Speaker modules and outdoor fixed audio equipment

Abstract

This invention discloses a speaker module and an outdoor fixed audio device. The speaker module includes: a speaker assembly; a housing with a speaker cavity and a sound outlet communicating with the speaker cavity, the speaker assembly being fixed inside the speaker cavity; a first metal mesh and a second metal mesh covering the sound outlet, one end of the first and second metal meshes being electrically connected, and the other ends of the first and second metal meshes being respectively connected to electrical energy of opposite phase. This invention solves the problem of water stains remaining on the metal mesh hindering speaker sound production and causing speaker failure.

Description

Technical Field

[0001] This invention relates to the field of loudspeaker technology, and in particular to a loudspeaker module and an outdoor fixed audio device. Background Technology

[0002] When speaker modules are used in outdoor fixed audio equipment, water stains are easily left on the speaker mesh in rainy or humid environments. This can hinder the speaker's sound production, especially severely suppressing high frequencies, resulting in low volume or noise. Water stains can even remain on the speaker diaphragm, damaging the diaphragm adhesive over time and causing the speaker to fail. Currently, the common solution is to add a waterproof housing or cover. However, this increases the design complexity of the speaker module's housing and also affects the speaker's sound output. Furthermore, once water gets into the waterproof housing or cover, it cannot actively drain the water. Summary of the Invention

[0003] The main objective of this invention is to provide a speaker module and an outdoor fixed audio device, which aims to solve the problem that water stains remaining on the metal mesh fabric can obstruct the speaker from producing sound and cause the speaker to malfunction.

[0004] To achieve the above objectives, the present invention proposes a loudspeaker module, the loudspeaker module comprising:

[0005] Speaker assembly;

[0006] The housing has a speaker housing cavity and a sound outlet communicating with the speaker housing cavity, and the speaker assembly is fixed inside the speaker housing cavity;

[0007] A first metal mesh and a second metal mesh are covered over the sound outlet. One end of the first metal mesh and the second metal mesh are electrically connected, and the other end of the first metal mesh and the second metal mesh are respectively connected to electrical energy with opposite phases.

[0008] Optionally, the first metal mesh fabric includes a first metal mesh fabric body and a first conductive portion protruding from both ends of the first metal mesh fabric body.

[0009] The first metal mesh fabric includes a second metal mesh fabric body and a second conductive portion protruding from both ends of the second metal mesh fabric body; wherein the first conductive portion and the second conductive portion located at one end are electrically connected.

[0010] The first conductive part and the second conductive part located at the other end are respectively connected to electrical energy with opposite phases.

[0011] Optionally, the first metal mesh body and the second metal mesh body are insulated from each other.

[0012] Optionally, the speaker module further includes:

[0013] An electronic control component is electrically connected to the first metal mesh fabric and the second metal mesh fabric respectively. The electronic control component is used to detect the humidity of the first metal mesh fabric and the second metal mesh fabric, and when the humidity of the first metal mesh fabric and / or the second metal mesh fabric reaches a first preset humidity, it provides electrical energy with opposite phase to the first metal mesh fabric and the second metal mesh fabric respectively, so as to control the first metal mesh fabric and the second metal mesh fabric to convert electrical energy into heat energy.

[0014] Optionally, the electronic control component is further configured to stop supplying electrical energy to the first metal mesh and the second metal mesh when the humidity of the first metal mesh and / or the second metal mesh is less than or equal to a second preset humidity; wherein the first preset humidity is greater than the second preset humidity.

[0015] Optionally, the speaker module further includes:

[0016] A first temperature sensing device is disposed close to the first metal mesh and / or the second metal mesh, the temperature sensing device being used to detect the temperature of the first metal mesh and the second metal mesh and output a temperature detection signal;

[0017] The electronic control component is also connected to the first temperature detection device. The electronic control component is also used to provide or stop providing electrical energy to the first and second metal mesh fabrics according to the temperature detection signal of the mesh fabric when providing electrical energy to the first and second metal mesh fabrics.

[0018] Optionally, the first metal mesh and the second metal mesh are fixedly connected to the housing by screws / buckles;

[0019] Alternatively, the first metal mesh and the second metal mesh may also have riveting portions, and be riveted and fixed to the housing by the riveting portions;

[0020] Alternatively, the first metal mesh and the second metal mesh are bonded to the housing.

[0021] Optionally, the speaker module further includes:

[0022] An insulating layer is applied to both sides of the first and second metal mesh fabrics.

[0023] Optionally, the housing has a speaker housing cavity, the lower end of which, near the sound outlet, is inclined toward the speaker assembly;

[0024] And / or, the upper end of the speaker housing cavity near the sound outlet is inclined away from the speaker assembly.

[0025] The present invention also proposes an outdoor fixed audio device, including the speaker module as described above.

[0026] The speaker module of the present invention comprises a speaker assembly, a housing, and a first metal mesh and a second metal mesh. The housing has a speaker housing cavity and a sound outlet communicating with the speaker housing cavity, thereby fixing the speaker assembly within the speaker housing cavity. The first and second metal meshes are then covered over the sound outlet. The first and second metal meshes are made of materials with high thermal conductivity. The reuse of the first and second metal meshes improves the heat dissipation rate of the speaker assembly and also increases the evaporation rate of water stains remaining on the first and second metal meshes. The present invention provides equal but opposite electrical energy to the first and second metal meshes, allowing them to cancel each other outward electromagnetic radiation and reduce electromagnetic interference caused by heating. The present invention solves the problem of water stains remaining on the metal mesh hindering speaker sound production, especially severely suppressing high frequencies, leading to low volume or noise, and even the problem of water stains remaining on the speaker diaphragm damaging the diaphragm adhesive over time, causing speaker failure. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a speaker module according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of an embodiment of the first metal mesh and the second metal mesh in the speaker module of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of an embodiment of the electronic control component of the present invention applied to a speaker module;

[0031] Figure 4 This is a schematic diagram of the circuit structure of an embodiment of the electronic control component of the present invention;

[0032] Figure 5 for Figure 4A schematic diagram of the circuit structure of one embodiment of the main controller.

