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 first vibrating diaphragm assembly of the sound production device comprises an inner folding ring, a first vibrating plate and an outer folding ring which are connected in sequence, the inner side of the inner folding ring is connected with a magnetic circuit system, the outer periphery of the outer folding ring is connected with a shell, and a voice coil is connected with the first vibrating plate; the diaphragm and the second diaphragm assembly are sequentially arranged on the side, facing the voice coil, of the first diaphragm assembly and located on the outer side of the voice coil, the second diaphragm assembly comprises a folded ring part and a second vibrating plate which are connected, the outer edges of the diaphragm and the folded ring part are connected with the shell, the inner edge of the diaphragm and the inner edge of the second vibrating plate are connected with the first vibrating plate, and the first vibrating plate is connected with the second vibrating plate. A sound production cavity communicated with the sound outlet hole is formed between the diaphragm and the second vibrating diaphragm assembly; wherein 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 the Sd1 to the Sd2 is 1: 1.5-1: 3. 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, and the magnetic circuit system is provided with a magnetic gap; and

[0008] A vibration system, the vibration system comprising a first diaphragm assembly, a second diaphragm assembly, a voice coil and a diaphragm, 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 magnetic circuit system, the outer periphery of the outer folding ring being connected to the housing, one end of the voice coil being connected to the first vibration plate, 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 a side of the first diaphragm assembly facing the voice coil and being located on the outer side of the voice coil, the second diaphragm assembly comprising a folding ring portion and a second vibration plate connected thereto, the outer edges of the diaphragm and the folding ring portion being both connected to the housing, the inner edge of the diaphragm and the inner edge of the second vibration plate being both connected to the first vibration plate, so as to form a sound-emitting cavity connected to the sound outlet hole between the diaphragm and the second diaphragm assembly;

[0009] 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.

[0010] In one embodiment, the second vibration plate includes a main body portion, an inclined portion and a first bent portion which are connected in sequence, the main body portion is connected to the inner edge of the folding ring portion, the first bent portion is connected to the inner edge of the first vibration plate and / or the diaphragm, and the inclined portion is arranged at an angle to the vibration direction of the vibration system.

[0011] In one embodiment, the diaphragm is a flexible member, and the diaphragm includes an external connection part, a deformation part and an internal connection part connected in sequence, the outer periphery of the external connection part is connected to the outer shell, the inner edge of the internal connection part is connected to the first vibration plate and / or the first bending part, and the deformation part is bent.

[0012] In one embodiment, the inner edge of the inner connecting portion extends along the inner surface of the first vibration plate to form a second flange, and the first bent portion is adjacent to one end of the first vibration plate to form a straight section extending along the inner surface of the first vibration plate;

[0013] Wherein, the second flange is sandwiched between the first vibration plate and the straight section; or, the straight section is sandwiched between the second flange and the first vibration plate; or, the second flange and the straight section are both connected to the first vibration plate.

[0014] In one embodiment, 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 deformation segment of the folding ring portion, and the ratio of L1 to L2 is 1:1 to 3:1;

[0015] And / or, the deformation portion protrudes in a direction away from the first diaphragm assembly, the deformation segment of the folding ring portion protrudes in a direction close to the first diaphragm assembly, and the deformation portion and the deformation segment of the folding ring portion are staggered in a direction perpendicular to the vibration system;

[0016] And / or, the inner fold ring and the outer fold ring both protrude in a direction away from the magnetic circuit system;

[0017] And / or, the compliance of the diaphragm is greater than or equal to the compliance of the folding ring portion.

[0018] In one embodiment, 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 the magnetic gap with the central magnetic portion, the inner side of the inner fold is connected to the central magnetic portion, the side magnetic portion includes a plurality of side magnetic portions, and an escape space is formed between two adjacent side magnetic portions;

[0019] The second vibration plate has a first extension portion extending to the avoidance space, the diaphragm has a second extension portion extending to the avoidance space, and the second extension portion is correspondingly connected to the first extension portion; or, the voice coil has a first protrusion portion extending to the avoidance space, the central magnetic portion has a second protrusion portion extending to the avoidance space, and the first protrusion portion and the second protrusion portion are arranged opposite to each other.

[0020] In one embodiment, the first vibration plate is bent and extended toward the voice coil to form a second bent portion, and the second bent portion is connected to the voice coil; or, the first diaphragm assembly further includes a first bracket, and two ends of the first bracket are respectively connected to the first vibration plate and the voice coil;

[0021] And / or, the first vibration plate is provided with a protrusion close to the diaphragm, and the inner edge of the diaphragm and the inner edge of the second vibration plate are both connected to the protrusion; or, the first vibration membrane assembly further includes a second bracket, one end of the second bracket is connected to the first vibration plate, and the other end of the second bracket is connected to the inner edge of the diaphragm and the inner edge of the second vibration plate;

[0022] And / or, the outer periphery of the folding ring portion is bent to form a first flange, and the first flange is connected to the outer wall of the shell;

[0023] And / or, the outer periphery of the outer fold ring is bent and extended to form a third flange, and the third flange is connected to the outer wall of the outer shell.

[0024] In one embodiment, the vibration system further includes a centering support plate, the centering support plate includes 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 outer shell, the internal fixing portion includes a main body portion and a third extension portion extending from the main body portion toward the voice coil, the main body portion is connected to the second vibration plate, the third extension portion is connected to the voice coil, and the third extension portion or the main body portion is provided with an internal solder pad electrically connected to the lead of the voice coil.

[0025] In one embodiment, the magnetic circuit system includes a magnetic yoke and a central magnetic portion and a side magnetic portion provided on the magnetic yoke, wherein the side magnetic portion is located outside the central magnetic portion and forms the magnetic gap with the central magnetic portion, and the central magnetic portion includes a first central magnet, a central magnetic plate and a second central magnet arranged in a stacked manner, wherein the first central magnet is connected to the magnetic yoke, and the inner side of the inner fold ring is connected to the second central magnet;

[0026] Wherein, the first central magnet and the second central magnet are both magnetized along the vibration direction of the vibration system and in opposite directions.

[0027] 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.

[0028] 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 circuit system is connected to the second shell, and the outer periphery of the folding ring is clamped between the first shell and the second shell.

[0029] The present invention further provides a sound module, the sound module comprising:

[0030] A module housing, wherein the module housing is provided with a mounting cavity and a sound outlet communicating with the mounting cavity; and

[0031] 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;

[0032] 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.

