Loudspeaker module and terminal device

Abstract

The present disclosure provides a loudspeaker module and a terminal device, and relates to the technical field of loudspeakers. The loudspeaker module comprises a first shell, a second shell, a vibration unit and a film layer. The first shell and the second shell enclose a containing cavity, the vibration unit is located in the containing cavity, a front cavity is formed between the vibration unit and the first shell, and a rear cavity is formed between the vibration unit and the second shell. One end of the film layer is located inside the rear cavity, and the other end extends to the outside of the rear cavity. The film layer is used for conducting heat inside the rear cavity to the outside. The loudspeaker module of the present disclosure can conduct heat in the rear cavity to the outside by using the film layer, thereby playing a role in accelerating heat dissipation inside the loudspeaker module.

Description

Technical Field

[0001] This disclosure relates to the field of loudspeaker technology, and in particular to a loudspeaker module and terminal device. Background Technology

[0002] Overheating in terminal devices has consistently impacted user experience. For products like smartphones and tablets, overheating has become a significant factor influencing consumer purchasing decisions. Furthermore, these devices typically contain multiple heat-generating components, such as the motherboard, battery, motor, and speaker.

[0003] Among them, the loudspeaker, as an electroacoustic conversion element, only has about 5% of the electrical signal energy effectively converted into sound signal, while about 95% of the electrical signal energy is converted into heat. How to efficiently dissipate this heat has always been a problem to be solved in this field. Summary of the Invention

[0004] This disclosure provides a speaker module and terminal device that can solve the problem of speakers not being able to dissipate heat efficiently.

[0005] The technical solution is as follows:

[0006] On one hand, a loudspeaker module is provided, the loudspeaker module comprising: a first housing, a second housing, a vibrating unit, and a diaphragm;

[0007] The first housing and the second housing form a receiving cavity, the vibration unit is located in the receiving cavity, the vibration unit and the first housing form a front cavity, and the vibration unit and the second housing form a rear cavity;

[0008] One end of the membrane is located inside the rear cavity, and the other end extends to the outside of the rear cavity. The membrane is used to conduct heat from inside the rear cavity to the outside.

[0009] In some embodiments, the film layer is made of graphene material.

[0010] In some embodiments, the sidewall of the rear cavity is provided with an outlet channel, and the membrane extends along the outlet channel to the outside of the rear cavity;

[0011] The membrane layer and the outlet channel are filled with a sealing material.

[0012] In some embodiments, at least a portion of the membrane layer located inside the rear cavity extends into the acoustic radiation range of the vibration unit and is spaced apart from the vibration unit; the membrane layer is able to absorb and dissipate the acoustic energy in the rear cavity by means of its own deformation during the vibration of the vibration unit.

[0013] In some embodiments, the edges of the membrane layer located inside the rear cavity are respectively connected to the circumferential sidewalls of the rear cavity to divide the rear cavity into a first acoustic cavity close to the vibrating unit and a second acoustic cavity away from the vibrating unit.

[0014] In some embodiments, the speaker module further includes a frame; the frame is located within the rear cavity, and the diaphragm is attached to the surface of the frame.

[0015] In some embodiments, the skeleton is made of a polymer material.

[0016] In some embodiments, the speaker module further includes auxiliary sound-absorbing material, which fills at least one of the first acoustic cavity and the second acoustic cavity.

[0017] On the other hand, a terminal device is provided, the terminal device including the speaker module described in this disclosure.

[0018] In some embodiments, the terminal device further includes a housing assembly, the other end of which is connected to the housing assembly to conduct heat from the rear cavity to the housing assembly.

[0019] The beneficial effects of the technical solution provided in this disclosure include at least the following:

[0020] The speaker module disclosed herein has a vibration unit disposed within a cavity enclosed by a first housing and a second housing. The vibration unit forms a front cavity with the first housing and a rear cavity with the second housing. A diaphragm is disposed within the rear cavity, with the other end of the diaphragm extending to the outside of the rear cavity. The diaphragm can conduct heat from the rear cavity to the outside, thereby accelerating the heat dissipation inside the speaker module. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the speaker module provided in the embodiments of this disclosure;

[0023] Figure 2 yes Figure 1 Enlarged view of a portion of point A in the middle;

[0024] Figure 3 This is a schematic diagram showing the connection between the membrane layer and the circumferential sidewall of the rear cavity provided in an embodiment of this disclosure;

[0025] Figure 4 This is a diagram illustrating the sound wave effect in a speaker module provided in an embodiment of this disclosure;

[0026] Figure 5 This is a schematic diagram of the state of the membrane layer and the framework body provided in the embodiments of this disclosure;

[0027] Figure 6 This is a schematic diagram of the structure of the terminal device provided in the embodiments of this disclosure;

[0028] Figure 7 This is a structural block diagram of a terminal device provided in another embodiment of this disclosure.

