Sound production module and electronic equipment

Abstract

The invention discloses a sound production module and electronic equipment, and relates to the technical field of electroacoustic transduction, the sound production module comprises a sound production device, the sound production device comprises a first vibration assembly and a second vibration assembly which are arranged oppositely, and the sound production device is further provided with a first rear cavity and a second rear cavity which are located between the first vibration assembly and the second vibration assembly. The first rear cavity and the second rear cavity are isolated from each other, and a first front cavity and a second front cavity are formed in the opposite sides of the first vibration assembly and the second vibration assembly respectively. The first rear cavity and the second front cavity are isolated from each other, are respectively communicated with an external space, and are closed. The invention aims to improve the effect of sound superposition or sound offset so as to improve the sound effect of the sound production module.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electro-acoustic transduction, and in particular to a sound emitting module and an electronic device. BACKGROUND

[0002] Due to the bidirectional sound emitting characteristic, the double-sided loudspeaker can realize more uniform sound field distribution and vibration cancellation effect, and is widely applied in electronic devices such as mobile phones, earphones, smart phones and XR devices.

[0003] However, due to the structural difference of the sound pipe, the existing double-sided loudspeaker has poor sound superposition or sound cancellation effect. SUMMARY

[0004] The main purpose of the present application is to provide a sound emitting module, which comprises: a sound emitting device, the sound emitting device comprising a first vibration assembly and a second vibration assembly arranged away from each other, the sound emitting device further comprising a first rear cavity and a second rear cavity located between the first vibration assembly and the second vibration assembly, the first rear cavity and the second rear cavity being isolated from each other, and the first vibration assembly and the second vibration assembly respectively forming a first front cavity and a second front cavity on the side away from each other; the first rear cavity and the second front cavity are isolated from each other and respectively communicate with the external space, and the first front cavity and the second rear cavity are closed.

[0005] In an embodiment, the sound emitting module further comprises a module shell, the module shell being provided with a containing cavity and a first channel and a second channel communicating with the containing cavity, and the first vibration assembly and the second vibration assembly being arranged in the containing cavity; the first vibration assembly and the cavity wall of the containing cavity form the first front cavity, and the second vibration assembly and the cavity wall of the containing cavity form the second front cavity; the first channel communicates with the first rear cavity, and the second channel communicates with the second front cavity.

[0006] In an embodiment, the sound emitting device has a first side wall and a second side wall away from each other, the first side wall is provided with a first sound hole corresponding to the first channel, the first sound hole communicates the first rear cavity and the first channel, and the second side wall is provided with a second sound hole; wherein the sound emitting device and the cavity wall of the containing cavity form an inner cavity, and the second sound hole communicates the second rear cavity and the inner cavity.

[0007] In an embodiment, the inner cavity is located on the side of the second side wall away from the first side wall; and / or, the first channel is located on the side of the first side wall away from the second side wall.

[0008] In an embodiment, the inner cavity and the first front cavity are in communication with each other; or, the inner cavity and the first front cavity are isolated from each other.

[0009] In an embodiment, the sound generating device comprises: a vibration system, the vibration system comprising a first vibration assembly and a second vibration assembly, the first vibration assembly comprising a first diaphragm and a first voice coil connected with each other, the second vibration assembly comprising a second diaphragm and a second voice coil connected with each other; and a magnetic circuit system, the first diaphragm and the magnetic circuit system enclosing the first back cavity, the second diaphragm and the magnetic circuit system enclosing the second back cavity.

[0010] In an embodiment, the magnetic circuit system comprises a magnetic yoke, a first central magnetic part, a first side magnetic part, a second central magnetic part and a second side magnetic part, the first central magnetic part and the first side magnetic part being arranged on one side of the magnetic yoke, the first side magnetic part being located outside the first central magnetic part and spaced from the first central magnetic part to form a first magnetic gap, the second central magnetic part and the second side magnetic part being arranged on the other side of the magnetic yoke, the second side magnetic part being located outside the second central magnetic part and spaced from the second central magnetic part to form a second magnetic gap, the first vibration assembly and the second vibration assembly being arranged on two sides of the magnetic circuit system respectively, the first voice coil corresponding to the first magnetic gap, the second voice coil corresponding to the second magnetic gap.

[0011] In an embodiment, the sound generating device and the cavity wall of the accommodating cavity enclose an inner cavity, the sound generating device further comprising a first front cover arranged on the side of the first diaphragm away from the second diaphragm, a first gap being arranged between the first diaphragm and the first front cover; the first front cover being provided with a first communication hole, the first communication hole communicating the first gap and the inner cavity, so that the first diaphragm and the module shell enclose the first front cavity, and / or the sound generating device further comprising a second front cover arranged on the side of the second diaphragm away from the first diaphragm, a second gap being arranged between the second diaphragm and the second front cover; the second front cover being provided with a second communication hole, the second communication hole communicating the second gap and the second passage, so that the second diaphragm and the module shell enclose the second front cavity.

[0012] In an embodiment, the sound generating module further comprises a module shell, the module shell being provided with a first passage and an inner cavity; the first side magnetic part being provided with a first sound hole, the first sound hole communicating the first back cavity and the first passage, the second side magnetic part being provided with a second sound hole, the second sound hole communicating the second back cavity and the inner cavity; Alternatively, the magnetic circuit system includes a plurality of first side magnetic portions, the plurality of first side magnetic portions are located outside the first central magnetic portion, and two adjacent first side magnetic portions are spaced apart to form a first sound hole, the first sound hole connects the first rear cavity and the first channel; the magnetic circuit system includes a plurality of second side magnetic portions, the plurality of second side magnetic portions are located outside the second central magnetic portion, and two adjacent second side magnetic portions are spaced apart to form a second sound hole, the second sound hole connects the second rear cavity and the inner cavity; Alternatively, the sound-emitting device further comprises a first shell, the first vibration component is disposed in the first shell, the first shell is provided with a first sound hole, the first sound hole connects the first rear cavity and the first channel, and the sound-emitting device further comprises a second shell, the second vibration component is disposed in the second shell, the second shell is provided with a second sound hole, the second sound hole connects the second rear cavity and the inner cavity.

[0013] In one embodiment, the magnetic conductive yoke includes a first magnetic yoke and a second magnetic yoke stacked together, the first central magnetic portion and the first side magnetic portion are arranged on a side of the first magnetic yoke facing away from the second magnetic yoke, and the second central magnetic portion and the second side magnetic portion are arranged on a side of the second magnetic yoke facing away from the first magnetic yoke.

[0014] In one embodiment, the sound module is installed in an electronic device, the electronic device further comprising a device housing, the device housing having a receiving cavity and a first channel and a second channel communicating with the receiving cavity, the first vibration component and the second vibration component of the sound module being disposed in the receiving cavity; The first vibration component and the cavity wall of the accommodating cavity are enclosed to form a first front cavity, and the second vibration component and the cavity wall of the accommodating cavity are enclosed to form a second front cavity; The first channel is connected to the first rear cavity, and the second channel is connected to the second front cavity.

[0015] The present invention also provides an electronic device, which includes the sound module as described above.

[0016] The sound production module of the technical scheme of the present application comprises a sound production device, the sound production device comprises first and second vibration assemblies arranged away from each other, the sound production device further comprises first and second rear cavities arranged between the first and second vibration assemblies, the first and second rear cavities are isolated from each other, and the first and second vibration assemblies respectively form first and second front cavities on the sides away from each other; the first rear cavity and the second front cavity are isolated from each other and respectively communicate with the external space, the first and second rear cavities are closed, so that the first rear cavity can cooperate with the second front cavity to realize sound superposition or sound cancellation, thereby improving the sound effect of the sound production module; meanwhile, the first and second rear cavities are closed, so that the gas in the second rear cavity can be quickly discharged during sound production, thereby reducing the peak value of the front cavity air pressure; or external air is supplemented through a pressure relief channel to avoid negative pressure adsorption. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0018] Figure 1 FIG. 1 is a cross-sectional view of a sound production module according to an embodiment of the present application; Figure 2 FIG. 2 is an exploded view of the sound production module according to the embodiment of the present application; Figure 1 FIG. 3 is an enlarged view of part A in FIG. 2; Figure 3 FIG. 4 is an exploded view of the sound production module according to the embodiment of the present application.

[0019] BRIEF DESCRIPTION OF DRAWINGS 100. Sound module; 1. Module housing; 11. Upper housing; 111. First front cavity; 12. Lower housing; 121. Second front cavity; 13. Accommodating cavity; 14. First channel; 15. Second channel; 17. Inner cavity; 2. Sound device; 21. Vibration system; 211. First vibration assembly; 2111. First diaphragm; 2112. First voice coil; 212. Second vibration assembly; 2121. Second diaphragm; 2122. Second voice coil; 215. First rear cavity; 216. Second rear cavity; 217. First side wall; 2171. First sound hole; 218. Second side wall; 2181. Second sound hole Hole; 22, magnetic circuit system; 221, magnetic yoke; 2211, first magnetic yoke; 2212, second magnetic yoke; 222, first central magnetic part; 2221, first magnetic gap; 223, first side magnetic part; 224, second central magnetic part; 2241, second magnetic gap; 225, second side magnetic part; 23, first shell; 231, first front cover; 2311, first connecting hole; 232, first lower shell; 24, second shell; 241, second front cover; 2411, air passage; 2412, second connecting hole; 242, second lower shell; 25, first centering support piece; 26, second centering support piece.

[0020] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually 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.

[0024] Traditional single-cavity speakers, because the cavity volume and opening characteristics determine their resonant frequency, can usually only tune a certain frequency band (such as low frequency) through a single resonant cavity, while the sound waves in other frequency bands (such as mid- and high-frequency) cannot be effectively controlled, making it difficult to simultaneously meet the acoustic requirements of different frequency bands, resulting in a limited frequency response range and flat sound performance.

