A two-color lamp bulb structure and vehicle

Abstract

The utility model provides a kind of double color lamp glass structure and vehicle, belong to automobile lamp technical field.The double color lamp glass structure, including transparent lamp glass and black lamp glass;The inner surface of the transparent lamp glass is equipped with the bulge portion extending inwards;The black lamp glass is attached to the inner surface of the transparent lamp glass, and the end of the black lamp glass is connected with the side wall of the bulge portion one interface.Through setting the bulge portion extending inwards in the inner surface of transparent lamp glass, and make the end of black lamp glass and the side wall of the bulge portion one interface, reduce the risk of filling difficulty, lack of glue and poor welding in injection molding process;At the same time, the structure increases the contact area of double color lamp glass lap joint area, improves the welding effect and adhesive strength, improves the ability of overall resistance external stress.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, and in particular to a dual-color lamp glass structure and a vehicle. Background Technology

[0002] In the automotive lighting manufacturing industry, bi-color lamp glass is widely used in headlights, taillights, and daytime running lights to achieve an integrated design of the light-transmitting and light-shielding areas. Traditional bi-color lamp glass typically consists of a transparent lamp glass and a black lamp glass, with the black lamp glass applied to the inner surface of the transparent lamp glass via spraying or lamination. To prevent fogging inside the lamp and its impact on lighting performance, an anti-fog paint is sprayed onto the inner surface of the lamp glass and cured at 110°C for 20 to 30 minutes. However, during this high-temperature curing process, the anti-fog paint undergoes a rapid and intense curing reaction, which not only corrodes the lamp glass material but also generates significant internal stress in the overlapping areas due to differences in the thermal expansion coefficients of the materials.

[0003] Existing dual-color lamp glass overlap structures often employ planar butt joints or acute-angle overlaps, particularly at the junction of the black and transparent lamp glass, where sharp angles less than 45° are frequently formed. These sharp-angle structures, on the one hand, easily lead to poor plastic melt filling during subsequent processes such as injection molding of the reflector, resulting in insufficient glue or air bubbles; on the other hand, during the high-temperature curing stage, stress easily concentrates at the sharp corners, creating strong tensile forces on the overlap area, ultimately causing the glass to crack. This cracking not only severely affects the product's appearance quality but also damages the lamp glass's sealing performance, leading to moisture intrusion, decreased optical performance, and even lamp failure. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to provide a dual-color lamp glass structure that can effectively prevent cracking of the overlapping area during high-temperature curing.

[0005] The first aspect of this utility model provides a dual-color lamp glass structure, including a transparent lamp glass and a black lamp glass; The inner surface of the transparent lamp glass is provided with an inwardly extending protrusion; The black lamp glass is attached to the inner surface of the transparent lamp glass, and the end of the black lamp glass is connected to one side wall of the protrusion.

[0006] Furthermore, the width of the protrusion is greater than 1 mm.

[0007] Furthermore, the height of the protrusion is greater than 0.3 mm.

[0008] Furthermore, the root of the protrusion near the side wall of the black lamp glass is recessed inward to form a recess for accommodating the end of the black lamp glass; the end of the black lamp glass is embedded in the recess.

[0009] Furthermore, the height from the bottom of the recess to the top of the protrusion is greater than 0.5 mm.

[0010] Furthermore, the angle between the sidewall of the protrusion near the black lamp glass and the surface of the transparent lamp glass is greater than 45°.

[0011] Furthermore, the angle between the sidewall of the protrusion near the black lamp glass and the surface of the transparent lamp glass is 90°.

[0012] Furthermore, the area on the inner surface of the transparent lamp glass not covered by the black lamp glass and the inner surface of the black lamp glass are provided with an anti-fog paint layer.

[0013] Furthermore, the other sidewall of the protrusion is a slope.

[0014] A second aspect of this utility model provides a vehicle including the bi-color headlight glass structure described above.

[0015] This utility model has the following advantages or beneficial effects: By setting an inwardly extending protrusion on the inner surface of the transparent lamp glass and connecting the end of the black lamp glass to one sidewall of the protrusion, the risk of filling difficulties, insufficient glue, and poor welding during injection molding is reduced. At the same time, this structure increases the contact area of ​​the overlapping area of ​​the two-color lamp glass, improves the welding effect and bonding strength, and enhances the overall resistance to external stress. Especially in the subsequent process of anti-fog paint spraying and high-temperature curing at 110℃ for 20-30 minutes, it can effectively disperse the thermal stress generated by the curing reaction, avoid the stress concentration on the tensile effect of the overlapping area, fundamentally prevent cracking, and thus ensure product quality. Attached Figure Description

[0016] The above and other features and advantages of this invention will become more apparent from a detailed description of exemplary embodiments with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of a dual-color lamp glass structure according to an exemplary embodiment; Figure 2 yes Figure 1 Enlarged view of part A in the image.

