Speaker modules and outdoor fixed audio equipment

Abstract

The present invention discloses a speaker module and an outdoor fixed audio device, the speaker module comprises: a speaker assembly; a housing, the housing is provided with a speaker accommodating cavity and a sound outlet communicated with the speaker accommodating cavity, the speaker assembly is fixed in the speaker accommodating cavity; a metal mesh cloth, the metal mesh cloth covers the sound outlet; an electric control assembly, electrically connected to the metal mesh cloth, the electric control assembly is used to detect the humidity of the metal mesh cloth, and when it is detected that the humidity of the metal mesh cloth reaches a first preset humidity, the electric control assembly is used to provide electric energy to the metal mesh cloth to control the metal mesh cloth to convert the electric energy into heat energy. The present invention solves the problem that the water stains left on the metal mesh cloth hinder the sound of the speaker, and the speaker fails.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeakers, and in particular to a loudspeaker module and an outdoor fixed audio device. Background Art

[0002] When the speaker module is used in a fixed audio device installed outdoors, it is easy for water stains to remain on the speaker mesh in rainy or humid environments, which will hinder the sound of the speaker, especially the high-frequency suppression is more serious, resulting in low sound or noise; even residual water stains on the speaker diaphragm will damage the diaphragm glue over time, causing the speaker to fail. For this reason, the current method of adding a waterproof shell or waterproof cover to solve this problem is usually to increase the difficulty of designing the shell of the speaker module, and it will also affect the sound effect of the speaker. At the same time, once water stains enter the waterproof shell or waterproof cover, it cannot be actively drained. Summary of the invention

[0003] The main purpose of the present invention is to provide a speaker module and an outdoor fixed audio device, aiming to solve the problem that water stains remaining on the metal mesh hinder the sound of the speaker and cause the speaker to fail.

[0004] To achieve the above object, the present invention provides a speaker module, the speaker module comprising:

[0005] Speaker assembly;

[0006] A housing, wherein the housing is provided with a speaker accommodating cavity and a sound outlet communicated with the speaker accommodating cavity, and the speaker assembly is fixed in the speaker accommodating cavity;

[0007] A metal mesh cloth, the metal mesh cloth covering the sound outlet;

[0008] An electric control component is electrically connected to the metal mesh cloth, and is used to detect the humidity of the metal mesh cloth, and when it is detected that the humidity of the metal mesh cloth reaches a first preset humidity, the electric control component provides electric energy to the metal mesh cloth to control the metal mesh cloth to convert the electric energy into heat energy.

[0009] Optionally, the electric control component is further used to stop supplying electric energy to the metal mesh when the humidity of the metal mesh reaches a second preset humidity; wherein the first preset humidity is greater than the second preset humidity.

[0010] Optionally, the electric control component is further used to adjust the power value of the electric energy provided to the metal mesh cloth according to the detected humidity of the metal mesh cloth when the humidity of the metal mesh cloth is between the first preset humidity and the second preset humidity.

[0011] Optionally, the speaker module further includes:

[0012] A first temperature detection device is disposed close to the metal mesh, and is used to detect the temperature of the metal mesh and output a temperature detection signal;

[0013] The electric control component is also connected to the first temperature detection device, and is also used to provide / stop providing electric energy to the metal mesh when providing electric energy to the metal mesh according to the mesh temperature detection signal.

[0014] Optionally, the electronic control component is specifically used for:

[0015] When it is determined according to the mesh temperature detection signal that the metal mesh temperature is lower than a first preset temperature, maintaining the supply of electric energy to the metal mesh;

[0016] When it is determined according to the mesh temperature detection signal that the metal mesh temperature is greater than a second preset temperature, supplying electric energy to the metal mesh is stopped; wherein the second preset temperature is greater than the first preset temperature.

[0017] Optionally, the speaker module further includes:

[0018] A second temperature detection device is disposed on the housing and away from the metal mesh, and is used to detect the ambient temperature and output an ambient temperature detection signal;

[0019] The electric control component is also connected to the second temperature detection device, and is also used to provide / stop providing electric energy to the metal mesh when providing electric energy to the metal mesh according to the mesh temperature detection signal and the ambient temperature detection signal.

[0020] Optionally, the electronic control component is specifically used for:

[0021] When it is determined according to the mesh temperature detection signal and the ambient temperature detection signal that the difference between the temperature of the metal mesh and the ambient temperature is greater than a first preset difference, supplying electric energy to the metal mesh;

[0022] When it is determined according to the mesh temperature detection signal and the ambient temperature detection signal that the difference between the temperature of the metal mesh and the ambient temperature is less than a first preset difference, supplying electric energy to the metal mesh is stopped.

[0023] Optionally, the electronic control component is also electrically connected to the speaker component, and is also used to stop supplying power to the speaker component when it is detected that the humidity of the metal mesh reaches a third preset humidity; wherein the third preset humidity is greater than the first preset humidity.

[0024] Optionally, the electric control component is also electrically connected to the speaker component, and the electric control component is further used to provide electrical energy to the speaker component when it is detected that the humidity of the metal mesh is less than or equal to the first preset humidity.

[0025] Optionally, the speaker module further includes:

[0026] At least one insulating layer is disposed on a side of the metal mesh cloth facing away from the speaker assembly.

[0027] Optionally, the housing has a speaker accommodating cavity, and an end portion of the lower end of the speaker accommodating cavity close to the sound outlet is inclined toward the speaker assembly;

[0028] And / or, an end portion of the upper end of the speaker accommodating cavity close to the sound outlet is inclined away from the speaker assembly.

