Optical lens and bicycle lamp

Abstract

The utility model belongs to the technical field of illumination, and relates to an optical lens which is provided with a light inlet end and a light outlet end, the light outlet end is provided with a first refraction part located in the middle and second refraction parts located on the periphery of the first refraction part, and the second refraction parts are provided with wavy stripes. The curvature of the wave-shaped stripes is gradually changed. The utility model further relates to a bicycle lamp. The curvature of the wave-shaped stripes is the gradient curvature, so that the deflection capacities of the light rays incident from different positions of the wave-shaped stripes are different, the light rays are non-uniformly distributed on the target surface T, that is, the illumination in the middle is concentrated, the light rays are diverged at the edge, the light ray distribution conforms to the visual characteristics of human eyes, accurate light control is realized, and the accuracy of light control is improved. Meanwhile, the whole optical lens is attractive and elegant, the wave-shaped stripes do not protrude out of the plane formed by the shell, the wave-shaped stripes are effectively prevented from being abraded, and the light control capacity is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lighting, more particularly, to an optical lens and a bicycle lamp comprising the optical lens. BACKGROUND

[0002] Lighting has been increasingly close to people's life, but in some special occasions, ordinary light cannot meet people's needs, so a lens is usually used to perform secondary optical distribution of light sources, but the existing optical lens usually uses one or more convex structures, which is not beautiful in appearance, the convex surface has a risk of wear, and the convex structure cannot accurately control light, so the prior art cannot meet our requirements. CONTENT OF THE UTILITY MODEL

[0003] The technical problem to be solved by the embodiments of the present application is that one or more convex structures are not beautiful in appearance, the convex surface has a risk of wear, and the convex structure cannot accurately control light.

[0004] In order to solve the above technical problem, the embodiments of the present application provide an optical lens, which adopts the technical scheme as follows:

[0005] An optical lens has an incident end and an emitting end, the emitting end is provided with a first refractive part in the middle and a second refractive part around the first refractive part, the second refractive part is provided with a wave-shaped stripe, and the curvature of the wave-shaped stripe is a gradually changing curvature.

[0006] Further, the curvature gradually increases from the middle to both sides of the wave-shaped stripe.

[0007] Further, the second refractive part includes a first refractive surface and a second refractive surface, and the first refractive surface is arranged on the first side and the second side opposite to the first refractive part.

[0008] Further, on the first refractive surface, an angle between an incident light ray from the middle of the wave-shaped stripe and a normal is defined as θ1, an angle between a refracted light ray and the normal is defined as θ1', the refracted light ray converges at O1 on the emitting end; an angle between an incident light ray from the both sides of the wave-shaped stripe and the normal is defined as θ2, an angle between a refracted light ray and the normal is defined as θ2', and the refracted light ray converges at O2 on the emitting end.

[0009] Wherein, the distance between O2 and the first refractive surface is greater than the distance between O1 and the first refractive surface; the angle between the incident light ray and the normal and the angle between the refracted light ray and the normal satisfy the following conditions: θ1> θ2, θ1'> θ2'.

[0010] Further, the first refractive surface and the second refractive surface are arranged obliquely.

[0011] Further, a first reflecting surface is arranged in the optical lens at the light-in end, the first reflecting surface comprises a first half part for total reflecting light and a second half part for collimating light, the first half part and the second half part are asymmetric structures in a plane formed by the light path direction.

[0012] Further, the second reflecting surface is arranged at a third side and a fourth side opposite to the first reflecting part, and the included angle between the refracted light at the third side and the refracted light at the fourth side is 0-30° on the second reflecting surface.

[0013] Further, a positioning block or a positioning groove is arranged on the optical lens; and / or,

[0014] A groove is arranged on the optical lens, and the groove is used for mounting a sealing ring; and / or,

[0015] A connecting surface is arranged on the optical lens; and / or,

[0016] A buckle or a clamping groove is further arranged on the optical lens.

