A vehicle lamp anti-fog device and a vehicle lamp structure

Abstract

The application provides a car lamp anti-fog device and a car lamp structure. The car lamp anti-fog device comprises a valve body, one side of the valve body is provided with a mounting groove, the bottom surface of the mounting groove forms an air exchange port, the air exchange port is communicated with an air flow exchange channel penetrating through the valve body, a film piece is installed in the mounting groove to cover the air exchange port, and a pressing plate structure is arranged on the surface of the film piece and is provided with a leaving part forming an air outlet channel between the side wall of the mounting groove. The application solves the technical problem that the air permeable part balances the pressure difference between the inside and outside of the car lamp, and at the same time, the water vapor outside the car lamp is brought into the car lamp, causing the car lamp to fog.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and more specifically, to a vehicle headlight anti-fog device and a vehicle headlight structure. Background Technology

[0002] Car headlights typically have ventilation components to balance the pressure difference between the inside and outside of the headlight, and moisture in the inside and outside of the headlight also flows between them through the ventilation components.

[0003] However, while the ventilation components balance the pressure difference between the inside and outside of the headlight, they can also bring moisture from outside the headlight into the headlight, causing fogging inside the headlight. Utility Model Content

[0004] The technical problem solved by this invention is that while the ventilated component balances the pressure difference between the inside and outside of the headlight, it also brings moisture from outside the headlight into the headlight, causing fogging inside the headlight.

[0005] To solve the above problems, this utility model provides a vehicle headlight anti-fog device, comprising: The valve body has a mounting groove on one side, and the bottom surface of the mounting groove forms a ventilation port, which is connected to the airflow interaction channel that runs through the valve body. A membrane element is installed in the mounting groove to cover the ventilation port; The pressure plate structure is set on the surface of the film part, and the pressure plate structure has a relief part that forms an air outlet channel between itself and the side wall of the mounting groove. The pressure plate structure has an air outlet corresponding to the relief part that connects to the air outlet channel. Among them, the pressure plate structure has a receiving cavity on the side near the film component to accommodate the deformation of the film component; As the airflow flows out from the airflow interaction channel toward the air exchange port, the diaphragm on the air exchange port opens; as the airflow flows into the airflow interaction channel from the outlet channel, the air exchange port is partially blocked by the diaphragm.

[0006] Compared with existing technologies, the technical effects achieved by this solution are as follows: By setting up the clearance portion, an air outlet channel is formed between it and the side wall of the mounting groove, facilitating airflow exchange with the gas inside the headlight. During air intake, the air inlet is partially blocked by the diaphragm component, while during air exhaust, the diaphragm component deforms towards the receiving cavity, i.e., away from the air inlet, thus opening the air inlet. This ensures that the opening degree of the air inlet during exhaust is greater than that during intake, thereby achieving the effect of easy airflow and difficult entry, effectively suppressing fogging inside the headlight.

[0007] In one embodiment of this utility model, the distance between the ventilation port and the air outlet is greater than 0; and / or The width of the air outlet channel formed between the side wall of the mounting groove and the air outlet is greater than 0.1 mm.

[0008] Compared to existing technologies, the technical benefits of this solution are as follows: By rationally designing the width of the air outlet channel, the obstruction caused by the valve body and pressure plate structure is reduced, thereby ensuring effective ventilation of the headlights. For example, the air outlet channel is created by a clearance in the pressure plate structure, forming a gap between the pressure plate structure and the side wall of the mounting groove. This allows the air outlet to exchange gases with the internal and external environments of the headlights. Alternatively, the air outlet channel can also be created by a clearance in the valve body, which will not be elaborated upon here.

[0009] In one embodiment of this utility model, the pressure plate structure includes a main body and multiple support parts; The clearance portion is formed at the edge of the main body near the side wall of the mounting groove; Multiple support portions are disposed on the side of the main body facing the film component; multiple support portions are arranged around the edge of the main body and together with the main body form a receiving cavity; multiple support portions are spaced apart from each other to form air vents; Among them, the sum of the opening areas of the air vents accounts for 5-50% of the sum of the surface areas of multiple support parts.