[0029] The present invention also provides an outdoor fixed audio device, comprising the speaker module as described above.

[0030] The speaker module of the present invention is provided with a speaker assembly, a shell and a metal mesh cloth, and a speaker accommodating cavity and a sound outlet connected to the speaker accommodating cavity are provided in the shell, so that the speaker assembly is fixed in the speaker accommodating cavity; and the metal mesh cloth is covered on the sound outlet. The metal mesh cloth of the present invention is made of a material with high thermal conductivity. Through the reuse of the metal mesh cloth, the heat dissipation rate of the speaker assembly can be improved, and the evaporation rate of the water stains can be improved when there are water stains remaining on the metal mesh cloth. The present invention is also provided with an electric control component that can compare the received humidity detection signal with the preset humidity threshold (first preset humidity). When the humidity of the metal mesh cloth reaches the first preset humidity, electric energy is provided to the metal mesh cloth to drive the metal mesh cloth to work, so that the metal mesh cloth converts the electric energy into heat energy, thereby drying the water stains on the metal mesh cloth. The present invention solves the problem that the residual water stains on the metal mesh cloth hinder the sound of the speaker, especially the high-frequency suppression is more serious, resulting in low sound or noise, and even residual water stains on the speaker diaphragm, which will damage the diaphragm glue over time and cause the speaker to fail. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 It is a structural schematic diagram of an embodiment of the electric control assembly of the present invention applied to a speaker module;

[0033] Figure 2 It is a structural schematic diagram of an embodiment of a speaker module of the present invention;

[0034] Figure 3 A schematic diagram of the circuit structure of an embodiment of an electric control component of the present invention;

[0035] Figure 4 for Figure 3 A schematic diagram of the circuit structure of an embodiment of the main controller.

[0036] Description of Figure Numbers:

[0037] Label name Label name 100 Speaker Components 500 Electronic control components 200 case 510 Main Controller 210 Upper shell 520 Drive 220 Lower shell 600 Temperature sensing device 300 Thermally conductive acoustically transparent mesh 700 Second temperature detection device 400 Humidity detection device

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] The invention provides a speaker module.

[0044] The speaker module is suitable for outdoor fixed audio equipment, which can be a camera, outdoor speaker, smart doorbell, etc. With the gradual development of outdoor fixed audio equipment, people have higher and higher requirements for the sound quality of speaker modules. The speaker module usually adds a mesh with a relatively high mesh count to the speaker outlet. Since the mesh opening is relatively small, the hole spacing is also relatively small. When the speaker module is used in outdoor fixed audio equipment set up outdoors, it is easy for water stains to remain on the mesh in rainy or humid environments, which will hinder the sound of the speaker, especially the high-frequency suppression is more serious, resulting in low sound or noise; even residual water stains on the speaker diaphragm will damage the diaphragm glue over time, causing the speaker to fail.

[0045] Reference Figures 1 to 4 In order to solve the above problem, in one embodiment of the present invention, the speaker module includes:

[0046] Speaker assembly 100;

[0047] A housing 200, wherein the housing 200 is provided with a speaker accommodating cavity and a sound outlet communicated with the speaker accommodating cavity, and the speaker assembly 100 is fixed in the speaker accommodating cavity;

[0048] A metal mesh cloth 300, the metal mesh cloth 300 covers the sound outlet;

[0049] The electric control component 500 is electrically connected to the metal mesh cloth 300. The electric control component 500 is used to detect the humidity of the metal mesh cloth 300 and provide electric energy to the metal mesh cloth 300 when it is detected that the humidity of the metal mesh cloth 300 reaches a first preset humidity, so as to control the metal mesh cloth 300 to convert the electric energy into heat energy.

[0050] In this embodiment, the shape and size of the housing 200 can be designed according to the size and frequency (treble, midrange, bass) of the speaker assembly 100. The material of the housing 200 can be made of plastic (plastic can be hard plastic, such as ABS, POM, PS, PMMA, PC, PET, PBT, PPO, etc.) and other materials with waterproof properties. In this way, it is more conducive to improving the setting stability of the housing 200, thereby effectively improving the practicality, reliability, and durability of the housing 200. The speaker assembly 100 is an air conduction speaker. The sound device assembly includes a vibration system and a magnetic circuit system, wherein the vibration system includes a diaphragm and a voice coil that drives the diaphragm to vibrate, and the voice coil is connected to the diaphragm; the magnetic circuit system includes a basin frame and a magnetic component installed on the basin frame. The magnetic component can be a magnet, which can be a permanent magnet. The magnetic component can be made of natural magnets or artificial magnetic steel. When the sound device 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 to achieve the transmission of the sound signal. Wherein, the basin frame is made of magnetic conductive material, usually iron-based material.

[0051] The speaker assembly 100 and the housing 200 can be fixed by screws, that is, the connection between the two is threaded connection. The periphery of the speaker assembly 100 is provided with connection holes, and the housing 200 is provided with threaded holes at the periphery positions corresponding to the speaker assembly 100. The stable installation structure of the speaker assembly 100 can be realized by screwing through the connection holes and the threaded holes. When the speaker assembly 100 is installed in the housing 200, the speaker accommodating 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 and the metal mesh 300 can form the front sound cavity of the speaker module, and the closed space formed by the speaker assembly 100 and the housing 200 is the rear sound cavity of the speaker module.

