Low beam lens structure, low beam module assembly and vehicle

Abstract

The present invention discloses a low beam lens structure, a low beam module assembly and a vehicle. The low beam lens structure includes a light condensing portion, a projection portion and a connecting portion. The light condensing portion is configured to direct the light emitted by a light source towards the projection portion. The projection portion is configured to refract the light and project the light to the outside. The connecting portion includes a light channel and a cut-off line forming unit. The light channel is disposed between the light condensing portion and the projection portion to allow the light to pass through. The cut-off line forming unit is configured to cause the light projected to the outside through the projection portion to generate a cut-off line. Wherein, the light condensing portion, the projection portion and the connecting portion are integrally formed structures. The low beam lens structure of the present invention can effectively improve the assembly accuracy, and at the same time can greatly improve the light energy utilization efficiency, and effectively solve the chromatic dispersion problem near the cut-off line.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle low beam lights, and particularly to a low beam lens structure, a low beam module assembly and a vehicle. Background Art

[0002] At present, the low beam lights of vehicles generally adopt single - light lenses or double - light lenses. Among them, single - light lenses mostly adopt the combination of a high - temperature PC reflector, a PMMA outer lens and a fixed baffle, or the combination of a PC condensing inner lens and a PMMA outer lens; double - light lenses mostly adopt the combination of a high - temperature PC reflector, a PMMA outer lens and a movable baffle, or the combination of a PC condensing inner lens, a PMMA outer lens and a fixed baffle.

[0003] The above - mentioned optical solutions of single - light lenses and double - light lenses are typically divided into direct - projection lens solutions and side - projection mirror solutions. The principle is to use a condensing inner lens or a reflector to converge the light of the light source, use a fixed baffle or a movable baffle to block out a light pattern with a cut - off line between light and dark, and then project the light pattern through the lens.

[0004] However, the problems existing in the prior art are that, whether it is a single - light lens solution or a double - light lens solution, the module assembly occupies a large space, and the requirement for assembly accuracy is very high. In addition, the double - light lens with a movable baffle has a high cost, generates noise during the switching between high beam and low beam, the movable baffle occupies a large space, resulting in a large lens size, and there is light efficiency loss in the low beam mode; while the double - light lens with a fixed baffle has a dark line when the high beam and low beam are superimposed, there is a color - blooming phenomenon at the cut - off line between light and dark, and the baffle is prone to deformation and wear after long - term use; for the low beam lenses in the form of two or more single - low - beam combinations, since the light pattern and brightness of each lens are basically the same, the combined low beam often shows a stratification phenomenon, with poor lighting effect and affecting visual perception. Summary of the Invention

[0005] The purpose of the present invention is to overcome the problems existing in the prior art, and provide a low beam lens structure which can effectively improve the assembly accuracy, and at the same time can greatly improve the light energy utilization efficiency, and effectively solve the chromatic dispersion problem near the cut - off line between light and dark.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a low-beam lens structure, which includes a focusing portion, a projection portion and a connecting portion; the focusing portion is configured to be able to direct the light emitted by a light source to the projection portion; the projection portion is configured to be able to refract the light and project the light to the outside world; the connecting portion includes a light channel and a light-dark cutoff line forming unit, the light channel is arranged between the focusing portion and the projection portion to allow the light to pass through, and the light-dark cutoff line forming unit is configured to be able to generate a light-dark cutoff line for the light projected to the outside world through the projection portion; wherein the focusing portion, the projection portion and the connecting portion are an integrally formed structure.

[0007] Optionally, the inner wall of the connecting portion is a total reflection surface.

[0008] Optionally, the light channel includes a first section and a second section, the first section is connected to the focusing part, and the second section is connected to the projection part; wherein a height of a longitudinal section of the first section is smaller than a height of a longitudinal section of the second section so that a step surface serving as the light-dark cutoff line forming unit is formed at a connection between the first section and the second section; wherein the first section is extended along a first direction, and the second section is extended along a second direction, and an angle θ between the first direction and the second direction is greater than 0°, so that the light-dark cutoff line forming unit can reflect the light emitted from the focusing part to the projection part, and cause the light to be refracted by the projection part to form a light d that is deflected downward, and the light d that is deflected downward and the light u that is deflected upward after being refracted by the projection part form a light-dark cutoff line at a preset distance.

[0009] Optionally, a height of the cut-off line forming unit is higher than a height of a center line of the projection portion.