[0010] In one embodiment of this utility model, the plurality of support portions include a first support portion and a second support portion; The first support part is located in the clearance part; The second support portion is provided around the edge of the main body portion outside the clearance portion, and the distance between the second support portion and the first support portion is provided. During the process of airflow flowing out from the airflow interaction channel toward the air exchange port, at least a portion of the structure of the thin film component deforms toward the gap formed between the first support portion and the second support portion, so that the air outlet channel communicates with the air exchange port.

[0011] In one embodiment of this utility model, there are multiple first support parts, and the first support parts that are arranged adjacent to the second support part are defined as support part one and support part two. The distance between one end of the first support part and the second support part is set to form a first distance between them; The distance between the second support part and the other end of the second support part is set to form a second distance between them; Among them, a third gap is formed between support part one and support part two, and the air outlet includes a first gap, a second gap and a third gap.

[0012] In one embodiment of this utility model, the valve body forms a recess in the mounting groove, and the air vent is formed in the recess; The film component covers the settling tank along the positive projection direction of the settling tank; When the diaphragm deforms toward the direction of the sink, an air intake gap is formed between the diaphragm and the sink, connecting the air inlet.

[0013] Compared with existing technologies, the technical effects achieved by this solution are as follows: To ensure that airflow from outside the headlight can enter the headlight to balance the air pressure, a groove is set at the position of the vent on the valve body. The combination of the groove and the vent prevents concentrated deformation of the diaphragm component at the vent. That is, under extreme negative pressure, the diaphragm component deforms towards both the groove and the vent, preventing complete blockage of the vent. This ensures smooth air intake and avoids the headlight's interior being under negative pressure for extended periods.

[0014] In one embodiment of this utility model, the distance between any end of the settling tank and the air outlet is greater than 0; and / or The depth of the settling tank is greater than 0.1 mm.

[0015] In one embodiment of this utility model, there are multiple clearance portions; A relief portion is symmetrically provided on both sides along the length direction of the pressure plate structure; and / or, a relief portion is symmetrically provided on both sides along the width direction of the pressure plate structure.

[0016] Compared with existing technologies, the technical effect achieved by adopting this technical solution is: by increasing the number of clearance parts, the efficiency of balancing the air pressure inside and outside the headlights is improved.

[0017] In one embodiment of this utility model, a filling groove for accommodating desiccant is provided on the side of the valve body away from the diaphragm element; The headlight defogging device also includes a first waterproof and breathable membrane that seals the filling groove.

[0018] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: by setting up a first waterproof and breathable membrane, water vapor is effectively blocked from entering the filling tank, thus extending the service life of the desiccant.

[0019] In one embodiment of this utility model, an air exchange structure with airflow interaction channels is formed inside the filling groove; The circumferential surface of the ventilation structure is provided with reinforcing ribs that connect to the bottom or inner wall of the filling groove.

[0020] Compared with existing technologies, the technical effect achieved by adopting this technical solution is: to enhance the overall structural strength of the valve body by setting reinforcing ribs.

[0021] In one embodiment of this utility model, the vehicle headlight anti-fog device further includes a second waterproof and breathable membrane, which covers the opening of the mounting groove.

[0022] Compared with existing technologies, the technical effect achieved by adopting this technical solution is as follows: by setting a second waterproof and breathable membrane, water vapor in the airflow is blocked, thereby reducing the water vapor content brought into the airflow interaction channel by the airflow.

[0023] On the other hand, this utility model also provides a vehicle lamp structure, including: a vehicle lamp anti-fog device as in any of the above examples.

[0024] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: it can achieve the technical effects corresponding to any of the above examples, which will not be elaborated here.

