CN210219641U

CN210219641U - LED lens

Info

Publication number: CN210219641U
Application number: CN201921476757.2U
Authority: CN
Inventors: Xiaofei Wang; 王小飞; Xiaoqing Li; 李小庆
Original assignee: Shenzhen Ex Lighting Technology Holdings Co Ltd
Current assignee: Shenzhen Ex Lighting Technology Holdings Co Ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-03-31
Anticipated expiration: 2029-09-02

Abstract

The embodiment of the utility model provides a LED lens, thick including being the top, the thin back taper platform form's in bottom lens main part, the bottom surface middle part of lens main part is to the sunken chamber that holds that is used for holding the LED light source of formation of top surface direction, the chamber wall that holds the chamber is the incident face of lens main part, the side of lens main part is the total reflection face, the top surface of lens main part is the emitting surface, it is the rectangular form that length is greater than the width to receive the spool and hold the chamber, it is the smooth curved surface that the equal symmetry of well axial surface on chamber length direction and the width direction set up for receiving the spool to receive the spool total reflection face, arbitrary size that is on a parallel with the cross section of lens main part bottom surface holding chamber length direction of receive spool total reflection face is greater than the size of receiving the spool. The embodiment enables the length direction of the lens main body to correspond to the length direction of the LED light-emitting chips arranged in the long strip shape, and the center of each LED light-emitting chip is superposed with the center of the longitudinal section in the width direction, so that light mixing and condensation can be better realized.

Description

LED lens

Technical Field

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

Background

The existing LED lamp is used for mixing light, an LED lens is usually arranged outside an LED light source to converge light, and the emitted light is better mixed through the condensation effect of the lens. The conventional LED lens generally adopts a rotationally symmetric total reflection lens to condense light, but when the LED light source is formed by arranging LED light emitting chips arranged in a long strip shape, the center offset between the LED light emitting chip at the center of the LED lens and the LED light emitting chip at the peripheral edge is relatively large, so that the light exit angles between the LED light emitting chips at the outer edge and the LED light emitting chips close to the center have relatively large difference, which results in low light condensing efficiency and poor final light mixing effect.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem that will solve lies in, provides a LED lens, has good mixed light effect to the LED light source that is the LED chip of rectangular form arranging.

In order to solve the technical problem, an embodiment of the utility model provides a following technical scheme: the utility model provides a LED lens, is including being the thick, thin back taper's in bottom lens main part in top, the bottom surface middle part of lens main part is sunken to the top surface direction and is formed the chamber that holds that is used for holding the LED light source, the chamber wall that holds the chamber does the incident surface of lens main part, the side of lens main part is the total reflection face, the top surface of lens main part is the emitting surface, it is the rectangular form that length is greater than the width to hold the chamber, the total reflection face be for hold the smooth curved surface that the equal symmetry of the well axial plane in chamber length direction and the width direction set up, the arbitrary size that is on holding chamber length direction that is on a parallel with the cross section of lens main part bottom surface of total reflection face is greater than the cross section is holding the size on the chamber.

Further, the emergent surface is a round-corner rectangle or an ellipse-like plane.

Furthermore, the top surface of the accommodating cavity is a plane or an arc surface protruding towards the inside of the accommodating cavity.

Furthermore, the LED lens also comprises a bracket which surrounds the outer side of the emergent surface of the lens main body and is connected with the top edge of the lens main body into a whole by the top end.

Furthermore, the bottom end face of the support is also provided with a positioning column protruding from the bottom end face.

Furthermore, a heat dissipation air duct communicated with the inside and the outside of the support is further arranged on the bottom end face of the support.

Further, the bracket is cylindrical, and the bottom end edge of the bracket is provided with an outward-turned flange.

Further, the bottom surface of the lens main body is flush with the bottom end surface of the support or is positioned on the inner side of the bottom end surface of the support.