[0033] 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 housing, and setting a magnetic gap in the magnetic circuit system, and setting a first diaphragm assembly, a second diaphragm assembly, a voice coil and a diaphragm in the vibration system, so that the inner side of the inner folding ring of the first diaphragm assembly is connected to the magnetic circuit system, the outer periphery of the outer folding ring is connected to the housing, 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. In this way, 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 to vibrate, thereby achieving At the same time, the diaphragm and the second diaphragm assembly are sequentially arranged below the first diaphragm assembly and located on the outside of the voice coil, and the first diaphragm assembly is arranged as an inner folding ring, a first vibration plate and an outer folding ring connected in sequence, so that the inner side of the inner folding ring is connected to the magnetic circuit system, and the outer periphery of the outer folding ring is connected to the outer shell, so that one end of the voice coil is connected to the first vibration plate, and the other end of the voice coil is suspended in the magnetic gap, and the second diaphragm assembly is arranged as a folding ring part and a second vibration plate connected, so that the outer edges of the diaphragm and the folding ring part are both connected to the outer shell, and the inner edge of the diaphragm and the inner edge of the second vibration plate are both connected to the outer shell. The first vibration plate is connected to form a sound cavity between the diaphragm and the second diaphragm assembly, and a sound outlet hole is set in the shell so that the sound cavity is connected to the sound outlet hole, so that the voice coil drives the diaphragm and the second diaphragm assembly to vibrate through the first vibration plate of the first diaphragm assembly. In this way, the diaphragm and the second diaphragm assembly are added to the conventional speaker. When the sound device is working, the voice coil drives the diaphragm and the second diaphragm assembly to vibrate through the first vibration plate of the first diaphragm assembly, 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 sound device. The effective vibration area during vibration can improve the performance of the sound-generating device; further, by setting the effective vibration area Sd1 of the diaphragm to be smaller than the effective vibration area Sd2 of the second diaphragm assembly, the ratio of Sd1 to Sd2 is made to be 1:1.5~1:3. In this way, when the voice coil drives the diaphragm and the second diaphragm assembly to vibrate through the first vibration plate, the diaphragm vibrates and deforms, so that the diaphragm has a reverse effect on the volume of pushed air, and the second diaphragm assembly has a positive effect on the volume of pushed air. The change in the volume of the sound-generating cavity is used to increase the volume of pushed air during work, thereby further increasing the effective vibration area of ​​the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1A schematic structural diagram of an embodiment of a sound-generating device provided by the present invention;

[0036] Figure 2 An exploded schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0037] Figure 3 A cross-sectional schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0038] Figure 4 A cross-sectional schematic diagram of another viewing angle of an embodiment of a sound-generating device provided by the present invention;

[0039] Figure 5 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 6 A schematic diagram of a top view of the structure of the connection between the magnetic circuit system, the centering support and the voice coil in an embodiment of the sound-generating device provided by the present invention;

[0041] Figure 7 It is an exploded schematic diagram of a magnetic circuit system in one embodiment of the present invention;

[0042] Figure 8 is an exploded schematic diagram of a first diaphragm assembly in one embodiment of the present invention;

[0043] Fig. 9 It is a schematic structural diagram of a first vibration plate in one embodiment of the present invention;

[0044] Fig.10 It is a schematic diagram of the structure of the second vibration plate in one embodiment of the present invention;

[0045] Fig.11 is a schematic structural diagram of a second vibration plate in another embodiment of the present invention;

[0046] Fig.12 A schematic diagram of the structure of a diaphragm in one embodiment of the present invention;

[0047] Fig.13 A schematic diagram of the structure of a diaphragm in another embodiment of the present invention;

[0048] Fig.14 It is a structural schematic diagram of a centering support piece in one embodiment of the present invention;

[0049] Fig.15 A cross-sectional schematic diagram of an embodiment of a sound module provided by the present invention;

[0050] Fig.16 A cross-sectional schematic diagram from another perspective of an embodiment of the sound module provided by the present invention.

[0051] Description of Figure Numbers:

[0052] 100. Sound-generating device; 1. Shell; 11. First shell; 111. Sound-generating hole; 112. Side wall; 113. Inner bending portion; 12. Second shell; 121. Welding portion; 2. Magnetic circuit system; 21. Magnetic yoke; 211. Avoidance structure; 22. Center magnetic portion; 221. First center magnet; 222. Center magnetic plate; 223. Second center magnet; 224. Second protruding portion; 23. Side magnetic portion; 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 portion; 3122. Protruding portion; 3123. Air flow channel; 3124. Notch; 313. Outer folding ring; 3131. Third flange; 32. Second diaphragm Component; 321, folding ring; 322, second vibration plate; 3221, main body; 3222, first bending portion; 3223, inclined portion; 3224, first extension portion; 3225, straight section; 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. Centering support plate; 351. External fixing part; 352. Internal fixing part; 3521. Main body; 3522. Third extension part; 3523. Internal welding pad; 353. Vibration arm; 354. Conductive part; 41. Sound cavity; 42. First rear cavity; 43. Second rear cavity; 500. Module shell; 510. Installation cavity; 520. Sound outlet; 530. Front sound cavity; 600. Sound module.

[0053] 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

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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 conventional speaker solutions in current electronic products are difficult to take into account multiple design requirements such as high performance and lightness at the same time.

[0059] 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.

[0060] 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.

[0061] However, in the sound-emitting device 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 device 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.

[0062] 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.

[0063] 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 to the intermediate magnetic circuit of the magnetic circuit system, and because the intermediate magnetic circuit adds magnets, 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 its high performance and lightweight solutions at the same time. 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.

[0064] Please refer to Figures 1 to 14 As 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 is provided with a magnetic gap 24, the vibration system 3 includes a first diaphragm assembly 31, a second diaphragm assembly 32, a voice coil 33 and a diaphragm 34, 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 magnetic circuit system 2, the outer periphery of the outer folding ring 313 is connected to the housing 1, one end of the voice coil 33 is connected to the first vibration plate 312, the other end of the voice coil 33 is suspended in the magnetic gap 24, and the diaphragm 34 is connected to the outer periphery of the outer ring 313. 4 and the second diaphragm assembly 32 are sequentially arranged on the side of the first diaphragm assembly 31 facing the voice coil 33 and are located on the outside of the voice coil 33. The second diaphragm assembly 32 includes a folding ring portion 321 and a second vibration plate 322 connected to each other. The outer edges of the diaphragm 34 and the folding ring portion 321 are connected to the housing 1, and the inner edge of the diaphragm 34 and the inner edge of the second vibration plate 322 are connected to the first vibration plate 312, so as to form a sound cavity 41 connected to the sound outlet 111 between the diaphragm 34 and the second diaphragm assembly 32; wherein 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.

[0065] 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.

[0066] Optionally, the magnetic circuit system 2 is arranged in a square shape. 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.

[0067] In this embodiment, if Figures 2 to 7 As shown, 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 outside the central magnetic portion 22 and forms a magnetic gap 24 with the central magnetic portion 22. Optionally, the central magnetic portion 22 and the side magnetic portion 23 of the magnetic circuit system 2 can both be square structures.

[0068] 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 1 to 4 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 magnetic circuit system 2. Optionally, the inner periphery of the first diaphragm assembly 31 is connected to the central magnetic portion 22.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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; wherein the first central magnet 221 and the second central magnet 223 are both magnetized along the vibration direction of the vibration system 3 and in opposite directions.

[0073] In this embodiment, if Figures 2 to 7 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 of the central magnetic part 22 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.

[0074] It can be understood that by configuring the first diaphragm assembly 31 to be sequentially connected inner fold ring 311, first vibration plate 312 and outer fold ring 313, the inner side of the inner fold ring 311 is connected to the second central magnet 223 of the central magnetic part 22, and the outer periphery of the outer fold ring 313 is connected to the housing 1, thereby achieving fixed connection of the first diaphragm assembly 31, and at the same time improving the vibration performance and compliance of the first diaphragm assembly 31 through the inner fold ring 311 and the outer fold ring 313. Optionally, 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] In this embodiment, if Figures 1 to 4 , Figure 8 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.

[0079] Of course, in other embodiments, the first diaphragm assembly 31 may be an annular structure. It is understandable that a hollow hole is provided inside 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.

[0080] 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.

[0081] 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 1 to 4 , Figure 8 As 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.

[0082] In order to realize the electrical connection between the voice coil 33 and the external circuit. Figures 2 to 6 , Fig.14 As shown, the vibration system 3 further includes a centering support plate 35 , 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 35 is connected to the housing 1 .

