Defogging device and vehicle lamp assembly

Abstract

The application provides a defogging device and a vehicle lamp assembly, comprising a main body, a blocking mechanism, a moisture absorbing and releasing element, a heating device and a deformation element. The main body is formed with a mounting cavity, an air inlet hole and an air outlet hole which are communicated with the mounting cavity. The blocking mechanism is rotatably connected to the main body. The blocking mechanism has a first position and a second position. In the first position, the blocking mechanism blocks the air outlet hole. In the second position, the blocking mechanism blocks the air inlet hole. The deformation element has an initial state and a first deformation state which is deformed after heating. In the initial state, the blocking mechanism is in the first position. In the first deformation state, the blocking mechanism is in the second position. The deformation element only relies on its physical deformation such as thermal expansion and contraction and thermal bending to generate sufficient force to drive the blocking mechanism to rotate, so as to realize normal water vapor adsorption and moisture discharge when heated.

Description

Technical Field

[0001] This application relates to the field of automotive lighting technology, and more particularly to a defogging device and automotive lighting assembly. Background Technology

[0002] Headlight fogging is generally caused by a large temperature difference between the inside and outside of the headlight cover. Water vapor condenses in the cooler areas of the headlight cover, resulting in fogging.

[0003] In related technologies, ventilation holes are usually set on vehicle lights to release moisture, but during rain, there is a risk that water vapor can enter the light through the ventilation holes. Utility Model Content

[0004] This application provides a defogging device and a vehicle lamp assembly to improve the risk of water vapor entering the lamp through vents in related technologies.

[0005] In a first aspect, a defogging device is provided for vehicle lights, comprising: The main body has an installation cavity and a first air inlet and a second air outlet communicating with the installation cavity; A blocking mechanism is rotatably connected to the main body. The blocking mechanism has a first position and a second position. In the first position, the blocking mechanism blocks the air outlet, and in the second position, the blocking mechanism blocks the air inlet. A moisture-absorbing / discharging component is disposed within the mounting cavity; A heating device for heating the cavity inside the mounting chamber; A deformable element, at least partially disposed within the mounting cavity and connected to the sealing mechanism, is used to drive the sealing mechanism to rotate relative to the main body when the heating device is working. The deformable element has an initial state and a first deformation state after heating. In the initial state, the sealing mechanism is in the first position, and in the first deformation state, the sealing mechanism is in the second position.

[0006] The defogging device of this application embodiment constructs a fully closed-loop active dehumidification logic through the combination of a moisture-absorbing and desiccant component, a heating device, an airflow channel (air inlet and air outlet), and a sealing mechanism. This logic can adapt well to the modified sealing position. Under normal conditions, the sealing mechanism is in the first position, blocking the air outlet and opening the air inlet. The moisture-absorbing and desiccant component continuously absorbs water vapor in the lamp cavity through the air inlet, directly reducing the water vapor concentration in the lamp cavity and preventing water vapor from condensing into fog on the inner wall of the lamp cover from the source. When the moisture-absorbing and desiccant component is saturated, the heating device triggers the deformation component to deform, and the sealing mechanism switches to the second position, blocking the air inlet and opening the air outlet. The moisture-absorbing and desiccant component releases water vapor under heating, and the water vapor is quickly discharged to the outside through the air outlet, while simultaneously completing its own regeneration. This allows for the one-way discharge of moisture from the headlights, effectively solving the problems of repeated moisture intrusion and fogging in traditional solutions. Furthermore, the moisture absorption and release components are reusable and can maintain high-efficiency dehumidification capabilities for a long time, achieving long-term anti-fogging for the headlights.

[0007] One end of the deformable component forms a tight thermal contact with the heating device, enabling it to quickly receive heat conducted by the heating device. The other end forms a fixed connection with the sealing mechanism, possessing stable thermo-induced deformation physical characteristics. This component has two stable physical states: an initial state and a first deformation state after heating, where directional deformation occurs. The deformation state exhibits a precise positive correlation with changes in ambient temperature. It achieves a unidirectional conversion of thermal energy into mechanical energy without requiring any electrical control, motors, or other power structures. Relying solely on its own thermal expansion and contraction, and thermo-induced bending, it generates sufficient force to drive the sealing mechanism to achieve precise rotational displacement relative to the main body, thereby enabling stable switching between the first and second positions of the sealing mechanism.

[0008] In some embodiments, the deformable element is a metal sheet that extends along a first direction, and one end of the deformable element is connected to the sealing mechanism at an installation point, wherein the radial direction of the installation point forms an angle with the first direction.

[0009] In the above embodiments, the blocking mechanism's motion is a rotational motion around the main body, requiring rotational torque; while the deformation of the metal sheet extending along the first direction is a linear expansion and contraction deformation, generating a linear thrust or pull force along the first direction. Since the radial direction of the mounting point is set at an angle to the first direction, the linear deformation force of the metal sheet along the first direction is decomposed through the mounting point at the angle into an effective component perpendicular to the radial direction of the blocking mechanism's rotation and an ineffective component along the radial direction. The effective component is directly converted into torque to drive the blocking mechanism's rotation, allowing the linear deformation of the metal sheet to directly and effectively drive the circumferential rotation of the blocking mechanism. Preferably, the radial direction of the mounting point is perpendicular to the first direction, thus almost eliminating ineffective separation along the radial direction, and the linear deformation force is mostly an effective component perpendicular to the radial direction of the blocking mechanism's rotation.

[0010] In some embodiments, the deformable element includes: First metal sheet; The second metal sheet is at least partially attached to the first metal sheet, and the second metal sheet is closer to the rotation axis of the sealing mechanism than the first metal sheet. The second metal sheet is connected to the heating device. The coefficient of thermal expansion of the second metal sheet is less than that of the first metal sheet.

[0011] In the above embodiment, when the heating device is working, the second metal sheet is heated. The two metal layers of the bimetallic sheet are heated at the same time. The metal layer with a larger coefficient of thermal expansion will elongate more, while the metal layer with a smaller coefficient of thermal expansion will elongate less. The difference in elongation between the two metal layers forms a unidirectional and directional bending deformation force, which pushes the bimetallic sheet to undergo arc-shaped bending deformation towards the side with a smaller coefficient of thermal expansion. This deformation force will accumulate at the end, forming a super large deformation and super strong driving force at the end, which is converted into rotational torque, driving the sealing mechanism to rotate from the first position to the second position. The bimetallic strip's reset is an active stress rebound. The reset force of the bimetallic strip is not simply the elasticity of the metal, but a rigid rebound thrust formed by the stress difference of the thermal expansion and contraction of the two metal layers. It is a strong reset driving force. The strong rebound force at the end of the bimetallic strip can easily overcome the rotational damping and accurately push the sealing mechanism from the second position back to the first position, tightly sealing the vent.

[0012] In some embodiments, the heating device includes: First conductive element; The second conductive element; and, Electrode heating element, connected to the sealing mechanism; Both the first conductive element and the second conductive element are electrically connected to the electrode heating plate, and the first conductive element is also connected to the second metal plate.

[0013] In the above embodiment, the first conductive element and the second conductive element are the dual power supply terminals of the electrode heating element, providing stable power to the heating element, which is the basis for heating. The first conductive element not only supplies power to the electrode heating element, but also is rigidly connected to the second metal sheet, directionally conducting the heat of the electrode heating element to the second metal sheet, while providing fixed support for the second metal sheet. Thus, there are no extra connecting parts or fixing parts, and the volume of the entire structure is compressed to a minimum, which can be easily embedded in the vehicle lamp.