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 has the advantages that the containing cavity is in the shape of a strip with the length larger than the width, so that the containing cavity can be effectively assembled with an LED light source consisting of LED light-emitting chips arranged in the shape of a strip; the total reflection surface is a smooth curved surface which is symmetrically arranged relative to the middle axial surface in the length direction and the middle axial surface in the width direction of the accommodating cavity, and the light convergence effect is good; and the size of any cross section of the total reflection surface parallel to the bottom surface of the lens body in the length direction of the accommodating cavity is larger than the size of the cross section in the width direction of the accommodating cavity, so that the length direction of the lens body corresponds to the length direction of the LED light-emitting chips arranged in a long strip shape, and the center of each LED light-emitting chip is superposed with the center of the longitudinal section in the width direction, so that the light-emitting angle difference of the light emitted by each LED light-emitting chip after being refracted by the total reflection surface is smaller, and better light mixing and condensation can be realized.

Drawings

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

Fig. 2 is a schematic cross-sectional view of an alternative embodiment of the LED lens of the present invention along the length direction of the medial surface.

Fig. 3 is a schematic cross-sectional view of an alternative embodiment of the LED lens of the present invention along the width direction central axis.

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 to 3, the present invention provides an LED lens, which includes a lens body 1 in the shape of an inverted frustum with a thick top end and a thin bottom end, the middle part of the bottom surface of the lens body 1 is sunken towards the direction of the top surface to form an accommodating cavity 10 for accommodating the LED light source 3, the wall of the accommodating cavity 10 is an incident surface 12 of the lens body 1, the side surface of the lens body 1 is a total reflection surface 14, the top surface of the lens body 1 is an emergent surface 16, the accommodating cavity 10 is in a strip shape with the length being larger than the width, the total reflection surface 14 is a smooth curved surface symmetrically arranged with respect to both the central axis surface in the length direction and the central axis surface in the width direction of the accommodating chamber 10, the dimension of any cross section of the total reflection surface 14 parallel to the bottom surface of the lens body 1 in the length direction of the accommodating cavity 10 is larger than the dimension of the cross section in the width direction of the accommodating cavity 10.

The embodiment of the utility model has the advantages that the accommodating cavity 10 is in the shape of a strip with the length larger than the width, and can be effectively assembled with the LED light source 3 consisting of LED light-emitting chips arranged in the shape of a strip; the total reflection surface 14 is a smooth curved surface symmetrically arranged relative to the central axis surface in the length direction and the central axis surface in the width direction of the accommodating cavity 10, and has a good light convergence effect; and the size of any cross section of the total reflection surface 14 parallel to the bottom surface of the lens body 1 in the length direction of the accommodating cavity 10 is larger than the size of the cross section in the width direction of the accommodating cavity 10, so that the length direction of the lens body 1 corresponds to the length direction of the LED light-emitting chips arranged in a long strip shape, and the center of each LED light-emitting chip is superposed with the center of the longitudinal section in the width direction, therefore, the light-emitting angle difference of the light emitted by each LED light-emitting chip after being refracted by the total reflection surface 14 is smaller, and better light mixing and condensation can be realized.

In an alternative embodiment of the present invention, the exit surface 16 is a rounded rectangle or an elliptical-like plane. The exit surface 16 of the present embodiment is a rounded rectangle or an ellipse-like shape, which not only can realize the structure of the lens body 1, but also saves more material and reduces the occupied volume during manufacturing and production. In the embodiment of fig. 1 to 3, the exit surface 16 is an elliptical-like plane; in addition, the exit surface 16 is a plane, so that the light emitted from the exit surface 16 is uniformly distributed, the glare value is reduced, and the light pollution is reduced.

In another alternative embodiment of the present invention, as shown in fig. 3, the end surface of the accommodating chamber 10 close to the exit surface 16 is a plane or a circular arc surface recessed into the accommodating chamber 10. This embodiment establishes to the concave arc surface to holding chamber 10 inside through the terminal surface that will hold chamber 10 and lean on 16 one end of emitting surface, can effectively improve the interior surface area that holds chamber 10 and receive the efficiency that the light that LED light source 3 sent in order to improve and hold chamber 10, improve the utility model discloses LED lens's light utilization ratio.

