Pressure equalized vehicle light lens

Abstract

The utility model belongs to optical imaging equipment technical field, concretely relates to a pressure balance's car lamp lens. It includes lens barrel, still include: light source, set up in the rear part of lens barrel, be used for lighting, lens group, lens group sets up in the inside of lens barrel, is used for focusing and collimating the divergent light line that light source sent, decorative ring, buckle and install the front end of lens barrel, isolate the front end of lens barrel with external environment, sealing element, fill between lens group and lens barrel inner wall, be used for fixing lens group to lens barrel. The utility model is applicable to the car headlamp or daytime running lamp system, guarantees high optical performance at the same time, effectively solves the internal air pressure fluctuation problem caused by the environment temperature difference change, prevents water vapor condensation, sealing failure or structural deformation, thereby promotes the reliability and service life of car lamp.

Description

Technical Field

[0001] This utility model belongs to the field of optical imaging equipment technology, specifically relating to a pressure-balanced vehicle headlight lens. Background Technology

[0002] With the widespread adoption of intelligent driver assistance systems in automobiles, almost every vehicle is now equipped with an in-vehicle imaging system. Intelligent headlight systems integrate traditional headlights with driver assistance functions, providing both illumination and timely feedback to the driver on any abnormalities that occur during vehicle operation, thus enhancing driving safety. The headlight lens is the eye of the intelligent headlight system, directly connected to the LED light source at its rear. Over time, the temperature and internal pressure within the intelligent headlight lens gradually increase, causing changes in the refractive index, radius, and dimensions of the lens components. This results in a decline in the image quality presented by the intelligent headlight system, failing to accurately reflect real-world road conditions to the driver and reducing driving safety. Therefore, providing a headlight lens capable of achieving pressure balance during headlight use is the technical problem this invention aims to solve. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pressure-balanced vehicle headlight lens.

[0004] To achieve the above design objectives, the technical solution adopted by this utility model is as follows: A pressure-balanced headlight lens, including a lens barrel, and further comprising: A light source, located at the rear of the lens barrel, is used for illumination; A lens group, disposed inside the lens barrel, is used to focus and collimate the diverging light emitted by the light source; A decorative ring is fastened to the front end of the lens barrel to isolate the front end of the lens barrel from the external environment; A sealing element is filled between the lens assembly and the inner wall of the lens barrel to fix the lens assembly to the lens barrel.

[0005] Furthermore, the lens group includes an aspherical convex lens, an aspherical concave lens, a first spherical convex lens, and a second spherical convex lens installed in sequence; The aspherical convex lens is positioned near the front end of the lens barrel; The flat surface of the aspherical concave lens is positioned close to the lens barrel, and the concave surface of the aspherical concave lens is positioned close to the first spherical convex lens. The convex surface of the second spherical convex lens is disposed close to the first spherical convex lens, and the concave surface of the second spherical convex lens is disposed close to the rear end of the lens barrel.

[0006] Furthermore, at least two elastic male buckles are symmetrically arranged along the circumferential outer periphery of the front end of the lens barrel, and at least two snap-fit ​​fixing holes are symmetrically arranged along the circumferential direction of the decorative ring corresponding to the positions of the elastic male buckles; The decorative ring is also provided with guide ears; with the optical axis of the lens barrel as the rotation axis, the decorative ring is rotated by holding the guide ears, so that each of the snap-fit ​​fixing holes presses against the outer side of the elastic male buckle. The elastic deformation of the elastic male buckle and the snap-fit ​​limiting of the snap-fit ​​fixing holes make the decorative ring fit and lock tightly to the front end of the lens barrel.

[0007] Furthermore, a dotted groove is formed between the lens assembly and the inner wall of the lens barrel; the sealant includes sealant, which is filled in the dotted groove to fix the side of the lens assembly to the inner wall of the lens barrel.

[0008] Furthermore, a vent is provided on the inner wall of the lens barrel near the aspherical concave lens, and the vent connects the outer wall and the inner wall of the lens barrel; the aspherical concave lens has a flat surface symmetrically cut along the optical axis, and the gap between the flat surface and the lens barrel forms an air channel; the radial position of the vent is located on the air channel and communicates with the air channel.

[0009] Furthermore, an air guide groove is provided at the contact position between the inner wall of the lens barrel and the side of the first spherical convex lens. The air guide groove is used to connect the airflow between the first spherical convex lens and the second spherical convex lens with the air passage. An air vent is provided on the plane of the aspherical concave lens near the first spherical convex lens. The air vent communicates with the air passage.

