Low beam lens, low beam module and vehicle

Abstract

The invention belongs to the technical field of automobile lamps, and particularly relates to a low-beam lens, a low-beam module and a vehicle. The low-beam lens is a total-reflection lens and is of an integrated structure, condensation structures used for being in one-to-one correspondence with the LED lamp beads are arranged on the low-beam lens, the low-beam lens is further provided with a light and shade cut-off line forming face located below the condensation structures, a light shading part is arranged on the low-beam lens and below the light and shade cut-off line forming face, and a light emitting area is formed in the low-beam lens and above the light shading part. The end face, away from the condensation structure, of the low-beam lens forms a light-emitting convex face. The low-beam module comprises a chuck, a plurality of LED lamp beads, a circuit board, a radiator and the low-beam lens which are assembled together. The vehicle comprises a vehicle body, and the vehicle body is provided with the low beam module. The LED lamp is simple in structure, small in size, high in reliability and capable of achieving lossless installation, the advantages of an LED can be reserved, and the requirements of laws and regulations for light patterns and light and shade cut-off lines can be met.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile lamps, and in particular relates to a low-beam lens, a low-beam module and a vehicle. Background Art

[0002] Currently, most vehicles use halogen lamps for their low-beam headlights. Halogen lamps are tungsten lamps filled with halogen elements or halides such as bromine and iodine. They offer excellent optical compatibility, a cutoff line generation mechanism, high thermal stability, and standardized interfaces. Existing halogen lamps primarily consist of a lens, a sunshade, an elliptical reflector, and a filament. The sunshade is located at the focal point of the lens, and the filament is located within the elliptical reflector. The light-emitting surface of the lens is typically 60mm by 60mm. The 360° spherical emission characteristics of the halogen filament are well-suited to the focusing requirements of the elliptical reflector. The filament can be sized to resemble a point source, ensuring a precise optical path after reflection from the reflector. The sunshade physically blocks the lower half of the filament, which, in conjunction with the lens, creates a light cutoff line that complies with regulations. Halogen lamps maintain stability even at high operating temperatures, eliminating the need for additional heat dissipation. Interface standards such as H4 and H7 are globally accepted, resulting in low per-lamp costs.

[0003] Despite the aforementioned advantages of halogen lamps, which made them the primary source of low-beam headlights in the early days, they still suffer from numerous drawbacks, such as low luminous flux, high energy consumption, short lifespan, and numerous components. Technological advancements have led to the emergence of LEDs, a new, energy-efficient light source with advantages such as low energy consumption, long lifespan, and high luminous efficacy. LEDs offer significantly higher luminous efficiency than halogen lamps, with an effective lifespan of 30,000 to 50,000 hours, far exceeding the lifespan of halogen lamps. As technology advances, an increasing number of vehicles are using LEDs as core lighting components. Consequently, drivers of vehicles equipped with halogen lamps are seeking to replace them with LEDs.

[0004] However, the optical systems of LED and halogen lamps exhibit inherent contradictions, primarily in the following areas: 1. The directional emission characteristics of LED lamps and the size of the surface light source result in ineffective reflections from nearly half of the original vehicle's reflector, causing diffuse light spots. 2. The original design, designed for a specific location on the halogen filament, results in cutoff distortion and upward glare due to the increased thickness of the LED COB package and the shifted emission center, directly violating the regulatory constraints on cutoff accuracy and glare intensity. 3. The required heat dissipation module for LED lamps doubles its volume, squeezing the space in the lamp cavity and forcing the mounting position to be raised, further deviating from the optical focus. Due to these contradictions, it is difficult to meet current regulations for low-beam headlights by simply replacing the LED lamp. Therefore, it is necessary to disassemble the original vehicle's low-beam headlight components, such as the reflector, and replace them with a set of optical system components compatible with the LED lamp. Existing LED modules, consisting of LED beads, lenses, light shields, heat sinks, brackets, and other components, are numerous and cumbersome to replace. Therefore, how to replace the original halogen lamp with a simpler LED module while still meeting regulatory requirements has become a pressing issue. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a low beam lens to solve the technical problems that the existing LED module has many components, is complicated to install when replacing the original vehicle halogen lamp, and is difficult to meet the legal requirements for low beam lamps; the purpose of the present invention is also to provide a low beam module that is easy to replace the original vehicle halogen lamp and can meet the legal requirements for low beam lamps; the purpose of the present invention is also to provide a vehicle using the above-mentioned low beam module.

