A telescopic nested LED vehicle lamp module dynamic focal length adjusting device

Abstract

This utility model discloses a telescopic nested LED vehicle light module dynamic focus adjustment device, relating to the field of automotive lighting technology. It includes a mounting plate, with a light source module at its bottom. One end of the light source module has an outer sleeve, and the inner wall of the outer sleeve has an inner tube. The outer wall of the inner tube has an annular side plate. An end cap is fitted onto the outer wall of the inner tube away from the end where the light source module is located. A first electric push rod is located on the side wall of the annular side plate, on one side of the inner tube, and a laser ranging sensor is located on the side wall of the annular side plate, on the other side of the inner tube. A second electric push rod is fixedly mounted on the outer wall of the outer sleeve. This utility model solves the technical problems of low focus adjustment accuracy, slow response, and poor environmental adaptability in traditional vehicle lights, providing a highly reliable and high-precision dynamic focus adjustment solution for intelligent vehicle lights.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of automotive lighting, specifically a telescopic nested LED headlight module dynamic focus adjustment device. Background Technology

[0002] Most existing LED automotive headlight modules use a fixed focal length design, which cannot dynamically adjust the beam pattern according to driving scenarios (such as urban roads, highways, and curves). This results in a limited range of lighting effects and makes it difficult to simultaneously meet the needs of low-beam anti-glare and high-beam focusing. While some adjustable-focus headlights achieve focal length adjustment through gear transmission or hydraulic drive, they suffer from problems such as complex structure, large size, slow response, and low precision. Furthermore, they lack closed-loop feedback control, making it difficult to meet the high-precision requirements of adaptive lighting in intelligent driving systems. In addition, traditional adjustment mechanisms are prone to jamming or displacement deviation in high-temperature or vibration environments, leading to headlight malfunction and affecting driving safety.

[0003] Therefore, there is an urgent need for a high-precision, fast-response, and environmentally adaptable dynamic focus adjustment device. Utility Model Content Based on this, the purpose of this utility model is to provide a telescopic nested LED vehicle light module dynamic focus adjustment device to solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: The device includes a mounting plate, a light source module at the bottom of the mounting plate, an outer sleeve at one end of the light source module, an inner tube on the inner wall of the outer sleeve, an annular side plate on the outer wall of the inner tube, an end cap on the outer wall of the inner tube away from the end where the light source module is located, a first electric push rod on the side wall of the annular side plate located on one side of the inner tube, a laser ranging sensor on the side wall of the annular side plate located on the other side of the inner tube, and a second electric push rod fixedly mounted on the outer wall of the outer sleeve.

[0005] Preferably, the sliding limiting method between the outer sleeve and the inner tube and the sliding limiting method between the inner tube and the end cap both adopt linear sliding grooves; wherein, the outer sleeve is located on both sides, and the end cap is located on the top and bottom.

[0006] Preferably, a lens is fixed to both the inner cavity of the inner tube and one end of the end cap.

[0007] Preferably, the first electric push rod actuator is connected to the side wall of the end cap.

[0008] Preferably, the actuating end of the second electric actuator is connected to the side wall of the annular side plate.

[0009] Preferably, a reflector is provided on the other side of the end cap, and the reflector and the laser rangefinder are located on the same axis.

[0010] In summary, this technical solution has the following main advantages: In this invention, a dual-stage adjustment mechanism (the second electric push rod drives the inner tube to extend and retract as a whole + the first electric push rod drives the end cover to fine-tune) combined with laser ranging closed-loop feedback is used to achieve focal length control accuracy and repeatability error, which is significantly better than the traditional mechanical adjustment method. Nested design reduces size, makes structure compact, and enhances environmental adaptability. Attached Figure Description Figure 1 Axonometric view of the overall structure of this utility model Figure 1 ; Figure 2 Axonometric view of the overall structure of this utility model Figure 2 ; Figure 3 Axonometric view of the overall structure of this utility model Figure 3 .

