Car lamp lampshade with transparent heating demisting film

Abstract

The utility model relates to the technical field of automobile lamp manufacturing, in particular to an automobile lamp shade with a transparent heating demisting film, which comprises the transparent heating demisting film, a lamp shade and a heating wire, the transparent heating demisting film comprises a film base body, the film base body is adhered on the inner shell surface of the lamp shade, and the heating wire is arranged on the inner shell surface of the lamp shade. The lampshade is directly pressed on the film base body of the transparent heating demisting film before injection molding in a mold is completed and the lampshade is not separated from the mold, and after heating, the part, attached to the film base body of the transparent heating demisting film, of the lampshade is melted and then fused together again, so that the film base body is bonded to the inner shell face of the lampshade, and the lampshade is formed. The heating wire is clamped between the inner shell face of the lampshade and the film base body. The problem that an anti-fog technology which is low in cost, low in energy consumption and long in service life is lacked in an existing car lamp lampshade technology is solved.

Description

Technical Field

[0001] This utility model relates to the field of automotive lamp manufacturing technology, specifically to an automotive lamp cover with a transparent heating and defogging film. Background Technology

[0002] Headlight fogging not only affects a vehicle's aesthetics and lighting performance, leading to user complaints, but also directly threatens driving safety and increases long-term maintenance costs. While headlight fogging is a normal physical phenomenon, its hazards encompass three core issues: safety, economy, and performance, directly impacting user satisfaction. Fog-proofing capability will also become a key indicator in vehicle safety ratings. Currently, domestic and international automakers and headlight manufacturers are continuously exploring feasible and rapid anti-fog and defogging technologies to solve the fogging problem.

[0003] Many factors contribute to fogging, such as the moisture content of the plastic components inside the lamp, the lamp's design and the arrangement of its internal components, the lamp's placement environment and production status, the location and quantity of venting components, and the vehicle's driving environment. Fogging mainly occurs in rainy weather, after prolonged exposure to sunlight, after washing the car with the lights on, and in cold weather. The main causes of fogging in lamps are temperature and humidity changes. When the temperature inside the lamp is lower than the dew point temperature of the air, water vapor in the air will condense into fog on the low-temperature inner surface of the lamp cover. For example, when the lamp is exposed to sunlight, in a hot engine compartment, or when the lights are on, the internal plastic components heat up, releasing a large amount of water. This significantly increases the moisture content of the air inside the lamp, raises the dew point, and causes uneven temperature distribution. When the hot, humid air flows into an area below the dew point temperature, the water vapor condenses into water droplets. In addition, insufficient lamp sealing or aging after long-term use can also lead to external moisture seeping in.

[0004] While fogging is a normal natural phenomenon, fogged headlights can affect their use and even driver safety. Current anti-fogging methods have limitations. Anti-fogging coatings require higher standards of production environment and manufacturing processes, and in high humidity environments, they fail, resulting in runs and marks on the lens. While ventilated components offer some air permeability and diffusion, slowly expelling humid air from the headlight, moisture can still enter the lamp cavity in rainy, humid, and hot environments, making complete moisture isolation impossible. Their effectiveness is also limited under extreme temperature differences, and once fogging becomes severe, it is difficult to dissipate. While placing desiccants inside the headlights is a simple and direct way to reduce humidity, they only last about three months, resulting in a short lifespan. Although replaceable desiccants have been used in headlights in recent years, the cumbersome installation and removal process makes timely replacement difficult, and the limited space inside the headlight restricts the amount of desiccant that can be placed, making the desiccant effective but not long-lasting. It is well known that fogging is a normal physical phenomenon, but how to quickly defog without affecting driving is a pressing issue that needs to be addressed. Summary of the Invention

[0005] To address the lack of a low-cost, low-energy-consumption, and long-life anti-fog technology in existing automotive lamp cover technology, this application proposes an automotive lamp cover with a transparent heated defogging film, thus solving the aforementioned technical problem.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] This utility model provides a vehicle headlight cover with a transparent heated defogging film, comprising: a transparent heated defogging film, the transparent heated defogging film including a film substrate, the film substrate being adhered to the inner shell surface of the headlight cover; a headlight cover, the headlight cover being directly pressed onto the film substrate of the transparent heated defogging film before being ejected from the mold after injection molding, and after being heated, the portion of the headlight cover and the film substrate of the transparent heated defogging film that are in contact melts and then re-fused together, so that the film substrate is adhered to the inner shell surface of the headlight cover; and a heating wire, the heating wire being clamped between the inner shell surface of the headlight cover and the film substrate.