[0006] To solve the above problems, the present invention provides a low beam lens adopting the following technical solutions: A low beam lens is a fully reflective lens with an integrated structure. It has a focusing structure for corresponding one-to-one with LED lamp beads, and a light-cutoff line forming surface located below the focusing structure. The low beam lens has a light shielding portion below the light-cutoff line forming surface. A light emitting area is formed in the low beam lens above the light shielding portion. The end face of the low beam lens away from the focusing structure forms a light emitting convex surface. The beneficial effects of the low beam lens of the present invention are as follows: the low beam lens of the present invention is an integrated structure, which integrates the functions of the focusing component, the shading plate and the lens in the traditional LED module, solves the problem that the existing LED module has many components and complicated installation, simplifies the structure of the LED module, and has a small volume; the low beam lens is a total reflection lens, which can efficiently utilize the directional light-emitting characteristics of the LED and reduce light loss; the light and dark cutoff line forming surface cooperates with the shading part to replace the function of the original vehicle shading plate, ensuring compliance with the legal requirements for cutoff line accuracy and glare intensity; the low beam lens of the present invention itself can form an independent and complete optical system, and when replacing it, it is only necessary to remove the original vehicle's halogen bulb without removing the original vehicle's reflective bowl and shading plate, and the installation is very convenient; when working, lighting can be performed without the help of the original vehicle's reflective bowl and shading plate.

[0007] Furthermore, the focusing structure is a total reflection focusing cup.

[0008] Beneficial effects: The total reflection focusing cup uses the principle of total reflection to reduce light loss, accurately focusing light based on the directional light-emitting characteristics of LEDs, solving the problem of low reflection efficiency of traditional reflective bowls for LED light, reducing the loss of light source energy efficiency, and improving light efficiency; in addition, the structural design of the focusing cup can specifically constrain the light distribution of the LED surface light source, avoid light spot diffusion, and make the light more concentrated to meet the lighting intensity requirements of the low beam; furthermore, the focusing cup design does not require a very long light channel to extend, which can reduce the length of the low beam lens and thus reduce the volume of the low beam lens.

[0009] Furthermore, there are three light-focusing structures, each of which is provided with a groove, the inner wall surfaces of each groove are curved surfaces, the opening of each groove is used to face the corresponding LED lamp bead, and each groove is provided with a convex structure convex toward the corresponding LED lamp bead; the light incident end of the low beam lens is defined as its front end, and the light emitting end of the low beam lens is defined as its rear end, and the three light-focusing structures are respectively a left-side light-focusing structure, a right-side light-focusing structure and a middle light-focusing structure, and the left-side light-focusing structure and the right-side light-focusing structure are symmetrically distributed about the middle light-focusing structure.

[0010] Beneficial effects: The three focusing structures can correspond to three LED lamp beads, expanding the lighting coverage. The left-right symmetrical design of the focusing structure can ensure uniform lighting on both sides, avoiding insufficient or excessive brightness on one side; the curved inner wall of the groove and the internal convex structure can optimize the refraction and reflection path of light, making the light more concentrated and reducing light dispersion.

[0011] Furthermore, the light-dark cut-off line molding surface includes a first molding surface, a second molding surface and a molding slope connecting the first molding surface and the second molding surface, and the height of the first molding surface is higher than the height of the second molding surface; the first molding surface, the second molding surface and the molding slope all extend from the position of the shading portion to the end of the focusing structure, and the focus of the low beam lens is at the intersection of the first molding surface and the molding slope.

[0012] Beneficial effect: The height difference between the first and second molding surfaces cooperates with the inclined surface to form a stepped structure with one side higher and the other side lower, which can form a light-dark cutoff line that complies with regulations; the focus is located at the intersection of the first molding surface and the molding inclined surface, ensuring that light transitions accurately at the light-dark cutoff line, avoiding glare caused by upward scattering of light, and meeting the regulatory constraints on glare intensity.