[0025] At the same time, in scenarios where sound needs to be enhanced or offset, single-cavity speakers have natural limitations, such as the need to directionally enhance sound in open-ear headphones, and the need to offset part of the sound in mobile phone speakers to improve acoustic privacy.

[0026] However, when using a double-sided speaker, since each sound-emitting surface has a front cavity and a rear cavity, when vibrating and producing sound, the sound waves generated by the front cavity and the rear cavity may propagate through different paths and interact with each other, which will inevitably cause interference, resulting in poor sound effects in the end.

[0027] Based on the above questions, please refer to Figures 1 to 3 As shown, the present invention proposes a sound module 100, which includes a module shell 1 and a sound device 2. The module shell 1 is provided with a accommodating cavity 13 and a first channel 14 and a second channel 15 connected to the accommodating cavity 13. The sound device 2 has a first vibration component 211 and a second vibration component 212 arranged in opposite directions. The sound device 2 is also provided with a first rear cavity 215 and a second rear cavity 216 located between the first vibration component 211 and the second vibration component 212. The first rear cavity 215 and the second rear cavity 216 are isolated from each other. The sound device 2 is arranged in the accommodating cavity 13, and the first vibration component 211 and the module shell 1 form a first front cavity 111, and the second vibration component 212 and the module shell 1 form a second front cavity 121; wherein, the first rear cavity 215 and the second front cavity 121 are independently connected to the external space respectively, and the first front cavity 111 and the second rear cavity 215 are closed.

[0028] In addition, the module housing 1 is further provided with an inner cavity 17 , the first rear cavity 216 is communicated with the first channel 14 , the second channel 15 is communicated with the second front cavity 121 , and the inner cavity 17 is communicated with the second rear cavity 216 .

[0029] In this embodiment, the module housing 1 of the sound module 100 is used to install, fix and support components such as the sound device 2, that is, the module housing 1 provides a mounting base for components such as the sound device 2. In order to facilitate the installation and protection of the sound device 2 and components such as the vibration assembly, the module housing 1 has a accommodating cavity 13. The accommodating cavity 13 can isolate the sound device 2 and the vibration surface of the sound device 2 from the external environment to prevent direct leakage of sound waves and provide a closed environment for the directional output or cancellation of sound waves. Optionally, the structure of the module housing 1 can be a mounting shell, box body or cabinet body with an accommodating cavity 13, and the module housing 1 can be an integral structure or a split structure.

[0030] It can be understood that the first rear cavity 215 and the second rear cavity 216 are isolated from each other, which can prevent the sound waves generated by the first vibration component 211 and the sound waves generated by the second vibration component 212 from mixing in the first rear cavity 215 and / or the second rear cavity 216, and avoid the sound waves of different frequency bands from reflecting inside the wall to generate standing waves and other interference factors, thereby improving the purity of the sound, so as to ensure that sound wave crosstalk can be prevented and the phase relationship of the sound waves transmitted from the first channel 14 and the second channel 15 is accurate.

[0031] In this embodiment, the first vibration component 211 and the second vibration component 212 are independent vibration structures arranged in opposite directions, which can be specifically implemented by combining a diaphragm with a magnetic circuit system to generate bidirectional sound waves, wherein the first rear cavity 215 and the second front cavity 121 are isolated from each other and respectively communicated with the external space, while the first front cavity 111 and the second rear cavity 216 are closed to form two independent acoustic propagation paths. The sound waves generated by the first vibration component 211 are propagated to the external space through the first rear cavity 215, and the sound waves generated by the second vibration component 212 are propagated to the external space through the first rear cavity 215. The sound waves propagate to the external space through the second front cavity 121, and the first rear cavity 215 and the second front cavity 121 are independently connected to the external space, so that the first rear cavity 215 and the second front cavity 121 are provided with independent acoustic channels, which can be specifically achieved by using sound guide holes or sound conduits provided on both sides of the module shell 1 to form independent sound wave radiation paths. The first front cavity 111 and the second rear cavity 216 are closed as two cavities without a channel connecting to the outside world. Specifically, the cavity can be sealed by the shell structure to limit the internal sound wave propagation path and form a specific acoustic impedance.

[0032] It can be understood that through the combined design of the isolated rear cavity and the independent external connection channel, the front and rear cavities of the first vibration component 211 and the second vibration component 212 form an asymmetric acoustic path, and the independent external connection of the first rear cavity 215 and the second front cavity 121 can respectively optimize the acoustic radiation efficiency of the corresponding vibration components. The closed first front cavity 111 and the second rear cavity 216 adjust the acoustic impedance by forming a closed space, thereby eliminating the phase interference problem caused by the difference in the sound propagation path, and solving the problem of poor sound superposition or sound cancellation effect caused by the difference in the sound pipe structure of the existing double-sided speakers, and realizing precise superposition or cancellation control of two-way sound waves. This configuration allows the two vibration components to work independently, and their respective sound wave propagation paths are independent, avoiding the phase difference caused by the superposition of sound waves in the free field, thereby improving the acoustic performance.

[0033] In this embodiment, the module housing 1 is provided with a housing cavity 13 to accommodate the sound-generating device 2, and the first channel 14 and the second channel 15 are both connected to the housing cavity 13. In addition, the sound-generating device 2 is a speaker structure, and it can be a double-sided sound-generating speaker, such as a double-sided dynamic speaker. The sound-generating device 2 has a first vibration component 211 and a second vibration component 212 that are arranged away from each other. The vibration directions of the first vibration component 211 and the second vibration component 212 are opposite (that is, the phase difference), forming a dipole sound source to generate a directional sound field. A first rear cavity 215 and a second rear cavity 216 isolated from each other are provided between the first vibration component 211 and the second vibration component 212. The first rear cavity 215 and the second rear cavity 216 are centrally symmetrically arranged, and the first rear cavity 215 is connected to the first channel 14, and the second front cavity 121 is connected to the second channel 15. When the first vibration component 211 and the second vibration component 212 vibrate synchronously, directional sound waves can be generated toward the first rear cavity 215 and the second front cavity 121, and the directional sound waves can be propagated outward synchronously from the first channel 14 and the second channel 15.

[0034] In this embodiment, the module shell 1 includes an upper shell 11 and a lower shell 12, and the upper shell 11 and the lower shell 12 are enclosed to form a accommodating cavity 13; the sound-emitting device 2 is limited between the upper shell 11 and the lower shell 12, the first vibration component 211 cooperates with the upper shell 11 to form a first front cavity 111, and the second vibration component 212 cooperates with the lower shell 12 to form a second front cavity 121; wherein, the upper shell 11 is provided with a first channel 14 and a second channel 15; or, the lower shell 12 is provided with a first channel 14 and a second channel 15; or, one of the upper shell 11 and the lower shell 12 is provided with a first channel 14, and the other is provided with a second channel 15.

[0035] It can be understood that the upper shell 11 and the lower shell 12 are packaging shells, the materials of the upper shell 11 and the lower shell 12 can be epoxy resin, ceramic or metal, etc., the upper shell 11 and the lower shell 12 are connected by adhesion, clamping or the like, and together enclose the accommodating cavity 13, so that the sound generating device 2 is limited in the accommodating cavity 13 and located between the upper shell 11 and the lower shell 12, wherein the side of the upper shell 11 facing the sound generating device 2 has an arc surface or a flat structure, and forms a first front cavity 111 with the first vibration assembly 211 of the sound generating device 2, and the side of the lower shell 12 facing the sound generating device 2 has an arc surface or a flat structure, and forms a second front cavity 121 with the second vibration assembly 212 of the sound generating device 2.

[0036] Wherein, the upper shell 11 and the lower shell 12 of the module shell 1 can be made of thin steel sheet, so that the module shell 1 can be designed to be thinner, thereby greatly increasing the cavity volume of the accommodating cavity 13 in the module shell 1, effectively increasing the volume of the front sound cavity and the rear sound cavity formed by the sound generating device 2 and the module shell 1, and thereby improving the acoustic performance of the sound generating module 100, especially the low frequency acoustic performance. At the same time, the sound generating device 2 is fixed in the module shell 1, so that heat dissipation can be realized by the module shell 1 made of metal material, and the heat dissipation performance of the sound generating module 100 is improved.

[0037] At the same time, the upper shell 11 can be provided with the first channel 14 and the second channel 15, or the lower shell 12 can be provided with the first channel 14 and the second channel 15, or one of the upper shell 11 and the lower shell 12 can be provided with the first channel 14, and the other of the upper shell 11 and the lower shell 12 can be provided with the second channel 15, or the upper shell 11 and the lower shell 12 can jointly enclose the first channel 14 and / or the second channel 15, which is not limited here.

[0038] Preferably, the first channel 14 and the second channel 15 are both provided in the upper shell 11 and respectively communicate with the accommodating cavity 13, so that the first channel 14 and the second channel 15 are directly formed when the upper shell 11 is injection molded, to ensure the accuracy of the relative positions of the first channel 14 and the second channel 15, avoid the position deviation of the first channel 14 and the second channel 15 about the sound generating device 2 due to the installation error of the upper shell 11 and the lower shell 12, improve the consistency of the sound wave propagation path, offset the acoustic performance difference caused by the manufacturing tolerance of the shell or the sound generating device 2, improve the product consistency, significantly improve the sound privacy, and improve the sound attenuation effect.

[0039] Of course, the first channel 14 and the second channel 15 can also be both provided in the lower shell 12, which is not described here.

