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 parts of the first sound production single body and the second sound production single body comprise a first central magnet and a second central magnet which are positioned on two opposite sides of the second plate part; the first central magnet and the second central magnet are magnetized along a second direction and are opposite in magnetizing direction; the sound production device further comprises a first magnet yoke and a second magnet yoke which are oppositely arranged in the second direction, and the outer edges of the first magnet yoke and the second magnet yoke are connected in a welded mode. According to the sound production device, the BL value is improved, and distortion is reduced.

Description

Technical Field

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

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

[0003] In related technologies, high-performance speakers are usually double-sided speakers, and their structures adopt a shared magnetic circuit up and down, so that the voice coil and the magnetic circuit are stacked in the Z direction, resulting in a thicker and larger-sized product. Limited by the internal space of intelligent electronic devices and the requirement of thinness and lightness, 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 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. This sound generating device can not only achieve a thinning design, but also effectively increase the volume of the magnet, improve the BL value of the product, make the magnetic field line distribution more uniform, and make the BLx curve flatter, thereby reducing distortion; at the same time, it can meet the space requirements of thinness and miniaturization, and has a dual vibration system, which can improve the 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 along a first direction, and both the first sound generating unit and the second sound generating unit include:

[0006] A vibration system, both of the two vibration systems vibrate along 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 along 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 along the second direction. The first plate portion is respectively connected to the top of the corresponding voice coil and the corresponding diaphragm, and 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 provided outside the central magnetic part, the side magnetic parts are spaced from the central magnetic part 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 along a second direction, the first central magnet and the second central magnet are located on opposite sides of the corresponding second plate part, and their projections along the second direction are located inside the corresponding voice coil, one side 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, and the first central magnet and the second central magnet are magnetized along the second direction and the magnetization directions are opposite;

[0008] Wherein, the sound generating device further includes a first yoke and a second yoke that are oppositely arranged along the second direction, one side of each of the two first central magnets facing away from the diaphragm assembly is connected to the first yoke, one side of each of the two second central magnets facing away from the diaphragm assembly and the two side magnetic parts are connected to the second yoke, and the first yoke and the second yoke are connected by welding.

[0009] In an embodiment, each vibrating plate further includes a third plate part, each third plate part is located inside the corresponding voice coil and is adhesively connected to the inner peripheral wall of the corresponding voice coil, and both ends of each third plate part along the second direction are respectively connected to the corresponding first plate part and the corresponding second plate part;

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

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

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

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

[0014] And / or, the first connecting portion, the second connecting portion and the third connecting portion of each of the waterproof membranes 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 a voice coil along the second direction;

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

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

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

[0019] In an embodiment, the outer periphery of the first yoke is bent and extended towards the second yoke to form a first welding portion, and the first welding portion is welded to the second yoke;

[0020] And / or, the outer periphery of the second yoke is bent and extended towards the first yoke to form a second welding portion, and the second welding portion is welded to the first yoke.

[0021] In an embodiment, the first sound generating element and the second sound generating element both further include a housing. Each housing is respectively connected to the first yoke and the second yoke and is located between the first yoke and the second yoke. The first yoke at least includes a top plate portion located on the side of the diaphragm assembly facing away from the second yoke. Both of the first central magnets are disposed on the top plate portion. The outer peripheral edge of each diaphragm is connected to one end of the corresponding housing away from the second yoke, and each diaphragm is opposite to and spaced from the top plate portion.

[0022] In an embodiment, the first yoke further includes a side plate portion disposed at an angle to the top plate portion. The side plate portion is bent towards the side of the diaphragm assembly to form a support platform, and the outer peripheral edge of each diaphragm is clamped between the corresponding housing and the support platform;

[0023] And / or, each housing is a plastic housing. The two housings are of an integrally formed structure and are arranged along the first direction. The housing and the first yoke are integrally injection molded;

[0024] And / or, each of the side magnetic parts includes a side magnet and a side magnetic conductive plate which are stacked, each of the side magnets is connected to the second magnetic yoke, and each of the side magnetic conductive plates is connected to the corresponding housing; wherein, each of the side magnetic conductive plates and the corresponding housing are of an integrally formed structure.

[0025] In one embodiment, a first cavity is formed between the first magnetic yoke and each of the diaphragm assemblies, each of the first central magnets is located in the corresponding first cavity, and the first sound generating unit and the second sound generating unit are both provided with sound outlet holes communicating the two first cavities;

[0026] Wherein, the two sound outlet holes are both arranged on the housing;

[0027] Or, the first magnetic yoke includes a top plate portion and a side plate portion arranged at an angle, and the two sound outlet holes are both arranged on the top plate portion and are opposite to the corresponding diaphragm; or, the two sound outlet holes are arranged on the side plate portion; or, one sound outlet hole is arranged on the top plate portion and the other sound outlet hole is arranged on the side plate portion;

[0028] Or, the two sound outlet holes are both arranged at the connection part of the housing and the first magnetic yoke.

[0029] In one embodiment, each of the side magnetic parts includes a side magnet and a side magnetic conductive plate which are stacked, the two side magnets are both connected to the second magnetic yoke, each of the side magnets is located outside the corresponding second central magnet and is spaced from the corresponding second central magnet to form a magnetic gap; wherein, the projection of each of the side 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 side magnetic conductive plates in the first direction is located between the surfaces of the first central magnet and the second central magnet facing the diaphragm assembly; and / or, the thickness of each of the side magnets in the second direction is greater than the thickness of the corresponding second central magnet in the second direction;

[0030] And / or, each of the first central magnets is close to the top of the corresponding voice coil, and each of the second central magnets is close to the bottom of the corresponding voice coil; wherein, the magnetic energy product of each of the first central magnets is greater than the magnetic energy product of the corresponding second central magnet; or, the volume of each of the first central magnets is greater than the volume of the corresponding second central magnet; or, the outer contours of each of the first central magnets and the corresponding second central magnets are the same, and the thickness of each of the first central magnets in the second direction is greater than the thickness of the corresponding second central magnet in the second direction;

[0031] And / or, the side magnetic part includes a shared side magnetic part 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.

[0032] In one embodiment, the two diaphragm assemblies jointly radiate sound waves outward on the same side of the sound generating device.

[0033] 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.

[0034] The present invention further provides a sound generating module, which includes:

[0035] A module housing provided with an accommodation cavity; and

[0036] The above-mentioned sound generating device is disposed in the accommodation cavity and divides the accommodation cavity into a front cavity and a rear cavity;

[0037] Wherein, the module housing is provided with a sound outlet communicating with the front cavity.

[0038] In one embodiment, the sound outlet is disposed opposite to both diaphragm assemblies of the sound generating device, so that the sound generating module has a front sound output structure;

[0039] 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 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 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 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.

[0040] The present invention further provides an electronic device, which includes the above-mentioned sound generating module;

[0041] Or, the electronic device includes the above-mentioned sound generating device.