[0014] In some embodiments, the first conductive element and the second metal sheet are integrally formed.

[0015] In the above embodiments, the first conductive element and the second metal sheet have no seams or connecting medium. The first conductive element and the second metal sheet are integral structures of the same metal. The thermal conductivity of the metal is continuous and lossless. The heat generated by the electrode heating plate is conducted from the first conductive element to the second metal sheet with zero heat loss and almost no conduction delay. The heat is instantly, uniformly, and completely transferred to the entire second metal sheet, and then synchronously transferred to the attached first metal sheet.

[0016] In some embodiments, the heating device includes: The first conductive element includes a first substrate and a first conductive cantilever connected to each other, wherein the first conductive cantilever is disposed at an angle to the first substrate; The second conductive element includes a second substrate and a second conductive cantilever connected to each other, the second conductive cantilever being disposed at an angle to the second substrate; and... Electrode heating element, connected to the sealing mechanism; Both the first conductive cantilever and the second conductive cantilever are electrically connected to the electrode heating plate, and the extension directions of the first conductive cantilever and the second conductive cantilever intersect the rotation axis of the sealing mechanism.

[0017] In the above embodiments, the first substrate and the second substrate are rigid structures, serving as rigid supports and fixing bases for the entire conductive component. They possess sufficient structural strength and can be stably and firmly fixed to the mounting position of the main body. They will not shift or deform due to vibration or external forces, providing stable installation support and a rigid conductive base for the entire heating device and ensuring the physical stability of the power supply.

[0018] The first and second conductive cantilever arms are flexible functional segments, and are set at an angle to the corresponding first and second substrates, respectively. The first and second conductive cantilever arms are the core components for achieving electrical connection with the electrode heating element. The angled design allows the first and second conductive cantilever arms to naturally form elastic deformation margin and movement space. Unlike the rigid conductive structure with direct connection, the angled cantilever arms have elastic and flexible characteristics, perfectly adapting to the rotation of the sealing mechanism and avoiding rigid bending.

[0019] In some embodiments, the blocking mechanism includes: A rotating body, comprising a central frame and first and second baffles spaced circumferentially along the central frame, both connected to the central frame. The first baffle has a first through hole, and the second baffle has a second through hole. In the first position, the first baffle blocks the air outlet, and the second through hole communicates with the air inlet. In the second position, the second baffle blocks the air inlet, and the first through hole communicates with the air outlet. A connector is disposed on the outer periphery of the rotating body, connected to the deformable component, and connected to one of the first baffle and the second baffle; The moisture absorption and release component is connected to the central frame.

[0020] In the above embodiment, the two baffles are distributed circumferentially along the central frame, forming a complementary sealing structure. In the first position, the first baffle precisely blocks the air outlet, and the second through hole of the second baffle is aligned with the air inlet, achieving air intake conduction and air outlet sealing. The moisture in the lamp cavity enters through the air inlet and works with the moisture absorption and release components to complete moisture absorption. In the second position, the second baffle precisely blocks the air inlet, and the first through hole of the first baffle is aligned with the air outlet, achieving air outlet conduction and air intake sealing. The moisture is discharged through the air outlet, completing the dehumidification. The rotating body only needs to perform a single rotation around the central frame to complete the switching from the moisture absorption mode to the dehumidification mode, without the need for multi-component linkage or complex transmission structure.

[0021] In some embodiments, the defogging device further includes: A first sealing strip, wherein the first sealing strip is disposed between the vent and the first baffle, and the first sealing strip has a first communicating hole communicating with the vent; and The second sealing strip is disposed between the air inlet and the second baffle, and the second sealing strip has a second connecting hole that communicates with the air inlet.

[0022] In the above embodiments, the first sealing strip is a dedicated sealing gasket for the air outlet, and the second sealing strip is a dedicated sealing gasket for the air inlet. The sealing strips are made of elastic material (silicone, rubber, or foam) and are tightly clamped between the end face of the air outlet and the end face of the first baffle, the end face of the air inlet, and the end face of the second baffle. They undergo elastic compression deformation, fill the gaps, and form a gapless sealing surface. The first sealing strip and the second sealing strip are independently arranged to ensure good sealing in the first and second blocking states.

[0023] In some embodiments, the main body further forms a filter cavity, one end of which is connected to the air outlet, and the other end of which is provided with a breathable, waterproof and dustproof membrane.

[0024] In the above embodiment, during the heating and dehumidification stage, the vent is open, and the moisture in the mounting cavity enters the filter cavity through the vent. It is then smoothly discharged to the outside atmosphere through the breathable, waterproof and dustproof membrane. Rainwater, dust, mud, debris and other external substances are completely blocked outside the filter cavity by the waterproof and dustproof membrane, preventing them from entering the filter cavity or flowing back into the mounting cavity, thus ensuring the reliability of the vehicle lights and the defogging device.

[0025] Secondly, a vehicle lighting assembly is provided, including a vehicle light and the aforementioned defogger. The vehicle light includes a lamp housing and a lamp cover, the lamp housing and the lamp cover are connected and form a lamp cavity, the lamp housing has an installation port for connecting to the lamp cavity, and the main body is fitted into the installation port. Attached Figure Description

[0026] Figure 1 This is an exploded structural diagram of the defogging device provided in the embodiments of this application; Figure 2 This is a schematic diagram of the internal structure of the defogging device provided in the embodiments of this application; Figure 3 yes Figure 2 A schematic diagram of the structure from another perspective shown; Figure 4 yes Figure 1 A schematic diagram of the structure from another perspective shown; Figure 5 yes Figure 4 A schematic cross-sectional view of the blocking mechanism at point AA in the first position of the structure shown; Figure 6 yes Figure 4 The diagram shows a cross-sectional view of the sealing mechanism at point AA in the second position.

[0027] Explanation of reference numerals in the attached figures: 1. Defogging device; 10. Main body; 10a. Mounting cavity; 10b. Air inlet; 10c. Air outlet; 10d. Filter cavity; 11. Breathable, waterproof and dustproof membrane; 20. Sealing mechanism; 21. Rotating body; 211. Central frame; 212. First baffle; 212a. First through hole; 213. Second baffle; 213a. Second through hole; 22. Connecting component; 30. Moisture absorption and release components; 50. Heating device; 51. First conductive element; 511. First substrate; 512. First conductive cantilever; 52. Second conductive element; 521. Second substrate; 522. Second conductive cantilever; 53. Electrode heating element; 60. Deformable component; 61. First metal sheet; 62. Second metal sheet; 70. First sealing strip; 70a. First connecting hole; 80. Second sealing strip; 80a. Second connecting hole. Detailed Implementation

[0028] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0029] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0030] Headlight fogging is generally caused by a large temperature difference between the inside and outside of the headlight housing. Water vapor condenses in the cooler areas of the headlight housing, resulting in fogging. Specifically, as the engine provides heat to the headlights and the taillights are exposed to sunlight, the temperature inside the lamp cavity rises. This creates a pressure difference between the inside and outside of the lamp, accelerating the exchange of air between the inside and outside of the lamp. Moist air from the outside enters the lamp, and water vapor condenses in the cooler areas of the headlight housing, causing fogging.

[0031] In related technologies, ventilation holes are usually set on vehicle lights to release moisture, but during rain, there is a risk that water vapor can enter the light through the ventilation holes.

[0032] To resolve the above issues, please refer to [link / reference]. Figures 1 to 3 This application provides a defogging device 1 for vehicle lights, including a main body 10, a sealing mechanism 20, a moisture absorption and release component 30, a heating device 50, and a deformation component 60.

