CN203413542U

CN203413542U - Zoom lens group for LED lamp

Info

Publication number: CN203413542U
Application number: CN201320523688.2U
Authority: CN
Inventors: 邓岚; 曾垂通
Original assignee: Shanghai Yaming Lighting Co Ltd
Current assignee: Shanghai Yaming Lighting Co Ltd
Priority date: 2013-08-26
Filing date: 2013-08-26
Publication date: 2014-01-29
Anticipated expiration: 2023-08-26

Abstract

The utility model provides a zoom lens group for an LED lamp. The zoom lens group comprises a collimation type lens, and an LED light source arranged at the incident face of the collimation type lens. A first lens and a second lens which are both movable are sequentially arranged above the light emitting face of the collimation type lens, a moving space is arranged between the first lens and the collimation type lens, a moving space is also arranged above the second lens, and after the first lens and the second lens are combined, the refracting surface of the first lens and the refracting surface of the second lens are attached. According to the zoom lens group, after the first lens and the second lens are combined, the two lenses form a light transmitting flat plate, approximate parallel light in front of the flat plate can not be changed, meanwhile, the relative position of the first lens and the second lens is changed through moving of the first lens and the second lens, so that the focus of the lens group is changed, the purpose of changing focuses is achieved, and the LED lamp can meet different application requirements of indoor lighting.

Description

Variable focus lens package for LED light fixture

Technical field

The utility model relates to a kind of LED lighting, particularly relates to a kind of variable focus lens package for LED light fixture.

Background technology

At present, the mode that realizes LED light fixture zoom has multiple, is relatively typically overall lens and the reflective mode that adds convex lens of adopting.Wherein, the Zoom structure of overall lens as shown in Figure 1, comprises collimation-type lens 1, and the incidence surface of collimation-type lens is provided with LED light source 2, is embedded with Fresnel Lenses 6 on the exiting surface of collimation-type lens; When realizing zoom, need integrated moving this collimation-type lens or LED light source, scope when mobile is very limited, and some position is very responsive, bad control.The reflective Zoom structure that adds convex lens as shown in Figure 2, comprises reflector 7, and the bottom of reflector 7 is provided with LED light source 2, and the upper end of reflector 7 is provided with convex lens 8; In this structure, because convex lens are more thick and heavy, and when zoom, also need convex lens to move certain distance, thus be unfavorable for the miniaturization of LED light fixture, and the aberration after convex lens is difficult to control.In addition, above-mentioned two kinds of Zoom structures all can not guarantee to adjust when only having collimation-type lens or reflector the state of light, i.e. the adjustment of light must be leaned on the acting in conjunction of whole optical elements, therefore be difficult to realize approximate directional light; And under the effect of Fresnel Lenses or convex lens, the initial formed approximate directional light of LED light fixture is bound to be changed, and its zooming range is also little, can not meet the demand of the different occasions of room lighting.

Utility model content

The shortcoming of prior art in view of the above, the technical problems to be solved in the utility model is to provide a kind of large variable focus lens package for LED light fixture of zooming range can not change the initial formed approximate directional light of LED light fixture and zoom time.

For achieving the above object, the utility model provides a kind of variable focus lens package for LED light fixture, comprise collimation-type lens, be located at the LED light source at collimation-type lens incidence surface place, the top of described collimation-type lens exiting surface is provided with all movably first lens and the second lens successively, and between described first lens and collimation-type lens and the top of the second lens is equipped with a mobile space; After described first lens and the second lens close, the plane of refraction of the plane of refraction of first lens and the second lens fits.

Preferably, described first lens and the second lens are a lens ring, and the plane of refraction of described first lens is provided with the annular groove of a plurality of concentric settings, the plane of refraction of described the second lens is provided with the annulus projection of a plurality of concentric settings, and described annular groove and annulus projection are suitable.

Preferably, described first lens and the second lens are a lens ring, and the plane of refraction of described first lens is provided with the annulus projection of a plurality of concentric settings, and the plane of refraction of described the second lens is provided with the annular groove of a plurality of concentric settings, and described annular groove and annulus projection are suitable.

Further, described first lens and the second lens are a Fresnel Lenses.

Further, the diameter D of described first lens and the second lens is all greater than the diameter L of collimation-type lens exiting surface.

Preferably, the material of described collimation-type lens, first lens and the second lens is PC or PMMA.

Further, described collimation-type lens bottom is provided with a pit, and pit upper end is provided with a projection, and described LED light source is positioned at this pit, and the hole wall of this pit and the arc-shaped surface of projection form described collimation-type lens incidence surface.

As mentioned above, the variable focus lens package for LED light fixture that the utility model relates to, has following beneficial effect:

In this variable focus lens package, by first lens and the second lens altogether after, two lens are the flat board of a printing opacity, that by collimation-type lens, integrates is approximately parallel rays after the flat board of this printing opacity, it can not change, and light fixture can access approximately parallel light; Simultaneously, by mobile first lens and the second lens, change both relative positions, to change the focal length of set of lenses, the parallel rays that is approximately of integrating by collimation-type lens is converged to different focuses, reach the object of zoom, finally make LED light fixture meet the different application requirement of room lighting.

