Optical lens and bicycle lamp
By adopting an optical lens with an asymmetric structure in the bicycle light, the combination of the first reflective surface and the refractive part is used to solve the problem of spot light type glare for pedestrian eyes, and the uniform distribution and safety of spots are achieved.
Patent Information
- Application Number
- CN202422348197.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-25
AI Technical Summary
The use of symmetrical structure of the existing optical lens in bicycle lights will cause glare to pedestrian eyes and endanger pedestrian safety.
An optical lens adopting an asymmetric structure includes a first reflective surface and a plurality of refractive parts. The first half of the first reflective surface is used to collimate the light, and the second half is used to total reflection. A plurality of refractive parts are provided at the exit end. Through the combination of the asymmetric structure and the refractive part, the light exit angle is adjusted to form a sharp cutoff line to avoid concentration of light.
The uniform distribution of light spots is achieved, avoiding the stimulation of glare to the human eye, and improving lighting effect and riding safety.
Smart Images
Figure CN223121233U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of lighting technology, and more specifically, to an optical lens and a bicycle lamp including the optical lens. Background Art
[0002] Lighting has been getting closer and closer to people's lives. However, in some special occasions, ordinary light cannot meet people's needs. Therefore, a lens is usually used for secondary optical light distribution of the light source. However, optical lenses usually use a symmetric structure. In the application scenario of bicycle lamps, the symmetric spot light pattern will cause glare to pedestrians' eyes and endanger pedestrians' safety. Summary of the Utility Model
[0003] The technical problem to be solved by the embodiments of this application is that the optical lens uses a symmetric structure, and the symmetric spot light pattern will cause glare to pedestrians' eyes and endanger pedestrians' safety.
[0004] To solve the above technical problem, the embodiments of this application provide an optical lens, adopting the following technical solutions:
[0005] An optical lens, the optical lens has a light incident end and a light exit end;
[0006] At the light incident end, a first reflecting surface is arranged inside the optical lens. The first reflecting surface includes a first half for collimating light and a second half for total reflecting light. The first half and the second half are of an asymmetric structure on the plane formed in the light path traveling direction;
[0007] A plurality of refracting parts are arranged at the light exit end.
[0008] Further, the refracting part includes a first refracting surface located in the middle of the light incident end and a second refracting surface and a third refracting surface located around the first refracting surface. The first refracting surface is an inclined curved surface.
[0009] Further, the first refracting surface is circular or square.
[0010] Further, wavy stripes are arranged on the second refracting surface. The second refracting surface is arranged on the first side and the second side opposite to the first refracting surface.
[0011] Further, the second refracting surface is inclined.
[0012] Further, wavy stripes are arranged on the third refracting surface. The third refracting surface is arranged on the third side and the fourth side opposite to the first refracting surface.
[0013] Further, in the light path traveling direction, the third refracting surface bulges upward or depresses downward compared with the second refracting surface.
[0014] Further, the third refracting surface is inclined.
[0015] Further, the optical lens is further provided with a fourth refracting surface and a fifth refracting surface; the fourth refracting surface is correspondingly arranged with the first reflecting surface, and the fifth refracting surface is correspondingly arranged with the refracting portion.
[0016] The embodiment of the present application provides a bicycle lamp, which adopts the following technical solutions:
[0017] A bicycle lamp includes a light source and the optical lens.
[0018] Compared with the prior art, the embodiment of the present application mainly has the following beneficial effects:
[0019] The first reflecting surface with an asymmetric structure in the present application can perform secondary optical light distribution on the light source. The first half of the first reflecting surface collimates the diverging light into parallel light for subsequent light regulation. The light exit angle is distributed within a certain range, that is, a sharp cut-off line is formed on the target surface. The collimated light is irradiated at the lower end of the cut-off line, so that there is no light irradiation at the lower end of the cut-off line. After the light is modulated by the second half total reflecting surface of the first reflecting surface, the light exit angle will be distributed from horizontal to downward deflection angle. The diverging light is totally reflected by the first reflecting surface, so that the light is not concentrated in one area, avoiding the over-concentration of the light source, making the overall light spot more uniform, avoiding the formation of visual blind areas, and improving the lighting effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the solutions in the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0021] Figure 1 It is one of the schematic structural diagrams of the optical lens according to the first embodiment of the present application;
[0022] Figure 2 It is the second schematic structural diagram of the optical lens according to the first embodiment of the present application;
[0023] Figure 3 It is the cross-sectional view of the optical lens according to the first embodiment of the present application;
[0024] Figure 4 It is the schematic structural diagram of the optical lens according to the second embodiment of the present application;
[0025] Figure 5 It is the cross-sectional view of the optical lens according to the second embodiment of the present application;
[0026] Figure 6 Schematic diagram of the irradiation direction path of the light emitted from the first reflecting surface in the embodiment of the present application;
[0027] Figure 7 Schematic diagram of the irradiation direction path of the light emitted from the first refracting surface in the embodiment of the present application;
[0028] Figure 8 Light spot diagram of the light in the embodiment of the present application;
[0029] Figure 9 Light curve diagram of the light in the embodiment of the present application.
