CN210004315U

CN210004315U - LED module lens

Info

Publication number: CN210004315U
Application number: CN201920626755.0U
Authority: CN
Inventors: 许敏; 吴方园; 樊亚鹏
Original assignee: Shanghai Wisdom Core Lighting Technology Co Ltd
Current assignee: Shanghai Wisdom Core Lighting Technology Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-01-31
Anticipated expiration: 2029-04-30

Abstract

The utility model provides an LED module lens, including the lens body with enclose the outside of establishing on lens body lower extreme circle, lens body bottom indent forms interior curved surface portion, top evagination forms outer curved surface portion, the LED light source is arranged in under the interior curved surface portion, outer curved surface portion are symmetry in C0-180 orientation, interior curved surface portion, outer curved surface portion are asymmetric in C90-270 orientation, and the outer curved surface portion is in C90-270 orientation the far light plane's of far light normal line and the contained angle of lens body's optical axis more than or equal to 15.26, and the lens body is at C90-270 grading angle more than or equal to 72.02 in the orientation, the utility model provides a lens can use to go out the street lamp that covers two-way eight lanes, and the utility model discloses through add the outside that is equipped with circles around the lens body, this outside is used for the installation of lens, designs into regular figure to be convenient for the installation of lens, and guarantee the atress of lens, sealed and the light energy homogeneity of lens installation all around.

Description

LED module lens

Technical Field

The utility model relates to a lighting device technical field especially relates to kinds of LED module lens.

Background

The lens is an essential electrical component in the LED module, and is closely connected with the LED light source at to improve the use efficiency and the luminous efficiency of light.

The lens in the existing LED module has the following problems: 1. the use of roads with more than six bidirectional lanes cannot be met; 2. because the existing lens has an irregular structure, the installation and sealing of the periphery of the lens are inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the background art, the utility model provides LED module lenses, which comprises a lens body and an outer edge arranged on a circle at the lower end of the lens body, wherein the bottom of the lens body is concave inwards to form an inner curved surface part, the top of the lens body is convex outwards to form an outer curved surface part, and an LED light source is arranged under the inner curved surface part;

the inner curved surface part and the outer curved surface part are symmetrical in the direction of C0-180 degrees;

the inner curved surface part and the outer curved surface part are asymmetric in the C90-270 degree direction, the included angle between the normal of the far light-gathering surface of the outer curved surface part in the C90-270 degree direction and the optical axis of the lens body is larger than or equal to 15.26 degrees, and the light distribution angle of the lens body in the C90-270 degree direction is larger than or equal to 72.02 degrees.

Preferably, the inner curved surface portion is eccentric in a direction of C90-270 with respect to the outer curved surface portion.

Preferably, the height of the inner curved surface part is 7.9 mm.

Preferably, the outer edge is integrally formed with the lens body .

Preferably, the outer edge is circular.

Preferably, a positioning fool-proof structure is arranged on the upper outer surface, and the positioning fool-proof structure is opposite to the middle position of the lens body in the C90-270 degrees direction.

Preferably, the outer upper surface is further provided with arrow indicating structures, and the arrow indicating structures and the positioning fool-proof structures are located on two opposite sides of the lens body.

The utility model discloses owing to adopt above technical scheme, make it compare with prior art, have following advantage and positive effect:

the utility model provides a LED module lens, the interior curved surface portion 101 of lens body 1, outer curved surface portion 102 are designed into the eccentric type at C90-270, simultaneously, to the eccentric angle more than or equal to 15.26 of the grading angle more than or equal to 72.02 of lens body and outer curved surface portion C90-270 orientation, be the biggest part of curved surface slope change to make this lens can utilize out in the middle of the street lamp that light energy covered eight lanes, moreover the utility model discloses still add the outside that is equipped with circles around the lens body, this outside is used for the installation of lens, designs the outside into regular figure, thereby the installation of the lens of being convenient for, sealed and guarantee lens and install the homogeneity of atress all around.

Drawings

The above and other features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic view of an LED module lens provided by the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic view of the present invention showing the light emitted from the lens on the road;

fig. 5 is a schematic view of the lens installed on the LED module according to the present invention.