[0025] By adopting the technical solution of this utility model, the following technical effects can be achieved: (1) By setting the clearance part, an air outlet channel is formed between it and the side wall of the mounting groove, which facilitates the airflow to exchange gas with the inside of the headlight through the air outlet channel. During the air intake process, the air exchange port is partially blocked by the diaphragm component, while during the air exhaust process, the diaphragm component deforms towards the receiving cavity, that is, away from the air exchange port, so that the air exchange port is opened. This ensures that the opening of the air exchange port during the air exhaust process is greater than the opening of the air exchange port during the air intake process, thereby achieving the effect of airflow being difficult to enter and easy to exit, effectively suppressing the occurrence of fogging inside the headlight; (2) To ensure that the airflow outside the headlight can enter the headlight to balance the air pressure, a groove is set at the position of the air exchange port on the valve body. By combining the groove and the air exchange port, the concentrated deformation of the diaphragm component at the air exchange port is dispersed. Under the action of extreme negative pressure, the diaphragm component deforms towards the groove and the air exchange port respectively, avoiding the situation where the diaphragm component completely blocks the air exchange port, thereby ensuring that the air intake process proceeds smoothly and avoiding the headlight being in a negative pressure state for a long time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 An exploded structural diagram of the vehicle headlight anti-fog device provided in this embodiment of the utility model; Figure 2 An exploded structural diagram of the vehicle headlight anti-fog device from another perspective, as provided in this embodiment of the utility model; Figure 3 A partial structural diagram of a vehicle headlight fog defogging device; Figure 4 for Figure 3A cross-sectional view along the aa direction; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram showing the fit between the pressure plate structure and the film component; Figure 7 A partial structural schematic diagram of a vehicle headlight anti-fog device in which the valve body is repositioned to form an air outlet channel, provided for an embodiment of this utility model; Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0027] Explanation of reference numerals in the attached figures: 101. Air outlet channel; 102. First spacing; 103. Second spacing; 104. Third spacing; 10. Valve body; 11. Air exchange port; 12. Mounting groove; 121. Side wall; 13. Airflow interaction channel; 14. Settling groove; 15. Filling groove; 16. Air exchange structure; 17. Reinforcing rib; 20. Membrane component; 30. Pressure plate structure; 31. Relief part; 32. Air outlet; 33. Receiving cavity; 34. Main body; 35. Support part one; 36. Support part two; 37. Second support part; 41. First waterproof and breathable membrane; 42. Second waterproof and breathable membrane. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] In related technologies, when the headlights are turned off, the temperature of the gas inside the headlights gradually decreases, creating negative pressure (relative to the outside of the headlights). This causes external gas to be drawn into the headlights, opening the valve plate in the venting component. Since the existing valve plate is directly opposite the air inlet in the venting component, gas from the external environment directly enters the headlights through the valve plate, resulting in a high speed at which gas (especially water vapor) enters the headlights, making it difficult to effectively suppress fogging inside the headlights.

[0030] See Figures 1-8This utility model provides an exploded structural diagram of a vehicle headlight defogging device. The vehicle headlight defogging device includes a valve body 10, a diaphragm element 20, and a pressure plate structure 30. A mounting groove 12 is provided on one side of the valve body 10, and the bottom surface of the mounting groove 12 forms a ventilation port 11, which communicates with an airflow interaction channel 13 penetrating the valve body 10. The diaphragm element 20 is installed in the mounting groove 12 to cover the ventilation port 11. The pressure plate structure 30 is disposed on the surface of the diaphragm element 20, and the pressure plate structure 30 has a clearance portion 31 that forms an air outlet channel 101 between itself and the side wall 121 of the mounting groove 12. The pressure plate structure 30 has an air passage 32 corresponding to the clearance portion 31 that communicates with the air outlet channel 101.

[0031] Among them, the pressure plate structure 30 is provided with a receiving cavity 33 on the side near the film member 20 to accommodate the deformation of the film member 20; during the process of airflow flowing out from the airflow interaction channel 13 toward the air exchange port 11, the film member 20 on the air exchange port 11 is opened; during the process of airflow flowing from the air outlet channel 101 into the airflow interaction channel 13, the air exchange port 11 is partially blocked by the film member 20.

[0032] Specifically, a diaphragm element 20 and a pressure plate structure 30 are stacked sequentially on the valve body 10. When the airflow flows from the airflow interaction channel 13 toward the air exchange port 11, it causes the diaphragm element 20 covering the air exchange port 11 to move away from the air exchange port 11, that is, the diaphragm element 20 deforms toward the receiving cavity 33. Thus, with the presence of the receiving cavity 33, the diaphragm element 20 covering the air exchange port 11 can be opened, thereby forming an exhaust channel between the diaphragm element 20 and the bottom surface of the mounting groove 12.