[0083] It can be understood that the two ends of the centering support 35 are electrically connected to the lead wire of the voice coil 33 and the external circuit respectively. In this embodiment, the centering support 35 can be arranged at the bottom of the voice coil 33, and the centering support 35 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 35 can also be arranged at the top of the voice coil 33, and the centering support 35 is located between the voice coil 33 and the diaphragm 31, which is not limited here.

[0084] 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, that is, the diaphragm 34 and the second diaphragm assembly 32 are sequentially arranged below the first diaphragm assembly 31, 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 and the inner edge of the second diaphragm assembly 32 are connected to the first vibration plate 312 of the first diaphragm assembly 31, so as to form a sound cavity 41 between the diaphragm 34 and the second diaphragm assembly 32, and a sound outlet hole 111 is provided on the outer shell 1, so that the sound cavity 41 is connected to the sound outlet hole 111, so that the voice coil 33 drives the diaphragm 34 and the second diaphragm assembly 32 to vibrate through the first vibration plate 312.

[0085] 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 diaphragm 34 and the second diaphragm assembly 32 to vibrate through the first vibration plate 312, so that the volume between the diaphragm 34 and the second diaphragm assembly 32 changes relatively to promote the air in the sound cavity 41 to flow smoothly through the sound outlet 111. At this time, the sound-emitting device 100 adds the diaphragm 34 and the second diaphragm assembly 32 on the basis of the 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.

[0086] In the present embodiment, the structure of the second diaphragm assembly 32 may be a diaphragm structure or other structure capable of vibrating and producing sound, which is not limited here. The structure of the diaphragm 34 may be a structure capable of vibrating and deforming, and optionally, the diaphragm 34 is a flexible member. The diaphragm 34 is made of a flexible material such as a single-layer PEEK (polyetheretherketone) film, a composite PEEK (polyetheretherketone) film, etc. It can be understood that by connecting the inner edge of the diaphragm 34 and the inner edge of the second diaphragm assembly 32 to the first vibration plate 312, the voice coil 33 drives the diaphragm 34 and the second diaphragm assembly 32 to vibrate through the first vibration plate 312. The first vibration plate 312 may be made of a metal material such as stainless steel or other materials with a certain strength such as carbon fiber, which is not limited here.

[0087] It should be noted that the sound cavity 41 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 41 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.

[0088] Optionally, the effective vibration area Sd1 of the diaphragm 34 is smaller than the effective vibration area Sd2 of the second diaphragm assembly 32. In this embodiment, the ratio of Sd1 to Sd2 is 1:1.5 to 1:3. Optionally, 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.

[0089] It can be understood that such a configuration allows the diaphragm 34 to vibrate and deform when the voice coil 33 drives the diaphragm 34 and the second diaphragm assembly 32 to vibrate through the first vibration plate 312, so that the diaphragm 34 has a counter effect on the volume of pushed air, and the second diaphragm assembly 32 has a positive effect on the volume of pushed air. The volume change of the sound cavity 41 is used to increase the volume of pushed air during operation, thereby increasing the effective vibration area of ​​the product.

[0090] The sound-generating device 100 of the present invention is configured by accommodating the magnetic circuit system 2 and the vibration system 3 in the housing 1, and configuring the magnetic circuit system 2 to include 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 include a first diaphragm assembly 31, a second diaphragm assembly 32, a voice coil 33 and a diaphragm 34, so that the inner side of an inner folding ring 311 of the first diaphragm assembly 31 is connected to the central magnetic portion 22 of the magnetic circuit system 2, the outer periphery of an outer 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, so that the sound-generating device 100 of the present invention is configured by accommodating the magnetic circuit system 2 and the vibration system 3 in the housing 1, and configuring the magnetic circuit system 2 to include 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 include a first diaphragm assembly 31, a second diaphragm assembly 32, a voice coil 33 and a diaphragm 34, so that the inner side of an inner folding ring 311 of the first diaphragm assembly 31 is connected to the central magnetic portion 22 of the magnetic circuit Current is passed through the 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; at the same time, 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, and the second diaphragm assembly 32 is arranged as a connected folding ring portion 321 and a second vibration plate 322, so that the outer edges of the diaphragm 34 and the folding ring portion 321 are connected to the housing 1, and the inner edge of the diaphragm 34 and the inner edge of the second vibration plate 322 are connected to the first vibration plate 312 of the first diaphragm assembly 31, so as to achieve sound generation between the diaphragm 34 and the second diaphragm assembly 32 A sound cavity 41 is formed between the two sides of the housing 1, and a sound outlet hole 111 is provided in the housing 1, so that the sound cavity 41 is connected with the sound outlet hole 111, so that the voice coil 33 drives the diaphragm 34 and the second diaphragm assembly 32 to vibrate through the first vibration plate 312. In this way, the diaphragm 34 and the second diaphragm assembly 32 are added to the conventional speaker. When the sound device 100 is working, the voice coil 33 drives the diaphragm 34 and the second diaphragm assembly 32 to vibrate through the first vibration plate 312, so that the volume between the diaphragm 34 and the second diaphragm assembly 32 changes relatively to promote the air in the sound cavity 41 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; further, The central magnetic part 22 is a counter-magnetic structure, which can improve the magnetic field strength of the magnetic circuit system 2 of the sound-generating device 100 and improve the overall performance of the sound-generating device 100. The effective vibration area Sd1 of the diaphragm 34 is set to be smaller than the effective vibration area Sd2 of the second diaphragm assembly 32, so that the ratio of Sd1 to Sd2 is 1:1.5~1:3. In this way, when the voice coil 33 drives the diaphragm 34 and the second diaphragm assembly 32 to vibrate through the first vibration plate 312, the diaphragm 34 vibrates and deforms, so that the diaphragm 34 has a counter effect on the volume of the pushed air, and the second diaphragm assembly 32 has a positive effect on the volume of the pushed air. The volume change of the sound-generating cavity 41 is used to increase the volume of the pushed air during operation, thereby further increasing the effective vibration area of ​​the product.

[0091] 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 .

[0092] In this embodiment, if Figures 2 to 4 , Figure 8 , Fig. 9 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.

[0093] 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.

[0094] Optionally, the second bending portion 3121 may be an annular structure formed by integral bending, so that the end surface of the voice coil 33 adjacent to one end of the first vibration plate 312 is connected to the second bending portion 3121. Alternatively, the second bending portion 3121 includes a plurality of second bending portions 3121, the plurality of second bending portions 3121 are arranged at intervals, and the corresponding voice coil 33 is arranged in an annular structure, so that the plurality of second bending portions 3121 are connected to the end surface of the voice coil 33 adjacent to one end of the first vibration plate 312, which is not limited here.

[0095] In another embodiment, the first diaphragm assembly 31 further includes a first bracket, and the two ends of the first bracket are respectively connected to the first vibration plate 312 and the voice coil 33. It can be understood that the first 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 first bracket, so that the voice coil 33 is suspended at a more reasonable position in the magnetic gap 24 by using the first bracket, so as to ensure the effect of the magnetic circuit system 2 driving the voice coil 33 to vibrate.

[0096] Optionally, the first bracket forms an annular structure, so that the end surface of the voice coil 33 adjacent to the first vibration plate 312 is connected to the first bracket. Alternatively, the first bracket includes multiple first brackets, the multiple first brackets are arranged at intervals, and the corresponding voice coil 33 is arranged in an annular structure, so that the multiple first brackets are connected to the end surface of the voice coil 33 adjacent to the first vibration plate 312, which is not limited here.

[0097] In one embodiment, the first vibration plate 312 is provided with a protrusion 3122 approaching the diaphragm 34 , and the inner edge of the diaphragm 34 and the inner edge of the second vibration plate 322 are both connected to the protrusion 3122 .