[0042] 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, and both the first sound generating monomer and the second sound generating monomer are set as a magnetic circuit system and a vibration system. Each magnetic circuit system is set as a central magnetic part and a side magnetic part arranged outside the central magnetic part, so that each side magnetic part is spaced from the corresponding central magnetic part to form a magnetic gap. Each vibration system is set as a diaphragm assembly and a voice coil, so that one end of each voice coil is connected to the corresponding diaphragm assembly, and the other end of each voice coil is arranged corresponding to the corresponding magnetic gap. Thus, an electric current is passed into the voice coils of the first sound generating monomer and the second sound generating monomer, so that 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, and then push the air to generate sound, so that the sound generating device simultaneously has a dual vibration system, improves the acoustic performance and listening effect of the whole machine, and reduces the thickness of the sound generating device in the Z direction, so that the sound generating device can meet the spatial requirements of being thin, light, and miniaturized; at the same time, the central magnetic parts of the magnetic circuit systems of the first sound generating monomer and the second sound generating monomer are both set as a first central magnet and a second central magnet arranged opposite and spaced from each other in the second direction, and 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 set as 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. Thus, the first central magnet and the second central magnet are located on opposite sides of the corresponding second plate part, and the projection in the second direction is 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, so as to use the first central magnet and the second central magnet to increase the magnetic field strength in the area where the voice coil is located, 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, which affects the acoustic performance. The first central magnet and the second central magnet cancel the structure of the conventional central washer. Not only can a thinning design be achieved, making the magnetic field line distribution more uniform and the BLx curve flatter, thereby reducing distortion; moreover, under the condition of the same volume requirement, since the structure of the central washer is not provided, the volumes of the first central magnet and the second central magnet can be made larger, thereby improving the BL value of the product. Further, the sound generating device is provided with a first magnetic yoke and a second magnetic yoke arranged oppositely in the second direction, so as to install and fix the magnetic circuit system and the vibration system of the first sound generating unit and the second sound generating unit by using the first magnetic yoke and the second magnetic yoke, and the first magnetic yoke and the second magnetic yoke are welded and connected, thereby improving the connection stability and enhancing the anti-drop performance of the sound generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0044] Figure 1 Schematic diagram of the structure of an embodiment of the sound generating device provided by the present invention;

[0045] Figure 2 Schematic diagram of the structure of another perspective of an embodiment of the sound generating device provided by the present invention;

[0046] Figure 3 Exploded view of an embodiment of the sound generating device provided by the present invention;

[0047] Figure 4 Cross-sectional view of an embodiment of the sound generating device provided by the present invention;

[0048] Figure 5 Cross-sectional view of another perspective of an embodiment of the sound generating device provided by the present invention;

[0049] Figure 6 For Figure 5 Enlarged view of part A in

[0050] Figure 7 Partial enlarged cross-sectional view of an embodiment of the sound generating device provided by the present invention;

[0051] Figure 8 Partial enlarged cross-sectional view of another embodiment of the sound generating device provided by the present invention;

[0052] Figure 9 Exploded view of the diaphragm and the waterproof film in an embodiment of the sound generating device provided by the present invention;

[0053] Figure 10 Exploded view of the diaphragm and the waterproof film in another embodiment of the sound generating device provided by the present invention;

[0054] Figure 11 Structural diagram of the diaphragm in an embodiment of the sound generating device provided by the present invention;

[0055] Figure 12 Cross-sectional view of the diaphragm in an embodiment of the sound generating device provided by the present invention;

[0056] Figure 13 Structural diagram of the first yoke in the first embodiment of the sound generating device provided by the present invention;

[0057] Figure 14 Structural diagram of the first yoke in the second embodiment of the sound generating device provided by the present invention;

[0058] Figure 15 Structural diagram of the first yoke in the third embodiment of the sound generating device provided by the present invention;

[0059] Figure 16 Structural diagram of the first embodiment of the sound generating module provided by the present invention;

[0060] Figure 17 Structural diagram of the second embodiment of the sound generating module provided by the present invention;

[0061] Figure 18 Cross-sectional view of the second embodiment of the sound generating module provided by the present invention;

[0062] Figure 19 Structural diagram of the third embodiment of the sound generating module provided by the present invention;

[0063] Figure 20 Schematic diagram of the simulation effect of an embodiment of the sound generating device provided by the present invention.

[0064] Explanation of the reference numerals in the drawings:

[0065] 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 conductive plate; 35, Magnetic gap; 400, Module housing; 410, Sound outlet; 420, Rear cavity; 500, Sound generating module.

[0066] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0067] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0068] It should be noted that all the directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present invention are only used to explain the relative position 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.

[0069] 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.

[0070] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory 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.

[0071] The present invention provides a sound generating device 100. It can be understood that the sound generating device 100 is applied to an electronic device, and the electronic device may be a mobile phone, earphone, smart wearable device, etc., which is not limited herein.

[0072] Please refer to Figures 1 to 15As shown, in an embodiment of the present invention, the sound generating device 100 includes a first sound generating element 101 and a second sound generating element 102 arranged side by side in a first direction. Both the first sound generating element 101 and the second sound generating element 102 include a vibration system 2 and a magnetic circuit system 3. The two vibration systems 2 vibrate in a second direction perpendicular to the first direction. Each vibration system 2 includes a diaphragm assembly 21 and a voice coil 22. 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 vibrating plate 212. Each vibrating plate 212 includes a first plate portion 2121 and a second plate portion 2123 located on different horizontal planes in 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. 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 apart in a second direction. The first central magnet 331 and the second central magnet 332 are located on opposite sides of the corresponding second plate portion 2123 and are located inside the corresponding voice coil 22 in the projection along the second direction. 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 in the second direction and the magnetization directions are opposite. Wherein, the sound generating device 100 further includes a first magnetic yoke 31 and a second magnetic yoke 32 arranged opposite to each other in the second direction. The sides of the two first central magnets 331 facing away from the diaphragm assembly 21 are both connected to the first magnetic yoke 31. The sides of the two second central magnets 332 facing away from the diaphragm assembly 21 and the two side magnetic portions 34 are both connected to the second magnetic yoke 32. The first magnetic yoke 31 and the second magnetic yoke 32 are connected by welding.

[0073] In this embodiment, the sound generating device 100 can be a micro speaker. It can be understood that the first sound generating element 101 and the second sound generating element 102 of the sound generating device 100 are arranged side by side in the first direction. The first sound generating element 101 and the second sound generating element 102 of the sound generating device 100 can be connected and fixed through a housing or a bracket or a frame, or the first sound generating element 101 and the second sound generating element 102 of the sound generating device 100 can be installed in the module housing as a split structure in the first direction, which is not limited herein.

[0074] It can be understood that each of the first sound - generating monomer 101 and the second sound - generating monomer 102 of the sound - generating device 100 can be a monomer structure of a sound - generating device, which is not limited herein. Both the first sound - generating monomer 101 and the second sound - generating monomer 102 include a magnetic circuit system 3 and a vibration system 2. The voice coil 22 of each vibration system 2 is correspondingly arranged with the magnetic gap 35 of the corresponding magnetic circuit system 3. Thus, when an electric current is passed through each voice coil 22, each voice coil 22 makes a reciprocating motion in the magnetic field formed by each magnetic circuit system 3, drives each diaphragm assembly 21 to vibrate along the second direction, and further pushes the air to generate sound. That is, the diaphragm assemblies 21 of the first sound - generating monomer 101 and the second sound - generating monomer 102 both vibrate along the second direction, so that the sound - generating device 100 has two vibration systems 2 at the same time, improving the acoustic performance and listening effect of the whole machine. And the first sound - generating monomer 101 and the second sound - generating monomer 102 are arranged side by side along the first direction, forming two vibration systems 2 arranged side by side along the first direction, effectively reducing the thickness of the sound - generating device 100 in the Z - direction, so that the sound - generating device 100 can meet the spatial requirements of being thin, light, and miniaturized.