[0013] Furthermore, the shading portion is a curved surface.

[0014] Beneficial effect: Keep the image of the low beam lens straight and avoid image warping.

[0015] Furthermore, the projection area of ​​the light-emitting convex surface in the front-to-back direction is 20 mm*20 mm.

[0016] Beneficial effects: Compared with traditional halogen lamps, the size of the light-emitting convex surface is greatly reduced, which greatly reduces the volume of the entire low-beam lens. The small-size light-emitting convex surface combined with the total reflection structure can accurately control the light emission angle and range. Under the condition of the same light source luminous flux, the lighting effect of traditional large-size halogen lamps can be achieved.

[0017] Furthermore, the low beam lens is integrally injection-molded using PC material or PMMA material.

[0018] Benefits: One-piece injection molding ensures the structural integrity of the low-beam lens, reducing the errors associated with the assembly of multiple components in traditional LED modules, improving optical precision, and lowering production complexity and costs, making it suitable for mass production. Furthermore, the excellent light transmittance, high-temperature resistance, and impact resistance of PC and PMMA materials ensure stable optical performance over long-term use.

[0019] The present invention provides a technical solution for a low beam module: A low beam module includes a chuck, multiple LED lamp beads, a circuit board, a heat sink and a low beam lens assembled together. The low beam lens is a total reflection lens and has an integrated structure. It has a focusing structure corresponding to the LED lamp beads one by one, and also has a light cutoff line forming surface located below the focusing structure. The low beam lens has a light shielding portion below the light cutoff line forming surface. The area above the light shielding portion in the low beam lens forms a light emitting area. The end face of the low beam lens away from the focusing structure forms a light emitting convex surface.

[0020] The beneficial effects of the low-beam module of the present invention are as follows: the low-beam module integrates the functions of efficient focusing, precise light control, and heat dissipation. The low-beam lens in the low-beam module is an integrated structure that integrates the functions of the focusing component, visor, and lens in a traditional LED module, forming a complete optical system. This reduces the number of components in the low-beam module of the present invention, with the low-beam lens being the only optical component. The overall structure is simple, reliable, and has a long service life. When modifying a halogen lamp, non-destructive installation can be achieved. The low-beam module of the present invention can be installed by simply removing the original vehicle's halogen bulb without removing other optical components. The low-beam lens is a fully reflective lens, which enables the low-beam module of the present invention to efficiently utilize the directional light-emitting characteristics of the LED, reducing light loss, and the emitted light spot has a clear light-dark cutoff line, ensuring compliance with regulatory requirements for cutoff line accuracy and glare intensity.

[0021] Furthermore, the focusing structure is a total reflection focusing cup.

[0022] Beneficial effects: The total reflection focusing cup uses the principle of total reflection to reduce light loss, accurately focusing light based on the directional light-emitting characteristics of LEDs, solving the problem of low reflection efficiency of traditional reflective bowls for LED light, reducing the loss of light source energy efficiency, and improving light efficiency; in addition, the structural design of the focusing cup can specifically constrain the light distribution of the LED surface light source, avoid light spot diffusion, and make the light more concentrated to meet the lighting intensity requirements of the low beam; furthermore, the focusing cup design does not require a very long light channel to extend, which can reduce the length of the low beam lens and thus reduce the volume of the low beam lens.

[0023] Furthermore, there are three light-focusing structures, each of which is provided with a groove, the inner wall surfaces of each groove are curved surfaces, the opening of each groove is used to face the corresponding LED lamp bead, and each groove is provided with a convex structure convex toward the corresponding LED lamp bead; the light incident end of the low beam lens is defined as its front end, and the light emitting end of the low beam lens is defined as its rear end, and the three light-focusing structures are respectively a left-side light-focusing structure, a right-side light-focusing structure and a middle light-focusing structure, and the left-side light-focusing structure and the right-side light-focusing structure are symmetrically distributed about the middle light-focusing structure.