[0017] Further, the first reflecting part comprises a third reflecting surface and a fourth reflecting surface arranged symmetrically, a fifth reflecting surface arranged at two sides of the third reflecting surface, and a sixth reflecting surface arranged at two sides of the fourth reflecting surface, and the third reflecting surface, the fourth reflecting surface, the fifth reflecting surface and the sixth reflecting surface are respectively inclined free curved surfaces.

[0018] Further, in the light path direction, the third reflecting surface is convex upward or concave downward compared with the fourth reflecting surface and / or the fifth reflecting surface, and the fifth reflecting surface is convex upward or concave downward compared with the sixth reflecting surface.

[0019] The embodiment of the present application provides a bicycle lamp, which adopts the technical scheme as follows:

[0020] A bicycle lamp comprises a light source and an optical lens.

[0021] Compared with the prior art, the embodiment of the present application has the following beneficial effects: the curvature of the wave-shaped stripe arranged in the present application is a gradually changing curvature, so that the deflection ability of the light rays incident from different positions of the wave-shaped stripe is different, thereby making the light rays be unevenly distributed on the target surface T, that is, the illuminance is concentrated in the middle, and the light rays are divergent at the edges. This light distribution conforms to the human eye visual characteristics, realizes precise light control, effectively improves the whole lamp range, and the optical lens is overall elegant and generous. The wave-shaped stripe does not protrude out of the plane formed by the shell, effectively prevents the wave-shaped stripe from being worn, and ensures the light control ability. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the scheme in the present application, the following will be a brief description of the drawings needed to be used in the embodiment description, obviously, the following description of the drawings is some embodiments of the present application, for those skilled in the art, without paying the creative labor, can also obtain other drawings according to these drawings.

[0023] Figure 1 Structure diagram of optical lens of the embodiment of the present application;

[0024] Figure 2 Structure diagram of optical lens of the embodiment of the present application;

[0025] Figure 3 Front view of optical lens of the embodiment of the present application;

[0026] Figure 4 Sectional view of optical lens of the embodiment of the present application;

[0027] Figure 5 Refraction diagram of light through the wave-shaped stripe in the embodiment of the present application;

[0028] Figure 6 Illumination direction path diagram of the emergent light through the wave-shaped stripe in the embodiment of the present application;

[0029] Figure 7 Light spot diagram of light through the wave-shaped stripe in the embodiment of the present application;

[0030] Figure 8 Refraction diagram of light through the second refractive surface in the embodiment of the present application;

[0031] Figure 9 Light spot diagram of light through the second refractive surface in the embodiment of the present application;

[0032] Figure 10 Light spot diagram of light through the third refractive surface in the embodiment of the present application;

[0033] Figure 11 Light spot diagram of light through the fourth refractive surface in the embodiment of the present application;

[0034] Figure 12 Light spot diagram of light through the fifth refractive surface in the embodiment of the present application;

[0035] Figure 13 Light spot diagram of light through the sixth refractive surface in the embodiment of the present application;

[0036] Figure 14 Light spot diagram of light through the first refractive part in the embodiment of the present application;

[0037] Figure 15 Light spot diagram of the embodiment of the present application;

[0038] Figure 16 Light curve diagram of the embodiment of the present application.

[0039] Reference signs: 100, light-in end; 200, light-out end; 300, first refractive part; 400, second refractive part; 1, first refractive surface; 2, second refractive surface; 3, first reflecting surface; 31, first half part; 32, second half part; 4, third refractive surface; 5, fourth refractive surface; 6, fifth refractive surface; 7, sixth refractive surface; 8, seventh refractive surface; 9, eighth refractive surface; 10, positioning block; 11, groove; 12, connecting surface; 13, buckle. DETAILED DESCRIPTION

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the present application will be described with reference to the drawings in which is shown by way of illustration the application in accordance with embodiments described herein in which:

[0041] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment.

