Lens structure for lamp and lamp
By designing the lens structure with an elliptical light-entry surface and a concentric arc surface structure, the problem of unreasonable light energy distribution in the lamp lens structure is solved, and the uniform distribution and uniform lighting effect of the lamp light is achieved.
Patent Information
- Application Number
- CN202422411789.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-30
AI Technical Summary
The existing lamp lens structure has unreasonable light energy distribution, resulting in insufficient illumination in the center of the lamp, dark center, and poor lighting effect.
A lens structure for lamps is designed, using an elliptical light-entry surface and a concentric first and second arc surfaces, reasonably planning the shape and size of the light-entry surface and the light-exit surface to ensure that the light is properly distributed in the lens structure, output an elliptical light spot, and increase the central light energy distribution.
By reasonably distributing light energy, avoiding dark centers, ensuring the uniformity of light distribution and luminous uniformity of lamps, and improving lighting effects.
Smart Images
Figure CN223076805U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lighting equipment, and more specifically, to a lens structure for a lamp and a lamp. Background Art
[0002] A lamp is a device for lighting, and the lens structure therein is used to change the characteristics of the light beam emitted by the light source, such as its directivity, angle, and intensity distribution, to meet the requirements of specific lighting scenarios. Among them, the light source can be a lamp bead, an LED lamp bead, a laser light source, etc. Different types of lens structures can be used to achieve different light beam characteristics. Each lens structure can achieve specific light refraction, reflection, divergence, or aggregation characteristics due to its specific geometric features. However, there are some problems and limitations in the existing lens structures during use. For example, the lens structure currently applied in lamps is usually a light distribution lens with a circular light spot. When this lens structure is used, due to the unreasonable distribution of light energy, the central illuminance of the lamp is insufficient, and it is easy to generate a dark center, resulting in poor lighting effects. Therefore, the improvement and optimization of the lens structure to improve its optical performance and applicability is still a direction worthy of exploration.
[0003] That is to say, there is a problem of unreasonable light energy distribution in the lens structure for lamps in the prior art. Summary of the Utility Model
[0004] The main purpose of the present utility model is to provide a lens structure for a lamp and a lamp to solve the problem of unreasonable light energy distribution in the lens structure for lamps in the prior art.
[0005] To achieve the above object, according to one aspect of the present utility model, there is provided a lens structure for a lamp, including a body having a first accommodation cavity, a light incident surface, and a light exit surface. The first accommodation cavity is located on the light incident side of the body and bulges towards the direction close to the light exit surface. The cavity wall surface of the first accommodation cavity is the light incident surface, and the projection of the light incident surface on the light incident side is an ellipse, and the ratio of the length of the major axis of the ellipse to the length of the minor axis of the ellipse is greater than or equal to 1.5 and less than or equal to 2.
[0006] Further, the light incident surface is a part of the surface of an ellipsoid.
[0007] Further, the light incident surface is a curved surface, and the radius of curvature of the curved surface is greater than or equal to 0.2 mm and less than or equal to 20 mm.
[0008] Further, the ratio of the height of the first accommodation cavity on the central axis of the body to the length of the major axis of the ellipse is greater than or equal to 0.4 and less than or equal to 0.6; and / or the ratio of the height of the first accommodation cavity on the central axis of the body to the length of the minor axis of the ellipse is greater than or equal to 0.7 and less than or equal to 0.9.
[0009] Further, the light-emitting surface includes a first arc surface and a second arc surface that are concentrically arranged. The second arc surface is located on the outer peripheral side of the first arc surface. The first arc surface is conical, and the apex of the conical first arc surface is closer to the light-incident side than the bottom of the cone. The second arc surface bulges in a direction away from the light-incident surface.
[0010] Further, the apex of the first arc surface is located on the central axis of the body. The distance between the apex of the first arc surface and the bottom of the first arc surface on the central axis of the body is less than the distance between the apex of the first arc surface and the light-incident surface on the central axis of the body.
[0011] Further, the distance between the apex of the first arc surface and the light-incident surface on the central axis of the body is greater than or equal to 2 mm and less than or equal to 2.5 mm; and / or the radius of curvature of the first arc surface is greater than or equal to 0.3 mm and less than or equal to 1 mm, and the radius of curvature of the second arc surface is greater than or equal to 1 mm and less than or equal to 30 mm.
