Lens for vehicle lamp and active demisting structure
The combination of transparent and opaque lenses with a heating wire structure, controlled by temperature and humidity sensors, solves the problem of fogging in vehicle lights, effectively defogging and improving the appearance and safety of vehicle lights.
Patent Information
- Application Number
- CN202520186735.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-06
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-02-06
AI Technical Summary
Vehicle lights are prone to fogging in humid or temperature-sensitive conditions, which affects the driver's visibility and safety, and existing technologies are unable to effectively solve this problem.
It employs a combination of transparent and opaque lenses, with heating wires arranged on the lenses. The operation of the heating wires is controlled by temperature and humidity sensors to achieve active defogging.
It effectively reduces the temperature of the humid environment inside the headlights, accelerates fog dissipation, improves driver visibility, and enhances safety.
Smart Images
Figure CN223768742U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle lighting manufacturing technology, specifically to a lens and active defogging structure for vehicle lighting. Background Technology
[0002] With the continuous development of society, there are more and more types of vehicle lights. However, some vehicle lights have defects in use. For example, the problem of fogging in vehicle headlights has become a common problem in the industry. In humid air or in cases of large temperature differences, small water droplets easily condense on the inner surface of the light fixture, affecting the appearance and optical effect of the headlight, thereby affecting the driver's visibility and driving safety.
[0003] Furthermore, because vehicle headlights are often designed with an open structure to maintain the balance of internal and external air pressure, when the temperature changes, humid air enters the headlights and forms water mist, further exacerbating the safety hazards caused by headlight fogging. Utility Model Content
[0004] This utility model provides a lens for vehicle lighting and an active defogging structure to solve the problem that existing vehicle lights are prone to fogging due to humid air, large temperature differences between the inside and outside, or open structures.
[0005] According to an embodiment of the present invention, the lens for vehicle lighting includes:
[0006] The first lens section, which is composed of a transparent mirror, is used to allow light from the lamp to pass through, thereby achieving the function of lighting the lamp.
[0007] The second lens section is composed of an opaque mirror body and is connected to the first lens section for connecting or supporting the first lens section.
[0008] At least one heating wire is disposed on the second lens portion, and the heating wire is used to prevent fogging inside the lamp or to remove fog from inside the lamp.
[0009] In some embodiments, the lens for the vehicle lamp is a two-color injection molded part or a multi-color injection molded part.
[0010] In some embodiments, the heating wire is an in-mold injection insert embedded in the second lens portion.
[0011] In some embodiments, the heating wire is embedded on the inner surface of the second lens portion.
[0012] In some embodiments, the heating wires are multiple and arranged in the fogging risk area of the second lens portion, and / or near the fogging risk area of the first lens portion; and / or,
[0013] The heating wires are multiple and arranged in a ring around the first lens portion on the second lens portion.
[0014] In some embodiments, the heating wire is connected to a power source via a connector and a conductive wire harness.
[0015] According to another embodiment of the present invention, an active defogging structure for a vehicle lamp is provided, the active defogging structure for the vehicle lamp comprising:
[0016] The lamp includes a housing and a lens for vehicle lighting according to any one of the above embodiments connected to the housing;
[0017] Temperature and / or humidity sensors are used to detect the temperature and / or humidity values of the luminaire;
[0018] The control unit is used to control whether the heating wire in the lens of the vehicle lamp is working according to preset logic.
[0019] In some embodiments, a first switch is also included, which is disposed on a conductive wire harness connected to the heating wire, wherein the control unit controls the on / off state of the first switch according to a preset heating cycle.
[0020] In some embodiments, a first switch is also included, which is disposed on a conductive wire harness connected to the heating wire. The control unit is connected to the humidity sensor. When the humidity value detected by the humidity sensor exceeds a preset first threshold, the control unit controls the first switch to turn on, and the heating wire starts working; when the humidity value detected by the humidity sensor is lower than a preset second threshold, the control unit controls the first switch to turn off, and the heating wire stops working; and / or,
[0021] It also includes a first switch, which is disposed on the conductive wire harness connected to the heating wire. The control unit is connected to the temperature sensor. When the temperature value detected by the temperature sensor is lower than a preset third threshold or the temperature difference between the inside and outside of the lamp reaches the fogging standard, the control unit controls the first switch to be turned on, and the heating wire starts to work. When the temperature value detected by the temperature sensor is higher than a preset fourth threshold or the temperature difference between the inside and outside of the lamp is lower than the fogging standard, the control unit controls the first switch to be turned off, and the heating wire stops working.
