Drying device for vehicle lamp and vehicle lamp

Abstract

The utility model provides a drying device for a car lamp and the car lamp, the drying device comprises a shell, the shell comprises a first shell and a second shell, and an air hole of the car lamp is clamped between the first shell and the second shell; the humidity adjusting part is arranged in the shell so as to communicate or cut off external air; wherein the humidity adjusting part comprises a humidity spring, one end, close to external air, of the humidity spring is connected with a cover plate, and the humidity spring opens or closes the cover plate through stretching and retracting. The humidity sensing spring is designed to detect the humidity in the automobile lamp and automatically adjust the opening and closing of the silica gel cover plate, so that the humidity in the automobile lamp is controlled, the dew point temperature is reduced, and the generation of fog is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile lamps, in particular to a drying device for automobile lamps and the automobile lamps. Background Art

[0002] With the rapid development of the automotive industry, automotive lighting technology has also been continuously advancing. Car lights have evolved from halogen lamps to xenon lamps, and now to the widespread use of LED lights, all to meet the growing demand for automotive safety, comfort, and environmental protection. LED lights are popular for their high brightness, low energy consumption, long lifespan, and wide range of color options. However, their complex and compact structure can restrict internal air circulation. This can cause condensation inside the lamps in cold regions or when the temperature fluctuates rapidly, forming fog, which can affect lighting performance and driving safety.

[0003] To address this issue, the industry has proposed several solutions: First, using desiccants such as magnesium oxide, silica gel, and mineral desiccants, as well as chemical desiccants such as magnesium chloride and calcium chloride, to absorb excess moisture inside the headlights and maintain a dry environment. Second, applying anti-fog coating technology. This coating, composed of surfactants, hydrophilic groups, and hydrophobic groups, absorbs moisture from the air and combines with the hydrophilic groups to form a water film, thereby preventing moisture from condensing into water droplets. Third, optimizing the internal hot runner design of the headlights. By utilizing the pressure differential created by the heat generated by the lighting, this promotes the exchange of air between the headlights and the outside air, quickly dissipating fog and maintaining clear lighting effects.

[0004] However, existing technologies for addressing the fogging problem in headlights still have potential drawbacks. Desiccant needs to be replaced regularly to maintain its effectiveness, and certain chemicals may pose safety risks. Anti-fog coatings have durability issues, are expensive, and have a complex application process. Internal hot runner optimization designs are complex, increasing energy consumption and having limited effectiveness in extreme environments. Utility Model Content

[0005] The utility model aims to provide a novel drying device for a vehicle lamp and the vehicle lamp, thereby solving the above-mentioned problem.

[0006] To achieve the above-mentioned purpose, the utility model provides a drying device for a car lamp, comprising: a shell, the shell comprising a first shell and a second shell, and the air vent of the car lamp is clamped between the first shell and the second shell; a humidity regulating part, the humidity regulating part is arranged inside the shell to connect or cut off the outside air; wherein, the humidity regulating part includes a humidity spring, and a cover is connected to the end of the humidity spring close to the outside air, and the humidity spring is opened or closed by stretching and contracting.

[0007] The drying device provided by this utility model is installed on a vehicle lamp. By locating a humidity control unit within a housing, it can connect or block the lamp from the outside air according to the humidity inside the lamp. The lamp's air vent is snapped between the first and second housings to secure the drying device to the lamp. The humidity control unit includes a humidity spring that opens or closes a cover plate based on the actual humidity inside the lamp, thereby reducing the humidity and dew point temperature inside the lamp and thereby reducing the formation of fog.

[0008] In any of the above technical solutions, the first shell is connected to the first top plate, the humidity spring extends to drive the cover plate close to the first top plate for connecting to the outside air; the humidity spring contracts to drive the cover plate away from the first top plate for blocking the outside air.

[0009] The humidity spring can automatically expand or contract according to changes in ambient humidity. When the ambient humidity increases, the humidity spring expands, driving the cover toward the first top plate, thereby opening a passage to the outside world and allowing air circulation. Conversely, when the ambient humidity decreases, the humidity spring contracts, driving the cover away from the first top plate, closing the air passage and blocking air circulation. The position adjustment of the cover is directly controlled by the humidity spring, and the movement distance and direction of the cover are completely dependent on the expansion and contraction state of the humidity spring. The design of the humidity spring allows the drying device to automatically adjust air circulation according to changes in ambient humidity without the need for additional electricity or manual intervention, thereby improving operational convenience. Using a humidity spring to control the opening and closing of the cover simplifies the design and reduces the need for additional mechanical or electronic control systems, thereby reducing production and maintenance costs.