[0040] In this embodiment, the first rear cavity 215 is connected to the first channel 14 so that the sound waves generated by the first vibration component 211 in the direction of the rear cavity can propagate outward from the first channel 14. At the same time, the same first vibration component 211 is also provided with a corresponding first front cavity 111. The first front cavity 111 is a chamber in which the first vibration component 211 generates and transmits sound waves in the direction away from the first rear cavity 215. The first front cavity 111 can be completely wrapped by the module shell 1 to form a closed chamber. The first front cavity 111 can also be spaced apart from the module shell 1 (that is, the cavity wall of the accommodating cavity 13) to enclose a chamber. The module shell 1 is also provided with an inner cavity 17, which can be connected to the first front cavity 111 so that the sound waves generated by the first vibration component 211 in the direction of the first front cavity 111 can enter the inner cavity 17 and be silenced in the inner cavity 17. The inner cavity 17 can also be isolated from the first front cavity 111, which is not limited here.

[0041] It can be understood that the inner cavity 17 is used to balance the air pressure inside and outside the sound module 100, so that when sound is produced, the gas in the first cavity can flow out quickly to reduce the peak air pressure in the first front cavity 111; or the external air is supplemented through the inner cavity 17 to avoid negative pressure causing adsorption of the first front cavity 111, and prevent the vibration of the sound device 2 from being affected by changes in air pressure, thereby reducing distortion.

[0042] In addition, the first rear cavity 215 is connected to the first channel 14, and there is no need to use the first front cavity 111 to produce sound, thereby reducing the cavity volume of the first front cavity 111. The first vibration component 211 faces the side of the first front cavity 111, and the distance between it and the cavity wall of the accommodating cavity 13 only retains the amplitude distance of the normal vibration of the diaphragm, thereby reducing the thickness and volume of the sound module 100, which is conducive to the miniaturization and miniaturization of the sound module 100.

[0043] Of course, in the above embodiment, the first front cavity 111 and the first channel 14 can be connected, and the first rear cavity 215 can be connected to the inner cavity 17. By ensuring that only a single cavity is retained at the first vibration component 211, the interference between the sound waves of the first front cavity 111 and the first rear cavity 215 when the first vibration component 211 makes a sound can be reduced. It will not be repeated here, and it can also reduce the interference of the sound waves of the first front cavity 111 and the first rear cavity 215, and suppress the formation of standing waves in the first front cavity 111.

[0044] In this embodiment, in order to achieve the sound superposition effect or sound cancellation effect of the sound module 100, the present application also suppresses the sound of the second rear cavity 216 by connecting the second front cavity 121 corresponding to the second vibration component 212 and the second rear cavity 216 with the inner cavity 17. Specifically, the second rear cavity 216 is connected to the inner cavity 17 so that the sound waves generated by the second vibration component 212 in the direction of the second rear cavity 216 can be eliminated from the inner cavity 17. At the same time, the same second vibration component 212 is also provided with a second front cavity 121 corresponding to the second rear cavity 216. The second front cavity 121 is a chamber for the second vibration component 212 to generate and transmit sound waves in the direction away from the second rear cavity 216. The second front cavity 121 is connected to the second channel 15, and the sound waves generated by the second front cavity 121 are propagated outward through the second channel 15 to reduce the interference of the sound waves in the second front cavity 121 and the second rear cavity 216, and suppress the formation of standing waves in the second front cavity 121.

[0045] At the same time, on the basis that the first rear cavity 215 is connected with the first channel 14, the second front cavity 121 and the second rear cavity 216 corresponding to the two sides of the second vibration component 212, the present application connects the second rear cavity 216 with the second channel 15, the second vibration component 212 generates sound waves to the second rear cavity 216 to emit sound outward, the second front cavity 121 is connected with the inner cavity 17, and the inner wall of the inner cavity 17 is provided with a sound-absorbing coating or a sound-absorbing insulation layer to absorb the sound waves generated by the second front cavity 121 to suppress the propagation of sound waves in the second front cavity 121, thereby suppressing the sound emission of the second vibration component 212 on the side facing away from the second rear cavity 216, reducing the interference of the sound waves in the second front cavity 121 and the second rear cavity 216, and suppressing the formation of standing waves in the second front cavity 121.

[0046] In addition, the second rear cavity 216 is connected to the second channel 15, and there is no need to use the second front cavity 121 to produce sound, thereby reducing the cavity volume of the second front cavity 121. The second vibration component 212 faces the side of the second front cavity 121, and the distance between it and the cavity wall of the accommodating cavity 13 only retains the amplitude distance of the normal vibration of the diaphragm, thereby reducing the thickness and volume of the sound module 100, which is conducive to the miniaturization and miniaturization of the sound module 100.

[0047] It can be understood that when the first channel 14 is connected to the first rear cavity 215, the second channel 15 is connected to the second rear cavity 216, so that the sound waves generated by the first vibration component 211 and the sound waves generated by the second vibration component 212 are both propagated outward from the sound hole of the rear cavity. Therefore, when the sound is superimposed or the sound is canceled, the sound effect can also be kept consistent due to the consistency of the sound hole structure, so that it can have a good sound superposition or sound cancellation effect. Similarly, the first channel 14 is connected to the first front cavity 111, and the second channel 15 is connected to the second front cavity 121, so that the sound-generating structures are both diaphragm surface sounding, and the consistency of the sound-generating structures of the two makes the sound effect also consistent, so as to have a good sound superposition or sound cancellation effect.

[0048] In another embodiment, when the first channel 14 is connected to the first rear cavity 215, the second channel 15 may also be connected to the first front cavity 111, or the first channel 14 is connected to the first front cavity 111, and the second channel 15 is connected to the second rear cavity 216. By controlling the sound wave phase when the first vibration component 211 and the second vibration component 212 make sound, the sound superposition and sound cancellation effects of the first channel 14 and the second channel 15 can also be achieved.

[0049] It can be understood that the inner cavity 17 is used to balance the air pressure inside and outside the sound module 100, so that when sound is produced, the gas in the first cavity can flow out quickly to reduce the peak air pressure in the second front cavity 121; or the external air is supplemented through the inner cavity 17 to avoid negative pressure causing adsorption of the second front cavity 121, and prevent the vibration of the sound device 2 from being affected by changes in air pressure, thereby reducing distortion.

[0050] The sound module 100 of the present technical solution includes a module shell 1 and a sound device 2, the module shell 1 is provided with a accommodating cavity 13 and a first channel 14 and a second channel 15 communicating with the accommodating cavity 13, the sound device 2 has a first vibration component 211 and a second vibration component 212 arranged in opposite directions, the sound device 2 is further provided with a first rear cavity 215 and a second rear cavity 216 located between the first vibration component 211 and the second vibration component 212, the first rear cavity 215 and the second rear cavity 216 are isolated from each other, the sound device 2 is provided in the accommodating cavity 13, and the first vibration component 211 and the module shell 1 form a first front cavity 111, and the second vibration component 212 and the module shell 1 form a second front cavity 121; by providing the first channel 14 and the second channel 15, the first rear cavity 215 and the second rear cavity 216 can be retained at the first vibration component 211. A channel 14 is connected and makes sound, and one of the second rear cavity 216 and the second front cavity 121 can be retained at the second vibration component 212 to be connected to the second channel 15 and make sound, so that when sound superposition or sound cancellation is achieved with each other through the first channel 14 and the second channel 15, the sound wave interference between the first front cavity 111 and the first rear cavity 215 at the first vibration component 211 can be reduced, and the sound wave interference between the second front cavity 121 and the second rear cavity 216 at the second vibration component 212 can be reduced, thereby improving the sound effect of the sound module 100. At the same time, the module shell 1 is also provided with an inner cavity 17, which is connected to the other of the second rear cavity 216 and the second front cavity 121, so that when sound is produced, the gas in the cavity can flow out quickly to reduce the peak pressure of the front cavity; or external air can be supplemented through the pressure relief channel to avoid negative pressure adsorption.

[0051] In one embodiment, if Figure 1 and Figure 2 As shown, the module shell 1 is also provided with a clearance groove, at least one of the first vibration component 211 and the second vibration component 212 abuts against the groove wall of the clearance groove and is enclosed with the clearance groove to form a closed inner cavity 17; at least one of the first front cavity 111 and the second rear cavity 216 is connected to the inner cavity 17, and the first front cavity 111 and the second rear cavity 216 are closed.

[0052] In the embodiment, the slot wall of the accommodation slot is configured to form a surface contact or a line contact with the surface of the vibration assembly, the edge area of the first vibration assembly 211 and the second vibration assembly 212 is pressed into the accommodation slot, the slot wall forms a radial constraint on the first vibration assembly 211 and the second vibration assembly 212, and the inner cavity 17 absorbs the air pressure change generated in the vibration process through the communication channel, wherein, when the first front cavity 111 is in communication with the inner cavity 17, the inner cavity 17 serves as a buffer cavity to reduce the pressure fluctuation amplitude inside the front cavity; when the second rear cavity 216 is in communication with the inner cavity 17, the sealed space of the inner cavity 17 forms a secondary vibration isolation barrier. Through the structure design, the leakage path of the first front cavity 111 and / or the second rear cavity 216 is cut off by the inner cavity 17, and at the same time, the amplitude of the vibration assembly is limited within the rigid support formed by the slot wall, thereby realizing the physical sealing effect independent of the sealing material. The scheme integrates the assembly positioning function and the cavity sealing function in a single accommodation slot structure, and compared with the traditional scheme, more than two independent sealing components are reduced, and the assembly efficiency is improved by more than 30%.

[0053] It can be understood that, by setting the accommodation slot structure, the present application provides precise assembly positioning for the first vibration assembly 211 and the second vibration assembly 212, and the abutting cooperation of the first vibration assembly 211 and / or the second vibration assembly 212 with the slot wall of the accommodation slot enhances the mechanical stability, and the closed inner cavity 17 formed at the same time provides additional airtight support for the front cavity or the rear cavity. The communication design of the inner cavity 17 and the front cavity or the rear cavity effectively blocks the cavity leakage path that may be generated by vibration. This structure optimization improves the airtightness and reliability of the acoustic cavity, and ensures the stability of the acoustic performance without relying on additional sealing materials.