[0052] The metal mesh 300 can prevent external objects from piercing the diaphragm in the speaker assembly 100, and can also play a waterproof role for a certain period of time. The more meshes the metal mesh 300 has, the stronger its waterproof effect is. The metal mesh 300 can also be used for dust prevention, tuning, etc. Among them, the material of the metal mesh 300 can be stainless steel material, aluminum material, aluminum alloy material, copper material, copper alloy material, iron material, iron alloy material, silver material and silver alloy, etc. Of course, in other embodiments, other metal materials or alloy materials thereof can also be used to achieve this, which is not limited here.

[0053] It should be noted that the speaker will generate a certain amount of heat during operation. Due to the small size of the speaker module and the complex internal structure, there is often a problem of poor heat dissipation. The high temperature generated by the speaker during operation can easily affect the diaphragm, magnetic circuit system and other components, causing changes in the elasticity of the diaphragm and demagnetization of the magnetic circuit system, which seriously affects the sound performance of the speaker.

[0054] To this end, the present invention utilizes the sound waves generated by the speaker assembly 100 to be mainly transmitted from the front sound cavity, and the vibration of the diaphragm and the transmission of the sound waves cause the air in the front sound cavity to flow, so that there is air flow between the front sound cavity and the external space. The heat generated by the speaker assembly 100 when working can be transferred to the metal mesh cloth 300 located in the front sound cavity under the radiation of the diaphragm. Thus, through the form of heat radiation and under the action of air flow, the heat dissipation rate of the speaker assembly 100 can be improved, and the heat can be more efficiently conducted to the external space. In addition, under the heat conduction effect of the metal mesh cloth 300, the use of other heat dissipation devices can be saved, and the volume caused by the heat dissipation devices can be reduced. Or when other heat dissipation devices (for example, other heat dissipation devices can be installed in the rear sound cavity of the speaker assembly 100) are simultaneously dissipating heat to the speaker assembly 100, the heat dissipation points of the speaker assembly 100 can be increased, and the heat dissipation rate of the speaker assembly 100 can be further improved.

[0055] When the heat generated by the speaker assembly 100 is radiated to the metal mesh cloth 300, the temperature of the metal mesh cloth 300 will be higher than the ambient temperature. At this time, if there are water stains remaining on the metal mesh cloth 300, the heat generated by the speaker assembly 100 can accelerate the evaporation rate of the water stains remaining on the metal mesh cloth 300, so that the water stains on the metal mesh cloth 300 and between the metal mesh cloth 300 and the diaphragm evaporate quickly, ensuring that the metal mesh cloth 300 and the speaker assembly 100 maintain a dry environment.

[0056] In some embodiments, the speaker assembly 100 may also be provided with a controllable heat source, and the controllable heat source may actively heat the heat-conductive sound-transmitting mesh 300 when water stains remain on the heat-conductive sound-transmitting mesh 300 .

[0057] The metal mesh 300 of the present invention is made of a material with high thermal conductivity. By reusing the metal mesh 300, the heat dissipation rate of the speaker assembly 100 can be improved. At the same time, water stains can be left on the metal mesh 300 to increase the evaporation rate of the water stains. This will hinder the sound of the speaker, especially severely suppress high frequencies, resulting in low sound or noise; even residual water stains on the speaker diaphragm will damage the diaphragm glue over time, causing the speaker to fail.

[0058] The electric control component 500 can compare the received humidity detection signal with the preset humidity threshold (first preset humidity). When the humidity of the metal mesh 300 reaches the first preset humidity, the metal mesh 300 is provided with electric energy to drive the metal mesh 300 to work, so that the metal mesh 300 converts the electric energy into heat energy, thereby drying the water stains on the metal mesh 300. When the humidity of the metal mesh 300 is less than the first preset humidity, the metal mesh 300 is stopped from being provided with electric energy, and the metal mesh 300 stops being heated. Among them, the first preset humidity can be set according to the environment, geographical location, daytime temperature change, nighttime temperature change, etc. of the application of the speaker module. For example, when it is applied to an environment with sufficient rain, long-term damp and cold, the first preset humidity can be set to a lower level. When it is applied to an environment with less rain and higher temperature, the first preset humidity can be set to a higher level. The preset temperature can also be adjusted according to the season of use. For example, in summer and autumn, when there is less rain and higher temperature, the first preset humidity can be set to a higher level. In spring and winter, when there is more rain and lower temperature, the first preset humidity can be set to a lower level. In addition, the temperature may be set differently during the day and at night, and may be set differently at higher latitudes and lower latitudes, and may be set differently at higher altitudes and lower altitudes. The preset temperature of this embodiment may also be adjusted according to the actual application environment of the user, so as to adapt to different environments and set different preset temperatures. In some embodiments, the first preset humidity may also be set such that the heat generated by the speaker assembly 100 is not enough to heat and dry the water stains on the metal mesh 300, that is, the heat generated by the speaker assembly 100 at this time can dry some of the water stains, but it cannot ensure that the metal mesh 300 remains dry in a short time.

[0059] The electronic control component 500 includes but is not limited to:

[0060] Electric control panel (not shown);

[0061] A switch 400 is provided on the speaker module, and when the switch 400 is triggered, it outputs a heating / stop heating trigger signal;

[0062] A main controller 510, connected to the switch 400, for generating and outputting a corresponding control signal according to the heating / stop heating trigger signal;

[0063] The heating driver 520 is electrically connected to the main controller 510 , and the heating driver 520 provides power to the metal mesh cloth 300 or stops providing power according to the control signal.

[0064] In this embodiment, the electronic control board can serve as a carrier of the circuit function of the speaker module and is arranged in the shell 200 of the speaker module. When the speaker module is applied to a camera or a smart doorbell, it can also be arranged in the shell 200 of the camera, the smart doorbell, etc.