[0098] In this embodiment, if Figures 2 to 4 , Figure 8 , Fig. 9 As shown, by providing a protrusion 3122 on the first vibration plate 312, the protrusion 3122 extends toward the diaphragm 34, so that the first vibration plate 312 is connected to the inner edge of the diaphragm 34 and the inner edge of the second diaphragm assembly 32 through the protrusion 3122, so that the diaphragm 34 and the second diaphragm assembly 32 are supported away from the first diaphragm assembly 31 by the protrusion 3122, and the interference of the diaphragm 34 and the second diaphragm assembly 32 with the first diaphragm assembly 31 is effectively avoided to ensure the vibration effect.

[0099] It can be understood that the protrusion 3122 is formed by bending and extending the inner side of the first vibration plate 312 toward the direction close to the diaphragm 34. Optionally, the first vibration plate 312 and the protrusion 3122 are an integrally formed structure, such as integral injection molding or integral stamping molding, which is not limited here. Figure 2 , Figure 8 and Fig. 9 As shown, the first vibration plate 312 is recessed on the side facing away from the diaphragm 34 and toward the side close to the diaphragm 34 , so that the side of the first vibration plate 312 facing the diaphragm 34 is raised to form a protrusion 3122 , which is not limited here.

[0100] Optionally, the raised portion 3122 may be an integrated annular structure; or, the raised portion 3122 includes a plurality of raised portions 3122, which are spaced apart and form an annular structure, which is not limited here.

[0101] In another embodiment, the first diaphragm assembly 31 further includes a second bracket, one end of which is connected to the first vibration plate 312 , and the other end of which is connected to the inner edge of the diaphragm 34 and the inner edge of the second vibration plate 322 .

[0102] It can be understood that the second 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 inner edge of the diaphragm 34 and the inner edge of the second diaphragm assembly 32 through the second bracket, thereby utilizing the second bracket to support the diaphragm 34 and the second diaphragm assembly 32 away from the first diaphragm assembly 31, thereby effectively avoiding interference of the diaphragm 34 and the second diaphragm assembly 32 with the first diaphragm assembly 31, thereby ensuring the vibration effect.

[0103] Optionally, the second bracket forms an annular structure; or, the second bracket includes multiple second brackets, and the multiple second brackets are arranged at intervals to form an annular structure, which is not limited here.

[0104] In one embodiment, a first rear cavity 42 is enclosed between the first diaphragm assembly 31 and the diaphragm 34, and a second rear cavity 43 is enclosed between the first diaphragm assembly 31, the second diaphragm assembly 32, the outer shell 1 and the magnetic circuit system 2; the first vibration plate 312 is provided with a protrusion 3122 approaching the diaphragm 34, and the inner edge of the diaphragm 34 and the inner edge of the second vibration plate 322 are both connected to the protrusion 3122; wherein, the protrusion 3122 is provided with an air flow channel 3123 connecting the first rear cavity 42 and the second rear cavity 43.

[0105] In this embodiment, if Figure 3 and Figure 4 As shown, the outer side of the outer folding ring 313 of the first diaphragm assembly 31 is connected to the outer shell 1, the inner side of the inner folding ring 311 of the first diaphragm assembly 31 is connected to the central magnetic part 22 of the magnetic circuit system 2, the outer side of the diaphragm 34 is connected to the outer shell 1, and the inner edge of the diaphragm 34 is connected to the first vibration plate 312, so that a first rear cavity 42 is enclosed between the outer folding ring 313 of the first diaphragm assembly 31, the first vibration plate 312, the diaphragm 34 and the outer shell 1, the outer side of the second diaphragm assembly 32 is connected to the outer shell 1, and the inner edge of the second diaphragm assembly 32 is connected to the first vibration plate 312, so that a sound cavity 41 is enclosed between the diaphragm 34, the first vibration plate 312, the second diaphragm assembly 32 and the outer shell 1, and a second rear cavity 43 is enclosed between the second diaphragm assembly 32, the first vibration plate 312 of the first diaphragm assembly 31, the inner folding ring 311, the outer shell 1 and the magnetic yoke 21 of the magnetic circuit system 2.

[0106] It can be understood that when the voice coil 33 drives the first diaphragm assembly 31, the diaphragm 34 and the second diaphragm assembly 32 to vibrate, in order to avoid the imbalance of air pressure in the sound cavity 41, the first rear cavity 42 and the second rear cavity 43, the sound cavity 41 is connected with the outside through the sound outlet hole 111, the first rear cavity 42 is connected with the second rear cavity 43, and the second rear cavity 43 is connected with the outside through the air leakage holes on the outer shell 1 and / or the magnetic yoke 21 of the sound-emitting device 100.

[0107] In this embodiment, if Figures 2 to 4 , Figure 8 and Fig. 9As shown, by providing a protrusion 3122 close to the diaphragm 34 on the first vibration plate 312, the inner edge of the diaphragm 34 and the inner edge of the second diaphragm assembly 32 are connected to the protrusion 3122, and an air flow channel 3123 connecting the first rear cavity 42 and the second rear cavity 43 is provided on the protrusion 3122. In this way, the protrusion 3122 can be used to connect and fix the diaphragm 34 and the second diaphragm assembly 32, and the air flow channel 3123 of the protrusion 3122 can be used to connect the first rear cavity 42 with the second rear cavity 43, so as to ensure air pressure balance and ensure the sound effect.

[0108] Optionally, the air flow channel 3123 includes a plurality of air flow channels 3123, which are spaced apart along the raised portion 3122. Such a configuration can ensure that the first rear cavity 42 is connected to the second rear cavity 43, thereby avoiding an imbalance in the air pressure in the first rear cavity 42, which may affect the vibration effect of the diaphragm 34 and the first diaphragm assembly 31.

[0109] Of course, in other embodiments, the first diaphragm assembly 31 also includes a second bracket, one end of the second bracket is connected to the first vibration plate 312, and the other end of the second bracket is connected to the inner edge of the diaphragm 34 and the inner edge of the second diaphragm assembly 32. At this time, the second bracket is provided with an air flow channel 3123 connecting the first rear cavity 42 and the second rear cavity 43, which is not limited here.

[0110] It can be understood that the air flow channel 3123 can be a through hole, notch or other structure arranged on the raised portion 3122 or the second bracket, or it can be a convex bulge formed by the first vibration plate 312 or the raised portion 3122 or the second bracket protruding toward the side away from the diaphragm 34, so that the inner edge of the diaphragm 34 and the inner edge of the second diaphragm assembly 32 cooperate with the convex bulge to form a through hole or channel structure, which is not limited here.

[0111] In order to further improve the circulation of air pressure in the first rear cavity 42 and the second rear cavity 43, in one embodiment, the first vibration plate 312 is bent and extended toward the voice coil 33 to form a second bending portion 3121, the second bending portion 3121 is connected to the voice coil 33, and the second bending portion 3121 is provided with a notch 3124. Figure 2 , Figure 8 and Fig. 9 As shown, by providing a notch 3124 in the second bending portion 3121 , airflows on both sides of the second bending portion 3121 can flow through the notch 3124 , thereby increasing the airflow velocity.

[0112] Of course, in other embodiments, the first diaphragm assembly 31 also includes a first bracket, and the two ends of the first bracket are respectively connected to the first vibration plate 312 and the voice coil 33. At this time, the first bracket is provided with a notch 3124, so that the air pressure on both sides of the first bracket can flow through the notch 3124, thereby increasing the air flow speed.