[0029] The reference numerals in the figure are respectively:

[0030] 100. Speaker module; 200. Housing assembly;

[0031] 1. First shell;

[0032] 2. Second shell;

[0033] 3. Vibration unit;

[0034] 4. Film layer; 401. Graphene sheet;

[0035] 5. Anterior cavity;

[0036] 6. Rear cavity; 61. Outlet channel; 62. Sealing material; 601. First acoustic cavity; 602. Second acoustic cavity;

[0037] 7. Skeleton body;

[0038] 8. Auxiliary sound-absorbing materials;

[0039] 901. Radio frequency circuit; 902. Storage unit; 903. Input unit; 904. Display unit; 905. Sensor; 906. Audio circuit; 9061. Microphone; 907. Antenna assembly; 908. Processor; 909. Power supply;

[0040] a. Initial sound wave; b. First transmitted sound wave; c. Reflected sound wave; d. Second transmitted sound wave. Detailed Implementation

[0041] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0042] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0043] Unless otherwise defined, all technical terms used in the embodiments of this disclosure have the same meaning as commonly understood by one of ordinary skill in the art.

[0044] As a sound-generating unit, the speaker module is primarily responsible for converting received electrical signals into audible sound signals. As an electroacoustic transducer, during operation, besides converting some electrical energy into mechanical energy to ultimately radiate sound waves, most of the electrical energy is converted into heat energy, causing the temperature inside the speaker module to rise. If the voice coil temperature exceeds a certain range, it will affect the sound quality of the miniature speaker and even its normal operation. Therefore, heat dissipation needs to be considered in advance during the design of speaker modules.

[0045] In recent years, the loudness of speakers in terminal devices has gradually increased, and the amplitude of voice coils has gradually increased, which has further aggravated the heat generation of speaker modules and caused certain heat dissipation problems.

[0046] Adding sound-absorbing materials (such as bass powder) to miniature speakers to improve acoustic performance has become a common practice, but most sound-absorbing materials do not improve the product's heat dissipation capabilities.

[0047] Currently, the main ways to improve the heat dissipation efficiency of miniature speaker modules and reduce the voice coil temperature are:

[0048] 1) Optimize the speaker module's speaker structure and materials, such as using high thermal conductivity steel to make the speaker module's speaker housing.

[0049] 2) Optimize the speaker module structure by adopting an exposed speaker core structure and using stainless steel material in parts of the module housing to enhance the module's heat dissipation efficiency.

[0050] 3) Attach high thermal conductivity materials to the speaker module housing, such as graphite sheets, to enhance heat dissipation efficiency.

[0051] However, the above solutions only improve heat dissipation efficiency by increasing the thermal conductivity of the speaker body and speaker module housing, and dissipate heat through air convection and heat conduction. Since air has a very low thermal conductivity, the heat dissipation problem of the speaker module still cannot be effectively solved.

[0052] Therefore, this disclosure provides a speaker module that uses a diaphragm layer to conduct heat from the rear cavity to the outside, thereby accelerating the heat dissipation inside the speaker module.

[0053] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0054] Figure 1 This is a schematic diagram of the structure of the speaker module 100 provided in the embodiments of this disclosure; Figure 2 yes Figure 1 Enlarged view of a portion of point A in the middle.

[0055] On the one hand, combined with Figure 1-3 As shown, this embodiment provides a speaker module 100, which includes: a first housing 1, a second housing 2, a vibration unit 3, and a diaphragm layer 4.

[0056] The first housing 1 and the second housing 2 form a receiving cavity, the vibration unit 3 is located in the receiving cavity, the vibration unit 3 and the first housing 1 form a front cavity 5, and the vibration unit 3 and the second housing 2 form a rear cavity 6.

[0057] One end of the membrane 4 is located inside the rear cavity 6, and the other end extends to the outside of the rear cavity 6. The membrane 4 is used to conduct heat from inside the rear cavity 6 to the outside.

