Light control structure and lamp

Abstract

The utility model belongs to the technical field of illumination, and relates to a light control structure and a lamp. The light control structure comprises a lens, and the lens comprises a reflection part and an inner core part; the reflection part surrounds the periphery of the inner core part, and a light inlet cavity is formed between the reflection part and the inner core part; the inner core part and the light inlet cavity are oppositely arranged, the inner core part has a light gathering effect on light rays in the light inlet cavity, the maximum radial width of the inner core part is R, the maximum radial width of the lens is D, and the ratio of R to D is larger than or equal to 0.4 and smaller than or equal to 1. The maximum radial width R of the inner core part is increased, so that the ratio of R to the maximum radial width D of the lens is larger than or equal to 0.4 and smaller than or equal to 1, the inner core part can cover a larger angle range, more large-angle light rays in the light inlet cavity can directly irradiate the inner core part, and the light emitting efficiency is improved. The inner core part can enable large-angle light to be emitted in the direction close to the central axis of the lens, and therefore the light spot angle is reduced under the condition that the diameter of the lens is not increased and the diameter of the light source piece is not reduced.

Description

Technical Field

[0001] The present application relates to the technical field of lighting, and more particularly, to a light control structure and a lamp. Background Art

[0002] The light spot angle of a small-angle lens is relatively small, which can improve the central light intensity and lighting effect of the lamp, and has a wide range of applications in the fields of stage lights, wall washing lights, spotlights, landscape decoration lights, small flashlights, desk lamps, etc. The diameter ratio of the light source to the lens of a conventional TIR lens lighting module is about 1:10, and its light spot angle is generally above 15°. At present, in order to further reduce the light spot angle and achieve small-angle light distribution, the main methods are to increase the lens diameter or decrease the light source diameter. However, increasing the lens diameter will lead to an increase in the volume of the entire module, and decreasing the light source diameter will lead to a decrease in the power of the light source and the overall brightness of the lamp.

[0003] Based on the above situation, how to achieve small-angle light distribution under the caliber and height of a conventional lens has become an urgent problem to be solved. Summary of the Utility Model

[0004] The technical problem to be solved by the embodiments of the present application is that in the prior art, in order to further reduce the light spot angle and achieve small-angle light distribution, the main methods are to increase the lens diameter or decrease the light source diameter. However, increasing the lens diameter will lead to an increase in the volume of the entire module, and decreasing the light source diameter will lead to a decrease in the power of the light source and the overall brightness of the lamp.

[0005] To solve the above technical problem, the embodiments of the present application provide a light control structure, and adopt the following technical solutions:

[0006] A light control structure includes a lens, and the lens includes a reflection part and a core part;

[0007] The reflection part surrounds the outer periphery of the core part, and a light inlet cavity is formed between the reflection part and the core part;

[0008] The core part is disposed opposite to the light inlet cavity, the core part has a light condensing effect on the light in the light inlet cavity, the maximum radial width of the core part is R, the maximum radial width of the lens is D, and the ratio of R to D is greater than or equal to 0.4 and less than or equal to 1.

[0009] Further, the core part includes a first light inlet surface and a first light outlet surface that are oppositely disposed;

[0010] The first light inlet surface is located on the side of the core part close to the light inlet cavity, and the first light inlet surface is an arc surface protruding towards the light inlet cavity;

[0011] The first light-emitting surface is located on the side of the inner core part away from the light-incident cavity, and the first light-emitting surface is an arc surface protruding in the direction away from the light-incident cavity.

[0012] Further, the reflection part includes a second light-incident surface and a second light-emitting surface;

[0013] The second light-incident surface surrounds the outer periphery of the first light-incident surface, and the first light-incident surface and the second light-incident surface jointly enclose the light-incident cavity;

[0014] The second light-emitting surface surrounds the outer periphery of the first light-emitting surface.

[0015] Further, the reflection part further includes a total reflection surface, and the total reflection surface is arranged on the outer wall surface of the lens.