[0113] Optionally, the notch 3124 may be a through hole, a notch or other structure provided on the second bending portion 3121 or the first bracket, or may be a convex bulge formed by the second bending portion 3121 or the first bracket protruding toward the side away from the voice coil 33, so that a through hole or a channel structure is formed by the voice coil 33 and the convex bulge, which is not limited here.

[0114] 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, 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 bending and extending the main body portion 3221 toward the first vibration plate 312, and the first bending portion 3222 is connected to the inner edge of the first vibration plate 312 and / or the diaphragm 34.

[0115] In this embodiment, the folding ring portion 321 of the second diaphragm assembly 32 can be a convex structure protruding upward or a concave structure concave downward, that is, the folding ring portion 321 has a deformation section protruding upward or concave downward, which is not limited here. In order to facilitate the connection between the folding ring portion 321 and the housing 1, the outer periphery of the folding ring portion 321 is bent to form a first flange, and the first flange is connected to the outer wall of the housing 1.

[0116] It can be understood that the first flange is formed by extending the outer peripheral edge of the deformation section of the folding ring portion 321 along the vibration direction of the vibration system, and the first flange 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 can be improved. Of course, the outer side of the deformation section of the folding ring portion 321 has a horizontal portion extending 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, which is not limited here.

[0117] In one embodiment, the second vibration plate 322 includes a main body portion 3221, an inclined portion 3223 and a first bent portion 3222 which are connected in sequence, the main body portion 3221 is connected to the inner edge of the folding ring portion 321, the first bent portion 3222 is connected to the inner edge of the first vibration plate 312 and / or the diaphragm 34, and the inclined portion 3223 is set at an angle to the vibration direction of the vibration system 3.

[0118] In this embodiment, by setting the second vibration plate 322 as the main body 3221 and the 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, that is, the inner edge of the deformation section of the folding ring portion 321 is connected to the main body 3221, and the first bending portion 3222 is connected to the inner edge of the first vibration plate 312 and / or the diaphragm 34, 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 41. 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 first vibration plate 312. In this way, when the voice coil 33 drives the diaphragm 34 and the second diaphragm assembly 32 to vibrate through the first vibration plate 312, the second vibration plate 322 of the second diaphragm assembly 32 drives the folding ring portion 321 to vibrate and deform.

[0119] 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 first vibration plate 312, for example, by injection molding or stamping molding, which is not limited here.

[0120] 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 .

[0121] Understandable, such as Figures 2 to 4 , Fig.10 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.

[0122] 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, and the inner edge of the internal connection portion 343 is connected to the first vibration plate 312 and / or the first bending portion 3222, and the deformation portion 342 is bent.

[0123] In this embodiment, if Figures 2 to 5 , Fig.11 and Fig.12 As shown, by setting the diaphragm 34 as a flexible part, when the voice coil 33 drives the diaphragm 34 and the second diaphragm assembly 32 to vibrate through the first vibration plate 312, the diaphragm 34 vibrates and deforms, so that the volume between the diaphragm 34 and the second diaphragm assembly 32 changes relatively to promote the air in the sound cavity 41 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.

[0124] 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 vibration plate 312 and / or 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 first vibration plate 312 through the internal connection part 343, so that a sealed sound cavity 41 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 diaphragm 34 and the second diaphragm assembly 32 to vibrate through the first vibration plate 312, the diaphragm 34 vibrates and deforms, and at the same time, the second vibration plate 322 of the second diaphragm assembly 32 drives the folding ring part 321 to vibrate and deform.

[0125] In one embodiment, the inner edge of the inner connection portion 343 extends along the inner surface of the first vibration plate 312 to form a second flange 3431, and the first bent portion 3222 is adjacent to one end of the first vibration plate 312 to form a straight section 3225 extending along the inner surface of the first vibration plate 312; wherein the second flange 3431 is clamped between the first vibration plate 312 and the straight section 3225; or, the straight section 3225 is clamped between the second flange 3431 and the first vibration plate 312; or, the second flange 3431 and the straight section 3225 are both connected to the first vibration plate 312.

[0126] In this embodiment, if Figures 2 to 4 , Fig.12As shown, by setting the second flange 3431 on the inner edge of the inner connection part 343, the second flange 3431 extends along the inner surface of the first vibration plate 312, so that the second flange 3431 is used to connect with the first vibration plate 312 to increase the contact area, not only to improve the connection stability, but also to further improve the waterproof sealing performance. It can be understood that by bending the first bending part 3222 at one end adjacent to the first vibration plate 312 to form a straight section 3225, the straight section 3225 extends along the inner surface of the first vibration plate 312, so that the straight section 3225 is used to connect with the first vibration plate 312 to increase the contact area, not only to improve the connection stability, but also to further improve the waterproof sealing performance.

[0127] Optionally, the second flange 3431 of the diaphragm 34 and the straight section 3225 of the second vibration plate 322 are both connected to the first vibration plate 312. It can be understood that the second flange 3431 and the straight section 3225 are both connected to the first vibration plate 312, and the second flange 3431 and the straight section 3225 can be arranged at intervals on the inner surface of the first vibration plate 312 or arranged adjacent to the inner surface of the first vibration plate 312, which is not limited here.

[0128] In order to reduce the area of ​​the first vibration plate 312 occupied by the diaphragm 34 and the second vibration plate 322 when connected to the first vibration plate 312, and ensure the connection stability at the same time. The second flange 3431 of the diaphragm 34 is sandwiched between the straight sections 3225 of the first vibration plate 312 and the second vibration plate 322, that is, the first vibration plate 312, the second flange 3431, and the straight section 3225 are stacked in sequence along the vibration direction of the vibration system; or, the straight section 3225 of the second vibration plate 322 is sandwiched between the second flange 3431 of the diaphragm 34 and the first vibration plate 312, that is, the first vibration plate 312, the straight section 3225, and the second flange 3431 are stacked in sequence along the vibration direction of the vibration system, which is not limited here.

[0129] 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.

[0130] In this embodiment, the compliance of the diaphragm 34 may be greater than or equal to the compliance of the folding ring 321. It can be understood that when the voice coil 33 drives the diaphragm 34 and the second diaphragm assembly 32 to vibrate through the first vibration plate 312, 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.

[0131] It can be understood that the compliance of the diaphragm 34 is optionally greater than or equal to the compliance of the inner fold 311 of the first diaphragm assembly 31, and the compliance of the diaphragm 34 is optionally greater than or equal to 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 will 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.

[0132] Optionally, the deformation portion 342 protrudes in a direction away from the first diaphragm assembly 31, and the deformation section of the folding ring portion 321 protrudes in a direction close to the first diaphragm assembly 31, and the deformation portion 342 and the deformation section of 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 deformation section of 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 deformation section of the folding ring portion 321 may also protrude in a direction away from the first diaphragm assembly 31, which is not limited here.

[0133] 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 deformation section of the folding ring portion 321, and the ratio of L1 to L2 is 1:1 to 3:1.

[0134] In this embodiment, if Figure 3 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 deformation segment 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 41 is used to increase the pushed air volume during operation, thereby increasing the effective vibration area of ​​the product.

[0135] 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.

[0136] In one embodiment, 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 outer side of the central magnetic portion 22 and forms a magnetic gap 24 with the central magnetic portion 22. The inner side of the inner fold ring 311 is connected to the central magnetic portion 22. The side magnetic portion 23 includes a plurality of side magnetic portions, and an avoidance space 233 is formed between two adjacent side magnetic portions 23.