[0065] First method

[0066] The switch 400 includes a humidity detection device, which is used to detect the humidity of the metal mesh and output a humidity detection signal.

[0067] The electric control component 500 can control whether the metal mesh cloth is working according to the relationship between the humidity detection signal and the first preset humidity.

[0068] The humidity detection device can be a humidity sensor, a heating control switch or other device for detecting humidity. When the switch 400 is implemented by a humidity sensor, the humidity sensor detects the humidity of the metal mesh and outputs a humidity detection signal, i.e., a heating / stop heating trigger signal. The humidity sensor can be arranged close to the heat-conductive and sound-permeable mesh 300, or the humidity sensor can also be arranged on the housing 100 of the speaker module, such as the inner wall and / or the outer wall of the housing 100. The humidity sensor can be implemented by a MEMS chip. The switch 400 can also be implemented by a humidity-sensitive resistor. When the switch 400 is implemented by a humidity-sensitive resistor, a pull-up resistor can also be provided. The pull-up resistor is connected to the output end 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. When working, 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 the humidity, in order to improve the detection accuracy, the electric control component 500 may also include a signal processing circuit for filtering and amplifying the electric signal, and then compare the filtered and amplified electric signal with a preset threshold. The electric control component 500 may compare the received humidity detection signal with the first preset humidity, and the electric control component 500 may determine whether it is necessary to provide electric energy to the metal mesh 300 according to the humidity detection signal. The main controller 510 may be implemented by an amplifier, or by a microprocessor such as a single-chip microcomputer or a DSP. When an amplifier is used, the positive input terminal of the amplifier may be connected to a reference voltage and used to characterize the first preset humidity, and the negative input terminal of the amplifier is connected to the output terminal of the humidity detection device 400. When the humidity of the metal mesh 300 detected is greater than or equal to the first preset humidity, the amplifier outputs a high-level control signal to control the metal mesh 300 to heat, and when the humidity of the metal mesh 300 detected is less than the first preset humidity, the amplifier outputs a low-level control signal to control the metal mesh 300 to stop heating. The amplifier can be realized by a negative feedback proportional amplifier circuit, with Vin as input voltage, Vo as output voltage, and amplification factor A=Vo / Vin=-Rf / Rin.

[0069] When a microprocessor is used for implementation, a person skilled in the art can realize the control of the heating control of the metal mesh 300 by integrating some hardware circuits and software programs in the microprocessor. That is, in the microprocessor, a device can be integrated to analyze and compare the humidity of the metal mesh 300 with the first preset humidity, and then control the heating / stopping of the metal mesh 300 according to the comparison result. Among them, the heating driver 520 can be a switching device, such as a MOS tube, an IGBT, etc. The heating driver 520 can work or stop working according to the high / low level control signal output by the main controller 510. For example, when the main controller 510 determines that the humidity of the metal mesh 300 is less than the first preset humidity according to the humidity detection signal, a low level of "0" is output to turn off the driver. At this time, there is no power output and the metal mesh 300 is not heated; when the main controller 510 determines that the humidity of the metal mesh 300 is greater than the first preset humidity according to the humidity detection signal, a high level of "1" is output to turn on the driver and provide power to the metal mesh 300 for heating.

[0070] In another embodiment, when controlling the metal mesh 300 to heat, the electric control component 500 can also calculate the heating current and heating time required for the metal mesh 300 according to the working state and working time of the speaker assembly 100. That is, in the process of controlling the heating of the metal mesh 300, the power of the metal mesh 300 can be adjusted in real time according to the working state of the speaker module, so as to achieve rapid heating of the metal mesh 300 and reduce the power consumption caused by the heating of the metal mesh 300, thereby achieving energy saving and emission reduction.

[0071] The speaker module of the present invention is provided with a speaker assembly 100, a housing 200 and a metal mesh 300, and a speaker accommodating cavity and a sound outlet connected to the speaker accommodating cavity are provided in the housing 200, so that the speaker assembly 100 is fixed in the speaker accommodating cavity; and the metal mesh 300 is covered on the sound outlet. The metal mesh 300 of the present invention is made of a material with high thermal conductivity. By reusing the metal mesh 300, the heat dissipation rate of the speaker assembly 100 can be improved, and the evaporation rate of the water stains can be improved when there are water stains on the metal mesh 300. The present invention is also provided with an electric control component 500, which can compare the received humidity detection signal with the preset humidity threshold (first preset humidity). When the humidity of the metal mesh 300 reaches the first preset humidity, the metal mesh 300 is provided with electric energy to drive the metal mesh 300 to work, so that the metal mesh 300 converts the electric energy into heat energy, thereby drying the water stains on the metal mesh 300. The present invention solves the problem that the residual water stains on the metal mesh 300 hinder the sound of the speaker, especially the high-frequency suppression is more serious, resulting in low sound or noise, and even residual water stains on the speaker diaphragm, which will damage the diaphragm glue over time and cause the speaker to fail. 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 can be triggered by the user, it outputs a heating trigger signal, or outputs a stop heating trigger signal. The humidity controller can output corresponding heating / stop heating trigger signals according to different humidity.

[0072] Second method

[0073] On the basis of the first method, a second preset humidity is set, and the electrical control component 500 is also used to stop supplying electrical energy to the metal mesh when the humidity of the metal mesh is greater than or equal to the first preset humidity and less than or equal to the second preset humidity; wherein the first preset humidity is greater than the second preset humidity.

