Anti-fog device, vehicle lamp and vehicle

Abstract

The utility model relates to an antifogging device, a vehicle lamp and a vehicle, the antifogging device comprises an antifogging body arranged on the vehicle lamp, a lamp cavity is formed on one side of the antifogging body, a two-way valve is arranged on the antifogging body, and the two-way valve is arranged on the antifogging body. The two-way valve has first opening pressure for exhausting gas in the lamp cavity to the outside atmosphere and second opening pressure for introducing gas into the lamp cavity from the outside atmosphere, and the first opening pressure is smaller than the second opening pressure. The exhaust pressure when the lamp cavity exhausts air to the outside atmosphere is the first opening pressure, the air inlet pressure when the outside atmosphere enters the lamp cavity is the second opening pressure, and the first opening pressure is smaller than the second opening pressure, so that the probability that the outside atmosphere enters the lamp cavity is reduced, and the service life of the lamp cavity is prolonged. Therefore, the probability that moisture in the outside air enters the lamp cavity is reduced, the fogging probability of the lamp cavity is reduced, and the anti-fogging capacity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an anti-fog device, a vehicle lamp and a vehicle. Background Art

[0002] Vehicle lamps are used for lighting while the vehicle is in motion, and they play a key role in the safety of the vehicle and the people inside it. Among them, fogging of vehicle lamps is a difficult problem in the industry. In order to reduce the probability of vehicle fogging, the existing technology will install different forms of breathable structures (breathable caps, breathable membranes, etc.) on the lamps, but the anti-fogging ability of these breathable structures is relatively low. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an anti-fog device, a vehicle lamp and a vehicle, which can improve the anti-fog capability.

[0004] To achieve the above-mentioned purpose, the utility model provides an anti-fog device, including an anti-fog body arranged on a vehicle lamp, one side of the anti-fog body forming a lamp cavity, a two-way valve being arranged on the anti-fog body, the two-way valve having a first opening pressure for exhausting the gas in the lamp cavity to the outside atmosphere and a second opening pressure for the outside atmosphere to intake the lamp cavity, the first opening pressure being less than the second opening pressure.

[0005] In an embodiment of the present invention, an elastic membrane and a first through hole are further provided on the anti-fog body, the elastic membrane covers the first through hole, and the elastic membrane is sealed to the edge of the first through hole.

[0006] In one embodiment of the utility model, a shell is provided on the anti-fog body, a first external cavity is formed between the shell and the anti-fog body, the elastic membrane is located in the first external cavity, and the first external cavity is connected to the external atmosphere.

[0007] In an embodiment of the present invention, the direction from the lamp cavity to the first external cavity is a first direction, and the elastic membrane is an air bag with a telescopic function along the first direction.

[0008] In one embodiment of the present invention, the airbag includes a plurality of connecting films connected in sequence, and the plurality of connecting films are folded or stretched along the first direction.

[0009] In an embodiment of the present invention, a ventilation mechanism is provided on the shell, and the ventilation mechanism connects the first external cavity with the external atmosphere.

[0010] In one embodiment of the utility model, the ventilation mechanism includes a ventilation membrane and a second through hole arranged on the shell, the ventilation membrane covers the second through hole, and the ventilation membrane and the edge of the second through hole are sealed, and the ventilation membrane is provided with a ventilation hole for connecting the first external cavity with the external atmosphere.

[0011] In one embodiment of the utility model, a shell is formed on the anti-fog body, a piston channel is provided on the shell, a piston is provided in the piston channel, the piston divides the piston channel into a first chamber and a second chamber, the first chamber is connected to the lamp cavity, the second chamber forms a second external cavity, and the second external cavity is connected to the external atmosphere.

[0012] In one embodiment of the utility model, the piston is provided with multiple sub-chambers between two adjacent pistons, the first chamber is formed between the piston close to the lamp cavity and the piston channel, and the second chamber is formed between the piston close to the external cavity and the piston channel.

