Small hill wall washing lamp lens

Abstract

The utility model discloses a small hill wall washing lamp lens which comprises a lens cup body, a light emitting groove is concavely formed in the front light emitting face of the lens cup body, a light inlet hole is concavely formed in the back light inlet face of the lens cup body, and the cup body side wall between the light emitting face and the light inlet face of the lens cup body is a free-form surface used for achieving total reflection. The annular light-emitting concave face and the middle light-emitting convex face are each provided with a light uniformizing bead face, the hole bottom of the light-in hole is a protruding light-in convex face, and a micro-structure light mixing circle group is formed on the light-in convex face. Therefore, by arranging the micro-structure light mixing circle group and the micro-structure light mixing array group, layering of a double-color-temperature light source can be avoided, wall washing light spots emitted by the small hill wall washing lamp lens are more uniform in light mixing, clear in edge cut-off line, free of layering and color separation, and more attractive in illumination.

Description

Technical Field

[0001] The utility model relates to the technical field of lamp lenses, in particular to a small hill wall washer lamp lens. Background Art

[0002] Nowadays, home decoration, hotels, museums, etc. are all paying more and more attention to the effect of lighting. The small hill wall washer lamp is more popular in the market because of its clean light spot similar to a small hill. COB light source has the advantages of high color rendering, high luminous efficiency, low thermal resistance, no light spot, energy saving and environmental protection. In some fields such as commercial lighting and exhibition hall lighting that have high requirements for lighting effects such as light spot, light color, and illumination, COB light source is generally used as the light source of lamps and lanterns with secondary optical design to meet lighting requirements. However, COB light source is divided into single color temperature chips with different color temperatures and dual color temperature dimming chips. Among them, dual color temperature dimmable chips have higher requirements for lens mixing.

[0003] At present, most of the hill wall wash lamp lenses on the market support single-color temperature light sources. For example, Chinese patent announcement No. CN218295581U discloses an anti-glare wall wash lens with an anti-glare cover. The lens in this solution will cause light color stratification and uneven light mixing when used on a dual-color temperature light source. Utility Model Content

[0004] The utility model aims to provide a small hill wall washer lamp lens, which can be used for a dual-color temperature light source and has the advantages of making the light spot non-stratified and non-color-separated, and making the lighting more beautiful.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A small hill wall washer lamp lens, comprising a lens cup body, a front light emitting surface of the lens cup body having a light emitting groove, a back light incident surface having a light incident hole, and a side wall of the lens cup body between the light emitting surface and the light incident surface being a free-form surface for realizing total reflection; the light emitting groove comprises a centrally protruding middle light emitting convex surface, and an annular light emitting concave surface arranged around the outside of the middle light emitting convex surface;

[0007] The annular light-emitting concave surface and the middle light-emitting convex surface are both formed with light-homogenizing pearl surfaces;

[0008] The bottom of the light entrance hole is a raised light entrance convex surface, on which a microstructure light mixing circle group is formed. The microstructure light mixing circle group includes a plurality of concentric circle-shaped convex surfaces that are centrally nested and densely distributed in the central area of ​​the light entrance convex surface.

[0009] Furthermore, a microstructure light mixing array group is formed on the hole wall of the light incident hole, and the microstructure light mixing array group includes a plurality of strip-shaped convex surfaces extending along the axial direction of the light incident hole, and the strip-shaped convex surfaces are densely distributed circumferentially around the axis of the light incident hole.

[0010] Furthermore, the hole wall of the light entrance hole is formed by rotation using a gradient curve technology, and the opening diameter of the light entrance hole is larger than the hole bottom diameter.

[0011] Furthermore, the concave surface of the annular light-emitting concave surface is an arc surface, and the annular light-emitting concave surface cooperates with the free-curved surface of the side wall of the cup body to design different light-emitting angles.

[0012] Furthermore, the light-averaging bead surface of the annular light-emitting concave surface is a Fermat spiral bead surface, and the light-averaging bead surface of the middle light-emitting convex surface is a Fermat spiral bead surface.

[0013] Furthermore, the light-averaging bead surface of the annular light-emitting concave surface is a hexagonal compound eye bead surface, and the light-averaging bead surface of the middle light-emitting convex surface is a Fermat spiral bead surface.

[0014] Furthermore, a radially protruding annular clamping edge is provided on one side of the side wall of the cup body close to the front; the annular clamping edge is arranged on the outside of the annular light-emitting concave surface; a Fermat spiral bead surface is also formed on the inner side of the front of the annular clamping edge, and the outer side of the front of the annular clamping edge is an annular plane.

[0015] Furthermore, a circle of mounting ridges surrounding the lens cup body protrudes from the bottom of the annular clamping edge.

[0016] After adopting the above technical solution, the lens can be set under the anti-glare cover, and part of the light emitted by the lens will be intercepted by the anti-glare cover, forming a small hill wall-washing light spot with clear boundaries. By setting up a micro-structured light mixing circle group, the stratification of the dual-color temperature light source can be avoided, so that the wall-washing light spot emitted by the large-angle small hill wall-washing lamp lens is more evenly mixed, with clear edge cutoff lines, no stratification, and no color separation, making the lighting more beautiful.