[0033] Specifically, please refer to Figures 4 to 6The main body 10 has an installation cavity 10a and an air inlet 10b and an air outlet 10c connected to the installation cavity 10a. The main body 10 is the basic supporting component of the entire defogger 1 and the mounting carrier for all parts. Its core design lies in the integrally formed installation cavity 10a, air inlet 10b, and air outlet 10c, which form an interconnected cavity and airflow channel, providing the physical basis for the circulation of water vapor inside the lamp and for dehumidification and dehumidification. One end of the air inlet 10b is sealed to the inside of the lamp cavity, while one end of the air outlet 10c is connected to the external atmosphere of the lamp. The installation cavity 10a provides a sealed and independent working space for the linkage of the moisture absorption / desorption component 30, the deformation component 60, and the sealing mechanism 20, while simultaneously isolating the functional components from the lamp beads, circuit boards, and other core components inside the lamp, preventing interference or damage to the core components of the lamp during operation.

[0034] The mounting cavity 10a structure of the main body 10 provides a protective enclosure for the moisture absorption and discharge component 30 and the heating device 50, which can reduce heat loss from the heating device 50 and improve heating efficiency. At the same time, the main body 10 generally adopts a rigid structural frame, which can protect the entire device and prevent vibration, dust, and mud from causing wear or blockage to the internal precision components during vehicle operation, ensuring long-term stable operation of the device. The independent channel design of the air inlet 10b and the air outlet 10c realizes the unidirectional flow and partitioning of airflow inside the lamp and outside airflow, providing a structural prerequisite for the bidirectional sealing of the subsequent sealing mechanism 20.

[0035] The blocking mechanism 20 is rotatably connected to the main body 10. The blocking mechanism 20 has a first position and a second position. In the first position, the blocking mechanism 20 blocks the air outlet 10c. In the second position, the blocking mechanism 20 blocks the air inlet 10b.

[0036] The sealing mechanism 20 is a rotatable opening and closing component connected to the main body 10. Its core is that it has a unique first position and a second position, and the two positions are mutually exclusive. Through its own rotational displacement, it can achieve precise and alternating sealing of the air inlet 10b and the air outlet 10c without any intermediate leakage. Structurally, it achieves the effect that the airflow channel between the lamp cavity and the outside is only connected in one direction at the same time.

[0037] like Figure 5 As shown, when in the first position: the sealing mechanism 20 rotates to precisely fit and completely seal the air outlet 10c. At this time, the air outlet 10c is in a completely closed and sealed state, while the air inlet 10b remains in a completely open state. The airflow channel between the lamp cavity inside the headlight and the mounting cavity 10a of the defrosting device 1 is unobstructed, while the airflow channel between the mounting cavity 10a and the outside atmosphere is completely cut off. like Figure 6As shown, when in the second position: after the sealing mechanism 20 completes the rotational displacement under the action of external force, it precisely fits and completely seals the air inlet 10b. At this time, the air inlet 10b is in a completely closed and sealed state, while the air outlet 10c remains in a completely open state. The airflow channel between the mounting cavity 10a of the defogger 1 and the outside atmosphere is unobstructed, while the airflow channel between the lamp cavity inside the headlight and the mounting cavity 10a is completely cut off.

[0038] The moisture absorption and release component 30 (also known as a humidity regulating component) is located within the installation cavity 10a. Its core attribute is its reversible and highly efficient moisture absorption and release physical properties. This moisture absorption and release component 30 can be made of specialized moisture-absorbing materials such as molecular sieves, composite moisture-absorbing silica gel, and superabsorbent resin. Under normal temperature and without external heating, it can efficiently and quickly adsorb free water vapor in the surrounding environment and solidify and store the gaseous water vapor in its internal structure. Under the heating effect of the heating device 50, it can quickly desorb and release the adsorbed and stored water molecules, converting them back into gaseous water vapor. This achieves a cycle of moisture absorption, moisture release, regeneration, and re-absorption, eliminating the need for periodic replacement and providing long-term continuous water vapor treatment.

[0039] The working state of the moisture absorption and desiccation component 30 is perfectly matched with the fogging condition of the headlights. The essence of headlight fogging is that the water vapor content in the lamp cavity is too high. When the water vapor encounters cold, it condenses on the inner wall of the lamp cover. The moisture absorption and desiccation component 30 can continuously absorb and reduce the amount of water vapor in the lamp cavity through its own moisture absorption capacity, directly reducing the water vapor concentration in the lamp cavity and reducing the condensation conditions of water vapor from the root, thus achieving passive dehumidification and active anti-fogging under normal conditions. When the moisture absorption and desiccation component 30 reaches saturation, it can quickly release moisture by heating the heating device 50. While releasing water vapor, it also completes its own regeneration and restores its moisture absorption capacity, solving the drawbacks of traditional disposable desiccants that fail after adsorption saturation and require disassembly and replacement of the headlights.

[0040] The heating device 50 is used to heat the mounting cavity 10a. Its core function is to uniformly and stably heat the mounting cavity 10a of the demisting device 1. On the one hand, the heat generated by heating can directly increase the ambient temperature of the moisture absorption and release component 30, accurately triggering the moisture release characteristics of the moisture absorption and release component 30, allowing the moisture absorption and release component 30 to quickly release the adsorbed and stored water vapor into gaseous water vapor, completing the regeneration of the moisture absorption component. On the other hand, heating can increase the temperature of the air in the mounting cavity 10a. The hot air has stronger fluidity, providing sufficient airflow power for the subsequent water vapor discharge. At the same time, there are no low-temperature areas in the heated cavity, which can effectively prevent the released water vapor from secondary condensation in the mounting cavity 10a, ensuring the thoroughness of the dehumidification process and leaving no residual water stains or water mist.

[0041] The heating power and temperature of the heating device 50 have been precisely calibrated to fully adapt to the operating conditions and material tolerances of the vehicle lights. Its heating temperature is precisely controlled within a safe range that triggers the moisture release of the absorbent / desorbent component 30 and the deformation of the deformation component 60, without causing thermal damage to the plastic housing, circuit board, and LED chips of the vehicle lights. It features low power consumption, low heat radiation, and resistance to high-temperature aging. Understandably, the heating device 50 can be directly connected to the vehicle's power supply system, starting and stopping synchronously with the vehicle lights, or it can operate independently without increasing the power load on the vehicle lights, combining adaptability and safety.

[0042] The deformable element 60 is at least partially disposed in the mounting cavity 10a and connected to the sealing mechanism 20. It is used to drive the sealing mechanism 20 to rotate relative to the main body 10 when the heating device 50 is working. The deformable element 60 has an initial state and a first deformation state after heating. In the initial state, the sealing mechanism 20 is in a first position, and in the first deformation state, the sealing mechanism 20 is in a second position.

[0043] The deformable component 60 has at least a portion of its structure extending into the mounting cavity 10a. One end forms a tight thermal contact with the heating device 50, enabling it to quickly receive heat conducted by the heating device 50. The other end forms a fixed connection with the sealing mechanism 20, possessing stable thermo-induced deformation physical characteristics. This component has two stable physical states: an initial state and a first deformation state after heating, where directional deformation occurs. The deformation state is precisely positively correlated with changes in ambient temperature. It achieves a unidirectional conversion of thermal energy into mechanical energy without requiring any electrical control, motor, or other power structures. Relying solely on its own thermal expansion and contraction, and thermo-induced bending, it can generate sufficient force to drive the sealing mechanism 20 to complete a precise rotational displacement relative to the main body 10, thereby achieving stable switching between the first and second positions of the sealing mechanism 20.