[0018] The reference numerals in the attached figures are explained as follows: 1. Transparent light glass, 2. Black light glass, 3. Anti-fog paint layer, 4. Raised part. Detailed Implementation

[0019] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0020] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0021] Figure 1 This is a schematic diagram of a dual-color lamp glass structure according to an exemplary embodiment; Figure 2 yes Figure 1 Enlarged view of part A in the diagram. The above schematic diagram is only to illustrate the structural relationships related to the inventive point and is not intended as an actual scale of the product.

[0022] Example 1 This utility model relates to a dual-color lamp glass structure for automotive lighting, and more particularly to a dual-color lamp glass structure that effectively avoids problems such as poor injection molding filling and cracking caused by stress concentration during high-temperature curing by optimizing the geometry of the overlapping area, and further provides an automotive vehicle solution incorporating this structure.

[0023] In existing technologies, automotive headlights and taillights often employ a dual-color lens design, meaning that a single lens panel simultaneously features a transparent area and a black, light-shielding area to achieve a unified lighting function and aesthetic appeal. Traditionally, this involves partially spraying black paint onto the inner surface of the transparent lens to create a black lens area, or attaching a separate black glass sheet to the inside of the transparent lens. However, in actual manufacturing processes, especially during subsequent injection molding of reflectors or mounting brackets, if the overlap between the black and transparent lenses forms a sharp angle less than 45 degrees, it can easily cause poor flow of the molten plastic at that point, resulting in defects such as insufficient filling, bubbles, or shrinkage marks. More seriously, during the subsequent application of anti-fog paint and high-temperature curing at 110 degrees Celsius for 20 to 30 minutes, the difference in thermal expansion coefficients between the black coating and the transparent glass material can generate significant tensile stress at the sharp corner, leading to micro-cracks or even macro-cracks in the glass, severely impacting product yield and lifespan.

[0024] like Figure 1 and Figure 2As shown, to solve the above-mentioned technical problems, this utility model proposes an improved dual-color lamp glass structure. This structure includes a single-piece molded transparent lamp glass 1 and a black lamp glass 2. The transparent lamp glass 1 is typically made of transparent PC, possessing good optical performance and mechanical strength. The black lamp glass 2 is also made of PC, and its main function is to shield the internal structure of the lamp, enhancing its appearance.

[0025] The key improvement lies in the inward-extending protrusion 4 on the inner surface of the transparent lamp glass 1 (i.e., the side facing the interior of the lamp). This protrusion 4 is not a simple bulge, but a precisely designed three-dimensional structure that provides a stable support and overlapping platform for the end of the black lamp glass 2. Specifically, the black lamp glass 2 is attached to the inner surface of the transparent lamp glass 1, with one end precisely aligned with one sidewall of the protrusion 4. This overlapping method completely changes the traditional flat, sharp-corner connection structure, fundamentally eliminating dangerous angles of less than 45 degrees.

[0026] To further optimize structural performance, the width L of the protrusion 4 is greater than 1 mm, and the height D of the protrusion 4 is greater than 0.3 mm. This height can effectively raise the overlapping interface to prevent the plastic melt from directly impacting the glass edge, and will not affect the internal space layout or optical design of the lamp due to excessive height.

[0027] Furthermore, at the root of the sidewall of the protrusion 4 near the black lamp glass 2, an inwardly recessed portion is designed. This recess is specifically designed to accommodate the end of the black lamp glass 2, allowing it to be embedded within it, forming an "embedded" overlapping structure. This design not only enhances the bonding stability of the two but, more importantly, provides stress buffer space at the microscopic level. When the material undergoes minor deformation during high-temperature curing, the recess can absorb some of the strain energy. Experimental verification shows that the vertical height H from the bottom of the recess to the top of the protrusion 4 is preferably greater than 0.5 mm. This depth is sufficient to accommodate the end of the black lamp glass 2 of conventional thickness, while allowing for manufacturing tolerances.