[0012] Further, the ratio of the projected area of the first arc surface on the light-incident side to the projected area of the second arc surface on the light-incident side is greater than or equal to 8% and less than or equal to 12%.
[0013] Further, the light-emitting beam angle of the lens structure in the first direction is different from the light-emitting beam angle of the lens structure in the second direction. The first direction is perpendicular to the second direction. The light-emitting beam angle of the lens structure in the first direction is greater than or equal to 170° and less than or equal to 180°; and / or the light-emitting beam angle of the lens structure in the second direction is greater than or equal to 120° and less than or equal to 150°.
[0014] Further, the body further includes a second accommodation cavity and a circumferential flange structure. The first accommodation cavity communicates with the external space of the body through the second accommodation cavity. The surface of the circumferential flange structure on the side facing away from the light-emitting surface is flush with the end surface of the light-incident side of the body.
[0015] According to another aspect of the present invention, there is provided a lighting fixture, including: a lamp board; a light source, where there are multiple light sources, and the multiple light sources are arranged in an array on the lamp board, and at least part of the light sources are covered with the above-mentioned lens structure.
[0016] Applying the technical solution of the present invention, the lens structure for a lighting fixture includes a body. The body has a first accommodation cavity, a light-incident surface, and a light-emitting surface. The first accommodation cavity is located on the light-incident side of the body and bulges in a direction close to the light-emitting surface. The cavity wall surface of the first accommodation cavity is the light-incident surface. The projection of the light-incident surface on the light-incident side is elliptical, and the ratio of the length of the major axis of the ellipse to the length of the minor axis of the ellipse is greater than or equal to 1.5 and less than or equal to 2.
[0017] The body has a first accommodation cavity, and the cavity wall surface of the first accommodation cavity is the light incident surface, so that the first accommodation cavity provides an accommodation space for the subsequent light source, enabling the light emitted by the light source to enter the lens structure through the light incident surface and then exit through the light exit surface, realizing the reasonable distribution of light, thus ensuring the reliability of the use of the lens structure. By setting the projection of the light incident surface on the light incident side to be elliptical, and planning the ratio between the length of the major axis of the ellipse and the length of the minor axis of the ellipse to be greater than or equal to 1.5 and less than or equal to 2, the shape of the light incident surface is planned, and then the shape of the first accommodation cavity is planned, so that the light emitted by the light source can realize the redistribution of light energy after passing through the light incident surface, and then output an elliptical light spot, enabling more energy to be distributed to the center of the lamp, ensuring the rationality of the light energy distribution, thus avoiding the problem of a dark center, being conducive to ensuring the uniformity of light distribution and the luminous uniformity of the lamp. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:
[0019] Figure 1 shows a schematic structural diagram of a lens structure of an alternative embodiment of the present utility model from one angle;
[0020] Figure 2 shows Figure 1 a schematic structural diagram of the lens structure in
[0021] Figure 3 shows Figure 1 a cross-sectional view of the lens structure in
[0022] Figure 4 shows Figure 1 a cross-sectional view of the lens structure in the major axis direction of the light incident surface;
[0023] Figure 5 shows Figure 1 a light distribution curve diagram of the lens structure in
[0024] Figure 6 shows Figure 1 a light spot diagram of the lens structure in
[0025] Figure 7 shows Figure 1 a light path diagram of the lens structure in the minor axis direction of the light incident surface;
[0026] Figure 8 shows Figure 1 a light path diagram of the lens structure in the major axis direction of the light incident surface;
[0027] Figure 9 Shows a schematic structural diagram of a lamp sticker of a lamp in an alternative embodiment of the present utility model;
[0028] Figure 10 Shows a schematic structural diagram of a lamp in an alternative embodiment of the present utility model;
[0029] Figure 11 Shows an illuminance diagram of a lamp in the prior art;
[0030] Figure 12 Shows Figure 10 the illuminance diagram of the lamp in
[0031] Among them, the above-mentioned drawings include the following reference numerals:
[0032] 100, lens structure; 10, first accommodation cavity; 11, light incident surface; 20, light exit surface; 21, first arc surface; 22, second arc surface; 30, second accommodation cavity; 40, circumferential flange structure; 50, central axis; 200, lamp board; 300, lamp cover. Detailed implementation manners
[0033] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.
[0034] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.
