Protection equipment for automobile loudspeaker

Abstract

The invention discloses an automobile loudspeaker protection device which comprises a shell, a front cover plate is arranged on the front side of the shell, a loudspeaker body is installed on the inner wall of the rear side of the shell, a partition plate is arranged in the shell, a plurality of rotating rods are rotationally connected to the inner wall of the rear side of the shell, fans are installed on the rotating rods, and the loudspeaker body is installed on the partition plate. A plurality of air inlets are formed in the front cover plate, a rectangular block is arranged in the shell, and two rectangular grooves are formed in the front side of the rectangular block. According to the protection equipment, constant-temperature and dry gas enters the shell, the service life of the loudspeaker is prolonged while heat dissipation of the loudspeaker is ensured, meanwhile, the water absorption of each silica gel particle can be brought into full play through the arrangement of the conveying assembly and the electric heating plate, the service time of each silica gel particle is prolonged, and the service life of the loudspeaker is prolonged. And meanwhile, by means of forward and reverse rotation of the driving motor, constant-temperature dry gas can always enter the shell under the condition that manual intervention is not needed.

Description

Technical Field

[0001] The invention relates to the technical field of loudspeakers, and in particular to a protective device for automobile loudspeakers. Background Art

[0002] In the car audio system, the speaker is a key component, and its performance and service life are crucial to the user's audio experience. However, the existing car speaker protection equipment has many limitations and it is difficult to meet the growing demand for all-round protection of speakers.

[0003] On the one hand, in terms of heat dissipation, most existing protection devices only rely on natural heat dissipation or simple passive heat dissipation methods, such as only naturally conducting heat through the shell material. This heat dissipation method is inefficient and cannot effectively and timely remove the large amount of heat generated by the speaker when it is working. It is easy to cause the speaker to overheat during long-term use, resulting in performance degradation and shortened life.

[0004] On the other hand, in terms of moisture-proofing, the existing protection measures are not perfect. Although some equipment can prevent the direct entry of external moisture to a certain extent, it is not capable of coping with changes in humidity in the car's internal environment. For example, when a car is driving under different climatic conditions, such as humid rainy days or environments with large temperature differences, water vapor in the air can easily condense on the surface of the speaker casing, or directly enter the space where the speaker is located, causing serious problems such as rusting of speaker components, short circuits, and deterioration of sound quality. Moreover, the existing moisture-proofing methods are often relatively single and cannot take into account multiple needs such as humidity regulation and prevention of water vapor condensation.

[0005] Furthermore, regarding the use of dehumidification materials, although some existing equipment uses dehumidification materials to reduce environmental humidity, there are many inconveniences. For example, after the dehumidification materials are saturated with adsorption, they often need to be frequently handled and replaced manually, which not only increases maintenance costs and workload, but also in actual use, it is difficult to accurately grasp the adsorption state of the dehumidification materials, which may lead to failure to replace them in time and lose the dehumidification effect, affecting the dryness of the environment where the speaker is located.

[0006] Therefore, it is necessary to design a protective device for a car speaker to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings existing in the prior art, and to propose a protective device for a car speaker, which allows constant temperature and dry gas to enter the outer shell, ensuring the heat dissipation of the speaker while extending the service life of the speaker. At the same time, through the setting of the conveying component and the electric heating plate, the water absorption of each silica gel particle can be fully utilized and the service life of each silica gel particle can be extended. At the same time, by utilizing the forward and reverse rotation of the driving motor, the device can ensure that constant temperature and dry gas always enters the outer shell without human intervention.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A protective device for a car speaker comprises a shell 1, wherein a front cover is provided on the front side of the shell 1, a speaker body 2 is installed on the inner wall of the rear side of the shell 1, a partition 31 is provided in the shell 1, a plurality of rotating rods 26 are rotatably connected to the inner wall of the rear side of the shell 1, a fan 28 is installed on each of the plurality of rotating rods 26, a plurality of air inlets 7 are provided on the front cover, a rectangular block 42 is provided in the shell 1, two rectangular grooves 34 are provided on the front side of the rectangular block 42, a plurality of through openings 5 ​​are provided on the inner wall of the rear side of the two rectangular grooves 34, the spaces on the left and right sides of the shell 1 located on the partition 31 are connected through two air pipes 25, a humidity sensor 30 is installed on the inner wall of the left side of the shell 1, the two rectangular grooves 34 are filled with silica gel particles, the left and right inner walls of the two rectangular grooves 34 are fixedly connected with triangular blocks 33, the silica gel particles are located below the plurality of triangular blocks 33, and a conveying component is provided in the rectangular block 42.