[0033] Furthermore, the exhaust passage extends to the edge of the pressure plate structure 30, so the airflow is discharged sequentially from the airflow interaction passage 13, the air exchange port 11, the exhaust passage, the air passage 32, and the air outlet passage 101.

[0034] Conversely, during the process of airflow flowing from the vent 32 into the airflow interaction channel 13, the air pressure inside the headlight is lower than the air pressure outside the headlight, meaning the headlight is under negative pressure. Therefore, under the influence of the external air pressure, the diaphragm component 20 deforms in the direction of squeezing the vent 11, causing the vent 11 to be partially blocked by the diaphragm component 20. Thus, in the two processes described above—air intake (airflow flowing into the airflow interaction channel 13 through the vent 11) and air exhaust (airflow flowing out of the airflow interaction channel 13 through the vent 11)—the different coordination relationships between the diaphragm component 20 and the vent 11 achieve the effect of making airflow difficult to enter and easy to exit.

[0035] Specifically, when the headlight is under negative pressure, airflow enters the lower part of the pressure plate structure 30 through the air outlet channel 101. At this time, the diaphragm component 20 is adsorbed onto the air exchange port 11. Under the action of the adsorption force, the diaphragm component 20 deforms, with its middle part tightly pressed against the air exchange port 11, meaning the air exchange port 11 is partially blocked by the diaphragm component 20. Furthermore, the edges of the diaphragm component 20 are raised away from the plane of the air exchange port 11, thus forming an air intake gap. Therefore, some airflow enters the air intake gap formed by the raised diaphragm component 20, and then enters the airflow interaction channel 13 through the air exchange port 11, thereby balancing the air pressure inside and outside the headlight.

[0036] During the air discharge process, the diaphragm 20 deforms toward the receiving cavity 33, that is, away from the air exchange port 11, so that the air exchange port 11 is opened, ensuring that the opening of the air exchange port 11 during the air discharge process is greater than the opening of the air exchange port 11 during the air intake process, thereby achieving the effect of airflow being difficult to enter and easy to exit.

[0037] In summary, during the air intake process, the diaphragm component 20, under the negative pressure inside the headlight, partially blocks the air exchange port 11, affecting the process by which airflow (especially water vapor) introduced from outside the headlight enters the headlight through the air exchange port 11. This reduces the airflow entering the headlight per unit time and also reduces the total amount of moisture entering the headlight per unit time, preventing a large amount of airflow (especially water vapor) from entering the headlight instantly and effectively suppressing the occurrence of fogging inside the headlight.

[0038] Preferably, the distance between the air exchange port 11 and the air outlet 32 ​​is greater than 0; and / or The width of the air outlet channel 101 formed between the side wall 121 of the mounting groove 12 and the air outlet 32 ​​is greater than 0.1 mm. It should be noted that the width of the air outlet channel 101 is the width between the side wall 121 of the mounting groove 12 and the side of the corresponding relief portion 31 of the pressure plate structure 30.

[0039] Combination Figure 3 , Figures 7-8 By rationally designing the width of the air outlet channel 101, the obstruction effect of the air inlet 32 ​​caused by the valve body 10 and the pressure plate structure 30 is reduced, thereby ensuring the ventilation effect of the headlight. For example, the air outlet channel 101 is obtained by the pressure plate structure 30 making room, that is, a clearance portion 31 is formed on the pressure plate structure 30 to form a gap with the side wall 121 of the mounting groove 12. Thus, the air inlet 32 ​​can achieve gas exchange with the internal and external environment of the headlight through this gap. Of course, in contrast, this gap (air outlet channel 101) can also be obtained by the valve body 10 making room, which will not be elaborated here.

[0040] It should be emphasized that the 0.1mm limit in this application is based on the processing precision of the injection molding process, but it does not mean that the gap width cannot be a value between 0 and 0.1mm. That is, 0-0.1mm should also fall within the protection scope of this application, but it is preferred to be greater than 0.1mm. In addition, by setting the distance between the air exchange port 11 and the air passage port 32 to be greater than 0, the overlapping of their positions is avoided. That is, the air exchange port 11 and the air passage port 32 are staggered in the axial direction of the valve body 10, so as to prolong the process of airflow entering and exiting the headlight anti-fog device, avoid the airflow going straight in and out, and thus reduce the risk of fogging inside the headlight.