[0075] In this embodiment, the magnetic circuit systems 3 and the vibration systems 2 of the first sound - generating monomer 101 and the second sound - generating monomer 102 in the sound - generating device 100 are arranged oppositely. The magnetic circuit system 3 and the vibration system 2 can be installed and fixed through the housing 1, that is, the magnetic circuit system 3 and the vibration system 2 are fixed on the housing 1, making the first sound - generating monomer 101 or the second sound - generating monomer 102 an independent component, which is not limited herein. Of course, in other embodiments, the outer periphery of the diaphragm 211 in the vibration system 2 can be directly fixed to the magnetic circuit system 3; or, the magnetic circuit system 3 and the vibration system 2 can be a split structure, which is not limited herein.

[0076] It should be noted that the two magnetic circuit systems 3 and the two vibration systems 2 of the first sound - generating monomer 101 and the second sound - generating monomer 102 can be installed and fixed through a housing 1, making the first sound - generating monomer 101 and the second sound - generating monomer 102 integrated into a whole structure, which is not limited herein.

[0077] Optionally, the outer contour of the first sound - generating monomer 101 and the second sound - generating monomer 102 can be circular or square, so that the outer contours of the housing 1, the magnetic circuit system 3, and the vibration system 2 are correspondingly set to be circular or square, which is specifically designed according to actual needs and is not limited herein. In this embodiment, the housing 1 can be selected as a frame or a framework structure, that is, the housing 1 has a cavity with two open ends. The magnetic circuit system 3 is connected to the housing 1, and the vibration system 2 is connected to the housing 1 and is opposite and spaced from the magnetic circuit system 3. The housing 1 can be a steel - sheet structure or a plastic structure, which is not limited herein.

[0078] Optionally, the housing 1 can be an integral structure or formed by combining two separate 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 generating unit 101 and the second sound generating unit 102 to connect and conduct the two voice coils 22 to an external circuit through the conductive terminals.

[0079] In this embodiment, the magnetic circuit systems 3 of the first sound generating unit 101 and the second sound generating unit 102 both have magnetic gaps 35, that is, each magnetic circuit system 3 includes a central magnetic part 33 and a peripheral magnetic part 34, such that the peripheral magnetic part 34 is disposed outside the central magnetic part 33 and spaced from the central magnetic part 33 to form a magnetic gap 35. By setting each central magnetic part 33 as two central magnets that are opposite and spaced along the second direction, the two central magnets are located on opposite sides of the corresponding second plate part 2123. Specifically, the two central magnets include a first central magnet 331 and a second central magnet 332. The first central magnet 331 is close to the top of the voice coil 22, and the second central magnet 332 is close to the bottom of the voice coil 22. It should be noted that the top of the voice coil 22 is the end where the voice coil 22 is connected to the first plate part 2121, and the bottom of the voice coil 22 is the end where the voice coil 22 is suspended in the magnetic gap 35.

[0080] 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 current is passed through the two voice coils 22, each voice coil 22 drives a vibrating plate 212 to vibrate between the first central magnet 331 and the second central magnet 332, 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, in the present invention, the central magnetic parts 33 of the first sound generating monomer 101 and the second sound generating monomer 102 cancel 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 repel each other and are 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 is made 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.

[0081] Meanwhile, by setting the diaphragm 212 of the first sound generating unit 101 and the second sound generating unit 102 to 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, the first plate portion 2121 is connected to the top of the corresponding voice coil 22, and the first central magnet 331 and the second central magnet 332 of the central magnetic portion 33 in the first sound generating unit 101 and the second sound generating unit 102 are located on opposite sides of the corresponding second plate portion 2123, and the projection along the second direction is located inside the corresponding voice coil 22. One side of the first central magnet 331 and the second central magnet 332 facing the corresponding diaphragm assembly 21 is 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 and the second plate portion 2123 cooperate 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 unit 101.

[0082] Optionally, the voice coil 22 is an annular voice coil and extends along the second direction. In this way, the diaphragm 212 is set to the first plate portion 2121 and the second plate portion 2123 located on different horizontal planes along the second direction, so that the top of the voice coil 22 is connected to the first plate portion 2121, that is, the first plate portion 2121 is used to fix the voice coil 22 and the diaphragm 211. 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 be used to 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.

[0083] In this embodiment, as Figures 1 to 8 、 Figures 13 to 15As shown, the sound generating device 100 is provided with a first yoke 31 and a second yoke 32 that are oppositely arranged in the second direction. In this way, the first yoke 31 and the second yoke 32 can be used to respectively mount and fix 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. At the same time, the magnetic field lines of the first central magnet 331 and the second central magnet 332 are concentrated to form a magnetic circuit. As a result, the first sound generating monomer 101 and the second sound generating monomer 102 of the sound generating device 100 are integrated into a whole structure and are both mounted and fixed through the first yoke 31 and the second yoke 32.

[0084] It can be understood that one side of the first central magnet 331 of the first sound generating monomer 101 and the second sound generating monomer 102 facing away from the diaphragm assembly 21 is connected to the first yoke 31, and one side of the second central magnet 332 of the first sound generating monomer 101 and the second sound generating monomer 102 facing away from the diaphragm assembly 21 is connected to the second yoke 32.

[0085] Optionally, the projected area of the first yoke 31 in the second direction is greater than or equal to the projected area of the two first central magnets 331 in the second direction, and the projected area of the second yoke 32 in the second direction is greater than or equal to the projected area of the two second central magnets 332 in the second direction. In this way, not only can the first central magnet 331 and the second central magnet 332 be mounted and fixed, but also a magnetic concentrating effect is achieved. In this embodiment, the first yoke 31 and the second yoke 32 can be selected as a magnetic conductive plate structure.

[0086] 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. 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, so that 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. 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. One sides of the first central magnet 331 and the second central magnet 332 facing the corresponding diaphragm assemblies 21 are both exposed in the internal cavity of the sound generating device 100, and the first central magnet 331 and the second central magnet 332 are both magnetized in the second direction and the magnetization directions are opposite. 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 away from the magnetic gap 35, under the action of the first central magnet 331 and the second central magnet 332, the magnetic force received by the voice coil 22 will be increased, thereby increasing the volume and improving the sound quality, and thus improving the 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 located at different horizontal levels 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. Thus, during the movement of the diaphragm assembly 21, the cooperation between the voice coil 22 and the second plate portion 2123 respectively provides accommodation spaces for the first central magnet 331 and the second central magnet 332, so that the first central magnet 331 and the second central magnet 332 can be closer to the voice coil 22, achieving a magnetic field enhancement effect. In this way, it can effectively solve the problem that during the reciprocating movement of the voice coil 22, 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 there is no structure of the central washer, 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; further, the sound generating device 100 is provided with the first yoke 31 and the second yoke 32 arranged oppositely along the second direction, so as to install and fix the magnetic circuit system 3 and the vibration system 2 of the first sound generating unit 101 and the second sound generating unit 102 by using the first yoke 31 and the second yoke 32, and the first yoke 31 and the second yoke 32 are welded and connected, thereby improving the connection stability and enhancing the anti-drop performance of the sound generating device 100.