[0013] In an embodiment of the present invention, an adsorption mechanism is disposed in the lamp cavity, and the adsorption mechanism is used to absorb moisture in the lamp cavity.

[0014] In an embodiment of the present invention, the anti-fog device is a plastic part.

[0015] On the other hand, a vehicle lamp is provided, comprising the above-mentioned anti-fog device, wherein the vehicle lamp comprises a lamp housing, and the anti-fog device is arranged on the lamp housing.

[0016] In one embodiment of the utility model, a first mounting portion is provided on the lamp housing, and a second mounting portion is provided on the anti-fog body, and the first mounting portion and the second mounting portion are connected and separated by relative rotation of the lamp housing and the anti-fog body.

[0017] On the other hand, a vehicle is provided, comprising the above-mentioned anti-fog device or vehicle lamp.

[0018] The above technical solution of the utility model has the following advantages compared with the prior art:

[0019] (1) The exhaust pressure when the lamp cavity of the utility model is exhausted to the outside atmosphere is the first opening pressure. When the pressure of the lamp cavity minus the pressure of the outside atmosphere is greater than the first opening pressure, the two-way valve will allow the exhaust of the lamp cavity to the outside atmosphere, and will not allow the outside atmosphere to enter the lamp cavity; the intake pressure when the outside atmosphere enters the lamp cavity is the second opening pressure. When the pressure of the outside atmosphere minus the pressure of the lamp cavity is greater than the second opening pressure, the two-way valve will allow the outside atmosphere to enter the lamp cavity, and will not allow the exhaust of the lamp cavity to the outside atmosphere. By setting the two-way valve, the first opening pressure is smaller than the second opening pressure, that is, the first opening pressure for exhausting the gas in the lamp cavity to the outside atmosphere is smaller than the second opening pressure for the outside atmosphere to enter the lamp cavity, thereby reducing the probability of the outside atmosphere entering the lamp cavity, and thus reducing the probability of moisture in the outside gas entering the lamp cavity, reducing the probability of fogging of the lamp cavity, and improving the anti-fog capability.

[0020] (2) The interior of the shell provided on the anti-fog body of the present application forms a first external cavity, and the elastic membrane is located in the first external cavity of the shell. The shell can protect the elastic membrane and prevent the elastic membrane from being damaged by collision with external objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a first structural schematic diagram of the anti-fog device of the utility model;

[0023] Figure 2 It is a second structural schematic diagram of the anti-fog device of the utility model;

[0024] Figure 3 It is a third structural schematic diagram of the anti-fog device of the utility model;

[0025] Figure 4 It is a fourth structural schematic diagram of the anti-fog device of the utility model;

[0026] Figure 5 It is a fifth structural schematic diagram of the anti-fog device of the utility model;

[0027] Figure 6 It is a structural schematic diagram of the piston channel and the piston of the anti-fog device of the utility model;

[0028] Figure 7It is a schematic diagram of the connection structure between the anti-fog device and the lamp housing of the utility model.

[0029] Description of the Figures in the Specification:

[0030] 1. Anti-fog body; 2. Lamp cavity; 3. External atmosphere; 4. Two-way valve; 5. Elastic membrane; 6. First through hole; 7. Shell; 8. First external cavity; 9. Breathable mechanism; 10. Piston channel; 11. Piston; 12. First chamber; 13. Second chamber; 14. Sub-chamber; 15. Adsorption mechanism; 16. Lamp housing; 17. Second through hole; 18. Sealing ring; 19. First mounting part; 20. Second mounting part; 21. Mounting surface; 22. Connecting membrane; 23. Breathable membrane. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Embodiment 1

[0033] Reference Figure 1 to Figure 6 As shown, the anti-fog device of the utility model includes an anti-fog body 1 arranged on a vehicle lamp, one side of the anti-fog body 1 forms a lamp cavity 2, and a two-way valve 4 is arranged on the anti-fog body 1. The two-way valve 4 has a first opening pressure for exhausting the gas in the lamp cavity 2 to the outside atmosphere 3 and a second opening pressure for the outside atmosphere 3 to take in the lamp cavity 2, and the first opening pressure is less than the second opening pressure.