[0010] Preferably, a drive motor 19 is installed on the rear side of the shell 1, and the rear sides of the multiple rotating rods 26 extend to the outside, and the two rotating rods 26 located on the same side are connected by a fourth transmission assembly 24. The rear side of the shell 1 is rotatably connected to two cross bars 22, and the two cross bars 22 are connected to the corresponding rotating rods 26 by a third transmission assembly 23. A second gear 20 is installed on the output shaft of the drive motor 19, and a third gear 21 is provided on the two cross bars 22, and a one-way bearing is provided between the two cross bars 22 and the corresponding third gear 21.

[0011] Preferably, the conveying assembly includes two conveying troughs 35 arranged on the front side of the rectangular block 42, the inner top and inner bottom of the two conveying troughs 35 are rotatably connected to the conveying rod 15, the outer walls of the two conveying rods 15 are fixedly connected to spiral blades 36, the upper ends of the two conveying rods 15 extend to the outside, the two rectangular grooves 34 are connected to the bottom space of the conveying trough 35 through the feed port, and the two rectangular grooves 34 are connected to the top space of the conveying trough 35 through the discharge port.

[0012] Preferably, an L-shaped block 9 is fixedly connected to the upper end of the shell 1, and two short rods 10 are rotatably connected to the upper end of the L-shaped block 9. The two short rods 10 are connected to the corresponding conveying rods 15 through a first connecting component. A fixed plate 14 is fixedly connected to the rear side of the shell 1, and two vertical rods 13 are rotatably connected to the fixed plate 14. The vertical rod 13 on the left side is connected to the two conveying rods 15 through a second transmission component 12, and the vertical rod 13 on the right side is connected to the two short rods 10 through a first transmission component 11.

[0013] Preferably, the rear side of the shell 1 is rotatably connected to a transmission rod 16, and a first gear 17 is installed on the transmission rod 16, and the first gear 17 is meshed with a third gear 21 located on the right side. The lower end of the fixed plate 14 is rotatably connected to a thin rod, and the thin rod is connected to the vertical rod 13 through a second connecting assembly. The thin rod and the transmission rod 16 are both provided with second bevel gears 27 that mesh with each other, and the vertical rod 13 located on the right and the cross bar 22 located on the right are both provided with first bevel gears 18 that mesh with each other.

[0014] Preferably, the first connecting component includes a first connecting groove arranged at the lower end of the short rod 10, a first electromagnet 39 is embedded in the inner top of the first connecting groove, a first clamping block 40 is slidably connected in the first connecting groove, the first clamping block 40 is elastically connected to the adjacent side of the first electromagnet 39 through a first spring 38, a first clamping groove 41 is provided at the upper end of the conveying rod 15, the second connecting component includes a second connecting groove arranged at the lower end of the left vertical rod 13, a second electromagnet is embedded in the inner top of the second connecting groove, a second clamping block is slidably connected in the second connecting groove, the second clamping block is elastically connected to the adjacent side of the second electromagnet through a second spring, and a second clamping groove is provided at the upper end of the thin rod.

[0015] Preferably, the first transmission assembly includes a first sprocket arranged on the right vertical rod 13 and the two short rods 10, and the three first sprockets are connected by a first chain transmission. The second transmission assembly includes a second sprocket arranged on the left vertical rod 13 and the two conveying rods 15, and the three second sprockets are connected by a second chain transmission. The third transmission assembly 23 includes a third sprocket arranged on the cross rod 22 and the rotating rod, and the two third sprockets are connected by a third chain transmission. The fourth transmission assembly 24 includes a fourth sprocket arranged on the corresponding two rotating rods 26, and the two fourth sprockets are connected by a fourth chain transmission.

