A variable-angle lens and a lamp

Abstract

The present invention discloses a variable-angle lens and a lamp. The variable-angle lens includes a lens body, the lens body having opposite first and second ends, the end face size of the first end being larger than that of the second end. The first end has a concave first optical surface, and the second end has a concave second optical surface. The wall surface of the lens body between the first end and the second end is a third optical surface, and the third optical surface is a convex arc surface. When the first optical surface is used as the light incident surface, the third optical surface is the light exit surface, and at least part of the light incident on the lens body through the first optical surface diffuses and exits at the third optical surface. When the second optical surface is used as the light incident surface, the third optical surface is the reflecting surface, and the end face of the first end is the light exit surface. At least part of the light incident on the lens body through the second optical surface is reflected at the third optical surface and converges and exits at the end face of the first end, thereby achieving large-angle diffusion light distribution and small-angle converging light distribution of the lamp.

Description

Technical Field

[0001] The present invention relates to the field of lighting technology, and particularly to a variable-angle lens and a lamp. Background Art

[0002] In existing lamps, a lens is generally used for light distribution of a light source to change the illumination range of the light source. However, the light distribution mode of the existing lens is relatively single. A lens usually only has a diffusing light distribution function or a converging light distribution function. Generally, a hyperbolic lens is used for large-angle diffusing light distribution, while a TIR lens is mostly used for small-angle converging light distribution. The prior art lacks a lens that can switch between a diffusing light distribution mode and a converging light distribution mode, so as to be applicable to scenarios of large-angle floodlighting and small-angle spotlighting. Summary of the Invention

[0003] The present invention discloses a variable-angle lens to solve the technical problems of the existing light distribution lens having a single light distribution mode and poor practicability.

[0004] To solve the above problems, the present invention adopts the following technical solutions:

[0005] The variable-angle lens of the present invention includes a lens body. The lens body has opposite first and second ends. The end face size of the first end is larger than that of the second end. The first end has an inwardly concave first optical surface, and the second end has an inwardly concave second optical surface. The wall surface of the lens body between the first end and the second end is a third optical surface, and the third optical surface is an outwardly convex arc surface.

[0006] When the first optical surface is used as the incident light surface, the third optical surface is the outgoing light surface, and at least part of the light incident on the lens body through the first optical surface is diffusely emitted from the third optical surface.

[0007] When the second optical surface is used as the incident light surface, the third optical surface is a reflecting surface, and the end face of the first end is the outgoing light surface. At least part of the light incident on the lens body through the second optical surface is reflected on the third optical surface and convergently emitted from the end face of the first end.

[0008] Further, the first optical surface is an arc surface that is concave towards the third optical surface.

[0009] Further, the second optical surface is an arc surface that is concave towards the third optical surface.

[0010] Further, the first optical surface forms a first cavity by inwardly recessing at the first end, and the second optical surface forms a second cavity by inwardly recessing at the second end. The second cavity is formed by enclosing the second optical surface and a light splitting bottom surface, and the second optical surface surrounds the light splitting bottom surface.

[0011] When the first optical surface is used as the light incident surface, both the beam splitting bottom surface and the third optical surface are light exiting surfaces. The light rays incident through the middle part of the first cavity exit at the beam splitting bottom surface, and the light rays incident through the peripheral part of the first cavity exit at the third optical surface.

[0012] When the second optical surface is used as the light incident surface, both the end face of the first end and the third optical surface are light exiting surfaces. The light rays incident through the middle part of the second cavity are reflected at the first optical surface and exit at the third optical surface, and the light rays incident through the peripheral part of the second cavity are reflected at the third optical surface and exit at the end face of the first end.

[0013] Furthermore, the beam splitting bottom surface is a plane perpendicular to the central axis of the lens body or a curved surface recessed towards the first cavity.

[0014] Furthermore, the lens body is of a rotary configuration.

[0015] Furthermore, the opening size of the first cavity at the first end is smaller than the end face size of the first end.

[0016] Furthermore, the opening size of the second cavity is equal to the end face size of the second end.

[0017] Furthermore, the opening size of the first cavity is smaller than or equal to the opening size of the second cavity.

[0018] Furthermore, the lens body is of a bowl-shaped configuration.