[0087] In an embodiment, each vibrating plate 212 further includes a third plate portion 2124. 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. The two ends of each third plate portion 2124 along the second direction are respectively connected to the corresponding first plate portion 2121 and the corresponding 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 of an integrally formed structure.

[0088] 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 of 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 formed by stamping.

[0089] 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 diaphragm 212 are connected to both ends of the third plate portion 2124 along the second direction, which 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 diaphragm 212 and the voice coil 22 by using the first plate portion 2121 and the third plate portion 2124.

[0090] 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.

[0091] 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 the voice coil 22 vibrates between the first central magnet 331 and the second central magnet 332. Optionally, the extension length of the third plate portion 2124 along the second direction is less than the extension length of the voice coil 22 along the second direction.

[0092] 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 attached 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.

[0093] In this embodiment, as Figures 3 to 7 、 Figure 9 、 Figure 10As shown, the first sound generating unit 101 and the second sound generating unit 102 have the diaphragm 212 arranged as a split structure, and at the same time, waterproof membranes 23 are provided. Each waterproof membrane 23 is provided with a first connecting portion 231, a second connecting portion 232, and a third connecting portion 233, such that the second connecting portion 232 of each waterproof membrane 23 is adhesively connected to the inner peripheral wall of the corresponding voice coil 22, and each first connecting portion 231 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 achieved, 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 membrane 23 and the diaphragm 212, enhancing the waterproof and sealing effect.

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

[0095] In this embodiment, the second connecting portion 232 and the third connecting portion 233 of each waterproof membrane 23 are optionally arranged perpendicular to each other, such 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 membrane 23 are respectively connected to both ends of the second connecting portion 232 in the second direction.

[0096] It can be understood that in order to prevent the second plate portion 2123 from colliding and interfering with the 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 membrane 23 in the second direction is less than the extension length of a voice coil 22 in the second direction.

[0097] 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.

[0098] Of course, in other embodiments, the inner periphery of each diaphragm 211 can 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 periphery 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 periphery 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 periphery 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.

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

[0100] 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.

[0101] 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 periphery of each diaphragm 211 is supported and overlapped on the corresponding stepped portion 2122.

[0102] 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 periphery of the corresponding diaphragm 211 is fixed by each second stepped portion 2122, and positioning and limiting of the inner periphery of the diaphragm 211 are achieved. At the same time, when the inner periphery of each diaphragm 211 supports and overlaps on the corresponding second stepped portion 2122, the inner periphery of the diaphragm 211 can be optionally flush with the first plate portion 2121, so that the matching structure of the first plate portion 2121 and the diaphragm 211 is more compact, reducing the occupied vibration space.

[0103] It can be understood that the second stepped portion 2122 is formed by recessing and bending the outer periphery of the first plate portion 2121 toward the voice coil 22, so that the second stepped portion 2122 and the inner periphery of the first plate portion 2121 form a limiting groove, and cooperate 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.

[0104] In one embodiment, along the second direction, the distance from the side of the second plate portion 2123 facing the first central magnet 331 to the first central magnet 331 is the same as the distance from the side of the second plate portion 2123 facing the second central magnet 332 to the second central magnet 332.

[0105] 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 avoid the collision interference between each second plate portion 2123 and the corresponding first central magnet 331 and the corresponding second central magnet 332. Optionally, the projection of each second plate portion 2123 along the first direction is located in the middle of the corresponding voice coil 22.

[0106] 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 of the centering washer is connected to the housing or the magnetic circuit system 3, so as to further center the voice coil 22 by using the centering washer and avoid polarization or swing of the voice coil 22 during the vibration process.

[0107] In one embodiment, the first yoke 31 is provided with a first recessed groove corresponding to each first central magnet 331, and each first central magnet 331 is disposed in a first recessed groove. It can be understood that by setting it in this way, the first recessed groove can be used to position and install the first central magnet 331, improving the installation stability. Moreover, the assembly height between the first central magnet 331 and the first yoke 31 can be reduced, increasing the vibration space of the diaphragm assembly 21.

[0108] In this embodiment, the first recessed groove may be formed by the side of the first yoke 31 facing the first central magnet 331, and at this time, the side of the first yoke 31 facing away from the first central magnet 331 is flat; alternatively, the first recessed groove may be formed by bending the first yoke 31 toward the side away from the first central magnet 331, and at this time, the side of the first yoke 31 facing away from the first central magnet 331 corresponding to the position of the first recessed groove is convexly provided, and no limitation is made here.

[0109] In one embodiment, the second yoke 32 is provided with a second recessed groove corresponding to each second central magnet 332, and each second central magnet 332 is disposed in a second recessed groove. It can be understood that by setting it in this way, the second recessed groove can be used to position and install the second central magnet 332, improving the installation stability. Moreover, the assembly height between the second central magnet 332 and the second yoke 32 can be reduced, increasing the vibration space of the diaphragm assembly 21.

[0110] In this embodiment, the second recessed groove may be formed by the side of the second yoke 32 facing the second central magnet 332, and at this time, the side of the second yoke 32 facing away from the second central magnet 332 is flat; alternatively, the second recessed groove may be formed by bending the second yoke 32 toward the side away from the second central magnet 332, and at this time, the side of the second yoke 32 facing away from the second central magnet 332 corresponding to the position of the second recessed groove is convexly provided, and no limitation is made here.

[0111] In one embodiment, each magnetic circuit system 3 further includes a side magnetic part 34 disposed on the second yoke 32, and 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.

[0112] In this embodiment, as Figures 3 to 8 shown, by disposing the side magnetic part 34 on the second yoke 32 and located outside the second central magnet 332, the side magnetic part 34 is spaced apart from the second central magnet 332 to form the magnetic gap 35. In this way, the magnetic field strength in the magnetic gap 35 can be effectively ensured.

[0113] It can be understood that the edge magnetic parts 34 of the first sounding monomer 101 and the second sounding monomer 102 not only form a magnetic circuit with the second central magnet 332 through the second magnetic yoke 32, so that the magnetic force lines in the magnetic gap 35 pass through the voice coil 22. At the same time, the edge magnetic part 34 also forms a magnetic circuit with the first central magnet 331 and the first magnetic yoke 31. When the voice coil 22 approaches the first central magnet 331, more magnetic force lines pass through the voice coil 22, thereby increasing the magnetic force received by the voice coil 22, effectively improving the BL value, making the distribution of magnetic force lines more uniform, and making the BLx curve flatter, thereby reducing distortion.

[0114] It should be noted that the edge magnetic part 34 can be an integral structure. For example, the edge magnetic part 34 is arranged in a ring shape and is disposed around the outside of the second central magnet 332. Of course, the edge magnetic part 34 can also be a split structure. At this time, the edge magnetic part 34 includes a plurality of parts, and the plurality of edge magnetic parts 34 are spaced apart and disposed around the outside of the second central magnet 332, which is not limited herein.