[0035] In the present utility model, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are generally in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction of the component itself; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation terms do not limit the present utility model.
[0036] In order to solve the problem of unreasonable light energy distribution existing in the lens structure for lamps in the prior art, the present utility model provides a lens structure and a lamp for lamps.
[0037] Such as Figures 1 to 12As shown in the figure, the lens structure 100 for a lighting fixture includes a body. The body has a first accommodation cavity 10, a light incident surface 11, and a light exit surface 20. The first accommodation cavity 10 is located on the light incident side of the body and bulges towards the direction close to the light exit surface 20. The cavity wall surface of the first accommodation cavity 10 is the light incident surface 11. The projection of the light incident surface 11 on the light incident side is elliptical, and the ratio of the major axis length to the minor axis length of the ellipse is greater than or equal to 1.5 and less than or equal to 2.
[0038] The body has a first accommodation cavity 10, and the cavity wall surface of the first accommodation cavity 10 is the light incident surface 11, so that the first accommodation cavity 10 provides an accommodation space for the subsequent light source. The light emitted by the light source enters the lens structure 100 through the light incident surface 11 and then exits through the light exit surface 20, realizing the reasonable distribution of light, thereby ensuring the use reliability of the lens structure 100. By setting the projection of the light incident surface 11 on the light incident side to be elliptical and planning that the ratio of the major axis length to the minor axis length of the ellipse is greater than or equal to 1.5 and less than or equal to 2, the shape of the light incident surface 11 is planned, and then the shape of the first accommodation cavity 10 is planned, so that the light energy can be redistributed after the light emitted by the light source passes through the light incident surface 11, and then an elliptical light spot is output, so that more energy is distributed to the center of the lighting fixture, ensuring the rationality of the light energy distribution, thereby avoiding the problem of a dark center, being beneficial to ensuring the uniformity of light distribution, and ensuring the uniform light emission of the lighting fixture.
[0039] As Figures 2 to 4 shown, the light incident surface 11 is a continuous surface. Specifically, the light incident surface 11 is a part of the surface of an ellipsoid. Figure 3 and Figure 4 respectively show the cross-sectional views of the lens structure 100 in the minor axis direction and the major axis direction of the light incident surface 11. In an alternative embodiment of the present application, the light incident surface 11 is half of the surface of an ellipsoid. Of course, it can also be set according to actual situations. Such a setting enables the light trend after the light passes through the light incident surface 11 to be redistributed. On the premise of ensuring the central brightness, the emitted light is fully diffused, and finally an elliptical light spot with a uniform energy distribution is obtained.
[0040] Specifically, the light incident surface 11 is a curved surface, and the radius of curvature of the curved surface is greater than or equal to 0.2 mm and less than or equal to 20 mm. By reasonably planning the radius of curvature of the light incident surface 11, it is beneficial to control the deflection angle of the light passing through the light incident surface 11, beneficial to ensuring the light diffusion effect, and ensuring the illuminance uniformity of the emitted light spot.
[0041] Specifically, the central axis of the first accommodating cavity 10 coincides with the central axis 50 of the main body, and the ratio between the height of the first accommodating cavity 10 on the central axis 50 of the main body and the length of the major axis of the ellipse is greater than or equal to 0.4 and less than or equal to 0.6; the ratio between the height of the first accommodating cavity 10 on the central axis 50 of the main body and the length of the minor axis of the ellipse is greater than or equal to 0.7 and less than or equal to 0.9. It should be noted that the ellipse here is the projection shape of the above-mentioned light incident surface 11 on the light incident side. By reasonably constraining the relationship between the height of the first accommodating cavity 10 and the major axis and minor axis of the ellipse, it is helpful to constrain the size of the first accommodating cavity 10, and to ensure the rationality of the size of the first accommodating cavity 10, so that the first accommodating cavity 10 can adapt to a variety of types of light sources, thereby ensuring sufficient divergence of the light of the light source accommodated therein, and ensuring the uniformity of light output.