[0033] Explanation of icon numbers:

[0034] label name label name 100 Speaker components 322 Second conductive part 200 case 400 Humidity detection device 310 First metal mesh 500 Electronic control components 320 Second metal mesh 510 Main controller 311 First metal mesh body 520 drive 312 First conductive part 600 Temperature sensing device 321 Second metal mesh body 700 Second temperature sensing device

[0035] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0039] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0040] This invention proposes a speaker module.

[0041] This speaker module is suitable for use in outdoor fixed audio equipment, such as cameras, outdoor speakers, smart doorbells, etc. With the increasing development of outdoor fixed audio equipment, people have higher and higher requirements for the sound quality of speaker modules. Speaker modules typically add a high-mesh mesh to the speaker outlet. Because the mesh openings are small and the spacing between the holes is also small, when the speaker module is used in outdoor fixed audio equipment, water stains can easily remain on the mesh in rainy or humid environments. This can hinder speaker sound production, especially severely suppressing high frequencies, resulting in low volume or noise; even water stains left on the speaker diaphragm can damage the diaphragm adhesive over time, leading to speaker failure.

[0042] Reference Figures 1 to 5 To address the aforementioned problems, in one embodiment of the present invention, the speaker module includes:

[0043] Speaker assembly 100;

[0044] The housing 200 is provided with a speaker housing cavity and a sound outlet communicating with the speaker housing cavity, and the speaker assembly 100 is fixed in the speaker housing cavity;

[0045] A first metal mesh 310 and a second metal mesh 320 are provided, which cover the sound outlet. One end of the first metal mesh 310 and the second metal mesh 320 are electrically connected, and the other end of the first metal mesh 310 and the second metal mesh 320 are respectively connected to electrical energy with opposite phases.

[0046] In this embodiment, the shape and size of the housing 200 can be designed according to the size and frequency (high, mid, and low frequencies) of the speaker assembly 100. The housing 200 can be made of waterproof materials such as plastics (the plastics can be rigid plastics, such as ABS, POM, PS, PMMA, PC, PET, PBT, PPO, etc.). This is more conducive to improving the stability of the housing 200, thereby effectively improving the practicality, reliability, and durability of the housing 200. The speaker assembly 100 is an air-conducting speaker. The speaker assembly includes a vibration system and a magnetic circuit system. The vibration system includes a diaphragm and a voice coil that drives the diaphragm to vibrate. The voice coil is connected to the diaphragm. The magnetic circuit system includes a frame and a magnetic component mounted on the frame. The magnetic component can be a magnet, which can be a permanent magnet. The magnetic component can be made of natural magnetite or artificial magnet. When the speaker assembly is working, the magnetic component generates a magnetic field to drive the voice coil assembly to drive the diaphragm to vibrate, thereby converting the electrical signal into a sound signal and realizing the transmission of the sound signal. The basin frame is made of magnetic material, usually iron-based.

[0047] The speaker assembly 100 and the housing 200 are fixed together by screws, i.e., the connection between the two is a threaded connection. The speaker assembly 100 has connecting holes around its periphery, and the housing 200 has threaded holes corresponding to the periphery of the speaker assembly 100. The speaker assembly 100 can be stably installed by passing screws through the connecting holes and threaded holes. When the speaker assembly 100 is installed inside the housing 200, the speaker cavity can be sealed. At this time, the front end of the speaker assembly 100 faces the outside of the housing 200, and the rear end faces the inside of the housing 200. The speaker assembly 100, the first metal mesh 310, and the second metal mesh 320 can form the front acoustic cavity of the speaker module, and the sealed space formed by the speaker assembly 100 and the housing 200 is the rear acoustic cavity of the speaker module.

[0048] The first metal mesh 310 and the second metal mesh 320 can prevent external objects from puncturing the diaphragm in the speaker assembly 100, and can also provide waterproofing for a certain period of time. The higher the mesh count of the first metal mesh 310 and the second metal mesh 320, the stronger their waterproofing effect. The first metal mesh 310 and the second metal mesh 320 can also be used for dust prevention, sound tuning, etc. The materials of the first metal mesh 310 and the second metal mesh 320 can be stainless steel, aluminum, aluminum alloy, copper, copper alloy, iron, iron alloy, silver, and silver alloy, etc. Of course, in other embodiments, other metal materials or their alloys can also be used, which is not limited here.

[0049] It should be noted that loudspeakers generate heat during operation. Due to the small size and complex internal structure of loudspeaker modules, heat dissipation is often a problem. The high temperatures generated during loudspeaker operation can affect components such as the diaphragm and magnetic circuit system, causing changes in diaphragm elasticity and demagnetization of the magnetic circuit system, which seriously affects the sound performance of the loudspeaker.

[0050] Therefore, this invention utilizes the fact that the sound waves generated by the speaker assembly 100 are mainly emitted from the front acoustic cavity. The vibration of the diaphragm and the transmission of sound waves cause airflow in the front acoustic cavity, creating airflow between the front acoustic cavity and the external space. The heat generated by the speaker assembly 100 during operation can be transferred to the first metal mesh 310 and the second metal mesh 320 located in the front acoustic cavity through radiation from the diaphragm. Thus, through thermal radiation and the action of airflow, the heat dissipation rate of the speaker assembly 100 can be improved, and heat can be conducted to the external space more efficiently. Furthermore, the thermal conductivity of the first metal mesh 310 and the second metal mesh 320 can save the use of other heat dissipation devices, reducing the size caused by heat dissipation devices. Alternatively, when other heat dissipation devices (e.g., other heat dissipation devices can be installed in the rear acoustic cavity of the speaker assembly 100) are simultaneously used to dissipate heat from the speaker assembly 100, the number of heat dissipation points of the speaker assembly 100 can be increased, further improving the heat dissipation rate of the speaker assembly 100.