[0074] In this embodiment, the second preset humidity can be set according to the environment in which the metal mesh cloth 300 energy storage system is located, and can be set according to the season, geographical location, daytime temperature change, nighttime temperature change, etc. For example, the second preset humidity can be set differently in winter and summer, and can also be set differently during the day and at night, and can also be set differently in places with higher latitudes and places with lower latitudes, and can also be set differently in places with higher altitudes and places with lower altitudes. It can be understood that the metal mesh cloth 300 consumes electrical energy when working. In practical applications, in order to reduce the power consumption of the metal mesh cloth 300, achieve energy conservation 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 metal mesh cloth 300, or the remaining water stains on the metal mesh cloth 300 can evaporate naturally and will not penetrate into the speaker module housing 200. At the same time, in order to prevent the water stains from evaporating in time and penetrating into the speaker assembly 100, thus affecting the normal operation of the speaker assembly 100, the second preset humidity can also be a humidity that ensures that the sound quality of the speaker assembly 100 will not be affected by the water stains when the speaker assembly 100 is working, or the second preset humidity can also be a humidity value that ensures that during the operation of the speaker assembly 100, even if the water stains continue to accumulate on the metal mesh cloth 300, the water will not penetrate into the speaker assembly 100. The specific humidity can be set according to actual needs. The electric control component 500 detects the humidity of the metal mesh cloth 300 in real time. In the process of controlling the heating of the metal mesh cloth 300, the water stains on the metal mesh cloth 300 are reduced under the drying effect of the metal mesh cloth 300, so that when the humidity of the metal mesh cloth 300 drops from higher than or equal to the first preset humidity to less than or equal to the second preset humidity, the supply of electric energy to the metal mesh cloth 300 can be stopped, so that the heating of the metal mesh cloth 300 is stopped.

[0075] Reference Figures 1 to 4 In the third mode, based on the second mode, when the humidity of the metal mesh is between the first preset humidity and the second preset humidity, the electric control component 500 controls the metal mesh to be dynamically heated:

[0076] It should be noted that the decrease in the humidity of the metal mesh may be nonlinear, and the humidity control of the metal mesh has a certain hysteresis. For example, when providing electric energy to the metal mesh, if the current humidity of the metal mesh drops to less than or equal to the second preset humidity, the metal mesh is controlled to stop working. At this time, the temperature of the metal mesh will not drop suddenly, and the metal mesh will still have residual temperature, causing the temperature of the metal mesh to continue to rise. Similarly, after the heating is stopped, when the metal mesh accumulates water stains due to the influence of the ambient humidity, if the metal mesh is controlled to start working when the humidity of the metal mesh rises to greater than or equal to the first preset humidity, the temperature of the metal mesh will not rise suddenly, and the metal mesh needs a certain amount of time to preheat in order to dry the water stains. Therefore, the humidity of the metal mesh will continue to rise, resulting in the actual humidity of the metal mesh being higher than the first preset humidity.

[0077] In order to prevent the humidity of the metal mesh cloth 300 from continuously decreasing or the humidity of the metal mesh cloth 300 from continuously increasing, the electric control component 500 of the present embodiment is also used to adjust the power value of the electric energy provided to the metal mesh cloth 300 according to the detected humidity of the metal mesh cloth 300 when the humidity of the metal mesh cloth 300 is between the first preset humidity and the second preset humidity.

[0078] Specifically, when the humidity of the metal mesh 300 is between the first preset humidity and the second preset humidity, the power value of the metal mesh 300 can be adjusted from large to small, that is, when it is close to the first preset humidity, the metal mesh 300 is controlled to be heated with a larger current, thereby increasing the power of the metal mesh 300, so that the humidity of the metal mesh 300 can quickly reach a better temperature suitable for charging. When it is close to the second preset humidity, the metal mesh 300 can be controlled to be heated with a smaller power value, thereby reducing the power of the metal mesh 300, so that the battery reaches the second preset humidity at a slow speed. Of course, in other embodiments, the intermittent heating of the metal mesh 300 can also be controlled. For example, when the humidity of the metal mesh 300 is between the first preset humidity and the second preset humidity, the metal mesh 300 is controlled to heat for a certain time, and then stop heating for a certain time, and so on repeatedly, and the heating time and the time to stop heating are adjusted in real time according to the humidity of the metal mesh 300, so as to ensure that the water stains on the metal mesh 300 can be dried, while reducing the power consumption of the speaker module.

[0079] Reference Figures 1 to 4 In a fourth embodiment, the switch 400 comprises:

[0080] A humidity detection device is disposed near the heat-conductive sound-transmitting mesh, and is used to detect the humidity of the heat-conductive sound-transmitting mesh and output a humidity detection signal;

[0081] A first temperature detection device 600 is disposed close to the metal mesh 300, and is used to detect the temperature of the metal mesh 300 and output a temperature detection signal;

[0082] The electric control component 500 is connected to the humidity detection device and the first temperature detection device 600 respectively. The electric control component 500 is also used to control the operation of the metal mesh according to the humidity detection signal and the temperature detection signal to heat / stop heating the heat-conductive and sound-transmitting mesh 300.

[0083] In this embodiment, the temperature detection device 600 can be implemented by a temperature sensor or a humidity-sensitive resistor. The temperature sensor can be implemented by a MEMS chip. When the temperature detection device 600 is implemented by a humidity-sensitive resistor, a pull-up resistor can also be provided. The pull-up resistor is connected to the output end of the thermistor. 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. When working, the temperature signal is converted into an electrical signal and then output to the electronic control component 500. The thermistor can be implemented by a negative temperature coefficient thermistor, or by a positive temperature coefficient thermistor. When a positive temperature coefficient thermistor is used.