[0042] Reference is made to the accompanying drawings that form a part of this Figure 1 Reference is made to the accompanying drawings that form a part of this Figure 16 As shown in the drawings, the embodiment of the present application provides an optical lens, which adopts the technical scheme as follows:

[0043] An optical lens, the optical lens has a light-in end 100 and a light-out end 200, the light-out end 200 is provided with a first refractive part 300 located in the middle and a second refractive part 400 located around the first refractive part 300, the second refractive part 400 is provided with a wave-shaped stripe, the curvature of the wave-shaped stripe is a gradually changing curvature.

[0044] The wavy stripes in this application have a gradually changing curvature, which causes the light rays incident from different positions on the wavy stripes to have different deflection capabilities. This results in an uneven distribution of light on the target surface T, with concentrated illuminance in the middle and diffused light at the edges. This light distribution conforms to the characteristics of human vision, enabling precise light control and effectively improving the overall lamp range. At the same time, the optical lens is aesthetically pleasing, and the wavy stripes do not protrude beyond the plane formed by the outer shell, effectively preventing wear on the wavy stripes and ensuring light control capability.

[0045] Furthermore, each of the wavy stripes has the same structure, and its curvature is a gradual curvature. The curvature of the wavy stripe in this application can be reflected as the tangent slope of the wavy stripe. The tangent slope of the surface at the edge of the wavy stripe is large, and the slope of the surface in the middle gradually decreases, and the surface gradually becomes flat.

[0046] As attached Figure 1 To be continued Figure 7 As shown, further, the curvature gradually increases from the middle of the wavy stripes towards both sides. The greater curvature on both sides of the wavy stripes provides a stronger deflection capability for the light beam, while the smaller curvature in the middle of the wavy stripes, i.e., a gentler surface, results in a weaker refraction capability for the light beam. This causes the light to be biased towards the middle of the target surface T, resulting in concentrated illuminance at the middle of the target surface T. Furthermore, the illuminance gradually decreases from the middle of the target surface T towards the edges, i.e., the light diverges at the edges. This light distribution conforms to the characteristics of human vision, effectively increasing the overall lamp range and achieving precise light control.

[0047] As attached Figure 1 and attached Figure 3 As shown, the second refractive part 400 further includes a first refractive surface 1 and a second refractive surface 2. The first refractive surface 1 is disposed on a first side and a second side opposite to the first refractive part 300. By setting the first refractive surface 1 and the second refractive surface 2 at different positions, the light beam is modulated in different ways. The light beams modulated by the different first refractive surfaces 1 and 2 converge on the target surface T to form the desired light spot, thereby achieving precise light control.

[0048] Furthermore, when viewing the optical lens from the direction away from the light path, i.e., looking directly at the optical lens, the first side and the second side are on the left and right sides of the first refractive part 300, that is, the two first refractive surfaces 1 are symmetrically arranged on the left and right sides of the first refractive part 300.

[0049] As attached Figure 1 and attached Figure 3As shown, further, on the first refractive surface 1, the angle between the light ray incident from near the center of the wavy stripe and the normal is defined as θ1, the angle between the refracted light ray and the normal is defined as θ1', and the refracted light ray converges at O1 of the light-emitting end 200; the angle between the light ray emitted from near the sides of the wavy stripe and the normal is defined as θ2, the angle between the refracted light ray and the normal is defined as θ2', and the refracted light ray converges at O2 of the light-emitting end 200;

[0050] Wherein, the distance between O2 and the first refracting surface 1 is greater than the distance between O1 and the first refracting surface 1; the angle between the incident ray and the normal and the angle between the refracted ray and the normal satisfy the following conditions: θ1>θ2, θ′1>θ′2.

[0051] According to the law of refraction, the incident ray and the refracted ray satisfy the following formula:

[0052] n1sinθ1=nsinθ1'

[0053] n1sinθ2=nsinθ2'

[0054] Where n1 is the refractive index of the wave lens, and n is the refractive index of air.