[0010] Furthermore, a breathable, waterproof, and dustproof membrane is also laid on the vent.

[0011] Furthermore, the outer side of the lens barrel is symmetrically fitted with flanges along the radial direction. The flanges have multiple oblong holes and pin holes. The flanges are connected to the fixed bracket of the vehicle. The fixed bracket is connected to the flanges through fasteners inserted in the oblong holes to achieve fine adjustment of the position of the lens barrel in a preset direction. The fixed bracket is connected to the flanges through locating pins inserted in the pin holes to achieve angle positioning or angle adjustment of the lens barrel.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This application mainly consists of core components such as a lens barrel, a light source module, a lens assembly, a decorative ring, seals, and a flange. This device is suitable for automotive headlights or daytime running lights, effectively solving the problem of internal air pressure fluctuations caused by changes in ambient temperature while ensuring high optical performance. It prevents moisture condensation, seal failure, or structural deformation, thereby improving the reliability and lifespan of the vehicle light.

[0013] The headlight lens achieves dynamic pressure balance by incorporating an air channel and a breathable waterproof membrane inside the lens barrel. It also employs a multi-level optical lens combination and a precision assembly structure to ensure light output quality. Furthermore, the decorative ring design with elastic buckles and a guide rotation installation enables quick assembly and reliable locking, combining aesthetics with engineering practicality.

[0014] After using this lens, as the LED light source operates for longer, the internal temperature of the lens gradually increases, and the pressure increases. The internal gas flows to the outside of the lens through the air guide groove, air channel, vent, and air channel, passing through the breathable, dustproof, and waterproof membrane. Finally, the air pressure inside and outside the lens is balanced, and the optical performance of the lens is not affected by the pressure difference. This ensures that the image of the intelligent vehicle lighting system is stable and controllable, and improves driving safety. Attached Figure Description

[0015] Figure 1 This is a outline diagram of a pressure-balanced vehicle headlight lens according to this utility model. Figure 2 is a schematic diagram of a pressure-balanced vehicle headlight lens according to this utility model.

[0016] Figure 3 is a cross-sectional view of a pressure-balanced vehicle headlight lens according to this utility model.

[0017] Figure 4 is a diagram of a pressure-balanced headlight lens fixing adhesive according to this utility model.

[0018] Figure 5 is an airflow diagram of a pressure-balanced car headlight lens according to this utility model.

[0019] Figure 6 is a schematic diagram of a pressure-balanced aspherical concave lens for vehicle headlights according to this utility model.

[0020] The attached diagram shows: 1: Decorative ring, 11: Fixing port, 12: Guide ear, 2: Lens barrel, 21: Male thread, 22: Flange, 221: Pin hole, 222: Waist-shaped hole, 223: Anti-collision platform, 231: Glue groove, 232: Air guide groove, 233: Vent hole, 3: Lens group, 31: Aspherical convex lens, 32: Aspherical concave lens, 33: First spherical convex lens, 34: Second spherical convex lens, 4: Sealant, 5: Breathable, waterproof and dustproof membrane, 6: LED light source, 7: Air passage, 8: Cutting plane, 9: Vent groove. Detailed Implementation

[0021] To further illustrate the technical means and effects of this utility model in order to achieve its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0022] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate.

[0023] It should be noted that, in this application, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0024] Example like Figure 1-6 As shown, this embodiment specifically relates to a pressure-balanced vehicle headlight lens, which includes a lens barrel 2, a light source, a lens group 3, a decorative ring 1, and a seal. It is suitable for automotive headlights or daytime running lights systems. While ensuring high optical performance, it effectively solves the problem of internal air pressure fluctuations caused by changes in ambient temperature, thereby improving the reliability and service life of the vehicle headlight.

[0025] The light source is an LED light source, located at the rear of the lens barrel 2 for illumination. The light source is positioned along the axis of the lens barrel 2, and the initial beam emitted is divergent, then collimated and focused by the subsequent lens group 3. The lens barrel 2 is made of LCP liquid crystal polymer material.

[0026] Lens group 3 is disposed inside the lens barrel 2 and is used to focus and collimate the diverging light emitted by the light source. Lens group 3 includes an aspherical convex lens 31, an aspherical concave lens 32, a first spherical convex lens 33, and a second spherical convex lens 34, which are arranged sequentially. The aspherical convex lens 31 is disposed near the front end of the lens barrel 2. The flat surface of the aspherical concave lens 32 is disposed near the lens barrel 2, and the concave surface of the aspherical concave lens 32 is disposed near the first spherical convex lens 33. The convex surface of the second spherical convex lens 34 is disposed near the first spherical convex lens 33, and the concave surface of the second spherical convex lens 34 is disposed near the rear end of the lens barrel 2.