[0034] The anti-fog device of the present application comprises an anti-fog body 1, which is arranged on a vehicle lamp, and the anti-fog function of the vehicle lamp is realized by the anti-fog body 1. Figure 1As shown, one side of the anti-fog body 1 forms a lamp cavity 2, and the lamp cavity 2 is the cavity of the vehicle lamp, and the other side of the anti-fog body 1 is the outside atmosphere 3. Therefore, the anti-fog body 1 is arranged between the lamp cavity 2 and the outside atmosphere 3, and the anti-fog body 1 serves as a switch for connecting and disconnecting the lamp cavity 2 and the outside atmosphere 3, that is, the exhaust or intake function between the lamp cavity 2 and the outside atmosphere 3 is realized through the anti-fog body 1. Further, a two-way valve 4 is arranged on the anti-fog body 1, that is, the two-way valve 4 can be used to exhaust the lamp cavity 2 to the outside atmosphere 3, and the outside atmosphere 3 can also be used to intake air into the lamp cavity 2, and the two-way valve 4 is used to make the lamp cavity 2 and the outside atmosphere 3 have an opening pressure when exhausting or intake air, that is, whether the lamp cavity 2 is exhausted to the outside atmosphere 3 or the outside atmosphere 3 is taken into the lamp cavity 2, the connection between the lamp cavity 2 and the outside atmosphere 3 is allowed only when a certain pressure is met. Furthermore, the exhaust pressure when the lamp cavity 2 is exhausting to the external atmosphere 3 is the first opening pressure. When the pressure of the lamp cavity 2 minus the pressure of the external atmosphere 3 is greater than the first opening pressure, the two-way valve 4 will allow the lamp cavity 2 to exhaust to the external atmosphere 3, and will not allow the external atmosphere 3 to intake into the lamp cavity 2; the intake pressure when the external atmosphere 3 intakes into the lamp cavity 2 is the second opening pressure. When the pressure of the external atmosphere 3 minus the pressure of the lamp cavity 2 is greater than the second opening pressure, the two-way valve 4 will allow the external atmosphere 3 to intake into the lamp cavity 2, and will not allow the lamp cavity 2 to exhaust to the external atmosphere 3. In order to improve the anti-fog ability of the anti-fog body 1, a two-way valve 4 is provided so that the first opening pressure is less than the second opening pressure, that is, the first opening pressure for exhausting the gas in the lamp cavity 2 to the outside atmosphere 3 is less than the second opening pressure for the outside atmosphere 3 to enter the lamp cavity 2, thereby reducing the probability of the outside atmosphere 3 entering the lamp cavity 2, and thus reducing the probability of moisture in the outside gas entering the lamp cavity 2, reducing the fogging probability of the lamp cavity 2, and improving the anti-fog ability. In addition, the structural parts of the present application are all plastic parts.

[0035] In one embodiment, an elastic membrane 5 and a first through hole 6 are further provided on the anti-fog body 1 . The elastic membrane 5 covers the first through hole 6 , and the elastic membrane 5 is sealed to the edge of the first through hole 6 .