[0028] Regarding angle control, this invention specifically emphasizes that the angle α between the sidewall of the protrusion 4 near the black lamp glass 2 and the inner surface of the transparent lamp glass 1 should be greater than 45 degrees. This angle range is a key threshold derived from numerous process experiments: when the angle α is less than 45 degrees, the risk of cracking increases significantly regardless of whether a recess is provided; while when the angle α reaches or exceeds 45 degrees, the stress distribution tends to be uniform, and cracking is greatly reduced. Based on this, in the optimal embodiment, the angle α is set to 90 degrees, that is, the sidewall is perpendicular to the inner surface of the transparent lamp glass 1. This right-angle structure not only facilitates mold processing and demolding but also maximizes space utilization, allowing the end of the black lamp glass 2 to form surface contact with the sidewall rather than line contact, further improving structural reliability.

[0029] Furthermore, to meet the requirements of automotive lighting for internal anti-fog functionality, this invention also applies an anti-fog paint layer 3 to the transparent areas of the inner surface of the transparent lamp glass 1 that are not covered by the black lamp glass 2. This anti-fog paint layer 3 is typically composed of hydrophilic resin and nano-silica, which can prevent water vapor from condensing into fog droplets under temperature differences, ensuring clear illumination. Simultaneously, an anti-fog paint layer 3 is also applied to the inner surface of the black lamp glass 2. Although the black areas do not participate in light transmission, applying the anti-fog paint helps maintain the consistency of the chemical environment on the entire lamp cavity surface, avoiding electrochemical corrosion or differences in paint film adhesion caused by uncoated areas. It should be noted that all anti-fog paint layers 3 must undergo a standard high-temperature curing process at 110 degrees Celsius for 20 to 30 minutes, and the structural design of this invention is precisely to maintain the integrity of the glass under these stringent conditions.

[0030] It is worth mentioning that the other sidewall of the protrusion 4 (i.e., the side away from the black lamp glass 2) is designed as a slope. This slope can be a straight ramp or a rounded transition, and its main function is to guide the plastic melt to flow smoothly around the protrusion 4 during injection molding, avoiding eddies, stagnation, or cold runner marks. The presence of the slope also helps to reduce mold release resistance and extend mold life.

[0031] In summary, this invention successfully solves the technical problem of easy cracking of traditional dual-color lamp glass during injection molding and high-temperature curing by setting a protrusion 4 with a specific width, height, angle, and recess structure on the inner surface of the transparent lamp glass 1, and combining it with the embedded overlapping method of the black lamp glass 2. All structural parameters, including the width of the protrusion 4 > 1 mm, the height > 0.3 mm, the depth of the recess > 0.5 mm, and the overlapping angle ≥ 45° (preferably 90°), have been systematically verified. Their synergistic effect ensures high reliability and high yield of the product.

[0032] The dual-color lamp glass structure of this embodiment is mainly composed of transparent polycarbonate (PC) material, and an anti-fog paint layer 3 is coated on a specific area of ​​the inner surface. After optimization of the curing process, a crack-free and highly sealed finished product is obtained.

[0033] This embodiment provides a preparation method to prevent cracking of bi-color lamp glass during high-temperature curing after spraying anti-fog paint, applicable to bi-color lamp glass structures for automotive lamps made of transparent polycarbonate (PC) material.

[0034] First, a bicolor lamp glass substrate with a specific overlapping structure is prepared. This bicolor lamp glass comprises two parts: a transparent lamp glass 1 and a black lamp glass 2. The transparent lamp glass 1 is made of transparent PC material, with an inwardly extending protrusion 4 integrally formed or subsequently processed on its inner surface. The black lamp glass 2 is disposed on the inner surface of the transparent lamp glass 1, its end abutting against one sidewall of the protrusion 4. Specifically, the angle between the sidewall of the protrusion 4 near the black lamp glass 2 and the inner surface of the transparent lamp glass 1 is greater than 45°, preferably 90°, to avoid forming a sharp angle structure less than 45°. Furthermore, an inwardly recessed portion is provided at the root of this sidewall, and the end of the black lamp glass 2 is embedded in this recessed portion, thereby forming a stable overlapping relationship. This structural design aims to solve the problems of poor filling during injection molding and stress concentration-induced cracking during subsequent spraying and curing processes caused by sharp angles in the overlapping area of ​​traditional bicolor lamp glass.

[0035] After the dual-color lamp glass structure is assembled, its inner surface is subjected to electrostatic dust removal treatment to remove dust and impurities and ensure good adhesion of subsequent coatings.

[0036] Subsequently, a UV anti-fog paint layer 3 is sprayed onto the inner surface of the lamp glass. Based on actual functional requirements, the anti-fog paint layer 3 covers the area on the inner surface of the transparent lamp glass 1 that is not covered by the black lamp glass 2, and is also sprayed onto the inner surface of the black lamp glass 2, achieving dual-area anti-fog treatment. The thickness is 2-5 μm.