[0041] Preferably, the pressure plate structure 30 includes a body portion 34 and a plurality of support portions; a clearance portion 31 is formed on the edge of the body portion 34 near the side wall 121 of the mounting groove 12; the plurality of support portions are disposed on the side of the body portion 34 facing the film member 20; the plurality of support portions are arranged around the edge of the body portion 34 and together with the body portion 34 form a receiving cavity 33; the plurality of support portions are spaced apart from each other to form an air passage 32; wherein, when the airflow moves from the airflow interaction channel 13 toward the air exchange port 11, the film member 20 is deformed toward the receiving cavity 33 to open the air exchange port 11.

[0042] Furthermore, the sum of the opening areas of the vents 32 accounts for 5-50% of the sum of the surface areas of the multiple supports. For example, the sum of the opening areas accounts for 5%, 10%, 15%, 50% of the sum of the surface areas of the multiple supports, and any value within this range.

[0043] Preferably, the plurality of support portions include a first support portion and a second support portion 37; the first support portion is disposed on the clearance portion 31; the second support portion 37 is disposed around the edge of the body portion 34 outside the clearance portion 31, and the second support portion 37 is spaced apart from the first support portion; wherein, during the process of airflow flowing out from the airflow interaction channel 13 toward the air exchange port 11, at least a portion of the structure of the film member 20 deforms toward the gap formed between the first support portion and the second support portion 37, so that the air outlet channel 101 communicates with the air exchange port 11.

[0044] In a specific example, there is one second support 37, which is continuously arranged around the edge of the main body 34. There is one relief part 31 on the main body 34, which is formed on one side edge of the main body 34. There is also one first support, which is arranged on the edge of the main body 34 corresponding to the relief part 31. Thus, during the air outlet process, the edge of the film member 20 is pressed by the first support and the second support 37 respectively, while the middle part of the film member 20 deforms towards the receiving cavity 33 under the action of airflow to open the air exchange port 11.

[0045] Furthermore, under the continuous action of the airflow, part of the structure at the edge enters the gap formed between the first support and the second support 37, and then lifts up, thereby realizing the connection between the air outlet 101 and the air exchange port 11.

[0046] See Figure 6 In another embodiment, there may be multiple first support portions. For ease of understanding, the first support portions adjacent to the second support portion 37 are defined as support portion one 35 and support portion two 36. Support portion one 35 is spaced apart from one end of the second support portion 37, and support portion two 36 is similarly spaced apart from the other end of the second support portion 37. Thus, a first gap 102 is formed between one end of support portion one 35 and the second support portion 37, and a second gap 103 is formed between the other end of support portion two 36 and the second support portion 37. Furthermore, a third gap 104 is formed between support portion one 35 and support portion two 36. The air vent 32 includes the first gap 102, the second gap 103, and the third gap 104.

[0047] In conjunction with the aforementioned airflow process, when the airflow exits from the airflow interaction channel 13 through the air exchange port 11, the edge of the diaphragm 20 is pressed by the first support 35, the second support 36, and the second support 37, while the middle portion of the diaphragm 20 is deformed towards the receiving cavity 33 by the airflow, thereby changing the diaphragm 20 from a blocked state to an open state. Under the continuous impact of the airflow, the airflow diffuses from the middle portion of the diaphragm 20 towards its edge portion, creating a force that carries the diaphragm 20 away from the plane attached to the air exchange port 11, thus forming an exhaust channel.

[0048] Based on the arrangement of the first and second support parts 37 on the main body 34, the portions of the diaphragm 20 corresponding to the first spacing 102, the second spacing 103, and the third spacing 104 are not compressed, causing them to be lifted towards the main body 34. This opens the exhaust openings that connect to the exhaust passage and the air outlet passage 101, respectively. When the air pressure inside the headlight is high, the opening of the exhaust opening increases, improving the exhaust efficiency. The exhaust opening is located within the area enclosed by the air inlet 32.

[0049] See Figure 1 , Figure 5 Preferably, the valve body 10 forms a recess 14 in the mounting groove 12, and the air exchange port is formed in the recess; along the positive projection direction of the recess 14, the diaphragm 20 covers the recess 14; wherein, when the diaphragm 20 deforms toward the direction close to the recess 14, an air intake gap communicating with the air exchange port 11 is formed between the diaphragm 20 and the recess 14.