[0051] When the heat generated by the speaker assembly 100 radiates onto the first metal mesh 310 and the second metal mesh 320, the temperature of the first metal mesh 310 and the second metal mesh 320 will be higher than the ambient temperature. If water stains remain on the first metal mesh 310 and the second metal mesh 320 at this time, the heat generated by the speaker assembly 100 can accelerate the evaporation of these water stains, allowing the water stains between the first metal mesh 310 and the second metal mesh 320 and the diaphragm to evaporate quickly, ensuring that the first metal mesh 310, the second metal mesh 320, and the speaker assembly 100 maintain a dry environment. In some embodiments, the speaker assembly 100 can also be provided with a controllable heat source, which can actively heat the first metal mesh 310 and the second metal mesh 320 when water stains remain on them. The first metal mesh 310 and the second metal mesh 320 of the present invention are made of a material with high thermal conductivity. By reusing the first metal mesh 310 and the second metal mesh 320, the heat dissipation rate of the speaker assembly 100 can be improved. At the same time, when water stains remain on the first metal mesh 310 and / or the second metal mesh 320, the evaporation rate of the water stains can be increased.

[0052] The first metal mesh 310 and the second metal mesh 320 each have a power input terminal arranged opposite to each other, specifically a positive power terminal and a negative power terminal. The positive power terminal of the first metal mesh 310 and the negative power terminal of the second metal mesh 320 are located at the same end of both metal meshes, and the negative power terminal of the first metal mesh 310 and the positive power terminal of the second metal mesh 320 are located at the same end of both metal meshes. The negative power terminal of the first metal mesh 310 and the positive power terminal of the second metal mesh 320 are electrically connected as one unit. When power is supplied to the first metal mesh 310 and the second metal mesh 320, the positive power terminal of the first metal mesh 310 is connected to the positive terminal or live wire of the power supply, and the positive power terminal of the second metal mesh 320 is connected to the negative terminal or neutral wire of the power supply. When alternating current (AC) is connected to the first metal mesh 310 and the second metal mesh 320 during the positive half-cycle, power can flow into the positive terminal of the first metal mesh 310, pass through the negative terminal of the first metal mesh 310 and the positive terminal of the second metal mesh 320, and then flow out from the negative terminal of the second metal mesh 320. When alternating current (AC) is connected to the first metal mesh 310 and the second metal mesh 320 during the negative half-cycle, power can flow into the negative terminal of the second metal mesh 320, pass through the positive terminals of the second metal mesh 320 and the first metal mesh 310, and then flow out from the positive terminal of the first metal mesh 310. When direct current (DC) is connected to the first metal mesh 310 and the second metal mesh 320, power can flow into the positive terminal of the first metal mesh 310, pass through the negative terminals of the first metal mesh 310 and the second metal mesh 320, and then flow out from the negative terminal of the second metal mesh 320.

[0053] In summary, during the flow of power through the first metal mesh 310 and the second metal mesh 320, the currents flowing through the first metal mesh 310 and the second metal mesh 320 form differential signals, that is, the currents are equal in magnitude but opposite in direction. In this way, the electromagnetic radiation generated by the first metal mesh 310 and the second metal mesh 320 can cancel each other outward, which helps to prevent electromagnetic interference to other circuits such as radio frequency in the speaker assembly 100 during the heating process of the first metal mesh 310 and the second metal mesh 320.

[0054] The speaker module of the present invention comprises a speaker assembly 100, a housing 200, and a first metal mesh 310 and a second metal mesh 320. The housing 200 has a speaker housing cavity and a sound outlet communicating with the speaker housing cavity, thereby fixing the speaker assembly 100 within the speaker housing cavity; and the first metal mesh 310 and the second metal mesh 320 cover the sound outlet. The first metal mesh 310 and the second metal mesh 320 of the present invention are made of a material with high thermal conductivity. By reusing the first metal mesh 310 and the second metal mesh 320, the heat dissipation rate of the speaker assembly 100 can be improved. Simultaneously, when water stains remain on the first metal mesh 310 and the second metal mesh 320, the evaporation rate of the water stains can be increased. This invention provides equal but opposite electrical energy to the first metal mesh 310 and the second metal mesh 320, allowing them to cancel each other outward electromagnetic radiation and reducing electromagnetic interference caused by heating. This invention also solves the problem of water stains remaining on the metal mesh 300 hindering speaker sound production, especially causing severe high-frequency suppression, resulting in low volume or noise. Furthermore, water stains left on the speaker diaphragm can damage the diaphragm adhesive over time, leading to speaker failure.

[0055] Reference Figure 1 or Figure 2 In one embodiment, the first metal mesh 310 includes a first metal mesh body 311 and a first conductive portion 312 protruding from both ends of the first metal mesh body 311.

[0056] The first metal mesh fabric 310 includes a second metal mesh fabric body 321 and a second conductive portion 322 protruding from both ends of the second metal mesh fabric body 321; wherein the first conductive portion 312 and the second conductive portion 322 located at one end are electrically connected.

[0057] The first conductive part 312 and the second conductive part 322 located at the other end are respectively connected to electrical energy with opposite phases.

[0058] In this embodiment, the two first conductive portions 312 of the first metal mesh 310 and the second conductive portion 322 of the second metal mesh 320 can be two welding areas derived from the respective metal mesh bodies of the two metal meshes. The two welding areas can be fixed to the housing 200 to form a metal resistor, and an electrical connection between the first metal mesh 310 and the electrical control component 500 is achieved through conductive components, such as cables or flexible circuit boards. When it is necessary to control the heating of the metal mesh, equal but opposite electrical energy is provided to the first metal mesh 310 and the second metal mesh 320, thereby driving the first metal mesh 310 and the second metal mesh 320 to work. When it is not necessary to control the heating of the first metal mesh 310 and the second metal mesh 320, the supply of electrical energy to the first metal mesh 310 and the second metal mesh 320 is stopped. In some embodiments, the resistance of the metal mesh can be controlled by adjusting the cross-sectional area, length, pore density, etc. of the metal mesh body, thereby adjusting the heating power of the metal mesh body.

[0059] Reference Figure 1 or Figure 2 In one embodiment, the first metal mesh body 311 and the second metal mesh body 321 are insulated from each other.

[0060] In this embodiment, insulating varnish can be sprayed between the first metal mesh body 311 and the second metal mesh body 321. The two first metal mesh bodies 311 and the second metal mesh body 321 can be spaced apart or bonded together with insulating adhesive to form a whole. By insulating the first metal mesh body 311 and the second metal mesh body 321, the two metal mesh bodies are equivalent to twisted pairs. When providing electrical energy to the first metal mesh body 310 and the second metal mesh body 320, each metal mesh body is equivalent to a conductor covered with an insulating layer. The electrical energy transmitted on the two metal mesh bodies is equal in magnitude and opposite in direction, so the electromagnetic waves radiated during transmission are canceled out by the electromagnetic waves emitted from the other metal mesh body, effectively reducing the degree of signal interference.