[0115] In this embodiment, as Figures 3 to 8 shown, each edge magnetic part 34 includes an edge magnet 341 and an edge magnetic conductive plate 342 arranged in a stacked manner. Each edge magnet 341 is connected to the second magnetic yoke 32, that is, both edge magnets 341 are connected to the second magnetic yoke 32. It can be understood that the edge magnet 341 and the edge magnetic conductive plate 342 of each edge magnet 341 are both 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.

[0116] Optionally, the structural contours of the edge magnet 341 and the edge magnetic conductive plate 342 of each edge magnetic part 34 are similar. That is, when the edge magnetic part 34 is an integral ring structure, both the edge magnet 341 and the edge magnetic conductive plate 342 are in an integral ring structure; or, when the edge magnetic part 34 is a split structure, both the edge magnet 341 and the edge magnetic conductive plate 342 are split structures and correspond one by one. Of course, in other embodiments, the structures of the edge magnet 341 and the edge magnetic conductive plate 342 of the edge magnetic part 34 can also be different. For example, one of the edge magnet 341 and the edge magnetic conductive plate 342 is an integral ring, and the other is a split structure, which is not limited herein.

[0117] In one embodiment, the projection of each edge magnetic conductive plate 342 in the first direction is located between the top of the corresponding voice coil 22 and the bottom of the corresponding voice coil 22.

[0118] In this embodiment, when the first sound emitting monomer 101 and the second sound emitting monomer 102 are not working, that is, when the voice coils 22 of the first sound emitting monomer 101 and the second sound emitting monomer 102 do not vibrate, the projection of each side magnetic plate 342 in the first direction is located between the top of the corresponding voice coil 22 and the bottom of the corresponding voice coil 22. In this way, it can be ensured that the voice coil 22 can reciprocally approach the first central magnet 331 or the second central magnet 332 during the vibration process, so as to ensure that the magnetic force received by the voice coil 22 when it moves to the side away from the magnetic gap 35 remains unchanged or the change amount is very small, and the magnetic field line distribution of the magnetic circuit system 3 is more uniform, and the BLx curve is flatter, thereby reducing distortion.

[0119] It should be noted that when the voice coils 22 of the first sound emitting monomer 101 and the second sound emitting monomer 102 are in a small amplitude situation, the projection of the side magnetic plate 342 in the first direction is located between the top of the voice coil 22 and the bottom of the voice coil 22. For the voice coil 22 in a small amplitude situation, only when the voice coil 22 does not vibrate, the projection of the side magnetic plate 342 in the first direction is located between the top of the voice coil 22 and the bottom of the voice coil 22, and no limitation is made here.

[0120] In an embodiment, the projection of each side magnetic 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.

[0121] In this embodiment, as Figures 4 to 8 shown, by arranging the projection of the side magnetic plate 342 of the side magnetic part 34 of the first sound emitting monomer 101 and the second sound emitting monomer 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 strength, effectively improving the BL value, making the magnetic field line distribution more uniform, and the BLx curve more flat, thereby reducing distortion.

[0122] 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 plate 342 in the first direction is located between the surfaces of the first central magnet 331 and the second central magnet 332 facing the diaphragm assembly 21. At the same time, it should be noted that the side magnet 341 needs to cooperate with the first central magnet 331 and the second central magnet 332 respectively to form corresponding magnetic circuits, and the above setting can also ensure that the side magnet 341 forms magnetic circuits with the first central magnet 331 and the second central magnet 332 with comparable magnetic field strengths.

[0123] Of course, in other embodiments, the second yoke 32 of the first sound emitting monomer 101 and the second sound emitting monomer 102 includes a bottom portion and a side portion (not shown in the figure) formed by bending and extending from the peripheral edge of the bottom portion toward the diaphragm assembly 21. The second central magnet 332 is disposed on the bottom portion and is spaced from the side portion to form a magnetic gap 35. It can be understood that by setting the second yoke 32 as a bottom portion and a side portion arranged at an angle, the side portion of the second yoke 32 is located outside the second central magnet 332 and is spaced from the second central magnet 332 to form a magnetic gap 35. The bottom portion and the side portion of the second yoke 32 can be an integrally formed structure, and the bottom portion and the side portion are perpendicularly arranged, which is not limited herein.

[0124] In one embodiment, the outer periphery of the first yoke 31 bends and extends toward the second yoke 32 to form a first welding portion 315, and the first welding portion 315 is welded to the second yoke 32. It can be understood that by welding the first welding portion 315 of the first yoke 31 to the second yoke 32, the connection stability is improved. In this way, when the sound emitting device 100 is applied to an electronic device and phenomena such as dropping occur, the structure of the sound emitting device 100 can be ensured to be stable.

[0125] 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 the first yoke 31, and the plurality of first welding portions 315 are all welded to the outer periphery of the second yoke 32, which is not limited herein.

[0126] In this embodiment, as Figures 1 to 6 、 Figures 13 to 15 shown, the first yoke 31 includes a top plate portion 311 and a side plate portion 312 arranged at an angle, and a part of the side plate portion 312 extends toward the second 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 yoke 31 are an integrally formed structure, which is not limited herein.

[0127] In one embodiment, the outer periphery of the second yoke 32 bends and extends toward 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 by welding the second welding portion of the second yoke 32 to the first yoke 31, the connection stability is improved. In this way, when the sound emitting device 100 is applied to an electronic device and phenomena such as dropping occur, the structure of the sound emitting device 100 can be ensured to be stable.

[0128] Optionally, there are a plurality of second welding portions, and the plurality of second welding portions are spaced apart on the outer periphery of the second yoke 32, and the plurality of second welding portions are all welded to the outer periphery of the first yoke 31, which is not limited herein.

[0129] In this embodiment, the second yoke 32 includes a top wall and a side wall arranged at an angle, and a part of the side wall extends towards the first yoke 31 to form a second welding portion. Optionally, the top wall, the side wall and the second welding portion of the second yoke 32 are of an integrally formed structure, which is not limited herein.

[0130] In one embodiment, the first sound emitting monomer 101 and the second sound emitting monomer 102 further include a housing 1 respectively. Each housing 1 is connected to the first yoke 31 and the second yoke 32 respectively and is located between the first yoke 31 and the second yoke 32. The first yoke 31 at least includes a top plate portion 311 located on the side of the diaphragm assembly 21 facing away from the second yoke 32. The two first central magnets 331 are both arranged on the 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 top plate portion 311.

[0131] In this embodiment, the magnetic circuit system 3 and the vibration system 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.

[0132] 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.

[0133] 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 yoke 31 and the second yoke 32 along the second direction. The first yoke 31 is connected to the housing 1, and the second yoke 32 can be connected to the housing 1 directly or indirectly, which is not limited herein.

[0134] It can be understood that the first yoke 31 at least includes a top plate portion 311 located on the side of the diaphragm assembly 21 facing away from the second yoke 32, so as to install and fix the two first central magnets 331 by using the top plate portion 311. In this way, the outer periphery of the diaphragm 211 is connected to one end of the housing 1 away from the second yoke 32, so that the diaphragm 211 is opposite to and spaced from the top plate portion 311, so as to ensure the vibration of the diaphragm 211.