[0024] Beneficial effects: The three focusing structures can correspond to three LED lamp beads, expanding the lighting coverage. The left-right symmetrical design of the focusing structure can ensure uniform lighting on both sides, avoiding insufficient or excessive brightness on one side; the curved inner wall of the groove and the internal convex structure can optimize the refraction and reflection path of light, making the light more concentrated and reducing light dispersion.

[0025] Furthermore, the light-dark cut-off line molding surface includes a first molding surface, a second molding surface and a molding slope connecting the first molding surface and the second molding surface, and the height of the first molding surface is higher than the height of the second molding surface; the first molding surface, the second molding surface and the molding slope all extend from the position of the shading portion to the end of the focusing structure, and the focus of the low beam lens is at the intersection of the first molding surface and the molding slope.

[0026] Beneficial effect: The height difference between the first and second molding surfaces cooperates with the inclined surface to form a stepped structure with one side higher and the other side lower, which can form a light-dark cutoff line that complies with regulations; the focus is located at the intersection of the first molding surface and the molding inclined surface, ensuring that light transitions accurately at the light-dark cutoff line, avoiding glare caused by upward scattering of light, and meeting the regulatory constraints on glare intensity.

[0027] Furthermore, the shading portion is a curved surface.

[0028] Beneficial effect: Keep the image of the low beam lens straight and avoid image warping.

[0029] Furthermore, the projection area of ​​the light-emitting convex surface in the front-to-back direction is 20 mm*20 mm.

[0030] Beneficial effects: Compared with traditional halogen lamps, the size of the light-emitting convex surface is greatly reduced, which greatly reduces the volume of the entire low-beam lens. The small-size light-emitting convex surface combined with the total reflection structure can accurately control the light emission angle and range. Under the condition of the same light source luminous flux, the lighting effect of traditional large-size halogen lamps can be achieved.

[0031] Furthermore, the low beam lens is integrally injection-molded using PC material or PMMA material.

[0032] Benefits: One-piece injection molding ensures the structural integrity of the low-beam lens, reducing the errors associated with the assembly of multiple components in traditional LED modules, improving optical precision, and lowering production complexity and costs, making it suitable for mass production. Furthermore, the excellent light transmittance, high-temperature resistance, and impact resistance of PC and PMMA materials ensure stable optical performance over long-term use.

[0033] Furthermore, the chuck is an H7 chuck, an H4 chuck, an HB3 chuck or a turn signal bulb holder, and the distance between the chuck and the light-emitting convex surface of the low-beam lens is equal to the length of the bulb to be replaced.

[0034] Beneficial effects: The H7 chuck, H4 chuck, HB3 chuck or turn bulb chuck is a globally accepted halogen lamp interface standard, ensuring that the low beam module can be directly adapted to the corresponding model of the original vehicle's lamp holder without the need for additional interface modification; the distance between the chuck and the light-emitting convex surface of the low beam lens matches the length of the bulb, ensuring that the installation position of the low beam module is consistent with the optical focus of the original vehicle's halogen lamp, avoiding optical path deviation and light pattern distortion caused by installation position offset, and further improving compliance after replacement.

[0035] The technical solution of a vehicle provided by the present invention is: A vehicle includes a vehicle body, on which a low beam module is mounted. The structure of the low beam module is the same as that in the above-mentioned technical solution of the low beam module, and will not be described in detail here.

[0036] The beneficial effects of the vehicle of the present invention are: the vehicle can obtain the low energy consumption, long life and high light efficiency advantages of LED, while the lighting light pattern complies with regulations, reduces the risk of glare, and improves driving safety; it is compatible with the installation structure of the original vehicle halogen lamp and is suitable for upgrading various models equipped with standard interface halogen lamps such as H7, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the three-dimensional structure of the low beam lens of the present invention Figure 1 ; Figure 2 Schematic diagram of the three-dimensional structure of the low beam lens of the present invention Figure 2 ; Figure 3 for Figure 1 The main view; Figure 4 for Figure 1 Side view of Figure 5 for Figure 1 Bottom view of Figure 6 is a schematic diagram of the three-dimensional structure of the low beam module of the present invention; Figure 7 for Figure 6 Schematic diagram of the decomposition; Figure 8 This is a schematic diagram of the light path when the LED lamp beads in the low beam module emit light; Figure 9 It is a light spot diagram with bright and dark cut-off lines formed when the LED lamp beads emit light through the low beam lens; Figure 10 It is the light pattern formed when the LED lamp beads pass through the low beam lens when emitting light; Figure 11 This is the light path diagram of the LED lamp bead after part of the light passes through the focusing structure when it emits light.