[0061] Reference Figure 3 In one embodiment, the speaker module further includes:

[0062] An electronic control component 500 is electrically connected to the first metal mesh fabric 310 and the second metal mesh fabric 320, respectively. The electronic control component 500 is used to detect the humidity of the first metal mesh fabric 310 and the second metal mesh fabric 320, and when the humidity of the first metal mesh fabric 310 and / or the second metal mesh fabric 320 reaches a first preset humidity, it provides electrical energy with opposite phase to the first metal mesh fabric 310 and the second metal mesh fabric 320, respectively, so as to control the first metal mesh fabric 310 and the second metal mesh fabric 320 to convert electrical energy into heat energy.

[0063] In this embodiment, the electronic control component 500 can compare the received humidity detection signal with a preset humidity threshold (first preset humidity). When the humidity of the first metal mesh fabric 310 and the second metal mesh fabric 320 reaches the first preset humidity, electrical energy is supplied to the first metal mesh fabric 310 and the second metal mesh fabric 320 to drive them to work, so that the first metal mesh fabric 310 and the second metal mesh fabric 320 convert electrical energy into heat energy, thereby drying the water stains on the first metal mesh fabric 310 and the second metal mesh fabric 320. When the humidity of the first metal mesh fabric 310 and the second metal mesh fabric 320 is less than the first preset humidity, the supply of electrical energy to the first metal mesh fabric 310 and the second metal mesh fabric 320 is stopped, and the first metal mesh fabric 310 and the second metal mesh fabric 320 stop heating. The first preset humidity can be set according to the environment, geographical location, daytime temperature changes, and nighttime temperature changes of the speaker module application. For example, in environments with abundant rainfall and persistently cold and damp conditions, the first preset humidity can be set lower; in environments with less rainfall and higher temperatures, the first preset humidity can be set higher. The preset temperature can also be adjusted according to the season. For example, in summer and autumn, when rainfall is less and temperatures are higher, the first preset humidity can be set higher; in spring and winter, when rainfall is more and temperatures are lower, the first preset humidity can be set lower. Furthermore, the preset humidity can be set differently for daytime and nighttime, for higher and lower latitudes, and for higher and lower altitudes. The preset temperature in this embodiment can also be adjusted according to the user's actual application environment to adapt to different environments and set different preset temperatures. In some embodiments, the first preset humidity can also be set such that the heat generated by the speaker assembly 100 is insufficient to heat and dry the water stains on the first metal mesh 310 and the second metal mesh 320. That is, the heat generated by the speaker assembly 100 can dry some of the water stains, but it cannot guarantee that the first metal mesh 310 and the second metal mesh 320 will remain dry in a short period of time.

[0064] The electronic control component 500 includes, but is not limited to:

[0065] Electronic control board (not shown in the figure);

[0066] A switch 400 is disposed in the speaker module, and the switch 400 is used to output a heating / stop heating trigger signal when it is triggered;

[0067] The main controller 510, connected to the switch 400, is used to generate and output a corresponding control signal based on the heating / stop heating trigger signal.

[0068] The heating driver 520 is electrically connected to the main controller 510. The heating driver 520 provides electrical energy to the first metal mesh 310 and the second metal mesh 320 or stops providing electrical energy according to the control signal.

[0069] In this embodiment, the electronic control board can serve as a carrier for the circuit function of the speaker module and is disposed within the housing 200 of the speaker module. When the speaker module is applied to a camera or a smart doorbell, it can also be disposed within the housing 200 of the camera, smart doorbell, etc.

[0070] First method

[0071] The switch 400 includes a humidity detection device, which is used to detect the humidity of the first metal mesh 310 and the second metal mesh 320, and output a humidity detection signal.

[0072] The electronic control component 500 can control whether the metal mesh cloth works based on the relationship between the humidity detection signal and the first preset humidity.

[0073] The humidity detection device can be a humidity sensor, a heating control switch, or other device used to detect humidity. When the switch 400 is implemented using a humidity sensor, the humidity sensor detects the humidity of the first metal mesh 310 and the second metal mesh 320 and outputs a humidity detection signal, which is also a heating / stop heating trigger signal. The humidity sensor can be placed close to the first metal mesh 310 and the second metal mesh 320, or it can be placed on the housing 200100 of the speaker module, for example, on the inner and / or outer side walls of the housing 200100. The humidity sensor can be implemented using a MEMS chip. The switch 400 can also be implemented using a humidity-sensitive resistor. When the switch 400 is implemented using a humidity-sensitive resistor, a pull-up resistor can also be provided. The pull-up resistor is connected to the output terminal of the humidity-sensitive resistor, and the other end of the humidity-sensitive resistor is connected to a DC power supply. The humidity-sensitive resistor and the pull-up resistor form a series voltage divider circuit. During operation, the humidity signal is converted into an electrical signal (impedance or capacitance, etc.) and then output to the electronic control component 500. After the humidity sensor detects humidity, to improve detection accuracy, the electronic control component 500 may further include a signal processing circuit that filters and amplifies the electrical signal, and then compares the filtered and amplified electrical signal with a preset threshold. The electronic control component 500 can compare the received humidity detection signal with a first preset humidity, and the electronic control component 500 can determine whether to provide power to the first metal mesh 310 and the second metal mesh 320 based on the humidity detection signal. The main controller 510 can be implemented using an amplifier or a microprocessor such as a microcontroller or DSP. When implemented using an amplifier, the positive input terminal of the amplifier can be connected to a reference voltage to characterize the first preset humidity, while the negative input terminal is connected to the output terminal of the humidity detection device 400. When the detected humidity of the first metal mesh fabric 310 and the second metal mesh fabric 320 is greater than or equal to the first preset humidity, the amplifier outputs a high-level control signal to control the heating of the first metal mesh fabric 310 and the second metal mesh fabric 320. When the detected humidity of the first metal mesh fabric 310 and the second metal mesh fabric 320 is less than the first preset humidity, the amplifier outputs a low-level control signal to stop the heating of the first metal mesh fabric 310 and the second metal mesh fabric 320. The amplifier can be implemented using a negative feedback proportional amplifier circuit, with Vin as the input voltage, Vo as the output voltage, and the amplification factor A = Vo / Vin = -Rf / Rin.