[0058] In this embodiment, the speaker module 100 has a vibration unit 3 disposed in the accommodating cavity formed by the first housing 1 and the second housing 2. The vibration unit 3 forms a front cavity 5 between itself and the first housing 1, and a rear cavity 6 between itself and the second housing 2. A membrane layer 4 is disposed in the rear cavity 6, and the other end of the membrane layer 4 extends to the outside of the rear cavity 6. The membrane layer 4 can conduct heat from the rear cavity 6 to the outside, thereby accelerating the heat dissipation inside the speaker module 100.

[0059] In some possible implementations, the rear cavity 6 is a closed rear cavity 6. The functions of using a closed rear cavity 6 include:

[0060] (1) It can effectively prevent acoustic short circuits and obtain better low-frequency radiation efficiency.

[0061] (2) It can reduce the amplitude of the diaphragm in the vibrating element, reduce the damage to the voice coil lead wire due to the large amplitude, avoid the noise of the diaphragm hitting the bottom, and at the same time, the voice coil can work well in the linear range under the small amplitude state, which helps to reduce the nonlinear distortion of the system.

[0062] Inside the sealed rear cavity 6, since air cannot circulate between the inside and outside, the heat generated by the vibration unit 3 during the electroacoustic conversion process is largely accumulated inside the rear cavity 6. In related technologies, methods such as improving the thermal conductivity of the sidewalls of the rear cavity 6 are usually adopted. However, in this solution, one end of the membrane layer 4 is inside the rear cavity 6 and the other end is outside the rear cavity 6. This membrane layer 4 can conduct the heat inside the rear cavity 6 to the outside, thereby promoting the dissipation of heat inside the rear cavity 6 and preventing the temperature of the rear cavity 6 from becoming too high and affecting the normal operation of the vibration unit 3.

[0063] Compared to external heat dissipation solutions, the membrane layer 4 in this embodiment is located inside the rear cavity 6, close to the heat source inside the speaker module 100, namely the vibration unit 3. It can absorb heat better during vibration and dissipate the heat using the part located outside the rear cavity 6.

[0064] In some other possible implementations, the vibrating unit 3 includes at least a diaphragm and a voice coil, with the voice coil connected to the diaphragm; the voice coil has at least one set of conductive coils, and when an electrical signal is passed through the conductive coil, the conductive coil generates a magnetic field force, which interacts with the ambient magnetic field to produce regular vibration, thereby driving the diaphragm to vibrate and produce sound, thus completing the electroacoustic conversion.

[0065] For example, the diaphragm is made of at least one of the following materials: artificial material, natural material, or composite material.

[0066] Among them, artificial materials include, but are not limited to: polypropylene (PP), Kevlar, carbon fiber, glass fiber and other chemical fibers, as well as various metals such as aluminum, beryllium, titanium, or ceramics, diamonds and so on.

[0067] Natural materials include various wood fibers that have undergone different processing, along with cotton, wool, and other materials, which are then processed through a pulping process.

[0068] Composite materials include those made by combining two or more materials, such as Kevlar blended with carbon fiber, synthetic fiber blended with natural fiber, or they may be made directly into sandwich-like units, such as aluminum diaphragm bonded to a film.

[0069] In some embodiments, film layer 4 is made of graphene. Graphene has excellent thermal conductivity, with a single layer of graphene exhibiting a thermal conductivity as high as 5300 W / mK. Graphene has a very stable structure, and the connections between carbon atoms within graphene are flexible. When an external force is applied to graphene, the carbon atom planes bend and deform, allowing the carbon atoms to maintain structural stability without having to rearrange themselves to accommodate the external force.

[0070] In this embodiment, heat accumulates within the rear cavity 6, and due to the sound wave energy emitted by the vibration unit 3, the rear cavity 6 vibrates frequently both inside and outside. This embodiment utilizes the unique high thermal conductivity and structural stability of graphene material. The graphene film layer 4 provides excellent heat transfer performance and stability within the rear cavity 6, ensuring the heat dissipation performance and normal acoustic performance of the speaker module 100.

[0071] Combination Figure 2 As shown, in some embodiments, the sidewall of the rear cavity 6 is provided with an outlet channel 61, and the membrane layer 4 extends along the outlet channel 61 to the outside of the rear cavity 6; the space between the membrane layer 4 and the outlet channel 61 is filled with a sealing material 62.

