A vehicle headlight lens with automatic aperture adjustment structure for lighting effect control

Abstract

This utility model discloses a vehicle headlight lens with an automatic aperture adjustment structure for controlling lighting effect. The lens assembly includes a lens cap, a first lens group, a first lens barrel, and a second lens group. The lens cap and the first lens barrel are assembled to form a first assembly cavity. The first lens group is correspondingly assembled within the first assembly cavity, and the second lens group is correspondingly assembled on the opposite side of the first lens barrel from the lens cap. The assembly also includes an automatic aperture adjustment structure, comprising an aperture adjustment mechanism, a drive motor, and an FPC (Flexible Printed Circuit). The automatic aperture adjustment structure is correspondingly installed on the side of the first lens barrel facing the second lens group. The power output end of the drive motor is connected to the transmission component of the aperture adjustment mechanism. One end of the FPC is electrically connected to the drive motor, and the other end of the FPC is connected to a circuit board. This improves lens performance, allowing the vehicle headlight lens to control the intensity of light during illumination, thus enhancing driving safety.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, and specifically discloses a vehicle headlight lens with an automatic aperture structure for lighting effect control. Background Technology

[0002] With the development of electric vehicles, the requirements for vehicle lighting are becoming increasingly stringent. Vehicle lighting lenses need to form patterns through imaging illumination to remind drivers to drive safely, especially at night, where they play a crucial role in safety. Vehicle lighting lenses include components such as imaging lenses, lens barrels, spacers, and automatic aperture adjustment. For example, Chinese patent application publication number CN117072904A, published on November 17, 2023, discloses a lens assembly and an automotive lamp using the same, comprising: a first lens, a second lens, a third lens, and a fourth lens sequentially arranged on the light-emitting surface side of the automotive lamp's light source; wherein the third lens has negative optical power; the first, second, and fourth lenses all have positive optical power; and the first lens is a single glass lens; the third lens is a single glass lens, a single plastic lens, or a composite lens formed by a glass lens and a plastic lens; and the fourth lens is a single plastic lens. A drawback of this prior art is that the vehicle lighting lens has a fixed aperture structure, which prevents adjustment of the brightness of the headlight. Therefore, improvements are urgently needed. Utility Model Content

[0003] Therefore, it is necessary to address the existing technical problems by providing a vehicle headlight lens with an automatic aperture structure for lighting effect control, thereby improving lens performance and enabling the vehicle headlight lens to control the intensity of light during illumination, which is more conducive to safe driving.

[0004] To address the problems of existing technologies, this utility model discloses a vehicle headlight lens with an automatic aperture adjustment structure for lighting effect control. The lens assembly includes a lens cap, a first lens group, a first lens barrel, and a second lens group. The lens cap and the first lens barrel are assembled to form a first assembly cavity. The first lens group is correspondingly assembled within the first assembly cavity, and the second lens group is correspondingly assembled on the opposite side of the first lens barrel from the lens cap. The assembly also includes an automatic aperture adjustment structure. The automatic aperture adjustment structure includes an aperture adjustment mechanism, a drive motor, and an FPC (Flexible Printed Circuit). The automatic aperture adjustment structure is correspondingly installed on the side of the first lens barrel facing the second lens group. The power output end of the drive motor is connected to the transmission component of the aperture adjustment mechanism. One end of the FPC is electrically connected to the drive motor, and the other end of the FPC is connected to a circuit board.

[0005] Preferably, the first lens group includes a first lens, a second lens, and a third lens sequentially from the lens cap side to the automatic aperture adjustment structure side, and the first lens, the second lens, and the third lens are coaxially and detachably installed in the first lens barrel.

[0006] Preferably, the second lens is fixedly connected to the inner wall of the first lens barrel through a first adhesive layer.

[0007] Preferably, the second lens group includes a fourth lens and a second lens barrel; the fourth lens is correspondingly fitted inside the second lens barrel and is fixedly connected to the inner sidewall of the second lens barrel by a second adhesive layer.