[0030] Reference numerals: 1, first reflecting surface; 11, first half; 12, second half; 2, first refracting surface; 3, second refracting surface; 4, third refracting surface; 5, fourth refracting surface; 6, fifth refracting surface; 100, light incident end; 200, light exit end; 300, refracting part. Detailed implementation manners
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects and not to describe a specific order.
[0032] Referring to the embodiments mentioned herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0033] Referring to the attached Figure 1 to the attached Figure 8 As shown, the embodiment of the present application provides an optical lens, which adopts the following technical solution: An optical lens, the optical lens has a light incident end 100 and a light exit end 200;
[0034] At the light incident end 100, a first reflecting surface 1 is disposed inside the optical lens. The first reflecting surface 1 includes a first half portion 11 for collimating light and a second half portion 12 for totally reflecting light. The first half portion 11 and the second half portion 12 are of an asymmetric structure on the plane formed in the light path traveling direction.
[0035] The light output end 200 is provided with a plurality of refraction portions 300. The first reflecting surface 1 of the asymmetric structure can perform secondary optical light distribution on the light source. The first half portion 11 of the first reflecting surface 1 collimates the divergent light into parallel light for subsequent light control. The light exit angle is distributed within a certain range, that is, a sharp cut-off line D is formed on the target surface. The collimated light irradiates the lower end of the cut-off line, so that there is no light irradiation at the lower end of the cut-off line. After the light is modulated by the total reflection surface of the second half portion 12 of the first reflecting surface 1, the light exit angle will be distributed from horizontal to downward deflection angle. The divergent light is totally reflected by the first reflecting surface 1, so that the light is not concentrated in one area, avoiding the over-concentration of the light source, making the overall light spot more uniform, avoiding the formation of visual blind spots, and improving the lighting effect. At the same time, the refraction portion 300 modulates the light to deflect downward, effectively reducing glare, avoiding the irritation of glare to the human eye, enhancing the riding experience, and ensuring the safety of users and pedestrians.
[0036] Furthermore, in the first reflecting surface 1 of the asymmetric structure, the slope of the second half portion 12 of the first reflecting surface 1 is greater than the slope of the first half portion 11 of the first reflecting surface 1, so that the first half portion 11 collimates the divergent light into parallel light, and the second half portion 12 is a total reflection surface with a non-linear curvature, refracting the divergent light to form light that is partially parallel and partially inclined downward for subsequent light control. The light exit angle is distributed within a certain range, and a sharp cut-off line D is formed on the target surface.
[0037] As shown in the attached Figure 1 to the attached Figure 5 figure, further, the refraction portion 300 includes a first refracting surface 2 located in the middle of the light incident end 100 and a second refracting surface 3 and a third refracting surface 4 located around the first refracting surface 2. The first refracting surface 2 is provided with wavy stripes, and the first refracting surface 2 is an inclined curved surface. The refraction of the light through the wavy stripes makes the light exit angle distributed within a certain range, so that the illuminance value of the light spot at the target surface does not exceed the requirements of the German StVZO regulations and a sharp cut-off line D is formed. At the same time, the light exit angle can also be modulated to ensure the floodlight angle of the light spot and improve the overall uniformity of the light spot. In addition, the inclined curved surface can prevent the first refracting surface 2 from reflecting the light back into the optical lens, effectively improving the light, avoiding the stray light emitted by the lens, and improving the light utilization rate of the lens.
[0038] As shown in the attached Figure 1 to the attachedFigure 5 As shown, further, the first refracting surface 2 is circular or square. As shown in the appended Figure 1 to the appended Figure 3 figures. In the first embodiment of the present application, the first refracting surface 2 is circular, and the circular first refracting surface 2 can modulate light into a circular light spot with a cut-off line. As shown in the appended Figure 4 to the appended Figure 5 figures. In the second embodiment of the present application, the first refracting surface 2 is square, and the square first refracting surface 2 can modulate light into a square light spot with a cut-off line, facilitating configuring the optical lens into a desired light spot shape according to needs.