[0019] The present invention also provides a lamp, which includes a light source and the above-mentioned variable-angle lens, and the light source is located in the first cavity or the converging cavity.

[0020] Furthermore, the light source is an LED light source.

[0021] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0022] The variable-angle lens disclosed in the embodiments of the present invention can switch the light distribution mode of the lens body by flipping the lens body: when the first optical surface is used as the light incident surface, the third optical surface is used as the light exit surface, and at least part of the light incident on the lens body through the first optical surface is refracted at the third optical surface and diffusely exits, thereby increasing the light distribution angle of the light source; when the second optical surface is used as the light incident surface, the third optical surface is used as the reflecting surface, and the end surface of the first end is used as the light exit surface, and at least part of the light incident on the lens body through the second optical surface is reflected at the third optical surface and converges and exits at the end surface of the first end, thereby reducing the light distribution angle of the light source; therefore, the variable-angle lens disclosed in the embodiments of the present invention is applicable to some scenarios where the light distribution angle of the lamp needs to change, and has strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention 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 only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a schematic structural diagram of the variable-angle lens of the embodiment;

[0025] Figure 2 is a cross-sectional view of the variable-angle lens of the embodiment;

[0026] Figure 3 is a schematic diagram of the diffused light distribution of the variable-angle lens of the embodiment;

[0027] Figure 4 is a schematic diagram of the converged light distribution of the variable-angle lens of the embodiment.

[0028] In the figure:

[0029] 100 - lens body, 110 - first optical surface, 120 - second optical surface, 130 - third optical surface, 140 - first cavity, 150 - second cavity, 160 - light splitting bottom surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope protected by the present invention.

[0031] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than 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 can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0032] The following will Figures 1 to 4 be described in detail with reference to the accompanying drawings, through specific embodiments and their application scenarios, the variable-angle lens provided by the embodiments of this application.

[0033] An embodiment of the present invention provides a variable-angle lens. The variable-angle lens includes a lens body 100. The lens body 100 has opposite first and second ends, and the end face size of the first end is larger than that of the second end.

[0034] The first end of the lens body 100 has a concave first optical surface 110, the second end has a concave second optical surface 120, and the wall surface of the lens body 100 between the first end and the second end is a third optical surface 130. The third optical surface 130 is a convex arc surface.

[0035] When the light source is located at the first end, with the first optical surface 110 as the incident surface, the third optical surface 130 is the exit surface, and at least part of the light rays incident on the lens body 100 through the first optical surface 110 are diffusely emitted from the third optical surface 130.

[0036] Specifically, as shown in Figure 3 , the first optical surface 110 is an arc surface concave toward the third optical surface 130. When the light rays are incident through the first optical surface 110, both the first optical surface 110 and the third optical surface are concave surfaces relative to the light source. The light rays are refracted for the first time on the first optical surface 110 and enter the lens body 100, and the light rays entering the lens body 100 are refracted for the second time on the third optical surface 130 and then emitted.

[0037] Taking the incident light ray that is incident on the first optical surface 110 and whose refracted light ray is perpendicular to the third optical surface 130 as the first reference light ray, according to the principle of light refraction, the exit light rays of the incident light rays between the first reference light ray and the first end are deflected toward the first end, and the exit light rays of the incident light rays between the first reference light ray and the second end are deflected toward the second end.

[0038] Taking the incident light ray perpendicular to the first optical surface 110 as the second reference light ray, with the second reference light ray located between the first reference light ray and the first end face, the optical path of the second reference light ray is described as follows:

[0039] The second reference light ray perpendicularly enters at the first optical surface 110. When the second reference light ray exits at the third optical surface 130, the normal line at the exit point is located below the second reference light ray. According to the principle of refraction of light, the exit light ray of the second reference light ray deflects towards the first end of the lens body 100. Therefore, the angle formed between the exit light ray and the lens body axis is greater than the angle formed between the second reference light ray and the lens body axis, increasing the angle of the second reference light ray relative to the lens body 100.

[0040] Similarly, for the incident light rays within the interval between the first reference light ray and the first end, the angle formed between their exit light rays and the lens body 100 axis is greater than the angle formed between the incident light rays and the lens body 100 axis. Thus, the light distribution angle of the light source is increased, that is, the light rays are diffusely emitted.