[0027] The second spherical convex lens 34 is located at the end of lens group 3, closest to the light source. Its convex surface faces forward, connecting to the second spherical convex lens 34, while its concave surface faces backward towards the light source. This configuration creates an air-spacing, near-cemented doublet structure between the two lenses, enabling them to work together to finely correct residual spherical aberration, axial chromatic aberration, and field curvature. The first spherical convex lens 33 performs secondary focusing on the pre-modulated beam. The aspherical concave lens 32 appropriately re-diversifies the converged beam to adjust the overall focal length and avoid energy concentration caused by over-focusing. The aspherical convex lens 31 converges the modulated diverging beam from the rear, improving the system's light transmission efficiency.

[0028] Decorative ring 1 is fastened to the front end of the lens barrel 2, isolating the front end of the lens barrel 2 from the external environment. At least two elastic male buckles 21 are symmetrically arranged along the outer periphery of the front end of the lens barrel 2, forming a cantilever beam structure. At least two snap-fit ​​fixing ports 11 are symmetrically arranged along the upper periphery of the decorative ring 1 corresponding to the positions of the elastic male buckles 21. Each fixing port 11 includes an inclined guide section and a horizontal limiting shoulder.

[0029] The decorative ring 1 is also provided with a guide ear 12, which facilitates manual or mechanical clamping. With the optical axis of the lens barrel 2 as the rotation axis, the decorative ring 1 is rotated by holding the guide ear 12, so that each of the snap-fit ​​fixing ports 11 presses against the outer side of the elastic male buckle 21 in a corresponding manner. By utilizing the elastic deformation of the elastic male buckle 21 and the snap-fit ​​limiting of the snap-fit ​​fixing port 11, the decorative ring 1 is locked to the front end of the lens barrel 2.

[0030] During installation, insert the decorative ring 1 onto the front end of the lens barrel 2, aligning the snap-fit ​​fixing port 11 with the elastic male buckle 21. Then, rotate clockwise around the optical axis by a certain angle. During this process, the guide ear 12 guides the rotation, and the beveled surface of the snap-fit ​​port pushes the elastic male buckle 21 outward. When rotated to the predetermined position, the male buckle 21 springs back into the underside of the limiting shoulder, completing the self-locking. This structure can be assembled without additional screws or tools, and disassembly and maintenance are extremely convenient, meeting the needs of modern automotive manufacturing for modular and fast-paced production. At the same time, the design of the snap-fit ​​and limiting structure ensures sufficient tensile strength and shock resistance.

[0031] A sealing element is filled between the lens assembly 3 and the inner wall of the lens barrel 2 to fix the lens assembly 3 to the lens barrel 2. A dotted adhesive groove 231 is formed between the lens assembly 3 and the inner wall of the lens barrel 2. The sealing element includes sealant 4, which can be silicone or UV adhesive. The sealant 4 is filled in the dotted adhesive groove 231 to fix the side of the lens assembly 3 to the inner wall of the lens barrel 2. After the adhesive is fixed, its thickness and height are greater than 1 mm. In this application, the aspherical convex lens 31 and the second spherical convex lens are completely sealed to the inner wall of the lens barrel by sealant, thus ensuring a sealed connection at both the front and rear ends of the lens barrel. In the sealed environment inside the lens barrel, to balance the pressure inside and outside the lens barrel, a gas guide groove 232, a gas channel 7, a vent hole 233, and a vent groove 9 are designed in this application to allow gas to circulate inside and outside the lens barrel, thereby achieving pressure balance.

[0032] A vent 233 is provided on the inner wall of the lens barrel 2 near the aspherical concave lens 32. The vent 233 connects the outer and inner walls of the lens barrel 2. The vent 233 is circular with a diameter greater than 7 mm and serves as an outlet for free airflow between the inside and outside of the lens. A flat surface is symmetrically cut along the optical axis on the aspherical concave lens 32. The gap between the flat surface and the lens barrel 2 forms an air channel 7. The vent 233 is radially positioned on and communicates with the air channel 7. The height of the air channel 7 is greater than 0.3 mm.