[0016] Further, microstructures are provided on the first light-emitting surface and / or the second light-emitting surface.

[0017] Further, the light control structure further includes a light source bracket, the light source bracket is arranged at an interval from the lens along the central axis direction of the light control structure, the light source bracket has a first end face facing the lens, the reflection part has a second end face facing the light source bracket, and a light-shielding gap is provided between the first end face and the second end face.

[0018] Further, the height of the light-shielding gap is H1, the height of the lens is H2, and the ratio of H1 to H2 is greater than zero and less than 1.

[0019] Further, a groove is provided on the first end face, and the groove is used for placing a light source component;

[0020] The light control structure further includes a lens bracket, the lens bracket is fixed on the light source bracket, and heat dissipation holes communicating with the external atmosphere are provided on the lens bracket;

[0021] The lens is fixed in the lens bracket, a first ventilation gap is provided between the lens and the lens bracket, the light-shielding gap, the groove and the light-incident cavity jointly form a second ventilation gap, and the first ventilation gap, the second ventilation gap and the heat dissipation holes communicate with each other.

[0022] Further, an installation step is provided on the side of the lens bracket away from the light source bracket, a buckle is provided on the installation step, a convex block is provided on the buckle, and a limiting groove is formed between the convex block and the installation step;

[0023] The lens is provided with an insertion block adapted to the buckle, and the insertion block is placed on the installation step and inserted into the limiting groove.

[0024] To solve the above technical problems, the embodiments of the present application further provide a lighting fixture, which adopts the following technical solutions:

[0025] A lighting fixture includes a light source member and the light control structure as described above. The light source member is used to provide light for the light control structure.

[0026] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:

[0027] In the technical solution provided by the present application, by increasing the maximum radial width R of the inner core part, the ratio between R and the maximum radial width D of the lens is greater than or equal to 0.4 and less than or equal to 1. The inner core part can cover a larger angular range, so that more large-angle light rays in the light inlet cavity can directly irradiate on the inner core part. And the inner core part has a light-gathering effect, which can make the large-angle light rays irradiating on the inner core part exit in the direction close to the central axis of the lens. Thus, without increasing the lens diameter and reducing the diameter of the light source member, the spot angle can be reduced to achieve small-angle light distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the solutions in the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 is a schematic cross-sectional view of the light control structure provided by the embodiment of the present utility model;

[0030] Figure 2 is an exploded view of the light control structure provided by the embodiment of the present utility model;

[0031] Figure 3 is a schematic cross-sectional view of the light control structure from another angle provided by the embodiment of the present utility model;

[0032] Figure 4 is the embodiment of the present utility model Figure 3 a partial enlarged view of part A therein;

[0033] Figure 5 is a schematic cross-sectional view of the light control structure provided by the embodiment of the present utility model;

[0034] Figure 6 is a schematic optical path diagram of the light control structure provided by the embodiment of the present utility model.

[0035] Reference Signs:

[0036] 100, light control structure; 1, lens; 11, reflection part; 111, second light incident surface; 112, second light exit surface; 113, total reflection surface; 114, second end face; 12, inner core part; 121, first light incident surface; 122, first light exit surface; 13, light incident cavity; 131, light incident port; 14, micro-structure; 15, insert block; 2, light source bracket; 21, first end face; 22, light shielding gap; 23, groove; 3, lens bracket; 31, heat dissipation hole; 32, first ventilation gap; 33, installation step; 34, buckle; 35, convex block; 4, light source component. Detailed implementation manners

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order.

[0038] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0039] In order to enable those skilled in the technical field to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the drawings.

[0040] The following will be combined with Figures 1 to 6 to describe the embodiments of the present invention.