[0036] In order to further improve the anti-fog capability of the anti-fog device, the present application adds an elastic membrane 5 on the basis of the two-way valve 4. Specifically, the elastic membrane 5 is located between the lamp cavity 2 and the outside atmosphere 3, and the elastic membrane 5 is arranged on the anti-fog body 1. The anti-fog body 1 is also provided with a first through hole 6, and the elastic membrane 5 covers the edge of the first through hole 6, and the elastic membrane 5 is sealed with the edge of the first through hole 6, such as Figure 2As shown. Since the elastic membrane 5 is elastic and is located between the lamp cavity 2 and the outside atmosphere 3, when there is a pressure difference between the lamp cavity 2 and the outside atmosphere 3, the elastic membrane 5 can adjust its own volume under the pressure difference to balance the pressure difference between the lamp cavity 2 and the outside atmosphere 3. In addition, the elastic membrane 5 also isolates the lamp cavity 2 from the outside atmosphere 3. When the two-way valve 4 is not opened, the elastic membrane 5 can not only balance the pressure difference between the lamp cavity 2 and the outside atmosphere 3, but also directly avoid the connection between the outside atmosphere 3 and the lamp cavity 2, and avoid moisture in the outside atmosphere 3 from entering the lamp cavity 2, further improving the anti-fog ability. Among them, the maximum volume adjustment amount of the elastic membrane 5 is determined by the size of the lamp cavity 2, the highest temperature and the lowest ambient temperature when the lamp is working, and can be adjusted according to actual conditions. In addition, when balancing the pressure difference between the lamp cavity 2 and the outside atmosphere 3, the elastic membrane 5 is first used to balance the pressure difference between the lamp cavity 2 and the outside atmosphere 3 by expanding and contracting the elastic membrane 5. When the pressure difference between the lamp cavity 2 and the outside atmosphere 3 exceeds the adjustment range of the elastic membrane 5, the two-way valve 4 opens under the pressure difference to prevent damage to the lamp due to excessive pressure difference. Therefore, the elastic membrane 5 is equivalent to a primary balancing mechanism, and the two-way valve 4 is a secondary balancing mechanism, which plays a dual role in regulating the pressure difference between the lamp cavity 2 and the outside atmosphere 3, effectively improving the anti-fog ability.

[0037] In one embodiment, a shell 7 is provided on the anti-fog body 1 , a first external cavity 8 is formed between the shell 7 and the anti-fog body 1 , the elastic membrane 5 is located in the first external cavity 8 , and the first external cavity 8 is connected to the external atmosphere 3 .

[0038] like Figure 1-Figure 5 As shown, a shell 7 is provided on the anti-fog body 1, and the shell 7 and the anti-fog body 1 are integrally formed or separately designed, and the shell 7 is provided on the side of the anti-fog body 1 away from the lamp cavity 2. The interior of the shell 7 forms a first external cavity 8, and the elastic membrane 5 is located on the side of the anti-fog body 1 away from the lamp cavity 2, and the elastic membrane 5 is located in the first external cavity 8 of the shell 7. The shell 7 can protect the elastic membrane 5 and prevent the elastic membrane 5 from being damaged by collision with external objects. The first external cavity 8 is connected to the external atmosphere 3, so that the air pressure of the lamp cavity 2 and the external atmosphere 3 can be balanced through the elastic membrane 5.

[0039] In one embodiment, the direction from the lamp cavity 2 to the first external cavity 8 is a first direction, and the elastic membrane 5 is an air bag with a telescopic function along the first direction.

[0040] The direction from the lamp cavity 2 to the first external cavity 8 is defined as the first direction. Figure 3The direction indicated by the middle arrow is the first direction along the axial direction of the anti-fog body 1. Preferably, the elastic membrane 5 is an airbag that can be extended and retracted along the first direction, and the airbag is located between the lamp cavity 2 and the outside atmosphere 3. When the air pressure in the lamp cavity 2 is greater than the outside atmosphere 3, the airbag extends along the first direction to adjust the pressure difference between the lamp cavity 2 and the outside atmosphere 3, so that the air pressure in the lamp cavity 2 is equal to the outside atmospheric pressure; when the air pressure in the lamp cavity 2 is less than the outside atmospheric pressure, the airbag contracts along the first direction to adjust the pressure difference between the lamp cavity 2 and the outside atmosphere 3, so that the air pressure in the lamp cavity 2 is equal to the outside atmospheric pressure, and the airbag isolates the outside atmosphere 3 from the lamp cavity 2, preventing moisture in the outside atmosphere 3 from entering the lamp cavity 2, thereby improving the anti-fog ability. Preferably, the extension direction of the airbag is along the first direction, so that the extension direction of the airbag is along the pressure difference direction between the lamp cavity 2 and the outside atmosphere 3, which is convenient for air pressure balance.