[0038] Description of reference numerals: 1. Low beam lens; 11. Focusing structure; 111. Groove; 112. Convex structure; 12. First molding surface; 13. Second molding surface; 14. Molding slope; 15. Shading portion; 16. Light-emitting convex surface; 2. Radiator; 3. LED lamp beads; 4. Circuit board; 5. Screws; 6. Chuck; 7. Mounting base. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0040] An embodiment of a low beam lens provided by the present invention: like Figure 1 and Figure 2 As shown, the low beam lens 1 is a total reflection lens having a light focusing structure 11 , a cut-off line forming surface, a light shielding portion 15 and a light emitting convex surface 16 .

[0041] Specifically, the low-beam lens 1 is integrally injection-molded from PC material, forming a one-piece structure. PC, short for polycarbonate, is a high-performance engineering plastic with properties such as high strength, high transparency, and impact and heat resistance. Of course, in other embodiments, the low-beam lens 1 may also be integrally injection-molded from PMMA.

[0042] In this embodiment, for the convenience of description, the light incident end of the low beam lens 1 is defined as its front end, and the light emitting end of the low beam lens 1 is defined as its rear end.

[0043] like Figure 3 、 Figure 5 and Figure 8 As shown, the focusing structure 11 is located at the front end of the low beam lens 1, and there are three of them arranged side by side. The three focusing structures 11 correspond to the LED lamp beads 3 one by one during installation. The three focusing structures 11 are the left focusing structure, the right focusing structure and the middle focusing structure. The left focusing structure and the right focusing structure are symmetrically distributed with respect to the middle focusing structure. Figure 4 As shown, each focusing structure 11 is a total reflection focusing cup, which is provided with a groove 111. The inner wall surface of each groove 111 is a curved surface. The opening of each groove 111 is used to face the corresponding LED lamp bead 3. Each groove 111 is provided with a convex structure 112 protruding toward the corresponding LED lamp bead 3. Figure 11 and Figure 8As shown, part of the light emitted by the LED lamp bead 3 is emitted toward the inner wall of the groove 111, and after being refracted, it is emitted toward the outer wall of the focusing structure 11. Since the low beam lens 1 is a total reflection lens, this part of the light will not be emitted from the outer wall of the focusing structure 11, but will be reflected on the inner side of the outer wall. After reflection, the light will be emitted toward the focus. Figure 8 As shown, another portion of the light emitted by LED bead 3 is directed toward convex structure 112, where it is refracted. Ultimately, the refracted or reflected light is regularly directed toward the focal point, achieving a convergence effect and minimizing light loss. Both the inner wall and convex structure 112 are mathematically modeled using Snell's law for total reflection, and the control points of the surface contour are calculated using a mathematical iteration method.

[0044] The cut-off line forming surface has an area located below the focusing structure 11, such as Figure 3 and Figure 5 As shown, the cut-off line molding surface includes a first molding surface 12, a second molding surface 13 and a molding slope 14 connecting the first molding surface 12 and the second molding surface 13. The height of the first molding surface 12 is higher than the height of the second molding surface 13. The first molding surface 12, the second molding surface 13 and the molding slope 14 all extend from the position of the light-shielding portion 15 to the end of the focusing structure 11. The focus of the low beam lens 1 is at the intersection of the first molding surface 12 and the second molding surface 13.

[0045] like Figure 3 As shown, the shading portion 15 is located below the light-dark cutoff line forming surface and has a certain distance from the focusing structure 11 in the front-to-back direction. In this embodiment, the shading portion 15 is an arc surface. The light-emitting area is inside the lens and is located above the shading portion 15. The end face of the low-beam lens 1 away from the focusing structure 11 forms a light-emitting convex surface 16, and the projected area size of the light-emitting convex surface 16 in the front-to-back direction is 20mm*20mm. The light gathered by the focusing structure 11 will be emitted from the light-emitting area to the rear, and finally emitted from the light-emitting convex surface 16. The emitted area can form a light-dark cutoff line that complies with regulations, such as Figure 9 and Figure 10 shown.