[0055] As attached Figure 5 To be continued Figure 7 As shown, since θ1>θ2, sinθ in The light beam exhibits monotonicity within the interval and is an increasing function, therefore θ1'>θ2'. Due to the different deflection angles, beams of different apertures converge at different positions on the rear surface of the lens. Therefore, the positions of O1 and O2 do not coincide, and the distance between O2 and the first refractive surface 1 is greater than the distance between O1 and the first refractive surface 1. After refraction on both sides of the wavy stripe, the beam angle is α, and after refraction in the middle part of the wavy stripe, the beam angle is β. Due to the difference in the convergence point and α>β, the light beam with an angle of β has a narrower spot range on the target surface T and is more concentrated, while the light beam with an angle of α has a larger range on the target surface T and is more dispersed. This results in an uneven distribution of light on the target surface T, i.e., concentrated illuminance in the middle and divergent light at the edges. This light distribution conforms to the characteristics of human vision, effectively improving the overall lamp range and achieving precise light control.

[0056] Furthermore, the direction of the wavy stripe protrusion is the direction of light path travel. Therefore, the surface of the second refractive part 400 facing the light-emitting end 200 is the first refractive surface 1 and the second refractive surface 2. That is, the surfaces of the first refractive surface 1 and the second refractive surface 2 are wavy, and the curvature of the wavy shape is a gradual curvature.

[0057] As attached Figure 1 and attached Figure 3As shown, further, the first refractive surface 1 and the second refractive surface 2 are arranged obliquely. The obliquely arranged first refractive surface 1 and the second refractive surface 2 facilitate further regulation of the exit angle of the light, ensure the flood angle of the light spot and improve the overall uniformity of the light spot, effectively improve the range of the whole lamp, and achieve precise light control.

[0058] As shown in FIG. 1, FIG. 2 and FIG. 3, further, the optical lens is provided with a first reflection surface 3 in the light inlet end 100 (see FIG. 4 and FIG. 5), the first reflection surface 3 includes a first half 31 for total reflection of light and a second half 32 for collimation of light, and the first half 31 and the second half 32 are asymmetric structures in the plane formed in the direction of the light path. Figure 4 As shown in FIG. 1, FIG. 2 and FIG. 3, further, the optical lens is provided with a first reflection surface 3 in the light inlet end 100 (see FIG. 4 and FIG. 5), the first reflection surface 3 includes a first half 31 for total reflection of light and a second half 32 for collimation of light, and the first half 31 and the second half 32 are asymmetric structures in the plane formed in the direction of the light path. Figure 8 As shown in FIG. 1, FIG. 2 and FIG. 3, further, the optical lens is provided with a first reflection surface 3 in the light inlet end 100 (see FIG. 4 and FIG. 5), the first reflection surface 3 includes a first half 31 for total reflection of light and a second half 32 for collimation of light, and the first half 31 and the second half 32 are asymmetric structures in the plane formed in the direction of the light path. Figure 9 As shown in FIG. 1, FIG. 2 and FIG. 3, further, the optical lens is provided with a first reflection surface 3 in the light inlet end 100 (see FIG. 4 and FIG. 5), the first reflection surface 3 includes a first half 31 for total reflection of light and a second half 32 for collimation of light, and the first half 31 and the second half 32 are asymmetric structures in the plane formed in the direction of the light path. Figure 4 As shown in FIG. 1, FIG. 2 and FIG. 3, further, the optical lens is provided with a first reflection surface 3 in the light inlet end 100 (see FIG. 4 and FIG. 5), the first reflection surface 3 includes a first half 31 for total reflection of light and a second half 32 for collimation of light, and the first half 31 and the second half 32 are asymmetric structures in the plane formed in the direction of the light path. Figure 8 As shown in FIG. 1, FIG. 2 and FIG. 3, further, the optical lens is provided with a first reflection surface 3 in the light inlet end 100 (see FIG. 4 and FIG. 5), the first reflection surface 3 includes a first half 31 for total reflection of light and a second half 32 for collimation of light, and the first half 31 and the second half 32 are asymmetric structures in the plane formed in the direction of the light path.

[0059] Further, the first half 31 and the second half 32 are arranged in an inclined curved surface, which can also avoid reflection of light by the first refractive portion 300 or the second refractive portion 400 back into the optical lens, effectively improve the light, avoid stray light emitted by the lens, and improve the utilization rate of light of the lens.