[0022] In some embodiments, a second switch disposed in the driver's cab is also included, which controls whether the heating wire is activated based on user operation; and / or,
[0023] An exhaust fan is also provided inside or outside the lamp, and the exhaust fan works in conjunction with the heating wire.
[0024] Compared with the prior art, the embodiments of this utility model have the following advantages:
[0025] The vehicle lamp lens provided in this embodiment of the utility model, by arranging the heating wire in the opaque area of the lamp lens, does not affect the optics or appearance of the lamp, and also meets the requirements of relevant specifications; and by setting the heating wire to actively heat the lamp lens, the dew point temperature inside the lamp is reduced, and the air flow inside the lamp is accelerated, thereby achieving effective defogging. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the specific embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model.
[0027] Figure 1 This is a three-dimensional structural schematic diagram of a lens for vehicle lighting provided in some embodiments of this utility model;
[0028] Figure 2 This is an exploded view of a lens for a vehicle lamp provided in some embodiments of this utility model;
[0029] Figure 3 This is a schematic diagram of the fog dissipation direction of a lens for vehicle lighting provided in some embodiments of this utility model;
[0030] Figure 4 This is a front view of a lens for vehicle lighting provided in some embodiments of this utility model;
[0031] Figure 5 yes Figure 4 Schematic diagram of the structure in the AA direction;
[0032] Figure 6 yes Figure 5 A magnified structural diagram of region B in the middle section;
[0033] Figure 7 This is a schematic diagram of the control structure of the active defogging structure for vehicle lights provided in some embodiments of this utility model.
[0034] Attached image annotations:
[0035] 1. First lens section; 2. Second lens section; 21. Heating wire hole; 3. Heating wire; 4. Housing; 5. Insertion position. Detailed Implementation
[0036] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0037] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0038] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0039] In the description of this utility model, the reference to terms such as "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model.
[0040] See Figure 1-6 As shown, an embodiment of this utility model discloses a lens for vehicle lighting, comprising:
[0041] The first lens section 1 is composed of a transparent mirror body and is used to allow light from the lamp to pass through, thereby playing the role of lighting the lamp; wherein, the first lens section can be formed by splicing multiple mirror bodies together, or it can be formed by a single transparent mirror body.
[0042] The second lens part 2 is composed of an opaque mirror body. The second lens part 2 can also be a single unit or formed from an opaque mirror body. The second lens part 2 is connected to the first lens part 1. The connection method includes splicing methods such as snap-fit and adhesive, or it can be integrally formed.
[0043] The second lens portion 2 is used to connect to or support the first lens portion 1; optionally, the second lens portion 2 is generally in the form of a ring structure, and the first lens portion 1 is embedded in the hollow position of the second lens portion 2.
[0044] See Figure 1 and Figure 2 At least one heating wire 3 is provided on the lens of the vehicle lamp. The heating wire 3 may be a resistance wire, and the heating wire 3 is provided on the second lens part 2.
[0045] Specifically, the heating wire 1 is disposed on the surface of the second lens portion 2, and the heating wire 3 can be observed from the surface of the second lens portion 2. Alternatively, the heating wire 3 can be disposed inside the second lens portion 2 without being exposed on its surface. In addition, the heating wire 3 is used to prevent fogging inside the lamp or to remove fog from the lamp by heating the second lens portion 2 and the surrounding air.
[0046] According to this embodiment, by placing the heating wire 3 on the opaque second lens part 2, the heating wire 3 is avoided from affecting the optics and appearance of the lamp, while also meeting the relevant specifications for lenses.
[0047] In some embodiments, the lens for the vehicle lamp is a two-color injection molded part or a multi-color injection molded part.
[0048] It should be noted that two-color injection molding refers to the molding process of injecting two different materials into the same mold, thereby creating a part formed from two materials. Sometimes the two materials are different colors, and sometimes they have different hardness, thus improving the product's aesthetics and assembly performance. For example, in the lens mentioned above, the first lens part uses a transparent first material while the second lens part uses an opaque second material; they are injection molded into a single unit using a two-color injection molding process.
[0049] Of course, the above-mentioned lens can also be formed by multi-color injection molding. When using multi-color injection molding, the second lens part can be injection molded from multiple opaque materials, while the first lens part is injection molded from a transparent material.
[0050] Metal insert injection molding is a method in which a metal insert is pre-fixed in an appropriate position in a mold, and then plastic is injected to form the insert. After the mold is opened, the insert is tightly encased and embedded in the product by the cooled and solidified plastic, resulting in a product with inserts such as threaded rings and electrodes.