[0046] The low-beam lens 1 of the present invention utilizes total internal reflection, integrating functions such as light focusing, cutoff line shaping, and light shielding into a single lens. This replaces the focusing components, light shielding plates, and lenses in traditional LED modules, reducing the number of components and simplifying the overall structure, making assembly easier. With a light diameter of only 20mm x 20mm, the low-beam lens 1 of the present invention is compact and, while maintaining the same luminous flux, can achieve the same effect as a traditional 60mm x 60mm lens. Its optical performance remains stable over long-term use.

[0047] It should be noted that the focusing structures 11 are not limited to the three in this embodiment, and reasonable design selection can be made according to the corresponding vehicle model and actual lighting needs, while meeting national laws and regulations.

[0048] Furthermore, the projected area of ​​the light-emitting convex surface 16 in the front-to-back direction is not limited to 20 mm x 20 mm, as long as the lighting effect is at least as good as that of the original halogen headlight and meets national regulations. Furthermore, the projected shape of the light-emitting convex surface 16 in the front-to-back direction is not limited to a square; it can also be a circle or other shape, such as a parallelogram.

[0049] The embodiment of the low beam module provided by the present invention: like Figure 6 and Figure 7 As shown, the low beam module includes a chuck 6, a plurality of LED lamp beads 3, a circuit board 4, a heat sink and a low beam lens 1 assembled together.

[0050] Among them, multiple LED lamp beads 3 are directly welded on the circuit board 4, and the circuit board 4 is fixed in the sleeve of the radiator by screws 5. The radiator is provided with multiple heat sinks 2, which can transfer the heat generated by the LED lamp beads 3 when they emit light to the external environment, ensuring the safe use of the LED lamp beads 3 and the circuit board 4. The focusing structure 11 area of ​​the low beam lens 1 extends into the sleeve of the radiator and corresponds one-to-one with the LED lamp beads 3. The outer sleeve of the low beam lens 1 is provided with a mounting seat 7, and the mounting seat 7 and the radiator are tightened by a chuck 6 to realize the assembly of the entire low beam module. The chuck 6 is an H7 chuck 6, which ensures that the low beam module can be directly adapted to the H7 lamp holder of the original vehicle without the need for additional modification of the interface. The structure of the low beam lens 1 in the low beam module is the same as the structure in the above-mentioned embodiment of the low beam lens 1, and will not be described in detail here.

[0051] After overall assembly, the distance between the chuck 6 and the light-emitting convex surface 16 of the low-beam lens 1 is equal to the length of the H7 bulb to be replaced, ensuring that the installation position of the low-beam module is consistent with the optical focus of the original vehicle halogen lamp, avoiding optical path deviation and light pattern distortion caused by installation position offset.

[0052] The low beam module of the present invention integrates a chuck 6, LED lamp beads, a circuit board 4, a heat sink and a low beam lens 1 with integrated functions. The optical component has only one part, the low beam lens 1, which can meet the requirements of national regulations for automobile low beam lamps, and the light source input is 1200Im; the entire optical mechanism principle only requires two components, the LED lamp beads 3 and the low beam lens 1. The optical structure is simple, reliable, and has very high consistency. According to actual test results, the luminous efficiency is improved by more than 50%. In addition, the low beam module of the present invention is small in size, with a light-emitting diameter of only 20mm*20mm. Under the condition of the same light source luminous flux, it can achieve the luminous effect of a traditional 60mm*60mm halogen lamp. The low beam module of the present invention combines the low energy consumption and long life characteristics of the LED lamp beads 3, cooperates with the heat sink to ensure heat dissipation, and adopts an integrally injection-molded low beam lens 1 to ensure stable optical performance during long-term use, taking into account both efficient lighting and durability.