[0060] Further, in the first reflective surface 3 of the asymmetric structure, the slope of the first half 31 of the first reflective surface 3 is smaller than the slope of the second half 32 of the first reflective surface 3, so that the deflection angle of the first half 31 is greater than the deflection angle of the second half 32, to facilitate subsequent light regulation, the light exit angle is distributed within a certain range, and a sharp cutoff line D is formed on the target surface T. Meanwhile, the second refractive surface 2 is provided with the wavy stripes, the curvatures on both sides of the wavy stripes are large, and the wavy stripes have stronger deflection ability for the light beam. The curvature of the middle part of the wavy stripes is small, that is, the surface is gentle, and the refraction ability of the wavy stripes for the light beam is weaker, so that the light is deviated to irradiate on the middle of the target surface T, that is, the illumination is concentrated in the middle of the target surface T, and the illumination gradually decreases from the middle to the edge of the target surface T, that is, the light is divergent at the edge. This light distribution conforms to the visual characteristics of the human eye, effectively improves the range of the whole lamp, and realizes precise light control.

[0061] As shown in the accompanying drawings Figure 4 and the accompanying drawings Figure 8 to the accompanying drawings Figure 9 Further, the second refractive surface 2 is arranged on the third side and the fourth side opposite to the first refractive part 300. The included angle between the refracted light on the third side and the refracted light on the fourth side is 0-30° on the second refractive surface 2. The collimated light is modulated by the wavy stripes of the second refractive surface 2 on the third side, and the light is deflected downward by a certain angle. The wavy stripes of the second refractive surface 2 on the fourth side modulate the light to be deflected upward by a certain angle. The spot edges of the two parts of light coincide at 3-5° of the target surface T, that is, the included angle between the refracted light on the third side and the refracted light on the fourth side is 3-5°. Thus, a clear and sharp cutoff line D is realized. The deflection angle of the light on the first refractive surface 1 is the same, and the spots corresponding to all the wavy surfaces coincide and splice on the target surface T to form a spot with concentrated illumination in the middle and divergent light at the edge, and a clear and sharp cutoff line D, which conforms to the visual characteristics of the human eye, effectively improves the range of the whole lamp, and realizes precise light control.

[0062] Further, when observing the optical lens from the direction opposite to the light path, the third side and the fourth side are on the upper side and the lower side of the first refractive part 300, that is, the two second refractive surfaces 2 are symmetrically arranged on the upper and lower sides of the first refractive part 300. Preferably, the included angle between the refracted light on the third side and the refracted light on the fourth side is 0-15°.

[0063] It can be understood that the included angle between the refracted light rays of the third side and the refracted light rays of the fourth side can be any of 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30° or a range formed by any two of them.

[0064] As shown in FIGS. 1 to 3, further, in some embodiments, a positioning block 10 or a positioning groove is arranged on the optical lens for positioning. The positioning block 10 is adapted to the positioning groove, and the positioning block 10 is clamped in the positioning groove during installation, so that the optical lens is installed in a unified manner, and the optical lens is prevented from being installed randomly due to lack of positioning, thereby avoiding the deformation of the light spot presented at the target surface T, the deflection of the cutoff line D, the excessive concentration of light rays, and the unevenness of the light spot. Figure 1 Figure 4 As shown in FIGS. 1 to 3, further, in some embodiments, a positioning block 10 or a positioning groove is arranged on the optical lens for positioning. The positioning block 10 is adapted to the positioning groove, and the positioning block 10 is clamped in the positioning groove during installation, so that the optical lens is installed in a unified manner, and the optical lens is prevented from being installed randomly due to lack of positioning, thereby avoiding the deformation of the light spot presented at the target surface T, the deflection of the cutoff line D, the excessive concentration of light rays, and the unevenness of the light spot.

