CN209744286U - LED lens - Google Patents

Abstract

The embodiment of the utility model provides a LED lens, including the lens main part, the chamber that holds that is used for holding the LED light source is offered to the bottom surface of lens main part, and the side of lens main part is formed with the total reflection face around holding the chamber, and the chamber wall that holds the chamber is the incident face of lens main part, and the top surface of lens main part is the emergent face, and the light of the inside directive emergent face of lens main part takes place the refraction and jets out or reflect in emergent face department, and the side of lens main part still is equipped with to encircle hold the annular in the chamber outside and be located the diffuse reflection face in the annular outside, the lateral wall that leans on to hold chamber one side of annular constitutes the total reflection face, and the diffuse reflection face makes the light that shines at the diffuse reflection face take place the diffuse reflection and the emergent face, and the light formation divergence angle that takes place the refraction. The embodiment can form light beams with divergence angles smaller than or equal to 12 degrees, and form light spots with uniform light mixing; in addition, the thickness of the lens body can be controlled within 6 mm, and the volume of the LED lens is smaller.

Description

LED lens

Technical Field

The embodiment of the utility model provides a relate to LED technical field, especially relate to a LED lens.

Background

In order to realize a small angle in the original size range, the LED lamp often uses a TIR (Total Internal Reflection) lens to directly control light, and when light enters the TIR lens from an air medium, all the light is reflected by the TIR lens. However, in order to reduce the divergence angle of the light beam and make the light spot formed by the LED lamp uniform, the conventional TIR lens is designed to have a larger thickness, so that the production cost is higher, resulting in a larger size and weight of the whole LED lamp.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem that will solve provides a LED lens, can effectively obtain the divergence angle of small angle, reduces the thickness of LED lens simultaneously.

In order to solve the technical problem, an embodiment of the utility model provides a following technical scheme: an LED lens comprises a lens body, wherein a containing cavity used for containing an LED light source is formed in the bottom surface of the lens body, a total reflection surface is formed on the side surface of the lens body surrounding the containing cavity, the cavity wall of the containing cavity is an incident surface of the lens body, the top surface of the lens body is an emergent surface, light rays emitted to the emergent surface in the lens body are refracted at the emergent surface and then emitted or reflected, a ring groove surrounding the outer side of the containing cavity and a diffuse reflection surface located at the outer side of the ring groove are further arranged on the side surface of the lens body, the side wall of the ring groove close to the containing cavity forms the total reflection surface, the diffuse reflection surface enables the light rays irradiated to the diffuse reflection surface to be emitted to the emergent surface, and the light rays refracted at the emergent surface form light beams with divergence angles smaller than or equal to 12 degrees.

Furthermore, the diffuse reflection surface is composed of a plurality of convex edge stripes which are uniformly and symmetrically distributed in a radial shape around the ring groove.

Furthermore, the rib stripes become thicker gradually from the inner end to the outer end.

Furthermore, the top surface and the side wall of the accommodating cavity are connected by an annular convex arc surface protruding towards the inside of the accommodating cavity.

Further, the outer edge of the exit surface of the lens body is integrally formed with a bracket surrounding the outer side of the diffuse reflection surface.

Further, the support is provided with a ventilation through hole which is communicated with the top surface and the bottom surface of the lens main body.

Furthermore, a clasp for buckling with a corresponding mounting substrate is protruded at the tail end of the bracket.

After the technical scheme is adopted, the embodiment of the utility model provides an at least, following beneficial effect has: the embodiment of the utility model provides a through set up the annular in the side of lens main part, and encircle the annular set up diffuse reflection face again, LED light source from the refraction of lens main part through after the diffuse reflection of diffuse reflection face refracts from the top surface of lens main part again and goes out, can form the light beam that the divergence angle is less than or equal to 12 degrees, moreover through the outgoing face with the mutual cooperation of diffuse reflection face, can make the light beam fully mix, form the even facula of muddy light; in addition, specific experiments show that when the divergence angle of the light beam is kept to be less than or equal to 12 degrees, the thickness of the lens body can be controlled to be within 6 millimeters, the thickness of the LED lens is greatly reduced, the production cost is low, and the volume of the LED lens is smaller.

Drawings

Fig. 1 is a schematic perspective view of an alternative embodiment of the LED lens of the present invention.

Fig. 2 is a schematic bottom view of an alternative embodiment of the LED lens of the present invention.

Fig. 3 is a schematic diagram illustrating the principle of light used in an alternative embodiment of the LED lens of the present invention.

Detailed Description

The present application will now be described in further detail with reference to the accompanying drawings and specific examples. It is to be understood that the following illustrative embodiments and description are only intended to illustrate the present invention, and are not intended to limit the present invention, and features in the embodiments and examples may be combined with each other in the present application without conflict.