[0051] Therefore, in some alternative embodiments, especially when the heating wire 3 is a metal wire, the heating wire 3 can be an in-mold injection molding insert, which is embedded in the second lens part by injection molding, thereby injection molding the heating wire and the lens together by in-mold insert injection molding.
[0052] In some alternative embodiments, the heating wire 3 is embedded on the inner surface of the second lens portion 2, in which case the heating wire 3 can be seen when viewed from the inside of the lamp.
[0053] In addition, by using condensation simulation, risk areas where the luminaire is prone to fogging can be identified during the design phase. Heating wires can be placed in or near these risk areas to actively heat the lens and change its surface temperature, especially making the inner surface temperature of the lens higher than the dew point temperature for fogging, thus disrupting the conditions for fogging. On the other hand, if fogging has already occurred, heating can also accelerate the dissipation of the fog, thereby achieving the purpose of active defogging.
[0054] Specifically, the heating wire 3 is one or more wires arranged in the fogging risk area on the second lens section 2, or the heating wire 3 may be close to the fogging risk area of the first lens section 1.
[0055] See Figure 3-6 As shown, the heating wires 3 are multiple, arranged in a ring around the first lens portion 1 on the second lens portion, wherein... Figure 3 The arrow indicates the direction in which the fog on the first lens section dissipates after heating, and can also point to the location of the heating wire on the second lens section.
[0056] It should be noted that the arrangement of heating wires 3 can be determined based on the size of the fogging risk zone determined by condensation simulation. The closer to the fogging risk zone, the better the effect, but the actual space and the reliability of the mold structure used to manufacture them must be considered. Heating wires can be arranged in a single row or multiple rows, and their shape must follow the curvature of the lens surface.
[0057] The effectiveness of demisting in the heating zone can be determined by combining thermal simulation with condensation simulation, and the power of the heating wire can be defined.
[0058] Combination Figure 4 , Figure 5 and Figure 6 As shown, a heating wire 3 is provided on the second lens part 2 through a heating wire hole 21. Furthermore, a plug-in position 5 is provided on the assembled lamp. The plug-in position 5 is connected to the heating wire 3. Then, a plug-in component is provided on the plug-in position 5. The plug-in component is connected to a conductive wire harness. Then, the conductive wire harness is connected to a power supply. Thus, the heating wire 3 is connected to the conductive wire harness inside the lamp through the plug-in component.
[0059] It should be noted that the power source can be a power source on the vehicle or an independent power source installed inside the lamp.
[0060] Combination Figure 1-7As shown, according to another embodiment of the present invention, an active defogging structure for a vehicle lamp is provided, the active defogging structure for the vehicle lamp comprising:
[0061] The lamp includes a housing 4 and a lens for vehicle lighting according to any one of the above embodiments connected to the housing;
[0062] Temperature and humidity sensors are used to detect the temperature and humidity values of the lamps, respectively. It should be noted that there can be two or more temperature and humidity sensors. For example, by setting two temperature sensors inside and outside the lamp, the temperature difference between the inside and outside of the lamp can be obtained, thereby determining the conditions for fogging.
[0063] The control unit is used to control whether the heating wire 3 in the lens of the vehicle lamp is working according to preset logic. The control unit can be a controller specifically designed for the lamp, or it can be the control unit of the overall vehicle controller.
[0064] According to this embodiment, by setting heating wire 3 to actively heat the headlight lens, the dew point temperature inside the headlight is reduced, and the air flow inside the headlight is accelerated to achieve effective defogging.
[0065] In some embodiments, combined with Figure 7 As shown, the active defrosting structure of the vehicle lights also includes a first switch, which is disposed on a conductive wire harness connected to the heating wire. The control unit controls the on / off state of the first switch according to a preset heating cycle. For example, the heating start logic can be customized in the control unit, such as controlling the heating wire to work for 10 minutes after each engine start, then stopping for 2 hours, and repeating this cycle.
[0066] In other embodiments, the active defogging structure of the vehicle lights also includes a first switch, which is disposed on a conductive wire harness connected to the heating wire. The control unit is connected to the humidity sensor. When the humidity value detected by the humidity sensor exceeds a preset first threshold, the control unit controls the first switch to turn on, and the heating wire starts to work. When the humidity value detected by the humidity sensor is lower than a preset second threshold, the control unit controls the first switch to turn off, and the heating wire stops working.
[0067] Furthermore, the control unit is connected to the temperature sensor. When the temperature value detected by the temperature sensor is lower than a preset third threshold or the temperature difference between the inside and outside of the lamp reaches the fogging standard, the control unit controls the first switch to turn on, and the heating wire starts to work. When the temperature value detected by the temperature sensor is higher than a preset fourth threshold or the temperature difference between the inside and outside of the lamp is lower than the fogging standard, the control unit controls the first switch to turn off, and the heating wire stops working.