[0084] The electric control component 500 can determine whether it is necessary to provide electric energy to the metal mesh cloth and whether it is necessary to stop providing electric energy according to the humidity detection signal. Specifically, the electric control component 500 can compare the received humidity detection signal with the first preset humidity, and when the humidity of the metal mesh cloth is greater than or equal to the first preset humidity, it provides electric energy to the metal mesh cloth to drive the metal mesh cloth to work, so that the metal mesh cloth converts the electric energy into heat energy, thereby drying the water stains on the metal mesh cloth.

[0085] In the process of providing electric energy to the metal mesh according to the humidity detection signal, the electric control component 500 can also determine whether to stop providing electric energy according to the temperature detection signal. Specifically, the electric control component 500 can compare the received temperature detection signal with the preset temperature threshold. When the temperature of the metal mesh reaches the first preset temperature threshold, the electric control component 500 stops providing electric energy to the metal mesh to drive the metal mesh to stop working and complete the drying of water stains on the metal mesh. When the temperature of the metal mesh is less than the first preset temperature threshold, the electric energy continues to be provided to the metal mesh, and the metal mesh stops heating. Among them, the preset temperature threshold can be set to 45°C, which can be kept stable, and the human hand will not be burned even if it touches it. Through simulation of heating and heat dissipation (thermal radiation and convection), it can be known that the current needs about 12 to 26 mA to reach a thermal equilibrium state, and the moisture on the metal mesh will continue to evaporate. In a specific embodiment, the temperature detection device 600 is implemented by a thermistor, and the thermistor Rf is specifically attached to the metal mesh. The thermistor Rf is inversely proportional to the temperature of the metal mesh. The higher the temperature, the lower the resistance value. The temperature of the metal mesh is picked up by the thermistor and transmitted to the electronic control component 500. Once the temperature exceeds the preset value of 45°, the resistance value will be reduced. At this time, the power supply to the metal mesh can be stopped, thereby controlling the metal mesh to stop heating, so as to prevent the mesh from being damaged by overheating, or high heat radiation from damaging the speaker diaphragm. The present invention forms a closed-loop control system by detecting temperature through the temperature detection device 600 and humidity detection device to detect humidity, which can accelerate the evaporation of water on the mesh and ensure safe heating of the mesh.

[0086] Reference Figures 1 to 4 In a fifth mode, based on the first mode, the switch 400 further includes: a second temperature detection device 700, which is disposed on the housing 200 and is away from the metal mesh 300, and the second temperature detection device 700 is used to detect the ambient temperature and output an ambient temperature detection signal;

[0087] The electric control component 500 is also connected to the second temperature detection device 700. The electric control component 500 is also used to provide / stop providing electric energy to the metal mesh cloth 300 according to the mesh cloth temperature detection signal and the ambient temperature detection signal when providing electric energy to the metal mesh cloth 300; wherein the second preset temperature is greater than the first preset temperature.

[0088] In this embodiment, the second temperature detection device 700 can be implemented by a temperature sensor or a humidity-sensitive resistor. The temperature sensor can be implemented by a MEMS chip. When the second temperature detection device 700 is implemented by a humidity-sensitive resistor, a pull-up resistor can also be provided. The pull-up resistor is connected to the output end of the thermistor. 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. When working, the temperature signal is converted into an electrical signal and then output to the electronic control component 500. Among them, the thermistor can be implemented by a negative temperature coefficient thermistor, or by a positive temperature coefficient thermistor. When a positive temperature coefficient thermistor is used to implement it. 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 it is necessary to provide electrical energy to the metal mesh 300 and whether it is necessary to stop providing electrical energy based on the temperature detection signal. Specifically, when it is determined according to the mesh temperature detection signal and the ambient temperature detection signal that the difference between the temperature of the metal mesh cloth 300 and the ambient temperature is greater than a first preset difference, electric energy is supplied to the metal mesh cloth 300; when it is determined according to the mesh temperature detection signal and the ambient temperature detection signal that the difference between the temperature of the metal mesh cloth 300 and the ambient temperature is less than a first preset difference, supplying electric energy to the metal mesh cloth 300 is stopped.

[0089] In this embodiment, the difference between the detected ambient temperature and the mesh temperature is calculated, and then based on the difference between the two, it is determined whether it is necessary to supply electric energy to the metal mesh 300 and whether it is necessary to stop supplying electric energy. When the mesh temperature is higher than the ambient temperature and the difference between the two is greater than the first preset difference, it can be determined that the current environment of the speaker module is a relatively humid and cold environment. At this time, the metal mesh 300 can be controlled to heat up. When the mesh 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 environment in which the speaker module is located is a relatively high temperature environment. At this time, the metal mesh 300 can be controlled to stop heating.

[0090] Reference Figures 1 to 4 , the sixth method, based on the first method, a third preset humidity is set, the electronic control component 500 is also electrically connected to the speaker component 100, and the electronic control component 500 is also used to stop supplying power to the speaker component 100 when it is detected that the humidity of the metal mesh reaches the third preset humidity; wherein the third preset humidity is greater than the first preset humidity.

[0091] It is understandable that in case of typhoon weather, rainstorm weather, or long-term rainy weather, the metal mesh may not be able to prevent rainwater from penetrating into the speaker module. In order to avoid water stains penetrating into the speaker module housing 200, leakage and short circuit may occur when the speaker assembly 100 continues to work. This embodiment can stop supplying power to the speaker assembly 100 when it is detected that the humidity of the metal mesh reaches the third preset humidity. At the same time, the terminal device connected to the speaker module by wireless transmission can send a signal to the user through the terminal device that the speaker assembly 100 needs to stop working, thereby achieving human-computer interaction while ensuring electricity safety. When it is detected that the humidity of the metal mesh is less than or equal to the first preset humidity, power is provided to the speaker assembly 100, and then the power supply of the speaker assembly 100 is restored to ensure electricity safety, so that the speaker assembly 100 can resume normal operation as soon as possible under harsh conditions.