[0016] Preferably, the adjacent side inner walls of the two rectangular grooves 34 are both obliquely fixedly connected with electric heating plates 32, the inner tops of the two rectangular grooves 34 are each provided with a plurality of air holes 8, a constant temperature water tank 2 is installed on the left side of the outer shell 1, a circulating pump 3 is installed at the lower end of the outer shell 1, the liquid inlet end of the circulating pump 3 is connected to the bottom space of the constant temperature water tank 2 through an inlet pipe 6, the liquid outlet end of the circulating pump 3 is connected to an outlet pipe 4, the outlet pipe 4 is connected to the right side of the constant temperature water tank 2 through a plurality of transverse pipes 37, and the plurality of transverse pipes 37 all pass through the corresponding air inlet 7.

[0017] The present invention has the following beneficial effects:

[0018] 1. Compared with the existing technology, the multiple fans, constant temperature water tanks and silica gel particles can ensure that the gas entering the shell is always in a constant temperature and dry state while dissipating the heat of the speaker, effectively preventing the speaker parts from rusting, short circuiting and sound quality degradation caused by a humid environment, and providing more comprehensive moisture-proof protection for the speaker;

[0019] 2. Compared with the prior art, through the forward and reverse rotation of the partition and the driving motor, when the output shaft of the driving motor rotates clockwise, the two rotating rods on the left drive the fan to rotate, so that the outside air enters the space on the left and then is discharged through the space on the right. When the output shaft of the driving motor rotates counterclockwise, it drives the two fans on the right to rotate, and the outside air enters through the space on the right and then is discharged through the space on the left, so that the silica gel particles in the two rectangular grooves are recycled;

[0020] 3. Compared with the prior art, the arrangement of the conveying assembly and the electric heating plate can, on the one hand, enable each silica gel particle to be in contact with the air, giving full play to the moisture absorption of each silica gel particle, and at the same time, each silica gel particle can pass through the electric heating plate, extending the service life of each silica gel particle, and when the rotation direction of the driving motor changes, the silica gel particles on the exhaust side will no longer be in contact with the humid air. At this time, the silica gel particles will be heated when in contact with the electric heating plate, so that the moisture in the silica gel particles is discharged, so that the equipment can always be in a self-running state, without the need for people to handle and replace the silica gel particles;

[0021] 4. Compared with the prior art, through the arrangement of the first transmission assembly, the second transmission assembly and the connecting assembly, when the output shaft of the driving motor rotates clockwise or counterclockwise, the two conveying rods will always keep rotating clockwise, so that the threaded blades can stably convey the silica gel particles upward, ensuring the effect of evaporating the water in the silica gel particles.

[0022] In summary, the car speaker protection device is equipped with multiple fans, constant temperature water tanks and silica gel particles. While effectively dissipating heat, it ensures that the gas entering the shell is kept at a constant temperature and dry, and comprehensively prevents problems such as rusting of speaker components and deterioration of sound quality due to moisture. It has good moisture-proof effect. By using partitions and forward and reverse rotation of the drive motor, the gas inlet and outlet and fan rotation can be regulated according to the rotation direction of the motor to achieve the recycling of silica gel particles. With the help of conveying components and electric heating plates, the silica gel particles can fully absorb moisture and extend the service life through the electric heating plate. When the rotation direction of the motor changes, the moisture of the silica gel particles can be automatically discharged. The equipment can run automatically without manual processing and replacement. In addition, the specific transmission components and connecting components are set to ensure that the conveying rod can stably rotate clockwise regardless of the forward and reverse rotation of the drive motor, ensuring the evaporation effect of the silica gel particles. The overall operation is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a protective device for a car speaker proposed by the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of the rear structure;

[0025] Figure 3 for Figure 1 Schematic diagram of the structure after removing the front cover;

[0026] Figure 4 for Figure 1 Half-section of

[0027] Figure 5 It is a half-section view of the short rod and the conveying rod.

