Light distribution structure and lighting device
By using cycloid lenses and light shielding components in the light distribution structure of the wall washing lamp, the problems of overflow and glare in the light distribution structure of the existing wall washing lamp are solved, and better anti-glare effect is achieved and the external structure of the lamp is simplified.
Patent Information
- Application Number
- CN202421813214.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The light distribution structure of existing wall washing lamps has problems of light overflow and glare, and anti-glare accessories usually occupy a large space and are prone to dirt.
A light distribution structure is designed, including a lens and a light shielding member. The lens is a cyclonic structure. The light shielding member is arranged in the middle of the light exit surface of the lens, and blocks direct light from the central part and absorbs stray light to achieve an anti-glare effect.
It effectively prevents excessive light intensity and stray light from the center part, reduces glare, and all optics are inside the lamp, avoiding the occupation and dirt of external anti-glare accessories.
Smart Images
Figure CN223004863U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a light distribution structure and a lamp including the light distribution structure. Background Art
[0002] As the name implies, a wall washer lamp is a lamp that makes the light wash over the wall like water and is used for building decorative lighting. The wall washer lamp projects its light onto the wall surface of a building to outline the contour of the building. Therefore, the light distribution of the wall washer lamp is usually a polarized structure. However, the light spot of a conventional polarized linear lamp is relatively large, stray light is likely to overflow, the glare is relatively large, and the anti-glare accessories are generally outside the lamp, occupying a large space and being easily soiled. Content of the Utility Model
[0003] The purpose of this application is to provide a light distribution structure and a lighting device with an anti-glare function.
[0004] To achieve the above effects, the technical solution adopted in this application is to provide a light distribution structure, including a light source and a light distribution component. It is characterized in that the light distribution component includes a lens. The lens is a gyrobody, including a top surface and a bottom surface that are axially opposite, and a side surface connecting the top surface and the bottom surface. The top surface is the light-emitting surface, and the bottom surface is recessed inward to form a light-incident cavity for setting the light source. The light-incident cavity includes a first light-incident surface opposite to the top surface and a second light-incident surface connecting the first light-incident surface and the bottom surface. The side surface is a reflecting surface. The light distribution component further includes a light-shielding member. The light-shielding member is arranged above the first light-incident surface. The light-shielding member can block the light from passing through. The projected area of the light-shielding member in the lens axis direction is larger than the projected area of the first light-incident surface in the lens axis direction.
[0005] Further, the light-shielding member includes a flat plate portion. The flat plate portion is arranged outside the light-emitting surface. The flat plate portion and the lens are coaxially arranged. At least part of the lens covered by the flat plate portion forms a convex lens structure.
[0006] Further, the light-emitting surface of the lens is recessed inward to form a mounting cavity. The light-shielding member further includes a mounting portion protruding from the flat plate portion toward the lens. The mounting portion is inserted into the mounting cavity. The cooperation between the mounting portion and the mounting cavity realizes the fixed connection between the light-shielding member and the lens.
[0007] Further, the mounting portion includes clamping claws. The number of the clamping claws is more than three. The clamping claws are circumferentially spaced along the shape of the inner side wall of the mounting cavity.
[0008] Further, the light-shielding member is black.
[0009] Further, the light distribution component further includes a grille plate disposed outside the light-emitting surface of the lens, and the grille plate forms an inclined angle with a plane perpendicular to the optical axis of the light source.
[0010] Further, an optical film is further disposed between the grille plate and the lens.
[0011] The present application further provides an illumination device, characterized in that: the illumination device includes a lamp body and the light distribution structure as described above disposed in the lamp body.
[0012] Further, the lamp body is strip-shaped, and a plurality of the light distribution structures are accommodated therein, and the light distribution structures are arranged along the length direction of the lamp body.
[0013] Further, the light distribution structure further includes a grille plate disposed outside the light-emitting surface of the lens, the lamp body includes a light source mounting surface, the light source mounting surface is inclined in the lamp body, and the grille plate is inclined relative to the light source mounting surface, and the two have the same inclination direction.