[0010] In any of the above technical solutions, the first top plate is provided with a breathable membrane.

[0011] By providing a breathable membrane on the first top plate, moisture is effectively expelled to the outside air, thereby enhancing air connectivity within the drying device, maintaining dryness within the device, and ultimately reducing the formation of fog. Specifically, when the humidity within the drying device reaches a certain level, the humidity spring will extend, pushing open the cover plate, and then the moisture inside the drying device will be expelled from the device through the cover plate to the first top plate, thereby achieving the purpose of dehumidification.

[0012] In any of the above technical solutions, the housing includes a plurality of clamping parts, which protrude in a direction away from the first housing surface, and the direction of the plane where the clamping parts are located is parallel to the axial direction of the housing.

[0013] The protruding design of the clamping portion makes the entire drying device easier to install and secure to the headlight. Specifically, when snapping the drying device into the headlight's air vent, the clamping portion allows the operator to quickly and easily insert and rotate the drying device to adjust it to the optimal position. Because the clamping portion is oriented parallel to the axial direction of the housing, this symmetrical and consistent design evenly distributes mechanical stress across the entire drying device, enhancing its structural stability and durability. The clamping portion's plane is aligned parallel to the axial direction of the housing, enhancing both ease of handling and overall aesthetics.

[0014] In any of the above technical solutions, the shell includes a plurality of clamping parts clamped with the vents, the clamping parts protrude in a direction away from the second shell surface, and the direction of the plane where the clamping parts are located is perpendicular to the axial direction of the shell.

[0015] The housing includes several clipping parts that snap into place with the air vents. These clipping parts protrude in a direction away from the second housing surface, and the direction of the plane where the clipping parts are located is perpendicular to the axial direction of the housing. This design facilitates effective integration with the housing's air vents, enhancing overall installation stability and functionality. Specifically, the clipping connection between the clipping parts and the air vents effectively ensures that the drying device is not easily displaced by vibration or external forces. The protruding design of the clipping parts and the layout perpendicular to the housing's axial direction help provide additional support points, ensuring a stable connection between the housing and the air vents, while also facilitating quick disassembly and assembly during installation or maintenance. Due to the design and position of the clipping parts, the drying device can be more easily installed or replaced when needed, reducing maintenance time and costs.

[0016] In any of the above technical solutions, a drying part is provided around the shell, and the drying part has a cavity structure.

[0017] A drying section is positioned around the outer shell. The cavity structure can be filled with a desiccant or a specific material to absorb or remove moisture physically or chemically. The cavity structure of the drying section is used to hold the desiccant, thereby absorbing moisture from within the headlight. To fully utilize the internal space of the drying unit, the interior of the clamping or mounting portion can be configured as a cavity structure for the drying section, increasing the desiccant capacity and thereby extending the service life of the drying unit.

[0018] In any of the above technical solutions, a sealing portion is provided on the surface of the shell, and the sealing portion and the vent hole abut against each other.

[0019] The sealing portion of the housing surface may be made of a flexible or elastic material to seal the vent. The sealing portion engages with the vent to prevent external moisture from entering the interior of the headlight, improving the lamp's sealing performance. This effectively protects internal components and reduces fogging even in environments with drastic humidity or temperature fluctuations. Furthermore, the tight fit between the sealing portion and the vent ensures the precise and effective adjustment of the humidity spring. Furthermore, the sealing portion also enhances the stability of the drying device assembly.

[0020] In any of the above technical solutions, the cover is made of silicone.

[0021] The cover is connected to the humidity spring, ensuring that it can move and open the cover. Because the humidity spring uses elasticity to open and close the cover, and the force exerted by the humidity spring is relatively small, silicone is chosen as the cover material. This ensures movement even with minimal spring force. Furthermore, due to its elasticity, the cover returns to its closed position when closed, ensuring a strong seal and effectively preventing moisture, dust, and other impurities from entering the headlight interior.

[0022] In any of the above technical solutions, the second shell is connected to the second top plate, and the second top plate is provided with a transparent film.

[0023] The second top plate is covered with a transparent film that allows light to pass through without affecting the visibility of the headlight. When the drying device is installed on the headlight, the film is attached to the second top plate, ensuring that the overall appearance of the headlight is not affected. Furthermore, if the desiccant in the drying device expires, the condition of the drying device can be easily inspected and replaced. The second top plate is located on the end of the outer shell away from the first top plate and is connected to the second outer shell. After the drying device is installed, the second top plate is located inside the headlight.