[0028] In the figure: 1 shell, 2 constant temperature water tank, 3 circulating pump, 4 water outlet pipe, 5 port, 6 water inlet pipe, 7 air inlet, 8 air hole, 9 L-shaped block, 10 short rod, 11 first transmission assembly, 12 second transmission assembly, 13 vertical rod, 14 fixed plate, 15 conveying rod, 16 transmission rod, 17 first gear, 18 first bevel gear, 19 driving motor, 20 second gear, 21 third gear, 22 cross bar, 23 third transmission assembly, 24 fourth transmission assembly, 25 air pipe, 26 rotating rod, 27 second bevel gear, 28 fan, 29 speaker body, 30 humidity sensor, 31 partition, 32 electric heating plate, 33 triangular block, 34 rectangular groove, 35 conveying groove, 36 spiral blade, 37 cross tube, 38 first spring, 39 first electromagnet, 40 first clamping block, 41 first clamping groove, 42 rectangular block. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] Reference Figure 1-Figure 5A protective device for a car speaker comprises a housing 1, a front cover plate is arranged on the front side of the housing 1, a speaker body 29 is installed on the inner wall of the rear side of the housing 1, a partition plate 31 is arranged inside the housing 1, a plurality of rotating rods 26 are rotatably connected to the inner wall of the rear side of the housing 1, a fan 28 is installed on each of the plurality of rotating rods 26, a plurality of air inlets 7 are arranged on the front cover plate, a rectangular block 42 is arranged inside the housing 1, two rectangular grooves 34 are arranged on the front side of the rectangular block 42, a plurality of through openings 5 ​​are arranged on the inner wall of the rear side of the two rectangular grooves 34, and the housing 1 is located on the left and right sides of the partition plate 31 The space is connected through two air pipes 25. A humidity sensor 30 is installed on the left inner wall of the shell 1. The two rectangular grooves 34 are filled with silica gel particles. Silica gel is a highly active adsorption material, usually with a porous structure and a large specific surface area, which enables it to efficiently adsorb water vapor in the air. When the silica gel is saturated with adsorption, it can be regenerated by heating. The left and right inner walls of the two rectangular grooves 34 are fixedly connected with triangular blocks 33. The silica gel particles are located below the multiple triangular blocks 33, and a conveying component is provided in the rectangular block 42.

[0031] Among them, a driving motor 19 is installed on the rear side of the shell 1, and the driving motor 19 is a servo motor. The rear sides of multiple rotating rods 26 extend to the outside, and the two rotating rods 26 located on the same side are connected by a fourth transmission assembly 24. The fourth transmission assembly 24 includes a fourth sprocket arranged on the corresponding two rotating rods 26, and the two fourth sprockets are connected by a fourth chain transmission. The rear side of the shell 1 is rotatably connected to two cross bars 22, and the two cross bars 22 are connected to the corresponding rotating rods 26 through a third transmission assembly 23. The third transmission assembly 23 includes a third sprocket arranged on the cross bar 22 and the rotating rod 26, and the two third sprockets are connected by a third chain transmission. A second gear 20 is installed on the output shaft of the driving motor 19, and a third gear 21 is provided on the two cross bars 22. The two cross bars 22 are connected to the corresponding A one-way bearing is provided between the third gears 21. When the output shaft of the drive motor 19 rotates clockwise, the two third gears 21 rotate counterclockwise, so that the third gear 21 on the left side can drive the cross bar 22 to rotate, and the third gear 21 on the right side cannot drive the cross bar 22 to rotate. When the output shaft of the drive motor 19 rotates counterclockwise, the two third gears 21 rotate clockwise, so that the third gear 21 on the left side cannot drive the cross bar 22 to rotate, and the third gear 21 on the right side can drive the cross bar 22 to rotate. A controller is provided. Every time the humidity sensor 30 generates an electrical signal and transmits it to the controller, the controller controls the drive motor 19 to be in a counterclockwise rotation state for a period of time, and controls the first electromagnet 39 and the second electromagnet to be energized.

[0032] Among them, the conveying assembly includes two conveying troughs 35 arranged on the front side of the rectangular block 42, the inner top and inner bottom of the two conveying troughs 35 are rotatably connected to the conveying rod 15, the outer walls of the two conveying rods 15 are fixedly connected with spiral blades 36, the upper ends of the two conveying rods 15 extend to the outside, the two rectangular grooves 34 are connected to the bottom space of the conveying trough 35 through the feed port, and the two rectangular grooves 34 are connected to the top space of the conveying trough 35 through the discharge port.

[0033] Among them, an L-shaped block 9 is fixedly connected to the upper end of the shell 1, and two short rods 10 are rotatably connected to the upper end of the L-shaped block 9. The two short rods 10 are connected to the corresponding conveying rods 15 through a first connecting assembly. A fixed plate 14 is fixedly connected to the rear side of the shell 1. Two vertical rods 13 are rotatably connected to the fixed plate 14. The vertical rod 13 on the left side is connected to the two conveying rods 15 through a second transmission assembly 12. The second transmission assembly 12 includes a second sprocket arranged on the left vertical rod 13 and the two conveying rods 15, and the three second sprockets are connected through a second chain transmission. The vertical rod 13 on the right side is connected to the two short rods 10 through a first transmission assembly 11. The first transmission assembly 11 includes a first sprocket arranged on the right vertical rod 13 and the two short rods 10, and the three first sprockets are connected through a first chain transmission.

