TIR lens with annularly-cut flange edge and illuminating lamp

Abstract

The utility model provides a ring-cut flange edge TIR lens and a lighting lamp, the ring-cut flange edge TIR lens comprises a light incident part, a light transmitting part and a light emitting part which are connected in sequence, the light emitting part is provided with a light emitting groove, the light emitting groove forms a free-form surface, the free-form surface comprises a conical concave surface and a light condensation convex surface, the conical concave surface is connected to the edge of the light condensation convex surface, and the light condensation convex surface is connected to the edge of the light condensation convex surface. The light incident part is provided with an inner hole, the inner wall of the inner hole is a convex cambered surface, and the convex cambered surface is used for reflecting tangential light; the outer edge of the light emitting part is provided with a bevel ring groove in a beveled mode so that a beveled transmission face can be formed on the outer edge of the light emitting part, and the beveled transmission face is used for allowing scattered light to penetrate through. Tangent light rays with small scattering angles are reflected through the convex cambered surfaces, so that the problem of light ray layering generated by light emitting of the light emitting part is reduced; and the tapered concave surface reflects the scattered light with a smaller angle and then emits the scattered light from the beveled transmission surface, so that light layering caused by the scattered light is reduced, and the emitted light is more uniform.

Description

Technical Field

[0001] The present disclosure relates to the technical field of optical lenses, and in particular to a TIR lens with a circumferential flange edge and a lighting fixture. Background Art

[0002] With the development of the LED industry, healthy, efficient, and comfortable green lighting has gradually become the dominant direction of lamp research and development. Consumers are increasingly demanding light quality from lamps. The fading state of the light spot and the stratification of the tangential light from the lamp are undoubtedly important criteria for measuring light spot quality.

[0003] TIR lenses are widely used in LEDs. TIR lenses collimate small-angle light through the refractive surface and large-angle light through the reflective surface, thereby obtaining collimated parallel light. Figure 5 As shown in the figure, because the main spot is small and the brightness of the secondary spot is low, the TIR lens is particularly sensitive to stray light in the optical part. After the scattered light with a small angle passes through the TIR lens, it is very easy to cause tangential light stratification problems.

[0004] For example, the TIR lens disclosed in the comparative document CN201920367510.0 includes an incident surface, an exit surface, a cylindrical surface, a total reflection surface, and an annular exit surface. The exit surface is a Fresnel surface formed by the collapse of a free-form surface, and its optical path is divided into two parts. One part of the incident light is directly transmitted into the TIR lens from the incident surface and is transmitted out from the Fresnel surface of the exit surface; the other part is transmitted into the TIR lens from the cylindrical surface, reflected by the total reflection surface, and then transmitted out from the annular exit surface. Because the exit surface is a Fresnel surface formed by the collapse of a free-form surface, this solution effectively reduces the thickness and volume of the TIR lens. However, this solution fails to solve the problem of tangential light stratification caused by small-angle scattered light passing through the TIR lens. Utility Model Content

[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and to provide a TIR lens and lighting fixture with a circumferential flange that reduces light stratification and emits light more uniformly.

[0006] The purpose of this disclosure is achieved through the following technical solutions:

[0007] A TIR lens with a circumferential flange edge includes a light input portion, a light transmission portion, and a light output portion connected in sequence. The light output portion is provided with a light output groove, and the light output groove is formed with a free-form surface. The free-form surface includes a conical concave surface and a light-collecting convex surface. The conical concave surface is connected to the edge of the light-collecting convex surface. The light-collecting convex surface and the conical concave surface are both used to refract and guide light.

[0008] The light incident portion is provided with an inner hole, the inner wall of the inner hole is a convex arc surface, the convex arc surface is used to reflect tangential light to reduce the tangential light entering the light-transmitting portion, and the light-transmitting portion is used to pass light;

[0009] The outer edge of the light emitting portion is provided with an oblique annular groove, so that the outer edge of the light emitting portion forms an oblique transmission surface, and the oblique transmission surface is used to transmit scattered light.

[0010] In one embodiment, the concave tapered surface is an inwardly concave arc surface structure.

[0011] In one embodiment, the obliquely cut transmission surface is arranged parallel to the conical concave surface.