[0010] Optionally, the height of the lowest point of the reflective surface of the light focusing portion is consistent with the height of the bright-dark cut-off line forming unit.

[0011] Optionally, a groove is provided at one end of the first section close to the second section.

[0012] Optionally, the relationship among the focusing angle θu of the upper half of the focusing portion, the focusing angle θd of the lower half of the focusing portion, the maximum light receiving angle θr of the projection portion and the included angle θ is: θ=θd=θu=θr / 2.

[0013] Compared with the prior art, the low beam lens structure of the present invention has the following advantages:

[0014] Through the above technical solution, the focusing part can reflect the light emitted by the light source to the projection part, the projection part can refract the light and project the light to the outside, the light channel of the connecting part is arranged between the focusing part and the projection part to allow the light to pass through, and the light-dark cutoff line forming unit of the connecting part can make the light projected to the outside produce a light-dark cutoff line, therefore, the light emitted by the light source passes through the light channel after being reflected by the focusing part, and is refracted by the projection part and projected to the outside, and the light-dark cutoff line forming unit enables the low beam lens structure of the present invention to realize the low beam lighting form with a low beam light-dark cutoff line. In the prior art, the focusing module and the projection module of the low beam lens structure adopt a separate design, and the optical system corresponding to this design form is complex and requires at least three components, so it has extremely high requirements on the installation accuracy of the low beam lens structure, resulting in insufficient installation accuracy. To solve this problem, the present invention adopts an integrated molding structure for the focusing part, the projection part and the connecting part. Since the low beam lens structure of the present invention adopts integrated injection molding, there is no problem of installation and positioning between the focusing part, the projection part and the connecting part, thereby improving the assembly accuracy.

[0015] The present invention also provides a low beam module assembly, which includes a heat sink, a light board and the above-mentioned low beam lens structure; the heat sink is fixedly arranged, the light board is installed on the heat sink, and the light source of the light board is located in the focusing part of the low beam lens structure.

[0016] Optionally, the low beam module assembly includes a shading component, and the shading component cover is arranged on the outside of the connecting portion of the low beam lens structure.

[0017] The present invention also provides a vehicle, comprising the above-mentioned low beam module assembly.

[0018] The advantages of the low beam module assembly, the vehicle and the low beam lens structure described above compared to the prior art are the same and will not be elaborated herein.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural schematic diagram of an implementation mode of a low beam lens structure of the present invention;

[0021] Figure 2 yes Figure 1 Bottom view of

[0022] Figure 3 is a schematic diagram of a longitudinal section of a low beam lens structure of the present invention;

[0023] Figure 4 Schematic diagram of the focusing angle and the light receiving angle of the low beam lens structure of the present invention, wherein the angle θ is 0°;

[0024] Figure 5 Schematic diagram of the focusing angle and the light receiving angle of the low beam lens structure of the present invention, wherein the angle θ>0°;

[0025] Figure 6 is a schematic diagram of the light utilization efficiency of the low beam lens structure of the present invention, wherein the angle θ is 0°;

[0026] Figure 7 is a schematic diagram of the light utilization efficiency of the low beam lens structure of the present invention, wherein the angle θ>0°;

[0027] Figure 8 Schematic diagram of the dispersion problem of the bright and dark cutoff lines of the low beam lens structure of the present invention, wherein the angle θ is 0°;

[0028] Fig. 9 is a schematic diagram of the dispersion problem of the bright and dark cutoff lines of the low beam lens structure of the present invention, wherein the angle θ>0°;

[0029] Fig.10 It is a structural schematic diagram of an implementation mode of the low beam module assembly of the present invention.

[0030] Description of Reference Numerals

[0031] 10-light focusing part, 20-projection part, 30-connection part, 31-first section, 32-second section, 33-light-dark cut-off line forming unit, 34-groove, 100-low beam lens structure, 200-heat sink, 300-light board, 400-light shielding component DETAILED DESCRIPTION

[0032] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0033] In the prior art, the focusing module and the projection module of the low beam lens structure are designed separately. The optical system corresponding to this design is complex and requires at least three parts. Therefore, it requires extremely high installation accuracy of the low beam lens structure. To solve this problem, the present invention provides a low beam lens structure.