[0054] In an embodiment, as shown in Figure 1 and Figure 2 The sound generating device 2 includes a first side wall 217 and a second side wall 218, the first side wall 217 is provided with a first sound hole 2171, the first sound hole 2171 is in communication with the first rear cavity 215 and the first channel 14, and the second side wall 218 is provided with a second sound hole 2181, the second sound hole 2181 is in communication with the second rear cavity 216.

[0055] In this embodiment, the first side wall 217 and the second side wall 218 are lateral structures of the sound device 2. The first side wall 217 and the second side wall 218 can be a side wall structure formed on the outside of the sound device 2, or a rigid support structure provided on the outside of the sound device 2, or a flat side wall surface formed by various parts of the sound device 2, etc., and the first side wall 217 and the second side wall 218 are in contact with or spaced apart from the wall of the accommodating cavity 13 so that the sound device 2 is limited in the accommodating cavity 13, wherein the first side wall 217 and The second side wall 218 can be a flat or curved structure. At the same time, the first side wall 217 and the second side wall 218 can be located on opposite sides of the sound-emitting device 2, or on adjacent sides, which is not limited here. By setting the first side wall 217 and the second side wall 218, on the one hand, it can provide physical support for the sound-emitting device 2 and be installed and connected with the accommodating cavity 13, and on the other hand, it can also guide or isolate sound waves to ensure the independence of the first rear cavity 215 and the second rear cavity 216, and ensure that the internal sound waves are not affected by external sound waves.

[0056] Furthermore, the first side wall 217 of the sound-emitting device 2 is provided with a second sound hole 2181, and the second side wall 218 of the sound-emitting device 2 is provided with a second sound hole 2181. The first sound hole 2171 passes through the first side wall 217 to connect to the first rear cavity 215, and can be connected to the first channel 14. The second sound hole 2181 passes through the second side wall 218 to connect to the second rear cavity 216, and can be connected to the second channel 15. The first sound hole 2171 and the second sound hole 2181 can be a hole structure formed by the outer shell of the sound-emitting device 2, or a notch structure or a slit-shaped structure formed by the diaphragm and the magnetic yoke 221 in the sound-emitting device 2, or the diaphragm and the magnet, etc., and are not limited here.

[0057] It can be understood that when the sound-emitting device 2 is limited in the accommodating cavity 13, the first sound hole 2171 and the second sound hole 2181 are directly integrated into the side wall of the sound-emitting device 2, thereby eliminating the need for additional pipes or connectors, reducing assembly complexity, and the first sound hole 2171 is connected to the first rear cavity 215, and the second sound hole 2181 is connected to the second rear cavity 216, so that when the first vibration component 211 and the second vibration component 212 vibrate, the sound waves generated can directly enter the first channel 14 through the guidance of the first sound hole 2171, and directly enter the second channel 15 through the guidance of the second sound hole 2181, so as to optimize the propagation path of the sound wave, realize independent guidance of sound wave propagation, and dynamically adjust the air pressure inside the first rear cavity 215 and the second rear cavity 216.

[0058] In this embodiment, the inner cavity 17 is located on the side of the second side wall facing away from the first side wall; optionally, the first channel is located on the side of the first side wall facing away from the second side wall.

[0059] In one embodiment, if Figure 1 and Figure 2 As shown, the first channel 14 is connected to the first sound hole 2171 , the second channel 15 is connected to the second sound hole 2181 , and at least the first side wall 217 of the sound-generating device 2 and the module shell 1 enclose an inner cavity 17 .

[0060] In this embodiment, the first channel 14 is connected to the first rear cavity 215 through the first sound hole 2171, and the second channel 15 is connected to the second rear cavity 216 through the second sound hole 2181, so that the sound-emitting device 2 can emit sound through the first rear cavity 215 and the second rear cavity 216. On the basis of the mutual isolation of the first rear cavity 215 and the second rear cavity 216, the two sound waves can be superimposed on or offset each other after propagating outward from the first channel 14 and the second channel 15 to achieve sound superposition and sound offset. At the same time, the sound-emitting device 2 is enclosed by at least the first side wall 217 and the module shell 1 (that is, the cavity wall of the accommodating cavity 13) to form an inner cavity. If a groove connected to the accommodating cavity 13 is provided on the module shell 1, the sound-emitting device 2 can at least cooperate with the groove at the first side wall 217 to form an inner cavity 17.

[0061] It can be understood that when the sound-emitting device 2 emits sound outward through the first rear cavity 215 and the second rear cavity 216, and transmits the sound waves outward through the first channel 14 and the second channel 15, the first front cavity 111 located on the side of the first vibration component 211 facing away from the first rear cavity 215 is connected to the inner cavity 17, and the second front cavity 121 located on the side of the second vibration component 212 facing away from the second rear cavity 216 is connected to the inner cavity 17, so as to suppress and eliminate the sound waves generated by the first vibration component 211 toward the first front cavity 111, and suppress and eliminate the sound waves generated by the second vibration component 212 toward the second front cavity 121.

[0062] At the same time, an inner cavity 17 is provided to provide independent air pressure buffer spaces for the first front cavity 111 and the second front cavity 121 respectively, and the air pressure peaks in the first front cavity 111 and the second front cavity 121 can be quickly released through the inner cavity 17 to avoid deformation of the diaphragm or collision with the shell due to pressure difference, thereby improving reliability. In addition, sound-absorbing particles are provided in the inner cavity 17, or porous sound-absorbing materials are provided on the inner wall of the inner cavity 17 to enhance the absorption effect of the inner cavity 17 on sound waves, thereby reducing the generation of standing waves in the first front cavity 111 and reducing the influence of the sound waves in the first front cavity 111 on the first rear cavity 215, as well as reducing the generation of standing waves in the second front cavity 121 and reducing the influence of the sound waves in the second front cavity 121 on the second rear cavity 216, thereby enhancing the sound superposition or sound cancellation effect between the first rear cavity 215 and the second rear cavity 216.

[0063] In one embodiment, if Figure 1 and Figure 2As shown, the first channel 14 and the second channel 15 are located on both sides of the sound-emitting device 2; optionally, the first channel 14 and the second channel 15 are symmetrically arranged about the sound-emitting device 2; it can be understood that by arranging the first channel 14 and the second channel 15 on both sides of the sound-emitting device 2 and symmetrically arranged about the sound-emitting device 2, the geometric symmetry of the propagation paths of the sound waves in the first channel 14 and the second channel 15 is ensured, thereby reducing the phase deviation caused by the structural difference, thereby achieving precise control of the phase of the sound waves generated by the first vibration component 211 and the second vibration component 212, eliminating the phase shift caused by the path difference, and the first channel 14 and the second channel 15 located on both sides of the sound-emitting device 2 face two directions away from each other to achieve precise sound wave superposition, thereby significantly enhancing the synergistic offset effect or superposition effect, so as to improve the sound module 100's sound elimination, sound leakage prevention, directional enhancement and other effects.

[0064] Optionally, the first front cavity 111 is located on a side of the first vibration component 211 facing away from the second vibration component 212, and the second sound-emitting cavity is located on a side of the second vibration component 212 facing away from the first vibration component 211. The first front cavity 111 and the second front cavity 121 are symmetrically arranged with respect to the sound-emitting device 2. It can be understood that the first front cavity 111 and the second front cavity 121 are symmetrically arranged with respect to the sound-emitting device 2 to ensure that when the first vibration component 211 generates sound waves in the direction of the first front cavity 111 and when the second vibration component 212 generates sound waves in the direction of the second front cavity 121, the first vibration component 211 and the second vibration component 212 maintain balance, and the first front cavity 111 is connected to the first channel 14. When the second front cavity 121 is connected to the second channel 15, the geometric symmetry of the propagation paths of the sound waves in the first channel 14 and the second channel 15 can be ensured, thereby reducing the phase deviation caused by structural differences, improving the consistency of the sound wave output, and thus improving the effects of sound superposition and sound cancellation. Or when the first front cavity 111 and the inner cavity 17 are connected and the second front cavity 121 and the inner cavity 17 are connected, the sound waves propagate from the first front cavity 111 and the second front cavity 121 to the inner cavity 17 and can be absorbed by the inner cavity 17, and can also simultaneously reduce the interference with the sound waves in the first rear cavity 215 and the second rear cavity 216, thereby ensuring the purity of the sound waves output by the first rear cavity 215 and the second rear cavity 216, so as to improve the output sound effect.

[0065] Optionally, the inner cavity 17 and the first front cavity 111 are interconnected; it is understandable that the inner cavity 17 and the first front cavity 111 are interconnected, and the inner cavity 17 can be uniformly set to avoid separating the inner cavity 17, reducing the difficulty of research and development and production. At the same time, the larger cavity after connection can also effectively absorb sound waves, reducing the interference between such sound waves and the sound waves of the sound. Moreover, when one of the first front cavity 111, the first rear cavity 215, the second front cavity 121 and the second rear cavity 216 cannot be set to sufficiently absorb sound waves due to limited space, the cavity is interconnected to share a common cavity to improve the absorption effect of sound waves; or the inner cavity 17 and the first front cavity 111 are isolated from each other. It is understandable that in some cases, the inner cavity 17 and the first front cavity 111 are isolated from each other to prevent sound wave crosstalk and block the cross reflection of low-frequency sound waves and high-frequency sound waves.

[0066] In one embodiment, if Figure 1 and Figure 2 As shown, the second channel 15 is connected to the second front cavity 121 , and at least the first side wall 217 of the sound-generating device 2 and the module shell 1 enclose an inner cavity 17 , which is connected to the second rear cavity 216 and the first front cavity 111 .