[0072] In the speaker module 100 of this embodiment, an outlet channel 61 is provided on the side wall of the rear cavity 6, so that the diaphragm 4 can connect the inside of the rear cavity 6 and the outside of the rear cavity 6. In order to ensure the airtightness of the rear cavity 6, a sealing material 62 is filled between the diaphragm 4 and the outlet channel 61, thereby improving the heat dissipation efficiency of the rear cavity 6 without affecting the acoustic performance of the speaker module 100.

[0073] In some possible implementations, the sealing material 62 can be silicone, sealant, etc., which can seal the outlet channel 61 while also fixing it, fixing the membrane layer 4 to the side wall of the rear cavity 6, preventing the membrane layer 4 in the rear cavity 6 from vibrating excessively due to the sound waves, thus preventing leakage from the outlet channel 61.

[0074] It should be noted that, Figure 1 and Figure 2 The shapes and positions of the first housing 1, the second housing 2, and the vibration unit 3 shown are merely examples and do not constitute a limitation on the technical solutions of this disclosure.

[0075] Correspondingly, the shape and position of the export channel 61 and the film layer 4 are merely examples and do not constitute a limitation on the technical solution of this disclosure.

[0076] Figure 3 This is a schematic diagram showing the connection between the membrane layer and the circumferential sidewall of the rear cavity provided in an embodiment of this disclosure; Figure 4 This is a sound wave effect diagram of a speaker module provided in this embodiment, wherein the number and thickness of the arrows represent the magnitude of the sound wave energy. For example, the initial sound wave a has the most arrows, and the thickest arrows represent the greatest sound wave energy.

[0077] Combination Figure 3 , 4As shown, in some embodiments, at least a portion of the membrane layer 4 located inside the rear cavity 6 extends into the acoustic radiation range of the vibration unit 3 and is arranged at intervals from the vibration unit 3; the membrane layer 4 can absorb and consume the acoustic energy in the rear cavity 6 by its own deformation during the vibration of the vibration unit 3.

[0078] In the speaker module 100 of this embodiment, the vibration unit 3 vibrates under the drive of an electrical signal. The vibration of the diaphragm drives the vibration of the air, thereby generating a vibrating airflow in the rear cavity 6. Driven by the vibrating airflow, the diaphragm layer 4 deforms and can absorb the sound waves generated by the diaphragm in the rear cavity 6.

[0079] Combination Figure 3 , 4 As shown, in some embodiments, the edge of the membrane layer 4 located inside the rear cavity 6 is connected to the circumferential sidewall of the rear cavity 6 to divide the rear cavity 6 into a first acoustic cavity 601 close to the vibration unit 3 and a second acoustic cavity 602 away from the vibration unit 3.

[0080] refer to Figure 4 As shown, the initial sound wave a generated by the vibrating unit 3 (e.g., diaphragm) propagates into the rear cavity 6 (first sound cavity 601). When it first passes through the diaphragm 4, the diaphragm 4 absorbs some of its energy through its deformation. A portion of the sound wave passes through and continues to radiate backward as the first transmitted sound wave b (in the second sound cavity 602). At this time, the energy of the first transmitted sound wave b is reduced compared to the initial sound wave a.

[0081] The first transmitted sound wave b is reflected after reaching the bottom wall of the rear cavity 6 and continues to radiate forward as a reflected sound wave c (in the second acoustic cavity 602). The energy level of the reflected sound wave c is equivalent to that of the first transmitted sound wave b.

[0082] After the reflected sound wave c reaches the diaphragm 4, the diaphragm 4 absorbs some of its energy again by deforming itself. Only a small portion of the sound wave passes through and eventually returns to the vibrating unit 3 (in the first acoustic cavity 601) as a second transmitted sound wave d. This portion of the second transmitted sound wave d has little impact on the acoustic performance of the speaker module 100.

[0083] The energy level of the second transmitted sound wave d is greatly reduced compared to the initial sound wave a. Therefore, in this embodiment, a membrane layer 4 is added to the rear cavity 6. In addition to improving the heat dissipation efficiency of the rear cavity 6, it can also absorb sound wave energy, reduce reflected sound wave interference, and thus improve the low-frequency sound performance of the speaker module 100.