[0044] In the initial state: the deformable part 60 is not subjected to the heat of the heating device 50, and maintains its original physical shape without any deformation. At this time, the initial force of the deformable part 60 will drive the sealing mechanism 20 to be stably in the first position, and accurately complete the sealing of the air outlet 10c. In the first deformation state: the heating device 50 starts working and continuously releases heat. The heat is quickly conducted to the deformable part 60 and causes it to undergo directional physical deformation. The force generated by the deformation will drive the sealing mechanism 20 to complete a precise rotation relative to the main body 10 until the sealing mechanism 20 is stably in the second position, and the air inlet 10b is precisely sealed.

[0045] In this embodiment, a closed-loop active dehumidification logic is constructed by combining the moisture-absorbing / de-absorbing element 30, the heating device 50, the airflow channel (air inlet 10b and air outlet 10c), and the sealing mechanism 20. This logic can effectively adapt to the modified sealing position. Under normal conditions, the sealing mechanism 20 is in the first position, blocking the air outlet 10c and opening the air inlet 10b. The moisture-absorbing / de-absorbing element 30 continuously absorbs water vapor in the lamp cavity through the air inlet 10b, directly reducing the water vapor concentration in the lamp cavity and preventing water vapor from condensing into fog on the inner wall of the lamp cover from the source. When the moisture-absorbing / de-absorbing element 30 is saturated, the heating device 50 triggers the deformation element 60 to deform, and the sealing mechanism 20 switches to the second position, blocking the air inlet 10b and opening the air outlet 10c. The moisture-absorbing / de-absorbing element 30 releases water vapor under heating, and the water vapor is quickly discharged to the outside through the air outlet 10c, while simultaneously completing its own regeneration. This achieves a one-way discharge of water vapor from the headlights, effectively solving the problem of repeated water vapor intrusion and condensation in traditional solutions. Furthermore, the moisture absorption and release components are recyclable and can maintain high-efficiency dehumidification capabilities for a long time, thus achieving long-term anti-fogging for the headlights.

[0046] On the other hand, all the logic of the defogging device 1 in this application can also be developed around the actual operating conditions of the vehicle lights. Fogging of the vehicle lights, changes in air pressure, and changes in temperature are all natural physical laws. The revised sealing position and linkage logic make the working mode of the defogging device 1 completely fit and accurately adapt to these laws. When the vehicle lights are working (engine heats up, headlights are on, sunlight shines), the temperature inside the lamp cavity rises and the amount of water vapor evaporation increases. The heating device 50 of this device works synchronously and automatically enters the dehumidification and regeneration state to remove excess water vapor in time. After the vehicle lights are turned off, the temperature inside the lamp cavity drops rapidly, which easily forms a negative pressure to absorb moisture. The device stops heating and automatically resets, entering the moisture absorption and anti-fogging state to prevent the intrusion of external water vapor. In high humidity environments such as rainy days and car washes, the device is in the moisture absorption and anti-fogging state, and the vent 10c is blocked to prevent the intrusion of rainwater and humid air. When the air pressure inside the lamp cavity rises, the vent 10c can release pressure, and when the air pressure drops, it can avoid negative pressure to absorb moisture. This adaptive design allows the device to accurately perform its core functions of defogging, anti-fogging, and waterproofing in any usage scenario of the vehicle lights.

[0047] Furthermore, the defogging device 1 in this application, in addition to achieving the core functions of efficient defogging and dehumidification, also retains and optimizes the function of air pressure balance. The air inlet 10b and air outlet 10c always maintain a single, continuous channel. When the headlight heats up, hot air inside the lamp cavity can enter the device through the continuous air inlet 10b to release pressure; when the headlight cools down, dry air from the outside can enter the device through the continuous air outlet 10c to replenish pressure, thus maintaining the air pressure balance inside and outside the headlight cavity and preventing structural damage to the lamp cavity caused by air pressure differences. Therefore, it can solve the fogging problem while also providing effective structural protection for the headlight body, resulting in a comprehensive improvement in the overall performance of the headlight.

[0048] It is also important to understand that, in this embodiment, the blocking mechanism 20 is the core transmission hub connecting the deformable component 60 and the airflow channel. All its rotational displacements have no additional power source; the sole power for rotation comes entirely from the force generated when the deformable component 60 undergoes physical deformation. This achieves purely physical, unpowered adaptive opening and closing, greatly simplifying the overall structure of the device and fundamentally reducing the probability of mechanical failure. Simultaneously, the rotational stroke and blocking area of ​​the blocking mechanism 20 are precisely matched with the diameter and contour of the air inlet 10b and air outlet 10c, ensuring sealing performance under blocking conditions.

[0049] In addition, the sealing mechanism 20 in this embodiment adopts a rotating connection structure, which is more suitable for the narrow and irregular installation space inside the vehicle headlight compared with the plug-in and sliding sealing structures. It has low damping and fast response speed during rotation, and can quickly follow the deformation state of the deformable part 60 to complete the position switching. Moreover, the contact method of the rotating connection has minimal wear, and can withstand the high-frequency vibration of the vehicle during long-term driving, reducing the frequency of later maintenance and replacement.

[0050] Following the above, the deformable part 60 can be a polymer engineering plastic deformable part 60 (plastic sheet or plastic strip), or a special rubber deformable part 60 (rubber sheet / rubber strip), shape memory alloy wire or shape memory alloy rod, or metal sheet.

[0051] Plastics have a high coefficient of thermal expansion. At the same temperature, the plastic deformable part 60 has a large end deformation. Only a small temperature rise from the heating device 50 is needed to generate sufficient deformation and driving force at the end, easily driving the sealing mechanism 20 to rotate. The driving force is stronger and the deformation is more sensitive. In addition, the deformation of plastic is a flexible elastic deformation, and the linear thrust generated at the end is a soft thrust. When converted into rotational torque, there is no rigid impact, which can ensure transmission efficiency and significantly reduce the wear of the mounting point and shaft of the sealing mechanism 20. At the same time, the contact friction coefficient between plastics is low, resulting in smoother rotation without jamming.

[0052] The thermal expansion and contraction and elastic deformation properties of rubber allow its ends to have a high deformation. Even with low temperature and slight heating, it can generate enough thrust to drive the sealing mechanism 20 to rotate. This results in extremely low power requirements for the heating device 50 and good energy efficiency. Furthermore, the elastic deformation of rubber can provide continuous thrust, making the rotation more stable.

[0053] The deformation of rubber is a completely elastic and flexible deformation, and the driving force transmitted is a gentle tension / thrust, which is unlikely to cause hard damage to the sealing mechanism 20. There is almost no abnormal noise or relatively small abnormal noise when rotating, and it is resistant to vibration and impact. The bumps during vehicle driving will not affect the deformation stability.

[0054] Shape memory alloy wires or rods offer extreme precision in deformation, high temperature resistance, unparalleled fatigue resistance, stable end deformation, zero deviation in resetting, and a long service life.

[0055] In the embodiments of this application, a metal sheet is preferred.

[0056] Further, please refer to Figure 2 as well as Figure 3 The deformable element 60 is a metal sheet that extends along the first direction, and one end of the deformable element 60 is connected to the sealing mechanism 20 at the mounting point. The radial direction of the mounting point is at an angle to the first direction.