In a further alternative embodiment of the present invention, the LED lens further comprises a support 5 surrounding the outer side of the exit surface 16 of the lens body 1 and integrally connected with the top edge of the lens body 1 at the top end. This embodiment can support and protect the lens body 1 by integrally forming the holder 5 around the outside of the total reflection surface 14 at the outer edge of the lens body 1.

In an alternative embodiment of the present invention, the bottom end surface of the support 5 is further provided with a positioning column 50 protruding from the bottom end surface. This embodiment is through the convex reference column 50 in support 5 bottom end face, and the support 5 of being convenient for assembles with the mounting circuit board 7 of LED light source 3, effectively realizes the location.

In an alternative embodiment of the present invention, the bottom end surface of the support 5 is further provided with a heat dissipation air duct 52 communicating the inside and the outside of the support 5. This embodiment is through setting up heat dissipation wind channel 52, and the air can conveniently pass through heat dissipation wind channel 52 business turn over support 5, has improved the mobility of air, can effectually dispel the heat that is located the inside LED light source 3 during operation of support 5 and produces, makes LED light source 3 keep at suitable operating temperature, can effectively prolong the life of LED lamps and lanterns. In the embodiment, as shown in fig. 1, the heat dissipation duct 52 is a notch formed on the bottom edge of the bracket 5.

In an alternative embodiment of the invention, the support 5 is cylindrical and the bottom edge is formed with an outwardly turned flange 54. In the embodiment, the support 5 is arranged in a cylindrical shape and matched with the shape of the lens main body 1, so that the volume of the LED lens is reduced, and the outwards-turned flange 54 is arranged at the bottom end edge of the support 5, so that the contact area between the support 5 and the corresponding mounting circuit board 7 of the LED light source 3 is increased, and the LED lens is more stable during mounting.

In an optional embodiment of the present invention, the bottom surface of the lens body 1 is flush with the bottom end surface of the support 5 or is located inside the bottom end surface of the support 5. In this embodiment, the bottom edge of the lens body 1 is accommodated inside the bottom edge of the support 5 or flush with the bottom end surface of the support 5, so that the support 5 can better support and protect the lens body 1, and the lens body 1 is more stable during installation. In the embodiment shown in fig. 1-3, the bottom end edge of the lens body 1 and the bottom end edge of the support 5 are located on two mutually parallel planes respectively and the bottom end edge of the lens body 1 is closer to the top surface of the lens body 1.

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

1. The utility model provides a LED lens, is including being the thick, thin back taper's in bottom lens main part in top, the sunken chamber that holds that is used for holding the LED light source that forms of top surface direction in the bottom surface middle part of lens main part, the chamber wall that holds the chamber does the incident surface of lens main part, the side of lens main part is the total reflection face, the top surface of lens main part is the emitting surface, its characterized in that, it is the rectangular form that length is greater than the width to hold the chamber, the total reflection face be for hold the smooth curved surface that the equal symmetry of the well axial surface in chamber length direction and the width direction set up, the arbitrary size that is on holding chamber length direction that is on a parallel with the cross section of lens main part bottom surface of total reflection face is greater than the size of cross section on holding chamber width direction.

2. The LED lens of claim 1 wherein the exit face is a rounded rectangular or oval-like flat surface.

3. The LED lens of claim 1, wherein the top surface of the receiving cavity is a flat surface or a circular arc surface protruding toward the inside of the receiving cavity.

4. The LED lens of claim 1 further comprising a support surrounding the outside of the exit surface of the lens body and integrally joined at a top end to a top edge of the lens body.

5. The LED lens of claim 4, wherein the bottom surface of the support further comprises a positioning post protruding from the bottom surface.

6. The LED lens of claim 4, wherein the bottom surface of the frame further comprises a heat dissipation duct connecting the inside and outside of the frame.

7. The LED lens of claim 4 wherein the holder is cylindrical and has a bottom edge formed with an out-turned flange.

8. The LED lens of claim 4 wherein the bottom surface of the lens body is flush with or inside the bottom end face of the support.