[0012] In one embodiment, a plurality of first protrusions are convexly provided on the surface of the conical concave surface.

[0013] In one embodiment, a plurality of second protrusions are provided on the surface of the light-concentrating protrusion.

[0014] In one embodiment, a circular arc protrusion is provided on a side of the light-transmitting portion facing away from the light-emitting portion, and the circular arc protrusion is located in the inner hole.

[0015] In one embodiment, the end of the inner wall of the inner hole facing away from the light-transmitting portion is connected to the outer wall of the light-incident portion.

[0016] In one embodiment, the TIR lens with an annular flange further includes an assembly protrusion, and the assembly protrusion is connected to the outer peripheral wall of the light emitting portion.

[0017] In one embodiment, there are multiple assembly protrusions, and the multiple assembly protrusions are arranged at intervals on the outer peripheral wall.

[0018] A lighting fixture comprises the TIR lens with a circumferential flange edge as described in any one of the above embodiments.

[0019] Compared with the prior art, the present disclosure has at least the following advantages:

[0020] The TIR lens and lighting fixture with the above-mentioned annular flange edge reflect and scatter the tangential light with a smaller angle overflowing the light entrance part through the convex arc surface of the inner hole, reducing the tangential light entering the light transmission part, thereby reducing the light stratification problem caused by the light emitted from the light output part; when the scattered light entering the light output part passes through the edge of the tapered concave surface, the tapered concave surface reflects the scattered light with a smaller angle, causing the scattered light to be emitted from the oblique transmission surface, further reducing the light stratification problem caused by uncontrollable scattered light emitted from the light output part, thereby making the light emitted from the light output part more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 Schematic diagram of the structure of a TIR lens with a circumferential flange edge according to one embodiment;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the TIR lens with annular flange edge;

[0024] Figure 3 for Figure 1 Another schematic diagram of the structure of the TIR lens with a cut flange edge is shown;

[0025] Figure 4 for Figure 1 The spot pattern of the TIR lens with the flange edge cut off is shown;

[0026] Figure 5 Spot pattern of an existing TIR lens. DETAILED DESCRIPTION

[0027] To facilitate understanding of the present disclosure, a more comprehensive description of the present disclosure will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. The terms used herein in the specification of this disclosure are intended only to describe specific embodiments and are not intended to limit this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure is further described in detail below with reference to specific embodiments:

[0031] like Figures 1 to 3 As shown, it is a TIR lens 10 with a circumferential flange edge according to an embodiment of the present disclosure, comprising a light input portion 100, a light transmission portion 200, and a light output portion 300 connected in sequence. The light output portion 300 is provided with a light output groove 301. The light output groove 301 is formed with a free-form surface 310. The free-form surface 310 includes a conical concave surface 311 and a light-collecting convex surface 312. The conical concave surface 311 is connected to the edge of the light-collecting convex surface 312. The light-collecting convex surface 312 and the conical concave surface 311 are both used to refract light so that the light is evenly emitted toward the front of the light output portion 300.

[0032] Furthermore, the light entrance portion 100 is provided with an inner hole 101, the inner wall of the inner hole 101 is a convex arc surface 110, and the convex arc surface 110 is used to reflect tangential light to reduce the tangential light entering the light-transmitting portion 200, and the light-transmitting portion 200 is used to pass light; the outer edge of the light exit portion 300 is provided with a beveled annular groove 302, and the beveled annular groove 302 is formed by annularly cutting the light exit portion 300 so that the outer edge of the light exit portion 300 is formed with a beveled transmission surface 320, and the beveled transmission surface 320 is used to pass scattered light.

[0033] In this embodiment, the light emitted by the light source enters the inner hole 101 from the light entrance portion 100, and the direct light entering the inner hole 101 enters the light-transmitting portion 200. The scattered light is refracted by the convex arc surface 110 and then enters the light-transmitting portion 200 from the inside of the incident portion 100. The tangential light with a smaller scattering angle is reflected by the convex arc surface 110, so that the tangential light with a smaller scattering angle overflows from the opposite direction of the light entrance portion 100; after the light passes through the light-transmitting portion 200 from the light entrance portion 100, the light enters the light exit portion 300 after passing through the light-transmitting portion 200. After the light at the center of the light exit portion 300 passes through the focusing convex surface 312, the focusing convex surface 312 refracts the light and guides it to be emitted evenly toward the front. When the scattered light with a smaller angle in the light exit portion 300 passes through the edge of the conical concave surface 311, the conical concave surface 311 reflects the scattered light with a smaller angle, so that the scattered light is emitted from the beveled transmission surface 320.