[0014] The light distribution structure provided by the present utility model prevents the light intensity of the direct light in the central part from being too large through the light-shielding member disposed at the middle position of the light-emitting surface of the lens, and at the same time absorbs the uncontrolled stray light in the central part, realizing the anti-glare effect. All optical devices are inside the lamp, which can achieve waterproof and dustproof, and the outer surface is easy to clean. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is an exploded view of the structure of an illumination device according to a preferred embodiment of the present utility model;
[0016] Figure 2 is Figure 1 a sectional view of the illumination device in the embodiment;
[0017] Figure 3 is Figure 1 a schematic structural view of the lens in the illumination device in the embodiment;
[0018] Figure 4 is Figure 3 a sectional view of the lens;
[0019] Figure 5 is Figure 1 a schematic structural view of the light-shielding member in the illumination device in the embodiment;
[0020] Figure 6 is Figure 6 a bottom view of the light-shielding member. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The following further describes in detail the light distribution structure and the illumination device proposed by the present utility model in conjunction with the accompanying drawings and specific embodiments.
[0022] The structure of a lighting device according to a preferred embodiment of the present application is as shown in Figure 1 , Figure 2 shown. The lighting device in this embodiment is a wall washer lamp, which includes a strip-shaped lamp body 5. The lamp body 5 and the light-transmitting panel 4 enclose a containing space. The substrate 3, the light source 2, and the light distribution component 1 are arranged inside the lamp body 5. Both ends of the lamp body 5 are closed by end caps 6. This lighting device is an outdoor lamp, and the lamp body 5 is electrically connected to the outside through a waterproof joint 8. The lamp body 5 is fixedly installed on an installation base such as the installation ground or wall through a rotating bracket 7, and the rotating bracket 7 can adjust the angle of the lamp body 5, thereby adjusting the light-emitting direction.
[0023] The light distribution structure provided by the embodiment includes a light source 2 and a light distribution component 1. The light distribution component 1 includes a lens 400, a light-shielding member 300, an optical film 200, and a grating 100. Among them, the lens 400 is the main light control element. As shown in Figure 3 , Figure 4 In this embodiment, the lens 400 has a gyroid structure, including a top surface 403 and a bottom surface 401 arranged oppositely along the axis, and a side surface 402 connecting the top surface 403 and the bottom surface 401. The top surface 403 is the light-emitting surface of the lens 400. The bottom surface 401 is recessed inward to form a light-incident cavity 405 for arranging the light source 2. The light-incident cavity 405 includes a first light-incident surface 4051 arranged oppositely to the top surface 403, and a second light-incident surface 4052 connecting the first light-incident surface 4051 and the bottom surface 401. The second light-incident surface 4052 surrounds the first light-incident surface 4051 to form the light-incident cavity 405, and the light source 2 is arranged therein. In this embodiment, the lens 400 is a TIR lens, and its side surface 402 is a total reflection surface. Part of the light rays emitted by the light source 2 enter the lens 400 through the second light-incident surface 4052, and then are reflected by the side surface 402 and emitted from the top surface 403. After light control, a collimated light beam is formed. In other preferred embodiments, light beams at other angles can also be formed, and the present application does not limit this. The central part of the light rays emitted by the light source 2 enters the lens 400 through the first light-incident surface 4051. Without obstruction, this part of the light rays will be directly emitted without reflection, which will cause the light intensity of the central part to be too high. At the same time, there will always be some uncontrolled stray light during the reflection process, and these light rays will also concentrate towards the center, resulting in glare.
[0024] To solve the glare problem, a light-shielding member 300 is added to the light distribution component 1 in this embodiment, and its structure is as shown in Figure 5 , Figure 6As shown in the figure. The light-shielding member 300 includes a flat plate portion 301 and a mounting portion 302 extending outward from one surface of the flat plate portion 301. The flat plate portion 301 is the main light-shielding part, made of light-impermeable material, and is disposed outside the top surface 401 which serves as the light-emitting surface. In this embodiment, the lens 400 is a toroidal lens, the top surface 401 is circular, and the shape of the flat plate portion 301 is also circular and coaxially arranged with the lens 400. Thus, the flat plate portion 301 is located above the first light-incident surface 4051, and the projected area of the flat plate portion 301 in the axial direction of the lens 400 is larger than the projected area of the first light-incident surface 4051 in the axial direction of the lens 400. The light emitted from the central part of the light source 2 enters the lens 400 through the first light-incident surface 4051 and is blocked by the flat plate portion 301 after being emitted. In order to limit all the light entering through the first light-incident surface 4051 within the coverage of the flat plate portion 301, in this embodiment, the first light-incident surface 4051 is designed for light control. The first light-incident surface 4051 is a curved surface protruding outward from the lens 400, actually forming a convex lens to converge the light beam. In other embodiments, the first light-incident surface 4051 can also be a flat surface, while the bottom of the mounting cavity 404 is a curved surface to form a convex lens, so as to control the central part of the light beam and prevent it from exceeding the coverage of the flat plate portion 301.