[0041] Please refer to Figure 1 and Figure 5, an embodiment of the present application provides a light control structure 100, including a lens 1. The lens 1 includes a reflection part 11 and a core part 12; the reflection part 11 surrounds the outer periphery of the core part 12, and a light inlet cavity 13 is formed between the reflection part 11 and the core part 12; the core part 12 is disposed opposite to the light inlet cavity 13, and the core part 12 has a light condensing effect on the light in the light inlet cavity 13. The maximum radial width of the core part 12 is R, and the maximum radial width of the lens 1 is D. The ratio of R to D is greater than or equal to 0.4 and less than or equal to 1. Specifically, the light inlet cavity 13 has a light inlet 131. The light of the light source part 4 can enter the light inlet cavity 13 through the light inlet 131 and irradiate on the reflection part 11 and the core part 12. The core part 12 can refract or reflect the light in the light inlet cavity 13, so that the light in the light cavity exits in the direction close to the central axis of the lens 1.

[0042] Further, the ratio of R to D is any one or the range between any two of 0.4, 0.6, 0.7, 0.8, 0.9, 1, etc.

[0043] In this embodiment, by increasing the maximum radial width R of the core part 12, the ratio between R and D is greater than or equal to 0.4 and less than or equal to 1. The core part 12 can cover a larger angular range, so that more large-angle light rays and small-angle light rays in the light inlet cavity 13 can directly irradiate on the core part 12. And the core part 12 has a light condensing effect, which can make the light irradiating on the core part 12 exit in the direction close to the central axis of the lens 1. Furthermore, without increasing the diameter of the lens 1 and reducing the diameter of the light source part 4, the spot angle can be reduced to less than 15°, realizing small-angle light distribution. At the same time, the brightness of the central spot can be increased, improving the lighting effect.

[0044] In one embodiment, please refer to Figure 1 , the core part 12 includes a first light inlet surface 121 and a first light outlet surface 122 which are oppositely arranged; the first light inlet surface 121 is located on the side of the core part 12 close to the light inlet cavity 13, and the first light inlet surface 121 is an arc surface protruding towards the light inlet cavity 13; the first light outlet surface 122 is located on the side of the core part 12 away from the light inlet cavity 13, and the first light outlet surface 122 is an arc surface protruding away from the light inlet cavity 13. In this embodiment, the first light inlet surface 121 is an arc surface protruding towards the light inlet cavity 13, and the first light outlet surface 122 is an arc surface protruding away from the light inlet cavity 13, so that the core part 12 has a light condensing effect, which is convenient for the core part 12 to make the light exit in the direction close to the central axis of the lens 1.

[0045] In one embodiment, please refer to Figure 1, the reflecting portion 11 includes a second light-incoming surface 111 and a second light-emitting surface 112; the second light-incoming surface 111 surrounds the outer periphery of the first light-incoming surface 121, and the first light-incoming surface 121 and the second light-incoming surface 111 jointly enclose the light-incoming cavity 13; the second light-emitting surface 112 surrounds the outer periphery of the first light-emitting surface 122, and the first light-emitting surface 122 and the second light-emitting surface 112 are connected to each other and jointly constitute the total light-emitting surface of the lens 1. In this embodiment, after the light enters the light-incoming cavity 13, a part of the light is irradiated onto the first light-incoming surface 121, and after being refracted and reflected by the inner core portion 12, it is emitted from the first light-emitting surface 122; another part of the light is irradiated onto the second light-incoming surface 111, and after being refracted and reflected by the reflecting portion 11, it is emitted from the second light-emitting surface 112.

[0046] In one embodiment, please refer to Figure 1 The reflecting portion 11 further includes a total reflection surface 113, which is disposed on the outer wall of the lens 1. In this embodiment, the total reflection surface 113 can reflect the light that may have been scattered or escaped back to the first light emitting surface 122 and the second light emitting surface 112, thereby reducing light loss and improving light utilization.