[0034] The TIR lens 10 with the annular flange edge mentioned above reflects the tangential light with a smaller scattering angle overflowing the light entrance portion 100 through the convex arc surface 110 of the inner hole 101, reducing the tangential light entering the light transmission portion 200, thereby reducing the light stratification problem caused by the light emitted from the light output portion 300; when the scattered light entering the light output portion 300 passes through the edge of the conical concave surface 311, the conical concave surface 311 reflects the scattered light with a smaller angle, causing the scattered light to be emitted from the beveled transmission surface 320, further reducing the light stratification problem caused by the uncontrollable scattered light emitted from the light output portion 300, thereby making the light emitted from the light output portion 300 more uniform.

[0035] like Figure 1 and Figure 2 As shown, in one embodiment, the concave tapered surface 311 is an inwardly concave arc structure. In this embodiment, the concave tapered surface 311 is an inwardly concave arc structure, so that the farther the light is from the center, the greater the refraction angle is. This causes the light passing through the concave tapered surface 311 to deviate toward the center, which is beneficial for controlling the light to be emitted directly in front of the light-emitting portion 300.

[0036] like Figure 1 As shown, in one embodiment, the beveled transmission surface 320 is disposed parallel to the conical concave surface 311. In this embodiment, the beveled transmission surface 320 is parallel to the conical concave surface 311, so that more light reflected from the concave concave surface 311 is emitted perpendicularly from the beveled transmission surface 320, reducing the impact of the beveled transmission surface 320 on the reflected light, thereby reducing the light stratification problem caused by the light emitted from the light exit portion 300 of the TIR lens 10 with a circumferential flange.

[0037] like Figure 2 As shown in one embodiment, the surface of the conical concave surface 311 is provided with a plurality of first protrusions 3111. In this embodiment, the first protrusions 3111 can break the single propagation path of light emitted from the conical concave surface 311 in the light-emitting portion 300, scattering the light in multiple directions, thereby achieving uniform light distribution. The multiple protrusions help disperse the light, making the emitted light more uniform and soft.

[0038] like Figure 2 As shown in one embodiment, the surface of the light-concentrating convex surface 312 is provided with a plurality of second protrusions 3121. In this embodiment, the second protrusions 3121 can change the propagation path of light, causing the light to scatter in multiple directions, thereby avoiding excessive concentration or loss of light in a certain area, thereby ensuring that the light is evenly dispersed and softly emitted from the light-concentrating convex surface 312.

[0039] like Figure 1As shown, in one embodiment, a circular arc protrusion 210 is provided on a side of the light-transmitting portion 200 facing away from the light-emitting portion 300, and the circular arc protrusion 210 is located within the inner hole 101. In this embodiment, the circular arc protrusion 210 is used to guide light. When light enters the inner hole 101 from the light-entering portion 100 of the lens, the shape of the circular arc protrusion 210 can guide the light to propagate along a specific path, thereby allowing the light to converge more smoothly through the light-transmitting portion 200.

[0040] like Figure 1 and Figure 3 As shown, in one embodiment, the inner wall of the inner hole 101, which is away from the light-transmitting portion 200, is connected to the outer wall of the light-entering portion 100. In this embodiment, the inner hole 101 can collect light. The inner hole 101 is connected to the outside of the light-entering portion 100, so that the light-entering portion 100 occupies less space, thereby improving the utilization rate of light.

[0041] like Figure 2 and Figure 3 As shown, in one embodiment, the flange-cut TIR lens 10 further includes an assembly protrusion 400 connected to the outer peripheral wall of the light-emitting portion 300. In this embodiment, the flange-cut TIR lens 10 is injection molded, and the assembly protrusion 400 can be ejected from the mold and adapted to the position of the injection molding inlet. When assembled in the lighting fixture, the assembly protrusion 400 can also be precisely positioned and fixed, thereby reducing the risk of optical performance degradation caused by improper assembly of the flange-cut TIR lens 10.