[0024] The utility model also provides a vehicle lamp, the air vents of which are equipped with the drying device as described above.

[0025] The vehicle lamp provided by this utility model is equipped with a drying device. The drying unit and humidity control unit work together to reduce the humidity inside the vehicle lamp, thereby lowering the dew point temperature and minimizing the possibility of fogging. The drying device comprises a breathable membrane attached to the surface of a first top plate, which is secured to the outer shell via a snap-fit ​​mechanism. The sealing unit is mounted on the outer shell, a second top plate is secured to the outer shell via a snap-fit ​​mechanism, a humidity spring is fixed within the outer shell and connected to the cover plate, a transparent membrane is attached to the surface of the second top plate, and a drying unit is provided around the outer shell to accommodate a desiccant.

[0026] After adopting the technical solution of the utility model, the following technical effects can be achieved:

[0027] (1) Humidity sensing spring control: By detecting the humidity inside the headlight and automatically adjusting the opening and closing of the silicone cover, the internal humidity is controlled, the dew point temperature is lowered, and the formation of fog is effectively reduced;

[0028] (2) Built-in desiccant: Desiccant is used to absorb moisture inside the lamp. Even after the desiccant expires, the humidity sensing spring can continue to maintain the appropriate humidity level.

[0029] (3) Easy to maintain and replace: The drying device is designed to be easy to disassemble and replace, making maintenance and updating of the desiccant simple and quick;

[0030] (4) Sealing function of the silicone cover: The silicone cover not only controls the internal humidity, but also prevents external water vapor and dust impurities from entering the interior of the headlight, playing a sealing and protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of a drying device provided in an embodiment of the present utility model;

[0032] Figure 2 A top view of a drying device provided in an embodiment of the present utility model;

[0033] Figure 3 A bottom view of a drying device provided in an embodiment of the present utility model;

[0034] Figure 4 for Figure 2 Cross-sectional view in the AA direction;

[0035] Figure 5 for Figure 2 Cross-sectional view in the AA direction;

[0036] Figure 6 for Figure 2 Cross-sectional view in the AA direction.

[0037] Description of reference numerals:

[0038] 100 - housing; 110 - first housing; 111 - first top plate; 112 - breathable membrane; 120 - second housing; 121 - second top plate; 122 - transparent membrane; 130 - clamping portion; 140 - clamping portion; 150 - drying portion; 160 - sealing portion; 200 - humidity regulating portion; 210 - humidity spring; 220 - cover plate. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] An embodiment of the present utility model provides a drying device for a vehicle lamp, comprising: a housing 100, the housing 100 comprising a first housing 110 and a second housing 120, the air vent of the vehicle lamp being snap-connected between the first housing 110 and the second housing 120; a humidity regulating unit 200, the humidity regulating unit 200 being arranged inside the housing 100 to connect or cut off the outside air; wherein the humidity regulating unit 200 comprises a humidity spring 210, the end of the humidity spring 210 close to the outside air being connected to a cover plate 220, and the humidity spring 210 is extended and retracted to open or close the cover plate 220.

[0041] like Figure 1 and Figure 4 As shown, the drying device provided by the present invention is installed on a vehicle lamp. By disposing a humidity control unit 200 within a housing 100, the device can be connected to or blocked from the outside air according to the humidity inside the vehicle lamp. The air vent of the vehicle lamp is snapped between the first housing 110 and the second housing 120 to secure the drying device to the vehicle lamp. The humidity control unit 200 includes a humidity spring 210 that opens or closes a cover 220 based on the actual humidity inside the vehicle lamp, thereby reducing the humidity and dew point temperature inside the vehicle lamp and thereby reducing the formation of fog.

[0042] Through the automatic expansion and contraction function of the humidity spring 210, the drying device can automatically adjust the internal air circulation according to the real-time environment without manual intervention, thereby improving the convenience and efficiency of use; by effectively controlling the humidity, fogging and condensation inside the headlights can be prevented, thereby maintaining the transparency and lighting effect of the headlights and improving driving safety; keeping the inside of the headlights dry can reduce corrosion of circuits and lamp components, thereby extending the overall service life of the headlights.

[0043] The material of the humidity spring 210 can be a hygroscopic material or a hygroscopic material. When the humidity in the environment changes, this material will absorb or release moisture, thereby changing the shape or elastic properties of the spring, allowing it to produce different deformations or stiffnesses under different humidity, thereby achieving the purpose of humidity regulation.