[0008] Preferably, mounting lugs A are formed on the outer side of the adjusting aperture on both sides, and mounting lugs B are provided on the outer edge of the first lens barrel at the position corresponding to the mounting lugs A. The mounting lugs A and the mounting lugs B are fixed together by M2 screws.

[0009] Preferably, a first buckle protrusion is formed on the side corresponding to the first lens barrel and the second lens barrel, and the second lens barrel is embedded in the first lens barrel, with the side of the second lens barrel facing the light source contacting the first buckle protrusion.

[0010] Preferably, the lens cap is provided with a latch arm on each of its opposite sides along its length, and the outer sides of the first lens barrel are provided with a second latching protrusion that cooperates with the latch arm; the second latching protrusion is correspondingly embedded in the latch arm to achieve the fastening and fixing of the lens cap and the first lens barrel.

[0011] This invention is particularly suitable for scenarios requiring coordinated control of lighting parameters based on changes in vehicle load and ambient lighting conditions. Unlike traditional camera aperture adjustment technology, which focuses on image quality optimization (such as exposure balance and depth of field control), this technology is designed specifically for the needs of vehicle headlight illumination, focusing on solving dynamic anti-glare and driving safety issues.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. By setting an automatic aperture adjustment structure, the headlight lens can control the intensity of light during illumination, which is more conducive to safe driving; the automatic aperture adjustment structure is also more conducive to improving the performance of the headlight lens.

[0014] 2. The aperture and the first lens barrel are fixed by M2 screws. The first lens barrel and the second lens barrel are fixed by a buckling protrusion. The second buckling protrusion is embedded in the buckling arm to realize the buckling and fixing of the lens cap and the first lens barrel, which facilitates assembly and thus reduces the cost of the lens. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention.

[0016] Figure 2 This is an exploded view of the present invention.

[0017] Figure 3 This is a sectional view of the present invention.

[0018] Figure 4 This is a cross-sectional view of the present invention.

[0019] Figure 5 This is an assembly diagram of the present invention in use.

[0020] Figure 6 A stereoscopic view (looking down) of the automatically adjusting aperture structure.

[0021] Figure 7 A three-dimensional view (top view) of the automatically adjusting aperture structure.

[0022] Figure 8 A stereoscopic view of the automatically adjusting aperture structure (viewed from below with the base plate hidden).

[0023] Figure 9 A three-dimensional view of the automatic aperture structure (showing the blades).

[0024] The attached figures are labeled as follows: lens cap 10, first adhesive layer 11, first lens group 12, second lens group 13, second adhesive layer 14, light source 15, mounting lug B 16, blade 17, mounting lug A 18, drive motor 21, FPC 19, first lens 20, lens assembly 22, circuit board connection 23, hinge 25, drive ring 26, slide groove 28, pin 27, first buckle protrusion 29, second lens 30, third lens 40, first lens barrel 50, aperture adjustment 60, fourth lens 70, second lens barrel 90, M2 screw 80. Detailed Implementation

[0025] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0026] refer to Figures 1 to 9 .

[0027] This utility model discloses a vehicle headlight lens with an automatic aperture adjustment structure for lighting effect control, including a lens assembly 22. The lens assembly 22 includes a lens cover 10, a first lens group 12, a first lens barrel 50, and a second lens group 13. The lens cover 10 and the first lens barrel 50 are assembled to form a first assembly cavity. The first lens group 12 is correspondingly assembled in the first assembly cavity, and the second lens group 13 is correspondingly assembled on the opposite side of the first lens barrel 50 from the lens cover 10. It also includes an automatic aperture adjustment structure. The automatic aperture adjustment structure includes an aperture adjustment 60, a drive motor 21, and an FPC 19. The automatic aperture adjustment structure is correspondingly installed on the side of the first lens barrel 50 facing the second lens group 13. The power output end of the drive motor 21 is connected to the transmission component of the aperture adjustment 60. One end of the FPC 19 is electrically connected to the drive motor 21, and the other end of the FPC 19 is connected to a circuit board 23.