[0041] Refer to Figure 4 As shown, the second optical surface 120 is a concave surface relative to the light source. When the light source is located at the second end, taking the second optical surface 120 as the incident light surface, then the third optical surface 130 is the reflecting surface, and the end face at the first end is the exit light surface. At least part of the light rays incident into the lens body 100 through the second optical surface 120 are reflected at the third optical surface 130 and converge and exit at the end face of the first end.

[0042] The first optical surface 110 is recessed inward at the first end to form a first cavity 140, and the first optical surface 110 constitutes the cavity wall of the first cavity 140. The second optical surface 120 is recessed inward at the second end to form a second cavity 150, and the second optical surface 120 constitutes the annular wall of the second cavity 150. The second cavity 150 is formed by enclosing the second optical surface 120 and the light splitting bottom surface 160. The light splitting bottom surface 160 is a plane perpendicular to the central axis of the lens body 100 or an arc surface recessed towards the first cavity 140, and the second optical surface 120 surrounds the light splitting bottom surface 160.

[0043] When taking the first optical surface 110 as the incident light surface, both the light splitting bottom surface 160 and the third optical surface 130 are exit light surfaces: Specifically, refer to Figure 3 As shown, the light rays incident through the middle part of the first cavity 140 exit at the light splitting bottom surface 160, and part of the light rays exiting at the light splitting bottom surface 160 are refracted at the second optical surface 120 and then enter the lens body 100 again and exit at the third optical surface 130; the light rays incident through the peripheral part of the first cavity 140 directly exit at the third optical surface 130.

[0044] When the second optical surface 120 is used as the light incident surface, the end surface of the first end and the third optical surface 130 are both light exit surfaces: Specifically, referring to Figure 4 As shown, the light rays incident on the middle part of the second cavity 150 are refracted by the beam splitting bottom surface 160 and enter the lens body 100, and then are reflected on the first optical surface 110 and exit from the third optical surface 130. Some of the light rays reflected by the first optical surface 110 directly exit from the third optical surface 130, while the other part of the light rays reflected by the first optical surface 110 are totally reflected by the end surface of the first end and then exit from the third optical surface 130. The light rays exiting from the third optical surface 130 form a secondary light spot on the periphery of the lens body 100, which can be absorbed by the mounting component for mounting the lens body 100; the light rays incident on the peripheral part of the second cavity 150 are reflected on the third optical surface 130 and directly exit from the end surface of the first end.

[0045] In an alternative embodiment, the lens body 100 has a rotary configuration, and the central axes of the first cavity 140, the second cavity 150, and the lens body 100 coincide.

[0046] In a preferred embodiment, the lens body 100 has a bowl-shaped configuration, and the end surfaces of both the first end and the second end are circular surfaces, which have the advantages of good light emission uniformity, high light emission efficiency, and simple and beautiful appearance.

[0047] The opening size of the first cavity 140 at the first end is smaller than the end surface size of the first end, so that the end surface of the first end is annular, and when performing small-angle light distribution, the converging light rays exit from this annular end surface.

[0048] The opening size of the second cavity 150 at the second end is equal to the end surface size of the second end. When the light source is at the second end of the lens body 100, the light rays incident on the peripheral part of the second cavity 150 can undergo total internal reflection on the third optical surface 130 as much as possible, thereby improving the brightness of the lens body during small-angle light distribution.

[0049] In a preferred embodiment, the opening size of the first cavity 140 is less than or equal to the opening size of the second cavity 150. When performing small-angle light distribution, the light rays that undergo total internal reflection on the third optical surface 130 can all exit from the end surface of the first end, avoiding interference from the first optical surface 110.

[0050] The embodiment of the present invention further provides a lighting fixture, including a light source and the above variable-angle lens, and the light source is located at the first end or the second end of the lens body 100.

[0051] As a further improvement of this embodiment, the light source is an LED light source, and the LED light source has the advantages of environmental protection, energy saving, and long service life.