[0084] It should be noted that in the related technologies, in the scheme where no diaphragm layer 4 is provided in the rear cavity 6, only the initial sound wave and the reflected sound wave appear in the rear cavity 6, and the energy level of the reflected sound wave is similar to that of the initial sound wave. The reflected sound wave has a large interference with the diaphragm, which makes the low-frequency performance of the speaker module 100 poor.

[0085] Figure 5 This is a schematic diagram of the state of the membrane layer and the skeleton body provided in the embodiments of this disclosure.

[0086] Combination Figure 5 As shown, in some embodiments, the speaker module 100 further includes a frame 7; the frame 7 is located in the rear cavity 6, and the diaphragm 4 is attached to the surface of the frame 7.

[0087] In this embodiment, the speaker module 100 uses the skeleton 7 as the carrier of the diaphragm 4. After the diaphragm 4 is attached to the surface of the skeleton 7, the skeleton 7 can effectively improve the strength and toughness of the diaphragm 4, making it more suitable for high-frequency deformation scenarios in response to sound waves, and enhancing the reliability and durability of the diaphragm 4.

[0088] After the diaphragm 4 is attached to the surface of the skeleton 7, the skeleton 7 remains hollow. Thus, the diaphragm 4 effectively divides the rear cavity 6 of the speaker module 100 into three completely independent chambers: the first sound cavity 601, the skeleton cavity, and the second sound cavity 602. Based on this, the speaker module 100 has more diverse frequency response tuning methods, which helps to improve the acoustic performance of the speaker module 100.

[0089] In this embodiment, the two ends of the skeleton cavity are wrapped by the membrane layer 4, forming a structure similar to a diaphragm drum. When the membrane layer 4 deforms due to sound waves, the skeleton cavity deforms synchronously with the membrane layer 4. The diaphragm drum can resonate with the membrane layer 4, thereby improving the absorption effect of the membrane layer 4 on sound waves, further reducing the energy level of the second transmitted sound wave, and improving the acoustic performance of the vibration unit 3.

[0090] In some possible implementations, multilayer graphene sheets 401 are adhered to the surface of the skeleton body 7 to form the aforementioned film layer 4.

[0091] In this embodiment, the diaphragm drum resonance effect formed by the multilayer graphene sheets is equivalent to a Helmholtz resonant cavity, which is equivalent to an acoustic capacitor; while the deformable membrane layer 4 is equivalent to the soft boundary of the sound field, which can fully absorb and consume the energy of the initial sound wave, significantly reducing the energy of the transmitted sound wave, and effectively creating a free spatial sound field in the rear cavity 6 of the speaker module 100, reducing the oscillation resistance of the diaphragm in the speaker unit, thereby effectively improving the low-frequency performance of the speaker module 100.

[0092] It should be noted that, Figure 5 The shapes and positions of the framework and graphene sheet 401 shown are merely examples and do not constitute a limitation on the technical solutions of this disclosure.

[0093] In some embodiments, the framework 7 is made of a polymer material. Using a polymer material to make the framework 7 has advantages such as low mass, large surface area, and abundant internal pores, which can facilitate the deformation of the film layer 4 and induce a resonance effect.

[0094] For example, graphene oxide is first impregnated onto the foam skeleton 7, and then multiple layers of graphene sheets are attached to the foam skeleton 7 using the solution-plastic foaming technology (Science Advances).

[0095] In some possible implementations, a low-cost polymer foam is used to construct the framework 7, which can ensure both the acoustic friction loss of the overall pores and the resonant absorption of acoustic waves by the microstructure.

[0096] Combination Figure 1 As shown, in some embodiments, the speaker module 100 further includes auxiliary sound-absorbing material 8, which fills at least one of the first acoustic cavity 601 and the second acoustic cavity 602. By filling the first acoustic cavity 601 and / or the second acoustic cavity 602 with auxiliary sound-absorbing material 8, the acoustic performance of the speaker can be improved.

[0097] For example, the auxiliary sound-absorbing material is granular, and the particle size is preferably 0.1mm-1mm.

[0098] On the other hand, combining Figure 6 As shown, this embodiment provides a terminal device, which includes the speaker module 100 disclosed herein. Wherein, Figure 6 This is a schematic diagram of the structure of the terminal device provided in the embodiments of this disclosure.

[0099] The terminal device of this embodiment includes the speaker module 100 of this disclosure and has all the technical effects of this disclosure.

[0100] Combination Figure 6 As shown, in some embodiments, the terminal device further includes a housing assembly 200, with the other end of the membrane layer 4 connected to the housing assembly 200 to conduct heat from the rear cavity 6 to the housing assembly 200.