[0053] When installing the low beam module of the present invention, it is only necessary to remove the halogen bulb of the original vehicle without removing the original vehicle's optical components such as the reflector bowl and the sunshade. It can be directly inserted for fixation. As an independent optical system, it does not need to rely on the original vehicle's optical components such as the reflector bowl and the sunshade to emit a light pattern that meets regulatory requirements.

[0054] It should be noted that the aforementioned chuck 6 is not limited to the H7 chuck. In actual use, it can also be an H4 chuck, HB3 chuck, or turn signal bulb holder, mounted on an adjustment bracket or housing. Accordingly, after installation, the distance between the chuck 6 and the light-emitting convex surface of the low-beam lens 1 is consistent with the length of the bulb mounted on the corresponding chuck. With the function of the chuck 6, the original vehicle bulb can be replaced without damage, but this is not limited to this. It is also applicable to newly developed or newly designed headlights, making it possible to replace LED headlight light sources in the future.

[0055] The projected area of ​​the light-emitting convex surface 16 in the front-to-back direction is not limited to 20 mm by 20 mm, as long as the lighting effect is no less than that of the original halogen headlight and meets national regulations. Furthermore, the projected shape of the light-emitting convex surface 16 in the front-to-back direction is not limited to a square and can also be a circle or other shape, such as a parallelogram.

[0056] The embodiment of the vehicle provided by the present invention: The vehicle includes a vehicle body, on which a low beam module is mounted. The structure of the low beam module is the same as that in the above-mentioned embodiment of the low beam module, and will not be described in detail here.

[0057] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "inside", "outside" and other terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings of this specification. They are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0058] In the description of this specification, “a plurality of” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Low beam lens, characterized in that: It is a fully reflective lens with an integrated structure. It has a focusing structure for corresponding to the LED lamp beads one by one, and also has a light-cutoff line forming surface located below the focusing structure. The low beam lens has a shading portion below the light-cutoff line forming surface. A light-emitting area is formed in the low beam lens above the shading portion, and a light-emitting convex surface is formed on the end face of the low beam lens away from the focusing structure.

2. The low beam lens according to claim 1, characterized in that: The light-concentrating structure is a total reflection light-concentrating cup.

3. The low beam lens according to claim 2, characterized in that: There are three focusing structures, each of which is provided with a groove. The inner wall surfaces of each groove are curved surfaces. The opening of each groove is used to face the corresponding LED lamp bead. Each groove is provided with a convex structure that convexly faces the corresponding LED lamp bead. The light incident end of the low beam lens is defined as its front end, and the light emitting end of the low beam lens is defined as its rear end. The three focusing structures are respectively a left-side focusing structure, a right-side focusing structure and a middle focusing structure. The left-side focusing structure and the right-side focusing structure are symmetrically distributed about the middle focusing structure.

4. The low beam lens according to claim 1, wherein: The cut-off line forming surface includes a first forming surface, a second forming surface, and a forming inclined surface connecting the first forming surface and the second forming surface. The height of the first forming surface is higher than the height of the second forming surface. The first forming surface, the second forming surface, and the forming inclined surface all extend from the position of the light-shielding portion to the end of the focusing structure. The focus of the low beam lens is at the intersection of the first forming surface and the second forming surface.

5. The low beam lens according to any one of claims 1 to 4, characterized in that: The light shielding portion is a curved surface.

6. The low beam lens according to any one of claims 1 to 4, characterized in that: The projected area size of the light-emitting convex surface in the front-to-back direction is 20 mm*20 mm.

7. The low beam lens according to any one of claims 1 to 4, characterized in that: The low beam lens is made of PC material or PMMA material by integral injection molding.

8. Low beam module, characterized in that: The invention comprises a chuck, a plurality of LED lamp beads, a circuit board, a heat sink and a low beam lens assembled together, wherein the low beam lens is the low beam lens according to any one of claims 1 to 7.

9. The low beam module according to claim 7, characterized in that: The chuck is one of an H7 chuck, an H4 chuck, an HB3 chuck or a turn signal bulb holder, and the distance between the chuck and the light-emitting convex surface of the low-beam lens is equal to the length of the bulb to be replaced.

10. A vehicle comprising a vehicle body, characterized in that The low beam module according to claim 8 or 9 is installed on the vehicle body.

Images