[0057] It is understandable that the movement of the blocking mechanism 20 is a rotational motion around the main body 10, requiring rotational torque; while the deformation of the metal sheet extending along the first direction is a linear expansion and contraction deformation, generating a linear thrust or pull force along the first direction. Since the radial direction of the mounting point is set at an angle to the first direction, the linear deformation force of the metal sheet along the first direction is decomposed through the mounting point at the angle into an effective component perpendicular to the radial direction of rotation of the blocking mechanism 20 and an ineffective component along the radial direction. The effective component is directly converted into torque to drive the rotation of the blocking mechanism 20, allowing the linear deformation of the metal sheet to directly and effectively drive the circumferential rotation of the blocking mechanism 20. Preferably, the radial direction of the mounting point is perpendicular to the first direction, thus almost eliminating ineffective separation along the radial direction, and the linear deformation force is mostly an effective component perpendicular to the radial direction of rotation of the blocking mechanism 20.

[0058] It is also important to understand that after the heating device 50 stops heating, the metal sheet can return to its original shape, thereby driving the sealing mechanism 20 back to the first position, that is, sealing the vent 10c.

[0059] The deformation characteristics of the metal sheet are linear or bending deformation along its own extension direction. After extending in a single, straight direction, the deformation direction of the metal sheet when heated is limited, and it will only elongate, shorten, or bend in a directional manner along the first direction, without any irregular twisting, offsetting, warping, or other ineffective deformation. In this way, when the deformable part 60 is heated and deformed, all the deformation energy of the metal sheet can be converted into effective driving force and transmitted to the mounting point of the sealing mechanism 20. There will be no loss of driving force or deviation in transmission direction due to ineffective deformation, which structurally ensures the accuracy of the rotation direction of the sealing mechanism 20, and it will only rotate in the preset direction.

[0060] The metal sheet is thin and extends along the first direction. The heat transferred by the heating device 50 can quickly and evenly cover the entire metal sheet. All parts of the sheet heat up and deform synchronously, without localized heating or deformation. This uniform deformation ensures that the force transferred from the metal sheet to the sealing mechanism 20 is stable, continuous, and without impact, and the rotation of the sealing mechanism 20 is smooth and without jerking.

[0061] Based on the cumulative deformation characteristics of a linear metal sheet, the deformation at the end is the peak value of the entire metal sheet, far exceeding the deformation in the middle section. In the demisting device 1 of this application embodiment, the sealing mechanism 20 needs to complete a fixed-angle rotation from the first position (sealing the air outlet 10c) to the second position (sealing the air inlet 10b). This rotation requires the metal sheet to provide sufficient deformation stroke and displacement. The mounting point at the end directly utilizes the maximum deformation of the metal sheet. Only a small heating temperature is needed for the metal sheet to generate sufficient deformation stroke, easily pushing the sealing mechanism 20 to complete the preset rotation angle and accurately achieving the switching and sealing of the air outlet.

[0062] In this embodiment, when the heating device 50 heats the mounting cavity 10a, the metal sheet undergoes directional elastic deformation (first deformation state) along the first direction due to heat. The deformation of the metal sheet generates a linear thrust. Through the mechanical transformation of the end mounting point and the included angle, the linear deformation force is converted into a rotational torque, which actively drives the sealing mechanism 20 to rotate from the first position (sealing the air outlet 10c) to the second position (sealing the air inlet 10b), thus completing the switching of the device's heating and dehumidification modes.

[0063] When the heating device 50 stops working, the temperature inside the mounting cavity 10a naturally drops to room temperature. At this time, the metal sheet does not require any external force, electrical control, or drive components. Relying on its own metal elasticity, it accurately rebounds from the deformed state to the initial flat state. During the metal sheet's reset and rebound process, a reverse linear rebound driving force opposite to the deformation direction is generated. This rebound force is also converted into a reverse rotational torque through the end mounting point and included angle design. It actively, accurately, and stably drives the sealing mechanism 20 from the second position (sealing the air inlet 10b) back to the first position (sealing the air outlet 10c), completing the reset of the device's normal moisture absorption and anti-fog working condition.

[0064] Furthermore, it should be understood that the metal sheet in this embodiment is achieved through repeated verification, that is, after the heating device 50 heats the metal sheet to a certain time with a preset power, the metal sheet can undergo sufficient deformation, thereby pushing the sealing mechanism 20 to rotate from the first position to the second position.

[0065] Furthermore, the metal sheet in this embodiment is a double-layer metal sheet; please refer to [link / reference]. Figure 2 The deformable element 60 includes a first metal sheet 61 and a second metal sheet 62. The second metal sheet 62 is at least partially attached to the first metal sheet 61. The second metal sheet 62 is closer to the rotation axis of the sealing mechanism 20 than the first metal sheet 61. The second metal sheet 62 is connected to the heating device 50. The coefficient of expansion of the second metal sheet 62 is smaller than that of the first metal sheet 61.

[0066] In this embodiment, the second metal sheet 62 is a passive layer, that is, a metal sheet with a very small coefficient of thermal expansion. When heated, it has a relatively small elongation and contraction deformation, high hardness, and stable deformation. It is a rigid support layer for the bimetallic sheet and is generally made of iron-nickel alloy.

[0067] The first metal sheet 61 is the active layer, which is a metal sheet with a very large coefficient of thermal expansion. When heated, it has a relatively large elongation and contraction deformation and is sensitive to deformation. It is the core dynamic layer for generating bending deformation force and restoring spring stress in the bimetallic sheet. It is generally made of brass or copper-zinc alloy.

[0068] The bimetallic sheet always has a fixed bending deformation direction. When heated, it bends in an arc towards the passive layer (low expansion) side; when cooled, it springs back from the bent state to the passive layer side to the flat initial state.

[0069] In this embodiment, when the heating device 50 is working, the second metal sheet 62 is heated. The two metal layers of the bimetallic sheet are heated simultaneously. The metal layer with a larger coefficient of thermal expansion will elongate more, while the metal layer with a smaller coefficient of thermal expansion will elongate less. The difference in elongation between the two metal layers forms a unidirectional and directional bending deformation force, which pushes the bimetallic sheet to undergo arc-shaped bending deformation towards the side with a smaller coefficient of thermal expansion. This deformation force accumulates at the end, forming a super large deformation and super strong driving force at the end, which is converted into rotational torque, driving the sealing mechanism 20 to rotate from the first position to the second position.

[0070] When the heating device 50 stops working, the second metal sheet 62 and the first metal sheet 61 cool down to room temperature. The two metal layers of the bimetallic sheet contract simultaneously. The metal layer with the larger coefficient of thermal expansion contracts more, and the metal layer with the smaller coefficient contracts less. The difference in the amount of contraction between the two metal layers forms a reverse elastic rebound stress, which pushes the bimetallic sheet from the bent deformation state to the initial straight state with precision and without deviation. This rebound stress also accumulates at the end, forming an ultra-large reset stroke and ultra-strong reset rebound force at the end, which is converted into a reverse rotation torque, actively driving the sealing mechanism 20 to accurately return from the second position to the first position.

[0071] It is also understandable that the bimetallic strip resets due to active stress rebound. The reset force of the bimetallic strip is not simply the elasticity of the metal, but a rigid rebound thrust formed by the stress difference of the thermal expansion and contraction of the two metal layers. It is a strong reset driving force. The strong rebound force at the end of the bimetallic strip can easily overcome the rotational damping and accurately push the sealing mechanism 20 from the second position back to the first position, tightly sealing the vent 10c.

[0072] Furthermore, in this embodiment, the second metal sheet 62 is directly connected to the heating device 50. The heat generated by the heating device 50 is directly, quickly, and evenly transferred to the second metal sheet 62 through metal thermal conduction, and then simultaneously transferred to the first metal sheet 61 through the bonding surface of the two metal layers. This structure eliminates heat loss due to air conduction and avoids lag in heat transfer, greatly improving heat utilization. The second metal sheet 62 (low expansion) has stable thermal conductivity, enabling it to evenly transfer heat to the bonded first metal sheet 61. The two metal layers are heated and deformed synchronously, preventing localized overheating or ineffective deformation. The entire deformation process is a directional bending of the whole, without stress accumulation or twisting, further ensuring the stability of the driving force.