[0037] After spraying, the lamp glass is placed in a curing chamber for curing. The lamp glass coated with UV anti-fog paint is slowly transferred within the curing chamber at 60℃ for 10 minutes to activate the anti-fog coating, ensuring leveling and uniform surface thickness. Subsequently, the temperature is slowly increased from 60℃ to 110℃ over 15 minutes to prevent rapid curing of the anti-fog paint and reduce stress on the overlapping areas of the dual-color lamp glass during the UV anti-fog paint curing process. Once the temperature reaches 110℃, the dual-color lamp glass needs to be stably transferred within the curing chamber for 10 minutes to ensure complete curing of the anti-fog paint, preventing issues such as fogging and discoloration caused by incomplete curing, and whitening and cracking caused by over-curing.

[0038] After curing, the lamp glass was removed for visual inspection. Visual inspection and magnification revealed that the overlapping area was intact and free of cracks, the sealing performance was good, and the product's appearance quality met the requirements for automotive lamp assembly.

[0039] This embodiment effectively avoids the stress concentration problem caused by traditional overlapping structures with sharp angles less than 45° by setting a protrusion 4 with a specific geometric shape on the inner surface of the transparent PC lamp glass and connecting the end of the black lamp glass 2 to the sidewall of the protrusion 4. At the same time, it is combined with the recessed part to achieve embedded overlapping, increasing the contact area and improving the bonding strength. On this basis, the dual-area anti-fog paint coating combined with the 110°C high-temperature curing process can be safely implemented without cracking of the overlapping area due to rapid curing reaction. The overall structure significantly improves the injection molding filling performance and thermal stress resistance, greatly improves the product yield, sealing reliability and long-term use stability, and completely solves the technical problem of easy cracking of dual-color lamp glass after spraying anti-fog paint in the prior art.

[0040] Example 2 This utility model also provides a vehicle in which at least one of the headlights, taillights, turn signals, or daytime running lights adopts a bi-color lamp glass structure according to any of the above-described embodiments. This vehicle not only possesses excellent lighting performance and an aesthetically pleasing design, but also exhibits superior weather resistance and structural stability during long-term use, fully meeting the stringent safety and durability requirements of the automotive industry. This utility model represents a new, practical technical solution for the shape and structure of a product, conforming to the definition of a utility model patent under the Chinese Patent Law, and possesses practicality, novelty, and inventiveness.

[0041] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0042] In the description of the embodiments of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0043] In this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-color lamp glass structure, characterized in that, Including transparent light glass (1) and black light glass (2); The inner surface of the transparent lamp glass (1) is provided with an inwardly extending protrusion (4); The black lamp glass (2) is attached to the inner surface of the transparent lamp glass (1), and the end of the black lamp glass (2) is connected to one side wall of the protrusion (4).

2. The dual-color lamp glass structure according to claim 1, characterized in that, The width of the protrusion (4) is greater than 1 mm.

3. The dual-color lamp glass structure according to claim 1, characterized in that, The height of the protrusion (4) is greater than 0.3 mm.

4. A bicolor lamp glass structure according to any one of claims 1 to 3, characterized in that, The protrusion (4) is recessed inward at the root of the side wall near the black lamp glass (2) to form a recess for accommodating the end of the black lamp glass (2); the end of the black lamp glass (2) is embedded in the recess.

5. A dual-color lamp glass structure according to claim 4, characterized in that, The height from the bottom of the recess to the top of the protrusion (4) is greater than 0.5 mm.

6. A dual-color lamp glass structure according to claim 4, characterized in that, The angle between the side wall of the protrusion (4) near the black lamp glass (2) and the surface of the transparent lamp glass (1) is greater than 45°.

7. A dual-color lamp glass structure according to claim 6, characterized in that, The angle between the side wall of the protrusion (4) near the black lamp glass (2) and the surface of the transparent lamp glass (1) is 90°.

8. A dual-color lamp glass structure according to claim 1, characterized in that, The area on the inner surface of the transparent lamp glass (1) not covered by the black lamp glass (2) and the inner surface of the black lamp glass (2) are provided with an anti-fog paint layer (3).

9. A dual-color lamp glass structure according to claim 1, characterized in that, The other sidewall of the protrusion (4) is a slope.

10. A vehicle, characterized in that, Includes the bicolor lamp glass structure as described in any one of claims 1 to 9.

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