[0034] Among them, the rear side of the shell 1 is rotatably connected to the transmission rod 16, and a first gear 17 is installed on the transmission rod 16. The first gear 17 is meshed with the third gear 21 located on the right side. The lower end of the fixed plate 14 is rotatably connected to a thin rod, and the thin rod is connected to the vertical rod 13 through a second connecting component. The thin rod and the transmission rod 16 are both provided with second bevel gears 27 that mesh with each other, and the vertical rod 13 located on the right and the cross bar 22 located on the right are both provided with first bevel gears 18 that mesh with each other.

[0035] Among them, the first connecting component includes a first connecting groove arranged at the lower end of the short rod 10, a first electromagnet 39 is embedded in the inner top of the first connecting groove, a first clamping block 40 is slidably connected in the first connecting groove, the first clamping block 40 is made of magnetic material, and the first clamping block 40 is elastically connected to the adjacent side of the first electromagnet 39 through a first spring 38, a first clamping groove 41 is arranged at the upper end of the conveying rod 15, and the second connecting component includes a second connecting groove arranged at the lower end of the left vertical rod 13, a second electromagnet is embedded in the inner top of the second connecting groove, and a first clamping block 40 is slidably connected in the second connecting groove. A second card block is connected, the second card block is made of iron material, the second card block is elastically connected to the adjacent side of the second electromagnet through a second spring, a second card slot is provided at the upper end of the thin rod, the first connecting component and the second connecting component have the same structure, in the initial state, the first card block 40 is not located in the first card slot 41, and the second card block is located in the second card slot, when the first electromagnet 39 and the second electromagnet are energized, the first electromagnet 39 produces a repulsive force on the first card block 40, and the second electromagnet produces an attractive force on the second card block, so that the second card block is disengaged from the second card slot.

[0036] Among them, the adjacent side inner walls of the two rectangular grooves 34 are both obliquely fixedly connected with the electric heating plate 32, the inner tops of the two rectangular grooves 34 are each provided with a plurality of air holes 8, a constant temperature water tank 2 is installed on the left side of the outer shell 1, and a circulating pump 3 is installed at the lower end of the outer shell 1, the liquid inlet end of the circulating pump 3 is connected to the bottom space of the constant temperature water tank 2 through an inlet pipe 6, the liquid outlet end of the circulating pump 3 is connected to an outlet pipe 4, and the outlet pipe 4 is connected to the right side of the constant temperature water tank 2 through a plurality of transverse pipes 37, and the plurality of transverse pipes 37 all pass through the corresponding air inlet 7.

[0037] The functional principle of the present invention can be explained through the following operation mode: when the speaker is in use, when the weather temperature is high or low, the circulation pump 3 is in operation, so that a liquid circulation of the constant temperature water tank 2 → the circulation pump 3 → the plurality of transverse pipes 37 → the constant temperature water tank 2 is formed, thereby ensuring that the temperature of the gas entering the housing 1 is always at a relatively suitable temperature state, thereby avoiding the situation where the service life of the speaker body 29 is shortened due to high or low temperature;

[0038] During the use of the speaker body 29, the output shaft of the driving motor 19 is in a clockwise rotation state, thereby driving the second gear 20 to rotate clockwise. Since the two third gears 21 are meshed with the second gear 20, the second gear 20 drives the two third gears 21 to rotate. Due to the setting of the two one-way bearings, the third gear 21 on the left side can drive the corresponding cross bar 22 to rotate, and the third gear 21 on the right side cannot drive the corresponding cross bar 22 to rotate. Under the action of the third transmission assembly 23 and the fourth transmission assembly 24, the two fans 28 on the left side will be driven to rotate, so that the external air will first enter the left side space of the shell 1, and then enter the right side space of the shell 1 through the air pipe 25 and then be discharged to the outside. Since the two rectangular grooves 34 are filled with silica gel particles, the silica gel particles will absorb the moisture of the gas entering the shell 1, thereby preventing moisture from contacting the speaker body 29;

[0039] When the moisture in the silica gel particles on the left side absorbs more, moisture will enter the housing 1. The humidity sensor 30 senses the moisture and generates an electrical signal which is transmitted to the controller. The controller controls the output shaft of the drive motor 19 to rotate counterclockwise, and drives the two third gears 21 to rotate clockwise through the second gear 20. At this time, the third gear 21 on the right side drives the cross bar 22 to rotate, and the third gear 21 on the left side cannot drive the cross bar 22 to rotate, so that the outside air first enters the right side space of the housing 1, and then enters the left side space of the housing 1 through the air pipe 25 before being discharged to the outside.