[0073] In addition, please continue to refer to Figure 2In this embodiment, the mounting point and the heating position are located at opposite ends of the second metal sheet 62. One end of the second metal sheet 62 is a fixed heating end, and the deformable member 60 extends linearly along the first direction to the other end of the long strip structure, where a mounting point is provided (connected to the sealing mechanism 20 for power output), forming an optimal cantilever beam structure with one end fixed and heated and the other end freely driven. The expansion coefficient of the second metal sheet 62 is less than that of the first metal sheet 61. When heated, the first metal sheet 61 deforms more and the second metal sheet 62 deforms less. The deformation stress accumulates unidirectionally from the heating end to the mounting end. When cooled, the rebound stress formed by the difference in shrinkage is transmitted unidirectionally from the heating end to the mounting end.

[0074] In this way, the heat of the heating device 50 is input only from a single heating end of the second metal sheet 62. The heat will extend along the first direction of the deformable part 60 and be conducted to the other end in a unidirectional, uniform and lossless manner. There will be no situation where the heat spreads to the surroundings or flows back in the opposite direction. All the heat is used to trigger the thermal deformation of the bimetallic sheet. The heat utilization rate reaches the extreme. Only a small temperature rise is needed to generate sufficient deformation stress.

[0075] The thermal deformation characteristics of the bimetallic strip are that the deformation gradually accumulates along the linear extension direction. Starting from the heating end, the deformation difference between the first metal strip 61 and the second metal strip 62 will form the initial deformation stress. As the heat is conducted to the installation end, the stress will continuously be superimposed and amplified along the linear direction. The closer to the other end, the greater the deformation and the stronger the linear thrust generated by the deformation. This makes it easier to overcome the rotational damping of the blocking mechanism 20, making it easier for the blocking mechanism 20 to switch between the first position and the second position.

[0076] Furthermore, please refer to Figure 2 The heating device 50 includes a first conductive element 51, a second conductive element 52, and an electrode heating plate 53. The electrode heating plate 53 is connected to the sealing mechanism 20. The first conductive element 51 and the second conductive element 52 are both electrically connected to the electrode heating plate 53, and the first conductive element 51 is also connected to the second metal plate 62.

[0077] The electrode heating element 53 is the heating body of the heating device 50. It is a flexible, thin sheet-shaped electric heating element and is a commercially available product. The heat generated is used to heat the moisture absorption and desorption element 30 to complete the dehumidification, and to trigger the thermal deformation of the bimetallic deformation element 60. The electrode heating element 53 is directly connected to the sealing mechanism 20, and the heat can be transferred to the sealing mechanism 20 (generally set as a metal heat-conducting element) and the deformation element 60 simultaneously, providing dual heat conduction. The first conductive element 51 and the second conductive element 52 are the dual power supply terminals of the electrode heating element 53, providing stable power to the heating element and forming the basis for heating. The first conductive element 51 not only supplies power to the electrode heating element 53, but also has a rigid connection with the second metal plate 62, which directionally conducts the heat of the electrode heating element 53 to the second metal plate 62, while providing fixed support for the second metal plate 62. Thus, there are no extra connecting parts 22 or fixing parts, and the volume of the entire structure is compressed to a minimum, which can be easily embedded in the vehicle headlight. The second conductive element 52 only provides power and has no additional connection.

[0078] In this embodiment, the heat generated by the electrode heating element 53 is directly and rigidly conducted to the second metal sheet 62 through the first conductive element 51, rather than indirectly through air or other components. This results in high heat transfer efficiency and low loss from the electrode heating element 53 to the second metal sheet 62, ensuring that almost all heat is precisely used to heat the bimetallic deformable element 60 without being lost in the mounting cavity 10a. With one end of the second metal sheet 62 being the heating end and the other end being the mounting end, heat is conducted unidirectionally along the linear extension direction of the deformable element 60. Only a small temperature increase is needed to generate sufficient deformation in the first metal sheet 61, creating rigid bending stress that easily and precisely rotates the sealing mechanism 20 from the first position to the second position.

[0079] After power is cut off, the electrode heating element 53 stops heating, and the heat of the entire heating system is simultaneously and rapidly dissipated through two core paths: the electrode heating element 53 is directly connected to the sealing mechanism 20, and the heat is rapidly dissipated into the lamp cavity through the metal structure of the sealing mechanism 20; the remaining heat of the electrode heating element 53 is rapidly conducted to the second metal sheet 62 through the first conductive element 51, and then dissipated from the second metal sheet 62. This bidirectional heat dissipation structure allows the temperature of the bimetallic deformable element 60 to drop to room temperature uniformly and quickly. The difference in shrinkage between the two metal layers can be instantly and fully converted into reverse rebound stress. That is, the faster the cooling, the more concentrated and stronger the rebound stress, which can quickly form a rigid positive pushing reset force, easily overcome the rotational damping of the sealing mechanism 20, and steadily and accurately push the sealing mechanism 20 back from the second position to the first position.

[0080] To ensure the stability of the connection and efficient and rapid transmission, the first conductive element 51 and the second metal sheet 62 are integrally formed without any seams or connecting medium. The first conductive element 51 and the second metal sheet 62 are integral structures of the same piece of metal. The thermal conductivity of metal is continuous and lossless. The heat generated by the electrode heating plate 53 is conducted from the first conductive element 51 to the second metal sheet 62 with zero heat loss and minimal conduction delay. The heat is instantly, uniformly, and completely transferred to the entire second metal sheet 62, and then synchronously transferred to the attached first metal sheet 61.

[0081] Furthermore, the first conductive element 51 and the second metal sheet 62 have no weak points or stress concentration areas. The first conductive element 51 and the second metal sheet 62 form a rigid metal skeleton, and deformation stress, springback stress, and torque stress can be evenly distributed to the entire metal sheet through the integrated structure, without local overload or stress cracking risk. At the same time, the force transmission path is absolutely continuous and without interruption. The stress generated from the second metal sheet 62 can be more completely transmitted to the installation end and then converted into the rotational torque of the sealing mechanism 20, which greatly improves the transmission efficiency.

[0082] In another embodiment of this application, the first conductive element 51 includes a first base 511 and a first conductive cantilever 512 connected to each other, the first conductive cantilever 512 being arranged at an angle to the first base 511; the second conductive element 52 includes a second base 521 and a second conductive cantilever 522 connected to each other, the second conductive cantilever 522 being arranged at an angle to the second base 521; the electrode heating plate 53 is connected to the sealing mechanism 20; wherein the first conductive cantilever 512 and the second conductive cantilever 522 are both electrically connected to the electrode heating plate 53, and the extending directions of the first conductive cantilever 512 and the second conductive cantilever 522 intersect the rotation axis of the sealing mechanism 20.

[0083] In this embodiment, the first base 511 and the second base 521 are rigid structures, serving as rigid supports and fixing bases for the entire conductive component. They possess sufficient structural strength and can be stably and firmly fixed to the mounting position of the main body 10. They will not shift or deform due to vibration or external force, providing a stable mounting support and rigid conductive base for the entire heating device 50, and ensuring the physical stability of the power supply.

