Sound production device and sound production module

Abstract

The invention discloses a sound production device and a sound production module, and relates to the technical field of electroacoustic transduction, a central magnetic part of a magnetic circuit system of the sound production device comprises a first central magnet, a central magnetic conductive plate and a second central magnet which are stacked, and the magnetizing directions of the first central magnet and the second central magnet are opposite; a receding space is formed between every two adjacent side magnetic parts, the inner side of an inner folding ring of a first vibrating diaphragm assembly of the vibrating system is connected with the center magnetic part, a diaphragm and a second vibrating diaphragm assembly are sequentially arranged on the side, facing the magnetic conductive yoke, of the first vibrating diaphragm assembly, and a sound production cavity communicated with a sound production hole of the shell is formed between the diaphragm and the second vibrating diaphragm assembly. The first extension part of the second diaphragm assembly is correspondingly connected with the second extension part of the diaphragm and extends to the avoiding space, the rigid connecting piece is arranged in the avoiding space, the rigid connecting part of the rigid connecting piece is connected with the first extension part, and the fourth extension part of the rigid connecting piece is connected with the voice coil. According to the sound production device, the effective vibration area of the vibration system is increased, and the acoustic performance is improved.

Description

Technical Field

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

[0002] In recent years, with the rapid development of consumer electronic products, people's requirements for electronic products have been continuously improved, such as portability and comfort. The sound device is an important electroacoustic transducer component in consumer electronic products, which is widely used as speakers, receivers, headphones, etc. With the improvement of the performance of electronic products, the improvement of the acoustic performance of the sound device is also an inevitable trend.

[0003] The sound-generating device drives the diaphragm in the vibration system to vibrate through the magnetic circuit system, repeatedly pushing the air to achieve sound. The diaphragm, as the core component of the sound-generating device, directly affects the acoustic performance of the sound-generating device. Among them, the effective vibration area (Sd) of the diaphragm is one of the important factors affecting the acoustic performance of the sound-generating device. The larger the effective vibration area of ​​the diaphragm, the better the acoustic performance of the sound-generating device. However, in the related art, the effective vibration area of ​​the diaphragm of the sound-generating device is small, which affects the acoustic performance of the sound-generating device. Summary of the invention

[0004] The main purpose of the present invention is to provide a sound-emitting device and a sound-emitting module, aiming to provide a sound-emitting device with an increased effective vibration area. Compared with conventional speakers, the sound-emitting device increases the effective vibration area under the same amplitude conditions, improves the performance of the sound-emitting device, and under the same performance conditions, achieves a lighter and thinner product size.

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

[0006] A housing, wherein the housing is provided with a sound outlet hole;

[0007] A magnetic circuit system, the magnetic circuit system is connected to the housing, the magnetic circuit system includes a magnetic yoke and a central magnetic portion and a side magnetic portion provided on the magnetic yoke, the side magnetic portion is located outside the central magnetic portion and forms a magnetic gap with the central magnetic portion, the central magnetic portion includes a first central magnet, a central magnetic plate and a second central magnet arranged in a stacked manner, the first central magnet is connected to the magnetic yoke, the side magnetic portion includes a plurality of side magnetic portions, and an escape space is formed between two adjacent side magnetic portions; and

[0008] A vibration system, the vibration system comprising a first diaphragm assembly, a second diaphragm assembly, a voice coil, a diaphragm and a rigid connector, the first diaphragm assembly comprising an inner folding ring, a first vibration plate and an outer folding ring connected in sequence, the inner side of the inner folding ring being connected to the second central magnet, the outer periphery of the outer folding ring being connected to the housing, one end of the voice coil being connected to the first diaphragm assembly, the other end of the voice coil being suspended in the magnetic gap, the diaphragm and the second diaphragm assembly being arranged in sequence on the side of the first diaphragm assembly facing the magnetic yoke and being located on the outside of the voice coil, the outer edges of the diaphragm and the second diaphragm assembly being connected to the housing, the inner edge of the diaphragm being connected to the inner edge of the second diaphragm assembly, so as to form a sound cavity connected to the sound outlet between the diaphragm and the second diaphragm assembly, the second diaphragm assembly having a first extension portion extending to the avoidance space, the diaphragm having a second extension portion extending to the avoidance space, the second extension portion being correspondingly connected to the first extension portion;

[0009] Wherein, the first center magnet and the second center magnet are both magnetized along the vibration direction of the vibration system and the magnetization directions are opposite, the rigid connecting member is arranged in the avoidance space, and the rigid connecting member includes a rigid connecting portion and a fourth extending portion extending from the rigid connecting portion toward the voice coil, the rigid connecting portion is connected to the first extending portion, and the fourth extending portion is connected to the voice coil.

[0010] In one embodiment, the second diaphragm assembly includes a folding ring portion and a second vibration plate, the outer periphery of the folding ring portion is connected to the housing, the second vibration plate includes a main body portion connected to the inner edge of the folding ring portion and a first bent portion formed by the main body portion bending and extending toward the diaphragm, and the first bent portion is connected to the inner edge of the diaphragm;

[0011] Wherein, a side of the main body away from the folding ring portion extends toward the avoidance space to form the first extension portion.

[0012] In one embodiment, an inclined portion is formed at the connection between the main body and the first bending portion, and the inclined portion is arranged at an angle with the vibration direction of the vibration system;

[0013] And / or, the outer periphery of the folded ring portion is bent to form a first flange, and the first flange is connected to the outer wall of the shell.

[0014] In one embodiment, the diaphragm is a flexible member, and the diaphragm includes an outer connecting portion, a deformable portion, and an inner connecting portion connected in sequence, the outer periphery of the outer connecting portion is connected to the outer shell, the inner edge of the inner connecting portion is connected to the first bending portion, and the deformable portion is in a bending shape;

[0015] Wherein, the inner connecting portion corresponds to the first extending portion and extends toward the avoidance space to form the second extending portion.

[0016] In one embodiment, the inner edge of the inner connecting portion is bent and extended toward the first bending portion to form a second flange, and the second flange is connected to the first bending portion;

[0017] And / or, along the vibration direction of the vibration system, the projection width L1 of the deformation portion is greater than or equal to the projection width L2 of the folding ring portion, and the ratio of L1 to L2 is 1:1 to 3:1;

[0018] And / or, the deformation portion protrudes in a direction away from the first diaphragm assembly, the folding ring portion protrudes in a direction close to the first diaphragm assembly, and the deformation portion and the folding ring portion are staggered in a direction perpendicular to the vibration system;

[0019] And / or, the inner fold ring and the outer fold ring both protrude in a direction away from the magnetic circuit system;

[0020] And / or, the compliance of the diaphragm is greater than the compliance of the folding ring portion.

[0021] In one embodiment, the effective vibration area Sd1 of the diaphragm is smaller than the effective vibration area Sd2 of the second diaphragm assembly, and the ratio of Sd1 to Sd2 is 1:1.5 to 1:3.

[0022] In one embodiment, the vibration system further comprises a centering support plate, the centering support plate comprises an external fixing portion, an internal fixing portion and a vibration arm connecting the external fixing portion and the internal fixing portion, the external fixing portion is connected to the housing, and the rigid connecting member is provided at the internal fixing portion;

[0023] The second diaphragm assembly comprises a folding ring portion and a second vibration plate connected to each other, the outer periphery of the folding ring portion is connected to the housing, and the inner edge of the second vibration plate is connected to the inner edge of the diaphragm;

[0024] The inner fixing portion is connected to the second vibration plate and the voice coil, and is electrically connected to the lead wire of the voice coil.

[0025] In one embodiment, the outer shell includes a first shell and a second shell, the first shell is provided with the sound outlet hole, the outer periphery of the outer folding ring and the outer periphery of the diaphragm are connected to the first shell, the magnetic yoke is connected to the second shell, and the outer periphery of the second diaphragm assembly is clamped between the first shell and the second shell.

[0026] In one embodiment, the side magnetic portion includes stacked side magnets and side magnetic conductive plates, the side magnets are connected to the magnetic conductive yoke, the side magnetic conductive plates are arranged opposite to the center magnetic conductive plate, and the magnetization direction of the side magnets is opposite to the magnetization direction of the first center magnet.

[0027] The present invention further provides a sound module, the sound module comprising:

[0028] A module housing, wherein the module housing is provided with a mounting cavity and a sound outlet communicating with the mounting cavity; and

[0029] The sound-generating device described above is arranged in the installation cavity, a front sound cavity is formed between the first diaphragm assembly of the sound-generating device and the module housing, and the front sound cavity is connected to the sound outlet;

[0030] Among them, the sound cavity of the sound-emitting device is connected with the sound outlet through the front sound cavity; or, the module shell is also provided with a sound outlet channel, and the sound cavity of the sound-emitting device is connected with the sound outlet through the sound outlet channel; or, the sound outlet hole of the sound-emitting device is connected directly with the sound outlet.

[0031] The sound-generating device of the technical solution of the present invention is achieved by accommodating a magnetic circuit system and a vibration system in a shell, and arranging the magnetic circuit system as a magnetic yoke and a central magnetic part and a side magnetic part arranged on the magnetic yoke, so that the side magnetic part is located on the outside of the central magnetic part and is surrounded with the central magnetic part to form a magnetic gap, and arranging a first diaphragm assembly, a second diaphragm assembly, a voice coil, a diaphragm and a rigid connector in the vibration system, so that the inner side of the inner folding ring of the first diaphragm assembly is connected to the central magnetic part, the outer periphery of the outer folding ring is connected to the shell, one end of the voice coil is connected to the first diaphragm assembly, and the other end of the voice coil is suspended in the magnetic gap, so that current is passed through the voice coil, so that the voice coil converts electrical energy into mechanical energy in the magnetic gap formed by the magnetic circuit system, so as to drive the voice coil to drive The first diaphragm assembly vibrates to achieve sound generation, and the central magnetic part is arranged as a counter-magnetic structure, that is, the central magnetic part includes a first central magnet, a central magnetic conductive plate and a second central magnet which are stacked, and the first central magnet and the second central magnet are magnetized along the vibration direction of the vibration system and the magnetization directions are opposite, so that the magnetic field strength of the magnetic circuit system of the sound-generating device can be improved, and the performance of the sound-generating device as a whole can be improved; at the same time, the diaphragm and the second diaphragm assembly are arranged in sequence on the side of the first diaphragm assembly facing the magnetic conductive yoke, and are located on the outside of the voice coil, so that the outer edges of the diaphragm and the second diaphragm assembly are connected to the outer shell, and the inner edge of the diaphragm is connected to the inner edge of the second diaphragm assembly, so as to form a sound-generating cavity between the diaphragm and the second diaphragm assembly, and The shell is provided with a sound outlet hole, so that the sound cavity is connected with the sound outlet hole, and one end of the rigid connector is connected to the second diaphragm assembly, and the other end of the rigid connector is connected to the voice coil, so that the voice coil drives the second diaphragm assembly to vibrate through the rigid connector. In this way, a diaphragm and a second diaphragm assembly are added to the conventional speaker. When the sound device is working, the voice coil drives the second diaphragm assembly to vibrate through the rigid connector, so that the volume between the diaphragm and the second diaphragm assembly changes relatively to promote the air in the sound cavity to flow smoothly through the sound outlet hole, so as to increase the effective vibration area when the sound device vibrates, thereby improving the performance of the sound device; further, by setting the side magnetic part to multiple, so that there is a gap between two adjacent side magnetic parts. An escape space is formed, and a first extension portion extending to the escape space is arranged on the second diaphragm assembly, and a second extension portion extending to the escape space is arranged on the diaphragm, so that the second extension portion is connected correspondingly to the first extension portion, thereby further increasing the connection area between the second diaphragm assembly and the diaphragm, improving stability while improving sealing, and at the same time, a rigid connector is arranged in the escape space, and the rigid connector is arranged as a rigid connector and a fourth extension portion extending from the rigid connector toward the voice coil, the rigid connector is connected to the first extension portion, and the fourth extension portion is connected to the voice coil, thereby ensuring the connection strength of the rigid connector connecting the voice coil and the second diaphragm assembly, thereby further ensuring that the voice coil drives the second diaphragm assembly to vibrate during the vibration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of a top view of the structure of an embodiment of a sound-generating device provided by the present invention;