[0092] Reference Figures 1 to 4 In one embodiment, the electric control component 500 is also electrically connected to the speaker, and the electric control component 500 is also used to provide electrical energy to the speaker component 100 when it is detected that the humidity of the metal mesh cloth 300 is less than or equal to the first preset humidity.

[0093] In this embodiment, in order to ensure the safety of electricity use, when encountering typhoon weather, heavy rain weather, or long-term rainy weather, the metal mesh cloth 300 may not be able to prevent rainwater from penetrating into the speaker module, so as to avoid leakage and short circuit when the speaker assembly 100 continues to work when there is water stains infiltrated into the speaker module shell 200. In this embodiment, when it is detected that the humidity of the metal mesh cloth 300 reaches the first preset humidity or the third preset humidity, the power supply of the speaker assembly 100 can be disconnected. Under the heating control of the main controller 510, the water stains on the metal mesh cloth 300 will be reduced, so that the humidity of the metal mesh cloth 300 will decrease. When it is detected that the humidity is less than or equal to the first preset humidity, the power supply of the speaker assembly 100 will be restored to ensure the safety of electricity use, so that the speaker assembly 100 can resume normal operation as soon as possible under harsh conditions.

[0094] Reference Figures 1 to 4 In one embodiment, the speaker module further includes:

[0095] At least one insulating layer (not shown) is disposed on a side of the metal mesh cloth 300 facing away from the speaker assembly 100 .

[0096] In this embodiment, the insulating layer can be coated on both sides of the metal mesh cloth 300, or can be only arranged on the side of the metal mesh cloth 300 facing away from the speaker assembly 100. The insulating layer can be made of a material with certain waterproof properties such as water-based paint, which can prevent the metal mesh cloth 300 from oxidation and corrosion.

[0097] In order to further improve the heat dissipation capacity of the speaker module, the metal mesh 300 can be provided with a heat-conducting extension part, which can be in contact with the speaker assembly 100, so that the heat of the speaker assembly 100 is transferred to the metal mesh 300 through the heat-conducting extension part. The heat-conducting extension part of the metal mesh 300 can be in contact with the parts of the speaker assembly 100 that generate heat or have strong heat conductivity to increase the rate of heat transfer. The speaker assembly 100 includes a magnetic circuit system, which is a component in the speaker that generates heat more, and is usually made of metal material and has strong heat conductivity. The heat-conducting extension part of the metal mesh 300 can be in contact with the bottom surface of the magnetic circuit system through the housing 200.

[0098] In some embodiments, a buffer layer may be provided between the metal mesh 300 and the speaker assembly 100 . The buffer layer may specifically be foam and is used to seal the speaker assembly 100 and also to buffer the sound wave pressure generated by the speaker assembly 100 acting on the metal mesh 300 .

[0099] Reference Figures 1 to 4 , refer to Figures 1 to 4 In one embodiment, the end of the upper end 210 of the speaker accommodating cavity close to the sound outlet is inclined away from the speaker assembly 100.

[0100] In this embodiment, the end of the upper end 210 of the speaker accommodating cavity is inclined at a certain angle to the horizontal plane to form a rain shield structure, so that rain that drifts into the speaker module flows along the rain shield structure to the speaker module, which can reduce the accumulation of water stains on the heat-conductive and sound-transparent mesh.

[0101] In this embodiment, the housing 200 includes an upper end 210 of a speaker accommodating cavity and a lower end 220 of a speaker accommodating cavity. The upper end 210 of the speaker accommodating cavity forms a sound device accommodating cavity. The sound outlet is provided at one end edge of the upper end 210 of the speaker accommodating cavity and the lower end 220 of the speaker accommodating cavity. The housing 200 is set as a split structure, which can facilitate the processing of the housing 200. The upper end 210 of the speaker accommodating cavity and the lower end 220 of the speaker accommodating cavity can be made of plastic. The upper end 210 of the speaker accommodating cavity and the lower end 220 of the speaker accommodating cavity can be connected by a buckle. The upper end 210 of the speaker accommodating cavity and the lower end 220 of the speaker accommodating cavity can also be a buckle connection or a threaded connection. The setting of this structure can also facilitate the speaker assembly 100. During assembly, the speaker assembly 100 can be installed in the speaker accommodating cavity, and then the heat-conductive and sound-transparent mesh can be encapsulated on the sound outlet to improve assembly efficiency. The end of the lower end 220 of the speaker accommodating cavity is inclined at a certain angle to the horizontal plane, forming a water guide structure, so that when water stains on the heat-conductive and sound-permeable mesh 300 flow into the lower end 220 of the speaker accommodating cavity under the action of gravity, the discharge of water is accelerated through the inclined surface of the lower end 220 of the speaker accommodating cavity, which can prevent water stains from accumulating in the lower end 220 of the speaker accommodating cavity or even penetrating into the shell 200.

[0102] Reference Figures 1 to 4 In one embodiment, the metal mesh 300 is fixedly connected to the housing 200 by screws / snaps;

[0103] Alternatively, the metal mesh cloth 300 further has a riveting portion, and is fixed to the housing 200 by riveting the riveting portion;

[0104] Alternatively, the metal mesh cloth 300 is bonded to the housing 200 .