[0084] The first conductive cantilever 512 and the second conductive cantilever 522 are flexible functional segments, and are respectively set at an angle to the corresponding first substrate 511 and second substrate 521. The first conductive cantilever 512 and the second conductive cantilever 522 are the core to realize the electrical connection with the electrode heating plate 53. The angled design allows the first conductive cantilever 512 and the second conductive cantilever 522 to naturally form elastic deformation margin and movement space. Unlike the rigid conductive structure of direct connection, the first conductive cantilever 512 and the second conductive cantilever 522 set at an angle have elastic and flexible characteristics, perfectly adapting to the rotation of the sealing mechanism 20 and avoiding rigid bending.

[0085] It is understandable that the angles between the first conductive cantilever 512 and the first substrate 511, and between the second conductive cantilever 522 and the second substrate 521, allow the first conductive cantilever 512 and the second conductive cantilever 522 to have sufficient elastic deformation space. At the same time, the extension direction of the cantilever intersects the rotation axis. When the sealing mechanism 20 rotates, the swing trajectory of the electrode heating plate 53 matches the elastic deformation direction of the first conductive cantilever 512 and the second conductive cantilever 522. At this time, the first conductive cantilever 512 and the second conductive cantilever 522 will undergo flexible stretching deformation along the swing direction, rather than rigid resistance, which reduces the resistance to the rotation of the sealing mechanism 20 and ensures the smoothness of the rotation of the sealing mechanism 20 throughout.

[0086] It is understandable that the electrode heating element 53 is generally fixed on the sealing mechanism 20, and the electrode heating element 53 is a precision heating component. The connection end with the sealing mechanism 20 is a weak point. The first conductive cantilever 512 and the second conductive cantilever 522, which are set with elastic angles, will absorb and buffer the tensile stress generated by rotation. Only a small part of the stress is transmitted to the connection end of the heating element, reducing the possibility of the electrode heating element 53 falling off or being damaged.

[0087] Furthermore, the first conductive cantilever 512 is integrally formed with the first substrate 511, and the second conductive cantilever 522 is integrally formed with the second substrate 521. The integrally formed structure has no splicing gaps, welding points, or adhesive layers. The first substrate 511 and the first conductive cantilever 512, and the second substrate 521 and the second conductive cantilever 522 are complete single metal components with a rigid metal skeleton throughout. There are no stress concentration weak points in the split structure, the structural strength is greatly improved, and there will be no fatal failures such as weld cracking, adhesive detachment, or cantilever loosening.

[0088] The angled design allows the integrally formed first conductive cantilever 512 and second conductive cantilever 522 to naturally form elastic deformation margins, eliminating the need for additional elastic components. This retains the rigid support and fixing properties of the base while giving the first conductive cantilever 512 and second conductive cantilever 522 flexible elastic adaptability properties, perfectly integrating rigidity and flexibility, and taking into account both secure installation and adaptability to movement.

[0089] Furthermore, the integrally formed first conductive cantilever 512 and second conductive cantilever 522 have no splicing gaps, and the conductive path is continuous throughout during elastic deformation. The displacement generated by the rotation of the sealing mechanism 20 will be adaptively compensated by the elastic deformation of the first conductive cantilever 512 and second conductive cantilever 522, always maintaining tight electrical contact with the heating element, thus reducing the occurrence of poor contact and intermittent power outages.

[0090] In one embodiment of this application, please refer to Figure 5 and Figure 6The sealing mechanism 20 includes a rotating body 21 and a connecting member 22. The rotating body 21 includes a central frame 211 and a first baffle 212 and a second baffle 213 distributed circumferentially along the central frame 211. The first baffle 212 and the second baffle 213 are both connected to the central frame 211. The first baffle 212 has a first through hole 212a and the second baffle 213 has a second through hole 213a. In a first position, the first baffle 212 blocks the air outlet 10c and the second through hole 213a communicates with the air inlet 10b. In a second position, the second baffle 213 blocks the air inlet 10b and the first through hole 212a communicates with the air outlet 10c. The connecting member 22 is located on the outer periphery of the rotating body 21, connected to the deformable member 60, and connected to one of the first baffle 212 and the second baffle 213.

[0091] Two baffles are distributed circumferentially along the central frame 211, forming a complementary sealing structure. In the first position, the first baffle 212 precisely blocks the air outlet 10c, and the second through hole 213a of the second baffle 213 is aligned with the air inlet 10b, achieving air intake conduction and air outlet sealing. Moisture enters the lamp cavity through the air inlet 10b and works with the moisture absorption and release component 30 to complete moisture absorption. In the second position, the second baffle 213 precisely blocks the air inlet 10b, and the first through hole 212a of the first baffle 212 is aligned with the air outlet 10c, achieving air outlet conduction and air intake sealing. Moisture is discharged through the air outlet 10c, completing dehumidification. The rotating body 21 only needs to perform a single rotation around the central frame 211 to complete the switching from moisture absorption mode to dehumidification mode, without the need for multi-component linkage or complex transmission structure.

[0092] The central frame 211 serves as the core rotation fulcrum and rigid skeleton of the rotating body 21. The first baffle 212 and the second baffle 213 are symmetrically distributed around the central frame 211, forming a stable integrated structure with the central frame 211. The structure has high strength and will not deform due to rotation or blocking. Moreover, the distribution of the two baffles is uniform, the center of mass of the rotating body 21 is in the center, the torque during rotation is stable, and the rotation process is relatively smooth.

[0093] The connector 22 is located on the outer periphery of the rotating body 21, rather than at the central frame 211, forming a large-radius lever arm structure. The linear driving force of the deformable component 60 is converted into the rotational torque of the rotating body 21 through the connector 22 on the outer periphery. The torque is amplified, and only a small deformation stress of the deformable component 60 is needed to easily drive the rotating body 21 to rotate, thereby ensuring the smooth rotation of the sealing mechanism 20.

[0094] Furthermore, the connector 22 is connected to the deformable part 60 at one end and to the first baffle 212 at the other end, forming a rigid point-to-point connection. The transmission path of the driving force is short and without bends. The connection between the connector 22 and the deformable part 60 can be a snap-fit ​​or a weld. It is only necessary to ensure that the connection between the connector 22 and the deformable part 60 is reliable when the rotating body 21 rotates.

[0095] Furthermore, in this embodiment, the moisture absorption and release component 30 is connected to the central frame 211, which means it will not occupy other space in the mounting cavity 10a, thus facilitating the overall miniaturization design.

[0096] Furthermore, the defogging device 1 also includes a first sealing strip 70 and a second sealing strip 80.

[0097] The first sealing strip 70 is located between the air outlet 10c and the first baffle 212 and has a first connecting hole 70a that communicates with the air outlet 10c. The second sealing strip 80 is located between the air inlet 10b and the second baffle 213 and has a second connecting hole 80a that communicates with the air inlet 10b.

[0098] In this embodiment, the first sealing strip 70 is a dedicated sealing gasket for the air outlet 10c, and the second sealing strip 80 is a dedicated sealing gasket for the air inlet 10b. The sealing strips are made of elastic material (silicone, rubber, or foam) and are tightly clamped between the end face of the air outlet 10c and the end face of the first baffle 212, the end face of the air inlet 10b, and the end face of the second baffle 213. They undergo elastic compression deformation, fill the gaps, and form a gapless sealing surface. The first sealing strip 70 and the second sealing strip 80 are independently arranged to ensure good sealing in the first and second blocking states.