[0025] To fix the light-shielding member 300, a mounting cavity 404 is formed by recessing the top surface 401 of the lens 400 inwardly. The mounting portion 302 protrudes from one side surface of the flat plate portion 301 and is inserted into the mounting cavity 404. The light-shielding member 300 and the lens 400 are fixedly connected through the cooperation of the mounting portion 302 and the mounting cavity 404. The mounting cavity 404 is a columnar groove, and the mounting portion 302 can be a columnar body with a contour consistent with that of the mounting cavity 404, and the two are connected through interference fit. At this time, the mounting portion 302 extends inwardly toward the lens 400, and its side surface can also absorb stray light that is not controlled in the central part of the light distribution system. The solid column will generate reflection on the end face facing the light source 2, causing the light in the central part to enter the lens 400 again. Therefore, the mounting portion 302 can be a cylindrical structure with an outer contour consistent with that of the mounting cavity 404, and the light in the central part will enter the inside of the cylindrical structure and be absorbed through multiple reflections and will no longer enter the lens 400. However, there is still a problem of difficult installation for the cylindrical mounting portion 302. Since the mounting portion 302 and the mounting cavity 404 are in interference fit, there will be an obstruction during insertion. Therefore, a plurality of openings can be formed circumferentially on the wall surface of the cylindrical structure to form several clamping claws. In this embodiment, the number of clamping claws is 3. In other embodiments, the number of clamping claws can be more than 3, and the present application does not limit this. The clamping claws are arranged circumferentially, and the outer contour formed by their enclosure is the same as the shape of the inner side wall of the mounting cavity 404. Since there is a gap between the clamping claws during insertion, the clamping claws can deform inwardly. When the clamping claws serving as the mounting portion 302 are pushed into the mounting cavity 404, the clamping claws form a lateral pressure on the inner side wall of the mounting cavity 404 to achieve abutment and prevent the light-shielding member 300 from disengaging from the mounting cavity 404.
[0026] To improve the absorption rate of stray light, the light-shielding member 300 is black. Specifically, the light-shielding member 300 itself can be made of a black light-absorbing material, such as a black injection-molded part. In this embodiment, the flat plate portion 301 and the mounting portion 302 of the light-shielding member 300 are integrally injection-molded from a black material. In other preferred embodiments, the light-shielding member 300 may not be entirely black, but only a black light-absorbing material layer may be provided on the side of the flat plate portion 301 close to the light source, or spraying may be performed on the surface.
[0027] The lens 400 needs to be positioned above the light source 2. Therefore, the light distribution structure provided in this embodiment further includes a lens bracket 500. The lens bracket 500 is cylindrical, and its diameter is comparable to that of the lens 400, and the lens 400 is arranged therein. One end of the lens bracket 500 is arranged on the substrate 3, and a positioning notch is arranged at the other end. A positioning protrusion 406 is arranged outside the top surface 403 of the lens 400. The positioning protrusion 406 and the positioning notch cooperate to limit the circumferential rotation of the lens 400. At the same time, the lens bracket 500 and the lens 400 are of the same height, that is, the outside of the side wall 402 of the lens 400 is completely surrounded by the lens bracket 500. The lens bracket 500 is made of light-blocking material, which can prevent the lateral stray light of the lens 400 from leaking out.
[0028] After the light emitted by the light source 2 is collimated by the lens 400, in order to further prevent glare, a grille plate 100 is further arranged outside the light-emitting surface of the lens 400. This embodiment is a wall washer light, the lamp body 5 is strip-shaped, the light sources 2 are arranged along the length direction of the lamp body, and the lenses 400 and the light sources 2 are arranged in one-to-one correspondence. Therefore, the light distribution structure 1 is also arranged along the length direction of the lamp body 5. The grille plate 100 is an integral long strip, and an optical film 200 is further arranged on the side of the grille plate 100 facing the lens 400. After the light collimated by the lens 400 is longitudinally stretched and mixed in color by the optical film 200, it is filtered again by the grille plate 100, and the stray light will be absorbed by the grille plate 100 and finally emitted through the light-transmitting panel 4.