[0034] Figure 2 A bottom-up structural schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0035] Figure 3 An exploded schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0036] Figure 4 A cross-sectional schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0037] Figure 5 A cross-sectional schematic diagram of another viewing angle of an embodiment of a sound-generating device provided by the present invention;

[0038] Figure 6 A schematic structural diagram of another embodiment of the sound-generating device provided by the present invention;

[0039] Figure 7 A schematic diagram of a partial top view of the structure of an embodiment of a sound-generating device provided by the present invention;

[0040] Figure 8 A schematic diagram of a top view of the structure of the connection between the magnetic circuit system, the centering support plate and the rigid connecting member in one embodiment of the sound-generating device provided by the present invention;

[0041] Fig. 9 for Figure 8 Schematic diagram of the decomposition of

[0042] Fig.10 A schematic diagram of a top view of the structure of another embodiment of the sound-generating device provided by the present invention in which a magnetic circuit system is connected with a centering support and a rigid connecting piece;

[0043] Fig.11 It is an exploded schematic diagram of a centering support piece and a rigid connecting piece in one embodiment of the present invention;

[0044] Fig.12 It is a schematic structural diagram of a centering support piece and a rigid connecting member in another embodiment of the present invention;

[0045] Fig.13 A schematic diagram of the structure of a diaphragm in one embodiment of the present invention;

[0046] Fig.14 It is a schematic diagram of the structure of the second vibration plate in one embodiment of the present invention;

[0047] Fig.15 is a schematic structural diagram of a second vibration plate in another embodiment of the present invention;

[0048] Fig.16 A cross-sectional schematic diagram of an embodiment of a sound module provided by the present invention;

[0049] Fig.17 A cross-sectional schematic diagram of another perspective of an embodiment of the sound module provided by the present invention.

[0050] Description of Figure Numbers:

[0051] 100. Sound-generating device; 1. Shell; 11. First shell; 111. Sound-generating hole; 112. Side wall; 113. Inner bending part; 12. Second shell; 121. Welding part; 2. Magnetic circuit system; 21. Magnetic yoke; 211. Avoidance structure; 22. Center magnetic part; 221. First center magnet; 222. Center magnetic plate; 223. Second center magnet; 224. Second protruding part; 23. Side magnetic part; 231. Side magnet; 232. Side magnetic plate; 233. Avoidance space; 24. Magnetic gap; 3. Vibration system; 31. First diaphragm assembly; 311. Inner folding ring; 312. First diaphragm; 3121. Second folding part; 313. Outer folding ring; 3131. Third flange; 32. Second diaphragm assembly; 321. folding ring; 3211. First flange; 322. second vibration plate; 3221, main body; 3222, first bending portion; 3223, inclined portion; 3224, first extension portion; 33, voice coil; 331, first protrusion; 34, diaphragm; 341, external connection portion; 342, deformation portion; 343, internal connection portion; 3431, second flange; 344, second extension portion; 35, rigid connection member; 351, rigid connection portion; 352, fourth extension portion; 36, centering support plate; 361, external fixing portion; 362, internal fixing portion; 3621, main body; 3622, third extension portion; 3623, internal pad; 363, vibration arm; 364, conductive portion; 365, external pad; 4, sound cavity; 500, module housing; 510, installation cavity; 520, sound outlet; 530, front sound cavity; 600, sound module.

[0052] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0055] At the same time, the meaning of "and / or," or "and / or" appearing in the full text includes three options. Taking "A and / or, B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0056] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0057] In recent years, with the rapid development of consumer electronic products, people's requirements for electronic products have been continuously improved. In addition to the performance differences of the products themselves, such as portability and comfort, which are several aspects that people focus on, the current conventional speaker solutions are difficult to take into account multiple design requirements such as high performance and lightness at the same time.

[0058] The sound-generating device is an important electroacoustic transducer component in consumer electronic products, and is widely used as loudspeakers, receivers, headphones, etc. With the improvement of the performance of electronic products, the improvement of the acoustic performance of the sound-generating device is also an inevitable trend.

[0059] The sound-generating device of the related technology includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system with a magnetic gap. The magnetic circuit system drives the vibration system to vibrate and generate sound. The vibration system includes a diaphragm fixed to the basin frame for vibrating and generating sound, a dome attached to the diaphragm, and a voice coil inserted in the magnetic gap and connected to the dome to drive the diaphragm to vibrate. That is, the sound-generating device drives the diaphragm in the vibration system to vibrate through the magnetic circuit system, repeatedly pushing the air to generate sound. The diaphragm, as the core component of the sound-generating device, directly affects the acoustic performance of the sound-generating device. The effective vibration area (Sd) of the diaphragm is one of the important factors affecting the acoustic performance of the sound-generating device. The larger the effective vibration area of ​​the diaphragm, the better the acoustic performance of the sound-generating device.

[0060] However, in the sound-emitting devices of the related art, the vibration system and the magnetic circuit system are stacked up and down, which limits the structure of the magnetic circuit system in the sound-emitting devices of the same height, thereby limiting the BL value of its magnetic field; in addition, the effective vibration area of ​​the diaphragm of the sound-emitting device in the related art is small, resulting in the acoustic performance of the sound-emitting device being affected.

[0061] Based on the above concepts and problems, the present invention proposes a sound-generating device 100. It is understandable that the sound-generating device 100 is applied to electronic devices, and the electronic devices may be mobile phones, headphones, smart wearable devices, etc., which are not limited here. In this embodiment, the sound-generating device 100 of the present invention adds a diaphragm 34 and a second diaphragm assembly 32 on the basis of a conventional speaker, and utilizes the relative change in volume between the diaphragm 34 and the second diaphragm assembly 32 when the sound-generating device 100 is working to push the air, thereby increasing the effective vibration area of ​​the sound-generating device 100 when it vibrates, thereby improving the performance of the sound-generating device 100.

[0062] It can be understood that the sound-generating device 100 of the present invention increases the effective vibration area by using the Z-direction space of the sound-generating device 100, thereby increasing the effective vibration area (Sd) of the sound-generating device 100, and at the same time makes up for the loss of Sd of the first diaphragm assembly 31 caused by the addition of magnets in the intermediate magnetic circuit, and because the magnets are added to the intermediate magnetic circuit, the magnetic field strength of the magnetic gap 24 is increased, thereby improving the performance of the sound-generating device 100. The sound-generating device 100 of the present invention takes into account both its high performance and lightweight solutions. Compared with conventional speakers, the performance of the sound-generating device 100 is improved under the same amplitude conditions, and the amplitude of the sound-generating device 100 can also be reduced under the same performance conditions, so that the product size is lightweight.

[0063] Please refer to Figures 1 to 15As shown, in the embodiment of the present invention, the sound-generating device 100 includes a housing 1, a magnetic circuit system 2 and a vibration system 3. The housing 1 is provided with a sound outlet 111. The magnetic circuit system 2 is connected to the housing 1. The magnetic circuit system 2 includes a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 provided on the magnetic yoke 21. The side magnetic portion 23 is located on the outside of the central magnetic portion 22 and forms a magnetic gap 24 with the central magnetic portion 22. The central magnetic portion 22 includes a first central magnet 221, a central magnetic plate 222 and a second central magnet 223 which are stacked. The first central magnet 221 and the second magnetic plate 223 are provided on the outer side of the central magnetic portion 22. The two central magnets 223 are magnetized along the vibration direction of the vibration system 3 and the magnetization directions are opposite. The first central magnet 221 is connected to the magnetic yoke 21. The side magnetic parts 23 include a plurality of side magnetic parts, and an escape space 233 is formed between two adjacent side magnetic parts 23. The vibration system 3 includes a first diaphragm assembly 31, a second diaphragm assembly 32, a voice coil 33, a diaphragm 34 and a rigid connector 35. The first diaphragm assembly 31 includes an inner folding ring 311, a first vibration plate 312 and an outer folding ring 313 connected in sequence. The inner side of the inner folding ring 311 is connected to the second central magnet 223, and the outer side of the inner folding ring 311 is connected to the second central magnet 223. The outer periphery of the folding ring 313 is connected to the housing 1, one end of the voice coil 33 is connected to the first diaphragm assembly 31, and the other end of the voice coil 33 is suspended in the magnetic gap 24. The diaphragm 34 and the second diaphragm assembly 32 are sequentially arranged on the side of the first diaphragm assembly 31 facing the magnetic guide yoke 21 and are located on the outside of the voice coil 33. The outer edges of the diaphragm 34 and the second diaphragm assembly 32 are both connected to the housing 1, and the inner edge of the diaphragm 34 is connected to the inner edge of the second diaphragm assembly 32, so as to form a sound cavity 4 connected to the sound outlet hole 111 between the diaphragm 34 and the second diaphragm assembly 32. The second diaphragm assembly 32 has a first extension portion 3224 extending to the avoidance space 233, and the diaphragm 34 has a second extension portion 344 extending to the avoidance space 233, and the second extension portion 344 is correspondingly connected to the first extension portion 3224; wherein, the rigid connector 35 is disposed in the avoidance space 233, and the rigid connector 35 includes a rigid connector 351 and a fourth extension portion 352 extending from the rigid connector 351 toward the voice coil 33, the rigid connector 351 is connected to the first extension portion 3224, and the fourth extension portion 352 is connected to the voice coil 33.

[0064] In this embodiment, the sound-generating device 100 may be a sound-generating unit of a speaker, and the speaker may be a micro speaker. It should be noted that the magnetic circuit system 2 and the vibration system 3 of the sound-generating device 100 are arranged opposite to each other.

[0065] Optionally, the magnetic circuit system 2 is arranged in a square shape. For example, the magnetic circuit system 2 may include a central magnetic portion 22 and a side magnetic portion 23, both of which are square structures. In this embodiment, the vibration system 3 is optionally arranged in a square shape. It can be understood that the periphery of the first diaphragm assembly 31 of the vibration system 3 can be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 3 can be respectively assembled on the speaker housing, etc., which is not limited here.