Detailed Description

The invention will be described in more detail hereinafter with reference to the accompanying drawings showing embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.

Referring to fig. 1-3, the utility model provides an kinds of LED module lens, including lens body 1 and the outer edge 2 of enclosing in lens body 1 lower extreme circle, lens body 1 bottom indent forms interior curved surface portion 101, the top evagination forms outer curved surface portion 102, LED light source 5 is placed in the interior curved surface portion 101 under, wherein, interior curved surface portion 101, outer curved surface portion 102 are at C0 ° -180 ° orientation symmetry, as shown in fig. 2, interior curved surface portion 101, outer curved surface portion 102 are at C90 ° -270 ° orientation asymmetry, as shown in fig. 3, and outer curved surface portion 102 is at C90 ° -270 ° orientation far away the contained angle α 'of condensing surface and lens body's optical axis more than or equal to 15.26 °, and lens body 1 light distribution angle more than or equal to 72.02 ° in C90 ° -270 ° orientation.

The utility model provides a LED module lens, with the interior curved surface portion 101 of lens body 1, outer curved surface portion 102 design for the eccentric type at C90-270, simultaneously, to the grading angle more than or equal to 72.02 of lens body and the eccentric angle more than or equal to 15.26 of outer curved surface portion C90-270 orientation, the biggest part of curved surface slope change this moment to make this lens can utilize out in the middle of the street lamp that light energy covered eight lanes, moreover the utility model discloses still through add the outside that is equipped with circles around the lens body, this outside is used for the installation of lens, designs the outside into regular figure, thereby is convenient for the installation of lens, seals and guarantees the homogeneity of lens installation atress all around.

In the present embodiment, when the LED module lens is applied to a street lamp, the C0-180 direction is defined as the direction along the road.

In this embodiment, the inner curved surface portion 101 and the outer curved surface portion 102 may be configured to distribute light according to specific needs, and are not limited herein. The specific light distribution mode is as follows:

(1) the mathematical model of the light distribution of the upper surface in the direction of C0-C180 degrees is shown in FIG. 2.

According to the law of refraction of the position of the point Q on the bottom curve EF, there are

sin(θ-α)＝nsin[(π/2)-α-θ′]

sinθcosα-cosθsinα＝ncos(α+θ′)

sinθcosα-cosθsinα＝ncosαcosθ′-nsinαsinθ′

tanα＝(sinθ-nsinθ′)/(cosθ-nsinθ′) (1)

In the formula, θ' is an included angle between a horizontal line JK and an emergent ray QP, α is an included angle between a normal MN and a vertical line CD, θ is an emergent angle of the LED, and n is a refractive index of the lens material.

According to the law of refraction of the position of P (x, y) point, the following relation is given:

nsinδ＝sinγ (2)

in fig. 2, ∠ CQP is ∠ QPD, so the following formula is given:

Π/2-0′＝δ+β (3)

obtained from (3) formula β ═ pi/2-theta' -delta (4)

Again according to the relationship between the derivative of the curve AB and the tangent angle function of the tangent PT:

tanβ＝dy/dx (5)

in conjunction with equations (1) to (5), the numerical coordinates of curve AB in fig. 2 can be calculated in turn by an iterative integration method.

(2) The light rays distributed in the forward direction of the road in the direction of C90-270 degrees (perpendicular to the road direction) are mathematically modeled as shown in FIG. 3 for the light distribution of the upper surface in the direction of C90-C270.

According to the law of refraction of the position of a P point on a curve MN, the following are provided:

n sinα＝sinβ (1)

where n is the refractive index of the lens material, α is the angle of incidence of the light ray, and β is the angle of refraction of the light ray.