[0033] An air guide groove 232, which is arc-shaped or V-shaped, is provided at the contact position between the inner wall of the lens barrel 2 and the side of the first spherical convex lens 33. The air guide groove 232 is used to connect the airflow between the first spherical convex lens 33 and the second spherical convex lens 34 with the air passage 7. An air passage groove 9 is provided on the cutting plane 8 of the aspherical concave lens 32 near the first spherical convex lens 33. The air passage groove 9 is connected to the air passage 7 and is used to connect the airflow between the first spherical convex lens 33 and the second spherical convex lens 34 to the air passage 7.

[0034] The arrangement of the air guide groove 232, air channel 7, air vent 233, and air groove 9 ensures that the spaces between any two adjacent lenses in the aspherical convex lens 31, aspherical concave lens 32, first spherical convex lens 33, and second spherical convex lens 34 are interconnected, thereby enabling gas flow. A breathable, waterproof, and dustproof membrane 5 is also laid on the air vent 233. The breathable, waterproof, and dustproof membrane 5 is made of expanded polytetrafluoroethylene (ePTFE) with a dustproof and waterproof rating greater than or equal to IP67. It should also be noted that... Figure 3 In the dispensing tank and Figure 5 The air guide channels are not in the same position. Figure 3 and Figure 5 These are cross-sectional views after rotating the microscope tube at different angles.

[0035] To address the issues of fogging and bulging common in traditional vehicle headlights, this invention innovatively introduces an active pressure balancing mechanism: An air passage 7 is axially formed on the inner wall of the lens barrel 2 corresponding to the contact area of ​​the aspherical concave lens 32; a vent 233 is provided at a corresponding position on the side wall of the lens barrel 2, connecting the air guide groove 232 to the external atmosphere; a breathable, waterproof, and dustproof membrane 5 is covered at the outlet of the vent 233, allowing air molecules to pass freely but preventing the intrusion of liquid water, dust, and pollutants. When the vehicle experiences altitude changes or day-night temperature differences during driving, the air inside the lamp cavity generates a pressure difference due to thermal expansion and contraction. At this time, the gas can exchange with the outside through the air guide groove 232, vent 233, air passage 7, and breathable membrane, achieving dynamic pressure balance, preventing excessive stress on the seals and aging damage, and eliminating the possibility of condensation formation.

[0036] A flange portion 22 is symmetrically installed radially on the outside of the lens barrel 2. The flange portion 22 has multiple waist-shaped holes 222 and pin holes 221. The flange portion 22 is connected to the fixed bracket of the vehicle. The fixed bracket is connected to the flange portion 22 by fasteners passing through the waist-shaped holes 222 to achieve fine adjustment of the position of the lens barrel 2 in a preset direction. The fixed bracket is connected to the flange portion 22 by positioning pins passing through the pin holes 221 to achieve angle positioning or angle adjustment of the lens barrel 2.

[0037] The oblong hole 222 allows the fastener to slide along the optical axis within its range. By adjusting the position of the bolt within the oblong hole 222, a slight translational adjustment of the lens barrel 2 in the vertical or horizontal direction can be achieved to compensate for assembly tolerances; the pin hole 221 is located near the oblong hole 222 and is used to insert a locating pin. Once the position is accurate, inserting the locating pin locks the final coordinates and prevents loosening.

[0038] A collision avoidance platform 223 is provided on the flange portion 22 of the lens barrel 2 to prevent collisions between the lens barrel 2 and the LED light source 6 fixed on the vehicle mounting bracket during focusing. During focusing, the lens barrel 2 will shift position along the optical axis. Due to potential human error, minor deviations in mechanical transmission, or instability during operation, there is a risk of a hard collision between the lens barrel 2 and the LED light source 6. Such a collision could damage the high-precision optical components of the lens barrel 2, affecting subsequent image quality, and could also damage the LED light source 6, leading to equipment malfunction or even complete failure. The collision avoidance platform 223 prevents further movement of the lens barrel 2 before it comes into contact with the LED light source 6, effectively avoiding direct collisions between them.

[0039] like Figure 5As shown, when using this utility model, before operation, the lens group 3 is installed into the lens barrel 2, and the sealant 4 is applied to the glue application groove 231. After the sealant 4 has cured, the decorative ring 1 is fastened, and the LED light source 6 is turned on. Then, the focus is adjusted and fixed by adjusting the position of the waist-shaped hole 222 of the flange 22 on the car mounting bracket. As the internal temperature of the lens gradually increases and the pressure increases, the internal gas flows to the outside of the lens through the air guide groove 232, the air outlet groove, the air passage 7 and the vent 233 through the breathable dustproof and waterproof membrane 5. Finally, the air pressure inside and outside the lens is balanced, and the optical performance of the lens is not affected by the pressure difference, ensuring that the image of the intelligent vehicle lighting system is stable and controllable, and the information fed back to the driver is safe and reliable.