[0044] It should be noted that the first housing 110 and the second housing 120 can be provided separately or integrally.

[0045] In some embodiments of the present application, the first shell 110 is connected to the first top plate 111, and the humidity spring 210 extends to drive the cover plate 220 close to the first top plate 111 for connecting to the outside air; the humidity spring 210 contracts to drive the cover plate 220 away from the first top plate 111 for cutting off the outside air.

[0046] like Figure 1 and Figure 4As shown, the humidity spring 210 can automatically extend or contract according to changes in ambient humidity. When the ambient humidity increases, the humidity spring 210 extends, driving the cover plate 220 to move toward the first top plate 111, thereby opening a passage to the outside and allowing air circulation. Conversely, when the ambient humidity decreases, the humidity spring 210 contracts, driving the cover plate 220 away from the first top plate 111, closing the air passage and blocking air circulation. The position adjustment of the cover plate 220 is directly connected and controlled by the humidity spring 210, and the movement distance and direction of the cover plate 220 are completely dependent on the expansion and contraction state of the humidity spring 210. The design of the humidity spring 210 allows the drying device to automatically adjust the air circulation according to changes in ambient humidity without the need for additional electricity or manual intervention, thereby improving operational convenience. Using the humidity spring 210 to control the opening and closing of the cover plate 220 simplifies the design and reduces the need for additional mechanical or electronic control systems, thereby reducing production and maintenance costs.

[0047] The cover plate 220 may be provided with a locking portion, or the cover plate 220 may be fixedly connected to the humidity spring 210 to ensure that the cover plate 220 does not fall off or get lost when the humidity spring 210 drives the cover plate 220 toward the first top plate 111. Furthermore, the first top plate 111 is located outside the cover plate 220 and has a breathable portion. When the cover plate 220 is opened, air flows from the interior of the drying device through the opening in the cover plate 220 and reaches the breathable portion of the first top plate 111, thereby discharging moisture.

[0048] In some embodiments of the present application, the first top plate 111 is provided with a breathable membrane 112 .

[0049] like Figure 2 and Figure 4 As shown, by providing a breathable membrane 112 on the first top plate 111, moisture is effectively discharged to the outside air, thereby enhancing air connectivity within the drying device, maintaining dryness within the device, and ultimately reducing the generation of fog. Specifically, when the humidity within the drying device reaches a certain level, the humidity spring 210 will extend to push open the cover plate 220, and then the moisture inside the drying device will be discharged from the inside of the device through the cover plate 220 to the position of the first top plate 111, thereby discharging the moisture to the outside world and achieving the purpose of dehumidification. Those skilled in the art can select the appropriate material of the breathable membrane 112 according to actual needs.

[0050] In some embodiments of the present application, the housing 100 includes a plurality of clamping portions 130 , which protrude away from the surface of the first housing 110 , and the direction of the plane where the clamping portions 130 are located is parallel to the axial direction of the housing 100 .

[0051] like Figure 1 and Figure 6As shown, the protruding design of the clamping portion 130 makes it easier to install and fix the entire drying device on the headlight. Specifically, when the drying device is clamped to the air vent of the headlight, the operator can use the clamping portion 130 to quickly and conveniently embed and rotate the drying device to adjust it to the optimal position. Since the direction of the clamping portion 130 is parallel to the axial direction of the outer shell 100, this symmetrical and consistent design can evenly distribute mechanical stress on the entire drying device, thereby enhancing the structural stability and durability of the entire drying device. The direction of the plane where the clamping portion 130 is located is parallel to the axial direction of the outer shell 100, which improves the convenience of holding and the overall aesthetics. Preferably, there are at least two clamping portions 140, and more preferably, there are six clamping portions 140. Those skilled in the art can design the specific shape and size of the clamping portion 140 according to their own needs.

[0052] In some embodiments of the present application, the shell 100 includes several snap-fitting portions 140 snap-fitted to the vent holes. The snap-fitting portions 140 protrude away from the surface of the second shell 120 , and the direction of the plane where the snap-fitting portions 140 are located is perpendicular to the axial direction of the shell 100 .