From fig. 3, the relation:

∠TPO＝π/2-α+π/2+β (2)

∠TPO＝arc tan[(s-rcosθ)/(h-rsinθ)]+π/2+θ (3)

coupled formula (2) and formula (3), solved to β, with formula (1), gives:

α＝sin[π/2-θ-arc tan(s-rcosθ)/(h-rsinθ)]/n-cos[π/2-θ-arctan(s-rcosθ)/(h-rsinθ)](4)

the tilt angle at point P is delta from figure 3,

δ＝π/2-α-θ (5)

and the slope k at point P is tan δ, we can obtain:

K＝tan[π/2-θ-sin[π/2-θ-arc tan(s-rcosθ)/(h-rsinθ)]/n-cos[π/2-θ-arctan(s-rcosθ)/(h-rsin θ)]](6)

from the equation (6), knowing the included angle θ between the light-emitting angle of the light and the horizontal plane, the width of the irradiation spot on the road surface is required to be s and the irradiation height is required to be h, and setting r, namely the distance between the point p of the lens and the origin o, the slope of the curve of the lens curve at the point p can be determined, and the curve can be drawn through three points MPN.

In this embodiment, the inner curved surface part 101 and the outer curved surface part 102 of the lens body 1 are designed to be eccentric in the direction of C90-270 °, and the light distribution angle of the lens body is limited, so that the lens can meet the illumination of eight lanes when being applied to a road street lamp.

Specifically, referring to fig. 4, the width of the motor vehicle lane of the urban main road is 3.5m, the width of the bidirectional 8 lanes is 28m, the width of the unidirectional lane is 14m, the height of the lamp is 12m, and the elevation angle allowable range of the street lamp is (less than or equal to 15 °).

Assuming an eccentricity angle of α', a distance S of the center projected road edge of the lamp and a height of H, the following formula is given:

α’＝arc tan(7/12)，

α’＝30.26°

if the lamp is placed horizontally, the light intensity deflection angle is needed, and according to the standard, the eccentric standard deflection angle which is reached within 15 degrees of the elevation angle needs to be at least 15.26 degrees. Therefore, the far light-gathering surface is the part with the maximum slope change of the light-emitting surface, and the included angle between the normal of the curved surface of the far light-gathering surface and the optical axis of the lens is at least 15.26 degrees.

For the diffusion angle B (i.e., the light distribution angle) of the lens body 1 in the direction of C90 ° -C270 °, the forward distance is S1 and the backward distance is S2, which are calculated as follows:

S1＝14，S2＝5，H＝12；

B1＝arc tan(S1/H)，

B1＝49.40°

B2＝arc tan(S2/H)，

B2＝22.62°

B＝B1+B2＝72.02

as can be seen from the above formula, the lens has an axial surface diffusion angle of not less than 72.02 degrees at C90-C270 degrees.

Combining all the above calculation formulas to obtain: the eccentric angle of C90-C270 degrees is more than or equal to 15.26 degrees, the divergence angle of C90-270 degrees is 72.02 degrees, and the maximum divergence angle can meet the 8-lane design.

In this embodiment, the inner curved surface portion is offset from the outer curved surface portion in the direction of C90-270, so that the light is more deflected toward the distant light-collecting surface for illuminating the forward illumination direction of the road.

In the present embodiment, the height of the inner curved surface portion 101 is preferably 7.9mm, and the present embodiment can make the size of the lens be reduced appropriately while ensuring that the performance of the lens is unchanged by the limitation of the size.

Specifically, the tight connection between the LED light source 5 and the lens body 1 at helps to improve the light extraction rate of the LED light source, the LED light source 5 is selected to be placed inside the origin of the lens body 2, the farther the LED light source is from the lens, the less the light flux of the light source collected by the lens body 1, and therefore the lower the efficiency of the entire lens body, according to the calculation formula of the convex lens, r is (n-1) f, where r is the radius of curvature of the convex surface, n is the refractive index of the lens material, and f is the focal length of the lens, and in the case of the selected lens material, the refractive index is a fixed value, the larger the focal length, the larger the radius of curvature is, and the larger the radius of curvature is under the same lens aperture phi, the thinner the lens is, and the thicker the lens is, the aberration becomes more obvious, thereby affecting the use effect, therefore, the lens with the larger focal length may be selected as far as possible, the focal length is increased, the size of the optical system is increased, so that the lens may be adjusted to a size smaller when the illumination effect of the lens is satisfied, and the size of the lens body is adjusted to a height of the inner surface is not smaller, and the inner surface size is adjusted according to the specific inner surface size of the inner surface, and the inner surface size of the inner surface is adjusted to be adjusted.