[0135] It should be noted that the top plate portion 311 of the first yoke 31 can be one or two. When the top plate portion 311 is one, the two first central magnets 331 are both fixed to one top plate portion 311; when the top plate portion 311 is two, the two first central magnets 331 are respectively fixed to the two top plate portions 311, which is not limited herein.

[0136] In this embodiment, the first yoke 31 may be a flat structure. At this time, the first yoke 31 is formed into a top plate portion 311, and the first yoke 31 and the housing 1 may be an integrally formed structure. Optionally, each housing 1 is a plastic housing, and the two housings 1 are an integrally formed structure and are arranged along the first direction. The housing 1 and the first yoke 31 are integrally injection molded. Of course, in other embodiments, the first yoke 31 and the housing 1 may also be connected by welding or bonding, which is not limited herein.

[0137] It can be understood that each housing 1 may be a frame structure or a framework with openings at both ends. At this time, the first yoke 31 is connected to the same end of the two housings 1, and the second yoke 32 is located at the end of the two housings 1 away from the first yoke 31. Of course, in other embodiments, the housing 1 includes a flat portion and a vertical portion arranged at an angle, and the flat portion is provided with an installation opening. The first yoke 31 covers the two installation openings, and the second yoke 32 is located on the side of the vertical portions of the two housings 1 facing away from the flat portion, which is not limited herein.

[0138] In one embodiment, the first yoke 31 further includes a side plate portion 312 arranged at an angle with 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 support platform 313.

[0139] In this embodiment, as Figures 1 to 6 、 Figures 13 to 15 shown, by setting the first yoke 31 as the top plate portion 311 and the side plate portion 312 arranged at an angle, and providing the 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. Moreover, the support platform 313 can position the outer periphery of the diaphragm 211 away from the top plate portion 311, so as to ensure the vibration of the diaphragm 211.

[0140] It can be understood that the side plate portion 312 of the first yoke 31 and the housing 1 may be integrally formed. Optionally, each housing 1 is a plastic housing, and the two housings 1 are an integrally formed structure and are arranged along the first direction. The housing 1 and the side plate portion 312 of 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 may be connected by welding or bonding, which is not limited herein.

[0141] Of course, in other embodiments, the outer periphery of the diaphragm 211 may also be fixed to the inner wall of the housing 1. For example, the inner wall of the housing 1 is convexly provided with a support platform or other structures, and the outer periphery of the diaphragm 211 is fixed to the support platform or other structures, which is not limited herein.

[0142] In one embodiment, each side magnetic part 34 includes a side magnet 341 and a side magnetic conductive plate 342 which are stacked. Each side magnet 341 is connected to the second magnetic yoke 32, and each side magnetic conductive plate 342 is connected to the corresponding housing 1; wherein, each side magnetic conductive plate 342 and the corresponding housing 1 are of an integrally formed structure.

[0143] In this embodiment, as Figures 3 to 5 shown, the side magnetic part 34 of each magnetic circuit system 3 is provided on the second magnetic yoke 32, and the second magnetic yoke 32 can be connected to the housing 1 through the side magnetic part 34. Optionally, the side magnetic conductive plate 342 of the side magnetic part 34 and the housing 1 can be of an integrally formed structure. For example, the housing 1 is a plastic shell, and the housing 1 and the side magnetic conductive plate 342 are integrally injection molded; or, the housing 1 is a metal shell, and at this time the housing 1 and the side magnetic conductive plate 342 are integrally drawn, which is not limited herein. Of course, in other embodiments, the housing 1 and the side magnetic conductive plate 342 can also be connected by welding or bonding, which is not limited herein.

[0144] It should be noted that the housing 1 is used not only to fix the diaphragm 211 of the magnetic circuit system 3 and the vibration system 2, but also to support the first 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.

[0145] In one embodiment, a first cavity 11 is formed between the first magnetic yoke 31 and each diaphragm assembly 21. Each first central magnet 331 is located in the corresponding first cavity 11. The first sound emitting unit 101 and the second sound emitting unit 102 are both provided with sound outlet holes 314 communicating the two first cavities 11.

[0146] In this embodiment, as Figure 4 、 Figure 5 shown, a first cavity 11 is formed between the first magnetic yoke 31 and the diaphragm assemblies 21 of the first sound emitting unit 101 and the second sound emitting unit 102. The first cavity 11 is used to provide a vibration space for the diaphragm 211 and at the same time provide an installation space for the first central magnet 331. It can be understood that in order to enable the diaphragm 211 to emit sound smoothly during vibration, the first sound emitting unit 101 / second sound emitting unit 102 is also provided with sound outlet holes 314 communicating the first cavity 11.

[0147] It should be noted that the first cavities 11 of the first sound emitting unit 101 and the second sound emitting unit 102 can be optionally arranged to be isolated from each other, so as to ensure that the diaphragms 211 of the first sound emitting unit 101 and the second sound emitting unit 102 emit sound smoothly during vibration and avoid acoustic interference between each other.

[0148] It can be understood that the two sound outlet holes 314 are respectively provided on the corresponding housing 1; or, as Figure 1 、 Figure 3 、 Figure 5 、Figure 6 , Figures 13 to 15 As shown, the two sound outlets 314 are respectively provided on the first yoke 31; alternatively, the two sound outlets 314 are respectively provided at the connection between the corresponding housing 1 and the first yoke 31, which is not limited herein.

[0149] In one embodiment, the first yoke 31 includes a top plate portion 311 and a side plate portion 312 arranged at an angle. Optionally, as Figure 14 shown, the two sound outlets 314 are both provided on the 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 outlets 314 are provided on the side plate portion 312; or, as Figure 15 shown, one sound outlet 314 is provided on the top plate portion 311 and the other sound outlet 314 is provided on the side plate portion 312, which is not limited herein.

[0150] It can be understood that when the sound outlets 314 of the first sound emitting unit 101 and the second sound emitting unit 102 are both provided on the top plate portion 311 and are opposite to the diaphragm 211, when the sound emitting device 100 is applied to an electronic device or a sound emitting module, at this time, a sound outlet is provided on the housing of the electronic device or the sound emitting module and is directly opposite to the sound outlets 314 of the first sound emitting unit 101 and the second sound emitting unit 102, so that the electronic device or the sound emitting module has a front sound emitting structure. Or, the sound outlet on the housing of the electronic device or the sound emitting module is located on one side of the sound emitting device 100, so that the sound outlet is communicated with the sound outlets 314 of the first sound emitting unit 101 and the second sound emitting unit 102 through a sound channel, thereby making the electronic device or the sound emitting module have a side sound emitting structure.

