Lower light distribution lens and lampshade

Abstract

The lower light distribution lens comprises a lens body, a light gathering part is arranged on the lens body, the light gathering part is integrally formed on the lens body, the light gathering part comprises a light gathering wall and a total reflection wall, the exposed face of the light gathering wall is a curved face, a first groove is formed in one side wall of the light gathering wall, and a second groove is formed in the other side wall of the light gathering wall. The total reflection wall is located above the light gathering wall and connected with the light gathering wall, a double-different-medium total reflection face is arranged on the end face, away from the light gathering wall, of the total reflection wall, and the total reflection wall can reflect part of light emitted into the total reflection wall from the interior of the light gathering wall. Compared with the prior art, the lower light distribution lens and the lampshade have the advantages that more light rays can be guided to irradiate to the ground, and the light rays irradiating to the air are reduced, so that the illumination efficiency is effectively improved, the illumination intensity in the air is greatly reduced, and the negative influence of light pollution is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of lighting accessories and equipment, specifically relating to a lower light distribution lens and lampshade. Background Technology

[0002] Compared to traditional incandescent bulbs, LED lights consume less energy and have higher luminous efficiency. For the same brightness, LED lights consume less electricity, significantly reducing electricity bills and making them more widely used.

[0003] Because LED lights scatter light, they suffer from significant light energy loss, with most of the light being wasted in the air and failing to effectively illuminate the ground. This is especially true on high streetlight poles, where the lighting effect is significantly reduced.

[0004] For example, for safety reasons, LED streetlights are generally installed at a height of 3.5 meters or more, which causes most of the light they emit to shine into the air, resulting in weak ground brightness and failing to achieve the required illumination effect. This not only fails to provide good illumination for pedestrians and vehicles, but the light scattered in the air also causes light pollution and affects the vision of drivers.

[0005] Therefore, in order to address the aforementioned technical problems, it is necessary to provide a lower light distribution lens and a lampshade.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The purpose of this invention is to provide a downward light distribution lens and lampshade that can guide more light towards the ground and reduce light shining into the air, thereby effectively improving lighting efficiency, significantly reducing the intensity of light in the air, and reducing the negative impact of light pollution.

[0008] To achieve the above objectives, a specific embodiment of this utility model provides a lower light distribution lens and lampshade, including a lens body, a light-concentrating part provided on the lens body, the light-concentrating part being integrally formed on the lens body, the light-concentrating part including a light-concentrating wall and a total reflection wall, the exposed surface of the light-concentrating wall being curved, the total reflection wall being located above the light-concentrating wall, and the total reflection wall being able to reflect part of the light rays incident from inside the light-concentrating wall into the total reflection wall.

[0009] In one or more embodiments of this utility model, a first groove is formed on one side wall of the light-concentrating wall.

[0010] In one or more embodiments of this utility model, the distance between the groove wall of the first groove and the outer wall of the light-concentrating wall gradually increases from the upper part to the lower part.

[0011] In one or more embodiments of this utility model, the first groove is rectangular or U-shaped.

[0012] In one or more embodiments of this utility model, the total reflection wall and the focusing wall are connected, and a dual heterogeneous medium total reflection surface is provided on the end face of the total reflection wall away from the focusing wall.

[0013] In one or more embodiments of this utility model, the cross-section of the total reflection wall is trapezoidal, and the length of the end face of the total reflection wall away from the light-concentrating wall is greater than the end face of the total reflection wall and the light-concentrating wall that are connected.

[0014] In one or more embodiments of this utility model, a second groove is provided on the total reflection wall, and a conical groove is provided on the lower groove wall of the second groove.

[0015] In one or more embodiments of this utility model, a light-transmitting wall is provided between the conical groove and the first groove.

[0016] In one or more embodiments of this utility model, the lens body is provided with a snap-fit ​​groove that communicates with the first groove.

[0017] To achieve the above objectives, a specific embodiment of this utility model provides a downlight lampshade, including a lampshade body on which a plurality of downlight lenses are mounted.

[0018] Compared with existing technologies, the downward light distribution lens and lampshade of this utility model can guide more light towards the ground and reduce the light shining into the air, thereby effectively improving lighting efficiency, significantly reducing the intensity of light in the air, and reducing the negative impact of light pollution. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of a lower light distribution lens in one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a lower light distribution lens in one embodiment of the present invention. Figure 1 ;

[0022] Figure 3 This is a schematic diagram of the structure of a lower light distribution lens in one embodiment of the present invention. Figure 2 ;

[0023] Figure 4 This is a cross-sectional view of a lower light distribution lens in one embodiment of the present invention. Figure 1 ;

[0024] Figure 5 This is a cross-sectional view of a lower light distribution lens in one embodiment of the present invention. Figure 2 ;

[0025] Figure 6 This is a schematic diagram of the structure of a lower light distribution lens in one embodiment of the present invention. Figure 3 ;

[0026] Figure 7 This is a scattering diagram of light using a lower light distribution lens in one embodiment of the present invention;

[0027] Figure 8 This is a scattering diagram of light without using a light distribution lens in one embodiment of this utility model;

[0028] Figure 9 This is a front view of a lower light distribution lampshade in one embodiment of the present invention.