[0065] In some embodiments, a groove 11 is arranged on the optical lens, and the groove 11 is used to install a sealing ring. The sealing ring is arranged so that the optical lens is sealingly connected to the lamp, and impurities such as water and dust are prevented from entering the lamp from the gap between the optical lens and the lamp, thereby preventing damage to the lamp and improving the service life of the lamp.

[0066] In some embodiments, a connecting surface 12 is arranged on the optical lens. During installation, the connecting surface 12 is tightly attached to the lamp to reduce the gap, so that the lamp is elegant and generous. At the same time, the connecting surface 12 cooperates with the sealing ring to effectively block impurities such as water and dust from entering the inside of the lamp, thereby enhancing the waterproof and dustproof ability of the lamp and prolonging the service life of the lamp.

[0067] In some embodiments, a buckle 13 or a clamping groove is further arranged on the optical lens. The clamping groove is adapted to the buckle 13, and the buckle 13 is clamped with the clamping groove during installation, so that the optical lens is connected to the lamp in a clamping manner, which is simple in structure and convenient to connect, thereby improving the disassembly and assembly efficiency of the lamp.

[0068] Further, in some embodiments, the buckle 13 and the positioning block 10 are arranged on the optical lens, and the positioning groove and the clamping groove are arranged on the lamp.

[0069] As shown in FIGS. 1 to 3, further, in some embodiments, a positioning block 10 or a positioning groove is arranged on the optical lens for positioning. The positioning block 10 is adapted to the positioning groove, and the positioning block 10 is clamped in the positioning groove during installation, so that the optical lens is installed in a unified manner, and the optical lens is prevented from being installed randomly due to lack of positioning, thereby avoiding the deformation of the light spot presented at the target surface T, the deflection of the cutoff line D, the excessive concentration of light rays, and the unevenness of the light spot. Figure 1 , and Figure 3 and Figure 10 As shown in FIGS. 1 to 3, further, in some embodiments, a positioning block 10 or a positioning groove is arranged on the optical lens for positioning. The positioning block 10 is adapted to the positioning groove, and the positioning block 10 is clamped in the positioning groove during installation, so that the optical lens is installed in a unified manner, and the optical lens is prevented from being installed randomly due to lack of positioning, thereby avoiding the deformation of the light spot presented at the target surface T, the deflection of the cutoff line D, the excessive concentration of light rays, and the unevenness of the light spot. Figure 14 ​As shown, further, the first refractive part 300 includes symmetrically arranged third and fourth refractive surfaces 4 and 5, and fifth and sixth refractive surfaces 6 and 7 arranged on both sides of the third and fourth refractive surfaces 4 and 5, respectively, and the third, fourth, fifth, and sixth refractive surfaces 4, 5, 6, and 7 are inclined free curved surfaces. The first refractive part 300 in the middle is divided into multiple different refractive surfaces, and the third, fourth, fifth, and sixth refractive surfaces 4, 5, 6, and 7 respectively implement more accurate light control, achieving light control in two dimensions of the X-axis direction vertically arranged in the light path direction and the Y-axis direction horizontally arranged in the light path direction. Under the joint modulation of the first and second refractive parts 300 and 400, the effective range is effectively improved, such as Figure 15 As shown, after the modulation of the optical lens, the overall light spot presents a shield type, the light spot is uniformly excessive, the cutoff line D is clear and sharp, the light spot illuminance distribution conforms to the human visual sense, and the user's use experience is improved.

[0070] Further, the free curved surface in the optical field refers to a curved surface without rotational symmetry and complex shape, i.e., an irregular curved surface, which has higher design freedom and can more flexibly control the light propagation path, thereby optimizing the performance of the optical lens.