[0066] In order to better assemble the magnetic circuit system 2 and the vibration system 3 of the sound generating device 100. In one embodiment, as Figures 3 to 6 As shown, the sound-generating device 100 further includes a housing 1, and the magnetic circuit system 2 and the vibration system 3 are both connected to the housing 1. Specifically, the magnetic yoke 21 of the magnetic circuit system 2 is connected to one end of the housing 1, and the periphery of the first diaphragm assembly 31 of the vibration system 3 is connected to the other end of the housing 1, and is arranged opposite to the magnetic circuit system 2, and the inner periphery of the first diaphragm assembly 31 is connected to the central magnetic part 22 of the magnetic circuit system 2.

[0067] In this embodiment, the housing 1 is used to install, fix and support components such as the magnetic circuit system 2 and the vibration system 3, that is, the housing 1 provides an installation base for components such as the magnetic circuit system 2 and the vibration system 3. It can be understood that the housing 1 can be an integral structure or can be formed by the cooperation of multiple split structures, which is not limited here. The housing 1 in this embodiment can be selected as a square frame or frame structure, that is, the housing 1 has a cavity with openings at both ends, and the magnetic circuit system 2 and the vibration system 3 are respectively connected to the two sides of the housing 1, so that the magnetic circuit system 2, the housing 1 and the first diaphragm assembly 31 of the vibration system 3 enclose a vibration cavity.

[0068] In this embodiment, the housing 1 is used to accommodate and fix structures such as the vibration system 3 and the magnetic circuit system 2, so that the sound-generating device 100 can be used as an independent component in an electronic device or a sound-generating module, which is not limited here.

[0069] It can be understood that by setting the magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic part 22 and a side magnetic part 23 provided on the magnetic yoke 21, the magnetic circuit system 2 can be connected to the housing 1 through the periphery of the magnetic yoke 21. In this embodiment, the side magnetic part 23 is arranged on the outside of the central magnetic part 22, and is enclosed with the central magnetic part 22 to form a magnetic gap 24, so that the first diaphragm assembly 31 of the vibration system 3 is connected to the end of the housing 1 away from the magnetic yoke 21, the inner side of the first diaphragm assembly 31 is connected to the central magnetic part 22, and one end of the voice coil 33 is connected to the first diaphragm assembly 31, and the other end of the voice coil 33 is suspended in the magnetic gap 24, so that current is passed into the voice coil 33, so that the voice coil 33 converts electrical energy into mechanical energy in the magnetic gap 24 formed by the magnetic circuit system 2, so as to drive the voice coil 33 to drive the first diaphragm assembly 31 to vibrate, thereby achieving sound generation. Furthermore, by setting the central magnetic part 22 as a magnetic structure, the first central magnet 221, the central magnetic plate 222 and the second central magnet 223 are stacked in sequence on the magnetic yoke 21 along the vertical direction, and the first central magnet 221 and the second central magnet 223 are magnetized along the vibration direction of the vibration system 3, and the magnetization direction of the first central magnet 221 is opposite to the magnetization direction of the second central magnet 223. In this way, the magnetic conductivity of the central magnetic plate 222 is utilized to gather the magnetic flux lines of the first central magnet 221 and the second central magnet 223 on the central magnetic plate 222, and the magnetic flux lines are transmitted to the magnetic gap 24 by the central magnetic plate 222, so that the central magnetic part 22 generates a magnetic field with a strong magnetic field strength passing through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24, increasing the number of magnetic flux lines passing through the voice coil 33, increasing the magnetic field force on the voice coil 33, and effectively improving the BL value.

[0070] In this embodiment, the first diaphragm assembly 31 is configured as an inner folding ring 311, a first vibration plate 312 and an outer folding ring 313 connected in sequence, so that the inner side of the inner folding ring 311 is connected to the second central magnet 223, and the outer periphery of the outer folding ring 313 is connected to the housing 1, thereby achieving a fixed connection of the first diaphragm assembly 31, and at the same time, the vibration performance and compliance of the first diaphragm assembly 31 are improved by the inner folding ring 311 and the outer folding ring 313. It can be understood that the first vibration plate 312 is connected to the voice coil 33; or, the first vibration plate 312 is connected to the voice coil 33 through a connector or a frame, which is not limited here.

[0071] Optionally, the material of the first vibration plate 312 is a metal material or a fiber material. In this embodiment, the vibration plate is bonded or integrally injection-molded to the outer folding ring 313 and the inner folding ring 311, respectively. It should be noted that the inner folding ring 311, the first vibration plate 312 and the outer folding ring 313 of the first diaphragm assembly 31 can also be an integrally molded structure, which can ensure the structural strength of the first diaphragm assembly 31 and simplify the processing steps, which is not limited here.

[0072] In this embodiment, the outer periphery of the first vibration plate 312 forms a first step surface, and the inner periphery of the first vibration plate 312 forms a second step surface; the inner side of the outer fold ring 313 extends along a vibration direction perpendicular to the vibration system 3 to form an inner ring portion, and the outer side of the inner fold ring 311 extends along a vibration direction perpendicular to the vibration system 3 to form an outer ring portion; wherein, the inner ring portion overlaps the first step surface and is bonded to the first step surface, and the outer ring portion overlaps the second step surface and is bonded to the second step surface.

[0073] It can be understood that the first vibration plate 312 is respectively bonded to the outer folding ring 313 and the inner folding ring 311, which not only improves the connection stability, but also makes the assembly structure more compact, and ensures the vibration performance of the entire first diaphragm assembly 31. Of course, in other embodiments, the inner ring portion of the outer folding ring 313 and the outer ring portion of the inner folding ring 311 can be connected to the same side of the first vibration plate 312 (for example, the upper surface of the first vibration plate 312 or the lower surface of the first vibration plate 312) or the inner ring portion of the outer folding ring 313 and the outer ring portion of the inner folding ring 311 can be connected to different sides of the first vibration plate 312, which is not limited here.

[0074] In this embodiment, if Figure 1 , Figures 3 to 6 As shown, the inner fold ring 311 of the first diaphragm assembly 31 can be a sealed structure, that is, the inner side of the inner fold ring 311 is flat and plate-shaped, and the inner flat plate of the inner fold ring 311 is connected and fitted to the side of the central magnetic part 22 of the magnetic circuit system 2 facing away from the magnetic guide yoke 21.

[0075] Of course, in other embodiments, the first diaphragm assembly 31 may be an annular structure. In this embodiment, a hollow hole is provided on the inner side of the inner fold ring 311, and part of the central magnetic part 22 is exposed in the hollow hole or part of the central magnetic part 22 is inserted into the hollow hole, which is not limited here.

[0076] In this embodiment, the outer folding ring 313 and the inner folding ring 311 of the first diaphragm assembly 31 can be a convex structure protruding upward or a concave structure concave downward, which is not limited here. In order to avoid the diaphragm 34 and the second diaphragm assembly 32, the outer folding ring 313 of the first diaphragm assembly 31 can optionally protrude in the direction away from the magnetic circuit system 2. It can be understood that in order to avoid the inner folding ring 311 of the first diaphragm assembly 31 from interfering with the central magnetic part 22 of the magnetic circuit system 2 during vibration, the inner folding ring 311 of the first diaphragm assembly 31 can optionally protrude in the direction away from the magnetic circuit system 2. Optionally, both the inner folding ring 311 and the outer folding ring 313 protrude in the direction away from the magnetic circuit system 2.

[0077] In order to further increase the connection area between the outer folding ring 313 of the first diaphragm assembly 31 and the housing 1 and improve stability, in this embodiment, as shown in FIG. Figures 3 to 6As shown, the outer periphery of the outer fold ring 313 is bent and extended to form a third flange 3131, and the third flange 3131 is connected to the outer wall of the housing 1. It can be understood that the outer periphery of the outer fold ring 313 has a straight portion parallel to the first vibration plate 312, and the straight portion is connected to the end surface of the housing 1. The third flange 3131 is formed by bending and extending the outer side of the straight portion toward the direction close to the magnetic circuit system 2, so that the third flange 3131 is connected to the outer wall of the housing 1, thereby increasing the connection area with the housing 1, improving the connection stability and waterproof sealing performance.

[0078] In order to realize the electrical connection between the voice coil 33 and the external circuit. Figures 3 to 12 As shown, the vibration system 3 further includes a centering support plate 36 , one end of which is connected to the voice coil 33 and is connected and conducted with the lead wire of the voice coil 33 , and the other end of the centering support plate 36 is connected to the housing 1 .

[0079] It can be understood that the two ends of the centering support 36 are electrically connected to the lead wire of the voice coil 33 and the external circuit respectively. In this embodiment, the centering support 36 can be arranged at the bottom of the voice coil 33, and the centering support 36 is located at the four corners of the sound-generating device 100 or in the short axis or long axis direction of the sound-generating device 100. Of course, the centering support 36 can also be arranged at the top of the voice coil 33, and the centering support 36 is located between the voice coil 33 and the diaphragm 31, which is not limited here.

[0080] In this embodiment, the diaphragm 34 and the second diaphragm assembly 32 of the vibration system 3 are sequentially arranged on the side of the first diaphragm assembly 31 facing the magnetic guide yoke 21 and located on the outside of the voice coil 33, so that the outer edges of the diaphragm 34 and the second diaphragm assembly 32 are connected to the outer shell 1, and the inner edge of the diaphragm 34 is connected to the inner edge of the second diaphragm assembly 32, so as to form a sound cavity 4 between the diaphragm 34 and the second diaphragm assembly 32, and a sound outlet hole 111 is arranged on the outer shell 1, so that the sound cavity 4 is connected to the sound outlet hole 111, and one end of the rigid connector 35 is connected to the second diaphragm assembly 32, and the other end of the rigid connector 35 is connected to the voice coil 33, so that the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connector 35.

[0081] It can be understood that when current is passed through the voice coil 33, the voice coil 33 converts electrical energy into mechanical energy in the magnetic gap 24 formed by the magnetic circuit system 2 to drive the voice coil 33 to drive the first diaphragm assembly 31 to vibrate, thereby achieving sound. At the same time, the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connector 35, so that the volume between the diaphragm 34 and the second diaphragm assembly 32 changes relatively to promote the air in the sound cavity 4 to flow smoothly through the sound outlet 111. At this time, the sound-emitting device 100 adds a diaphragm 34 and a second diaphragm assembly 32 on the basis of a conventional speaker. When the sound-emitting device 100 is working, the voice coil 33 drives the first diaphragm assembly 31, the second diaphragm assembly 32 and the diaphragm 34 to vibrate at the same time, so as to increase the effective vibration area of ​​the sound-emitting device 100 during vibration, thereby improving the performance of the sound-emitting device 100.

[0082] In the present embodiment, the structure of the second diaphragm assembly 32 may be a diaphragm structure or other structure capable of vibrating and making sounds, which is not limited here. The structure of the diaphragm 34 may be a structure capable of vibrating and deforming, which is not limited here. Optionally, the diaphragm 34 is a flexible member, and the diaphragm 34 is a flexible material such as a single-layer PEEK (polyetheretherketone) film, a composite PEEK (polyetheretherketone) film, etc. It can be understood that the rigid connector 35 is used to connect the voice coil 33 and the second diaphragm assembly 32, so that the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connector 35. The rigid connector 35 may be a metal material such as stainless steel or other materials with a certain strength such as carbon fiber, which is not limited here.