[0042] like Figure 1 , Figure 3 and Figure 4 As shown, the light emitting surface 20 is arranged opposite to the light incident surface 11, and the light emitting surface 20 covers the light incident surface 11. The light emitting surface 20 includes a first curved surface 21 and a second curved surface 22 which are arranged concentrically. Specifically, the light emitting surface 20 is composed of the first curved surface 21 and the second curved surface 22. The first curved surface 21 is located at the center of the lens structure 100, and the second curved surface 22 is located at the outer peripheral side of the first curved surface 21. The first curved surface 21 and the second curved surface 22 are smoothly transitioned and connected. The first curved surface 21 is conical, and the top of the conical first curved surface 21 is close to the light incident side relative to the bottom of the cone, and the second curved surface 22 is raised in the direction away from the light incident surface 11. This arrangement enables the center of the light emitting surface 20 to be concave toward the light incident side, and the outer peripheral part of the light emitting surface 20 is raised outward. This arrangement is conducive to the light emitting surface 20 to stably receive the light emitted from the light incident surface 11, thereby ensuring the stability of the light output, and further ensuring the uniformity of light diffusion and the rationality of light energy distribution. Reference Figure 1 It can be seen from the figure that the entire light emitting surface 20 can be formed by rotating a cross section of the light emitting surface 20 along a direction parallel to the central axis 50 of the body 360° around the central axis 50 .
[0043] Specifically, the cone top of the first arc surface 21 is located on the central axis 50 of the body, and the distance between the cone top of the first arc surface 21 and the cone bottom of the first arc surface 21 on the central axis 50 of the body is smaller than the distance between the cone top of the first arc surface 21 and the light incident surface 11 on the central axis 50 of the body. In other words, the concave depth of the first arc surface 21 is small, and at the same time, the thickness of the body on the central axis 50 can be ensured to be within a reasonable range, which is beneficial to ensure the structural strength of the body on the one hand, and on the other hand, it is beneficial to ensure that the body can provide enough space to fully diffuse the light emitted by the light source.
[0044] In an embodiment of the present application, the distance between the apex of the first arc surface 21 and the light incident surface 11 on the central axis 50 of the body is greater than or equal to 2 mm and less than or equal to 2.5 mm. By reasonably restricting this distance, the thickness of the body in the direction of the central axis 50 is controlled, ensuring the structural stability of the body. At the same time, space is provided for the passage of light, ensuring the stability of the light transmission path.
[0045] Specifically, the radius of curvature of the first arc surface 21 is greater than or equal to 0.3 mm and less than or equal to 1 mm, and the radius of curvature of the second arc surface 22 is greater than or equal to 1 mm and less than or equal to 30 mm. By reasonably restricting the range of the radius of curvature of the first arc surface 21 and the second arc surface 22, it is beneficial to plan the bending degree of the first arc surface 21 and the second arc surface 22, and then plan the deflection angle of the light passing through the first arc surface 21 and the second arc surface 22, ensuring the illumination uniformity of the finally output elliptical light spot.
[0046] In an alternative embodiment of the present application, the ratio of the projected area of the first arc surface 21 on the light incident side to the projected area of the second arc surface 22 on the light incident side is greater than or equal to 8% and less than or equal to 12%. Specifically, the projection of the first arc surface 21 on the light incident side is within the projection of the light incident surface 11 on the light incident side. The projected area of the first arc surface 21 on the light incident side is smaller than the projected area of the second arc surface 22 on the light incident side. The projected area of the light exit surface 20 on the light incident side is larger than the projected area of the light incident surface 11 on the light incident side, and the projection of the light exit surface 20 on the light incident side completely covers the projection of the light incident surface 11 on the light incident side. Such a setting is beneficial to reasonably plan the size of the first arc surface 21, beneficial to avoiding the situation where the first arc surface 21 is too large, and at the same time can ensure that the second arc surface 22 is large enough to ensure that the second arc surface 22 can stably receive the diffused light emitted from the light incident surface 11, realizing the further diffusion of light, and ensuring the energy uniformity of the finally output elliptical light spot.
[0047] As Figures 5 to 8 shown, Figure 5 shows the light distribution curve of the lens structure 100 of the present application. It can be seen from the figure the elliptical light distribution energy distribution, and the light distribution curve is no longer rotationally symmetric. Figure 6 shows the elliptical light spot output by the lens structure 100. A light source is placed in the first accommodation cavity 10, and after the light emitted by the light source passes through the lens structure 100, an elliptical light spot is output.