[0151] Of course, in other embodiments, when the sound outlets 314 of the first sound emitting unit 101 and the second sound emitting unit 102 are provided on the side plate portion 312, when the sound emitting device 100 is applied to an electronic device or a sound emitting module, at this time, when the sound outlet on the housing of the electronic device or the sound emitting module is directly opposite to the diaphragms 211 of the first sound emitting unit 101 and the second sound emitting unit 102, the sound outlet is communicated with the sound outlets 314 through a sound channel, so that the electronic device or the sound emitting module has a front sound emitting structure. Or, the sound outlet on the housing of the electronic device or the sound emitting module is located on one side of the sound emitting device 100, and the sound outlet is correspondingly communicated with the sound outlets 314 of the first sound emitting unit 101 and the second sound emitting unit 102, thereby making the electronic device or the sound emitting module have a side sound emitting structure.

[0152] Alternatively, one of the sound outlet holes 314 of the first sound generating unit 101 and the second sound generating unit 102 is provided on the top plate portion 311 of the first yoke 31, and the other sound outlet hole 314 is provided on the side plate portion 312 of the first yoke 31. When the sound generating device 100 is applied to an electronic device or a sound generating module, two sound outlet openings are provided on the housing of the electronic device or the sound generating module at this time, and the two sound outlet openings are respectively arranged opposite to the two sound outlet holes 314. At this time, the first sound generating unit 101 and the second sound generating unit 102 of the sound generating device 100 are in a front and side arrangement (that is, one is a front sound output structure and the other is a side sound output structure), which is not limited herein.

[0153] In an 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 each first central magnet 331 is greater than the magnetic energy product of the corresponding second central magnet 332. It can be understood that by setting like this, the magnetic field strength of the first central magnet 331 can be ensured to be greater than the magnetic field strength of the second central magnet 332.

[0154] In this embodiment, each side magnetic portion 34 is located outside a second central magnet 332, so that the magnetic field strength in the magnetic gap 3534 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 the magnetic energy product of the second central magnet 332, the magnetic field strengths at both ends of the voice coil 22 can be balanced in this way, and the flatness of the BLx curve can be further improved, thereby reducing distortion.

[0155] Optionally, the volume of each first central magnet 331 is greater than the volume of the corresponding second central magnet 332. When the grades of the first central magnet 331 and the second central magnet 332 are the same, the magnetic field strength of the first central magnet 331 can be ensured to be greater than the magnetic field strength of the second central magnet 332 in this way. In this embodiment, as Figures 3 to 5 shown, the outer contours of each first central magnet 331 and the corresponding second central magnet 332 are the same, and the thickness of each first central magnet 331 in the second direction is greater than the thickness of the corresponding second central magnet 332 in the second direction. Thereby, the magnetic field strength of the first central magnet 331 is greater than the magnetic field strength of the second central magnet 332.

[0156] In an embodiment, the side magnetic portion 34 includes a shared side magnetic portion, and the shared side magnetic portion is located between the two central magnetic portions 33, and the shared side magnetic portion cooperates with the two central magnetic portions 33 to form corresponding magnetic gaps 35 respectively.

[0157] In this embodiment, as Figure 3 and Figure 4As shown, the two central magnetic parts 33 of the first sound generating unit 101 and the second sound generating unit 102 are arranged at intervals 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.

[0158] In this embodiment, the side magnetic parts 34 of the first sound generating unit 101 and the second sound generating unit 102 are arranged outside the central magnetic parts 33. The side magnetic parts 34 can be an integral annular structure. At this time, the two side magnetic parts 34 can be selected as an integral molding structure and extend and arrange along the first direction. The integrally formed side magnetic part 34 is provided with a receiving space corresponding to each central magnetic part 33, and each central magnetic part 33 is located in each receiving space, which is not limited herein; or, the side magnetic parts 34 of the first sound generating unit 101 and the second sound generating unit 102 can also be separately arranged, such as Figure 3 and Figure 4 As shown, at this time, a part of the 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.

[0159] In one embodiment, the two vibrating membranes 211 are of an integral molding structure and are arranged along the first direction. In this embodiment, as Figure 3 shown, the two vibrating membranes 211 of the first sound generating unit 101 and the second sound generating unit 102 can be selected as an integral molding structure and are arranged along the first direction.

[0160] In one embodiment, the two vibrating membrane assemblies 21 jointly radiate sound waves outward on the same side of the sound generating device 100. It can be understood that the two vibrating membrane 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, and improve the loudness of the sound generating device 100.

[0161] Optionally, the two vibrating membrane assemblies 21 of the first sound generating unit 101 and the second sound generating unit 102 simultaneously radiate sound waves with the same phase outward. In this embodiment, the two vibrating membrane assemblies 21 can be selected to vibrate in the same direction. The two vibrating membrane 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.

[0162] Optionally, the two vibrating membrane assemblies 21 of the first sound generating unit 101 and the second sound generating unit 102 simultaneously radiate sound waves with opposite phases outward. In this embodiment, the two vibrating membrane assemblies 21 of the first sound generating unit 101 and the second sound generating unit 102 can be selected to vibrate in the opposite direction. In this way, the two vibrating membrane assemblies 21 of the first sound generating unit 101 and the second sound generating unit 102 are both communicated with the external environment, and the two vibrating membrane 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.

[0163] It should be noted that in the sound generating device 100, the first sound generating element 101 and the second sound generating element 102 form two vibration systems 2. The two vibration systems 2 of the sound generating device 100 can be independent of each other and have no influence on each other, and the structural design can be exactly the same, thus simplifying the debugging of the whole machine.

[0164] As Figures 16 to 19 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 at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, and will not be elaborated herein one by one.

[0165] In an embodiment, there is a module housing 400 which is provided with a receiving cavity. The sound generating device 100 is disposed in the receiving cavity and divides the receiving cavity into a front cavity and a rear cavity 420; wherein, the module housing 400 is provided with a sound outlet 410 communicating with the front cavity.

[0166] 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.

[0167] 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.

[0168] In this embodiment, the sound generating device 100 is disposed in the receiving cavity and divides the receiving cavity into a front cavity and a rear cavity 420. At this time, the 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 disposed on the module upper shell or at the connection of the module upper shell and the module lower shell.

[0169] 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 disposed 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.

[0170] It can be understood that the upper housing of the module includes a top wall and a first side wall, and the lower housing of the module includes a bottom wall and a second side wall. The first side wall and the second side wall together form the side wall of the module housing 400 of the sound generating module 500, that is, the module housing 400 includes a top wall and a bottom wall arranged oppositely 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 any limitations here.

[0171] In this embodiment, as Figures 16 to 19 shown, a first opening is provided on the top wall of the upper housing of the module, and a second opening is provided on the bottom wall of the lower housing of the module. When the sound generating device 100 is installed in the module housing 400, the first yoke 31 of the sound generating device 100 corresponds to or is located at the first opening, and the second yoke 32 of the sound generating device 100 corresponds to or is located at the second opening. It can be understood that the first opening can be the sound outlet 410; or, the first opening is only used for installing the sound generating device 100 to reduce the thickness of the sound generating module 500 in the Z direction, and no limitation is made here.

[0172] 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.

[0173] Optionally, there is one sound outlet 410 for the sound generating module 500.

[0174] 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 to 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.

[0175] 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 is located on one side of the periphery of the two diaphragm assemblies 21. At this time, the sound generating module 500 has a side sound output structure.

[0176] Optionally, the sound outlet 410 is disposed opposite to and in communication with the two sound holes 314 of the sound generating device 100; alternatively, 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 no limitation is made herein.