[0137] In this embodiment, if Figure 2 , Figure 5 and Figure 6 As shown, the side magnetic part 23 of the magnetic circuit system 2 is arranged around the outside of the central magnetic part 22, and the side magnetic part 23 and the central magnetic part 22 are spaced to form a magnetic gap 24. Optionally, the side magnetic part 23 includes a plurality of side magnetic parts 23, and the plurality of side magnetic parts 23 are spaced and arranged around the outside of the central magnetic part 22, so that two adjacent side magnetic parts 23 are spaced to form an escape space 233. Of course, in other embodiments, the side magnetic part 23 can also be set as an integrated annular structure, which is not limited here.

[0138] In one embodiment, the second vibration plate 322 has a first extension portion 3224 extending to the escape space 233 , and 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 .

[0139] In this embodiment, if Figure 2 , Figure 5 , Fig.11 , Fig.13 As shown, by providing a plurality of edge magnetic parts 23, the plurality of edge magnetic parts 23 surround and are arranged at intervals on the outside of the central magnetic part 22, so that an escape space 233 is formed between two adjacent edge magnetic parts 23, and by providing a first extension part 3224 on the second diaphragm assembly 32, so that the first extension part 3224 extends toward the escape space 233 and is connected to the first vibration plate 312, so that the connection stability between the second diaphragm assembly 32 and the first vibration plate 312 can be increased, so as to ensure that the voice coil 33 drives the second diaphragm assembly 32 to vibrate through the first vibration plate 312. Optionally, the first extension part 3224 is formed by the second vibration plate 322 extending toward the escape space 233.

[0140] In this embodiment, if Figure 5 , Fig.13 As shown, the diaphragm 34 has a second extension portion 344 extending to the avoidance space 233. The second extension portion 344 corresponds to the first extension portion 3224, thereby further increasing the volume of the sound cavity 41 formed between the diaphragm 34 and the second vibration plate 322, thereby improving the vibration effect; at the same time, the connection stability and sealing of the diaphragm 34 and the second vibration plate 322 and / or the first vibration plate 312 are increased.

[0141] It can be understood that the inner connection portion 343 and the second flange 3431 of the diaphragm 34 both extend toward the escape space 233 and form a second extension portion 344, which is not limited here. The main body 3221, the first bent portion 3222 and the straight section 3225 of the second vibration plate 322 all extend toward the escape space 233 and form a first extension portion 3224, which is not limited here.

[0142] In this embodiment, the central magnetic portion 22 can be selected as a rectangular structure, the avoidance space 233 of the side magnetic portion 23 is set corresponding to the corner position of the central magnetic portion 22, the second vibration plate 322 is provided with a first extension portion 3224 corresponding to each avoidance space 233, and the diaphragm 34 is provided with a second extension portion 344 corresponding to each avoidance space 233, which is not limited here.

[0143] In another embodiment, the voice coil 33 has a first protrusion 331 extending to the escape space 233 , and the central magnetic portion 22 has a second protrusion 224 extending to the escape space 233 . The first protrusion 331 and the second protrusion 224 are disposed opposite to each other.

[0144] In this embodiment, if Figure 6 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. By providing a first protrusion 331 on the voice coil 33, 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 configuration increases the length of the wire of the voice coil 33 on the one hand, thereby facilitating the connection between the centering support plate 35 and the voice coil 33, and increases the magnet volume of the central magnetic portion 22 on the other hand, thereby effectively improving the magnetic field strength, and further improving the BL value of the sound-generating device 100.

[0145] 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.

[0146] In this embodiment, the avoidance space 233 of the side magnetic portion 23 has two opposite first sides, the first protrusion 331 of the voice coil 33 has two second sides respectively opposite to the two first sides, and the two second sides are opposite to and spaced from the two first sides, and the second protrusion 224 of the center magnetic portion 22 has two third sides respectively opposite to the two second sides, and the two third sides are opposite to and spaced from the two second sides, that is, each second side is located between a first side and a third side.

[0147] In one embodiment, the vibration system 3 also includes a centering support plate 35, which includes an external fixing portion 351, an internal fixing portion 352, and a vibration arm 353 connecting the external fixing portion 351 and the internal fixing portion 352. The external fixing portion 351 is connected to the outer shell 1, and the internal fixing portion 352 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.

[0148] In this embodiment, if Figure 2 , Figure 6 , Fig.14 As shown, by connecting the outer fixing portion 351 of the centering support 35 to the housing 1, and connecting the inner fixing portion 352 to the voice coil 33, and electrically connecting to the lead of the voice coil 33, on the one hand, the voice coil 33 is connected to the external circuit through the centering support 35, and on the other hand, the centering support 35 has a centering effect on the vibration of the voice coil 33, thereby preventing the voice coil 33 from swinging or polarizing during the vibration process.

[0149] In order to prevent the setting of the centering support 35 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 35. When there are multiple centering support 35, the multiple centering support 35 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.

[0150] It can be understood that the plurality of centering supports 35 can be symmetrically distributed along the long axis direction of the magnetic circuit system 2; the plurality of centering supports 35 can also be symmetrically distributed along the short axis direction of the magnetic circuit system 2; the plurality of centering supports 35 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 35 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.

[0151] Optionally, the centering support plates 35 include two or four. Such an arrangement can not only utilize the centering support plates 35 to connect the voice coil 33 to the external circuit, but also ensure the vibration balance of the sound-generating device 100 .

[0152] In one embodiment, the centering support 35 includes an outer fixing portion 351 , an inner fixing portion 352 and a vibration arm 353 connecting the outer fixing portion 351 and the inner fixing portion 352 . The outer fixing portion 351 is connected to the housing 1 , and the inner fixing portion 352 is connected to the second vibration plate 322 and the voice coil 33 .

[0153] In this embodiment, if Figures 2 to 4 , Fig.14As shown, the inner fixing portion 352 is connected to the second vibration plate 322 and the voice coil 33 of the second diaphragm assembly 32, and is electrically connected to the lead of the voice coil 33. Optionally, the inner fixing portion 352 is provided with an inner solder pad 3523, and the lead of the voice coil 33 is connected and conducted with the inner solder pad 3523. In this way, the lead routing connection of the voice coil 33 can be easily realized, and the connection and conduction with the external circuit can be smoothly realized. It can be understood that the main body 3221 of the second vibration plate 322 is connected to the inner fixing portion 352 of the centering support plate 35. Optionally, the inner fixing portion 352 is connected to the side of the main body 3221 facing away from the folding ring portion 321.

[0154] Alternatively, if Figure 2 , Fig.14 As shown, the outer fixing portion 351, the vibration arm 353 and the inner fixing portion 352 of the centering support 35 can be an integrally formed structure. This can effectively ensure the structural strength of the centering support 35 and simplify the processing steps of the centering support 35. In order to ensure the deformation ability of the centering support 35, the vibration arm 353 can be optionally provided with at least one bend.

[0155] In one embodiment, if Figure 2 , Fig.14 As shown, the outer fixing portion 351 is arranged in a ring shape, and the outer fixing portion 351 has short axis sides and long axis sides that are alternately connected. The vibration arm 353 is led out from one side of the inner fixing portion 352 corresponding to the short axis side and extends along the long axis side after being bent. The vibration arm 353 is connected to the central area of ​​the long axis side.

[0156] In this embodiment, if Figure 2 , Fig.14 As shown, there is one centering support 35, in which case the outer fixing portion 351 of the centering support 35 may be a rectangular ring structure, the vibration arms 353 include at least two, and the inner fixing portions 352 may be four. It can be understood that such a configuration can increase the length of the vibration arm 353, increase the stress of the vibration arm 353, and thus improve reliability.