[0011] Figure descriptions: 10. Mounting plate; 11. Light source module; 12. Outer sleeve; 13. Inner tube; 14. Annular side plate; 15. End cap; 151. Reflector; 16. First electric push rod; 17. Laser rangefinder sensor; 18. Second electric push rod; 19. Lens. Detailed Implementation

[0012] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0013] Example like Figures 1 to 3 As shown, the device includes a mounting plate 10, a light source module 11 at the bottom of the mounting plate 10, an outer sleeve 12 at one end of the light source module 11, an inner tube 13 on the inner wall of the outer sleeve 12, an annular side plate 14 on the outer wall of the inner tube 13, an end cap 15 on the outer wall of the inner tube 13 away from the end where the light source module 11 is located, a first electric push rod 16 on the side wall of the annular side plate 14 located on one side of the inner tube 13, a laser rangefinder 17 on the side wall of the annular side plate 14 located on the other side of the inner tube 13, and a second electric push rod 18 fixedly mounted on the outer wall of the outer sleeve 12.

[0014] The sliding limiting method between the outer sleeve 12 and the inner tube 13 and the sliding limiting method between the inner tube 13 and the end cap 15 both adopt linear sliding grooves; among them, the outer sleeve 12 is located on both sides, and the end cap 15 is located at the top and bottom.

[0015] Lenses 19 are fixed to one end of both the inner cavity of the inner tube 13 and the end cap 15.

[0016] The first electric actuator 16 is connected to the side wall of the end cover 15.

[0017] The second electric actuator 18 is connected to the side wall of the annular side plate 14.

[0018] A reflector 151 is also provided on the other side of the end cap 15, and the reflector 151 and the laser range sensor 17 are located on the same axis.

[0019] It should be noted that this embodiment provides a telescopic nested LED vehicle light module dynamic focus adjustment device, which is suitable for scenarios such as automotive headlights and adaptive high beams. It achieves high-precision dynamic focus adjustment by coordinating the extension and retraction of the inner tube and the fine adjustment of the end cap through dual electric push rods and combining laser ranging feedback.

[0020] The mounting plate 10 is fixed to the vehicle body and serves as the base for the device.

[0021] The light source module 11 integrates LED chips and heat dissipation structure, is located at the bottom of the mounting plate, and emits a parallel beam of light.

[0022] The outer sleeve 12 is fixed to one end of the light source module, and the inner wall is provided with linear sliding grooves on both sides, which slide in conjunction with the inner tube 13.

[0023] The inner tube 13 has an annular side plate 14 on its outer wall, and a first lens 19 is fixed in the inner cavity; a sliding nested end cap 15 is on the other side of the outer wall.

[0024] The end cap 15 has a second lens 19 fixed at one end and a reflector 151 on the other side; it is connected to the inner tube 13 in the vertical direction through a linear sliding groove.

[0025] The first electric push rod 16 is fixed to the side wall of the annular side plate 14, and the actuating end is connected to the end cover 15, driving it to finely adjust the stroke ±5mm along the inner tube axis.

[0026] The second electric push rod 18 is fixed to the outer wall of the outer sleeve 12, and the actuating end is connected to the annular side plate 14, driving the inner tube 13 to extend and retract by 50-200mm.

[0027] The laser rangefinder 17 is fixed to the side wall of the annular side plate 14 and is coaxial with the reflector 151 to measure the displacement of the end cover in real time.

[0028] In this embodiment, the electric actuator parameters are set as follows: The first electric linear actuator is a miniature servo type with a thrust of 20N, a speed of 10mm / s, and an accuracy of ±0.05mm.

[0029] The second electric actuator is an 18-type ball screw, with a thrust of 200N, a speed of 50mm / s, and an accuracy of ±0.1mm.

[0030] The laser rangefinder sensor 17 has a range of 10mm, a resolution of 0.01mm, and a sampling frequency of 1kHz.

[0031] Lens 19 has a first convex lens with a focal length of 50mm and a second concave lens with a focal length of -30mm. The combination achieves an adjustable focal length range of 30-100mm.