[0177] Optionally, the module housing 400 is provided with two sound outlets 410.

[0178] 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.

[0179] 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.

[0180] 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.

[0181] It can be understood that in this way, some of the sound generating monomers of the sound generating device 100 in the module housing 400 have a front sound output structure, and some have a side sound output structure, realizing the cooperation of the front sound output structure + the side sound output structure, which can adapt to various assembly modes of the whole machine and improve the degree of freedom.

[0182] 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.

[0183] 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.

[0184] Optionally, the above-mentioned electronic device may be a mobile phone, an earphone, a computer, a PAD, a smart wearable device, etc., and the present invention does not make specific limitations thereto.

[0185] 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 any direct / indirect application 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 unit and a second sound generating unit arranged side by side in a first direction. Both the first sound generating unit and the second sound generating unit 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 vibrating plate. Each vibrating plate includes a first plate portion and a second plate portion located on different horizontal planes in the second direction. 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 arranged opposite to and spaced apart from each other in a second direction. The first central magnet and the second central magnet are located on opposite sides of the corresponding second plate portion and are located inside the corresponding voice coil in the projection in the second direction. One side of the first central magnet and the second central magnet facing the diaphragm assembly is exposed in the internal cavity of the sound generating device. The first central magnet and the second central magnet are both magnetized in the second direction and the magnetization directions are opposite; Wherein, the sound generating device further includes a first magnetic yoke and a second magnetic yoke arranged opposite to each other in the second direction. One side of each of the two first central magnets facing away from the diaphragm assembly is connected to the first magnetic yoke. One side of each of the two second central magnets facing away from the diaphragm assembly and the two side magnetic portions are all connected to the second magnetic yoke. The first magnetic yoke and the second magnetic yoke are connected by welding.

2. The sound generating device according to claim 1, wherein, Each vibrating plate further includes a third plate portion. Each third plate portion is located inside the corresponding voice coil and is adhesively connected to the inner peripheral wall of the corresponding voice coil. Both ends of each third plate portion in the second direction are respectively connected to the corresponding first plate portion and the corresponding second plate portion; Wherein, the first plate portion, the third plate portion and the second plate portion of each vibrating 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 at the top of a 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. 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 of the second plate portions is disposed on a 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 second connecting portion in the second direction is less than the extension length of a voice coil in the second direction; And / or, the first connecting portion and the third connecting portion of each waterproof film are respectively connected to two ends of the second connecting portion in the second direction.

5. The sound generating device according to claim 1, characterized in that, The outer periphery of each first plate portion is recessed and bent toward 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 the side of the second plate portion facing the first central magnet to the first central magnet is the same as the distance from the side of the second plate portion facing the second central magnet to the second central magnet.

6. The sound generating device according to claim 1, wherein, The outer periphery of the first magnetic yoke is bent and extended toward 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 the second magnetic yoke is bent and extended toward the first magnetic yoke to form a second welding portion, and the second welding portion is welded to the first magnetic yoke.

7. The sound generating device according to claim 1, wherein The first sound generating unit and the second sound generating unit both further include a housing, each housing is respectively connected to the first magnetic yoke and the second magnetic yoke, and is located between the first magnetic yoke and the second magnetic yoke. The first magnetic yoke at least includes a top plate portion located on a side of the diaphragm assembly facing away from the second magnetic yoke, and two of the first central magnets are both disposed on the top plate portion. The outer periphery of each diaphragm is connected to an end of the corresponding housing away from the second magnetic yoke, and each diaphragm is opposite to and spaced from the top plate portion.

8. The sound generating device according to claim 7, characterized in that, The first magnetic yoke further includes a side plate portion disposed at an angle with the top plate portion. The side plate portion is bent toward the diaphragm assembly to form a support platform, and the outer periphery of each diaphragm is clamped between the corresponding housing and the support platform; And / or, each housing is a plastic housing, and two of the housings are of an integrally formed structure and are arranged along the first direction. The housing and the first magnetic yoke are integrally injection molded; And / or, each side magnetic portion includes a side magnet and a side magnetic conductive plate stacked. Each side magnet is connected to the 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.

9. The sound generating device according to claim 7, wherein A first cavity is formed between the first magnetic yoke and each diaphragm assembly, and each of the first central magnets 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 the two first cavities; Wherein, the two sound outlet holes are both disposed on the housing; Alternatively, the first yoke includes a top plate portion and a side plate portion arranged at an angle, and the two sound outlets are both provided on the top plate portion and are opposite to the corresponding diaphragms; or, the two sound outlets are provided on the side plate portion; or, one sound outlet is provided on the top plate portion and the other sound outlet is provided on the side plate portion; Alternatively, the two sound outlets are both provided at the connection between the housing and the first yoke.

10. The sound generating device according to claim 1, characterized in that, Each side magnetic portion includes a side magnet and a side magnetic conductive plate stacked, and the two side magnets are both connected to the second yoke. Each side magnet is located outside the corresponding second central magnet and is spaced from the corresponding second central magnet to form a magnetic gap; wherein, the projection of each side magnetic conductive plate in the first direction is located between the top and the bottom of the corresponding voice coil; and / or, the projection of each side magnetic conductive plate in the first direction is located between the surfaces of the first central magnet and the second central magnet facing the diaphragm assembly; and / or, the thickness of each side magnet in the second direction is greater than the thickness of the corresponding second central magnet in the second direction; and / or, each first central magnet is close to the top of the corresponding voice coil, and each second central magnet is close to the bottom of the corresponding voice coil; wherein, the magnetic energy product of each first central magnet is greater than the magnetic energy product of the corresponding second central magnet; or, the volume of each first central magnet is greater than the volume of the corresponding second central magnet; or, each first central magnet has the same outer contour as the corresponding second central magnet, and the thickness of each first central magnet in the second direction is greater than the thickness of the corresponding second central magnet in the second direction; and / or, the side magnetic portion includes a shared side magnetic portion located between the two central magnetic portions, and the shared side magnetic portion cooperates with the two central magnetic portions respectively to form the corresponding magnetic gaps.

11. The sound generating device according to any one of claims 1 to 10, 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.

12. A sound generating module, characterized in that, The sound generating module includes: a module housing provided with an accommodation cavity; and a sound generating device according to any one of claims 1 to 11, the sound generating device being provided in the accommodation cavity and dividing the accommodation cavity into a front cavity and a rear cavity; wherein, the module housing is provided with a sound outlet communicating with the front cavity.

13. The sound generating module according to claim 12, wherein The sound outlet is arranged opposite to the two diaphragm assemblies of the sound generating device, so that the sound generating module has a front sound output structure; Alternatively, the module housing is provided with two of the sound outlets; wherein, the two sound outlets are both disposed on the same side of the module housing, and each of the sound outlets is disposed opposite to a diaphragm assembly of the sound generating device, so that the sound generating module has a front sound output structure; or, the two sound outlets are both 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 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.

14. An electronic device, characterized in that, The electronic device includes the sound generating module as claimed in claim 12 or 13. Alternatively, the electronic device includes the sound generating device as claimed in any one of claims 1 to 11.

Images