[0157] Optionally, the vibration arms 353 include four, and the internal fixed parts 352 include four. Each internal fixed part 352 is connected to the external fixed part 351 through a vibration arm 353. Optionally, the four vibration arms 353 and the four internal fixed parts 352 are respectively arranged corresponding to the four corners of the rectangular ring external fixed part 351. In the present embodiment, the four internal fixed parts 352 are respectively arranged corresponding to the avoidance spaces 233 of the side magnetic part 23, and at least part of the internal fixed parts 352 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.

[0158] Understandable, such as Figure 2 , Fig.14As shown, the outer fixing portion 351, the vibration arm 353 and the inner fixing portion 352 of the centering support 35 can be located in the same plane. Of course, in other embodiments, the outer fixing portion 351 and the inner fixing portion 352 of the centering support 35 can also be located in different planes, which is not limited here.

[0159] In this embodiment, if Figures 2 to 4 , Fig.14 As shown, the voice coil 33 may be optionally in the shape of a rectangular ring, and the four inner fixing portions 352 of the centering support plate 35 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 351 of the centering support plate 35 is bonded to the housing 1, and the inner fixing portion 352 and the second vibration plate 322 and the voice coil 33 may be bonded or welded, 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 353 of the centering support plate 35, so that the reliability is better when working with large amplitudes; at the same time, the centering support plate 35 provides constraints on the vibration system 3, which can better suppress the poor performance caused by product polarization under large amplitudes.

[0160] In order to better connect with the external circuit, in one embodiment, as Figure 1 , Figure 2 , Figure 4 , Figure 6 , Fig.14 As shown, the centering support 35 further includes a conductive portion 354, one end of which is connected to the external fixing portion 351, and the other end of which extends in a direction away from the housing 1 and is provided with an external soldering pad. In this way, the external soldering pad can be guided to the outside of the housing 1 through the conductive portion 354, thereby facilitating the connection and conduction between the external circuit and the centering support 35, and ensuring that current flows into the voice coil 33.

[0161] In one embodiment, the magnetic yoke 21 is provided with a avoidance structure 211 corresponding to the inner fixing portion 352. It can be understood that Figure 2 , Figure 7 As shown, by providing a avoidance structure 211 on the magnetic yoke 21 , the avoidance structure 211 can be used to provide avoidance for the centering support 35 during the vibration of the second diaphragm assembly 32 , ensuring that the inner fixing portion 352 of the centering support 35 will not touch the magnetic yoke 21 .

[0162] 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 a side of the magnetic yoke 21 facing the centering support plate 35 being recessed in a direction away from the centering support plate 35. 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.

[0163] In one embodiment, the internal fixed portion 352 includes a main body portion 3521 and a third extension portion 3522 extending from the main body portion 3521 toward the voice coil 33, the main body portion 3521 is connected to the second vibration plate 322, the third extension portion 3522 is connected to the voice coil 33, and the third extension portion 3522 or the main body portion 3521 is provided with an internal solder pad 3523 electrically connected to the lead of the voice coil 33.

[0164] In this embodiment, if Figure 2 , Fig.14 As shown, by setting the inner fixing portion 352 of the centering support plate 35 as the main body portion 3521 and the third extension portion 3522, the third extension portion 3522 extends toward the voice coil 33. In this way, while the main body portion 3521 of the inner fixing portion 352 is connected to the second vibration plate 322 of the second diaphragm assembly 32, the inner fixing portion 352 of the centering support plate 35 is connected to the voice coil 33 through the third extension portion 3522, thereby further ensuring that the voice coil 33 drives the second diaphragm assembly 32 to vibrate during the vibration process.

[0165] It can be understood that by providing an inner solder pad 3523 on the third extension portion 3522 or the main body portion 3521 , the inner solder pad 3523 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 35 .

[0166] In one 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, and the first protrusion 331 is connected to the internal fixing portion 352. The center magnetic portion 22 has a second protrusion 224 extending to the escape space 233, and the first protrusion 331 and the second protrusion 224 are arranged opposite to each other.

[0167] In this embodiment, if Figure 6 As shown, by providing a first protrusion 331 on the voice coil 33, the first protrusion 331 extends to the avoidance space 233, and providing a second protrusion 224 on the central magnetic portion 22, the second protrusion 224 extends to the avoidance space 233, and is spaced apart from and corresponds to the first protrusion 331. Such a configuration increases the length of the wire of the voice coil 33 on the one hand, thereby facilitating the connection between the centering support plate 35 and the voice coil 33, and increases the volume of the magnet 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.

[0168] It can be understood that by connecting the inner fixing portion 352 of the centering support plate 35 with the first protrusion 331 of the voice coil 33, on the one hand, the voice coil 33 is connected to the external circuit through the centering support plate 35, and on the other hand, the centering support plate 35 has a centering effect on the vibration of the voice coil 33, thereby preventing the voice coil 33 from swinging or polarizing during the vibration process.

[0169] 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 circuit system 2 is connected to the second shell 12, and the outer periphery of the folding ring portion 321 is clamped between the first shell 11 and the second shell 12.

[0170] In this embodiment, if Figures 1 to 4 As 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.

[0171] 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 of the magnetic circuit system 2 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.

[0172] In one embodiment, if Figures 2 to 4 , Figure 6 , Fig.14 As shown, the vibration system 3 also includes a centering support plate 35, which includes an external fixing portion 351, an internal fixing portion 352 and a vibration arm 353 connecting the external fixing portion 351 and the internal fixing portion 352, the external fixing portion 351 is clamped between the second shell 12 and the outer periphery of the second diaphragm assembly 32, the internal fixing portion 352 is connected to the voice coil 33, and is electrically connected to the lead of the voice coil 33.

[0173] 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.

[0174] Optionally, the second shell 12 of the housing 1 and the magnetic yoke 21 of the magnetic circuit system 2 are integrally formed. It is understandable that when the second shell 12 is a plastic shell, the second shell 12 and the magnetic yoke 21 are integrally injection molded. Alternatively, 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.

[0175] In one embodiment, the first shell 11 may be a metal shell, and the second shell 12 may be a metal shell.

[0176] In order to further improve the connection stability between the first housing 11 and the second housing 12 or the magnetic circuit system 2, in one embodiment, as shown in FIG. Figure 1 , Figure 2 As shown, the first housing 11 is provided with a welding portion 121 extending toward the magnetic circuit system 2, and the welding portion 121 is welded to the magnetic circuit system 2 or the second housing 12, that is, 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 1 , Figure 2 As shown, the magnetic circuit system 2 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, that is, 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.

[0177] 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 circuit system 2 or the second housing 12, and the other end of which is welded to the outer wall of the first housing 11, that is, one end of the metal welding sheet is welded to the magnetic yoke 21 or the second housing 12, and the other end of the metal welding sheet is welded to the outer wall of the first housing 11. It can be understood that the connection stability between the first housing 11 and the second housing 12 or the magnetic yoke 21 can be further improved by the metal welding sheet.

[0178] 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 folding ring portion 321 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 111 is provided in the side wall 112 or the inner bending portion 113.

[0179] In this embodiment, if Figures 2 to 4As 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 35, that is, the outer periphery of the folding ring portion 321 of the second diaphragm assembly 32 and the outer fixing portion 351 of the centering support piece 35 are clamped between one end of the side wall 112 away from the inner bending portion 113 and the second shell 12.

[0180] It can be understood that the outer fixing portion 351 of the centering support 35 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. Optionally, the outer fixing portion 351 of the centering support 35 is sandwiched between the second housing 12 and the outer periphery of the folding ring portion 321, and the inner fixing portion 352 is connected to the voice coil 33 and electrically connected to the lead wire of the voice coil 33.