[0041] In one embodiment, the airbag includes a plurality of connection films 22 connected in sequence, and the plurality of connection films 22 are folded or stretched along the first direction.

[0042] like Figure 3 As shown, the airbag includes a plurality of connecting films 22, and the plurality of connecting films 22 are arranged in an array along a first direction, and two adjacent connecting films 22 are connected to each other, and the side of the connecting film 22 close to the lamp cavity 2 and close to the anti-fog body 1 is sealed and connected to the anti-fog body 1, and the side of the connecting film 22 farthest from the lamp cavity 2 along the first direction and far away from the anti-fog body 1 is a closed structure, so that the airbag can be folded or stretched along the first direction, which not only prevents moisture in the external atmosphere 3 from entering the lamp cavity 2 and improves the anti-fog ability, but the folding or stretching of the airbag can also balance the air pressure between the lamp cavity 2 and the external atmosphere 3.

[0043] In one embodiment, a ventilation mechanism 9 is disposed on the shell 7 , and the ventilation mechanism 9 connects the first external cavity 8 with the external atmosphere 3 .

[0044] The shell 7 on the anti-fog body 1 protects the elastic membrane 5. In order to connect the outside atmosphere 3 with the first outside cavity 8, a second through hole 17 is provided on the shell 7. The second through hole 17 connects the first outside cavity 8 with the outside atmosphere 3. Figure 2-Figure 5 As shown, a ventilation mechanism 9 is arranged on the shell 7, and the ventilation mechanism 9 includes a ventilation membrane 23 and a second through hole 17. The ventilation membrane 23 covers around the second through hole 17, and the ventilation membrane 23 is sealed with the edge of the second through hole 17. The ventilation holes are arranged on the ventilation membrane 23. The first external cavity 8 can be connected with the external atmosphere 3 through the ventilation holes, and the ventilation membrane 23 can prevent particulate matter and the like from entering the shell 7.

[0045] In one embodiment, a shell 7 is formed on the anti-fog body 1, and a piston channel 10 is provided on the shell 7. A piston 11 is provided in the piston channel 10, and the piston 11 divides the piston channel 10 into a first chamber 12 and a second chamber 13. The first chamber 12 is connected to the lamp cavity 2, and the second chamber 13 forms a second external cavity, which is connected to the external atmosphere 3.

[0046] like Figure 4 As shown, a shell 7 is provided on the anti-fog body 1, and the shell 7 and the anti-fog body 1 are integrally formed or the shell 7 and the anti-fog body 1 are designed separately, and the shell 7 is provided on the anti-fog body 1 on a side away from the lamp cavity 2. Specifically, a piston channel 10 is provided on the shell 7, and a piston 11 is slidably provided in the piston channel 10, so that the piston 11 can slide in the piston channel 10 to adjust the pressure difference between the lamp cavity 2 and the outside atmosphere 3 by sliding the piston 11 in the piston channel 10. Further, the piston 11 divides the piston channel 10 into two chambers in the piston channel 10, including a first chamber 12 and a second chamber 13, the first chamber 12 is located on one side of the piston 11, and the second chamber 13 is located on the other side of the piston 11, and the first chamber 12 is connected to the lamp cavity 2 through the first through hole 6, and the second chamber 13 forms a second external cavity, and the second external cavity is connected to the outside atmosphere 3 through the corresponding air permeable mechanism 9 (air permeable membrane and second through hole). Therefore, when the air pressure in the lamp cavity 2 is greater than the external atmospheric pressure, the piston 11 moves in the piston channel 10 in a direction away from the lamp cavity 2, the volume of the first chamber 12 increases, and the volume of the second chamber 13 decreases, so as to adjust the pressure difference between the lamp cavity 2 and the external atmosphere 3, so that the air pressure in the lamp cavity 2 is equal to the external atmospheric pressure; when the air pressure in the lamp cavity 2 is less than the external atmospheric pressure, the piston 11 moves in the piston channel 10 in a direction close to the lamp cavity 2, the volume of the first chamber 12 decreases, and the volume of the second chamber 13 increases, so as to adjust the pressure difference between the lamp cavity 2 and the external atmosphere 3, so that the air pressure in the lamp cavity 2 is equal to the external atmospheric pressure, and the piston 11 isolates the external atmosphere 3 from the lamp cavity 2, prevents moisture in the external atmosphere 3 from entering the lamp cavity 2, and improves the anti-fog capability. Preferably, the sliding direction of the piston 11 in the piston channel 10 is along the first direction, so that the sliding direction of the piston 11 in the piston channel 10 is along the pressure difference direction between the lamp cavity 2 and the outside atmosphere 3, which is convenient for air pressure balance. Among them, the axis of the piston channel 10 is preferably arranged parallel to the axis of the anti-fog body 1.