[0048] Figure 7 and Figure 8The optical path diagrams of the lens structure 100 in the short-axis direction and the long-axis direction of the above ellipse are respectively shown. The exit beam angle of the lens structure 100 in the first direction is different from the exit beam angle of the lens structure 100 in the second direction, and the first direction is perpendicular to the second direction. The exit beam angle of the lens structure 100 in the first direction is greater than or equal to 170° and less than or equal to 180°; the exit beam angle of the lens structure 100 in the second direction is greater than or equal to 120° and less than or equal to 150°. Specifically, the first direction is the short-axis direction of the projection shape of the above light incident surface 11 on the light incident side, and the second direction is the long-axis direction of the projection shape of the above light incident surface 11 on the light incident side. That is to say, the short-axis direction of the light incident surface 11 corresponds to the long-axis direction of the elliptical light spot, and the exit beam angle of the light incident surface 11 in the short-axis direction is greater than or equal to 170° and less than or equal to 180°. The light diffusion degree of the light incident surface 11 in the long-axis direction is not as high as that of the light incident surface 11 in the short-axis direction. The long-axis direction of the light incident surface 11 corresponds to the short-axis direction of the elliptical light spot, and the exit beam angle of the light incident surface 11 in the long-axis direction is greater than or equal to 120° and less than or equal to 150°.
[0049] As Figures 1 to 4 shown, the body further includes a second accommodation cavity 30 and a circumferential flange structure 40. The first accommodation cavity 10 communicates with the external space of the body through the second accommodation cavity 30. One side of the second accommodation cavity 30 communicates with the first accommodation cavity 10, and the other side of the second accommodation cavity 30 extends to the end face of the light incident side of the body, so that the second accommodation cavity 30 can provide an accommodation space for the substrate of the light source. The surface of the circumferential flange structure 40 on the side away from the light exit surface 20 is flush with the end face of the light incident side of the body. The light exit surface 20 is connected to the end face of the light incident side of the body through the circumferential flange structure 40. By providing the circumferential flange structure 40, it is convenient for the installation and disassembly of the lens structure 100.
[0050] As Figure 9 and Figure 10 shown, the present application further provides a lamp, which includes a lamp board 200, a light source, and the above lens structure 100. The lamp board 200 is annular, the light source is multiple, and the multiple light sources are arranged in an array on the annular lamp board 200. At least part of the light sources are covered with the above lens structure 100. The lamp board 200, the light source, and the above lens structure 100 form a lamp sticker, and the lamp sticker is detachably arranged in the lamp. In this way, during subsequent use, when the lamp is damaged or the brightness is insufficient, only the lamp sticker can be replaced, which can reduce the replacement cost.
[0051] Specifically, the multiple light sources include one or more of lamp beads, LED lamp beads, and laser light sources. In a specific embodiment of the present application, the multiple light sources are all lamp beads, specifically lamp beads of model 2835.
[0052] In addition, as Figure 10 shown, the lamp further includes a base and a lamp cover 300. During assembly, after assembling the lamp board 200, multiple light sources, and multiple lens structures 100, they are assembled on the base, and then the lamp cover 300 is irradiated on the base, so that a receiving space for the lamp board 200, multiple light sources, and multiple lens structures 100 is formed between the base and the lamp cover 300. When using a single lens with a traditional circular light distribution and placing it inside the corresponding lamp, the central illuminance of the lamp cover 300 will be insufficient, and a central dark spot will be generated, as Figure 11 shown. By adopting the lens structure 100 with an elliptical light distribution in this application, the short axis direction of the light incident surface 11 of the lens structure 100 is parallel to the radial direction of the lamp, so that the long axis direction of the elliptical light spot output by the lens structure 100 points to the center of the lamp cover 300. The lens structure 100 that outputs an elliptical light spot will concentrate more light energy in the center of the lamp cover 300, thereby improving the central illuminance of the lamp, making the outgoing light of the entire lamp more uniform and the illuminance more uniform, Figure 12 The illuminance diagram of the lamp of this application is shown. It can be seen from the figure that the central illuminance is relatively uniform.
[0053] In an alternative embodiment of this application, the above-mentioned lens structures 100 are covered on multiple light sources on the lamp board 200, and the multiple light sources and the multiple lens structures 100 are arranged in one-to-one correspondence. In another alternative embodiment of this application, only a part of the light sources on the lamp board 200 are covered with the above-mentioned lens structures 100, and the other part of the light sources are not provided with lens structures 100. In another alternative embodiment of this application, a form of mixing a lens with a circular light distribution and the lens structure 100 with an elliptical light distribution of this application can also be adopted. Specifically, the above-mentioned lens structures 100 are covered on a part of the light sources on the lamp board 200, and existing lenses with a circular light distribution are covered on the other part of the light sources.