[0083] It should be noted that the sound cavity 4 formed between the diaphragm 34 and the second diaphragm assembly 32 is a sealed front cavity. When the sound device 100 is working, the first diaphragm assembly 31 and the second diaphragm assembly 32 have the same vibration direction, and the volume change of the sound cavity 4 is used to increase the volume of air pushed during work, thereby increasing the effective vibration area of ​​the product. At the same time, by providing the diaphragm 34 and the second diaphragm assembly 32, the sound device 100 uses its own Z-direction space to increase the effective vibration area, thereby increasing the Sd of the sound device 100, and at the same time reducing the Sd loss caused by the connection between the inner folding ring 311 of the first diaphragm assembly 31 and the central magnetic part 22, thereby improving the performance of the sound device 100.

[0084] Optionally, the effective vibration area Sd1 of the diaphragm 34 is smaller than the effective vibration area Sd2 of the second diaphragm assembly 32, and the ratio of Sd1 to Sd2 is 1:1.5 to 1:3. In this embodiment, the ratio of the effective vibration area Sd1 of the diaphragm 34 to the effective vibration area Sd2 of the second diaphragm assembly 32 can be 1:1.5, 1:1.8, 1:2, 1:2.3, 1:2.5, 1:2.8, 1:3, etc., which is not limited here.

[0085] It can be understood that with such an arrangement, when the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connector 35, the second vibration plate 322 of the second diaphragm assembly 32 drives the diaphragm 34 to vibrate and deform, so that the diaphragm 34 has a reaction effect on the pushed air volume, and the second diaphragm assembly 32 has a positive effect on the pushed air volume. The volume change of the sound cavity 4 is used to increase the pushed air volume during operation, thereby increasing the effective vibration area of ​​the product.

[0086] In one embodiment, the edge magnetic portion 23 includes a plurality of edge magnetic portions, and an escape space 233 is formed between two adjacent edge magnetic portions 23. The second vibration plate 322 has a first extension portion 3224 extending to the escape space 233. The diaphragm 34 has a second extension portion 344 extending to the escape space 233. The second extension portion 344 is correspondingly connected to the first extension portion 3224.

[0087] In this embodiment, if Figure 3 , Figures 7 to 9 , Fig.15 As shown, by providing a plurality of side magnetic portions 23, the plurality of side magnetic portions 23 surround and are spaced apart on the outside of the central magnetic portion 22, so that an escape space 233 is formed between two adjacent side magnetic portions 23, thereby utilizing the escape space 233 to provide an escape and activity space for the rigid connector 35, that is, the rigid connector 35 is disposed in the escape space 233, so that one end of the rigid connector 35 is connected to the second diaphragm assembly 32, and the other end of the rigid connector 35 is connected to the voice coil 33, so that the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connector 35.

[0088] It can be understood that by arranging the first extension portion 3224 on the second diaphragm assembly 32, the first extension portion 3224 extends toward the avoidance space 233 and is connected to the rigid connector 35, so that the connection stability between the second diaphragm assembly 32 and the rigid connector 35 can be increased to ensure that the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connector 35. Optionally, the first extension portion 3224 is formed by extending the second vibration plate 322 toward the avoidance space 233.

[0089] In this embodiment, if Fig.13 As shown, the diaphragm 34 has a second extension portion 344 extending to the avoidance space 233, and the second extension portion 344 is connected to the first extension portion 3224 correspondingly, thereby further increasing the connection stability and sealing performance between the diaphragm 34 and the second vibration plate 322. It can be understood that, as Fig.13 As shown, the inner connecting portion 343 and the second flange 3431 of the diaphragm 34 both extend toward the avoidance space 233 and form a second extension portion 344 , which is not limited here.

[0090] Understandable, such as Figure 3 , Figures 8 to 12 As shown, by setting the rigid connector 35 as a rigid connector portion 351 and a fourth extension portion 352, the rigid connector 35 can be connected to the first extension portion 3224 of the second diaphragm assembly 32 via the rigid connector portion 351, and connected to the voice coil 33 via the fourth extension portion 352, thereby ensuring the connection strength between the rigid connector 35 and the voice coil 33 and the second diaphragm assembly 32, thereby further ensuring that the voice coil 33 drives the second diaphragm assembly 32 to vibrate during the vibration process.

[0091] In another embodiment, the side magnetic portion 23 includes a plurality of side magnetic portions, and an escape space 233 is formed between two adjacent side magnetic portions 23. The voice coil 33 has a first protrusion 331 extending to the escape space 233. The center magnetic portion 22 has a second protrusion 224 extending to the escape space 233. The first protrusion 331 and the second protrusion 224 are arranged opposite to each other.

[0092] In this embodiment, if Fig.10 As shown, a plurality of side magnetic portions 23 are surrounded and spaced apart on the outside of the central magnetic portion 22, so that an escape space 233 is formed between two adjacent side magnetic portions 23. A first protrusion 331 is provided on the voice coil 33, so that the first protrusion 331 extends to the escape space 233, and a second protrusion 224 is provided on the central magnetic portion 22, so that the second protrusion 224 extends to the escape space 233, and is spaced apart from and corresponds to the first protrusion 331. Such a setting increases the length of the wire of the voice coil 33 on the one hand, thereby facilitating the rigid connector 35 to connect the voice coil 33 with the second diaphragm assembly 32, and increases the magnet volume of the central magnetic portion 22 on the other hand, thereby effectively improving the magnetic field strength, which can further improve the BL value of the sound-generating device 100.

[0093] It can be understood that the central magnetic portion 22 can be selected as a rectangular structure, the voice coil 33 can be selected as a rectangular voice coil, the avoidance space 233 of the side magnetic portion 23 is set corresponding to the corner position of the central magnetic portion 22, the four corner positions of the voice coil 33 are respectively provided with a first protrusion 331, and the four corner positions of the central magnetic portion 22 are respectively provided with a second protrusion 224, which is not limited here.

[0094] The sound-generating device 100 of the present invention is provided by accommodating the magnetic circuit system 2 and the vibration system 3 in the housing 1, and configuring the magnetic circuit system 2 to be a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 provided on the magnetic yoke 21, so that the side magnetic portion 23 is located outside the central magnetic portion 22 and is enclosed with the central magnetic portion 22 to form a magnetic gap 24, and configuring the vibration system 3 to be a first diaphragm assembly 31, a second diaphragm assembly 32, a voice coil 33, a diaphragm 34 and a rigid connector 35, so that the inner side of the inner folding ring 311 of the first diaphragm assembly 31 is connected to the central magnetic portion 22, and the outer folding ring 312 is connected to the central magnetic portion 22. The outer periphery of 13 is connected to the housing 1, and one end of the voice coil 33 is connected to the first diaphragm assembly 31, and the other end of the voice coil 33 is suspended in the magnetic gap 24, so that current is passed through the voice coil 33, so that the voice coil 33 converts electrical energy into mechanical energy in the magnetic gap 24 formed by the magnetic circuit system 2, so as to drive the voice coil 33 to drive the first diaphragm assembly 31 to vibrate, thereby achieving sound, and the central magnetic part 22 is a magnetic structure, so that the magnetic field strength of the magnetic circuit system 2 of the sound-generating device 100 can be improved, and the performance of the sound-generating device 100 can be improved as a whole; at the same time, the diaphragm 34 and the first The second diaphragm assembly 32 is sequentially arranged on the side of the first diaphragm assembly 31 facing the magnetic guide yoke 21 and is located on the outside of the voice coil 33, so that the outer edges of the diaphragm 34 and the second diaphragm assembly 32 are connected to the housing 1, and the inner edge of the diaphragm 34 is connected to the inner edge of the second diaphragm assembly 32, so as to form a sound cavity 4 between the diaphragm 34 and the second diaphragm assembly 32, and a sound outlet hole 111 is arranged in the housing 1, so that the sound cavity 4 is connected to the sound outlet hole 111, and one end of the rigid connector 35 is connected to the second diaphragm assembly 32, and the other end of the rigid connector 35 is connected to the voice coil 33, so that the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connection member 35. In this way, the diaphragm 34 and the second diaphragm assembly 32 are added to the conventional speaker. When the sound-generating device 100 is working, the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connection member 35, so that the volume between the diaphragm 34 and the second diaphragm assembly 32 changes relatively to promote the air in the sound-generating cavity 4 to flow smoothly through the sound outlet hole 111, so as to increase the effective vibration area when the sound-generating device 100 vibrates, thereby improving the performance of the sound-generating device 100;Further, by providing a plurality of edge magnets 23, an escape space 233 is formed between two adjacent edge magnets 23, and a first extension portion 3224 extending to the escape space 233 is provided on the second diaphragm assembly 32, and a second extension portion 344 extending to the escape space 233 is provided on the diaphragm 34, so that the second extension portion 344 is correspondingly connected to the first extension portion 3224, thereby further increasing the connection area between the second diaphragm assembly 32 and the diaphragm 34, improving stability and sealing performance, and at the same time, a rigid connector 35 is provided in the escape space 233, and the rigid connector 35 is provided as a rigid connector 351 and a fourth extension portion 352 extending from the rigid connector 351 toward the voice coil 33, and the rigid connector 351 is connected to the first extension portion 3224, and the fourth extension portion 352 is connected to the voice coil 33, thereby ensuring the connection strength of the rigid connector 35 connecting the voice coil 33 and the second diaphragm assembly 32, thereby further ensuring that the voice coil 33 drives the second diaphragm assembly 32 to vibrate during the vibration process. ;

[0095] In one embodiment, the first vibration plate 312 is bent and extended toward the voice coil 33 to form a second bent portion 3121 , and the second bent portion 3121 is connected to the voice coil 33 .

[0096] In this embodiment, if Figures 3 to 5 As shown, by setting the second bending portion 3121 on the first vibration plate 312, the second bending portion 3121 extends toward the voice coil 33, so that the first vibration plate 312 is connected to the voice coil 33 through the second bending portion 3121, and the voice coil 33 is suspended at a more reasonable position in the magnetic gap 24 by utilizing the second bending portion 3121, so as to ensure the effect of the magnetic circuit system 2 driving the voice coil 33 to vibrate.

[0097] It is understandable that the second bending portion 3121 is formed by bending and extending the inner side of the first vibration plate 312 toward the voice coil 33. Optionally, the first vibration plate 312 and the second bending portion 3121 are integrally formed, such as integrally injection molded or integrally stamped, etc., which is not limited here.

[0098] In another embodiment, the first diaphragm assembly 31 further includes a bracket, and both ends of the bracket are respectively connected to the first vibration plate 312 and the voice coil 33. It can be understood that the bracket can be connected to the first vibration plate 312 by bonding, welding or integral injection molding, so that the first vibration plate 312 is connected to the voice coil 33 through the bracket, so that the voice coil 33 is suspended at a more reasonable position in the magnetic gap 24 by using the bracket, so as to ensure the effect of the magnetic circuit system 2 driving the voice coil 33 to vibrate.

[0099] In one embodiment, the second diaphragm assembly 32 includes a folding ring portion 321 and a second vibration plate 322, the outer periphery of the folding ring portion 321 is connected to the outer shell 1, and the second vibration plate 322 includes a main body portion 3221 connected to the inner edge of the folding ring portion 321 and a first bending portion 3222 formed by the main body portion 3221 bending and extending toward the diaphragm 34, and the first bending portion 3222 is connected to the inner edge of the diaphragm 34; wherein, the main body portion 3221 extends from one side of the folding ring portion 321 toward the avoidance space 233 to form a first extension portion 3224.