[0029] For the wall washer light, usually the emitted light needs to be deflected to one side. Therefore, the light source 2 is inclinedly arranged in the lamp body 5. Specifically, the lamp body is provided with an inclined light source mounting surface 51, and the light source 2 is mounted on the light source mounting surface 51 through the substrate 3. At the same time, for the light distribution structure 2, the optical axes of the lens 400, the light-shielding member 300 and the light source 2 coincide, and the grille plate 100 is inclined relative to the light source mounting surface 51, that is, the grille plate 100 forms an inclined angle with the plane perpendicular to the optical axis of the light source 2. Both the grille plate 100 and the light source mounting surface 51 are inclined relative to the mounting plane of the wall washer light, and they have the same inclination direction but different inclination angles. The inclined arrangement of the light source mounting surface 51 enables the light-emitting direction of the lighting device in the embodiment to have a certain deflection to achieve the wall-washing effect. The inclined arrangement of the grille plate 100 relative to the light source mounting surface 51 can obtain a better anti-glare effect.
[0030] The above description of the preferred embodiments of the present application is for the purpose of illustration and description, and is not intended to exhaust or limit the present application to the specific forms disclosed. Obviously, many modifications and changes may be made, and these modifications and changes may be obvious to those skilled in the art and should be included within the scope of the present application defined by the appended claims.
Claims
1. A light distribution structure, comprising a light source and a light distribution component, characterized in that: The light distribution component includes a lens, which is a gyroscope, including a top surface and a bottom surface arranged opposite to each other in the axial direction, and a side surface connecting the top surface and the bottom surface, the top surface is a light emitting surface, and the bottom surface is recessed toward the inner side of the lens to form a light incident cavity for setting the light source, the light incident cavity includes a first light incident surface arranged opposite to the top surface, a second light incident surface connecting the first light incident surface and the bottom surface, and the side surface is a reflecting surface, and the light distribution component also includes a light shielding member, which is arranged above the first light incident surface, and can block light from passing through, and the projection area of the light shielding member in the direction of the lens axis is larger than the projection area of the first light incident surface in the direction of the lens axis.
2. The light distribution structure according to claim 1, characterized in that: The shading member includes a flat plate portion, the flat plate portion is arranged outside the light emitting surface, the flat plate portion and the lens are arranged coaxially, and the lens covered by the flat plate portion at least partially forms a convex lens structure.
3. The light distribution structure according to claim 2, characterized in that: The light-emitting surface of the lens is recessed toward the inner side of the lens to form a mounting cavity. The shading member also includes a mounting portion protruding from the flat portion toward the lens. The mounting portion is inserted into the mounting cavity. The mounting portion and the mounting cavity cooperate to achieve a fixed connection between the shading member and the lens.
4. The light distribution structure according to claim 3, characterized in that: The mounting portion includes claws, the number of the claws is more than three, and the claws are arranged at intervals in the circumferential direction along the inner side wall shape of the mounting cavity.
5. The light distribution structure according to any one of claims 1 to 4, characterized in that: The shading element is black.
6. The light distribution structure according to claim 5, characterized in that: The light distribution component further includes a grid plate arranged outside the light emitting surface of the lens, and the grid plate forms an inclined angle with a plane perpendicular to the optical axis of the light source.
7. The light distribution structure according to claim 6, characterized in that: An optical film is also arranged between the grid plate and the lens.
8. A lighting device, characterized in that: The lighting device comprises a lamp body and a light distribution structure as claimed in any one of claims 1 to 7 arranged in the lamp body.
9. The lighting device according to claim 8, characterized in that: The lamp body is in a strip shape, and contains a plurality of the light distribution structures, which are arranged along the length direction of the lamp body.
10. The lighting device according to claim 9, characterized in that: The light distribution structure also includes a grid plate arranged outside the light emitting surface of the lens, the lamp body includes a light source mounting surface, the light source mounting surface is tilted in the lamp body, and the grid plate is tilted relative to the light source mounting surface, and the two are tilted in the same direction.