[0042] like Figure 3 As shown, in one embodiment, there are multiple assembly protrusions 400, and the multiple assembly protrusions 400 are spaced apart on the outer peripheral wall. In this embodiment, the multiple assembly protrusions 400 further improve the assembly accuracy of the TIR lens 10 with a cut flange edge, thereby ensuring that the TIR lens 10 with a cut flange edge is positioned and has a better light output effect.

[0043] The present application also provides a lighting fixture, including the TIR lens 10 with a cut flange edge as described in any of the above embodiments. In this embodiment, the convex arc surface 110 of the TIR lens 10 with a cut flange edge reflects off the tangential light entering the light-transmitting portion 200, and the conical surface of the TIR lens 10 with a cut flange edge reduces uncontrollable scattered light, thereby reducing the light stratification problem caused by the light emitted from the light-emitting portion 300.

[0044] Compared with the prior art, the present disclosure has at least the following advantages:

[0045] The TIR lens 10 and lighting fixture with the above-mentioned annular flange edge reflect the tangential light with a smaller scattered angle overflowing the light input portion 100 through the convex arc surface 110 of the inner hole 101, reducing the tangential light entering the light-transmitting portion 200, thereby reducing the light stratification problem caused by the light emitted from the light output portion 300; when the scattered light entering the light output portion 300 passes through the edge of the conical concave surface 311, the conical concave surface 311 reflects the scattered light with a smaller angle, causing the scattered light to be emitted from the beveled transmission surface 320, further reducing the light stratification problem caused by uncontrollable scattered light emitted from the light output portion 300, thereby making the light emitted from the light output portion 300 more uniform.

[0046] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosed patent shall be determined by the appended claims.

Claims

1. A TIR lens with a circumferential flange edge, comprising a light input portion, a light transmission portion, and a light output portion connected in sequence, wherein the light output portion defines a light output groove, the light output groove forms a free-form surface, the free-form surface comprising a conical concave surface and a light-focusing convex surface, the conical concave surface being connected to an edge of the light-focusing convex surface, the light-focusing convex surface and the conical concave surface both being used to refract and guide light, characterized in that: The light incident portion is provided with an inner hole, the inner wall of the inner hole is a convex arc surface, the convex arc surface is used to reflect tangential light to reduce the tangential light entering the light-transmitting portion, and the light-transmitting portion is used to pass light; The outer edge of the light emitting portion is beveled to form a beveled annular groove, so that the outer edge of the light emitting portion is provided with a beveled transmission surface, and the beveled transmission surface is used to transmit scattered light.

2. The TIR lens with annular flange according to claim 1, wherein: The conical concave surface is an inwardly concave arc surface structure.

3. The TIR lens with an annular flange according to claim 2, wherein: The obliquely cut transmission surface is arranged parallel to the conical concave surface.

4. The TIR lens with a circumferential flange according to claim 1, wherein: A plurality of first convex points are convexly provided on the surface of the conical concave surface.

5. The TIR lens with a circumferential flange according to claim 4, wherein: A plurality of second convex points are convexly provided on the surface of the light-concentrating convex surface.

6. The TIR lens with a circumferential flange according to claim 1, wherein: A circular arc protrusion is provided on a side of the light-transmitting portion away from the light-emitting portion, and the circular arc protrusion is located in the inner hole.

7. The TIR lens with a circumferential flange according to claim 1, wherein: An end of the inner wall of the inner hole away from the light-transmitting portion is connected to the outer wall of the light-incident portion.

8. The TIR lens with a circumferential flange according to claim 1, wherein: The TIR lens with the annular flange edge further includes an assembly protrusion, and the assembly protrusion is connected to the outer peripheral wall of the light output portion.

9. The TIR lens with a circular cut flange according to claim 8, wherein: There are multiple assembly protrusions, and the multiple assembly protrusions are arranged at intervals on the outer peripheral wall.

10. A lighting fixture, characterized in that: A TIR lens comprising the annular flange edge according to any one of claims 1 to 9.

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