[0008] Furthermore, the substrate of the transparent heating defogging film is the same as the substrate of the lampshade.

[0009] Furthermore, the substrate of the transparent heating defogging film and the substrate of the lampshade are both PC.

[0010] Furthermore, the transparent heated defogging film also includes positioning protrusions protruding from the film substrate to position the film substrate within a fixture during the manufacturing process.

[0011] Furthermore, the two ends of the heating wire within the membrane substrate are positioned at the ends of the positioning protrusion away from the membrane substrate to form a positive and a negative electrode for electrical connection.

[0012] Furthermore, the wiring of the heating wire within the membrane substrate covers the bonding surface of the membrane substrate, and the wiring of the heating wire within the membrane substrate has no secondary contact.

[0013] Furthermore, a groove with the same routing path as the heating wire is formed on one side of the inner shell of the lampshade to accommodate the heating wire.

[0014] Furthermore, the heating wire is embedded in the membrane matrix by ultrasonic waves.

[0015] Based on the above technical solution, the technical effects that this utility model can achieve are as follows:

[0016] This invention relates to a car headlight cover with a transparent heating and defogging film. The transparent heating and defogging film is bonded to the inner shell surface of the headlight cover using an in-mold injection molding process. A heating wire is embedded within the film substrate of the transparent heating and defogging film. This heating wire rapidly generates heat when energized, thus removing moisture from the inner surface of the headlight cover. The film substrate with the metal wire is bonded to the headlight cover using an in-mold injection molding process. Specifically, the headlight cover is directly pressed onto the film substrate before being ejected from the mold. Heated by an external heating device, the areas where the headlight cover and film substrate are in contact melt and then re-fuse together, adhering the film substrate to the inner shell surface of the headlight cover. The heating wire is held between the inner shell surface of the headlight cover and the film substrate, preventing contact with air and providing high wear and corrosion resistance. This results in extremely high stability and durability for the entire headlight cover product, meeting the requirements of the internal environment of car lights. Furthermore, the thickness and placement of the heating wire can be adjusted as needed, allowing for diverse headlight cover products. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the vehicle headlight cover with a transparent heating and defogging film according to this utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the vehicle headlight cover with a transparent heating and defogging film according to the present invention;

[0019] Figure 3 This is a schematic diagram of the transparent heating and defogging film of this utility model;

[0020] Figure 4 This is a partial cross-sectional schematic diagram of a transparent heated defogging film in one embodiment of the present invention.

[0021] In this utility model: 1-transparent heating defogging film, 11-film substrate, 12-positioning protrusion; 2-lamp cover; 3-heating wire, 31-positive electrode, 32-negative electrode. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] like Figure 1-4As shown, the vehicle headlight cover with a transparent heating defogging film of this utility model includes a transparent heating defogging film 1, a headlight cover 2, and a heating wire 3. The transparent heating defogging film 1 includes a film substrate 11, which is bonded to the inner shell surface of the headlight cover 2. Before the headlight cover 2 is removed from the mold after injection molding, it is directly pressed onto the film substrate 11 of the transparent heating defogging film 1. After being heated, the part of the headlight cover 2 and the film substrate 11 of the transparent heating defogging film 1 that are attached melts and then re-fused together, so that the film substrate 11 is bonded to the inner shell surface of the headlight cover 2. The heating wire 3 is clamped between the inner shell surface of the headlight cover 2 and the film substrate 11.

[0024] In a preferred embodiment of this utility model, the substrate of the film substrate 11 of the transparent heating defogging film 1 is the same as the substrate of the lampshade 2, and both are PC. Of course, the substrates of both can also be PET.

[0025] In a preferred embodiment of the present invention, the transparent heating defogging film 1 further includes a positioning protrusion 12 protruding from the film substrate 11 to position the film substrate 11 within a fixture during the manufacturing process.

[0026] Furthermore, the two ends of the heating wire 3 inside the membrane substrate 11 are disposed at the ends of the positioning protrusion 12 away from the membrane substrate 11 to form a positive electrode 31 and a negative electrode 32 for electrical connection.