In this embodiment, the preferred outer edge 2 is integrally formed with the lens body 1 .

In this embodiment, the lens is a glass lens, and may be made of a high borosilicate 3.3 material; of course, in other embodiments, the material of the lens may also be adjusted according to specific needs, and is not limited herein.

In this embodiment, the outer edge 2 is preferably rounded, which is designed to facilitate lens mounting and uniformity and stability of forces around the lens. Of course, in other embodiments, the outer edge may be designed as a regular polygon, etc., and is not limited herein.

In this embodiment, the positioning fool-proof structure 3 is disposed on the upper surface of the outer edge 2, and the positioning fool-proof structure 3 is opposite to the lens body 1 at the middle position in the direction of C90 ° -270 °, as shown in fig. 1.

Because lens body 1 has the decentrality in this embodiment, when being equipped with a plurality of LED modules on a plurality of lamps and lanterns, need guarantee nature that each lens installation direction was LED to, this embodiment is through the design of location fool-proof structure 3, guarantees nature that a plurality of lenses installed.

Specifically, when the LED module is assembled with the lens, the assembly is completed by means of a lens assembly fixture, and the steps are described by combining the step shown in FIG. 5, wherein an anti-dazzle ring 02 (the anti-dazzle ring 02 is an structure arranged on the LED module and arranged on the outer side ring of the lens) is firstly placed in the fixture, the anti-dazzle ring 02 is positioned with a notch of the fixture, then the lens 01 is placed on the fixture, a positioning fool-proof structure 3 of the lens 01 is matched with a positioning groove of the fixture, so that the only performance of the assembly direction of the lens, the fixture and the anti-dazzle ring is ensured, and finally other components of the module are assembled, and the performance of the lens.

, the upper surface of the outer edge 2 is further provided with arrow indicating structures 4, and the arrow indicating structures 4 and the positioning fool-proof structures 3 are located at two opposite sides of the lens body 1.

After the LED module is assembled and when the whole module is assembled with the lamp body, the arrow also has obvious directivity; meanwhile, when the street lamp is constructed, workers can also check whether the LED module is assembled or not through the arrow direction, and follow-up maintenance caused by assembling and disassembling of the LED module is avoided.

It will be appreciated by those skilled in the art that the invention can be embodied in many other specific forms without departing from the spirit or scope of the invention. Although embodiments of the present invention have been described, it is to be understood that the invention is not limited to those embodiments, and that changes and modifications may be made by one skilled in the art within the spirit and scope of the invention as defined in the appended claims.

Claims

The LED module lens is characterized by comprising a lens body and an outer edge arranged on a circle at the lower end of the lens body in a surrounding mode, wherein the bottom of the lens body is inwards concave to form an inner curved surface part, the top of the lens body is outwards convex to form an outer curved surface part, and an LED light source is arranged right below the inner curved surface part;

the inner curved surface part and the outer curved surface part are symmetrical in the direction of C0-180 degrees;

the inner curved surface part and the outer curved surface part are asymmetric in the C90-270 degree direction, the included angle between the normal of the far light-gathering surface of the outer curved surface part in the C90-270 degree direction and the optical axis of the lens body is larger than or equal to 15.26 degrees, and the light distribution angle of the lens body in the C90-270 degree direction is larger than or equal to 72.02 degrees.
2. The LED module lens of claim 1, wherein said inner curved surface portion is eccentric in a direction of C90 ° -270 ° opposite to said outer curved surface portion.
3. The LED module lens of claim 1, wherein said inner curved surface portion has a height of 7.9 mm.
4. The LED module lens of claim 1 or 3, wherein said outer edge is integrally formed with said lens body .
5. The LED module lens of claim 1, wherein said outer edge is circular.
6. The LED module lens of claim 1, wherein said outer upper surface has a positioning fool-proof structure disposed thereon, said positioning fool-proof structure being opposite to said lens body at a middle position in a direction of C90 ° -270 °.
7. The LED module lens of claim 6, wherein said outer upper surface is further provided with arrow indicating structures, said arrow indicating structures and said positioning fool-proof structures being located at two opposite sides of said lens body.