[0067] In this embodiment, on the basis that the first channel 14 is connected to the first rear cavity 215 through the first sound hole 2171, the second channel 15 is connected to the second front cavity 121, so that the sound-emitting device 2 can emit sound through the first rear cavity 215 and the second front cavity 121. On the basis that the first rear cavity 215 and the second rear cavity 216 are isolated from each other, the two sound waves can be superimposed on or offset each other after propagating outward from the first channel 14 and the second channel 15 to achieve sound superposition and sound offset. At the same time, the sound-emitting device 2 is at least enclosed by the first side wall 217 and the module shell 1 (that is, the cavity wall of the accommodating cavity 13) to form an inner cavity 17. If a groove connected to the accommodating cavity 13 is provided on the module shell 1, the sound-emitting device 2 can at least cooperate with the groove at the first side wall 217 to form an inner cavity 17. At the same time, the inner cavity 17 is connected to the second rear cavity 216 and the first front cavity 111.

[0068] It can be understood that when the sound-emitting device 2 emits sound outward through the first rear cavity 215 and the second front cavity 121, and transmits the sound waves outward through the first channel 14 and the second channel 15, the first front cavity 111 located on the side of the first vibration component 211 facing away from the first rear cavity 215 is connected to the inner cavity 17, and the second rear cavity 216 located on the side of the second vibration component 212 is connected to the inner cavity 17, so as to suppress and eliminate the sound waves generated by the first vibration component 211 toward the first front cavity 111, and to suppress and eliminate the sound waves generated by the second vibration component 212 toward the second front cavity 121.

[0069] At the same time, an inner cavity 17 is provided to provide independent air pressure buffer spaces for the first front cavity 111 and the second rear cavity 216 respectively, and the air pressure peaks in the first front cavity 111 and the second rear cavity 216 can be quickly released through the inner cavity 17 to prevent the diaphragm from deforming or colliding with the shell due to pressure difference, thereby improving reliability. In addition, sound-absorbing particles are provided in the inner cavity 17, or porous sound-absorbing materials are provided on the inner wall of the inner cavity 17 to enhance the absorption effect of the inner cavity 17 on sound waves, thereby reducing the generation of standing waves in the first front cavity 111 and reducing the influence of the sound waves in the first front cavity 111 on the first rear cavity 215, as well as reducing the generation of standing waves in the second rear cavity 216 and reducing the influence of the sound waves in the second rear cavity 216 on the second rear cavity 216, thereby enhancing the sound superposition or sound cancellation effect between the first rear cavity 215 and the second front cavity 121.

[0070] Of course, on the basis of the first channel 14 being connected to the first front cavity 111, the second channel 15 can be connected to the second rear cavity 216 through the second sound hole 2181, so as to achieve sound superposition or sound cancellation effect through the first front cavity 111 and the second rear cavity 216. Different from the above-mentioned same sound-generating structure (such as the first front cavity 111 and the second front cavity 121 sounding through the diaphragm surface, or the first rear cavity 215 and the second rear cavity 216 sounding through the sound hole), due to its natural symmetrical structure, it is possible to accurately control the phase of sound wave transmission to improve The effects of sound superposition and sound cancellation are achieved, and the sound effect is improved. The implementation method in this embodiment is to use asymmetric heterogeneous sounding structures (such as the first front cavity 111 and the second rear cavity 216, and the second front cavity 121 and the first rear cavity 215), and use the diaphragm surface sounding and the sound hole sounding at the same time when performing sound superposition or sound cancellation, and perform targeted tuning on different frequency bands (such as low frequency and medium and high frequency). For example, the rear cavity can be designed as a low-frequency resonance cavity, and the front cavity optimizes the high-frequency diffusion to achieve effective superposition of full-band sound waves, so as to achieve composite output of multi-frequency sound waves.

[0071] In one embodiment, if Figure 2 and Figure 3 As shown, the sound-generating device 2 includes a vibration system 21 and a magnetic circuit system 22. The vibration system 21 includes a first vibration component 211 and a second vibration component 212. The first vibration component 211 includes a first diaphragm 2111 and a first voice coil 2112 connected to each other. The second vibration component 212 includes a second diaphragm 2121 and a second voice coil 2122 connected to each other. The first vibration component 211 and the second vibration component 212 are respectively arranged on both sides of the magnetic circuit system 22. The first diaphragm 2111 and the magnetic circuit system 22 enclose a first rear cavity 215, and the second diaphragm 2121 and the magnetic circuit system 22 enclose a second rear cavity 216.

[0072] In this embodiment, the sound-generating device 2 can be a sound-generating unit of a speaker, and the speaker can be a micro speaker. The sound-generating device 2 includes a housing, a magnetic circuit system 22, a support member, and a vibration system 21. The magnetic circuit system 22 and the vibration system 21 of the sound-generating device 2 are arranged relative to each other, and the magnetic circuit system 22 is connected to the housing. The housing is used to install, fix, and support components such as the magnetic circuit system 22 and the vibration system 21. That is, the housing provides a mounting base for components such as the magnetic circuit system 22 and the vibration system 21. In this way, the sound-generating device 2 can be used as an independent component in an electronic device or a sound module 100, which is not limited here. It is understandable that the outer contour of the sound-generating device 2 can be circular or square, so that the outer contours of the housing, the magnetic circuit system 22, and the vibration system 21 are correspondingly set to circular or square. The specific design is based on actual needs and is not limited here. Optionally, the shell can be an integral structure or a plurality of split structures, which is not limited here. The shell includes a first front cover 231, a first lower shell 232, a second front cover 241 and a second lower shell 242. The first front cover 231 and the first lower shell 232 are connected, and the first front cover 231 and the first lower shell 232 are enclosed to form a first cavity. The second front cover 241 and the second lower shell 242 are connected, and the second front cover 241 and the second lower shell 242 are enclosed to form a second cavity.

[0073] It can be understood that the shell can be optionally selected as a frame or frame structure, that is, the shell has a accommodating cavity 13 with openings at both ends (that is, the first cavity and the second cavity mentioned above), the magnetic circuit system 22 is accommodated in the accommodating cavity 13 of the shell and connected to the shell, and the first vibration component 211 and the second vibration component 212 of the vibration system 21 are respectively arranged on the opposite sides of the magnetic circuit system 22, thereby forming a dual diaphragm structure, so that a magnetic circuit system 22 is used to drive the two voice coils of the vibration system 21 to drive the two diaphragms to vibrate and realize sound production, and at the same time, the double-sided diaphragms can produce sound in the same direction without increasing the external dimensions, and the vibration area of ​​the vibration system 21 is increased, thereby achieving the purpose of improving performance.

[0074] At the same time, the support member includes a first centering support piece 25 and a second centering support piece 26. The first centering support piece 25 is arranged on the first lower shell 232 and is located in the first cavity. At the same time, the first centering support piece 25 is between the first front cover 231 and the first lower shell 232. The second centering support piece 26 is arranged on the second lower shell 242 and is located in the second cavity. At the same time, the second centering support piece 26 is between the second front cover 241 and the second lower shell 242. The first centering support piece 25 and the second centering support piece 26 are also arranged on opposite sides of the magnetic circuit system 22. The first fixed vibration system 21 includes a first vibration component 211 and a second vibration component 212. The first vibration component 211 is arranged in the first cavity, and the second vibration component 212 is arranged in the second cavity.

[0075] Specifically, the first vibration component 211 includes a connected first diaphragm 2111 and a first voice coil 2112, the first diaphragm 2111 is arranged on the side of the first centering support 25 facing away from the first lower shell 232, one end of the first voice coil 2112 is connected to the centering support, and the other end of the first voice coil 2112 is suspended in the first magnetic gap 2221 formed by the magnetic circuit system 22. Similarly, the second vibration component 212 includes a connected second diaphragm 2121 and a second voice coil 2122, the second diaphragm 2121 is arranged on the side of the second centering support 26 facing away from the second lower shell 242, one end of the second voice coil 2122 is connected to the centering support, and the other end of the second voice coil 2122 is suspended in the second magnetic gap 2241 formed by the magnetic circuit system 22.

[0076] Optionally, the housing is provided with conductive terminals, and the first voice coil 2112 and the second voice coil 2122 are both electrically connected to the conductive terminals. This facilitates the connection of the first voice coil 2112 and the second voice coil 2122 with an external circuit via the conductive terminals of the sound-generating device 2.

[0077] It can be understood that the first diaphragm 2111 and the magnetic circuit system 22 enclose a first rear cavity 215 connected to the second channel 15, and the second diaphragm 2121 and the magnetic circuit system 22 enclose a second rear cavity 216 connected to the first channel 14, so that the first rear cavity 215 and the second rear cavity 216 are isolated from each other by the magnetic circuit system 22, and are respectively located on both sides of the magnetic circuit system 22. When sound waves are generated in the first rear cavity 215 and the second rear cavity 216, the sound waves are isolated from each other, and propagate and diffuse to the outside through the first channel 14 and the second channel 15 respectively, and cancel each other out during the propagation in the first channel 14 and the second channel 15, thereby enhancing the sound cancellation effect and sound privacy effect of the sound-emitting device 2.

[0078] In one embodiment, if Figures 1 to 3 As shown, the first front cover 231 is arranged on the side of the first diaphragm 2111 facing away from the second diaphragm 2121. The first front cover 231 can abut the cavity wall of the accommodating cavity 13 or be spaced apart from the cavity wall of the accommodating cavity 13. The first front cover 231 is provided with a first connecting hole 2311. A first gap is provided between the first diaphragm 2111 and the first front cover 231. The first connecting hole 2311 connects the first gap and the inner cavity 17, so that the first diaphragm 2111 and the module shell 1 are enclosed to form the first front cavity 111.