[0047] In one embodiment, please refer to Figure 2 , a microstructure 14 is provided on the first light exiting surface 122 and / or the second light exiting surface 112. In this embodiment, the shape, quantity and arrangement of the microstructure 14 are not limited. The shape of the microstructure 14 can be spherical, conical, polygonal, concave, convex or other shapes. The arrangement of the microstructure 14 is not limited, and can be a Thiessen polygon arrangement, a golden spiral arrangement, a ring array, an irregular arrangement or other arrangements. The microstructure 14 can scatter the light, so that the light is more evenly distributed on the first light exiting surface 122 and the second light exiting surface 112, thereby reducing glare.

[0048] In one embodiment, please refer to Figure 1 , Figure 5 and Figure 6 The light control structure 100 also includes a light source bracket 2, which is used to fix the light source component 4. The light source bracket 2 and the lens 1 are spaced apart along the central axis direction of the light control structure 100. The light source bracket 2 has a first end face 21 facing the lens 1, and the reflecting portion 11 has a second end face 114 facing the light source bracket 2. A light-shielding gap 22 is provided between the first end face 21 and the second end face 114.

[0049] In this embodiment, a light-shielding gap 22 is provided between the light source bracket 2 and the lens 1, so that the outermost large-angle light of the light source 4 will not be irradiated onto the lens 1, but will be irradiated to the area outside the lens 1 through the light-shielding gap 22. The large-angle light passing through the lens 1 will become less, so that the angle of the light spot emitted from the total light-emitting surface will become smaller.

[0050] In one embodiment, please refer to Figure 5 , the height of the light-shielding gap 22 is H1, the height of the lens 1 is H2, and the ratio of H1 to H2 is greater than zero and less than 1. In this embodiment, by setting the ratio between H1 and H2 to be greater than zero and less than 1, on the one hand, it can ensure that too much large-angle light does not irradiate into the lens 1, making the spot angle of the lens 1 too large; on the other hand, it can ensure that the light passing through the lens 1 is not too little, so as to ensure the brightness and illumination effect of the spot.

[0051] Furthermore, the ratio between H1 and H2 is any one or the range between any two of 1:19, 1:15, 1:10, 1:8, 1:6, 1:4, 1:3, 1:1, etc.

[0052] In one embodiment, please refer to Figure 1 and Figure 2 , a groove 23 is provided on the first end face 21, and the groove 23 is used to place the light source part 4; the light control structure 100 further includes a lens bracket 3, the lens bracket 3 is fixed on the light source bracket 2, and the lens bracket 3 is provided with heat dissipation holes 31 communicating with the external atmosphere; the lens 1 is fixed in the lens bracket 3, and a first ventilation gap 32 is provided between the lens 1 and the lens bracket 3, and the light-shielding gap 22, the groove 23 and the light inlet cavity 13 together form a second ventilation gap (not shown in the figure), and the first ventilation gap 32, the second ventilation gap and the heat dissipation holes 31 communicate with each other.

[0053] In this embodiment, by providing the first ventilation gap 32, the second ventilation gap and the heat dissipation holes 31 in the light control structure 100, ventilation and heat dissipation can be carried out on the lens 1 and the light source part 4 in the groove 23, and the service life of the light control structure 100 can be improved.

[0054] In one embodiment, please refer to Figure 3 and Figure 4 , on one side of the lens bracket 3 away from the light source bracket 2, there is an installation step 33, a buckle 34 is provided on the installation step 33, a convex block 35 is provided on the buckle 34, and a limiting groove (not shown in the figure) is formed between the convex block 35 and the installation step 33; the lens 1 is provided with an insertion block 15 adapted to the buckle 34, and the insertion block 15 is placed on the installation step 33 and inserted into the limiting groove.

[0055] In this embodiment, the installation step 33 can provide a supporting effect for the lens 1, and the limiting groove can provide a limiting and fixing effect for the lens 1 to prevent the lens 1 from detaching from the lens bracket 3.

[0056] According to an embodiment of the present invention, a lamp is further provided, which includes a light source part 4 and the light control structure 100 as described above, and the light source part 4 is used to provide light for the light control structure 100.