[0105] In this embodiment, the metal mesh cloth 300 can be bonded to the housing 210 through the adhesive layer 103 and the buffer layer. The metal mesh cloth 300 can also be fixedly connected to the speaker assembly 100 through the buffer layer 101 and the adhesive layer 102. When the speaker module is assembled, after the buffer layer and the adhesive layer are set between the metal mesh cloth 300 and the housing 200, the heat-conductive sound-transmitting mesh is fixed to the housing 200 through the adhesive layer, so that the metal mesh cloth 300 is in direct contact with the buffer layer and fixed to the housing 200 by pressing. After the buffer layer 101 and the adhesive layer 102 are set between the metal mesh cloth 300 and the speaker assembly 100, the speaker assembly 100 can be fixed to the housing 200 by screws, buckles, etc. The buffer layer can be realized by foam. The foam 101 can retain a certain amount of compression to prevent the vibration generated by the speaker assembly 100 when working from colliding with the housing 200 and causing noise; the metal mesh 300 is adhered to the foam (not shown) through the double-sided adhesive 103, and is adhered to the housing 200 through the double-sided adhesive 103; because the foam 101 is compressed, the metal mesh 300 will also be squeezed to ensure a secure assembly. The adhesive layers 102 and 103 are usually made of waterproof materials, and their width is greater than 2 mm, so that the overall waterproofness is ensured.

[0106] The present invention also provides an outdoor fixed audio device, including the speaker module as described above. The detailed structure of the speaker module can refer to the above embodiment, which will not be repeated here; it can be understood that since the above speaker module is used in the outdoor fixed audio device of the present invention, the embodiment of the outdoor fixed audio device of the present invention includes all technical solutions of all embodiments of the above speaker module, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0107] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A speaker module, characterized in that: The speaker module comprises: Speaker assembly; A housing, wherein the housing is provided with a speaker accommodating cavity and a sound outlet communicated with the speaker accommodating cavity, and the speaker assembly is fixed in the speaker accommodating cavity; A metal mesh cloth, the metal mesh cloth covering the sound outlet; an electric control component, electrically connected to the metal mesh, the electric control component being used to detect the humidity of the metal mesh, and when detecting that the humidity of the metal mesh reaches a first preset humidity, providing electric energy to the metal mesh to control the metal mesh to convert the electric energy into heat energy; The electric control component is also used to stop supplying electric energy to the metal mesh when the humidity of the metal mesh is less than or equal to a second preset humidity; wherein the first preset humidity is greater than the second preset humidity.

2. The speaker module according to claim 1, wherein: The electric control component is also used to adjust the power value of the electric energy provided to the metal mesh cloth according to the detected humidity of the metal mesh cloth when the humidity of the metal mesh cloth is between the first preset humidity and the second preset humidity.

3. The speaker module according to claim 1, wherein: The speaker module also includes: A first temperature detection device is disposed close to the metal mesh, and is used to detect the temperature of the metal mesh and output a temperature detection signal; The electric control component is also connected to the first temperature detection device, and is also used to provide / stop providing electric energy to the metal mesh when providing electric energy to the metal mesh according to the mesh temperature detection signal.

4. The speaker module according to claim 3, characterized in that: The electronic control component is specifically used for: When it is determined according to the mesh temperature detection signal that the metal mesh temperature is lower than a first preset temperature, maintaining the supply of electric energy to the metal mesh; When it is determined according to the mesh temperature detection signal that the metal mesh temperature is greater than a second preset temperature, supplying electric energy to the metal mesh is stopped; wherein the second preset temperature is greater than the first preset temperature.

5. The speaker module according to claim 3, characterized in that: The speaker module also includes: A second temperature detection device is disposed on the housing and away from the metal mesh, and is used to detect the ambient temperature and output an ambient temperature detection signal; The electric control component is also connected to the second temperature detection device, and is also used to provide / stop providing electric energy to the metal mesh when providing electric energy to the metal mesh according to the mesh temperature detection signal and the ambient temperature detection signal.

6. The speaker module according to claim 5, characterized in that: The electronic control component is specifically used for: When it is determined according to the mesh temperature detection signal and the ambient temperature detection signal that the difference between the temperature of the metal mesh and the ambient temperature is greater than a first preset difference, supplying electric energy to the metal mesh; When it is determined according to the mesh temperature detection signal and the ambient temperature detection signal that the difference between the temperature of the metal mesh and the ambient temperature is less than a first preset difference, supplying electric energy to the metal mesh is stopped.

7. The speaker module according to claim 1, wherein: The electronic control component is also electrically connected to the speaker component, and is also used to stop supplying power to the speaker component when it is detected that the humidity of the metal mesh reaches a third preset humidity; wherein the third preset humidity is greater than the first preset humidity.

8. The speaker module according to claim 1, wherein: The electric control component is also electrically connected to the speaker component, and is also used to provide electrical energy to the speaker component when it is detected that the humidity of the metal mesh is less than or equal to the first preset humidity.

9. The speaker module according to any one of claims 1 to 8, characterized in that: The speaker module also includes: At least one insulating layer is disposed on a side of the metal mesh cloth facing away from the speaker assembly.

10. The loudspeaker module according to any one of claims 1 to 8, characterized in that: The housing has a speaker accommodating cavity, and the end of the lower end of the speaker accommodating cavity close to the sound outlet is inclined toward the speaker assembly; And / or, an end portion of the upper end of the speaker accommodating cavity close to the sound outlet is inclined away from the speaker assembly.

11. An outdoor fixed audio device, characterized in that: Comprising a speaker module as described in any one of claims 1-10.

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