[0079] In this embodiment, the sound-emitting body is a sound-emitting body structure including a magnetic circuit system 22 and a vibration system 21, wherein the vibration system 21 is provided with a diaphragm, and the first front cover 231 is connected to the supporting frame structure of the sound-emitting body by snapping, bonding or ultrasonic welding, and the first front cover 231 is located on the side of the first diaphragm 2111 facing away from the second diaphragm 2121, and the first vibration component 211 is covered by the first front cover 231, so that the first front cover 231 and the first vibration component 211 are enclosed to form a first front cavity 111, so that the first front cover 231 can protect the first vibration component 211 and reserve a certain vibration space for the first vibration component 211.

[0080] At the same time, the first front cover 231 is provided with a first communicating hole 2311 , which is connected to the first gap and the inner cavity 17 , so as to form a first front cavity through the first diaphragm 2111 and the module housing 1 .

[0081] It can be understood that by setting the first connecting hole 2311, the airflow in the first gap can be quickly transmitted to the inner cavity 17 to avoid overload deformation of the diaphragm of the first vibration component 211, and quickly balance the air pressure, thereby reducing the influence and interference of the sound waves generated in the first front cavity 111 on the sound waves in the first rear cavity 215, and improving the purity and smoothness of the sound waves output by the first rear cavity 215.

[0082] In one embodiment, if Figures 1 to 3 As shown, the sound-emitting device 2 also includes a second front cover 241, which is arranged on the side of the sound-emitting body facing away from the first front cover 231. A second gap is provided between the second diaphragm 2121 and the second front cover 241. The second front cover 241 and the cavity wall of the accommodating cavity 13 are combined to form an air passage 2411, and the second front cover is provided with a second connecting hole 2412, which connects the second gap and the air passage 2411.

[0083] In the embodiment, the sound generating body is a sound generating structure including the magnetic circuit system 22 and the vibration system 21, wherein the vibration system 21 is provided with a diaphragm, the second front cover 241 and the first front cover 231 are arranged on two sides of the sound generating body away from each other, the second front cover 241 is connected to the support frame structure of the sound generating body by buckling or adhesion or ultrasonic welding, and the second vibration assembly 212 is covered by the second front cover 241, so that the second front cover 241 and the second diaphragm 2121 enclose a second gap, so that the second front cover 241 can protect the second vibration assembly 212 and reserve a certain vibration space for the second vibration assembly 212, at the same time, the second front cover 241 and the cavity wall of the accommodating cavity 13 enclose an air passing channel 2411, when the second rear cavity 216 is in communication with the inner cavity 17, the second communication hole 2412 arranged on the second front cover 241 communicates the second gap and the air passing channel 2411, so that the second diaphragm 2121 and the module shell 1 enclose a second front cavity 121.

[0084] It can be understood that by arranging the air passing channel 2411, the propagation path of the sound wave can be optimized to guide the sound wave from the second gap to the second channel 15 through the second communication hole 2412, and by lengthening the sound wave transmission path, the sound wave transmission path can be finely length compensated, and the first and second through cavities are arranged in a symmetrical layout to more finely control the sound wave transmission parameters (such as phase), thereby improving the sound effect after the first front cavity 111 or the first rear cavity 215 performs sound superposition or sound cancellation.

[0085] In an embodiment, as shown in Figure 2 and Figure 3 , the magnetic circuit system 22 includes a magnetic yoke 221, a first central magnetic part 222, a first edge magnetic part 223, a second central magnetic part 224, and a second edge magnetic part 225, the first central magnetic part 222 and the first edge magnetic part 223 are arranged on one side of the magnetic yoke 221, the first edge magnetic part 223 is located outside the first central magnetic part 222 and spaced from the first central magnetic part 222 to form a first magnetic gap 2221, the second central magnetic part 224 and the second edge magnetic part 225 are arranged on the other side of the magnetic yoke 221, the second edge magnetic part 225 is located outside the second central magnetic part 224 and spaced from the second central magnetic part 224 to form a second magnetic gap 2241, the first vibration assembly 211 and the second vibration assembly 212 are arranged on two sides of the magnetic circuit system 22 respectively, the first voice coil 2221 corresponds to the first magnetic gap 2221, and the second voice coil 2122 corresponds to the second magnetic gap 2241.

[0086] In this embodiment, the magnetic yoke 221 is connected to the first lower shell 232 and the second lower shell 242, and the magnetic yoke 221 is located between the first lower shell 232 and the second lower shell 242. The first central magnetic portion 222 and the first side magnetic portion 223 are provided on the side of the magnetic yoke 221 facing the first lower shell 232, and the second central magnetic portion 224 and the second side magnetic portion 225 are provided on the side of the magnetic yoke 221 facing the second lower shell 242, so that the same magnetic yoke 221 is provided with magnets on both sides thereof, wherein the first side magnetic portion 223 surrounds the first central magnetic portion 222. The first side magnetic portion 223 is arranged to be spaced apart from the first center magnetic portion 222 to form a first magnetic gap 2221, and the first voice coil 2112 is suspended in the first magnetic gap 2221 away from the end connected to the first centering support piece 25; the second side magnetic portion 225 is arranged around the second center magnetic portion 224, and the second side magnetic portion 225 is spaced apart from the second center magnetic portion 224 to form a second magnetic gap 2241, and the second voice coil 2122 is suspended in the second magnetic gap 2241 away from the end connected to the second centering support piece 26.

[0087] Among them, the magnetic yoke 221 can be an integrated structure, so that the first central magnetic portion 222 and the first side magnetic portion 223 are arranged on one side of the magnetic yoke 221, and the second central magnetic portion 224 and the second side magnetic portion 225 are arranged on the other side of the magnetic yoke 221. The magnetic yoke 221 can also include a first magnetic yoke 2211 and a second magnetic yoke 2212. The first magnetic yoke 2211 and the second magnetic yoke 2212 are stacked and connected to each other, the first central magnetic portion 222 and the first side magnetic portion 223 are arranged on the side of the first magnetic yoke 2211 facing away from the second magnetic yoke 2212, and the second central magnetic portion 224 and the second side magnetic portion 225 are arranged on the side of the second magnetic yoke 2212 facing away from the first magnetic yoke 2211. No limitation is made here.

[0088] It can be understood that by configuring the magnetic circuit system 22 to include a first central magnetic portion 222 and a first side magnetic portion 223 provided on one side of the magnetic yoke 221, and a second central magnetic portion 224 and a second side magnetic portion 225 provided on the other side of the magnetic yoke 221, a first magnetic gap 2221 and a second magnetic gap 2241 are formed on both sides of the magnetic yoke 221, respectively. In this way, the first voice coil 2112 and the second voice coil 2122 of the vibration system 21 correspond to the first magnetic gap 2221 and the second magnetic gap 2241, respectively, and conductive terminals are provided on the housing so that the first voice coil 2112 and the second voice coil 2122 correspond to the first magnetic gap 2221 and the second magnetic gap 2241, respectively. 22 are electrically connected to the conductive terminals, so that current is passed through the first voice coil 2112 and the second voice coil 2122, so that the first voice coil 2112 and the second voice coil 2122 convert electrical energy into mechanical energy in the first magnetic gap 2221 and the second magnetic gap 2241 formed by the magnetic circuit system 22, respectively, to drive the first voice coil 2112 and the second voice coil 2122 to drive the first diaphragm 2111 and the second diaphragm 2121 to vibrate respectively. Not only can the two diaphragms of the two voice coils be driven to vibrate by one magnetic circuit system 22 to achieve sound production, but double-sided diaphragm sound production can also be achieved without increasing the external dimensions.

[0089] In one embodiment, if Figure 2 and Figure 3 As shown, the first side magnet portion 223 is provided with a first sound hole 2171 corresponding to the first channel 14, and the first sound hole 2171 connects the first rear cavity 215 and the first channel 14; optionally, the second side magnet portion 225 is provided with a second sound hole 2181 corresponding to the second channel 15, and the second sound hole 2181 connects the second rear cavity 216 and the inner cavity 17; it can be understood that the first side magnet portion 223 forms a gap so that the first side magnet portion 223 is arranged around a portion of the first central magnet portion 222, and the gap is the above-mentioned first sound hole 2171, and the first sound hole 2171 connects the first rear cavity 215 and the first channel 14, so that the sound waves generated by the first rear cavity 215 and the sound waves generated by the second front cavity 121 can superimpose on each other and propagate outward through the first channel 14. Similarly, the second side magnet portion 225 forms a gap.

[0090] In one embodiment, the magnetic circuit system 22 includes a plurality of first side magnetic portions 223, the plurality of first side magnetic portions 223 are located on the outside of the first central magnetic portion 222, and two adjacent first side magnetic portions 223 are spaced apart to form a first sound hole 2171, and the first sound hole 2171 connects the first rear cavity 215 and the first channel 14; the magnetic circuit system 22 includes a plurality of second side magnetic portions 225, the plurality of second side magnetic portions 225 are located on the outside of the second central magnetic portion 224, and two adjacent second side magnetic portions 225 are spaced apart to form a second sound hole 2181, and the second sound hole 2181 connects the second rear cavity 216 and the inner cavity 17.

[0091] In this embodiment, multiple first side magnet portions 223 and multiple second side magnet portions 225 are respectively located on both sides of the magnetic circuit system 22, and a first sound hole 2171 is formed between the first side magnet portion 223 and the adjacent first side magnet portion 223, and a second sound hole 2181 is formed between the second side magnet portion 225 and the adjacent second side magnet portion 225.