[0039] As shown in the appended Figure 1 to the appended Figure 5 figures. Further, wavy stripes are provided on the second refracting surface 3, and the second refracting surface 3 is disposed on the first side and the second side opposite to the first refracting surface 2. Compared with the prior art in which a flat wavy stripe light-emitting surface has weak light control ability, light divergence, and poor effect on controlling the position of the light spot on the target surface, after refraction by the second refracting surface 3 in the present application, the cut-off line D is distinct between light and dark, and the light beam is evenly distributed, making the optical lens applicable to scenarios with specific requirements for the divergence angle.
[0040] As shown in the appended Figure 1 to the appended Figure 5 figures. Further, the second refracting surface 3 is inclined. The inclined second refracting surface 3 facilitates further regulating the exit angle of light, ensuring the floodlight angle of the light spot and improving the overall uniformity of the light spot. At the same time, the second refracting surface 3 is an inclined free-form surface light-emitting surface, and the second refracting surface 3 modulates the light to deflect downward, reducing glare, avoiding the stimulation of glare to the human eye, improving the riding experience, ensuring the safety of users and pedestrians, and the inward inclination angle of the free-form surface is smaller, making the appearance of the optical lens harmonious.
[0041] Furthermore, the upper end of the second refracting surface 3 is inclined in the direction from the light-emitting end 200 towards the light-incident end 100, and the inclination angle is 0 - 20°. The first side and the second side are respectively the left side and the right side of the first refracting surface 2 when looking directly at the light-incident end 100, that is, the two second refracting surfaces 3 are symmetrically disposed on the left and right sides of the first refracting surface 2.
[0042] As shown in the appended Figure 1 to the appended Figure 5As shown, further, there are wavy stripes provided on the third refracting surface 4, and the third refracting surface 4 is arranged on the third side and the fourth side opposite to the first refracting surface 2. Compared with the prior art where a flat wavy stripe light-emitting surface has weak light control ability, light divergence, and poor effect in controlling the position of the light spot on the target surface, through the refraction of the third refracting surface 4 in this application, the cut-off line D is distinct between light and dark, and the light beam is evenly distributed, making the optical lens applicable to scenarios with specific requirements for the divergence angle.
[0043] As shown in the attached Figure 1 to the attached Figure 5 As shown, further, in the light path traveling direction, the third refracting surface 4 protrudes upward or depresses downward compared with the second refracting surface 3. The upward protrusion or downward depression of the third refracting surface 4 further enables the light exit angle to be distributed within a certain range, forming a sharp cut-off line D on the target surface. The second refracting surface 3 and the third refracting surface 4 at different positions are such that the illuminance value of the light spot at the target surface does not exceed the regulatory requirements.
[0044] As shown in the attached Figure 1 to the attached Figure 5 As shown, further, the third refracting surface 4 is inclined. The inclined third refracting surface 4 facilitates further regulation of the light exit angle, ensures the floodlight angle of the light spot and improves the overall uniformity of the light spot. At the same time, the third refracting surface 4 is an inclined free-form surface light-emitting surface, and the third refracting surface 4 modulates the light to deflect downward, reducing glare, avoiding the stimulation of glare to the human eye, enhancing the riding experience, ensuring the safety of users and pedestrians, and the inward inclination angle of the free-form surface is smaller, making the appearance of the optical lens coordinated.
[0045] Furthermore, the upper end of the second refracting surface 3 is inclined in the direction from the light-emitting end 20 towards the light-incident end 100, and the inclination angle is 0 - 20°. The third side and the fourth side are respectively the upper end and the lower end of the first refracting surface 2 when looking directly at the light-incident end 100, that is, the two third refracting surfaces 4 are symmetrically arranged at the upper and lower ends of the first refracting surface 2.
[0046] As shown in the attached Figure 1 to the attached Figure 5As shown, further, the optical lens is further provided with a fourth refracting surface 5 and a fifth refracting surface 6; the fourth refracting surface 5 is correspondingly arranged with the first reflecting surface 1, and the fifth refracting surface 6 is correspondingly arranged with the refracting portion 300. Part of the light source rays emitted from the light source are collimated by the fourth refracting surface 5 and then refracted and emitted through the first reflecting surface 1, so that the light emission angle is distributed within a certain range, the illuminance value of the light spot at the target surface does not exceed the regulatory requirements, and a sharp cut-off line D is formed. The remaining light source rays pass through the fifth refracting surface 6 and then are collimated into parallel light by the refracting portion 300 and emitted, so as to facilitate subsequent light control.