[0181] In this embodiment, the inner bending portion 113 of the first shell 11 is formed by bending and extending one end of the side wall 112 away from the second shell 12 toward the inside, that is, the inner bending portion 113 and the side wall 112 of the first shell 11 are an integrally formed structure, which can ensure the structural strength of the first shell 11, which is not limited here.

[0182] 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.

[0183] 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 effective vibration area of ​​the product can be increased by utilizing the product outer dimensions. 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 41 between the diaphragm 34 and the second diaphragm assembly 32 can adapt to the needs of different products.

[0184] Optionally, the sound outlet 111 is disposed on the side wall 112 or the inner bending portion 113 , which is not limited here.

[0185] In one embodiment, if Figure 3 and Figure 4As 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 .

[0186] In this embodiment, if Figure 3 and Figure 4 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.

[0187] 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.

[0188] 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.

[0189] 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 .

[0190] In this embodiment, if Figures 2 to 4 , Figure 7As 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.

[0191] Optionally, the first central magnet 221 is an integral plate-shaped structure. Figures 2 to 4 , Figure 7 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.

[0192] 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.

[0193] 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.

[0194] Optionally, the second central magnet 223 is an integral plate-shaped structure. Figures 2 to 4 , Figure 7 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.

[0195] 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.

[0196] 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, Figures 2 to 4 , Figure 7 As shown, the edge of the second central magnet 223 is provided with an avoidance structure.

[0197] 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.

[0198] Optionally, the avoidance structure may be at least one of an inclined surface, a rounded corner, a chamfer, and a step structure.

[0199] 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.

[0200] 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, 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.

[0201] Understandable, such as Figures 2 to 4 , Figure 7 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.

[0202] 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 first vibration plate 312 and the inner fixed part 352 of the centering support plate. Optionally, there are multiple edge magnets 231 and edge magnetic conductive plates 232, and they are arranged one by one.

[0203] like Fig.15 and Fig.16 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.

[0204] 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 41 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 41 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] 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 35 of the sound device 100, and the other end of the flexible circuit board is used to connect to an external power supply.

[0210] 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 of the centering support plate 35 of the sound device 100, and the outer pad of the flexible circuit board is used to connect to the external terminal.

[0211] 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.

[0212] 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.

[0213] 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.

[0214] 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.

[0215] 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.

[0216] 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, and the magnetic circuit system is provided with a magnetic gap; and A vibration system, the vibration system comprising a first diaphragm assembly, a second diaphragm assembly, a voice coil and a diaphragm, 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 magnetic circuit system, the outer periphery of the outer folding ring being connected to the housing, one end of the voice coil being connected to the first vibration plate, 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 a side of the first diaphragm assembly facing the voice coil and being located on the outer side of the voice coil, the second diaphragm assembly comprising a folding ring portion and a second vibration plate connected thereto, the outer edges of the diaphragm and the folding ring portion being both connected to the housing, the inner edge of the diaphragm and the inner edge of the second vibration plate being both connected to the first vibration plate, so as to form a sound-emitting cavity connected to the sound outlet hole between the diaphragm and the second diaphragm assembly; 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.

2. The sound-generating device according to claim 1, characterized in that: The second vibration plate includes a main body, an inclined portion and a first bent portion which are connected in sequence, the main body is connected to the inner edge of the folding ring portion, the first bent portion is connected to the inner edge of the first vibration plate and / or the diaphragm, and the inclined portion is arranged at an angle to the vibration direction of the vibration system.

3. The sound-generating device according to claim 2, characterized in that: The diaphragm is a flexible part, and includes an external connection part, a deformation part and an internal connection part which are connected in sequence. The outer periphery of the external connection part is connected to the outer shell, the inner edge of the internal connection part is connected to the first vibration plate and / or the first bending part, and the deformation part is bent.

4. The sound-generating device according to claim 3, characterized in that: The inner edge of the inner connecting portion extends along the inner surface of the first vibration plate to form a second flange, and the first bending portion is adjacent to one end of the first vibration plate to form a straight section extending along the inner surface of the first vibration plate; Wherein, the second flange is sandwiched between the first vibration plate and the straight section; or, the straight section is sandwiched between the second flange and the first vibration plate; or, the second flange and the straight section are both connected to the first vibration plate.

5. The sound generating device according to claim 3, characterized in that: 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 deformation section 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 deformation segment of the folding ring portion protrudes in a direction close to the first diaphragm assembly, and the deformation portion and the deformation segment of 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 or equal to the compliance of the folding ring portion.

6. The sound generating device according to claim 1, characterized in that: The magnetic circuit system includes a magnetic yoke and a central magnetic part and a side magnetic part arranged on the magnetic yoke, wherein the side magnetic part is located outside the central magnetic part and forms the magnetic gap with the central magnetic part, the inner side of the inner fold is connected to the central magnetic part, the side magnetic part includes a plurality of side magnetic parts, and an escape space is formed between two adjacent side magnetic parts; The second vibration plate has a first extension portion extending to the avoidance space, the diaphragm has a second extension portion extending to the avoidance space, and the second extension portion is correspondingly connected to the first extension portion; or, the voice coil has a first protrusion portion extending to the avoidance space, the central magnetic portion has a second protrusion portion extending to the avoidance space, and the first protrusion portion and the second protrusion portion are arranged opposite to each other.

7. The sound generating device according to claim 1, characterized in that: The first vibration plate is bent and extended toward the voice coil to form a second bending portion, and the second bending portion is connected to the voice coil; or, the first diaphragm assembly further includes a first bracket, and two ends of the first bracket are respectively connected to the first vibration plate and the voice coil; And / or, the first vibration plate is provided with a protrusion close to the diaphragm, and the inner edge of the diaphragm and the inner edge of the second vibration plate are both connected to the protrusion; or, the first vibration membrane assembly further includes a second bracket, one end of the second bracket is connected to the first vibration plate, and the other end of the second bracket is connected to the inner edge of the diaphragm and the inner edge of the second vibration plate; And / or, the outer periphery of the folding ring portion is bent to form a first flange, and the first flange is connected to the outer wall of the shell; And / or, the outer periphery of the outer fold ring is bent and extended to form a third flange, and the third flange is connected to the outer wall of the outer shell.

8. The sound generating device according to claim 1, characterized in that: The vibration system also includes a centering support plate, which includes 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 outer shell, the internal fixing portion includes a main body portion and a third extension portion extending from the main body portion toward the voice coil, the main body portion is connected to the second vibration plate, the third extension portion is connected to the voice coil, and the third extension portion or the main body portion is provided with an inner solder pad electrically connected to the lead of the voice coil.

9. The sound generating device according to claim 1, characterized in that: The magnetic circuit system includes a magnetic yoke and a central magnetic part and a side magnetic part arranged on the magnetic yoke, wherein the side magnetic part is located outside the central magnetic part and forms the magnetic gap with the central magnetic part, and the central magnetic part includes a first central magnet, a central magnetic plate and a second central magnet arranged in a stacked manner, wherein the first central magnet is connected to the magnetic yoke, and the inner side of the inner folding ring is connected to the second central magnet; Wherein, the first central magnet and the second central magnet are both magnetized along the vibration direction of the vibration system and in opposite directions.

10. The sound generating device according to claim 9, 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.

11. The sound generating device according to any one of claims 1 to 10, 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 circuit system is connected to the second shell, and the outer periphery of the folding ring is clamped between the first shell and the second shell.

12. 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 11, 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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