[0074] When using a microprocessor, those skilled in the art can integrate hardware circuits and software programs into the microprocessor to control the heating of the first metal mesh fabric 310 and the second metal mesh fabric 320. That is, the microprocessor can integrate functions to analyze and compare the humidity of the first metal mesh fabric 310 and the second metal mesh fabric 320 with a first preset humidity level, and then control the heating / stopping of the first metal mesh fabric 310 and the second metal mesh fabric 320 based on the comparison result. The heating driver 520 can be a switching device, such as a MOSFET or IGBT. The heating driver 520 can operate or stop operating according to the high / low level control signal output by the main controller 510. For example, if the main controller 510 determines that the humidity of the first metal mesh 310 and the second metal mesh 320 is less than a first preset humidity based on the humidity detection signal, it will output a low level "0" to turn off the driver. At this time, there is no power output, and the first metal mesh 310 and the second metal mesh 320 will not be heated. If the main controller 510 determines that the humidity of the first metal mesh 310 and the second metal mesh 320 is greater than the first preset humidity based on the humidity detection signal, it will output a high level "1" to turn on the driver and provide power to the first metal mesh 310 and the second metal mesh 320 for heating.

[0075] In another embodiment, when controlling the heating of the first metal mesh 310 and the second metal mesh 320, the electronic control component 500 can also calculate the heating current and heating time required by the first metal mesh 310 and the second metal mesh 320 based on the working status and working time of the speaker assembly 100. That is, during the process of controlling the heating of the first metal mesh 310 and the second metal mesh 320, the power of the first metal mesh 310 and the second metal mesh 320 can be adjusted in real time according to the working status of the speaker module, thereby achieving rapid heating of the first metal mesh 310 and the second metal mesh 320, while reducing the power consumption caused by heating the first metal mesh 310 and the second metal mesh 320, thus achieving energy saving and emission reduction.

[0076] The present invention also includes an electronic control component 500 that can compare the received humidity detection signal with a preset humidity threshold (first preset humidity). When the humidity of the first metal mesh fabric 310 and the second metal mesh fabric 320 reaches the first preset humidity, electrical energy is supplied to the first metal mesh fabric 310 and the second metal mesh fabric 320 to drive them to work, so that the first metal mesh fabric 310 and the second metal mesh fabric 320 convert electrical energy into heat energy, thereby drying the water stains on the first metal mesh fabric 310 and the second metal mesh fabric 320. The present invention solves the problem that residual water stains on the first metal mesh fabric 310 and the second metal mesh fabric 320 hinder speaker sound production, especially severely suppressing high frequencies, resulting in low volume or noise, and even that residual water stains on the speaker diaphragm can damage the diaphragm adhesive over time, leading to speaker failure. In this embodiment, when the switch 400 can also be a heating control switch, the heating control switch can be a manual control switch or a humidity controller. When the manual control switch is triggered by the user, it outputs a heating trigger signal or a stop heating trigger signal. The humidity controller can output corresponding heating / stop heating trigger signals according to different humidity levels.

[0077] Second method

[0078] Based on the first method, a second preset humidity is set, and the electronic control component 500 is also used to stop supplying electrical energy to the first metal mesh 310 and the second metal mesh 320 when the humidity of the first metal mesh 310 and the second metal mesh 320 is less than or equal to the second preset humidity; wherein, the first preset humidity is greater than the second preset humidity.

[0079] In this embodiment, the second preset humidity can be set according to the environment of the energy storage system of the first metal mesh 310 and the second metal mesh 320. Specifically, it can be set according to the season, geographical location, daytime temperature changes, nighttime temperature changes, etc. For example, the second preset humidity can be set differently in winter and summer, different during the day and night, different at high latitudes and low latitudes, and different at high altitudes and low altitudes. It is understood that the first metal mesh 310 and the second metal mesh 320 consume electrical energy when working. In practical applications, in order to reduce the electrical energy consumption of the first metal mesh 310 and the second metal mesh 320, achieve energy saving and emission reduction, and reduce the power consumption of the speaker module itself, the second preset humidity can be set so that the heat generated by the speaker assembly 100 can dry the remaining water stains on the first metal mesh 310 and the second metal mesh 320, or the remaining water stains on the first metal mesh 310 and the second metal mesh 320 can evaporate naturally and will not penetrate into the speaker module housing 200. Meanwhile, to prevent water stains from not evaporating in time and seeping into the speaker assembly 100, thus affecting the normal operation of the speaker assembly 100, the second preset humidity can also be the humidity that ensures the sound quality is not affected by water stains when the speaker assembly 100 is working. Alternatively, the second preset humidity can also be the humidity value that ensures that even if water stains continue to accumulate on the first metal mesh 310 and the second metal mesh 320 during the operation of the speaker assembly 100, the amount of water will not seep into the speaker assembly 100. The specific setting can be made according to actual needs. The electronic control component 500 detects the humidity of the first metal mesh fabric 310 and the second metal mesh fabric 320 in real time. During the heating process of the first metal mesh fabric 310 and the second metal mesh fabric 320, the water stains on the first metal mesh fabric 310 and the second metal mesh fabric 320 are reduced under the drying effect of the first metal mesh fabric 310 and the second metal mesh fabric 320. When the humidity of the first metal mesh fabric 310 and the second metal mesh fabric 320 drops from higher than or equal to the first preset humidity to less than or equal to the second preset humidity, the supply of electrical energy to the first metal mesh fabric 310 and the second metal mesh fabric 320 can be stopped, so that the first metal mesh fabric 310 and the second metal mesh fabric 320 stop heating.

[0080] Reference Figures 1 to 5 In a fourth manner, the switch 400 includes:

[0081] A humidity detection device 600 is disposed close to the first metal mesh fabric 310 and the second metal mesh fabric 320. The humidity detection device is used to detect the humidity of the first metal mesh fabric 310 and the second metal mesh fabric 320 and output a humidity detection signal.