[0017] Furthermore, adding a microstructure light mixing array group can further improve the light mixing effect and be more suitable for the requirements of large-angle (36 degree and 50 degree) lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front perspective view of embodiment 1 of the utility model;

[0019] Figure 2 It is a front view of embodiment 1 of the utility model;

[0020] Figure 3 for Figure 2 Sectional view at AA;

[0021] Figure 4 It is a back perspective view of embodiment 1 of the present utility model;

[0022] Figure 5 It is a back view of embodiment 1 of the utility model;

[0023] Figure 6 This is a schematic diagram of a wall-washing light spot of Example 1 of the utility model;

[0024] Figure 7 It is a front perspective view of embodiment 2 of the present utility model;

[0025] Figure 8 It is a rear perspective view of embodiment 2 of the present utility model;

[0026] Fig. 9 It is a cross-sectional view of embodiment 2 of the utility model;

[0027] Fig.10 This is a schematic diagram of the wall washing light spot of Example 2 of the utility model;.

[0028] Explanation of reference numerals: lens cup body 10, light output groove 1, middle light output convex surface 11, annular light output concave surface 12, light input hole 2, light input convex surface 21, hole wall 22, cup body side wall 3, annular clamping edge 4, annular plane 41, mounting convex strip 42, Fermat spiral bead surface a, microstructure light mixing circle group b, circular convex surface b1, microstructure light mixing array group c, strip convex surface c1, hexagonal compound eye bead surface d. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Example 1

[0031] like Figures 1 to 5 As shown, a small hill wall washer lamp lens of the utility model comprises a lens cup body 10, the front light emitting surface of the lens cup body 10 is concavely provided with a light emitting groove 1, the back light incident surface is concavely provided with a light incident hole 2, and the cup side wall 3 between the light emitting surface and the light incident surface of the lens cup body 10 is a free-form surface for realizing total reflection; the free-form surface is formed by rotating a free curve, and the curvature of the free curve is obtained according to software simulation optimization so as to be used for total reflection of light.

[0032] The light emitting groove 1 comprises a centrally protruding middle light emitting convex surface 11 and an annular light emitting concave surface 12 arranged outside the middle light emitting convex surface 11 .

[0033] The annular light emitting concave surface 12 and the middle light emitting convex surface 11 are both formed with light-evening bead surfaces for light-evening treatment. Specifically, the annular light emitting concave surface 12 forms a Fermat spiral bead surface a for light-evening treatment, so that the light spot after refraction through the lens is more uniform and has no yellow spots; and the middle light emitting convex surface 11 also forms a Fermat spiral bead surface a for secondary light-evening treatment of the light (secondary light-evening means that the light that has been previously evenly treated is evenly treated again), which can also make the light spot after refraction through the lens more uniform and has no yellow spots.

[0034] In the present embodiment, the bottom of the light entrance hole 2 is a raised light entrance convex surface 21, and a microstructure light mixing circle group b is formed on the light entrance convex surface 21, and the microstructure light mixing circle group b includes a number of concentric circular convex surfaces b1 centered and nested inside and outside and densely distributed in the central area of ​​the light entrance convex surface 21; thereby, the light entering from the bottom of the light entrance hole 2 can obtain a mixing light; at the same time, a microstructure light mixing array group c is formed on the hole wall 22 of the light entrance hole 2, and the microstructure light mixing array group c includes a number of strip convex surfaces c1 extending along the axial direction of the light entrance hole 2, and each strip convex surface c1 is densely distributed circumferentially around the axis of the light entrance hole 2, so that the light entering from the hole wall 22 can obtain a mixing light here, so as to meet the requirements of large angles.

[0035] Thus, the lens of this embodiment can be disposed below the anti-glare cover (not shown). For example, part of the light in the figure is intercepted by the anti-glare cover, forming a small hill wall-washing light spot with clear boundaries (refer to the prior art). Figure 6 , using the above structure, by setting the microstructure mixing circle group b and the microstructure mixing array group c, the stratification of the dual color temperature light source can be avoided, so that the wall washing light spot emitted by the large-angle small hill wall washing lamp lens is more evenly mixed, the edge cutoff line is clear, there is no stratification, no color separation, and the lighting is more beautiful.

[0036] In this embodiment, the hole wall 22 of the light entrance hole 2 is formed by rotating using a gradient curve technology, and the opening diameter of the light entrance hole 2 is larger than the hole bottom diameter. The hole wall 22 is generated using a gradient curve technology, which is different from the traditional broken line structure, and can expand the diameter of the light entrance hole 2 and reduce stray light reflected from the interface.

[0037] like Figure 3 As shown, the concave surface of the annular light-emitting concave surface 12 is an arc surface, and the annular light-emitting concave surface 12 cooperates with the free curved surface of the cup body side wall 3 to design different light-emitting angles. For example, the wall washing scheme of this embodiment is more suitable for small hill wall washing with lens light-emitting angles of large angles of 36 degrees and 50 degrees.