[0050] Preferably, the distance between any end of the settling tank and the air outlet is greater than 0; and / or The depth of the settling groove 14 is greater than 0.1 mm. Specifically, the depth of the settling groove 14 is any value greater than 0.1 mm without penetrating the valve body 10.

[0051] Specifically, under the negative pressure inside the headlight, the diaphragm 20 is adsorbed onto the ventilation port 11. If the pressure difference between the inside and outside of the headlight is too large, and given the small opening of the ventilation port 11 on the valve body 10, the ventilation port 11 is easily completely blocked by the diaphragm 20. At this time, the airflow cannot enter the airflow interaction channel 13 in time, thus failing to balance the air pressure inside and outside the headlight. This results in the headlight being in a negative pressure state for a long time, which can easily damage the internal components of the headlight.

[0052] Therefore, to ensure that the airflow outside the headlight can enter the headlight to balance the air pressure, a groove 14 is provided on the valve body 10 at the position corresponding to the air exchange port 11. By combining the groove 14 and the air exchange port 11, the diaphragm element 20 is prevented from undergoing concentrated deformation at the air exchange port 11. That is, under the action of extreme negative pressure, the diaphragm element 20 deforms towards both the groove 14 and the air exchange port 11, preventing the diaphragm element 20 from completely blocking the air exchange port 11. This ensures that the air intake process proceeds smoothly and prevents the headlight from being in a negative pressure state for a long time.

[0053] Furthermore, during the air intake process, the diaphragm component 20 is subjected to negative pressure, causing the middle part to deform towards the groove 14 and the air exchange port 11, while the edge part of the diaphragm component 20 deforms away from the bottom surface of the mounting groove 12, i.e., it is raised. Thus, the airflow passes through the air outlet 101 and the air outlet 32, and enters the first air intake channel formed between the raised part of the diaphragm component 20 and the bottom surface of the mounting groove 12. Then, it passes through the second air intake channel between the diaphragm component 20 and the groove 14, and finally enters the airflow interaction channel 13 through the air exchange port 11, thereby achieving the effect of balancing the air pressure inside and outside the headlight.

[0054] For example, the settling tank 14 can be in the shape of a cross.

[0055] Combination Figure 3 Preferably, there are multiple clearance portions 31; clearance portions 31 are symmetrically provided on both sides along the length direction of the pressure plate structure 30; and / or, clearance portions 31 are symmetrically provided on both sides along the width direction of the pressure plate structure 30.

[0056] Combination Figure 2 Preferably, the valve body 10 has a filling groove 15 for containing desiccant on the side away from the diaphragm 20; the vehicle headlight anti-fog device also includes a first waterproof and breathable membrane 41 that covers the filling groove 15.

[0057] Preferably, an air exchange structure 16 with an airflow interaction channel 13 is formed in the filling groove 15; the circumferential surface of the air exchange structure 16 is provided with reinforcing ribs 17 that are connected to the bottom or inner wall of the filling groove 15.

[0058] Preferably, the vehicle headlight anti-fog device further includes a second waterproof and breathable membrane 42, which covers the opening of the mounting groove 12.

[0059] On the other hand, this embodiment of the invention also provides a vehicle lamp structure, specifically, the vehicle lamp structure includes the vehicle lamp anti-fog device as described in the above embodiments. Correspondingly, in this embodiment, the technical effects corresponding to any of the technical solutions in the above embodiments can be achieved, and will not be repeated here.

[0060] Although the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A vehicle headlight anti-fog device, characterized in that, include: A valve body (10) is provided with a mounting groove (12) on one side, and a ventilation port (11) is formed on the bottom surface of the mounting groove (12). The ventilation port (11) is connected to an airflow interaction channel (13) that runs through the valve body (10). A film element (20) is installed in the mounting groove (12) to cover the ventilation port (11); A pressure plate structure (30) is disposed on the surface of the film part (20), and the pressure plate structure (30) is provided with a relief part (31) that forms an air outlet channel (101) between the side wall (121) of the mounting groove (12), and the pressure plate structure (30) is provided with an air outlet (32) communicating with the air outlet channel (101) at a position corresponding to the relief part (31); The pressure plate structure (30) has a receiving cavity (33) on the side near the film (20) to accommodate the deformation of the film (20); During the process of airflow flowing out from the airflow interaction channel (13) toward the air exchange port (11), the thin film (20) on the air exchange port (11) opens; during the process of airflow flowing into the airflow interaction channel (13) from the air outlet channel (101), the air exchange port (11) is partially blocked by the thin film (20).