[0082] A first temperature sensing device 600 is disposed close to the first metal mesh 310 and the second metal mesh 320. The temperature sensing device is used to detect the temperature of the first metal mesh 310 and the second metal mesh 320 and output a temperature detection signal.

[0083] The electronic control component 500 is connected to the humidity detection device and the first temperature detection device 600 respectively. The electronic control component 500 is also used to control the first metal mesh 310 and the second metal mesh 320 to work according to the humidity detection signal and the temperature detection signal, so as to heat / stop heating the first metal mesh 310 and the second metal mesh 320.

[0084] In this embodiment, the temperature detection device 600 can be implemented using a temperature sensor or a humidity-sensitive resistor. Specifically, the temperature sensor can be implemented using a MEMS chip. When the temperature detection device 600 is implemented using a humidity-sensitive resistor, a pull-up resistor can also be provided. The pull-up resistor is connected to the output terminal of a thermistor, and the other end of the thermistor is connected to a DC power supply. The thermistor and the pull-up resistor form a series voltage divider circuit. During operation, the temperature signal is converted into an electrical signal and output to the electronic control component 500. The thermistor can be implemented using a negative temperature coefficient thermistor or a positive temperature coefficient thermistor. When using a positive temperature coefficient thermistor...

[0085] The electronic control component 500 can determine whether to supply power to the metal mesh fabric and whether to stop supplying power based on the humidity detection signal. Specifically, the electronic control component 500 can compare the received humidity detection signal with a first preset humidity. When the humidity of the metal mesh fabric is greater than or equal to the first preset humidity, it supplies power to the metal mesh fabric to drive it to work, so that the metal mesh fabric converts electrical energy into heat energy, thereby drying the water stains on the metal mesh fabric.

[0086] During the process of supplying power to the metal mesh fabric based on the humidity detection signal, the electronic control component 500 can also determine whether to stop supplying power based on the temperature detection signal. Specifically, the electronic control component 500 can compare the received temperature detection signal with a preset temperature threshold. When the temperature of the metal mesh fabric reaches the first preset temperature threshold, it stops supplying power to the metal mesh fabric to drive it to stop working and complete the drying of water stains on the metal mesh fabric. When the temperature of the metal mesh fabric is lower than the first preset temperature threshold, it continues to supply power to the metal mesh fabric, and the metal mesh fabric stops heating. The preset temperature threshold can be set to 45°C, which can remain stable and will not cause burns even if a person touches it. Through simulation of heating and heat dissipation (thermal radiation and convection), it is known that a current of about 12-26mA is needed to reach thermal equilibrium, at which point the moisture on the metal mesh fabric will continuously evaporate. In a specific embodiment, the temperature detection device 600 is implemented using a thermistor, and specifically, the thermistor Rf is attached to the metal mesh fabric. The thermistor Rf is inversely proportional to the temperature of the metal mesh fabric; the higher the temperature, the lower the resistance value. A thermistor picks up the temperature of the metal mesh and transmits it to the electronic control component 500. Once the temperature exceeds a preset value of 45°C, the resistance value decreases, stopping the supply of electrical energy to the metal mesh and thus controlling the mesh to stop heating. This prevents the mesh from overheating and being damaged, or from excessive heat radiation damaging the speaker diaphragm. This invention uses a temperature detection device 600 to detect temperature and a humidity detection device to detect humidity, forming a closed-loop control system that accelerates moisture evaporation from the mesh while ensuring safe heating.

[0087] Reference Figures 1 to 5 In the fifth method, based on the first method, the switch 400 further includes: a second temperature detection device 700, which is disposed on the housing 200 and is located away from the first metal mesh 310 and the second metal mesh 320. The second temperature detection device 700 is used to detect the ambient temperature and output an ambient temperature detection signal.

[0088] The electronic control component 500 is also connected to the second temperature detection device 700. The electronic control component 500 is also used to provide or stop providing electrical energy to the first metal mesh 310 and the second metal mesh 320 according to the mesh temperature detection signal and the ambient temperature detection signal when providing electrical energy to the first metal mesh 310 and the second metal mesh 320; wherein, the second preset temperature is greater than the first preset temperature.

[0089] In this embodiment, the second temperature detection device 700 can be implemented using a temperature sensor or a humidity-sensitive resistor. Specifically, the temperature sensor can be implemented using a MEMS chip. When the second temperature detection device 700 is implemented using a humidity-sensitive resistor, a pull-up resistor can also be provided. The pull-up resistor is connected to the output terminal of a thermistor, and the other end of the thermistor is connected to a DC power supply. The thermistor and the pull-up resistor form a series voltage divider circuit. During operation, the temperature signal is converted into an electrical signal and output to the electronic control component 500. The thermistor can be implemented using a negative temperature coefficient thermistor or a positive temperature coefficient thermistor. When a positive temperature coefficient thermistor is used, the second temperature detection device 700 is used to detect the ambient temperature outside the speaker module housing 200. The electronic control component 500 can determine whether to provide power to the first metal mesh 310 and the second metal mesh 320, and whether to stop providing power, based on the temperature detection signal. Specifically, when the temperature difference between the first metal mesh fabric 310 and the second metal mesh fabric 320 and the ambient temperature is determined to be greater than a first preset difference based on the mesh fabric temperature detection signal and the ambient temperature detection signal, electrical energy is supplied to the first metal mesh fabric 310 and the second metal mesh fabric 320; when the temperature difference between the first metal mesh fabric 310 and the second metal mesh fabric 320 and the ambient temperature is determined to be less than the first preset difference based on the mesh fabric temperature detection signal and the ambient temperature detection signal, the supply of electrical energy to the first metal mesh fabric 310 and the second metal mesh fabric 320 is stopped.