[0071] Further, the first refractive part 300 is symmetric about the vertical direction and the horizontal direction, and in this embodiment, the third refractive surface 4 is an inclined surface, which adjusts the light spot edge cutoff line to be 3-5° at the target surface T to achieve a clear and sharp cutoff line D, and the corresponding light spot is as shown in Figure 10 The fourth refractive surface 5 is an inclined and convex free curved surface, which is arranged to ensure that the light spot corresponding to the third refractive surface 4 is aligned at the bottom and smoothly connected in the central region, and the corresponding light spot is as shown in Figure 11 The fifth refractive surface 6 has a light spot as shown in Figure 12 The sixth refractive surface 7 has a light spot as shown in Figure 13 The fifth and sixth refractive surfaces 6 and 7 are inclined free curved surfaces, which ensure that the light spots corresponding to other optical surfaces are aligned at the cutoff line to achieve a cutoff type light spot. The fifth and sixth refractive surfaces 6 and 7 have a certain curvature in the horizontal direction, which expands the light spot horizontally, and the width of the light spot expanded in the horizontal direction does not exceed the boundary of the light spot of the third and fourth refractive surfaces 4 and 5, thereby ensuring the smoothness of the light spot edge. The third, fourth, fifth, and sixth refractive surfaces 4, 5, 6, and 7 simultaneously perform light tracing, and finally form a light spot as shown in Figure 14 The optical lens is suitable for scenes with specific requirements for divergence angles.

[0072] Furthermore, the end of the third refractive surface 4 away from the fourth refractive surface 5, the end of the fifth refractive surface 6 away from the sixth refractive surface 7, the end of the fourth refractive surface 5 near the third refractive surface 4, and the end of the sixth refractive surface 7 near the fifth refractive surface 6 are respectively inclined from the light-emitting end 200 toward the light-incident end 100, with an inclination angle of 0-20°.

[0073] As attached Figure 1 Appendix Figure 3 and attached Figure 10 To be continued Figure 14 As shown, further, in the direction of light travel, the third refractive surface 4 is convex upward or concave downward compared to the fourth refractive surface 5 and / or the fifth refractive surface 6, and the fifth refractive surface 6 is convex upward or concave downward compared to the sixth refractive surface 7. The upward or downward convexity of the third, fourth, fifth, and sixth refractive surfaces 4 and 5, respectively, further ensures that the light emission angle is distributed within a certain range, forming a sharp cutoff line D on the target surface T, thereby ensuring that the illuminance value of the light spot at the target surface T does not exceed regulatory requirements.

[0074] Furthermore, the upward protrusion of the third refractive surface 4, the fourth refractive surface 5, the fifth refractive surface 6, or the sixth refractive surface 7 does not extend beyond the plane formed by the outer shell, effectively preventing the wavy stripes from wearing away and ensuring light control capability.

[0075] Furthermore, the first refractive part 300 is circular or square. Different shapes of the first refractive part 300 can modulate light into a circular spot with a cutoff line or a square spot with a cutoff line, facilitating the configuration of the optical lens into the desired spot shape as needed. The circular shape of the optical lens is aesthetically pleasing, suitable for light source installation, and easy to package.

[0076] Furthermore, the optical lens is also provided with a seventh refractive surface 8 and an eighth refractive surface 9; the seventh refractive surface 8 is correspondingly arranged with the second refractive part 400, and the eighth refractive surface 9 is correspondingly arranged with the first refractive part 300. Part of the light emitted from the light source is collimated by the seventh refractive surface 8 and then refracted by the second refractive part 400 before being emitted, ensuring that the light emission angle is distributed within a certain range. The illuminance value of the light spot at the target surface T will not exceed regulatory requirements, and a sharp cutoff line D is formed. The remaining light source light passes through the eighth refractive surface 9 and is collimated and modulated by the first refractive part 300 before being emitted, facilitating subsequent light control.

[0077] Based on the aforementioned optical lens, this application provides a bicycle lamp that employs the following technical solution:

[0078] The application discloses a bicycle lamp, which comprises a light source and an optical lens. The curvature of the wave-shaped stripe is gradually changed, so that the deflection ability of the light rays incident from different positions of the wave-shaped stripe is different, and the light rays are unevenly distributed on the target surface T, that is, the illumination is concentrated in the middle, and the light rays are divergent at the edges. The light distribution conforms to the visual characteristics of the human eye, effectively improves the range of the whole lamp, realizes precise light control, prevents the influence of the headlamp on the visual line of the oncoming drivers and pedestrians under the condition of observing the visual line of the cyclist, and satisfies the requirement. Meanwhile, the optical lens is elegant and generous as a whole, the wave-shaped stripe does not protrude out of the plane formed by the shell, the wave-shaped stripe is effectively prevented from being abraded, and the light control ability is ensured.