As shown in fig. 1-3, an embodiment of the present invention provides an LED lens, including a lens body 1, a receiving cavity 10 for receiving an LED light source 3 is opened on a bottom surface of the lens body 1, a total reflection surface 12 is formed on a side surface of the lens body 1 surrounding the receiving cavity 10, a cavity wall of the receiving cavity 10 is an incident surface of the lens body 1, a top surface of the lens body 1 is an emergent surface, light emitted to the emergent surface inside the lens body 1 is refracted at the emergent surface and emitted or reflected, a ring groove 14 surrounding the receiving cavity 10 and a diffuse reflection surface 16 located outside the ring groove 14 are further provided on the side surface of the lens body 1, a groove side wall of the ring groove 14 close to the receiving cavity 10 constitutes the total reflection surface 12, the diffuse reflection surface 16 makes light irradiated to the diffuse reflection surface 16 and emitted to the emergent surface, the light rays refracted at the exit surface form a light beam having a divergence angle of 12 degrees or less. In the embodiment as in fig. 3, the dashed lines in the figure represent the light paths.

The embodiment of the utility model provides a through set up annular 14 in the side of lens main part 1, and encircle annular 14 sets up diffuse reflection face 16 again, LED light source 3 from lens main part 1 refraction come through after diffuse reflection face 16 refracts from the top surface of lens main part 1 again, can form the light beam that the divergence angle is less than or equal to 12 degrees, and through the cooperation of emergence face with diffuse reflection face 16, can make the pencil of light fully mix, form the even facula of mixed light; in addition, specific experiments show that when the divergence angle of the light beam is kept to be less than or equal to 12 degrees, the thickness of the lens body 1 can be controlled to be within 6 millimeters, the thickness of the LED lens is greatly reduced, the production cost is low, and the volume of the LED lens is smaller.

In one embodiment of the invention, the diffuse reflecting surface 16 is formed by a plurality of rib stripes 161 uniformly and symmetrically radially distributed around the ring groove 14. In this embodiment, the annular groove 14 is surrounded by the radially uniform and symmetrical rib stripes, so that the uneven diffuse reflection surface 16 can be formed, light beams can be effectively and diffusely reflected to the emergent surface, and the processing is also convenient.

In one embodiment of the present invention, the rib stripe 161 is gradually thicker from the inner end to the outer end. In this embodiment, the rib stripe 161 becomes thicker gradually from the inner end to the outer end, and since the inner end to the outer end is away from the LED light source 3 gradually, the inner end and the outer end of the rib stripe 161 can have the same effect when performing diffuse reflection on the light beam emitted from the LED light source 3 according to the distribution from thin to thick.

In one embodiment of the present invention, the top surface and the side wall of the accommodating chamber 10 are connected by an annular convex arc surface 18 protruding toward the inside of the accommodating chamber 10. This embodiment will hold and adopt between the top surface of chamber 10 and the lateral wall to set up to the linking of cyclic annular convex circular arc 18, has increased the interior surface area who holds chamber 10, can effectively improve the utilization ratio to light.

In an embodiment of the present invention, the outer edge of the exit surface of the lens body 1 is further integrally formed with a bracket 5 surrounding the outer side of the diffuse reflection surface 16, which can effectively support and protect the lens body 1.

In an embodiment of the present invention, the holder 5 is provided with a ventilation through hole 50 communicating the top surface and the bottom surface of the lens body 1. This embodiment is through setting up ventilative through-hole 50, can effectively dispel the heat of 3 during operations of LED light source, improves the life of LED lamps and lanterns.

In an embodiment of the present invention, the end of the bracket 5 is further protruded with a clasp 52 for fastening with the corresponding mounting substrate 7. This embodiment is through setting up clasp 52, and is convenient the utility model discloses the installation of LED lens is counterpointed, and is very convenient. In particular implementation, the mounting substrate 7 may be a circuit board or other substrate for fixing the LED lens.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, and these forms are within the scope of the present invention.

Claims (7)

1. An LED lens comprises a lens main body, wherein the bottom surface of the lens main body is provided with an accommodating cavity for accommodating an LED light source, the side surface of the lens main body surrounds the containing cavity to form a total reflection surface, the cavity wall of the containing cavity is an incident surface of the lens main body, the top surface of the lens main body is an emergent surface, light rays emitted to the emergent surface from the inside of the lens main body are refracted at the emergent surface and then emitted or reflected, it is characterized in that the side surface of the lens main body is also provided with a ring groove surrounding the outer side of the containing cavity and a diffuse reflection surface positioned on the outer side of the ring groove, the side wall of the groove close to the containing cavity of the ring groove forms the total reflection surface, the diffuse reflection surface causes the light irradiated on the diffuse reflection surface to generate diffuse reflection and emit the light to the emergent surface, the light rays refracted at the exit surface form a light beam having a divergence angle of 12 degrees or less.

2. The LED lens of claim 1 wherein the diffusive reflective surface is formed by a plurality of uniformly radially symmetrically distributed rib stripes surrounding the annular groove.

3. The LED lens of claim 2 wherein the ribbed stripe is progressively thicker from the inner end to the outer end.

4. The LED lens of claim 1, wherein the top surface and the side wall of the receiving cavity are joined by an annular convex arc surface that protrudes toward the inside of the receiving cavity.

5. The LED lens of claim 1 wherein the outer edge of the exit surface of the lens body further integrally forms a shelf around the outer side of the diffusive reflective surface.

6. The LED lens of claim 5, wherein the support frame is provided with a gas-permeable through hole communicating the top surface and the bottom surface of the lens body.

7. The LED lens of claim 5, wherein the end of the support further protrudes with a clasp for engaging with a corresponding mounting substrate.