[0047] Furthermore, the optical lens is circular in shape, beautiful and generous, suitable for light source installation, and convenient for encapsulation.
[0048] Furthermore, the optical lens of the present application conforms to the German regulations design, that is, the distance between the light source and the measurement point is 10M. The central bright spot is called HV, the brightest spot is called Emax, HV>10Lux, Emax<1.2HV, 3.4°(A) above HV <2Lux (specification of the light and dark cut-off line), 1.5° below HV, 4° to the left and right >HV / 2, 5° below HV Lux, after 5° below HV, then 4° to the left and right >Lux. Among them, A<2Lux is to achieve the light and dark cut-off line D to prevent the car lights from affecting the line of sight of oncoming cyclists. The regulation of Emax is to prevent the beam of a single point from being too concentrated.
[0049] Based on the above optical lens, the embodiment of the present application provides a bicycle lamp, which adopts the following technical solutions:
[0050] A bicycle lamp includes a light source and the optical lens.
[0051] The asymmetric first reflecting surface 1 can perform secondary optical light distribution on the light source. The first half 11 of the first reflecting surface 1 collimates the diverging light into parallel light to facilitate subsequent light control. The light emission angle is distributed within a certain range. In the application scenario of the bicycle lamp, the bicycle lamp of the present application conforms to the German regulations design, and a sharp cut-off line D is formed on the target surface. After the light is modulated by the second half 12 of the first reflecting surface 1, the light emission angle will be distributed from horizontal to downward deflection angle. The total reflection of the diverging light by the first reflecting surface 1 makes the light not concentrated in one area, avoiding the over-concentration of the light source, making the overall light spot more uniform, avoiding causing a visual blind area, improving the lighting effect, and preventing the influence of the car lights on the line of sight of oncoming cyclists and pedestrians while meeting the observation line of sight of cyclists.
[0052] Obviously, the embodiments described above are only a part of the embodiments of the present application, rather than all of them. The preferred embodiments of the present application are shown in the drawings, but they do not limit the scope of the patent of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or equivalently replace some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present application in other related technical fields is equally within the scope of the patent protection of the present application.
Claims
1. An optical lens, characterized in that, The optical lens has an incident light end (100) and an emergent light end (200); At the incident light end (100), a first reflecting surface (1) is provided inside the optical lens. The first reflecting surface (1) includes a first half portion (11) for collimating light and a second half portion (12) for totally reflecting light. The first half portion (11) and the second half portion (12) are of an asymmetric structure on the plane formed in the light path traveling direction; The emergent light end (200) is provided with a plurality of refracting portions (300).
2. The optical lens according to claim 1, wherein The refracting portion (300) includes a first refracting surface (2) located in the middle of the incident light end (100), and a second refracting surface (3) and a third refracting surface (4) located around the first refracting surface (2). The first refracting surface (2) is an inclined curved surface.
3. The optical lens according to claim 2, wherein, The first refracting surface (2) is circular or square.
4. The optical lens according to claim 2, characterized in that Wave-shaped stripes are provided on the second refracting surface (3). The second refracting surface (3) is provided on the first side and the second side opposite to the first refracting surface (2).
5. The optical lens according to claim 4, characterized in that, The second refracting surface (3) is inclined.
6. The optical lens according to claim 2, characterized in that, Wave-shaped stripes are provided on the third refracting surface (4). The third refracting surface (4) is provided on the third side and the fourth side opposite to the first refracting surface (2).
7. The optical lens according to claim 6, wherein In the light path traveling direction, the third refracting surface (4) bulges upward or depresses downward compared with the second refracting surface (3).
8. The optical lens according to claim 7, characterized in that, The third refracting surface (4) is inclined.
9. The optical lens according to any one of claims 1-8, characterized in that, The optical lens is further provided with a fourth refracting surface (5) and a fifth refracting surface (6); the fourth refracting surface (5) is correspondingly arranged with the first reflecting surface (1), and the fifth refracting surface (6) is correspondingly arranged with the refracting portion (300).
10. A bicycle lamp, characterized in that, It includes a light source and the optical lens according to any one of claims 1-9.