[0100] In this embodiment, the folding ring portion 321 of the second diaphragm assembly 32 may be a convex structure protruding upward or a concave structure concave downward, which is not limited here. In order to facilitate the connection between the folding ring portion 321 and the housing 1, as shown in FIG. Figures 4 to 6 As shown, the outer periphery of the folding ring portion 321 is bent to form a first flange 3211 , and the first flange 3211 is connected to the outer wall of the housing 1 .

[0101] It can be understood that the first flange 3211 is formed by the outer peripheral edge of the folding ring portion 321 extending along the vibration direction of the vibration system, and the first flange 3211 can be connected to the outer side wall of the housing 1, so that the connection area between the folding ring portion 321 and the housing 1 can be increased, and the connection stability and waterproof sealing performance can be improved. Of course, the outer side of the folding ring portion 321 has a horizontal portion extending along the vibration direction perpendicular to the vibration direction of the vibration system, the horizontal portion is connected to the end face of the housing 1, and the outer side of the horizontal portion extends along the vibration direction of the vibration system to form the first flange 3211, which is not limited here.

[0102] In this embodiment, by setting the second vibration plate 322 as a main body 3221 and a first bending portion 3222, the end of the main body 3221 away from the first bending portion 3222 is connected to the inner edge of the folding ring portion 321, and the first bending portion 3222 is connected to the inner edge of the diaphragm 34, so that the inner edge of the diaphragm 34 is connected to the side edge of the second diaphragm assembly 32, so that the diaphragm 34, the second vibration plate 322 of the second diaphragm assembly 32, the folding ring portion 321 and the housing 1 form a sound cavity 4. It can be understood that the second vibration plate 322 of the second diaphragm assembly 32 is connected to the voice coil 33 through the rigid connector 35. In this way, when the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connector 35, the second vibration plate 322 of the second diaphragm assembly 32 drives the diaphragm 34 to vibrate and deform.

[0103] Optionally, the folding ring portion 321 of the second diaphragm assembly 32 and the second vibration plate 322 are bonded or integrally injection molded, which is not limited here. In this embodiment, the main body 3221 of the second vibration plate 322 and the first bending portion 3222 are an integrally molded structure, and the first bending portion 3222 is formed by bending and extending the main body 3221 toward the diaphragm 34, for example, by injection molding or stamping molding, which is not limited here.

[0104] In one embodiment, an inclined portion 3223 is formed at the connection between the main body portion 3221 and the first bending portion 3222 , and the inclined portion 3223 is arranged at an angle to the vibration direction of the vibration system 3 .

[0105] Understandable, such as Figures 3 to 5 , Fig.14 As shown, the plane where the inclined portion 3223 is located is set at an angle with the vibration direction of the vibration system 3, and the angle is optionally greater than 0° and less than 90°. The setting of the inclined portion 3223 can improve the rigidity of the second vibration plate 322 in the horizontal direction (i.e., perpendicular to the vibration direction of the vibration system 3), thereby improving the vibration performance of the second diaphragm assembly 32 and improving the feasibility of molding. At the same time, the inclined portion 3223 is further away from the magnetic circuit system 2 relative to the inner edge of the second vibration plate 322, which can make the outer edge of the magnetic circuit system 2 tilt outward and expand, thereby increasing the size of the magnetic circuit system 2 and further improving the BL of the sound-generating device 100; and the inclined portion 3223 is more convenient for the positioning connection between the second vibration plate 322 and the folding ring portion 321, thereby improving the connection accuracy. Optionally, the second vibration plate 322 can be a magnesium-aluminum alloy, a magnesium-lithium alloy, etc., which is not limited here.

[0106] In one embodiment, the diaphragm 34 is a flexible member, and the diaphragm 34 includes an external connection portion 341, a deformation portion 342 and an internal connection portion 343 which are connected in sequence, the outer periphery of the external connection portion 341 is connected to the outer shell 1, the inner edge of the internal connection portion 343 is connected to the first bending portion 3222, and the deformation portion 342 is bent; wherein the internal connection portion 343 corresponds to the first extension portion 3224 and extends toward the avoidance space 233 to form a second extension portion 344.

[0107] In this embodiment, if Figures 3 to 5 , Fig.13 As shown, by setting the diaphragm 34 as a flexible part, when the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connecting part 35, the second vibration plate 322 of the second diaphragm assembly 32 drives the diaphragm 34 to vibrate and deform, so that the volume between the diaphragm 34 and the second diaphragm assembly 32 changes relatively to promote the air in the sound cavity 4 to flow smoothly through the sound outlet hole 111, so as to increase the effective vibration area of ​​the sound device 100 when it vibrates, thereby improving the performance of the sound device 100.

[0108] It can be understood that by setting the diaphragm 34 as an external connection part 341, a deformation part 342 and an internal connection part 343, the outer periphery of the external connection part 341 is connected to the outer shell 1, and the inner edge of the internal connection part 343 is connected to the first bending part 3222. In this way, the diaphragm 34 can be connected and fixed to the outer shell 1 through the external connection part 341, and can be connected to the inner edge of the second diaphragm assembly 32 through the internal connection part 343, so that a sealed sound cavity 4 is formed between the diaphragm 34 and the second diaphragm assembly 32. At the same time, the deformation part 342 is set to a bending shape, which improves the deformation ability of the diaphragm 34. When the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connection part 35, the second vibration plate 322 of the second diaphragm assembly 32 drives the diaphragm 34 to vibrate and deform.

[0109] In one embodiment, the inner edge of the inner connection portion 343 is bent and extended toward the first bending portion 3222 to form a second flange 3431 , and the second flange 3431 is connected to the first bending portion 3222 .

[0110] In this embodiment, if Figures 3 to 5 , Fig.13 As shown, by providing a second flange 3431 at the inner edge of the inner connection portion 343, and further utilizing the second flange 3431 to connect with the first bending portion 3222, not only the connection stability is improved, but also the waterproof sealing performance is further improved. Optionally, the second flange 3431 is formed by bending and extending the inner edge of the inner connection portion 343 toward the first bending portion 3222.

[0111] Optionally, the outer connection portion 341 , the deformation portion 342 , the inner connection portion 343 and the second flange 3431 of the diaphragm 34 are an integrally formed structure, such as integrally injection molded or integrally stamped, etc., which is not limited here.

[0112] In this embodiment, the compliance of the diaphragm 34 may be optionally greater than the compliance of the folding ring 321. It can be understood that when the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the rigid connector 35, the diaphragm 34 only plays the role of isolation and sealing, and will not generate a reverse force on the vibration of the second diaphragm assembly 32, thereby improving the low-frequency sensitivity of the speaker.

[0113] It can be understood that the compliance of the diaphragm 34 is optionally greater than the compliance of the inner fold 311 of the first diaphragm assembly 31, and the compliance of the diaphragm 34 is optionally greater than the compliance of the outer fold 313 of the first diaphragm assembly 31. In this way, the diaphragm 34 only plays a sealing role and does not have a reverse effect on the vibration of the first diaphragm assembly 31 and the second diaphragm assembly 32, thereby improving the low-frequency sensitivity.

[0114] Optionally, the deformation portion 342 protrudes in a direction away from the first diaphragm assembly 31, and the folding ring portion 321 protrudes in a direction close to the first diaphragm assembly 31, and the deformation portion 342 and the folding ring portion 321 are staggered in a direction perpendicular to the vibration system 3. It can be understood that such an arrangement prevents the folding ring portion 321 of the second diaphragm assembly 32 from interfering with the deformation portion 342 of the diaphragm 34 during the vibration process. Of course, in other embodiments, the folding ring portion 321 may also protrude in a direction away from the first diaphragm assembly 31, which is not limited here.

[0115] In one embodiment, along the vibration direction of the vibration system 3 , the projection width L1 of the deformation portion 342 is greater than or equal to the projection width L2 of the folding ring portion 321 , and the ratio of L1 to L2 is 1:1 to 3:1.

[0116] In this embodiment, if Figure 4 As shown, along the vibration direction of the vibration system 3, by setting the projection width L1 of the deformation portion 342 of the diaphragm 34 to be greater than or equal to the projection width L2 of the folding ring portion 321 of the second diaphragm assembly 32, it can effectively ensure that the effective vibration area Sd2 of the second diaphragm assembly 32 is greater than the effective vibration area Sd1 of the diaphragm 34. In this way, when the voice coil 33 drives the second diaphragm assembly 32 and the diaphragm 34 to vibrate, the diaphragm 34 has a reaction effect on the pushed air volume, and the second diaphragm assembly 32 has a positive effect on the pushed air volume. The volume change of the sound cavity 4 is used to increase the pushed air volume during operation, thereby increasing the effective vibration area of ​​the product.

[0117] Optionally, the ratio of L1 to L2 is 1:1, 1.5:1, 2:1, 2.5:1, 3:1, etc., which is not limited here.

[0118] In one embodiment, the vibration system 3 also includes a centering support plate 36, which includes an external fixing portion 361, an internal fixing portion 362 and a vibration arm 363 connecting the external fixing portion 361 and the internal fixing portion 362, the external fixing portion 361 is connected to the outer shell 1, and the rigid connecting member 35 is arranged on the inner fixing portion 362; the second diaphragm assembly 32 includes a connected folding ring portion 321 and a second vibration plate 322, the outer periphery of the folding ring portion 321 is connected to the outer shell 1, and the inner edge of the second vibration plate 322 is connected to the inner edge of the diaphragm 34; wherein the internal fixing portion 362 is connected to the second vibration plate 322 and the voice coil 33, and is electrically connected to the lead of the voice coil 33.

[0119] In this embodiment, if Figures 3 to 12 As shown, the arrangement of the centering support 36, on the one hand, enables the voice coil 33 to be connected to the external circuit through the centering support 36, and on the other hand, the centering support 36 plays a centering role on the vibration of the voice coil 33 through the rigid connecting piece 35, thereby preventing the voice coil 33 from swinging or polarizing during the vibration process.

[0120] In order to prevent the setting of the centering support 36 from interfering with or affecting the second diaphragm assembly 32, the folding ring portion 321 of the second diaphragm assembly 32 protrudes toward the direction close to the first diaphragm assembly 31. It can be understood that there can be one or more centering support 36. When there are multiple centering support 36, the multiple centering support 36 are distributed along the long axis direction and / or the short axis direction of the magnetic circuit system 2 and / or the four corners of the magnetic circuit system 2.

[0121] It can be understood that the plurality of centering supports 36 can be symmetrically distributed along the long axis direction of the magnetic circuit system 2; the plurality of centering supports 36 can also be symmetrically distributed along the short axis direction of the magnetic circuit system 2; the plurality of centering supports 36 can also be correspondingly arranged at the four corners of the magnetic circuit system 2. Of course, in other embodiments, the plurality of centering supports 36 can be correspondingly distributed along the long axis direction of the magnetic circuit system 2, the short axis direction of the magnetic circuit system 2, and the diagonal or four corner positions of the magnetic circuit system 2, which is not limited here.

[0122] Optionally, the centering support plates 36 include two or four. Such an arrangement can not only utilize the centering support plates 36 to connect the voice coil 33 to the external circuit, but also ensure the vibration balance of the sound-generating device 100 .