[0029] Explanation of key figure labels:

[0030] 1. Lens body; 11. Condensing wall; 111. First groove; 12. Total reflection wall; 121. Second groove; 1211. Conical groove; 122. Double-differential medium total reflection surface; 13. Snap-fit ​​groove; 14. Light-transmitting wall; 2. Lampshade body. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0032] like Figures 1 to 8 As shown, a lower light distribution lens in one embodiment of the present invention includes a lens body 1, a light-concentrating part on the lens body 1, the light-concentrating part includes a light-concentrating wall 11 and a total reflection wall 12, the exposed surface of the light-concentrating wall 11 is curved, the total reflection wall 12 is located above the light-concentrating wall 11, and the total reflection wall 12 can reflect part of the light emitted from the light-concentrating wall 11.

[0033] Specifically, the light-concentrating wall 11 is integrally molded onto the lens body 1, allowing for simultaneous production with the lens body 1 and reducing production costs through a single molding process. Furthermore, the light-concentrating wall 11 has a certain thickness. When the LED light is turned on, light enters the light-concentrating wall 11 from one end of the lens body 1 and then exits from the light-concentrating wall 11. As the light rays travel at an angle downwards, upon entering the light-concentrating wall 11, according to the law of refraction—that when light rays travel at an angle into a transparent medium, the refracted light rays will bend towards the normal—thereby causing a certain angular shift in the light rays as they enter the light-concentrating wall 11, increasing the angle of inclination and allowing more light to illuminate the road surface.

[0034] At the same time, because the exposed surface of the light-concentrating wall 11 is curved, when the light rays that have entered the light-concentrating wall 11 are emitted from the light-concentrating wall 11, the angle of the normal of the curved surface changes, causing the emitted light rays to be refracted again toward the ground, thereby increasing the amount of light rays that are irradiated on the ground and enabling the light rays to be further concentrated toward the ground.

[0035] like Figures 2 to 8 As shown, a first groove 111 is formed on one side wall of the focusing wall 11. The distance between the groove wall of the first groove 111 and the outer wall of the focusing wall 11 gradually increases from the top to the bottom.

[0036] Specifically, when light enters the focusing wall 11 from the first groove 111, the distance between the groove wall of the first groove 111 and the outer wall of the focusing wall 11 gradually increases, causing the light rays at different positions inside the focusing wall 11 to travel different distances within the focusing wall 11. The time and direction at which these light rays exit the focusing wall 11 are also different, which can change the angle of the light rays exiting the focusing wall 11, so that the light rays can be evenly irradiated diagonally downwards from the exposed surface of the focusing wall 11.

[0037] Furthermore, the first groove 111 can be rectangular or U-shaped. Specifically, when it is U-shaped, the U-shaped first groove 111 can further change the angle of the light entering the focusing wall 11, making the light more concentrated on the lower side of the exposed surface of the focusing wall 11, which is suitable for scenarios where the LED light installation height is greater than 4.5m. For LED lights with an installation height of less than 4.5m, a square shape can be selected to avoid excessive light concentration, which would lead to uneven lighting.

[0038] It is worth noting that, due to the scattering of light emitted by the LED lights, some light will shine obliquely upwards, and the focusing wall 11 cannot refract this part of the light towards the ground. To solve this problem, the total reflection wall 12 is located above and connected to the focusing wall 11, and a dual heterogeneous medium total reflection surface 122 is provided on the end face of the total reflection wall 12 away from the focusing wall 11.

[0039] Specifically, upward-sunlight rays enter the total reflection wall 12 and exit from it. They are then blocked by the dual-medium total reflection surface 122 and reflected back into the focusing wall 11, exiting from there. This reduces light waste, increases the amount of light reaching the ground, and improves lighting efficiency. It also helps to some extent prevent light pollution caused by light scattering in the air, which could impair the vision of drivers.

[0040] Furthermore, the cross-section of the total reflection wall 12 is an isosceles trapezoid and is inverted. Specifically, the length of the end face of the total reflection wall 12 away from the focusing wall 11 is greater than the end face where the total reflection wall 12 and the focusing wall 11 meet. Some of the light reflected from the second groove 121 will pass through the outer wall of the total reflection wall 12 and illuminate the ground. This not only does not affect the illumination effect but also reduces the amount of light entering the focusing wall 11, thereby reducing the heat generated by the focusing wall 11.