[0027] In a preferred embodiment of the present invention, the heating wire 3 is routed throughout the bonding surface of the membrane substrate 11, and the heating wire 3 is routed within the membrane substrate 11 without secondary contact.

[0028] like Figure 4 As shown, in a specific embodiment of this utility model, the film substrate 11 is bonded to one side of the inner shell surface of the lampshade 2 and a groove with the same routing path as the heating wire 3 is provided to accommodate the heating wire 3.

[0029] In one specific embodiment of this utility model, the heating wire 3 is a copper wire with a diameter of 2μm, which is embedded in the membrane substrate 11 by ultrasonic waves.

[0030] The vehicle lamp cover with transparent heating and defogging film of this utility model adopts the in-film injection molding process to combine the electrically heated film substrate 11 with the vehicle lamp cover 2. This process is mature, reliable, and highly stable. It uses the same mold as the lamp cover 2, which is low in cost and highly repeatable.

[0031] The vehicle lamp cover with transparent heating and defogging film of this utility model has the film substrate 11 directly injection molded together with the lamp cover 2. The product has good stability and durability, wear resistance and scratch resistance, good waterproof and moisture-proof performance, and the heating wire 3 circuit layout is easy to change without the need for mold repair or jig modification.

[0032] This utility model of a car lamp cover with a transparent heating and defogging film utilizes the working principle of heating wire 3, such as copper wire, through electric current. With a small input current, the two sides of the lamp cover can be heated quickly to prevent fogging or quickly remove surface moisture. It is low-energy and has a very short heating time. By adding temperature and humidity control measures, an automatic defogging control system can be formed.

[0033] This utility model relates to a car lamp cover with a transparent heating and defogging film. The lamp cover 2 is heated by a heating wire 3, such as a copper wire, which is energized. It works immediately upon power-on without the need for any other drive system. It is fast and efficient, and the defogging process is simple. It can be turned on immediately upon use. It not only prevents fogging on both sides of the lamp cover, but also quickly eliminates any fogging that may occur.

[0034] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A vehicle lamp lens with a transparent, heated, defogging film, characterized in that, The application relates to a transparent heating defogging film (1) comprising a film base (11) adhered to the inner surface of a lampshade (2); the lampshade (2) is directly pressed on the film base (11) of the transparent heating defogging film (1) before being taken out of a mold after being injection molded in the mold; after being heated, the part of the lampshade (2) and the film base (11) of the transparent heating defogging film (1) that are adhered together is melted and then fused together again, so that the film base (11) is adhered to the inner surface of the lampshade (2); a heating wire (3) is clamped between the inner surface of the lampshade (2) and the film base (11). The base material of the film base (11) of the transparent heating defogging film (1) is the same as that of the lampshade (2). The base material of the film base (11) of the transparent heating defogging film (1) is PC. The transparent heating defogging film (1) further comprises a positioning protrusion (12) protruding from the film base (11) to position the film base (11) in a jig during production.

2. The vehicle light lens with transparent defogging film according to claim 1, characterized in that, The two ends of the heating wire (3) in the film base (11) are arranged at the end of the positioning protrusion (12) away from the film base (11) to form a positive electrode (31) and a negative electrode (32) for electrical connection.

3. The vehicle light lens with transparent defogging film according to claim 2, characterized in that, The wire arrangement of the heating wire (3) in the film base (11) covers the adhesive surface of the film base (11), and the wire arrangement of the heating wire (3) in the film base (11) has no secondary contact.

4. The vehicle lamp lens cover with a transparent heating defogging film according to claim 1, characterized in that, The film base (11) adhered to the inner surface of the lampshade (2) is provided with a groove on one side, which is the same as the wire arrangement path of the heating wire (3) to accommodate the heating wire (3).

5. The vehicle lamp lens cover with transparent defogging film according to claim 4, characterized in that, The heating wire (3) is embedded in the film base (11) by ultrasonic waves.

6. The vehicle lamp lens cover with a transparent, heated, defogging film of claim 1, wherein, ​ 7. The vehicle lamp lens cover with a transparent, heated, defogging film of claim 1, wherein, ​ 8. The vehicle lamp lens cover with a transparent, heated, defogging film of claim 1, wherein, ​

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