[0123] In one embodiment, the centering support piece 36 includes an outer fixing portion 361 , an inner fixing portion 362 and a vibration arm 363 connecting the outer fixing portion 361 and the inner fixing portion 362 . The outer fixing portion 361 is connected to the housing 1 , and the rigid connector 35 is disposed on the inner fixing portion 362 .

[0124] In this embodiment, if Figure 3 , Figures 7 to 12 As shown, the inner fixing portion 362 is connected to the second vibration plate 322 of the second diaphragm assembly 32 and the voice coil 33, and is electrically connected to the lead of the voice coil 33. Optionally, the inner fixing portion 362 is provided with an inner solder pad 3623, and the lead of the voice coil 33 is connected and conducted to the inner solder pad 3623. In this way, the lead of the voice coil 33 can be easily connected and smoothly connected to the external circuit.

[0125] Optionally, the rigid connector 35 is disposed on a side of the inner fixing portion 362 away from the second diaphragm assembly 32. It can be understood that this increases the distance between the centering support 36 and the magnetic circuit system 2, and only a part of the magnetic circuit system 2 needs to be arranged to avoid the rigid connector 35, and there is no need to increase the height of the sound-generating device 100 to meet the amplitude of the vibration system 3, which is conducive to a thin configuration.

[0126] Alternatively, if Figure 3 , Figures 8 to 12As shown, the outer fixing portion 361, the vibration arm 363 and the inner fixing portion 362 of the centering support 36 can be an integrally formed structure. This can effectively ensure the structural strength of the centering support 36 and simplify the processing steps of the centering support 36. In order to ensure the deformation ability of the centering support 36, the vibration arm 363 can be optionally provided with at least one bend.

[0127] In one embodiment, if Figure 3 , Figures 8 to 12 As shown, the outer fixing portion 361 is arranged in a ring shape, and has short axis sides and long axis sides that are alternately connected. The vibration arm 363 is led out from one side of the inner fixing portion 362 corresponding to the short axis side and extends along the long axis side after being bent. The vibration arm 363 is connected to the central area of ​​the long axis side.

[0128] In this embodiment, if Figure 3 , Figures 8 to 12 As shown, there is one centering support 36, in which case the outer fixing portion 361 of the centering support 36 may be a rectangular ring structure, the vibration arms 363 include at least two, and the inner fixing portions 362 may be four. It can be understood that such a configuration can increase the length of the vibration arm 363, increase the stress of the vibration arm 363, and thus improve reliability.

[0129] Optionally, the vibration arms 363 include four, and the internal fixed parts 362 include four. Each internal fixed part 362 is connected to the external fixed part 361 through a vibration arm 363. Optionally, the four vibration arms 363 and the four internal fixed parts 362 are respectively arranged corresponding to the four corners of the rectangular ring external fixed part 361. In the present embodiment, the four internal fixed parts 362 are respectively arranged corresponding to the avoidance spaces 233 of the side magnetic part 23, and at least part of the internal fixed parts 362 pass through the avoidance spaces 233 and extend into the magnetic gap 24, and are connected to the voice coil 33, which is not limited here.

[0130] Understandable, such as Figure 3 , Figures 8 to 12 As shown, the outer fixing portion 361, the vibration arm 363 and the inner fixing portion 362 of the centering support 36 can be located in the same plane. Of course, in other embodiments, the outer fixing portion 361 and the inner fixing portion 362 of the centering support 36 can also be located in different planes, which is not limited here.

[0131] In this embodiment, if Figure 3 , Figure 7 and Figure 8As shown, the voice coil 33 may be optionally in the shape of a rectangular ring, and the four inner fixing portions 362 of the centering support plate 36 are respectively arranged corresponding to the four corner positions of the voice coil 33, which is not limited here. It can be understood that the outer fixing portion 361 of the centering support plate 36 is bonded to the outer shell 1, and the inner fixing portion 362 and the rigid connector 35 can be bonded, welded or integrally formed, which is not limited here. In this way, the length of the product's outer dimensions can be utilized to increase the length of the vibration arm 363 of the centering support plate 36, so that the reliability is better when working with large amplitudes; at the same time, the centering support plate 36 provides constraints on the vibration system 3, which can better suppress the poor performance caused by product polarization under large amplitudes.

[0132] In order to better connect with the external circuit, in one embodiment, as Figures 1 to 3 , Figure 5 , Figure 6 , Figures 8 to 12 As shown, the centering support 36 further includes a conductive portion 364, one end of which is connected to the external fixing portion 361, and the other end of the conductive portion 364 extends in a direction away from the housing 1 and is provided with an external soldering pad 365. In this way, the external soldering pad 365 can be guided to the outside of the housing 1 through the conductive portion 364, thereby facilitating the connection and conduction between the external circuit and the centering support 36, and ensuring that current flows into the voice coil 33.

[0133] In one embodiment, the magnetic yoke 21 is provided with a avoidance structure 211 corresponding to the inner fixing portion 362. It can be understood that Figure 2 , Figure 3 and Fig. 9 As shown, by providing an avoidance structure 211 on the magnetic yoke 21 , the avoidance structure 211 can be used to provide avoidance for the centering support plate 36 during the vibration of the second diaphragm assembly 32 , ensuring that the inner fixing portion 362 or the rigid connecting member 35 of the centering support plate 36 will not touch the magnetic yoke 21 .

[0134] Optionally, the avoidance structure 211 is a recessed groove or a through hole. It can be understood that the avoidance structure 211 is a recessed groove, that is, a groove structure formed by the side of the magnetic yoke 21 facing the centering support plate 36 being recessed in a direction away from the centering support plate 36. The avoidance structure 211 is a through hole, that is, the through hole passes through the magnetic yoke 21; at the same time, the avoidance structure 211 can also be used as an air vent of the sound-generating device 100 to ensure that the airflow in the vibration cavity of the sound-generating device 100 is connected with the external airflow during the vibration of the first diaphragm assembly 31, thereby ensuring the balance of internal and external air pressures.

[0135] In one embodiment, the internal fixing portion 362 includes a main body portion 3621 and a third extension portion 3622 extending from the main body portion 3621 toward the voice coil 33, the main body portion 3621 is connected to the second vibration plate 322, and the third extension portion 3622 is connected to the voice coil 33; wherein the third extension portion 3622 or the main body portion 3621 is provided with an internal solder pad 3623 electrically connected to the lead of the voice coil 33.

[0136] In this embodiment, if Figure 3 , Figures 8 to 12 As shown, by setting the inner fixing portion 362 of the centering support plate 36 as the main body portion 3621 and the third extension portion 3622, the third extension portion 3622 extends toward the voice coil 33. In this way, while the main body portion 3621 of the inner fixing portion 362 is connected to the second vibration plate 322 of the second diaphragm assembly 32, the inner fixing portion 362 of the centering support plate 36 is connected to the voice coil 33 through the third extension portion 3622, thereby further ensuring that the voice coil 33 drives the second diaphragm assembly 32 to vibrate during the vibration process.

[0137] It can be understood that by providing an inner solder pad 3623 on the third extension portion 3622 or the main body portion 3621 , the inner solder pad 3623 can be conveniently used to electrically connect with the lead of the voice coil 33 , thereby ensuring that the voice coil 33 is connected to the external circuit through the centering support plate 36 .

[0138] In one embodiment, the rigid connection portion 351 is connected to the main body portion 3621 , and the fourth extension portion 352 is correspondingly connected to the third extension portion 3622 .

[0139] In this embodiment, if Figure 3 , Figures 8 to 12 As shown, by setting the rigid connector 35 as a rigid connector portion 351 and a fourth extension portion 352, the rigid connector 35 can be connected to the inner fixing portion 362 of the centering support plate 36 via the rigid connector portion 351, and connected to the voice coil 33 via the fourth extension portion 352, thereby ensuring the connection strength between the rigid connector 35 and the voice coil 33 and the second diaphragm assembly 32, thereby further ensuring that the voice coil 33 drives the second diaphragm assembly 32 to vibrate during the vibration process.

[0140] In one embodiment, the housing 1 includes a first shell 11 and a second shell 12, the first shell 11 is provided with a sound outlet 111, the outer periphery of the outer folding ring 313 and the outer periphery of the diaphragm 34 are both connected to the first shell 11, the magnetic yoke 21 is connected to the second shell 12, and the outer periphery of the second diaphragm assembly 32 is clamped between the first shell 11 and the second shell 12.

[0141] In this embodiment, if Figures 3 to 6 , Fig. 9As shown, by setting the outer shell 1 as a first shell 11 and a second shell 12, it is convenient to use the first shell 11 to fix the outer periphery of the first diaphragm assembly 31 and the diaphragm 34, and use the second shell 12 to install and fix the magnetic circuit system 2, and at the same time use the first shell 11 and the second shell 12 to install and fix the outer periphery of the second diaphragm assembly 32.

[0142] It can be understood that the outer periphery of the outer fold ring 313 of the first diaphragm assembly 31 and the outer periphery of the diaphragm 34 are both connected to the first shell 11, the magnetic yoke 21 is connected to the second shell 12, and the outer periphery of the second diaphragm assembly 32 is clamped between the first shell 11 and the second shell 12.

[0143] In one embodiment, if Figures 3 to 12 As shown, the vibration system 3 also includes a centering support plate 36, which includes an external fixing portion 361, an internal fixing portion 362 and a vibration arm 363 connecting the external fixing portion 361 and the internal fixing portion 362, the external fixing portion 361 is clamped between the second shell 12 and the outer periphery of the second diaphragm assembly 32, the rigid connecting member 35 is arranged on the internal fixing portion 362, the internal fixing portion 362 is connected to the voice coil 33, and is electrically connected to the lead of the voice coil 33.

[0144] In this embodiment, the housing 1 can be a plastic housing or a metal housing, that is, the first housing 11 and the second housing 12 can both be plastic housings or metal housings. Of course, in other embodiments, one of the first housing 11 and the second housing 12 of the housing 1 is a plastic housing and the other is a metal housing, etc., which is not limited here.

[0145] Optionally, the second shell 12 of the housing 1 is an integrally formed structure with the magnetic yoke 21. It is understandable that when the second shell 12 is a plastic shell, the second shell 12 and the magnetic yoke 21 are integrally formed by injection molding; when the second shell 12 is a metal shell, the second shell 12 and the magnetic yoke 21 are integrally formed, which is not limited here.

[0146] In one embodiment, the first shell 11 may be a metal shell, and the second shell 12 may be a metal shell.

[0147] In order to further improve the connection stability between the first housing 11 and the second housing 12 or the magnetic yoke 21, in one embodiment, as shown in FIG. Figure 6 As shown, the first housing 11 is provided with a welding portion 121 extending toward the magnetic yoke 21, and the welding portion 121 is welded to the magnetic yoke 21 or the second housing 12. In another embodiment, as Figure 6 As shown, the magnetic yoke 21 or the second shell 12 is provided with a welding portion 121 extending toward the first shell 11 , and the welding portion 121 is welded to the outer wall of the first shell 11 .