[0028] The first lens group 12 includes a first lens 20, a second lens 30 and a third lens 40 sequentially from the lens cap 10 side to the automatic aperture adjustment structure side. The first lens 20, the second lens 30 and the third lens 40 are coaxially and detachably installed in the first lens barrel 50.

[0029] The second lens 30 is fixedly connected to the inner wall of the first lens barrel 50 through the first adhesive layer 11. The second lens group 13 includes a fourth lens 70 and a second lens barrel 90; the fourth lens 70 is correspondingly fitted into the second lens barrel 90 and fixedly connected to the inner wall of the second lens barrel 90 through the second adhesive layer 14.

[0030] Mounting lugs A18 are formed on opposite sides of the outer surface of the aperture 60. Mounting lugs B16 are provided on the outer edge of the first lens barrel 50 at positions corresponding to mounting lugs A18. Mounting lugs A18 and B16 are fixed together by M2 screws 80. Retaining arms 31 are provided on opposite sides along the length of the lens cap 10. Second retaining protrusions 32, which mate with the retaining arms 31, are provided on opposite sides of the outer surface of the first lens barrel 50 along its length. The second retaining protrusions 32 are embedded within the retaining arms 31 to secure the lens cap 10 and the first lens barrel 50. A first retaining protrusion 29 is formed on the side of the first lens barrel 50 corresponding to the second lens barrel 90. The side of the second lens barrel 90 that is embedded within the first lens barrel 50 and faces the light source 15 contacts the first retaining protrusion 29. This structural design facilitates assembly, thereby reducing lens costs.

[0031] During assembly, the third lens 40, the second lens 30, and the first lens 20 are sequentially installed into the first lens barrel 50, and the lens cap 10 is snapped into the first lens barrel 50, thereby assembling the first lens group 12; the fourth lens 70 is correspondingly fitted into the second lens barrel 90 to form the second lens group 13; the aperture 60 is adjusted and inserted into the first lens group 12 and secured with M2 screws 80, and the second lens group 13 is then inserted into the first lens group 12, locked in place, and fixed with glue.

[0032] The automatic aperture adjustment structure disclosed in this embodiment can adopt existing technologies. It is only necessary to make the shape of the aperture 60 match the headlight lens. The automatic aperture adjustment structure and principle in this embodiment are as follows:

[0033] The basic structure consists of blades and mechanical linkage:

[0034] Blade assembly: Consists of multiple overlapping curved metal blades 17 (usually 5-18 blades), forming a nearly circular aperture at the center. The more blades 17 there are, the closer the aperture shape is to a perfect circle, and the more precise the light intake control.

[0035] Linkage mechanism: Each blade is fixed at one end by a hinge 25, and the other end is equipped with a pin 27, which is embedded in the groove 28 of a rotatable drive ring 26. When the drive ring 26 rotates, it will push the pins 27 of all blades 17 to move synchronously, so that the blades 17 open and close at the same time, thereby changing the size of the central aperture.

[0036] Drive core: Motor and electromagnetic system. The motor typically uses a miniature stepper motor or electromagnetic drive device. After receiving electrical signals from the camera control system, the motor drives the aforementioned drive ring to rotate via gears or directly. Some designs use a combination of a winding frame and a magnet. When energized, the coil generates a magnetic field, attracting the magnet crank to swing, which in turn drives the blade linkage mechanism via the swing arm. This design allows for high precision and stepless adjustment.

[0037] Signal input: The vehicle headlight sensor detects the ambient light intensity and generates an electrical signal, which is then sent to the control system.

[0038] Real-time adjustment: The control system calculates the required aperture value and drives the motor to rotate at a specific angle. For example, when the light dims, the motor will widen the aperture (increase the blade opening); when the light is overexposed, it will narrow the aperture.

[0039] Feedback mechanism: High-end lenses include aperture position sensors to monitor the opening and closing status of the aperture blades in real time, ensuring accuracy and preventing error accumulation.

[0040] The core of automatic aperture is the synergy of mechanical linkage of blades, motor drive, and electronic control, which ultimately achieves high-precision adjustment of the amount of light entering the system.