[0040] When the output shaft of the driving motor 19 rotates clockwise, the first gear 17 is driven to rotate through the second gear 20 and the third gear 21, and the first gear 17 drives the transmission rod 16 to rotate. Since the two second bevel gears 27 are in a meshing state and the second clamping block is located in the second clamping groove, the vertical rod 13 on the left side through the thin rod rotates, and the two conveying rods 15 are driven to rotate counterclockwise through the second transmission assembly 12, so that the spiral blade 36 rotates counterclockwise, and the silica gel particles entering the conveying groove 35 at the bottom of the rectangular groove 34 are transported upward, and then fall onto the electric heating plate 32 through the discharge port. Since the electric heating plate 32 is tilted, the silica gel particles will roll down and then fall back into the space below the rectangular groove 34 through the gap between the two triangular blocks 33;

[0041] When the humidity sensor 30 transmits an electrical signal to the controller, the controller controls the two first electromagnets 39 and the second electromagnet to be energized. After the two first electromagnets 39 are energized, a repulsive force is generated on the corresponding first card block 40, so that the first card block 40 enters the first card slot 41, and the short rod 10 is connected to the conveying rod 15. At the same time, the second electromagnet generates an attractive force on the second card block, so that the second card block is disengaged from the second card slot, so that the vertical rod 13 on the left is separated from the thin rod. At this time, the output shaft of the driving motor 19 rotates counterclockwise to drive the cross bar 22 on the right to rotate clockwise, and then drives the two conveying rods 15 to rotate counterclockwise through the first bevel gear 18 and the first transmission assembly 11, so that the two spiral blades 36 can continue to stably convey the silica gel particles upward;

[0042] Since the two spiral blades 36 are always in a clockwise rotation state, the silica gel particles will continuously pass through the electric heating plate 32 and then fall back under the multiple triangular blocks 33 to dry the adsorbed moisture in the silica gel particles. On the one hand, it can increase the trigger cycle of the humidity sensor 30. On the other hand, when the silica gel particles on one side of the device absorb more water, the silica gel particles can be dried quickly, so that people do not need to replace the silica gel particles.

[0043] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A protective device for a car speaker, comprising a housing (1), characterized in that: A front cover plate is provided on the front side of the housing (1); a speaker body (29) is installed on the inner wall of the rear side of the housing (1); a partition plate (31) is provided inside the housing (1); a plurality of rotating rods (26) are rotatably connected to the inner wall of the rear side of the housing (1); a fan (28) is installed on each of the plurality of rotating rods (26); a plurality of air inlets (7) are provided on the front cover plate; a rectangular block (42) is provided inside the housing (1); two rectangular grooves (34) are provided on the front side of the rectangular block (42); the two rectangular grooves (34) are provided on the front side of the rectangular block (42); A plurality of openings (5) are provided on the inner wall at the rear side of the groove (34); the outer shell (1) is located on the left and right sides of the partition (31) and is connected via two air pipes (25); a humidity sensor (30) is installed on the left inner wall of the outer shell (1); the two rectangular grooves (34) are filled with silica gel particles; the left and right inner walls of the two rectangular grooves (34) are fixedly connected with triangular blocks (33); the silica gel particles are located below the plurality of triangular blocks (33); and a conveying assembly is provided in the rectangular block (42).

2. The protective device for a car speaker according to claim 1, characterized in that: A driving motor (19) is installed on the rear side of the housing (1); the rear sides of the plurality of rotating rods (26) extend to the outside; two rotating rods (26) located on the same side are connected in transmission via a fourth transmission assembly (24); two cross bars (22) are rotatably connected to the rear side of the housing (1); the two cross bars (22) and the corresponding rotating rods (26) are connected in transmission via a third transmission assembly (23); a second gear (20) is installed on the output shaft of the driving motor (19); the two cross bars (22) are each provided with a third gear (21); and one-way bearings are each provided between the two cross bars (22) and the corresponding third gear (21).