[0090] In this embodiment, the difference between the detected ambient temperature and the mesh fabric temperature is calculated, and then the difference is used to determine whether to provide power to the first metal mesh fabric 310 and the second metal mesh fabric 320, and whether to stop providing power. When the mesh fabric temperature is higher than the ambient temperature and the difference between the two is greater than a first preset difference, it can be determined that the current environment of the speaker module is relatively humid and cold. At this time, the heating of the first metal mesh fabric 310 and the second metal mesh fabric 320 can be controlled. When the mesh fabric temperature is higher than the ambient temperature, but the difference between the two is less than the first preset difference, it can be determined that the current ambient temperature of the speaker module is relatively high. At this time, the heating of the first metal mesh fabric 310 and the second metal mesh fabric 320 can be stopped.

[0091] Reference Figures 1 to 5 The sixth method involves setting a third preset humidity based on the first method. The electronic control component 500 is also electrically connected to the speaker assembly 100. The electronic control component 500 is also used to stop supplying power to the speaker assembly 100 when the humidity of the first metal mesh 310 and the second metal mesh 320 reaches the third preset humidity. The third preset humidity is greater than the first preset humidity.

[0092] It is understandable that during typhoons, heavy rains, or prolonged periods of overcast and rainy weather, the metal mesh may not be able to prevent rainwater from seeping into the speaker module. To avoid water seepage inside the speaker module housing 200 and subsequent leakage or short circuits when the speaker assembly 100 continues to operate, this embodiment can stop supplying power to the speaker assembly 100 when the humidity of the metal mesh reaches a third preset humidity level. Simultaneously, a terminal device connected to the speaker module can be wirelessly transmitted to the user, informing them that the speaker assembly 100 needs to stop operating. This ensures electrical safety while enabling human-computer interaction. When the humidity of the first metal mesh 310 and the second metal mesh 320 is detected to be less than or equal to the first preset humidity, power is supplied to the speaker assembly 100, and then the power supply is restored to ensure electrical safety, allowing the speaker assembly 100 to quickly resume normal operation even in harsh environments.

[0093] Reference Figures 1 to 5 In one embodiment, the electronic control component 500 is also electrically connected to the speaker, and the electronic control component 500 is also used to provide power to the speaker assembly 100 when the humidity of the first metal mesh 310 and the second metal mesh 320 is detected to be less than or equal to the first preset humidity.

[0094] In this embodiment, to ensure electrical safety, during typhoons, heavy rains, or prolonged periods of overcast and rainy weather, the first metal mesh 310 and the second metal mesh 320 may not be able to prevent rainwater from seeping into the speaker module. To avoid leakage and short circuits when the speaker assembly 100 continues to operate with water seepage inside the speaker module housing 200, this embodiment can disconnect the power supply to the speaker assembly 100 when the humidity of the first metal mesh 310 and the second metal mesh 320 reaches a first preset humidity or a third preset humidity. Under the heating control of the main controller 510, the water stains on the first metal mesh 310 and the second metal mesh 320 will decrease, causing the humidity of the first metal mesh 310 and the second metal mesh 320 to drop. When the humidity is detected to be less than or equal to the first preset humidity, the power supply to the speaker assembly 100 is restored to ensure electrical safety, allowing the speaker assembly 100 to quickly resume normal operation in harsh environments.

[0095] Reference Figure 1 In one embodiment, the first metal mesh 310 and the second metal mesh 320 are fixedly connected to the housing 200 by screws / buckles;

[0096] Alternatively, the first metal mesh 310 and the second metal mesh 320 may also have riveting portions, and be riveted and fixed to the housing 200 by the riveting portions;

[0097] Alternatively, the first metal mesh 310 and the second metal mesh 320 are bonded to the housing 200.

[0098] In this embodiment, the first metal mesh 310 and the second metal mesh 320 can be bonded to the upper housing 210 via an adhesive layer 103 and a buffer layer. The first metal mesh 310 and the second metal mesh 320 can also be fixedly connected to the speaker assembly 100 via a buffer layer 101 and an adhesive layer 102. During speaker module assembly, after a buffer layer and an adhesive layer are placed between the first metal mesh 310 and the second metal mesh 320 and the housing 200, the thermally conductive and acoustically transparent mesh is fixed to the housing 200 via the adhesive layer, allowing the first metal mesh 310 and the second metal mesh 320 to directly contact the buffer layer and be fixed to the housing 200 by pressing. After placing the buffer layer 101 and the adhesive layer 102 between the first metal mesh 310 and the second metal mesh 320 and the speaker assembly 100, the speaker assembly 100 can be fixed to the housing 200 using screws, clips, etc. The buffer layer can be implemented using foam. Foam 101 can retain a certain amount of compression to prevent noise caused by vibrations generated during the operation of the speaker assembly 100 colliding with the housing 200. The first metal mesh 310 and the second metal mesh 320 are attached to the foam (not shown in the figure) and the housing 200 using double-sided adhesive 103. Because the foam 101 is compressed, the first metal mesh 310 and the second metal mesh 320 are also compressed, ensuring a secure assembly. The adhesive layers 102 and 103 are usually made of waterproof materials and have a width greater than 2mm, thus ensuring overall waterproofing.

[0099] Reference Figure 1 or Figure 2 In one embodiment, the speaker module further includes:

[0100] An insulating layer is applied to both sides of the first metal mesh 310 and the second metal mesh 320.

[0101] In this embodiment, the insulating layer can cover both sides of the first metal mesh 310 and the second metal mesh 320, or it can be set only on the side of the first metal mesh 310 and the second metal mesh 320 away from (away from) the speaker assembly 100. The insulating layer can be made of materials with certain waterproof properties, such as water-based paint, to prevent the first metal mesh 310 and the second metal mesh 320 from oxidizing and being corroded.

[0102] To further improve the heat dissipation capacity of the speaker module, the first metal mesh 310 and the second metal mesh 320 can be provided with heat-conducting extensions. These extensions can contact the speaker assembly 100, allowing heat from the speaker assembly 100 to be conducted to the first metal mesh 310 and the second metal mesh 320. The heat-conducting extensions of the first metal mesh 310 and the second metal mesh 320 can also contact components of the speaker assembly 100 that generate significant heat or have high thermal conductivity, thereby increasing the rate of heat transfer. The speaker assembly 100 includes a magnetic circuit system, which is a component in the speaker that generates a significant amount of heat and is typically made of metal, possessing strong thermal conductivity. The heat-conducting extensions of the first metal mesh 310 and the second metal mesh 320 can contact the bottom surface of the magnetic circuit system through the housing 200.