[0034] like Figures 1 to 4As shown, the low beam lens structure of the present invention includes a focusing portion 10, a projection portion 20 and a connecting portion 30; the focusing portion 10 is configured to reflect the light emitted by the light source toward the projection portion 20; the projection portion 20 is configured to refract the light and project the light to the outside; the connecting portion 30 includes a light channel and a light-dark cutoff line forming unit 33, the light channel is arranged between the focusing portion 10 and the projection portion 20 to allow the light to pass through, and the light-dark cutoff line forming unit 33 is configured to generate a light-dark cutoff line for the light projected to the outside; wherein the focusing portion 10, the projection portion 20 and the connecting portion 30 are an integrally formed structure.

[0035] In the present invention, the focusing portion 10, the projection portion 20 and the connecting portion 30 adopt an integrally formed structure. Since the low beam lens structure of the present invention adopts an integral injection molding, there is no problem of installation and positioning between the focusing portion 10, the projection portion 20 and the connecting portion 30, thereby improving the assembly accuracy.

[0036] In order to maximize the utilization of light efficiency and reduce light waste, in one embodiment of the present invention, the inner wall of the connecting portion 30 is designed to be a total reflection surface.

[0037] It should be understood that the cut-off line forming unit 33 can be designed in various forms as long as it can block a portion of the light passing through the light channel. In one embodiment of the present invention, the light channel includes a first section 31 and a second section 32, the first section 31 is connected to the focusing portion 10, and the second section 32 is connected to the projection portion 20; wherein the height of the longitudinal section of the first section 31 is less than the height of the longitudinal section of the second section 32 so that the connection between the first section 31 and the second section 32 forms a step surface serving as the cut-off line forming unit 33.

[0038] The advantage of the above embodiment is that, since the cut-off line forming unit 33 and the light channel are integrally formed, the difficulty of injection molding of the connecting portion is reduced, and the overall structure is also simplified.

[0039] In order to optimize the glare problem of the 50L regulation point, optionally, a groove 34 is provided at one end of the first section 31 close to the second section 32 .

[0040] In some embodiments of the present invention, although the problem of insufficient assembly precision is solved, there is still the problem of poor light utilization efficiency, which leads to poor lighting effect and affects visual perception. This is because most of the light emitted by the light source is not effectively projected from the projection unit 20. Figure 6For example, the first section 31 and the second section 32 are both arranged to extend in the horizontal direction, that is, the included angle θ between the first section 31 and the second section 32 is 0°. Moreover, the width of the longitudinal section of the first section 31 is consistent with the width of the part above the center line of the light condensing part 10, and the first section 31 is connected to the part above the center line of the light condensing part 10. This enables only the light rays of the part above the center line of the light condensing part 10 to pass through the first section 31 and reach the projection part 20 to become the effective light source, while the light rays emitted from the part below the center line of the light condensing part 10 will scatter outwards from the first section 31 and thus cannot reach the projection part 20 for projection, ultimately resulting in a huge waste of light energy.

[0041] In order to effectively improve the light energy utilization efficiency, in an embodiment of the present invention, as Figure 7 shown, the first section 31 is arranged to extend in the first direction, the second section 32 is arranged to extend in the second direction, and the included angle θ between the first direction and the second direction is θ>0°, so that the light and dark cut-off line forming unit 33 can reflect the light rays emitted from the light condensing part 10 to the projection part 20, and after the light rays are refracted by the projection part 20, a downwardly deflected light ray d is formed. The downwardly deflected light ray d and the upwardly deflected light ray u passing through the projection part 20 form a light and dark cut-off line at a preset distance. That is to say, the first section 31 and the second section 32 are arranged at a certain inclination angle. A part of the light rays emitted by the light source directly reach the projection part 20 through the first section 31 and are refracted out, and another part of the light rays are totally reflected by the inner wall of the total reflection surface of the first section 31 and then reach the projection part 20 and are refracted out, thereby realizing a low beam illumination form with a light and dark cut-off line. Under the condition of ensuring a uniform and gradual change of the low beam gradient, the effective area of the light condensing part 10 will be increased to more than 90%, greatly improving the light energy utilization efficiency.

[0042] Designing the included angle θ between the first section 31 and the second section 32 to be greater than 0° can not only improve the light energy utilization efficiency, but also effectively solve the problems of color blooming and stratification phenomena existing at the light and dark cut-off line. For Figure 8 example, in this embodiment, the included angle θ between the first section 31 and the second section 32 is 0°, and the effective area of the light condensing part 10 is only 50%. The light rays of this part are refracted by the projection part 20. Since the refractive indices of light rays with different wavelengths are different, color blooming phenomena appear at the light and dark cut-off line.