[0052] In summary, the variable-angle lens and the lamp provided by the embodiments of the present invention have the following technical effects:

[0053] By flipping the lens body 100, the light distribution mode of the lens body can be switched: when the first optical surface 110 is the incident surface, the third optical surface 130 is the exit surface, and at least part of the light incident on the lens body 100 through the first optical surface 110 is refracted at the third optical surface 130 and diffusely exits, thereby increasing the light distribution angle of the light source; when the second optical surface 120 is the incident surface, the third optical surface 130 is the reflecting surface, and the end surface of the first end is the exit surface, and at least part of the light incident on the lens body through the second optical surface 120 is reflected at the third optical surface 130 and converges and exits at the end surface of the first end, thereby reducing the light distribution angle of the light source; therefore, the variable-angle lens disclosed in the embodiments of the present invention is applicable to some scenarios where the light distribution angle of the lamp needs to change, and has strong practicability.

[0054] It should be noted that in this article, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0055] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A variable-angle lens, characterized in that, it includes a lens body (100), the lens body (100) has opposite first and second ends, the end face size of the first end is larger than that of the second end, the first end has a concave first optical surface (110), the second end has a concave second optical surface (120), the wall surface of the lens body (100) between the first end and the second end is a third optical surface (130), the third optical surface (130) is a convex arc surface, and the light distribution mode of the lens body (100) is switched by flipping the lens body (100); When the first optical surface (110) is used as the incident light surface, the third optical surface (130) is the outgoing light surface, and at least part of the light incident into the lens body (100) through the first optical surface (110) diffuses and exits at the third optical surface (130); When the second optical surface (120) is used as the incident light surface, the third optical surface (130) is the reflecting surface, and the end face of the first end is the outgoing light surface. At least part of the light incident into the lens body (100) through the second optical surface (120) is reflected at the third optical surface (130) and converges and exits at the end face of the first end.

2. The variable-angle lens according to claim 1, characterized in that, the first optical surface (110) is an arc surface recessed towards the third optical surface (130).

3. The variable-angle lens according to claim 2, characterized in that, the second optical surface (120) is an arc surface recessed towards the third optical surface (130).

4. The variable-angle lens according to claim 3, characterized in that, the first optical surface (110) is recessed inward at the first end to form a first cavity (140), the second optical surface (120) is recessed inward at the second end to form a second cavity (150), the second cavity (150) is formed by enclosing the second optical surface (120) and a light splitting bottom surface (160), and the second optical surface (120) surrounds the light splitting bottom surface (160); When the first optical surface (110) is used as the incident light surface, both the light splitting bottom surface (160) and the third optical surface (130) are the outgoing light surfaces. The light incident through the middle part of the first cavity (140) exits at the light splitting bottom surface (160), and the light incident through the peripheral part of the first cavity (140) exits at the third optical surface (130); When the second optical surface (120) is used as the incident light surface, both the end face of the first end and the third optical surface (130) are the outgoing light surfaces. The light incident through the middle part of the second cavity (150) is reflected at the first optical surface (110) and exits at the third optical surface (130), and the light incident through the peripheral part of the second cavity (150) is reflected at the third optical surface (130) and exits at the end face of the first end.

5. The variable-angle lens according to claim 4, characterized in that, The spectroscopic bottom surface (160) is a plane perpendicular to the central axis of the lens body (100) or a curved surface recessed toward the first cavity (140).

6. The variable-angle lens according to claim 4, wherein, the lens body (100) is of a rotary configuration.

7. The variable-angle lens according to any one of claims 4 to 6, wherein, the opening size of the first cavity (140) at the first end is smaller than the end face size of the first end.

8. The variable-angle lens according to any one of claims 4 to 6, wherein, the opening size of the second cavity (150) is equal to the end face size of the second end.

9. The variable-angle lens according to any one of claims 4 to 6, wherein, the opening size of the first cavity (140) is smaller than or equal to the opening size of the second cavity (150).

10. The variable-angle lens according to any one of claims 1 to 6, wherein, the lens body (100) is of a bowl-shaped configuration.

11. A lighting fixture, wherein, it includes a light source and the variable-angle lens according to any one of claims 1 to 10, and the light source is located at the first end or the second end of the lens body (100).

12. The lighting fixture according to claim 11, wherein, the light source is an LED light source.

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