[0041] It is worth noting that, due to the non-absolute idealization of actual product materials and mold processes, the dual-dielectric total reflection surface 122 will cause a small amount of light to escape. This amount of light escape can not only compensate for the visual dark area above the lamp cover, but also will not cause light pollution.

[0042] like Figure 4 and Figure 5 As shown, a second groove 121 is formed on the total reflection wall 12, and a conical groove 1211 is formed on the lower groove wall of the second groove 121. Specifically, the conical groove 1211 causes the inclined surface to refract light rays that shine from the first groove 111 onto the dual-differential-medium total reflection surface 122, so that a portion of the light rays, after being reflected by the dual-differential-medium total reflection surface 122, can directly penetrate the total reflection wall 12 and shine onto the ground. This further reduces the heat generated by the first groove 111.

[0043] In addition, there is a light-transmitting wall 14 between the second groove 121 and the first groove 111. The light-transmitting wall 14 divides the first groove 111 and the second groove 121 and the conical groove 1211 into two regions, which enhances the heat dissipation effect of the lens body 1 and prevents the light-concentrating wall 11 from generating too much heat, which would cause defects such as black spots and yellow spots to appear in the first groove 111.

[0044] Furthermore, the lens body 1 is provided with a snap-fit ​​groove 13 that communicates with the first groove 111 and the conical groove 1211. Specifically, the size of the snap-fit ​​groove 13 can be made according to the tools for installing the LED lamp. When installing the lens body 1, the snap-fit ​​groove 13 covers the lamp holder of the LED lamp, so that the light-emitting body of the LED lamp enters the first groove 111, which can prevent light leakage.

[0045] like Figure 9 The lamp cover shown includes a lamp cover body 2, on which multiple lower light distribution lenses are mounted.

[0046] When using, such as Figure 3 , Figure 7 , Figure 8 and Figure 9 As shown, multiple downward-facing lenses are installed on the lampshade body 2, covering the LED lamp so that the light-emitting element on the LED lamp corresponds to the first groove 111. When the LED emits light, the light enters the focusing wall 11 from the first groove 111, and after refraction by the focusing wall 11, it illuminates the exposed surface of the focusing wall 11 at an angle below, improving road lighting conditions. The light entering the total reflection wall 12 is reflected by the double-differential medium total reflection surface 122. Part of the reflected light is directly and obliquely incident on the ground, while the other part is incident on the focusing wall 11 and also incident on the ground when it exits from the focusing wall 11.

[0047] Compared with existing technologies, the downward light distribution lens and lampshade of this utility model can guide more light towards the ground and reduce the light shining into the air, thereby effectively improving lighting efficiency, significantly reducing the intensity of light in the air, and reducing the negative impact of light pollution.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lower beam distribution lens, comprising a lens body, characterized in that, The lens body is provided with a light-concentrating part, which is integrally formed on the lens body. The light-concentrating part includes a light-concentrating wall and a total reflection wall. The exposed surface of the light-concentrating wall is curved. The total reflection wall is located above the light-concentrating wall and can reflect part of the light rays that are incident from inside the light-concentrating wall into the total reflection wall.

2. The lower beam distribution lens according to claim 1, characterized in that, A first groove is formed on one side wall of the light-concentrating wall.

3. A lower beam-distributing lens according to claim 2, characterized in that, The distance between the groove wall of the first groove and the outer wall of the light-concentrating wall gradually increases from the top to the bottom.

4. A lower beam-distributing lens according to claim 3, characterized in that, The first groove is rectangular or U-shaped.

5. A lower beam-distributing lens according to claim 2, characterized in that, The total reflection wall and the light-concentrating wall are connected, and a dual-differential-medium total reflection surface is provided on the end face of the total reflection wall away from the light-concentrating wall.

6. A lower beam-distributing lens according to claim 5, characterized in that, The cross-section of the total reflection wall is trapezoidal, and the length of the end face of the total reflection wall away from the light-concentrating wall is greater than the end face of the total reflection wall and the light-concentrating wall that are connected.

7. A lower beam-distributing lens according to claim 5, characterized in that, The total reflection wall has a second groove, and the lower wall of the second groove has a conical groove.

8. A lower beam-distributing lens according to claim 7, characterized in that, A light-transmitting wall is provided between the conical groove and the first groove.

9. A lower beam distribution lens according to claim 2, characterized in that, The lens body has a snap-fit ​​groove that communicates with the first groove.

10. A downward light distribution lampshade, comprising a lampshade body, characterized in that, The lampshade body is equipped with a plurality of lower light distribution lenses as described in any one of claims 1-9.

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