[0043] When the included angle θ between the first section 31 and the second section 32 is θ>0°, for example, when the included angle θ = 10°, as Fig. 9As shown, the light and dark cut-off line forming unit 33 can reflect the light emitted from the light condensing part 10 to the projection part 20, and make the light form a downwardly deflected light d after being refracted by the projection part 20. The downwardly deflected light d and the upwardly deflected light u passing through the projection part 20 form a light and dark cut-off line at a preset distance. That is to say, half of the light forming the light and dark cut-off line comes from the direct reflected light of the light condensing part 10 (i.e., the upwardly deflected light u), and the other half of the light forming the light and dark cut-off line comes from the light reflected by the inner wall of the total reflection surface of the first section 31 to the projection part 20 (i.e., the downwardly deflected light d). According to the principle of the triangular prism, the dispersion of the upwardly deflected light u is from red light to violet light, and the dispersion of the downwardly deflected light d is from violet light to red light. Combining with the principle of complementary light colors of the color ring, the blue light formed by the dispersion in the upper half near the light and dark cut-off line and the yellow light formed by the dispersion in the lower half will be mixed and superimposed. The synthesized white light formed after the superposition is equivalent to white light. Macroscopically, countless dispersed light rays near the light and dark cut-off line are continuously mixed and superimposed, so as to show a clearly defined cut-off line without obvious other colored scattered light at a preset distance (for example, on the light distribution screen at 25 m), effectively solving the dispersion problem near the light and dark cut-off line.

[0044] Specifically, the height of the light and dark cut-off line forming unit (33) is higher than the height of the center line of the projection part (20). Of course, the relationship between the height of the light and dark cut-off line forming unit (33) and the height of the center line of the projection part (20) should meet the requirements of industry specifications.

[0045] In addition, the height of the lowest point of the reflecting surface of the light condensing part (10) is the same as the height of the light and dark cut-off line forming unit (33). This can make the utilization rate of the light emitted from the light condensing part (10) reach the highest.

[0046] From Figures 6 to 9 it can be seen that by setting an angle between the first section 31 and the second section 32, that is, when the included angle θ > 0°, not only can the light utilization efficiency be improved, but also the problems of color blooming and layering at the light and dark cut-off line can be solved. In addition, in the present invention, the one-piece injection molding of the low beam lens structure can further improve the light utilization efficiency and effectively solve the dispersion problem near the light and dark cut-off line.

[0047] Figure 4 and Figure 5 further explains how the light condensing efficiency and light collecting efficiency of the low beam lens structure of the present invention are affected by the included angle θ. In Figure 4 and Figure 5In the figure, F1 is the luminous center of the light source, F2 is the focus of the projection part 20, f1 is the focal length from the luminous center of the light source to the focus of the projection part 20, f2 is the focal length from the focus of the projection part 20 to the projection surface of the projection part 20, h is the distance from the edge of the total reflection surface of the focusing part 10 to the luminous center of the light source, z is the size of the light outlet of the projection part 20, θu and θd are the effective focusing angles of the focusing part 10, θr is the maximum light receiving angle of the lower half of the projection part 20, and θn is the effective light receiving angle of the lower half of the projection part 20.

[0048] It should be understood that the angle θ can be designed to be different values. In order to achieve the highest focusing efficiency and maximize the light utilization efficiency, in one embodiment of the present invention, the focusing angle θu of the upper half of the focusing portion 10, the focusing angle θd of the lower half of the focusing portion 10, the maximum light receiving angle θr of the projection portion 20 and the angle θ are related as follows: θ=θd=θu=θr / 2. At this time, both the focusing efficiency and the light receiving efficiency reach the maximum value, the light efficiency utilization rate of the entire optical system is the highest, and the colorization problem and stratification problem at the light and dark cutoff line are also solved.

[0049] When the angle θ>0°, the effective focusing angles of the focusing portion 10 are θu and θd, the effective utilization rate of the light emitted by the light source will change according to the change of θd, and the maximum light receiving angle θr of the projection portion 20 is equal to the effective light receiving angle. Therefore, when the angle θ=the focusing angle θd of the lower half of the focusing portion 10=the focusing angle θu of the upper half of the focusing portion 10=the maximum light receiving angle θr / 2 of the projection portion 20, the focusing efficiency is maximum.