[0053] like Figure 1 and Figure 5 As shown, the housing 100 includes a plurality of clipping parts 140 that are clipped into the air vents. These clipping parts 140 protrude in a direction away from the surface of the second housing 120, and the direction of the plane where the clipping parts 140 are located is perpendicular to the axial direction of the housing 100. This design facilitates effective integration with the air vents of the housing 100, thereby enhancing the overall installation stability and functionality. Specifically, the clipping method of the clipping parts 140 and the air vents can effectively ensure that the drying device is not easily displaced due to vibration or external force; the protruding design of the clipping parts 140 and the layout perpendicular to the axial direction of the housing 100 help provide additional support points, ensuring a stable connection between the housing 100 and the air vents, while also facilitating quick disassembly and assembly during installation or maintenance; due to the design and position of the clipping parts 140, the drying device can be more easily installed or replaced when needed, reducing maintenance time and costs.

[0054] It should be noted that the clip portion 140 can be designed to abut against the inner wall of the lamp's air vent to achieve securement. Furthermore, a groove can be provided within the air vent to mate with the clip portion 140. The interlocking engagement between the clip portion 140 and the clip portion 140 further secures the drying device. The clip portion 140 can be rotated in only one direction to facilitate removal and replacement.

[0055] In some embodiments of the present application, a drying portion 150 is provided around the housing 100 , and the drying portion 150 has a cavity structure.

[0056] like Figure 6As shown, a drying section 150 is disposed around the housing 100. The cavity structure can be filled with a desiccant or utilizes specific materials to absorb or remove moisture through physical or chemical means. The cavity structure of the drying section 150 is used to accommodate the desiccant, thereby absorbing moisture from within the headlight. To fully utilize the internal space of the drying device, the interior of the clamping portion 130 or the clamping portion 140 can be configured as the cavity structure of the drying section 150, increasing the desiccant capacity and thereby extending the service life of the drying device.

[0057] In some embodiments of the present application, a sealing portion 160 is provided on the surface of the housing 100 , and the sealing portion 160 abuts against the vent hole.

[0058] like Figure 1 、 Figure 5 and Figure 6 As shown, the sealing portion 160 on the surface of the housing 100 may be made of a flexible or elastic material and is used to seal the ventilation hole. The sealing portion 160 can interlock with the ventilation hole to prevent external moisture from entering the interior of the headlight, improving the sealing performance of the headlight. Even in environments with drastic humidity or temperature fluctuations, it can effectively protect internal components and reduce the generation of fog. In addition, the close fit between the sealing portion 160 and the ventilation hole can ensure the precise and effective adjustment of the humidity spring 210. Furthermore, the sealing portion 160 also improves the stability of the drying device assembly.

[0059] The sealing portion 160 can be fixedly or detachably mounted on the housing 100. Preferably, the sealing portion 160 is made of rubber or silicone. Rubber sealing rings have excellent elasticity and sealing properties, while silicone sealing rings have excellent high-temperature and chemical resistance. Preferably, the portion of the sealing portion 160 that contacts the vent hole is arc-shaped to facilitate installation and removal of the drying device.

[0060] It should also be noted that an annular wall can be provided between the sealing portion 160 and the clamping portion 130. The annular wall protrudes along the circumferential direction of the outer shell 100 and abuts against the peripheral wall of the air vent, thereby limiting the drying device and ensuring that the drying device can be installed in a suitable position.

[0061] In some embodiments of the present application, the cover plate 220 is made of silicone.

[0062] The cover plate 220 is connected to the humidity spring 210, ensuring that the humidity spring 210 can drive the cover plate 220 to move, thereby achieving the opening or closing of the cover plate 220. Since the humidity spring 210 uses elasticity to open or close the cover plate 220, and the humidity spring 210 can exert a relatively small force on the cover plate 220, silicone is chosen as the material for the cover plate 220. This allows the cover plate 220 to move even with the smallest force from the humidity spring 210. Furthermore, due to the certain elasticity of the cover plate 220, when closed, it can stably return to the closed state, ensuring a good sealing performance, thereby effectively preventing external moisture, dust, and impurities from entering the interior of the headlight, thus providing a good seal.

[0063] In addition, the cover 220 made of silicone material can maintain its stable performance under extreme environmental conditions, such as not deforming or cracking in high or low temperature environments; silicone has excellent chemical stability and aging resistance, and can be used for a long time without being easily damaged, thereby improving the overall durability and reliability of the device; silicone has good sealing properties and can effectively prevent moisture and dust from entering the interior of the device.

[0064] In some embodiments of the present application, the second housing 120 is connected to a second top plate 121 , and the second top plate 121 is provided with a transparent film 122 .