[0099] Furthermore, since the first baffle 212 and the second baffle 213 are rigid structures, when the rotating body 21 switches positions, the first baffle 212 and the second baffle 213 will have rigid contact, friction, and impact with the corresponding air outlet 10c end face and air inlet end face. Long-term high-frequency switching will cause the baffle end face to be scratched, worn, and deformed, resulting in a larger sealing gap and a decrease in air tightness. On the other hand, the elastic first sealing strip 70 and the second sealing strip 80 act as buffer pads, allowing the first baffle 212 and the second baffle 213 to have elastic soft contact with the corresponding air outlet 10c end face and air inlet end face, eliminating rigid impact and friction, thereby maintaining long-term reliable sealing. Similarly, the first sealing strip 70 and the second sealing strip 80 can also protect the structural integrity of the air inlet 10b and the air outlet 10c, without the risk of damage.

[0100] Please continue reading. Figure 5 and Figure 6 Considering that the vent 10c is connected to the outside atmosphere during the heating stage, in order to prevent rainwater or dust from entering the mounting cavity 10a, the main body 10 also forms a filter cavity 10d. One end of the filter cavity 10d is connected to the vent 10c, and the other end of the filter cavity 10d is provided with a breathable, waterproof and dustproof membrane 11.

[0101] During the heating and dehumidification stage, the vent 10c is open, and the moisture in the mounting cavity 10a enters the filter cavity 10d through the vent 10c. It is then smoothly discharged to the outside atmosphere through the breathable, waterproof and dustproof membrane 11. Rainwater, dust, mud, debris and other external substances are completely blocked outside the filter cavity 10d by the waterproof and dustproof membrane, preventing them from entering the filter cavity 10d or flowing back into the mounting cavity 10a, thus ensuring the reliability of the vehicle lights and the defogger 1.

[0102] Among them, the breathable, waterproof and dustproof membrane 11 can be an expanded polytetrafluoroethylene membrane (also known as a polytetrafluoroethylene microporous breathable membrane). The membrane is covered with nano-sized micropores, and gaseous water molecules and air molecules can easily pass through the micropores and be discharged. It does not block the moisture after heating and will not cause moisture to block the filter chamber 10d. The particle size of liquid rainwater and car wash water is much larger than the micropores of the membrane. Moreover, the membrane itself is a superhydrophobic material. When liquid water comes into contact with the membrane surface, it will form water droplets and roll off, and it cannot penetrate into the membrane body at all, which can effectively achieve the waterproof effect.

[0103] Furthermore, the breathable, waterproof, and dustproof membrane 11 is attached to the outer port of the filter chamber 10d, which is an external protection. During assembly, it only needs to be glued or clipped to fix it. The process is simple and the precision requirements are low. In subsequent maintenance, if the membrane is blocked, it can be easily disassembled and replaced without disassembling the internal core components, thus reducing maintenance costs.

[0104] This application also discloses a vehicle lamp assembly, which includes a vehicle lamp and the aforementioned defogger 1. The vehicle lamp includes a lamp housing and a lamp cover, which are connected to form a lamp cavity. The lamp housing has an installation port for connecting to the lamp cavity, and the main body 10 is fitted into the installation port. Since the vehicle lamp assembly adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0105] It should be understood that, in this embodiment, the main body 10 of the defogging device 1 and the mounting port of the lamp housing are assembled with an interference fit. The outer periphery of the main body 10 is tightly fitted to the inner wall of the mounting port to form a seamless and fastened connection. Part of the main body 10 extends into the inner side of the lamp cavity, while the breathable, waterproof and dustproof membrane 11 is located on the outer side of the lamp housing. The assembly is stable and without loosening. Of course, it can be understood that, in order to strengthen the connection between the defogging device 1 and the lamp housing, bolt or screw mounting positions (not shown in the figure) can also be provided on the main body 10 and the lamp housing to further improve the stability of the connection.

[0106] Of course, a sealing strip can also be installed at the position of the main body 10 and the mounting port to prevent rainwater, dust and other impurities from entering the lamp cavity through the edge of the mounting port.

[0107] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A defogging device, characterized in that, Used in vehicle lights, including: The main body has an installation cavity and an air inlet and an air outlet communicating with the installation cavity; A blocking mechanism is rotatably connected to the main body. The blocking mechanism has a first position and a second position. In the first position, the blocking mechanism blocks the air outlet, and in the second position, the blocking mechanism blocks the air inlet. A moisture-absorbing / discharging component is disposed within the mounting cavity; A heating device for heating the cavity inside the mounting chamber; A deformable element, at least partially disposed within the mounting cavity and connected to the sealing mechanism, is used to drive the sealing mechanism to rotate relative to the main body when the heating device is working. The deformable element has an initial state and a first deformation state after heating. In the initial state, the sealing mechanism is in the first position, and in the first deformation state, the sealing mechanism is in the second position.

2. The demisting device according to claim 1, characterized in that, The deformable element is a metal sheet that extends along a first direction, and one end of the deformable element is connected to the sealing mechanism at an installation point. The radial direction of the installation point forms an angle with the first direction.

3. The demisting device according to claim 2, characterized in that, The deformable component includes: First metal sheet; The second metal sheet is at least partially attached to the first metal sheet, and the second metal sheet is closer to the rotation axis of the sealing mechanism than the first metal sheet. The second metal sheet is connected to the heating device. The coefficient of thermal expansion of the second metal sheet is less than that of the first metal sheet.

4. The demisting device according to claim 3, characterized in that, The heating device includes: First conductive element; The second conductive element; and, Electrode heating element, connected to the sealing mechanism; Both the first conductive element and the second conductive element are electrically connected to the electrode heating plate, and the first conductive element is also connected to the second metal plate.

5. The demisting device according to claim 4, characterized in that, The first conductive element and the second metal sheet are integrally formed.

6. The demisting device according to claim 1, characterized in that, The heating device includes: The first conductive element includes a first substrate and a first conductive cantilever connected to each other, wherein the first conductive cantilever is disposed at an angle to the first substrate; The second conductive element includes a second substrate and a second conductive cantilever connected to each other, the second conductive cantilever being disposed at an angle to the second substrate; and... Electrode heating element, connected to the sealing mechanism; The first conductive cantilever and the second conductive cantilever are both electrically connected to the electrode heating plate, and the extension directions of the first conductive cantilever and the second conductive cantilever intersect the rotation axis of the sealing mechanism.

7. The demisting device according to claim 1, characterized in that, The blocking mechanism includes: A rotating body, comprising a central frame and first and second baffles spaced circumferentially along the central frame, both connected to the central frame. The first baffle has a first through hole, and the second baffle has a second through hole. In the first position, the first baffle blocks the air outlet, and the second through hole communicates with the air inlet. In the second position, the second baffle blocks the air inlet, and the first through hole communicates with the air outlet. A connector is disposed on the outer periphery of the rotating body, connected to the deformable component, and connected to one of the first baffle and the second baffle; The moisture absorption and release component is connected to the central frame.

8. The demisting device according to claim 7, characterized in that, The defogging device also includes: A first sealing strip, wherein the first sealing strip is disposed between the vent and the first baffle, and the first sealing strip has a first communicating hole communicating with the vent; and The second sealing strip is disposed between the air inlet and the second baffle, and the second sealing strip has a second connecting hole that communicates with the air inlet.

9. The demisting device according to claim 1, characterized in that, The main body also forms a filter chamber, one end of which is connected to the air outlet, and the other end of which is provided with a breathable, waterproof and dustproof membrane.

10. A vehicle lighting assembly, characterized in that, include: The vehicle light includes a lamp housing and a lamp cover, the lamp housing and the lamp cover are connected and form a lamp cavity, and the lamp housing has an installation port for connecting to the lamp cavity; and The defogging device according to any one of claims 1-9, wherein the main body is fitted into the mounting port.

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