[0050] When the angle θ=the focusing angle θd of the lower half of the focusing part 10<the focusing angle θu of the upper half of the focusing part 10, the effective focusing angle of the lower half of the focusing part 10 becomes smaller, and the focusing efficiency is reduced. When the angle θ>the focusing angle θd of the lower half of the focusing part 10=the focusing angle θu of the upper half of the focusing part 10, the maximum light receiving angle θr of the projection part 20>the effective light receiving angle, and the light receiving efficiency is reduced.

[0051] like Fig.10 As shown, the present invention also provides a low beam module assembly, which includes a heat sink 200, a light board 300 and the above-mentioned low beam lens structure 100; the heat sink 200 is fixedly arranged, the light board 300 is installed on the heat sink 200, and the light source of the light board 300 is located in the focusing portion 10 of the low beam lens structure 100.

[0052] In order to absorb or block the stray light projected from the side wall of the light channel, in an embodiment of the present invention, the low beam module assembly includes a light shielding component 400, and the light shielding component 400 is sleeved outside the connecting portion 30 of the low beam lens structure 100.

[0053] The present invention also provides a vehicle, and the vehicle includes the above-mentioned low beam module assembly.

[0054] The advantages of the low beam module assembly, the vehicle and the above-mentioned low beam lens structure relative to the prior art are the same, and will not be elaborated here.

[0055] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention. To avoid unnecessary repetition, the present invention will not separately describe various possible combinations. But these simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A low beam lens structure, characterized in that, The low beam lens structure includes a light condensing part (10), a projection part (20), and a connecting part (30); The light condensing part (10) is configured to direct the light emitted by the light source towards the projection part (20); The projection part (20) is configured to refract the light and project the light to the outside; The connecting part (30) includes a light channel and a cut-off line forming unit (33). The light channel is arranged between the light condensing part (10) and the projection part (20) to allow the light to pass through. The cut-off line forming unit (33) is configured to cause a cut-off line to be generated in the light projected to the outside through the projection part (20); Wherein, the light condensing part (10), the projection part (20), and the connecting part (30) are of an integrally formed structure; The light channel includes a first section (31) and a second section (32). The first section (31) is connected to the light condensing part (10), and the second section (32) is connected to the projection part (20). Wherein, the height of the longitudinal section of the first section (31) is less than the height of the longitudinal section of the second section (32) so that a stepped surface serving as the cut-off line forming unit (33) is formed at the connection of the first section (31) and the second section (32); Wherein, the first section (31) extends along a first direction, and the second section (32) extends along a second direction. The included angle θ between the first direction and the second direction is greater than 0°, so that the cut-off line forming unit (33) can reflect the light emitted from the light condensing part (10) to the projection part (20), and the light forms a downwardly deflected light d after being refracted by the projection part (20). The downwardly deflected light d and the upwardly deflected light u passing through the projection part (20) form a cut-off line at a preset distance. The downwardly deflected light d and the upwardly deflected light u can complement each other and overlap with each other so that there is no chromatic dispersion near the cut-off line; The height of the cut-off line forming unit (33) is higher than the height of the center line of the projection part (20); The height of the lowest point of the reflecting surface of the light condensing part (10) is the same as the height of the cut-off line forming unit (33).

2. The low beam lens structure according to claim 1, wherein, The inner wall of the connecting part (30) is a total reflection surface.

3. The low beam lens structure according to claim 1, characterized in that, A groove (34) is provided at one end of the first section (31) close to the second section (32).

4. The low beam lens structure according to claim 1, characterized in that, The relationship among the light condensing angle θu of the upper half of the light condensing part (10), the light condensing angle θd of the lower half of the light condensing part (10), the maximum light receiving angle θr of the projection part (20), and the included angle θ is: θ = θd = θu = θr / 2.

5. A low beam module assembly, characterized in that, The low beam module assembly includes a radiator (200), a lamp board (300), and the low beam lens structure (100) according to any one of claims 1-4; The radiator (200) is fixedly arranged, the lamp board (300) is installed on the radiator (200), and the light source of the lamp board (300) is located in the light condensing part (10) of the low beam lens structure (100).

6. The low beam module assembly according to claim 5, wherein, The low beam module assembly includes a light shielding component (400), and the light shielding component (400) is sleeved outside the connecting part (30) of the low beam lens structure (100).

7. A vehicle, characterized in that, The vehicle includes the low beam module assembly according to claim 5 or 6.

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