[0047] In one embodiment, the piston 11 is provided in plurality, and a sub-chamber 14 is formed between two adjacent pistons 11 , the first chamber 12 is formed between the piston 11 close to the lamp cavity 2 and the piston channel 10 , and the second chamber 13 is formed between the piston 11 far from the lamp cavity 2 and the piston channel 10 .

[0048] The piston 11 may be worn during use, which may cause the piston 11 to get stuck in the piston channel 10, or the gap between the piston 11 and the piston channel 10 may become larger, thereby causing moisture in the outside atmosphere 3 to enter the lamp cavity 2. Figure 4 As shown, a plurality of pistons 11 are arranged in the piston channel 10, and a sub-chamber 14 is formed between any two adjacent pistons 11, and a first chamber 12 is formed between the piston 11 close to the lamp cavity 2 and the piston channel 10, and a second chamber 13 is formed between the piston 11 away from the lamp cavity and the piston channel 10, the first chamber 12 is communicated with the lamp cavity 2, and the second chamber 13 (second external cavity) is communicated with the external atmosphere 3. Therefore, when the air pressure in the lamp cavity 2 is greater than the external atmospheric pressure, all the pistons 11 move in the direction away from the lamp cavity 2 in the piston channel 10, the volume of the first chamber 12 increases, the volume of the second chamber 13 decreases, and the volume of the sub-chamber 14 decreases, so as to adjust the pressure difference between the lamp cavity 2 and the external atmosphere 3, so that the air pressure in the lamp cavity 2 is equal to the external atmospheric pressure; when the air pressure in the lamp cavity 2 is less than the external atmospheric pressure, all the pistons 11 move in the direction close to the lamp cavity 2 in the piston channel 10, the first chamber 12 increases, the volume of the second chamber 13 decreases, and the volume of the sub-chamber 14 decreases. The volume of the chamber 12 becomes smaller, the volume of the second chamber 13 becomes larger, and the volume of the sub-chamber 14 becomes smaller, so as to adjust the pressure difference between the lamp cavity 2 and the outside atmosphere 3, so that the air pressure in the lamp cavity 2 is equal to the outside atmospheric pressure, and the piston 11 isolates the outside atmosphere 3 from the lamp cavity 2, and prevents moisture in the outside atmosphere 3 from entering the lamp cavity 2, thereby improving the anti-fog ability, and when one of the pistons fails to work, the remaining pistons can work normally, and can isolate the outside atmosphere 3 from the lamp cavity 2, thereby effectively improving the anti-fog ability. Preferably, the sliding direction of the piston close to the lamp cavity 2 and the piston close to the outside atmosphere 3 in the piston channel 10 are both along the axial direction of the anti-fog body 1, so that the sliding direction of the piston close to the lamp cavity 2 and the piston close to the outside atmosphere 3 in the piston channel 10 is along the pressure difference direction between the lamp cavity 2 and the outside atmosphere 3, which is convenient for air pressure balance. In addition, the structure of the piston 11 and the piston channel 10 can also be as follows Figure 6 As shown, with a bent structure, the sliding stroke of the piston can be increased and the pressure difference balancing ability can be improved.