[0040] The workflow of this utility model is as follows: When the power is turned on, the LED light source lights up and emits divergent light. The light passes through a four-lens group 3 consisting of a second spherical convex lens 34, a first spherical convex lens 33, an aspherical concave lens 32, and an aspherical convex lens 31 in sequence, and is gradually collimated and focused to form a standard light pattern. When changes in the external environment cause fluctuations in the cavity pressure, the gas automatically adjusts through the air guide groove 232—vent hole 233—ventilation membrane path to maintain consistent internal and external pressure. The decorative ring 1 is firmly installed at the front end through a rotating buckle structure, serving both as a sealing aid and an aesthetic decoration function. The entire lens is connected to the vehicle body bracket through the flange 22, supporting fine adjustment of position and angle to ensure accurate beam pointing.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A pressure-balanced automotive headlight lens, comprising a lens barrel, characterized in that, Also includes: A light source, located at the rear of the lens barrel, is used for illumination; A lens group, disposed inside the lens barrel, is used to focus and collimate the diverging light emitted by the light source; A decorative ring is fastened to the front end of the lens barrel to isolate the front end of the lens barrel from the external environment; A sealing element is filled between the lens assembly and the inner wall of the lens barrel to fix the lens assembly to the lens barrel.

2. A pressure-balanced headlight lens according to claim 1, characterized in that, The lens group includes an aspherical convex lens, an aspherical concave lens, a first spherical convex lens, and a second spherical convex lens, which are installed in sequence. The aspherical convex lens is positioned near the front end of the lens barrel; The flat surface of the aspherical concave lens is positioned close to the lens barrel, and the concave surface of the aspherical concave lens is positioned close to the first spherical convex lens. The convex surface of the second spherical convex lens is disposed close to the first spherical convex lens, and the concave surface of the second spherical convex lens is disposed close to the rear end of the lens barrel.

3. A pressure-balanced headlight lens according to claim 2, characterized in that, At least two elastic male buckles are symmetrically arranged along the outer periphery of the front end of the lens barrel, and at least two snap-fit ​​fixing holes are symmetrically arranged along the upper periphery of the decorative ring corresponding to the positions of the elastic male buckles. The decorative ring is also provided with guide ears; with the optical axis of the lens barrel as the rotation axis, the decorative ring is rotated by holding the guide ears, so that each of the snap-fit ​​fixing holes presses against the outer side of the elastic male buckle. The elastic deformation of the elastic male buckle and the snap-fit ​​limiting of the snap-fit ​​fixing holes make the decorative ring fit and lock tightly to the front end of the lens barrel.

4. A pressure-balanced headlight lens according to claim 3, characterized in that, A dotted groove is formed between the lens assembly and the inner wall of the lens barrel; the sealing element includes sealant, which is filled in the dotted groove to fix the side of the lens assembly to the inner wall of the lens barrel.

5. A pressure-balanced headlight lens according to claim 4, characterized in that, A vent is provided on the inner wall of the lens barrel near the aspherical concave lens, and the vent connects the outer wall and the inner wall of the lens barrel; the aspherical concave lens has a flat surface symmetrically cut along the optical axis, and the gap between the flat surface and the lens barrel forms an air channel; the radial position of the vent is located on the air channel and is connected to the air channel.

6. A pressure-balanced headlight lens according to claim 5, characterized in that, An air guide groove is provided at the contact position between the inner wall of the lens barrel and the side of the first spherical convex lens. The air guide groove is used to connect the airflow between the first spherical convex lens and the second spherical convex lens with the air passage. An air vent is provided on the plane of the aspherical concave lens near the first spherical convex lens. The air vent is connected to the air passage.

7. A pressure-balanced headlight lens according to claim 6, characterized in that, A breathable, waterproof, and dustproof membrane is also laid over the ventilation holes.

8. A pressure-balanced headlight lens according to claim 7, characterized in that, The lens barrel is symmetrically mounted with flanges. The flanges have multiple oblong holes and pin holes. The flanges are connected to the fixed bracket of the vehicle. The fixed bracket is connected to the flange through fasteners passing through the oblong holes to achieve fine adjustment of the position of the lens barrel in a preset direction. The fixed bracket is connected to the flange through locating pins passing through the pin holes to achieve angle positioning or angle adjustment of the lens barrel.

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