[0054] Optionally, the above-mentioned lamp can be a ceiling lamp, but it is not limited thereto.
[0055] Obviously, the above-described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0056] It should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to this application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0057] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here.
[0058] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A lens structure for a lamp, characterized in that, It includes a body, the body having a first accommodation cavity (10), a light incident surface (11) and a light exit surface (20). The first accommodation cavity (10) is located on the light incident side of the body and bulges towards the direction close to the light exit surface (20). The cavity wall surface of the first accommodation cavity (10) is the light incident surface (11). The projection of the light incident surface (11) on the light incident side is elliptical, and the ratio between the length of the major axis and the length of the minor axis of the ellipse is greater than or equal to 1.5 and less than or equal to 2.
2. The lens structure for a lighting fixture according to claim 1, wherein, The light incident surface (11) is a part of the surface of an ellipsoid.
3. The lens structure for a lighting fixture according to claim 1, characterized in that, The light incident surface (11) is a curved surface, and the radius of curvature of the curved surface is greater than or equal to 0.2 mm and less than or equal to 20 mm.
4. The lens structure for a lamp according to claim 1, wherein the ratio between the height of the first accommodation cavity (10) on the central axis (50) of the body and the length of the major axis of the ellipse is greater than or equal to 0.4 and less than or equal to 0.6; and / or the ratio between the height of the first accommodation cavity (10) on the central axis (50) of the body and the length of the minor axis of the ellipse is greater than or equal to 0.7 and less than or equal to 0.
9.
5. The lens structure for a lighting fixture according to claim 1, wherein, The light exit surface (20) includes a first arc surface (21) and a second arc surface (22) arranged concentrically. The second arc surface (22) is located on the outer peripheral side of the first arc surface (21). The first arc surface (21) is conical. The apex of the conical first arc surface (21) is closer to the light incident side than the bottom of the cone. The second arc surface (22) bulges towards the direction away from the light incident surface (11).
6. The lens structure for a lamp according to claim 5, wherein, The apex of the first arc surface (21) is located on the central axis (50) of the body, and the distance between the apex of the first arc surface (21) and the bottom of the first arc surface (21) on the central axis (50) of the body is less than the distance between the apex of the first arc surface (21) and the light incident surface (11) on the central axis (50) of the body.
7. The lens structure for a lamp according to claim 5, wherein the distance between the apex of the first arc surface (21) and the light incident surface (11) on the central axis (50) of the body is greater than or equal to 2 mm and less than or equal to 2.5 mm; and / or the radius of curvature of the first arc surface (21) is greater than or equal to 0.3 mm and less than or equal to 1 mm, and the radius of curvature of the second arc surface (22) is greater than or equal to 1 mm and less than or equal to 30 mm.
8. The lens structure for a lighting fixture according to claim 5, characterized in that, The ratio between the projected area of the first arc surface (21) on the light incident side and the projected area of the second arc surface (22) on the light incident side is greater than or equal to 8% and less than or equal to 12%.
9. The lens structure for a lighting fixture according to any one of claims 1 to 8, characterized in that, The exit beam angle of the lens structure in the first direction is different from the exit beam angle of the lens structure in the second direction, and the first direction is perpendicular to the second direction. The exit beam angle of the lens structure in the first direction is greater than or equal to 170° and less than or equal to 180°; and / or The exit beam angle of the lens structure in the second direction is greater than or equal to 120° and less than or equal to 150°.
10. The lens structure for a lighting fixture according to any one of claims 1 to 8, characterized in that, The main body further comprises a second accommodating cavity (30) and a circumferential flange structure (40); the first accommodating cavity (10) is connected to the external space of the main body via the second accommodating cavity (30); and the surface of the circumferential flange structure (40) facing away from the light emitting surface (20) is flush with the end face of the light incident side of the main body.
11. A lighting fixture, characterized in that, include: Light board (200); A light source, wherein there are a plurality of light sources, the plurality of light sources are arranged in an array on the light board (200), and at least some of the light sources are covered with a lens structure (100) as claimed in any one of claims 1 to 10.