[0032] The working principle of this utility model is as follows: This device achieves dynamic focus control through a two-stage adjustment mechanism. 1. Main adjustment for inner tube telescopic movement The control logic second electric push rod 18 drives the annular side plate 14, which in turn drives the inner tube 13 to extend and retract along the outer sleeve 12 axially, changing the distance between the two lenses and achieving coarse focus adjustment.

[0033] The feedback control laser rangefinder 17 measures the inner tube's extension and retraction distance in real time, transmits the data to the PLC controller, and dynamically corrects the push rod stroke after comparing it with the target focal length to eliminate backlash error.

[0034] 2. Fine-tuning of end caps The control logic uses the first electric push rod 16 to directly drive the end cover 15 to move slightly along the inner tube 13 axially, finely adjusting the position of the second lens and achieving focal length fine adjustment.

[0035] The feedback control laser rangefinder 17 synchronously measures the displacement of the end cap, and the PLC controls the speed and position of the push rod through the PID algorithm to ensure fine-tuning accuracy of ±0.02mm.

[0036] The light source module 11 emits a parallel beam of light, which is converged by the first lens 19 to form a light spot. The light spot is then diffused or focused by the second lens 19, and finally outputs a light pattern that matches the target focal length, such as a near beam tangent or a far beam focused beam.

[0037] The PLC controller integrates two PWM outputs to control electric actuators, one analog input to receive laser ranging signals, and one CAN communication interface to interact with the vehicle ECU.

[0038] The drive module uses a stepper motor driver, such as DM542, to control the first electric actuator, and a servo driver, such as MD200, to control the second electric actuator, thereby achieving closed-loop position control.

[0039] The power supply system is powered by 24V DC, with separate power supplies for the light source module, PLC, and driver to avoid interference.

[0040] After the PLC is powered on, it performs a self-test, reads the initial value of the laser rangefinder sensor 17, and calibrates the zero point.

[0041] The system receives target focal length commands, such as "focal length 60mm in low beam mode," from the vehicle's ECU via the CAN bus.

[0042] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model.

Claims

1. A telescopic nested LED vehicle light module dynamic focus adjustment device, comprising a mounting plate (10), characterized in that: The mounting plate (10) has a light source module (11) at the bottom. One end of the light source module (11) has an outer sleeve (12). The inner wall of the outer sleeve (12) has an inner tube (13). The outer wall of the inner tube (13) has an annular side plate (14). The outer wall of the inner tube (13) away from the end where the light source module (11) is located is fitted with an end cap (15). The side wall of the annular side plate (14) located on one side of the inner tube (13) has a first electric push rod (16). The side wall of the annular side plate (14) located on the other side of the inner tube (13) has a laser range sensor (17). The outer wall of the outer sleeve (12) is fixedly provided with a second electric push rod (18).

2. The telescopic nested LED vehicle light module dynamic focus adjustment device according to claim 1, characterized in that: The sliding limiting method between the outer sleeve (12) and the inner tube (13) and the sliding limiting method between the inner tube (13) and the end cap (15) both adopt linear sliding grooves; wherein, the outer sleeve (12) is located on both sides, and the end cap (15) is located on the top and bottom.

3. The telescopic nested LED vehicle light module dynamic focus adjustment device according to claim 1, characterized in that: A lens (19) is fixed to one end of both the inner cavity of the inner tube (13) and the end cap (15).

4. The telescopic nested LED vehicle light module dynamic focus adjustment device according to claim 1, characterized in that: The first electric push rod (16) is connected to the side wall of the end cap (15).

5. The telescopic nested LED vehicle light module dynamic focus adjustment device according to claim 1, characterized in that: The actuating end of the second electric push rod (18) is connected to the side wall of the annular side plate (14).

6. The telescopic nested LED vehicle light module dynamic focus adjustment device according to claim 1, characterized in that: A reflector (151) is also provided on the other side of the end cap (15), and the reflector (151) and the laser rangefinder (17) are located on the same axis.

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