[0065] like Figure 1 and Figure 3 As shown, the second top plate 121 is provided with a transparent film 122. This allows light to pass through without affecting the visibility of the headlight. When the drying device is installed on the headlight, the transparent film 122 is attached to the second top plate 121, ensuring that the overall appearance of the headlight is not affected. Furthermore, if the desiccant in the drying device becomes ineffective, the condition of the drying device can be more intuitively checked and replaced. The second top plate 121 is located on the end of the housing 100 away from the first top plate 111 and is connected to the second housing 120. After the drying device is installed, the second top plate 121 is located inside the headlight.

[0066] It should also be noted that a plurality of holes are provided on the transparent film 122 to ensure that the fog in the headlight can be absorbed by the drying device in a timely manner. Those skilled in the art can design the shape of the holes according to needs.

[0067] An embodiment of the present invention further provides a vehicle lamp, wherein the air vents of the vehicle lamp are equipped with the drying device as described above.

[0068] The vehicle lamp provided by the present invention is equipped with a drying device. The drying unit 150 and humidity control unit 200 work together to reduce the humidity inside the vehicle lamp, thereby lowering the dew point temperature and minimizing the possibility of fogging. The drying device comprises a breathable membrane 112 attached to the surface of a first top plate 111. The first top plate 111 is secured to the housing 100 via a snap-fit ​​mechanism. A sealing unit 160 is mounted on the housing 100. A second top plate 121 is secured to the housing 100 via a snap-fit ​​mechanism. A humidity spring 210 is secured to the interior of the housing 100 and connected to a cover plate 220. The transparent membrane 122 is attached to the surface of the second top plate 121. The drying unit 150 is positioned around the housing 100 to accommodate a desiccant.

[0069] Specifically, the cooperation relationship between the air vents of the headlights and the drying device is that the drying device is installed on the air vents to form an enclosed space; the desiccant inside the drying section 150 will absorb moisture inside the headlight, lower the dew point temperature, and prevent fogging; if the humidity inside the headlight is low enough, the humidity spring 210 will not open the cover 220 to prevent external moisture from entering the headlight; when the desiccant fails, external moisture enters the headlight through other gaps. When the humidity inside the headlight reaches a certain level, the humidity spring 210 will push open the cover 220 to allow the moisture inside the headlight to be discharged into the outside air, thereby reducing the humidity inside the headlight; after the desiccant fails, it can also be removed and replaced with a new drying device that intelligently controls the humidity inside the headlight.

[0070] Although the present invention is disclosed as above, it is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope defined by the claims.

Claims

1. A drying device for vehicle lamps, characterized in that: include: A housing (100), the housing (100) comprising a first housing (110) and a second housing (120), the air vent of the vehicle lamp being snap-connected between the first housing (110) and the second housing (120); a humidity regulating unit (200), the humidity regulating unit (200) being arranged inside the housing (100) to communicate with or block external air; The humidity regulating portion (200) comprises a humidity spring (210), an end of the humidity spring (210) close to the outside air is connected to a cover plate (220), and the humidity spring (210) opens or closes the cover plate (220) by expanding or contracting.

2. The drying device according to claim 1, characterized in that The first housing (110) is connected to a first top plate (111); the humidity spring (210) extends to drive the cover plate (220) closer to the first top plate (111) for communicating with outside air; and the humidity spring (210) contracts to drive the cover plate (220) away from the first top plate (111) for blocking outside air.

3. The drying device according to claim 2, characterized in that The first top plate (111) is provided with a breathable membrane (112).

4. The drying device according to claim 1, characterized in that The housing (100) comprises a plurality of clamping portions (130), wherein the clamping portions (130) protrude in a direction away from the surface of the first housing (110), and the direction of the plane where the clamping portions (130) are located is parallel to the axial direction of the housing (100).

5. The drying device according to claim 1, characterized in that The housing (100) comprises a plurality of clamping portions (140) clamped to the air vents, the clamping portions (140) protruding in a direction away from the surface of the second housing (120), and the direction of the plane where the clamping portions (140) are located is perpendicular to the axial direction of the housing (100).

6. The drying device according to claim 1, characterized in that A drying portion (150) is provided around the housing (100), and the drying portion (150) has a cavity structure.

7. The drying device according to claim 1, characterized in that A sealing portion (160) is provided on the surface of the housing (100), and the sealing portion (160) abuts against the vent hole.

8. The drying device according to claim 1, characterized in that The material of the cover plate (220) is silicone.

9. The drying device according to claim 1, characterized in that The second housing (120) is connected to a second top plate (121), and the second top plate (121) is provided with a transparent film (122).

10. A vehicle lamp, characterized in that: The air vent of the vehicle lamp is equipped with a drying device according to any one of claims 1 to 9.

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