[0101] Thus, the terminal device can achieve heat dissipation by taking advantage of the large surface area of ​​the housing component 200 and its direct contact with the external environment.

[0102] The terminal device in this disclosure can be a mobile phone, tablet computer, laptop computer, smart bracelet, smart watch, smart helmet, smart glasses, or other device that benefits from an electroacoustic conversion element. This disclosure does not limit the device to such devices.

[0103] Among some possible implementations, refer to Figure 7As shown, the terminal device may further include a radio frequency circuit 901, a storage unit 902, an input unit 903, a display unit 904, a sensor 905, an audio circuit 906, an antenna assembly 907, a processor 908, and a power supply 909. The radio frequency circuit 901, storage unit 902, input unit 903, display unit 904, sensor 905, audio circuit 906, and antenna are all connected to the processor 908; the power supply 909 provides power to the entire electronic device.

[0104] Specifically, the radio frequency circuit 901 is used to receive and transmit signals. The storage unit 902 is used to store data command information. The input unit 903 is used to input information, and may include a touch panel and other input devices such as operation buttons. The display unit 904 may include a display panel, etc. The sensor 905 includes an infrared sensor 905, a laser sensor 905, etc., used to detect user proximity signals, distance signals, etc. The antenna assembly 907 is used to receive and transmit radio frequency signals, and the processor 908 is used to process the data information of the electronic device.

[0105] The speaker module 100 and the microphone 9061 (or microphone) are electrically connected to the processor 908 via the audio circuit 906 for receiving and sending sound signals.

[0106] It should be noted that in this article, "several" and "at least one" refer to one or more, while "multiple" and "at least two" refer to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0107] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0108] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0109] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0110] In the description of this specification, the references to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the embodiments or examples that are included in at least one embodiment or example of this disclosure.

[0111] The above description is merely an embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A speaker module, characterized in that, The loudspeaker module (100) includes: a first housing (1), a second housing (2), a vibration unit (3), and a diaphragm (4); The first housing (1) and the second housing (2) form a receiving cavity, the vibration unit (3) is located in the receiving cavity, the vibration unit (3) and the first housing (1) form a front cavity (5), and the vibration unit (3) and the second housing (2) form a rear cavity (6); One end of the membrane (4) is located inside the rear cavity (6), and the other end extends to the outside of the rear cavity (6). The membrane (4) is used to conduct heat from inside the rear cavity (6) to the outside. At least a portion of the membrane layer (4) located inside the rear cavity (6) extends into the acoustic radiation range of the vibration unit (3) and is spaced apart from the vibration unit (3); the membrane layer (4) can absorb and consume the acoustic energy in the rear cavity (6) by its own deformation during the vibration of the vibration unit (3).

2. The speaker module according to claim 1, characterized in that, The membrane (4) is made of graphene material.

3. The speaker module according to claim 1, characterized in that, The rear cavity (6) has an outlet channel (61) on its side wall, and the membrane layer (4) extends along the outlet channel (61) to the outside of the rear cavity (6); The membrane layer (4) and the outlet channel (61) are filled with sealing material (62).

4. The speaker module according to any one of claims 1-3, characterized in that, The edges of the membrane layer (4) located inside the rear cavity (6) are connected to the circumferential sidewalls of the rear cavity (6) to divide the rear cavity (6) into a first sound cavity (601) close to the vibration unit (3) and a second sound cavity (602) away from the vibration unit (3).

5. The speaker module according to claim 4, characterized in that, The speaker module (100) also includes a frame (7); the frame (7) is located in the rear cavity (6), and the diaphragm (4) is attached to the surface of the frame (7).

6. The speaker module according to claim 5, characterized in that, The skeleton (7) is made of polymer material.

7. The speaker module according to claim 4, characterized in that, The speaker module (100) further includes auxiliary sound-absorbing material (8), which fills at least one of the first sound cavity (601) and the second sound cavity (602).

8. A terminal device, characterized in that, The terminal device includes the speaker module (100) according to any one of claims 1-7.

9. The terminal device according to claim 8, characterized in that, The terminal device further includes a housing assembly (200), wherein the other end of the membrane layer (4) extending to the outside of the rear cavity (6) is connected to the housing assembly (200) to conduct heat inside the rear cavity (6) to the housing assembly (200).

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