[0092] Specifically, during assembly of the magnetic circuit system 22, multiple first side magnets 223 are fixed to the periphery of the first central magnet 222 in a circular array. First acoustic holes 2171 formed by two adjacent first side magnets 223 are distributed in the exit region of the first rear cavity 215, allowing sound waves within the first rear cavity 215 to be dispersed and transmitted to the first channel 14 through the first acoustic holes 2171, thereby reducing the concentration of airflow pressure at a single acoustic hole. Multiple second side magnets 225 are fixed to the periphery of the second central magnet 224 in the same circular array. Second acoustic holes 2181 formed by adjacent intervals are evenly distributed in the exit region of the second rear cavity 216, allowing sound waves within the second rear cavity 216 to be dispersed and transmitted to the inner cavity 17 through the second acoustic holes 2181, thereby avoiding phase deviation caused by differences in acoustic hole positions.

[0093] It can be understood that the present application effectively solves the phase deviation problem caused by the mismatch in the positions of the sound holes of the double-sided speakers. Symmetrical sound holes are formed by the intervals between the side magnetic parts distributed in the annular array, ensuring that the sound wave output paths of the first rear cavity 215 and the second rear cavity 216 form precise mirror symmetry in space, thereby achieving stable sound wave cancellation in the acoustic duct. This symmetrical sound hole layout eliminates the phase error caused by the deviation in the position of the sound cavity and the channel in the traditional structure, and significantly improves the reliability of sound wave cancellation.

[0094] In one embodiment, the first magnetic yoke 2211 is provided with a first sound hole 2171 and / or a second sound hole 2181, the first sound hole 2171 connects the first rear cavity 215 and the first channel 14, and the second sound hole 2181 connects the second rear cavity 216 and the inner cavity 17; the second magnetic yoke 2212 is provided with a first sound hole 2171 and / or a second sound hole 2181, the first sound hole 2171 connects the first rear cavity 215 and the first channel 14, and the second sound hole 2181 connects the second rear cavity 216 and the inner cavity 17.

[0095] In this embodiment, the first magnetic yoke 2211 and the second magnetic yoke 2212 are components of the magnetic circuit system 22, corresponding to the positions of the first vibrating assembly 211 and the second vibrating assembly 212, respectively. The first sound hole 2171 and the second sound hole 2181 are through-hole structures provided in the magnetic yoke. Their shapes can be circular, square, or irregular, and the aperture size is designed according to the requirements of sound wave conduction. The sound hole of the first magnetic yoke 2211 corresponds to the position of the first rear cavity 215 or the second rear cavity 216, and the sound hole of the second magnetic yoke 2212 corresponds to the position of the second rear cavity 216 or the first rear cavity 215. The magnetic yoke is made of a magnetically conductive metal, and the sound holes are formed by stamping or casting.

[0096] Specifically, when the first magnetic yoke 2211 is provided with a first sound hole 2171, the sound waves in the first rear cavity 215 directly enter the first channel 14 through the first sound hole 2171, without relying on the sound hole formed by the interval of the side magnetic part. When the second magnetic yoke 2212 is provided with a second sound hole 2181, the sound waves in the second rear cavity 216 directly enter the inner cavity 17 through the second sound hole 2181. The setting of the magnetic yoke sound hole allows the number and position of the first sound hole 2171 and the second sound hole 2181 to be adjusted independently. For example, the first magnetic yoke 2211 is only provided with the first sound hole 2171, the second magnetic yoke 2212 is only provided with the second sound hole 2181, or the same magnetic yoke is provided with the first sound hole 2171 and the second sound hole 2181 at the same time. Through the direct connection between the magnetic yoke sound hole and the channel, the redundancy of the sound wave conduction path is eliminated, and the accuracy of the sound wave phase control is improved, thereby optimizing the dual vibration source sound wave cancellation effect.

[0097] It can be understood that the present application realizes the precise acoustic coupling between the rear cavity of the sound-emitting device 2 and the sound channel, effectively reducing the influence of the yoke structure on the phase of the sound wave. The symmetrical arrangement of the sound holes on the yoke keeps the sound wave transmission paths of the first rear cavity 215 and the second rear cavity 216 of equal length. At the same time, the geometric matching of the sound holes and the channel eliminates the sound wave interference caused by the misalignment of the sound cavity and the pipeline in the traditional structure, and significantly improves the cancellation efficiency of the reverse sound wave.

[0098] Optionally, the first side magnet portion 223 is an integral annular structure; or, the first side magnet portion 223 includes multiple, multiple first side magnet portions 223 are arranged at intervals around the first center magnet portion 222; optionally, the second side magnet portion 225 is an integral annular structure; or, the second side magnet portion 225 includes multiple, multiple second side magnet portions 225 are arranged at intervals around the second center magnet portion 224.

[0099] It can be understood that the first side magnetic portion 223 and the second side magnetic portion 225 can be an integrally formed long strip ring structure, which is respectively arranged around the first central magnetic portion 222 and the second central magnetic portion 224, wherein the first side magnetic portion 223 and the second side magnetic portion 225 are partially provided with a gap, the gap of the first side magnetic portion 223 forms a first sound hole 2171, and the gap of the second side magnetic portion 225 forms a second sound hole 2181, so that the first sound hole 2171 is arranged corresponding to the first channel 14 and connects the first rear cavity 215 and the first channel 14, so that the first sound hole 2171 is provided in correspondence with ... The two sound holes 2181 are arranged corresponding to the inner cavity 15 and connect the second rear cavity 216 and the inner cavity 15; the first side magnetic part 223 can also include multiple magnets, and the second side magnetic part 225 includes multiple magnets, multiple magnets are arranged around the first central magnetic part 222, and multiple magnets are arranged around the second central magnetic part 224, so that a gap is formed between two adjacent magnets, and the gap forms a first sound hole 2171 connected to the first channel 14 and the first rear cavity 215, and forms a second sound hole 2181 connected to the inner cavity 15 and the second rear cavity 216.

[0100] In one embodiment, the sound module 100 also includes a module shell 1, the module shell 1 is provided with a first channel 14 and an inner cavity 17, the sound device 2 also includes a first shell 23, the first vibration component 211 is provided on the first shell 23, the first shell 23 is provided with a first sound hole 2171, the first sound hole 2171 connects the first rear cavity 215 and the first channel 14; optionally, the sound device 2 also includes a second shell 24, the second vibration component 212 is provided on the second shell 24, the second shell 24 is provided with a second sound hole 2181, the second sound hole 2181 connects the second rear cavity 216 and the inner cavity 17.

[0101] In this embodiment, the first shell 23 is fixedly connected to the first vibration component 211 through an injection molding process, and a through hole is opened on the shell as a first sound hole 2171, the axis of the first sound hole 2171 is perpendicular to the plane of the first diaphragm 2111, one end of the first sound hole 2171 is opened and connected to the first rear cavity 215, and the other end is connected to the external first channel 14; similarly, the second shell 24 is fixedly connected to the second vibration component 212 through an injection molding process, and a through hole is opened on the shell as a second sound hole 2181, the axis of the second sound hole 2181 is perpendicular to the plane of the second diaphragm 2121, one end of the second sound hole 2181 is opened and connected to the second rear cavity 216, and the other end is connected to the external inner cavity 17; the second shell 24 adopts a structural design symmetrical to the first shell 23, and the aperture of the second sound hole 2181 is consistent with the first sound hole 2171 to ensure the consistency of the sound wave transmission path. The first housing 23 and the second housing 24 are fixed to both sides of the magnetic circuit system 22 by snapping or bonding, and sealing rubber rings are provided on the edges of the housings to prevent sound wave leakage.

[0102] Specifically, when the first vibration component 211 is installed inside the first housing 23, the edge of the first diaphragm 2111 is bonded and fixed to the annular protrusion on the inner side of the housing through a hot pressing process, forming a sealed first rear cavity 215. A first sound hole 2171 is opened on the side wall of the housing, with its entrance end extending to the top space of the first rear cavity 215 and its exit end connected to the external first channel 14 through a curved channel. When the first vibration component 211 is operating, the sound waves generated in the first rear cavity 215 enter the first channel 14 through the first sound hole 2171. The cross-sectional area of ​​the sound wave transmission path maintains a continuous and gradual change, avoiding acoustic impedance mismatch caused by structural mutations. The implementation process of the second housing 24 maintains mirror symmetry with the first housing 23. The sound waves in the second rear cavity 216 are guided to the inner cavity 17 through the second sound hole 2181. When the first sound hole 2171 and the second sound hole 2181 adopt the same size and shape, the phase difference of the sound waves in the two channels remains stable.

[0103] It can be understood that the present application realizes the connection between the first rear cavity 215 and the second rear cavity 216 and the external space. The setting of the first sound hole 2171 and the second sound hole 2181 enables the sound waves in the first rear cavity 215 and the second rear cavity 216 to propagate to the external space through the first channel 14 and the inner cavity 17 respectively. This structural design enables the sound-generating device 2 to more effectively utilize the sound waves generated by the rear cavity space, thereby improving the sound output efficiency. At the same time, by reasonably designing the shape and size of the first channel 14 and the inner cavity 17, the propagation characteristics of the sound waves can be adjusted to further optimize the sound quality. In addition, the setting of the first shell 23 and the second shell 24 provides protection for the vibration component and enhances the structural stability of the sound-generating device 2. The symmetrical layout of the first shell 23 and the second shell 24 further ensures that the sound wave transmission path lengths of the first channel 14 and the inner cavity 17 are consistent, thereby eliminating the phase error caused by structural asymmetry.

[0104] In one embodiment, the sound module 100 is installed in an electronic device, which also includes a device housing. The first vibration component 211 and the second vibration component 212 of the sound module 100 are arranged in the device housing; the first vibration component 211 is spaced apart from the device housing to form a first front cavity 111 of the sound module 100, and the second vibration component 212 is spaced apart from the device housing to form a second front cavity 121 of the sound module 100.

[0105] At the same time, the device shell is provided with a accommodating cavity and a first channel 14 and a second channel 15 connecting the accommodating cavity. The first channel 14 connects to the first rear cavity 215 of the sound module 100, and the second channel 15 connects to the second front cavity 121 of the sound module 100.