[0148] Of course, in another embodiment, the sound-generating device 100 further includes a metal welding sheet, one end of which is welded to the magnetic yoke 21 or the second shell 12, and the other end of which is welded to the outer wall of the first shell 11. It can be understood that the connection stability between the first shell 11 and the second shell 12 or the magnetic yoke 21 can be further improved by the metal welding sheet.

[0149] In one embodiment, the first shell 11 has a side wall 112 and an inner bending portion 113 formed by bending and extending inward from one end of the side wall 112 away from the second shell 12, the outer peripheries of the outer folding ring 313 and the diaphragm 34 are both connected to the inner bending portion 113, and the outer periphery of the second diaphragm assembly 32 is clamped between one end of the side wall 112 away from the inner bending portion 113 and the second shell 12; wherein the sound outlet hole 111 is provided in the side wall 112 or the inner bending portion 113.

[0150] In this embodiment, if Figures 3 to 5 As shown, by setting the first shell 11 to have a side wall 112 and an inner bending portion 113 set at an angle, the first diaphragm assembly 31 and the diaphragm 34 are installed and fixed by using the inner bending portion 113 of the first shell 11, and at the same time, the side wall 112 of the first shell 11 cooperates with the second shell 12 to clamp and fix the outer periphery of the second diaphragm assembly 32 and the centering support piece 36, that is, the outer periphery of the folding ring portion 321 of the second diaphragm assembly 32 and the outer fixing portion 361 of the centering support piece 36 are clamped between one end of the side wall 112 away from the inner bending portion 113 and the second shell 12.

[0151] It can be understood that the outer fixing portion 361 of the centering support 36 is located between the outer periphery of the folding ring portion 321 of the second diaphragm assembly 32 and the second housing 12, and the other end of the second housing 12 is connected to the magnetic yoke 21. In this embodiment, the inner bending portion 113 of the first housing 11 is formed by bending and extending the end of the side wall 112 away from the second housing 12 toward the inside, that is, the inner bending portion 113 and the side wall 112 of the first housing 11 are an integrally formed structure, which can ensure the structural strength of the first housing 11, which is not limited here.

[0152] In order to further increase the contact area between the first diaphragm assembly 31 and the first shell 11 and improve the connection stability and waterproof sealing, the outer periphery of the outer folding ring 313 of the first diaphragm assembly 31 is bent and extended to form a third flange 3131, and the third flange 3131 is connected to the outer wall surface of the side wall 112 of the first shell 11.

[0153] In this embodiment, the outer folding ring 313 of the first diaphragm assembly 31 is fixed to the inner bending portion 113 of the first shell 11, so that the first diaphragm assembly 31 is bonded and fixed to the maximum outer shape of the shell 1, so that the product outer dimensions can be used to increase the effective vibration area of ​​the product. At the same time, the magnetic yoke 21 of the magnetic circuit system 2 is fixed to the second shell 12, and the outer periphery of the second diaphragm assembly 32 is sandwiched between the first shell 11 and the second shell 12. The height of the shell 1 can be adjusted accordingly to increase or decrease according to the requirements of the product amplitude, so that the sound cavity 4 between the diaphragm 34 and the second diaphragm assembly 32 can adapt to the needs of different products.

[0154] Optionally, the sound outlet 111 is disposed on the side wall 112 or the inner bending portion 113 , which is not limited here.

[0155] In one embodiment, if Figure 4 and Figure 5 As shown, the inner bending portion 113 includes an upper surface, a lower surface and an inner side surface. The upper surface and the lower surface are disposed opposite to each other. The inner side surface connects the upper surface and the lower surface and is located at an end of the inner bending portion 113 away from the side wall 112 .

[0156] In this embodiment, if Figure 4 and Figure 5 As shown, the outer periphery of the outer fold ring 313 is connected to the upper surface, and the outer periphery of the diaphragm 34 is connected to the lower surface. This arrangement can not only achieve the fixation of the first diaphragm assembly 31 and the diaphragm 34, but also ensure the distance between the first diaphragm assembly 31 and the diaphragm 34, thereby avoiding interference and other problems during the vibration process.

[0157] Of course, in other embodiments, the outer periphery of the outer folding ring 313 of the first diaphragm assembly 31 is connected to the upper surface, and the outer periphery of the diaphragm 34 is connected to the inner surface; or, the outer periphery of the outer folding ring 313 is connected to the upper surface, and the outer periphery of the diaphragm 34 is clamped between the outer periphery of the outer folding ring 313 and the upper surface; or, the outer periphery of the outer folding ring 313 is connected to the inner surface, and the outer periphery of the diaphragm 34 is connected to the lower surface; or, the outer peripheries of the outer folding ring 313 and the diaphragm 34 are both connected to the inner surface, which is not limited here.

[0158] It is understandable that the outer connection portion 341 of the diaphragm 34 can be connected to the lower surface, inner side surface or upper surface of the inner bending portion 113, etc., which is not limited here. In this embodiment, when the outer connection portion 341 of the diaphragm 34 and the outer periphery of the outer folding ring 313 are simultaneously connected to the upper surface of the inner bending portion 113, the outer connection portion 341 of the diaphragm 34 is located between the outer periphery of the outer folding ring 313 and the upper surface of the inner bending portion 113, which is not limited here.

[0159] In one embodiment, the central magnetic portion 22 includes a first central magnet 221 , a central magnetic plate 222 and a second central magnet 223 which are stacked. The first central magnet 221 is connected to the magnetic yoke 21 , and the inner side of the inner fold ring 311 is connected to the second central magnet 223 .

[0160] In this embodiment, if Figures 3 to 5 , Fig. 9 As shown, by setting the central magnetic part 22 as a magnetic structure, the first central magnet 221, the central magnetic plate 222 and the second central magnet 223 are stacked in sequence on the magnetic yoke 21 along the vertical direction. It can be understood that the first central magnet 221 and the second central magnet 223 are magnetized along the vibration direction of the vibration system 3, and the magnetization direction of the first central magnet 221 is opposite to the magnetization direction of the second central magnet 223. In this way, the magnetic flux of the first central magnet 221 and the second central magnet 223 are gathered on the central magnetic plate 222 by the magnetic conductive effect of the central magnetic plate 222, and are transmitted to the magnetic gap 24 by the central magnetic plate 222, so that the central magnetic part 22 generates a magnetic field with a strong magnetic field strength passing through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24, increasing the number of magnetic flux passing through the voice coil 33, increasing the magnetic field force on the voice coil 33, and effectively improving the BL value.

[0161] Optionally, the first central magnet 221 is an integral plate-shaped structure. Figures 3 to 5 , Fig. 9 As shown, by configuring the first central magnet 221 as an integral plate-shaped structure, it is convenient for processing, assembling and magnetizing the first central magnet 221, thereby effectively improving production and assembly efficiency.

[0162] Of course, in other embodiments, the first central magnet 221 includes a plurality of first central magnets 221, the plurality of first central magnets 221 are adjacent and laid flat between the central magnetic conductive plate 222 and the magnetic conductive yoke 21, the plurality of first central magnets 221 are magnetized along the vibration direction of the vibration system 3, and the magnetization directions of the plurality of first central magnets 221 are the same. Optionally, the magnetic poles of the plurality of first central magnets 221 on the side close to the central magnetic conductive plate 222 are the same.

[0163] Optionally, the central magnetic conductive plate 222 of the central magnetic portion 22 can be an integral square plate-like structure and be located between the first central magnet 221 and the second central magnet 223; or, the central magnetic conductive plate 222 includes multiple central magnetic conductive plates 222, which are adjacent to and arranged in parallel between the first central magnet 221 and the second central magnet 223, so that the multiple central magnetic conductive plates 222 cooperate to form a square plate-like structure, which is not limited here.

[0164] Optionally, the second central magnet 223 is an integral plate-shaped structure. Figures 3 to 5 , Fig. 9 As shown, by configuring the second central magnet 223 as an integral plate-shaped structure, the processing, assembly and magnetization of the second central magnet 223 are facilitated, thereby effectively improving the production and assembly efficiency.

[0165] Of course, in other embodiments, the second central magnet 223 includes a plurality of second central magnets 223, the plurality of second central magnets 223 are adjacent and laid flat on the side of the central magnetic conductive plate 222 facing away from the first central magnet 221, the plurality of second central magnets 223 are magnetized along the vibration direction of the vibration system 3, and the magnetization directions of the plurality of second central magnets 223 are the same. Optionally, the magnetic poles of the plurality of second central magnets 223 close to the central magnetic conductive plate 222 are the same.

[0166] In this embodiment, the inner side of the inner fold ring 311 of the first diaphragm assembly 31 is connected to the second central magnet 223. In order to prevent the second central magnet 223 from interfering with the inner fold ring 311 when the inner fold ring 311 vibrates, in one embodiment, Figure 4 and Figure 5 As shown, the edge of the second central magnet 223 is provided with an avoidance structure.

[0167] In the present embodiment, the avoidance structure surrounds the periphery of the second center magnet 223 on the side facing away from the center magnetic plate 222, that is, the avoidance structure is an integral annular inclined surface. Of course, in other embodiments, the avoidance structure includes multiple avoidance structures, which are arranged at intervals and surround the periphery of the second center magnet 223 on the side facing away from the center magnetic plate 222. In this case, two adjacent avoidance structures are not connected and have a certain spacing. Alternatively, the avoidance structure includes multiple, adjacent avoidance structures are connected end to end to form a closed annular structure, and surround the periphery of the second center magnet 223 on the side facing away from the center magnetic plate 222. In this case, the adjacent avoidance structures in the multiple avoidance structures are adjacent and form an annular structure. Optionally, the angles formed by the multiple avoidance structures and the surface of the second center magnet 223 on the side facing away from the center magnetic plate 222 can be the same, different, or at least partially the same, which is not limited here.

[0168] Optionally, the avoidance structure may be at least one of an inclined surface, a rounded corner, a chamfer, and a step structure.

[0169] In one embodiment, the angle formed between the avoidance structure and the surface of the second central magnet 223 facing away from the central magnetic plate 222 is greater than 90° and less than 180°. In this embodiment, the angle formed between the avoidance structure and the surface of the second central magnet 223 facing away from the central magnetic plate 222 can be further selected to be in the range of 100° to 150°, which is not limited here. Optionally, the angle is 100°, 110°, 120°, 130°, 140°, 150°, etc., which is not limited here.

[0170] In one embodiment, the side magnet portion 23 includes a stacked side magnet 231 and a side magnetic conductive plate 232, the side magnet 231 is connected to the magnetic conductive yoke 21, the side magnetic conductive plate 232 is arranged opposite to the center magnetic conductive plate 222, and the side magnet 231 is magnetized along the vibration direction of the vibration system 3, and the magnetization direction of the side magnet 231 is opposite to the magnetization direction of the first center magnet 221.

[0171] Understandable, such as Figures 3 to 5 , Fig. 9 As shown, the side magnets 231 and the side magnetic conductive plates 232 of the side magnetic part 23 are stacked on the magnetic conductive yoke 21, and the side magnets 231 are connected to the magnetic conductive yoke 21. The side magnets 231 and the side magnetic conductive plates 232 of the side magnetic part 23 are located outside the central magnetic part 22 and are spaced to form a magnetic gap 24. In this embodiment, the side magnets 231 can be selected as permanent magnets, and the side magnetic conductive plates 232 can be selected as magnetic conductive plate structures, which are not limited here.