[0049] In one embodiment, an adsorption mechanism 15 is disposed in the lamp cavity 2 , and the adsorption mechanism 15 is used to absorb moisture in the lamp cavity 2 .

[0050] like Figure 1-Figure 5 As shown, an adsorption mechanism 15 is disposed in the lamp cavity 2 , and the adsorption mechanism 15 uses a mechanism such as a desiccant that can absorb moisture in the lamp cavity 2 , including moisture in the initial state of a new lamp and moisture that may enter from the external atmosphere 3 .

[0051] Embodiment 2

[0052] A vehicle lamp is provided, comprising the above-mentioned anti-fog device. The vehicle lamp comprises a lamp housing 16 , and the anti-fog device is arranged on the lamp housing 16 .

[0053] The anti-fog device is directly installed on the vehicle lamp. Figure 1-Figure 5 As shown, the vehicle lamp includes a lamp housing 16, a first mounting portion 19 is provided on the lamp housing 16, and a second mounting portion 20 is provided on the anti-fog body 1. The anti-fog device and the vehicle lamp are installed by the cooperation of the first mounting portion 19 and the second mounting portion 20. Further, the connection structure between the anti-fog device and the lamp housing is as shown in FIG. Figure 7 As shown, the first mounting portion 19 is a slot, and the second mounting portion 20 is a block. A transition slope is provided on the block, and the anti-fog device is connected to the lamp housing through the cooperation of the slot, the block and the transition slope. The installation process of the anti-fog body 1 and the lamp housing 16 is as follows: rotate the anti-fog body 1 so that the block on the anti-fog body 1 corresponds to the card slot on the lamp housing 16 one by one, and align the axis of the anti-fog body 1 with the axis of the lamp housing 16, move the anti-fog body 1 so that the anti-fog body 1 moves close to the lamp housing 16 along the axis direction of the lamp housing 16, further make the block on the anti-fog body 1 pass through the corresponding card slot on the lamp housing 16, and then rotate the anti-fog body 1, the transition inclined surface on the block first contacts with the mounting surface 21 on the lamp housing 16 away from the anti-fog body 1, continue to rotate the anti-fog body 1, under the action of the transition inclined surface, the anti-fog body 1 also moves close to the lamp housing 16 along the axis direction of the lamp housing 16 under the action of the transition inclined surface, when the mounting surface 21 is completely separated from the transition inclined surface, the movement of the anti-fog body 1 close to the lamp housing 16 along the axis direction of the lamp housing 16 stops, and the installation of the anti-fog device and the vehicle lamp is completed (or continue to rotate the anti-fog body 1 at a certain angle to improve the connection stability). Alternatively, the first mounting portion 19 is a threaded hole, and the second mounting portion 20 is an external thread, which is spirally connected in the threaded hole, and the anti-fog device is threadedly installed with the vehicle lamp. In addition, a sealing ring 18 is provided at the connection between the anti-fog device and the vehicle lamp. When the anti-fog device and the vehicle lamp are installed, the sealing ring 18 is in a compressed state to achieve sealing, so as to prevent moisture from the outside atmosphere 3 from directly entering the lamp cavity 2 through the gap between the anti-fog device and the vehicle lamp, thereby improving the anti-fog capability.

[0054] Embodiment 3

[0055] A vehicle is provided, the vehicle comprises the above anti-fog device or vehicle lamp, the anti-fog device is arranged on the lamp housing. The anti-fog device of the present application can improve the anti-fog capability of the vehicle lamp, and further improve the driving safety of the vehicle.