[0103] In some embodiments, a buffer layer may be provided between the first metal mesh 310 and the second metal mesh 320 and the speaker assembly 100. The buffer layer may specifically be foam, which is used to seal the speaker assembly 100 and also to buffer the sound wave pressure generated by the speaker assembly 100 on the first metal mesh 310 and the second metal mesh 320.

[0104] Reference Figure 1 or Figure 2 In one embodiment, the housing 200 has a speaker receiving cavity, the lower end of which near the sound outlet is inclined toward the speaker assembly 100;

[0105] And / or, the upper end of the speaker housing cavity near the sound outlet is inclined away from the speaker assembly 100.

[0106] In this embodiment, the housing 200 includes an upper end 210 and a lower end 220 of a speaker housing cavity. The upper end 210 forms a speaker housing cavity, and the sound outlet is formed at one end edge of both the upper end 210 and the lower end 220. Setting the housing 200 as a split structure facilitates its manufacturing. Both the upper end 210 and the lower end 220 of the speaker housing cavity can be made of plastic, and they can be connected by snap-fit ​​connections, or by snap-fit ​​connections or threaded connections. This structure also facilitates the assembly of the speaker 100. During assembly, the speaker assembly 100 can be installed in the speaker housing cavity, and then the heat-conducting and sound-permeable mesh can be encapsulated on the sound outlet, improving assembly efficiency. The lower end 220 of the speaker housing is inclined at a certain angle to the horizontal plane, forming a water-guiding structure. This allows water droplets from the first metal mesh 310 and the second metal mesh 320 to flow into the lower end 220 of the speaker housing under gravity. The inclined surface of the lower end 220 accelerates the discharge of the water, preventing water from accumulating in the lower end 220 of the speaker housing or even penetrating into the housing 200. In this embodiment, the upper end 210 of the speaker housing is also inclined at a certain angle to the horizontal plane, forming a rainproof structure. This allows rain entering the speaker module to flow along the rainproof structure to the speaker module, reducing water accumulation on the heat-conducting and sound-permeable mesh.

[0107] The present invention also proposes an outdoor fixed audio device, including the speaker module as described above. The detailed structure of the speaker module can be referred to the above embodiments, and will not be repeated here. It is understood that, since the above-described speaker module is used in the outdoor fixed audio device of the present invention, the embodiments of the outdoor fixed audio device of the present invention include all the technical solutions of all the embodiments of the above-described speaker module, and the achieved technical effects are also completely the same, and will not be repeated here.

[0108] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A speaker module, characterized in that, The speaker module includes: Speaker assembly; The housing has a speaker housing cavity and a sound outlet communicating with the speaker housing cavity, and the speaker assembly is fixed inside the speaker housing cavity; The first and second metal mesh fabrics are made of materials with high thermal conductivity. The first and second metal mesh fabrics cover the sound outlet. One end of the first and second metal mesh fabrics is electrically connected, and the other end of the first and second metal mesh fabrics is respectively connected to electrical energy with opposite phases. During the process of power flowing through the first metal mesh and the second metal mesh, the current flowing through the first metal mesh and the second metal mesh forms a differential signal, and the electromagnetic radiation generated by the first metal mesh and the second metal mesh cancels each other out.

2. The speaker module as described in claim 1, characterized in that, The first metal mesh fabric includes a first metal mesh fabric body and a first conductive portion protruding from both ends of the first metal mesh fabric body; The first metal mesh fabric includes a second metal mesh fabric body and a second conductive portion protruding from both ends of the second metal mesh fabric body; wherein the first conductive portion and the second conductive portion located at one end are electrically connected. The first conductive part and the second conductive part located at the other end are respectively connected to electrical energy with opposite phases.

3. The speaker module as described in claim 2, characterized in that, The first metal mesh body and the second metal mesh body are insulated from each other.

4. The speaker module as described in claim 1, characterized in that, The speaker module also includes: An electronic control component is electrically connected to the first metal mesh fabric and the second metal mesh fabric respectively. The electronic control component is used to detect the humidity of the first metal mesh fabric and the second metal mesh fabric, and when the humidity of the first metal mesh fabric and / or the second metal mesh fabric reaches a first preset humidity, it provides electrical energy with opposite phase to the first metal mesh fabric and the second metal mesh fabric respectively, so as to control the first metal mesh fabric and the second metal mesh fabric to convert electrical energy into heat energy.

5. The speaker module as described in claim 4, characterized in that, The electronic control component is further configured to stop supplying electrical energy to the first metal mesh and the second metal mesh when the humidity of the first metal mesh and / or the second metal mesh is less than or equal to a second preset humidity; wherein the first preset humidity is greater than the second preset humidity.

6. The speaker module as described in claim 1, characterized in that, The speaker module also includes: A first temperature sensing device is disposed close to the first metal mesh and / or the second metal mesh, the temperature sensing device being used to detect the temperature of the first metal mesh and the second metal mesh and output a temperature detection signal; An electronic control component is connected to the first temperature detection device. The electronic control component is also used to provide or stop providing electrical energy to the first and second metal mesh fabrics according to the temperature detection signal of the mesh fabric when providing electrical energy to the first and second metal mesh fabrics.

7. The speaker module as described in any one of claims 1 to 6, characterized in that, The first and second metal mesh fabrics are fixedly connected to the housing by screws / buckles; Alternatively, the first metal mesh and the second metal mesh may also have riveting portions, and be riveted and fixed to the housing by the riveting portions; Alternatively, the first metal mesh and the second metal mesh are bonded to the housing.

8. The speaker module as described in any one of claims 1 to 6, characterized in that, The speaker module also includes; An insulating layer is applied to both sides of the first and second metal mesh fabrics.

9. The speaker module as described in any one of claims 1 to 6, characterized in that, The housing has a speaker housing cavity, and the lower end of the speaker housing cavity near the sound outlet is inclined toward the speaker assembly; And / or, the upper end of the speaker housing cavity near the sound outlet is inclined away from the speaker assembly.

10. An outdoor fixed audio device, characterized in that, Includes the speaker module as described in any one of claims 1-9.

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