3. The protective device for a car speaker according to claim 1, characterized in that: The conveying assembly comprises two conveying grooves (35) arranged at the front side of the rectangular block (42); the inner top and inner bottom of the two conveying grooves (35) are rotatably connected to a conveying rod (15); the outer walls of the two conveying rods (15) are fixedly connected to spiral blades (36); the upper ends of the two conveying rods (15) extend to the outside; the two rectangular grooves (34) are connected to the bottom space of the conveying groove (35) through a feed port; and the two rectangular grooves (34) are connected to the top space of the conveying groove (35) through a discharge port.

4. The protective device for a car speaker according to claim 2, characterized in that: The upper end of the housing (1) is fixedly connected to an L-shaped block (9), and the upper end of the L-shaped block (9) is rotatably connected to two short rods (10), and the two short rods (10) are connected to corresponding conveying rods (15) via a first connecting assembly. The rear side of the housing (1) is fixedly connected to a fixing plate (14), and two vertical rods (13) are rotatably connected to the fixing plate (14). The vertical rod (13) located on the left side is connected to the two conveying rods (15) via a second transmission assembly (12), and the vertical rod (13) located on the right side is connected to the two short rods (10) via a first transmission assembly (11).

5. The protective device for a car speaker according to claim 4, characterized in that: The rear side of the housing (1) is rotatably connected to a transmission rod (16), a first gear (17) being mounted on the transmission rod (16), the first gear (17) being meshed with a third gear (21) located on the right side, a thin rod being rotatably connected to the lower end of the fixing plate (14), the thin rod being connected to the vertical rod (13) via a second connecting assembly, the thin rod and the transmission rod (16) being provided with second bevel gears (27) meshing with each other, the vertical rod (13) located on the right side and the cross rod (22) located on the right side being provided with first bevel gears (18) meshing with each other.

6. The protective device for a car speaker according to claim 4, characterized in that: The first connecting component comprises a first connecting groove arranged at the lower end of the short rod (10), a first electromagnet (39) is embedded in the inner top of the first connecting groove, a first clamping block (40) is slidably connected in the first connecting groove, the first clamping block (40) is elastically connected to the adjacent side of the first electromagnet (39) through a first spring (38), the upper end of the conveying rod (15) is provided with a first clamping groove (41), the second connecting component comprises a second connecting groove arranged at the lower end of the left vertical rod (13), a second electromagnet is embedded in the inner top of the second connecting groove, a second clamping block is slidably connected in the second connecting groove, the second clamping block is elastically connected to the adjacent side of the second electromagnet through a second spring, and the upper end of the thin rod is provided with a second clamping groove.

7. The protective device for a car speaker according to claim 4, characterized in that: The first transmission assembly (11) comprises a first sprocket arranged on the right vertical rod (13) and two short rods (10), and the three first sprockets are connected by a first chain transmission. The second transmission assembly (12) comprises a second sprocket arranged on the left vertical rod (13) and two conveying rods (15), and the three second sprockets are connected by a second chain transmission. The third transmission assembly (23) comprises a third sprocket arranged on the cross rod (22) and the rotating rod (26), and the two third sprockets are connected by a third chain transmission. The fourth transmission assembly (24) comprises a fourth sprocket arranged on the corresponding two rotating rods (26), and the two fourth sprockets are connected by a fourth chain transmission.

8. The protective device for a car speaker according to claim 1, characterized in that: The inner walls of the adjacent sides of the two rectangular grooves (34) are both obliquely fixedly connected with electric heating plates (32); the inner tops of the two rectangular grooves (34) are both provided with a plurality of air holes (8); a constant temperature water tank (2) is installed on the left side of the shell (1); a circulating pump (3) is installed at the lower end of the shell (1); the liquid inlet end of the circulating pump (3) is connected to the bottom space of the constant temperature water tank (2) via a water inlet pipe (6); the liquid outlet end of the circulating pump (3) is connected to a water outlet pipe (4); the water outlet pipe (4) is connected to the right side of the constant temperature water tank (2) via a plurality of transverse pipes (37); and the plurality of transverse pipes (37) all penetrate the corresponding air inlets (7).

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