[0056] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An anti-fog device, characterized in that: The invention comprises an anti-fog body (1) arranged on a vehicle lamp, wherein one side of the anti-fog body (1) forms a lamp cavity (2), and a two-way valve (4) is arranged on the anti-fog body (1). The two-way valve (4) has a first opening pressure for exhausting gas in the lamp cavity (2) to the outside atmosphere (3) and a second opening pressure for the outside atmosphere (3) to enter the lamp cavity (2), and the first opening pressure is less than the second opening pressure.

2. The anti-fog device according to claim 1, characterized in that: The anti-fog body (1) is also provided with an elastic membrane (5) and a first through hole (6); the elastic membrane (5) covers the first through hole (6); and the elastic membrane (5) is sealed with the edge of the first through hole (6).

3. The anti-fog device according to claim 2, characterized in that: The anti-fog body (1) is provided with a shell (7), a first external cavity (8) is formed between the shell (7) and the anti-fog body (1), the elastic membrane (5) is located in the first external cavity (8), and the first external cavity (8) is connected to the external atmosphere (3).

4. The anti-fog device according to claim 3, characterized in that: The direction from the lamp cavity (2) pointing to the first external cavity (8) is a first direction, and the elastic membrane (5) is an air bag with a telescopic function along the first direction.

5. The anti-fog device according to claim 4, characterized in that: The airbag comprises a plurality of connection films (22) connected in sequence, and the plurality of connection films (22) are folded or stretched along the first direction.

6. The anti-fog device according to claim 3, characterized in that: The housing (7) is provided with a ventilation mechanism (9), and the ventilation mechanism (9) connects the first external cavity (8) with the external atmosphere (3).

7. The anti-fog device according to claim 6, characterized in that: The ventilation mechanism (9) comprises a ventilation membrane (23) and a second through hole (17) arranged on the shell, the ventilation membrane (23) covers the second through hole (17), and the ventilation membrane (23) and the edge of the second through hole (17) are sealed, and the ventilation membrane (23) is provided with a ventilation hole for connecting the first external cavity (8) with the external atmosphere (3).

8. The anti-fog device according to claim 1, characterized in that: The anti-fog body (1) is formed with a shell (7), the shell (7) is provided with a piston channel (10), a piston (11) is provided in the piston channel (10), the piston (11) divides the piston channel (10) into a first chamber (12) and a second chamber (13), the first chamber (12) is connected to the lamp cavity (2), the second chamber (13) forms a second external cavity, and the second external cavity is connected to the external atmosphere (3).

9. The anti-fog device according to claim 8, characterized in that: The piston (11) is provided in plurality, a sub-chamber (14) is formed between two adjacent pistons (11), the first chamber (12) is formed between the piston close to the lamp cavity (2) and the piston channel (10), and the second chamber (13) is formed between the piston far from the lamp cavity (2) and the piston channel (10).

10. The anti-fog device according to claim 1, characterized in that: An adsorption mechanism (15) is arranged in the lamp cavity (2), and the adsorption mechanism (15) is used to absorb moisture in the lamp cavity (2).

11. The anti-fog device according to any one of claims 1 to 10, characterized in that: The anti-fog device is a plastic part.

12. A vehicle lamp, characterized in that: The vehicle lamp comprises an anti-fog device according to any one of claims 1 to 11, wherein the vehicle lamp comprises a lamp housing (16), and the anti-fog device is arranged on the lamp housing (16).

13. The vehicle lamp according to claim 12, characterized in that: The lamp housing (16) is provided with a first mounting portion (19), and the anti-fog body (1) is provided with a second mounting portion (20), and the first mounting portion (19) and the second mounting portion (20) are connected and separated by relative rotation of the lamp housing (16) and the anti-fog body (1).

14. A vehicle, characterized in that: An anti-fog device as claimed in any one of claims 1 to 11, or a vehicle lamp as claimed in any one of claims 12 to 13.

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