[0172] In this embodiment, the edge magnetic part 23 includes a plurality of edge magnetic parts 23, which are arranged around the outer side of the central magnetic part 22 and are spaced apart from the central magnetic part 22 to form a magnetic gap 24. At this time, the adjacent edge magnetic parts 23 are spaced apart to form an escape space 233, so that the escape space 233 is used to provide an installation escape space and a movable space for the rigid connector 35 and the inner fixed part 362 of the centering support. Optionally, there are multiple edge magnets 231 and edge magnetic conductive plates 232, and they are arranged one by one.

[0173] like Fig.16 and Fig.17 As shown, the present invention further proposes a sound module 600, which includes the above-mentioned sound device 100. The specific structure of the sound device 100 refers to the aforementioned embodiment. Since the sound module 600 adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the aforementioned embodiments, which will not be described one by one here.

[0174] In one embodiment, the sound module 600 also includes a module shell 500, the module shell 500 is provided with an installation cavity 510 and a sound outlet 520 connected to the installation cavity 510, the sound device 100 is arranged in the installation cavity 510, and a front sound cavity 530 is formed between the first diaphragm assembly 31 of the sound device 100 and the module shell 500, and the front sound cavity 530 is connected to the sound outlet 520; wherein, the sound cavity 4 of the sound device 100 is connected to the sound outlet 520 through the front sound cavity 530; or, the module shell 500 is also provided with a sound outlet channel, and the sound cavity 4 of the sound device 100 is connected to the sound outlet 520 through the sound outlet channel; or, the sound outlet hole 111 of the sound device 100 is directly connected to the sound outlet 520.

[0175] In this embodiment, the sound module 600 can be a front sound structure or a side sound structure. When the sound module 600 is a front sound structure, the sound outlet 520 of the module shell 500 is arranged directly opposite to the first diaphragm assembly 31 of the sound device 100. It can be understood that the sound outlet 111 on the outer shell 1 of the sound device 100 is arranged on the inner bending portion 113 of the first shell 11, and the sound outlet 111 is arranged directly opposite to the sound outlet 520 of the module shell 500. At this time, the sound outlet 111 is connected to the front sound cavity 530; or, the sound outlet 111 is connected to the sound outlet 520 through the sound outlet channel of the module shell 500, which is not limited here.

[0176] Of course, the sound outlet hole 111 on the housing 1 can also be set on the side wall 112 of the first shell 11, and the sound outlet hole 111 is connected to the sound outlet 520 through the sound outlet channel of the module shell 500, which is not limited here.

[0177] It is understandable that when the sound module 600 is a side sound structure, the sound outlet 520 of the module housing 500 is located on one side of the first diaphragm assembly 31 of the sound device 100. It is understandable that the sound outlet 111 on the housing 1 of the sound device 100 is arranged on the inner bending portion 113 of the first housing 11, and the sound outlet 111 can be connected to the sound outlet 520 through the sound outlet channel of the module housing 500, which is not limited here.

[0178] Of course, the sound hole 111 on the shell 1 can also be set on the side wall 112 of the first shell 11. In this case, the sound hole 111 is connected to the sound outlet 520 through the sound outlet channel of the module shell 500; or, the sound hole 111 and the sound outlet 520 of the module shell 500 are arranged to be directly connected, which is not limited here.

[0179] In one embodiment, the sound module 600 further includes a flexible circuit board, one end of the flexible circuit board is electrically connected to the centering support piece 36 of the sound device 100, and the other end of the flexible circuit board is used to connect to an external power supply.

[0180] It can be understood that the flexible circuit board is used to connect the external circuit to the sound device 100. The flexible circuit board is provided with an inner pad and an outer pad, the inner pad of the flexible circuit board is connected to the outer pad 365 of the centering support piece 36 of the sound device 100, and the outer pad of the flexible circuit board is used to connect to the external terminal.

[0181] In this embodiment, the module housing 500 has an installation cavity 510, the sound device 100 is disposed in the installation cavity 510 of the module housing 500, and at least one end of the flexible circuit board connected to the sound device 100 is located in the installation cavity 510 of the module housing 500. Of course, in other embodiments, the flexible circuit board can also be entirely disposed in the installation cavity 510 of the module housing 500, which is not limited here.

[0182] The present invention further 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 above-mentioned embodiment. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0183] In this embodiment, the electronic device further includes a device housing, and the sound generating device 100 and the flexible circuit board are both arranged in the device housing. It can be understood that the electronic device can be a headset, a mobile phone, a smart wearable device, etc., which is not limited here.

[0184] The present invention further provides an electronic device, which includes the above-mentioned sound module 600. The specific structure of the sound module 600 refers to the above-mentioned embodiment. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0185] It is understandable that the electronic device can be a headset, a mobile phone, a smart wearable device, etc., which is not limited here. In this embodiment, the electronic device also includes a device housing, and the sound module 600 is arranged in the device housing.

[0186] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that: The sound-generating device comprises: A housing, wherein the housing is provided with a sound outlet hole; A magnetic circuit system, the magnetic circuit system is connected to the housing, the magnetic circuit system includes a magnetic yoke and a central magnetic portion and a side magnetic portion provided on the magnetic yoke, the side magnetic portion is located outside the central magnetic portion and forms a magnetic gap with the central magnetic portion, the central magnetic portion includes a first central magnet, a central magnetic plate and a second central magnet arranged in a stacked manner, the first central magnet is connected to the magnetic yoke, the side magnetic portion includes a plurality of side magnetic portions, and an escape space is formed between two adjacent side magnetic portions; and A vibration system, the vibration system comprising a first diaphragm assembly, a second diaphragm assembly, a voice coil, a diaphragm and a rigid connector, the first diaphragm assembly comprising an inner folding ring, a first vibration plate and an outer folding ring connected in sequence, the inner side of the inner folding ring being connected to the second central magnet, the outer periphery of the outer folding ring being connected to the housing, one end of the voice coil being connected to the first diaphragm assembly, the other end of the voice coil being suspended in the magnetic gap, the diaphragm and the second diaphragm assembly being arranged in sequence on the side of the first diaphragm assembly facing the magnetic yoke and being located on the outside of the voice coil, the outer edges of the diaphragm and the second diaphragm assembly being connected to the housing, the inner edge of the diaphragm being connected to the inner edge of the second diaphragm assembly, so as to form a sound cavity connected to the sound outlet between the diaphragm and the second diaphragm assembly, the second diaphragm assembly having a first extension portion extending to the avoidance space, the diaphragm having a second extension portion extending to the avoidance space, the second extension portion being correspondingly connected to the first extension portion; Wherein, the first center magnet and the second center magnet are both magnetized along the vibration direction of the vibration system and the magnetization directions are opposite, the rigid connecting member is arranged in the avoidance space, and the rigid connecting member includes a rigid connecting portion and a fourth extending portion extending from the rigid connecting portion toward the voice coil, the rigid connecting portion is connected to the first extending portion, and the fourth extending portion is connected to the voice coil.

2. The sound generating device according to claim 1, characterized in that: The second diaphragm assembly includes a folding ring portion and a second vibration plate, wherein the outer periphery of the folding ring portion is connected to the housing, and the second vibration plate includes a main body portion connected to the inner edge of the folding ring portion and a first bending portion formed by the main body portion bending and extending toward the diaphragm, wherein the first bending portion is connected to the inner edge of the diaphragm; Wherein, a side of the main body away from the folding ring portion extends toward the avoidance space to form the first extension portion.

3. The sound-generating device according to claim 2, characterized in that: An inclined portion is formed at the connection between the main body and the first bending portion, and the inclined portion is arranged at an angle with the vibration direction of the vibration system; And / or, the outer periphery of the folded ring portion is bent to form a first flange, and the first flange is connected to the outer wall of the shell.

4. The sound generating device according to claim 2, characterized in that: The diaphragm is a flexible member, and includes an outer connection portion, a deformation portion, and an inner connection portion connected in sequence, wherein the outer periphery of the outer connection portion is connected to the outer shell, the inner edge of the inner connection portion is connected to the first bending portion, and the deformation portion is in a bending shape; Wherein, the inner connecting portion corresponds to the first extending portion and extends toward the avoidance space to form the second extending portion.

5. The sound generating device according to claim 4, characterized in that: The inner edge of the inner connecting portion is bent and extended toward the first bending portion to form a second flange, and the second flange is connected to the first bending portion; And / or, along the vibration direction of the vibration system, the projection width L1 of the deformation portion is greater than or equal to the projection width L2 of the folding ring portion, and the ratio of L1 to L2 is 1:1 to 3:1; And / or, the deformation portion protrudes in a direction away from the first diaphragm assembly, the folding ring portion protrudes in a direction close to the first diaphragm assembly, and the deformation portion and the folding ring portion are staggered in a direction perpendicular to the vibration system; And / or, the inner fold ring and the outer fold ring both protrude in a direction away from the magnetic circuit system; And / or, the compliance of the diaphragm is greater than the compliance of the folding ring portion.

6. The sound generating device according to claim 1, characterized in that: The effective vibration area Sd1 of the diaphragm is smaller than the effective vibration area Sd2 of the second diaphragm assembly, and the ratio of Sd1 to Sd2 is 1:1.5 to 1:

3.

7. The sound generating device according to claim 1, characterized in that: The vibration system further includes a centering support plate, the centering support plate includes an outer fixing portion, an inner fixing portion, and a vibration arm connecting the outer fixing portion and the inner fixing portion, the outer fixing portion is connected to the housing, and the rigid connecting member is provided at the inner fixing portion; The second diaphragm assembly comprises a folding ring portion and a second vibration plate connected to each other, the outer periphery of the folding ring portion is connected to the housing, and the inner edge of the second vibration plate is connected to the inner edge of the diaphragm; The inner fixing portion is connected to the second vibration plate and the voice coil, and is electrically connected to the lead wire of the voice coil.

8. The sound generating device according to claim 1, characterized in that: The outer shell includes a first shell and a second shell, the first shell is provided with the sound outlet hole, the outer periphery of the outer folding ring and the outer periphery of the diaphragm are connected to the first shell, the magnetic yoke is connected to the second shell, and the outer periphery of the second diaphragm assembly is clamped between the first shell and the second shell.

9. The sound generating device according to any one of claims 1 to 8, characterized in that: The side magnet part includes stacked side magnets and side magnetic conductive plates, the side magnets are connected to the magnetic conductive yoke, the side magnetic conductive plates are arranged opposite to the center magnetic conductive plates, and the magnetization direction of the side magnets is opposite to that of the first center magnet.

10. A sound module, characterized in that: The sound module comprises: A module housing, wherein the module housing is provided with a mounting cavity and a sound outlet communicating with the mounting cavity; and The sound-generating device according to any one of claims 1 to 9, wherein the sound-generating device is disposed in the installation cavity, a front sound cavity is formed between the first diaphragm assembly of the sound-generating device and the module housing, and the front sound cavity is connected to the sound outlet; Among them, the sound cavity of the sound-emitting device is connected with the sound outlet through the front sound cavity; or, the module shell is also provided with a sound outlet channel, and the sound cavity of the sound-emitting device is connected with the sound outlet through the sound outlet channel; or, the sound outlet hole of the sound-emitting device is connected directly with the sound outlet.

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