2. The vehicle headlight anti-fog device according to claim 1, characterized in that, The distance between the ventilation port (11) and the air outlet (32) is greater than 0; and / or The width of the air outlet channel (101) formed between the sidewall (121) of the mounting groove (12) and the air outlet (32) is greater than 0.1 mm.

3. The vehicle headlight anti-fog device according to claim 1, characterized in that, The pressure plate structure (30) includes a main body (34) and multiple support parts; The clearance portion (31) is formed at the edge of the side wall (121) of the main body portion (34) near the mounting groove (12); The plurality of support portions are disposed on the side of the body portion (34) facing the film member (20), the plurality of support portions are arranged around the edge of the body portion (34), and together with the body portion (34) form a receiving cavity (33); The plurality of support portions are spaced apart to form the air vent (32); The sum of the opening areas of the air vents (32) accounts for 5-50% of the sum of the surface areas of the plurality of support parts.

4. The vehicle headlight anti-fog device according to claim 3, characterized in that, The plurality of support portions include a first support portion and a second support portion (37); The first support portion is disposed on the clearance portion (31); The second support portion (37) is disposed around the edge of the main body portion (34) other than the clearance portion (31), and the second support portion (37) is spaced apart from the first support portion; During the process of airflow flowing out from the airflow interaction channel (13) toward the air exchange port (11), at least a portion of the structure of the thin film (20) deforms toward the gap formed between the first support portion and the second support portion (37) so that the air outlet channel (101) communicates with the air exchange port (11).

5. The vehicle headlight anti-fog device according to claim 4, characterized in that, There are multiple first support parts, and the first support parts that are adjacent to the second support part (37) are defined as support part one (35) and support part two (36); The support part (35) and the second support part (37) are spaced apart at one end, forming a first gap (102) between them; The second support part (36) and the other end of the second support part (37) are spaced apart, forming a second gap (103) between them; A third gap (104) is formed between the first support part (35) and the second support part (36), and the air outlet (32) includes the first gap (102), the second gap (103) and the third gap (104).

6. The vehicle headlight defogging device according to any one of claims 1-5, characterized in that, The valve body (10) forms a recess (14) in the mounting groove (12), and the air vent (11) is formed in the recess (14); Along the forward projection direction of the settling tank (14), the film element (20) covers the settling tank (14); When the film (20) deforms toward the sink (14), an air intake gap is formed between the film (20) and the sink (14) to connect with the air exchange port (11).

7. The vehicle headlight anti-fog device according to claim 6, characterized in that, The distance between any end of the settling tank (14) and the air outlet (32) is greater than 0; and / or The depth of the settling trough (14) is greater than 0.1 mm.

8. The vehicle headlight defogging device according to any one of claims 1-5, characterized in that, There are multiple receptacles (31); The clearance portion (31) is symmetrically provided on both sides along the length direction of the pressure plate structure (30); and / or, the clearance portion (31) is symmetrically provided on both sides along the width direction of the pressure plate structure (30).

9. The vehicle headlight anti-fog device according to claim 1, characterized in that, The valve body (10) has a filling groove (15) for containing desiccant on the side away from the diaphragm (20); The vehicle headlight anti-fog device also includes a first waterproof and breathable membrane (41) covering the filling groove (15); and / or An air exchange structure (16) with the airflow interaction channel (13) is formed within the filling groove (15); the circumferential surface of the air exchange structure (16) is provided with reinforcing ribs (17) that are connected to the bottom or inner wall of the filling groove (15); and / or The vehicle headlight anti-fog device also includes a second waterproof and breathable membrane (42), which covers the opening of the mounting groove (12).

10. A vehicle lamp structure, characterized in that, include: The vehicle headlight anti-fog device as described in any one of claims 1-9.

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