[0068] It should be noted that the first switch mentioned above can be an electromagnetic switch, which facilitates automatic control.
[0069] In some other embodiments, the active defogging structure of the vehicle lights also includes a second switch arranged in the driver's cab. The second switch may be a button, lever, or touch button. The second switch controls whether the heating wire 3 is working according to the user's operation of turning it on or off.
[0070] In addition, an exhaust fan can be installed inside or outside the lamp, and the exhaust fan can work in conjunction with the heating wire. For example, when fogging is detected or the conditions for fogging are met, the exhaust fan and the heating wire can be turned on at the same time to increase air circulation and allow the fog to be quickly discharged or dissipated.
[0071] In summary, the vehicle lighting lens and active defogging structure disclosed in this utility model embodiment can achieve the following beneficial effects:
[0072] The vehicle lamp lens provided in this embodiment of the utility model, by arranging the heating wire in the opaque area of the lamp lens, does not affect the optics or appearance of the lamp, improves the appearance of the lamp, and also meets the requirements of relevant specifications; and by setting the heating wire to actively heat the lamp lens, the dew point temperature inside the lamp is reduced, and the air flow inside the lamp can be accelerated to achieve effective defogging.
[0073] It should be noted that although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications 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 of the present invention.
Claims
1. A lens for a vehicle lamp, characterized by, The lens for vehicle lamp comprises: a first lens part composed of transparent mirror body, for passing light of lamp, thereby playing a role of illuminating lamp; a second lens part composed of non-transparent mirror body, connected with the first lens part, for connecting or supporting the first lens part; at least one heating wire arranged on the second lens part, for preventing fogging in lamp or removing fog in lamp.
2. The lens for vehicle lamps according to claim 1, characterized by The lens for vehicle lamp is a double-color injection molding part or a multi-color injection molding part.
3. The lens for vehicle lamps according to claim 2, characterized by The heating wire is an in-mold injection molding insert embedded on the second lens part.
4. The lens for vehicle lamps according to any one of claims 1 to 3, characterized by The heating wire is embedded on the inner side surface of the second lens part.
5. The lens for vehicle lamps according to any one of claims 1 to 3, characterized by The heating wire is multiple, arranged in a fogging risk area on the second lens part, and / or close to the fogging risk area of the first lens part; and / or, The heating wire is multiple, arranged in a ring around the first lens part on the second lens part.
6. The lens for vehicle lamps according to any one of claims 1 to 3, characterized by The heating wire is connected with power supply through a plug-in part and a conductive wire harness.
7. An active defogging structure of a vehicle lamp, characterized by, The active defogging structure of the vehicle lamp comprises: a lamp comprising a shell and a lens for vehicle lamp according to any one of claims 1-6 connected with the shell; a temperature sensor and / or a humidity sensor for detecting temperature value and / or humidity value of the lamp; a control unit for controlling whether the heating wire in the lens for vehicle lamp works according to preset logic.
8. The active defogging structure of a vehicle lamp according to claim 7, characterized by, Further comprising a first switch arranged on the conductive wire harness connected with the heating wire, wherein the control unit controls on-off of the first switch according to preset heating period.
9. The active defogging structure of a vehicle lamp according to claim 7, characterized by, Further comprising a first switch arranged on the conductive wire harness connected with the heating wire, and the control unit is connected with the humidity sensor, when detecting that the humidity value of the humidity sensor exceeds a preset first threshold value, the control unit controls the first switch to be turned on, and the heating wire starts to work; when detecting that the humidity value of the humidity sensor is lower than a preset second threshold value, the control unit controls the first switch to be turned off, and the heating wire stops working; and / or, Further comprising a first switch arranged on the conductive wire harness connected with the heating wire, and the control unit is connected with the temperature sensor, when detecting that the temperature value of the temperature sensor is lower than a preset third threshold value or a temperature difference between inside and outside of the lamp reaches a fogging standard, the control unit controls the first switch to be turned on, and the heating wire starts to work; when detecting that the temperature value of the temperature sensor is higher than a preset fourth threshold value or the temperature difference between inside and outside of the lamp is lower than the fogging standard, the control unit controls the first switch to be turned off, and the heating wire stops working.
10. The active defogging structure of a vehicle lamp according to any one of claims 7-9, characterized in that, Further comprising a second switch arranged in the driver's cabin, which controls whether the heating wire works according to operation of a user; and / or, An exhaust fan is further arranged in or outside the lamp, which works in cooperation with the heating wire.