnetic portions respectively to form the corresponding magnetic gaps.

12. The sound generating device according to any one of claims 1 to 11, characterized in that, The two diaphragm assemblies jointly radiate sound waves outward on the same side of the sound generating device; and / or, the two diaphragm assemblies radiate sound waves outward simultaneously in the same phase; or, the two diaphragm assemblies radiate sound waves outward simultaneously in opposite phases.

13. 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 12, the sound generating device is disposed 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.

14. The sound generating module according to claim 13, wherein, The sound outlet is disposed directly opposite to the two 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 disposed on the same side of the module housing, and each sound outlet is disposed directly 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 disposed 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 disposed on different sides of the module housing, one sound outlet is disposed directly 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.

15. An electronic device, characterized in that, The electronic device includes the sound generating module according to claim 13 or 14; or, the electronic device includes the sound generating device according to any one of claims 1 to 12.

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