[0038] In this embodiment, a radially protruding annular clamping edge 4 is provided on one side of the cup body side wall 3 close to the front; the annular clamping edge 4 is arranged on the outside of the annular light-emitting concave surface 12; a Fermat spiral bead surface a is also formed on the inner side of the front of the annular clamping edge 4, and the outer side of the front of the annular clamping edge 4 is an annular plane 41.

[0039] The bottom of the annular clamping edge 4 protrudes with a circle of mounting ridges 42 surrounding the lens cup body 10, so as to facilitate the installation of the lens.

[0040] Example 2

[0041] like Figures 7 to 10 As shown, the structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, the main difference is that the light output angle of the lens of this embodiment is designed to be a small angle of 15 degrees or 24 degrees, which can be referred to Fig. 9 As shown, the annular light-emitting concave surface 12 and the free-form surface of the cup body side wall 3 can be designed to cooperate to form a desired light-emitting angle.

[0042] Moreover, in the present embodiment, the annular light-emitting concave surface 12 forms a hexagonal compound eye bead surface d, which can also perform light averaging treatment on the light, so that the light spot after refraction through the lens is more uniform and has no yellow spots; and the intermediate light-emitting convex surface 11 also forms a Fermat spiral bead surface a to perform secondary light averaging treatment on the light, which can also make the light spot after refraction through the lens more uniform and has no yellow spots.

[0043] Also, see Fig.10 In this embodiment, since the light output angle is small, the microstructure light mixing array group c can be omitted, and only the microstructure light mixing circle group b is retained at the light entrance convex surface 21 of the light entrance hole 2. The hole wall 22 of the light entrance hole 2 adopts a smooth surface, which can avoid the stratification of the two-color temperature light source, and make the wall washing light spot emitted by the small-angle hill wall washing lamp lens more evenly mixed, with a clear edge cutoff line, no stratification, and no color separation, making the lighting more beautiful.

[0044] Of course, the small-angle lens can also be set in the microstructure light mixing array group c.

[0045] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

[0046] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0047] In the description of the present application, “multiple” and “several” mean two or more, unless otherwise clearly and specifically defined.

[0048] In addition, the present application provides examples of various specific processes and materials, but a person skilled in the art may be aware of the application of other processes and / or the use of other materials.

Claims

1. A small hill wall washer lamp lens, comprising a lens cup body, a front light-emitting surface of the lens cup body having a light-emitting groove, a back light-entering surface having a light-entering hole, and a side wall of the lens cup body between the light-emitting surface and the light-entering surface being a free-form surface for realizing total reflection; the light-emitting groove comprises a centrally protruding middle light-emitting convex surface, and an annular light-emitting concave surface arranged around the outside of the middle light-emitting convex surface; characterized in that: The annular light-emitting concave surface and the middle light-emitting convex surface are both formed with light-homogenizing pearl surfaces; The bottom of the light entrance hole is a raised light entrance convex surface, on which a microstructure light mixing circle group is formed. The microstructure light mixing circle group includes a plurality of concentric circle-shaped convex surfaces that are centrally nested and densely distributed in the central area of ​​the light entrance convex surface.

2. The small hill wall washer lamp lens according to claim 1, characterized in that: A microstructure light mixing array group is formed on the hole wall of the light incident hole. The microstructure light mixing array group includes a plurality of strip-shaped convex surfaces extending along the axial direction of the light incident hole. The strip-shaped convex surfaces are densely distributed circumferentially around the axis of the light incident hole.

3. The small hill wall washer lamp lens according to claim 1, characterized in that: The hole wall of the light entrance hole is formed by rotation using a gradient curve technology, and the opening diameter of the light entrance hole is larger than the hole bottom diameter.

4. The small hill wall washer lamp lens according to claim 1, characterized in that: The concave surface of the annular light-emitting concave surface is an arc surface, and the annular light-emitting concave surface cooperates with the free-curved surface of the side wall of the cup body to design different light-emitting angles.

5. The small hill wall washer lamp lens according to claim 1, characterized in that: The light-averaging bead surface of the annular light-emitting concave surface is a Fermat spiral bead surface, and the light-averaging bead surface of the middle light-emitting convex surface is a Fermat spiral bead surface.

6. The small hill wall washer lamp lens according to claim 1, characterized in that: The light-averaging bead surface of the annular light-emitting concave surface is a hexagonal compound eye bead surface, and the light-averaging bead surface of the middle light-emitting convex surface is a Fermat spiral bead surface.

7. The small hill wall washer lamp lens according to claim 1, characterized in that: The side wall of the cup body is radially protruded on one side close to the front side and is provided with an annular clamping edge; the annular clamping edge is arranged on the outside of the annular light-emitting concave surface; a Fermat spiral bead surface is also formed on the inside of the front side of the annular clamping edge, and the outside of the front side of the annular clamping edge is an annular plane.

8. The small hill wall washer lamp lens according to claim 7, characterized in that: The bottom of the annular clamping edge protrudes with a circle of mounting convex strips surrounding the lens cup body.

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