[0106] In the embodiment, the device shell of the electronic device is used to mount, fix and support the sound production module 100 and other components, that is, the device shell provides a mounting basis for the sound production module 100 and other components. In order to facilitate the installation and protection of the sound production module 100 and the vibration assembly and other components, the device shell has a containing cavity 13, which can isolate the sound production module 100 and the vibration surface of the sound production module 100 from the external environment to avoid direct leakage of sound waves, and provide a closed environment for directional output or cancellation of sound waves. Optionally, the structure of the device shell can be a mounting shell, a box body or a box body structure with a containing cavity 13, and the device shell can be an integral structure or a split structure, such as the device shell including a first shell and a second shell, that is, the device shell is formed into an integral structure by connecting the first shell and the second shell. Of course, in other embodiments, the device shell can also be formed by one-piece molding, which is not limited here.

[0107] It can be understood that the device shell can be made of a thin steel sheet, so that the device shell can be designed to be thinner, thereby greatly increasing the cavity volume of the containing cavity 13 in the device shell, effectively increasing the volume of the front sound cavity and the rear sound cavity surrounded by the sound production module 100 and the device shell, and thereby improving the acoustic performance of the sound production module 100, especially the low-frequency acoustic performance. At the same time, the sound production module 100 is fixed in the device shell, so that heat dissipation can be achieved by the device shell made of metal material, and the heat dissipation performance of the sound production module 100 is improved.

[0108] The application also provides an electronic device including the sound production module 100. The specific structure of the sound production module 100 is referred to the foregoing embodiments. Since the electronic device adopts all the technical solutions of the foregoing embodiments, it at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be repeated here.

[0109] It can be understood that the electronic device includes a television, a projector, a display, a smart phone, a smart sound, a notebook computer, a headset, a walkie-talkie, a car audio, smart glasses and the like, and the sound production module 100 is preferably applied to electronic devices with special needs for sound privacy and directional sound propagation, such as the receiver of a smart phone, OWS (Open Wearable Stereo) full-open wearable earphone, smart glasses, XR and the like.

[0110] As the sound production module 100 in the application is arranged at the receiver of the smart phone, when the user uses the smart phone to answer the phone, the sound waves (i.e. the first sound wave and the second sound wave) produced by the sound production device 2 in the sound production module 100 are respectively propagated outward along the first channel 14 and the second channel 15, and the first sound wave and the second sound wave are offset due to the opposite phase, so that the loudness of the sound is greatly attenuated, at the same time, the phase difference of the first sound wave and the second sound wave can be adjusted to enhance the sound wave close to the ear direction, so that on the one hand, the sound leakage and leakage of the phone receiver side can be reduced, and the sound privacy effect can be improved, on the other hand, the sound can be more concentratedly transmitted to the ear canal, and the sound clarity and directional propagation effect can be improved.

[0111] As the sound production module 100 in the application is arranged in the OWS earphone, after the first sound wave and the second sound wave produced by the sound production device 2 are propagated through the first channel 14 and the second channel 15, they are offset to greatly attenuate the loudness of the sound, so as to reduce the propagation of the sound wave in the direction other than the direction towards the ear canal, so that the sound wave is concentratedly propagated to the ear canal, so as to suppress the sound leakage, improve the sound privacy effect, and improve the sound clarity and directional propagation effect.

[0112] And in the smart glasses, the sound production module 100 is also arranged near the ear of the frame to realize the multiple output of images, texts and sounds, wherein the principle and effect of the sound production module 100 applied in the smart glasses in the application are the same as those of the sound production module 100 arranged in the OWS earphone, which will not be repeated here.

[0113] The above only describes the exemplary embodiments of the application, and does not limit the patent scope of the application, any equivalent structural transformation made by using the content of the application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the application.

Claims

1. A sound module, characterized in that: The sound module includes: A sound-generating device, the sound-generating device comprising a first vibration component and a second vibration component disposed in opposite directions, the sound-generating device further comprising a first rear cavity and a second rear cavity located between the first vibration component and the second vibration component, the first rear cavity and the second rear cavity being isolated from each other, and a first front cavity and a second front cavity being formed on opposite sides of the first vibration component and the second vibration component, respectively; The first rear cavity and the second front cavity are isolated from each other and communicate with the external space respectively. The first front cavity and the second rear cavity are closed.

2. The sound module according to claim 1, wherein: The sound module further includes a module housing, the module housing having a receiving cavity and a first channel and a second channel communicating with the receiving cavity, the first vibration component and the second vibration component being disposed in the receiving cavity; The first vibration component and the cavity wall of the accommodating cavity are enclosed to form the first front cavity, and the second vibration component and the cavity wall of the accommodating cavity are enclosed to form the second front cavity; The first channel is connected to the first rear cavity, and the second channel is connected to the second front cavity.

3. The sound module according to claim 2, wherein: The sound-generating device has a first side wall and a second side wall that are separated from each other, the first side wall is provided with a first sound hole corresponding to the first channel, the first sound hole connects the first rear cavity and the first channel, and the second side wall is provided with a second sound hole; The sound-generating device and the cavity wall of the accommodating cavity are combined to form an inner cavity, and the second sound hole connects the second rear cavity and the inner cavity.

4. The sound module according to claim 3, wherein: The inner cavity is located on a side of the second side wall facing away from the first side wall; And / or, the first channel is located on a side of the first side wall facing away from the second side wall.

5. The sound module according to claim 3, wherein: The inner cavity and the first front cavity are connected to each other; or, the inner cavity and the first front cavity are isolated from each other.

6. The sound module according to any one of claims 1 to 5, characterized in that: The sound-generating device comprises: a vibration system comprising a first vibration assembly and a second vibration assembly, wherein the first vibration assembly comprises a first diaphragm and a first voice coil connected together, and the second vibration assembly comprises a second diaphragm and a second voice coil connected together; and The first diaphragm and the magnetic circuit system enclose the first rear cavity, and the second diaphragm and the magnetic circuit system enclose the second rear cavity.

7. The sound module according to claim 6, wherein: The magnetic circuit system includes a magnetic yoke, a first central magnetic portion, a first side magnetic portion, a second central magnetic portion and a second side magnetic portion, the first central magnetic portion and the first side magnetic portion are arranged on one side of the magnetic yoke, the first side magnetic portion is located on the outside of the first central magnetic portion, and is spaced from the first central magnetic portion to form a first magnetic gap, the second central magnetic portion and the second side magnetic portion are arranged on the other side of the magnetic yoke, the second side magnetic portion is located on the outside of the second central magnetic portion, and is spaced from the second central magnetic portion to form a second magnetic gap, the first vibration component and the second vibration component are respectively arranged on both sides of the magnetic circuit system, the first voice coil corresponds to the first magnetic gap, and the second voice coil corresponds to the second magnetic gap.

8. The sound module according to claim 6, wherein: The sound-generating device and the cavity wall of the accommodating cavity are combined to form an inner cavity. The sound-generating device further comprises a first front cover provided on a side of the first diaphragm facing away from the second diaphragm, and a first gap is provided between the first diaphragm and the first front cover. The first front cover is provided with a first connecting hole, which connects the first gap and the inner cavity, so that the first diaphragm and the module shell are enclosed to form the first front cavity, and / or the sound-emitting device also includes a second front cover provided on the side of the second diaphragm facing away from the first diaphragm, a second gap is provided between the second diaphragm and the second front cover, and the second front cover is provided with a second connecting hole, which connects the second gap and the second channel, so that the second diaphragm and the module shell are enclosed to form the second front cavity.

9. The sound module according to claim 6, wherein: The sound module further includes a module housing, wherein the module housing is provided with a first channel and an inner cavity; The first side magnet portion is provided with a first sound hole, the first sound hole communicating with the first rear cavity and the first channel; the second side magnet portion is provided with a second sound hole, the second sound hole communicating with the second rear cavity and the inner cavity; Alternatively, the magnetic circuit system includes a plurality of first side magnetic portions, the plurality of first side magnetic portions are located outside the first central magnetic portion, and two adjacent first side magnetic portions are spaced apart to form a first sound hole, the first sound hole connects the first rear cavity and the first channel; the magnetic circuit system includes a plurality of second side magnetic portions, the plurality of second side magnetic portions are located outside the second central magnetic portion, and two adjacent second side magnetic portions are spaced apart to form a second sound hole, the second sound hole connects the second rear cavity and the inner cavity; Alternatively, the sound-emitting device further comprises a first shell, the first vibration component is disposed in the first shell, the first shell is provided with a first sound hole, the first sound hole connects the first rear cavity and the first channel, and the sound-emitting device further comprises a second shell, the second vibration component is disposed in the second shell, the second shell is provided with a second sound hole, the second sound hole connects the second rear cavity and the inner cavity.

10. The sound module according to claim 7, wherein: The magnetic conductive yoke includes a first magnetic yoke and a second magnetic yoke stacked together, the first central magnetic portion and the first side magnetic portion are arranged on the side of the first magnetic yoke facing away from the second magnetic yoke, and the second central magnetic portion and the second side magnetic portion are arranged on the side of the second magnetic yoke facing away from the first magnetic yoke.

11. The sound module according to claim 1, wherein: The sound module is installed in an electronic device, and the electronic device further includes a device housing, the device housing having a receiving cavity and a first channel and a second channel communicating with the receiving cavity, and the first vibration component and the second vibration component of the sound module are arranged in the receiving cavity; The first vibration component and the cavity wall of the accommodating cavity are enclosed to form a first front cavity, and the second vibration component and the cavity wall of the accommodating cavity are enclosed to form a second front cavity; The first channel is connected to the first rear cavity, and the second channel is connected to the second front cavity.

12. An electronic device, characterized in that: The electronic device includes the sound module according to any one of claims 1 to 11.

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