[0041] While automatic aperture adjustment structures are widely used in camera systems, their core objective is to optimize image quality. This involves controlling the amount of light entering the camera through aperture adjustment, and coordinating with shutter speed and gain parameters to ensure image sharpness, contrast, and depth of field under varying lighting conditions. The technology emphasizes precise coordination of optical parameters (such as exposure triangle balancing) to meet the detailed requirements of image capture (such as low noise and high dynamic range). This invention, applied to automotive lighting, focuses on optimizing lighting safety and adaptability. For example, it automatically adjusts the headlight beam height based on vehicle load (such as changes in passenger or cargo weight) to avoid glare for oncoming vehicles, or automatically switches between high and low beams based on ambient light intensity (such as tunnel entrances / exits). The key technological focus is on dynamically responding to driving conditions (such as vehicle speed, tilt angle, and lighting) to ensure road lighting complies with safety regulations (such as ECE standards).

[0042] The above-described embodiments are merely one implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A vehicle headlight lens with automatic aperture adjustment structure for lighting effect control, comprising a lens assembly (22), the lens assembly (22) comprising a lens cap (10), a first lens group (12), a first lens barrel (50), and a second lens group (13), wherein the lens cap (10) and the first lens barrel (50) are assembled to form a first assembly cavity, the first lens group (12) is correspondingly assembled in the first assembly cavity, and the second lens group (13) is correspondingly assembled on the opposite side of the first lens barrel (50) from the lens cap (10), characterized in that, It also includes an automatic aperture adjustment structure; the automatic aperture adjustment structure includes an aperture adjustment (60), a drive motor (21), and an FPC (19); the automatic aperture adjustment structure is installed on the side of the first lens barrel (50) facing the second lens group (13); the power output end of the drive motor (21) is connected to the transmission component of the aperture adjustment (60), one end of the FPC (19) is electrically connected to the drive motor (21), and the other end of the FPC (19) is connected to the circuit board (23).

2. A vehicle headlight lens with automatic aperture adjustment structure for lighting effect control according to claim 1, characterized in that, The first lens group (12) includes a first lens (20), a second lens (30) and a third lens (40) sequentially from the lens cap (10) side to the automatic aperture structure side. The first lens (20), the second lens (30) and the third lens (40) are coaxially and detachably installed in the first lens barrel (50).

3. A vehicle headlight lens with automatic aperture adjustment structure for lighting effect control according to claim 2, characterized in that, The second lens (30) is fixedly connected to the inner wall of the first lens barrel (50) through the first adhesive layer (11).

4. A vehicle headlight lens with automatic aperture adjustment structure for lighting effect control according to claim 1, characterized in that, The second lens group (13) includes a fourth lens (70) and a second lens barrel (90); the fourth lens (70) is correspondingly fitted inside the second lens barrel (90) and is fixedly connected to the inner wall of the second lens barrel (90) through a second adhesive layer (14).

5. A vehicle headlight lens with automatic aperture adjustment structure and illumination effect control according to any one of claims 1-4, characterized in that, The outer side of the adjustment aperture (60) has mounting lugs A (18) on both sides. The outer edge of the first lens barrel (50) is provided with mounting lugs B (16) at the position corresponding to the mounting lugs A (18). The mounting lugs A (18) and B (16) are fixed together by M2 screws (80).

6. A vehicle headlight lens with automatic aperture adjustment structure for lighting effect control according to claim 4, characterized in that, A first buckle protrusion (29) is formed on the side of the first lens tube (50) corresponding to the second lens tube (90). The second lens tube (90) is embedded in the first lens tube (50), and the side of the second lens tube (90) facing the light source (15) abuts against the first buckle protrusion (29).

7. A vehicle headlight lens with automatic aperture adjustment structure for lighting effect control according to claim 1, characterized in that, The lens cap (10) has a latch arm (31) on each of its opposite sides along its length, and the outer sides of the first lens barrel (50) on each of its opposite sides along its length are provided with a second latching protrusion (32) that cooperates with the latch arm (31); the second latching protrusion (32) is embedded in the latch arm (31) to achieve the fastening and fixing of the lens cap (10) and the first lens barrel (50).

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