[0057] In this embodiment, the lamp increases the maximum radial width R of the inner core 12 of the lens 1 such that the ratio between R and the maximum radial width D of the lens 1 is greater than or equal to 0.4 and less than or equal to 1. The inner core 12 can cover a larger angular range, enabling more large-angle light rays in the light inlet cavity 13 to directly irradiate on the inner core 12. The inner core 12 has a light-concentrating effect, enabling the large-angle light rays irradiating on the inner core 12 to exit in the direction towards the central axis of the lens 1. Thus, without increasing the diameter of the lens 1 and reducing the diameter of the light source component 4, the spot angle can be reduced to achieve small-angle light distribution. At the same time, the brightness of the central spot can be increased to improve the lighting effect.

[0058] Obviously, the embodiments described above are only a part of the embodiments of the present application, rather than all the embodiments. The drawings show the preferred embodiments of the present application, but do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements for some of the technical features. Any equivalent structures directly or indirectly using the content of the specification and drawings of the present application in other related technical fields are equally within the scope of the patent protection of the present application.

Claims

1. A light control structure, characterized in that, Comprising a lens, the lens including a reflection portion and a core portion; The reflection portion surrounds the outer periphery of the core portion, and a light incident cavity is formed between the reflection portion and the core portion; The core portion is disposed opposite to the light incident cavity, the core portion has a light condensing effect on the light in the light incident cavity, the maximum radial width of the core portion is R, the maximum radial width of the lens is D, and the ratio of R to D is greater than or equal to 0.4 and less than or equal to 1.

2. The light control structure according to claim 1, wherein The core portion includes a first light incident surface and a first light exiting surface which are oppositely disposed; The first light incident surface is located on the side of the core portion close to the light incident cavity, and the first light incident surface is an arc surface protruding towards the light incident cavity; The first light exiting surface is located on the side of the core portion far from the light incident cavity, and the first light exiting surface is an arc surface protruding away from the light incident cavity.

3. The light control structure according to claim 2, wherein The reflection portion includes a second light incident surface and a second light exiting surface; The second light incident surface surrounds the outer periphery of the first light incident surface, and the first light incident surface and the second light incident surface jointly enclose the light incident cavity; The second light exiting surface surrounds the outer periphery of the first light exiting surface.

4. The light control structure according to claim 3, wherein Microstructures are provided on the first light exiting surface and / or the second light exiting surface.

5. The light control structure according to claim 1, wherein The reflection portion further includes a total reflection surface, and the total reflection surface is disposed on the outer wall surface of the lens.

6. The light control structure according to any one of claims 1 to 5, characterized in that, The light control structure further includes a light source bracket, the light source bracket is spaced from the lens along the central axis direction of the light control structure, the light source bracket has a first end face facing the lens, the reflection portion has a second end face facing the light source bracket, and a light shielding gap is provided between the first end face and the second end face.

7. The light control structure according to claim 6, wherein The height of the light shielding gap is H1, the height of the lens is H2, and the ratio of H1 to H2 is greater than zero and less than 1.

8. The light control structure according to claim 6, wherein A groove is provided on the first end face, and the groove is used for placing a light source component; The light control structure further includes a lens bracket, the lens bracket is fixed on the light source bracket, and heat dissipation holes communicating with the external atmosphere are provided on the lens bracket; The lens is fixed in the lens bracket, a first ventilation gap is provided between the lens and the lens bracket, the light shielding gap, the groove and the light incident cavity jointly form a second ventilation gap, and the first ventilation gap, the second ventilation gap and the heat dissipation holes communicate with each other.

9. The light control structure according to claim 8, wherein, An installation step is provided on the side of the lens bracket away from the light source bracket, a buckle is provided on the installation step, a convex block is provided on the buckle, and a limiting groove is formed between the convex block and the installation step; The lens is provided with an insertion block adapted to the buckle, and the insertion block is placed on the installation step and inserted into the limiting groove.

10. A lighting fixture, characterized in that, Comprising a light source component and the light control structure according to any one of claims 1 to 9, the light source component being used to provide light for the light control structure.

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