[0079] Obviously, the above-described embodiments are only some of the embodiments of the application, rather than all the embodiments, the preferred embodiments of the application are shown in the drawings, but do not limit the patent scope of the application. The application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the application more thorough and comprehensive. Although the application is described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or equivalently replace some technical features. Any equivalent structure made by using the content of the specification and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the application.

Claims

1. An optical lens, characterized in that, The optical lens has an entrance end (100) and an exit end (200), the exit end (200) is provided with a first refractive part (300) in the middle and a second refractive part (400) around the first refractive part (300), the second refractive part (400) is provided with a wave-shaped stripe, and the curvature of the wave-shaped stripe is gradually changed.

2. The optical lens of claim 1, wherein, The curvature gradually increases from the middle to both sides of the wave-shaped stripe.

3. The optical lens of claim 2, wherein, The second refractive part (400) comprises a first refractive surface (1) and a second refractive surface (2), and the first refractive surface (1) is arranged on the first side and the second side opposite to the first refractive part (300).

4. The optical lens of claim 3, wherein, On the first refractive surface (1), define the angle between the light ray incident from the wave-shaped stripe near the middle and the normal as θ1, the angle between the refracted light ray and the normal as θ1 ’ , the refracted light ray converges at the light exit end (200) ; define the angle between the light ray exiting from the wave-shaped stripe near the two sides and the normal as , the angle between the refracted light ray and the normal as θ2 ’ , the refracted light ray converges at the light exit end (200) ; wherein a distance between the first refractive surface (1) and the second refractive surface (2) is greater than a distance between the first refractive surface (1) and the second refractive surface (2); an angle between the incident light and the normal and an angle between the refracted light and the normal satisfy the following conditions: , .

5. The optical lens of claim 4, wherein, The first refractive surface (1) and the second refractive surface (2) are arranged obliquely.

6. The optical lens of claim 1, wherein, In the entrance end (100), a first reflecting surface (3) is arranged in the optical lens, the first reflecting surface (3) comprises a first half part (31) for totally reflecting light and a second half part (32) for collimating light, and the first half part (31) and the second half part (32) are asymmetric structures in the plane formed by the light path direction.

7. The optical lens of claim 3, wherein, The second refractive surface (2) is arranged on the third side and the fourth side opposite to the first refractive part (300), and the included angle between the refracted light on the third side and the refracted light on the fourth side is 0-30°.

8. The optical lens of any of claims 1-7, wherein, The optical lens is provided with a positioning block (10) or a positioning groove for positioning; and / or, The optical lens is provided with a groove (11) for mounting a sealing ring; and / or, The optical lens is provided with a connecting surface (12); and / or, The optical lens is further provided with a buckle (13) or a clamping groove.

9. The optical lens of any of claims 1-7, wherein, The first refractive part (300) comprises a third refractive surface (4) and a fourth refractive surface (5) arranged symmetrically, a fifth refractive surface (6) arranged on both sides of the third refractive surface (4), and a sixth refractive surface (7) arranged on both sides of the fourth refractive surface (5), and the third refractive surface (4), the fourth refractive surface (5), the fifth refractive surface (6), and the sixth refractive surface (7) are respectively inclined free curved surfaces.

10. The optical lens of claim 9, wherein, In the light path direction, the third refractive surface (4) is convex upward or concave downward compared with the fourth refractive surface (5) and / or the fifth refractive surface (6), and the fifth refractive surface (6) is convex upward or concave downward compared with the sixth refractive surface (7).

11. A bicycle light, characterized in that The optical lens comprises a light source and the optical lens as claimed in any one of claims 1-10.

Images