Accompanying drawing explanation

Fig. 1, Fig. 2 are the structural representation of variable focus lens package in prior art.

Fig. 3, Fig. 4 are structural representation of the present utility model.

Fig. 5 is that the A-A of Fig. 4 is to view.

Fig. 6 is that the B-B of Fig. 4 is to view.

Element numbers explanation

1 collimation-type lens

11 incidence surfaces

12 exiting surfaces

13 pits

14 projections

2 LED light sources

3 first lens

The plane of refraction of 31 first lens

4 second lens

The plane of refraction of 41 second lens

5 mobile spaces

6 Fresnel Lenses

7 reflectors

8 convex lens

9 cannelures

10 annular protrusions

The specific embodiment

By particular specific embodiment, embodiment of the present utility model is described below, person skilled in the art scholar can understand other advantages of the present utility model and effect easily by the disclosed content of this description.

Notice, appended graphic the illustrated structure of this description, ratio, size etc., equal contents in order to coordinate description to disclose only, for person skilled in the art scholar, understand and read, not in order to limit the enforceable qualifications of the utility model, therefore the technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under the effect that the utility model can produce and the object that can reach, all should still drop on the technology contents that the utility model discloses and obtain in the scope that can contain.Simultaneously, in this description, quote as " on ", the term of D score, " left side ", " right side ", " centre " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under without essence change technology contents, when being also considered as the enforceable category of the utility model.

As shown in Figure 3 and Figure 4, the utility model provides a kind of variable focus lens package for LED light fixture, comprise collimation-type lens 1, be located at the LED light source 2 at collimation-type lens incidence surface 11 places, the top of described collimation-type lens exiting surface 12 is provided with all movably first lens 3 and the second lens 4 successively, between described first lens 3 and collimation-type the lens 1 and top of the second lens 4 is equipped with a mobile space 5, to allow that first lens 3 and the second lens 4 move up and down; After described first lens 3 and the second lens 4 close, the plane of refraction 31 of first lens and the plane of refraction 41 of the second lens fit.

Further, see Fig. 3, described collimation-type lens 1 bottom is provided with a pit 13, and pit 13 upper ends are provided with a projection 14, described LED light source 2 is positioned at this pit 13, and the hole wall of this pit 13 and the arc-shaped surface of projection 14 form described collimation-type lens incidence surface 11.In addition, described collimation-type lens 1 are a rotationally symmetric body, by the acting in conjunction of the pit 13 hole N-Side surfs of wall and the front curve on projection 14 surfaces, after the light refraction or total reflection that can the in the situation that of collimation-type lens 1 small volume, LED light source 2 be sent, be adjusted to the light of approximate directional light or smaller angle, thereby be conducive to the miniaturization of LED light fixture.

In the present embodiment, described first lens 3 and the second lens 4 are a lens ring or are a Fresnel Lenses, be all a thinner disk, be beneficial to lightness and the miniaturization of light fixture, both form a set of lenses movably, the lower surface of described first lens 3 is a light face, and upper surface is its plane of refraction 31; The lower surface of described the second lens 4 is its plane of refraction 41, upper surface is a light face, so when by first lens 3 and the second lens 4 altogether after, as shown in Figure 3, the seamless laminating of plane of refraction 41 of the plane of refraction 31 of first lens and the second lens, now, two lens are the flat board of a printing opacity, can not change approximate directional light above, that by collimation-type lens 1, integrates is approximately parallel rays after the flat board of this printing opacity, it can not change, and light fixture can access approximately parallel light.During zoom, first lens 3 and the second lens 4 are separated, and by mobile first lens 3 Huo ∕ and the second lens 4, change both relative positions, change the distance between first lens 3 and the second lens 4, see Fig. 4, thereby change the focal length of set of lenses, the parallel rays that is approximately of integrating by collimation-type lens 1 is converged to different focuses, spot size on receiving plane also can change thereupon, reaches the object of zoom, finally makes LED light fixture meet the different application requirement of room lighting.

Preferably, when first lens 3 and the second lens 4 are lens ring, the plane of refraction 31 of described first lens is provided with the annular groove 9 of a plurality of concentric settings, and the plane of refraction 41 of described the second lens is provided with the annulus projection 10 of a plurality of concentric settings, and described annular groove 9 is suitable with annulus projection 10.Now, first lens 3 is a concave surface lens ring, and the second lens 4 are a convex surface lens ring, and after first lens 3 and the second lens 4 agree with mutually, described circular arc projection 10 is arranged in annular groove 9.Or the plane of refraction 31 of described first lens is provided with the annulus projection 10 of a plurality of concentric settings, sees Fig. 6, the plane of refraction 41 of described the second lens is provided with the annular groove 9 of a plurality of concentric settings, sees Fig. 5, and described annular groove 9 is suitable with annulus projection 10.Now, first lens 3 is a convex surface lens ring, and the second lens 4 are a concave surface lens ring, and after first lens 3 and the second lens 4 agree with mutually, described circular arc projection 10 is arranged in annular groove 9.

Further, see Fig. 3, the diameter D of described first lens 3 and the second lens 4 is all greater than the diameter L of collimation-type lens 1 exiting surface 12.

Preferably, the material of described collimation-type lens 1, first lens 3 and the second lens 4 is PC or PMMA, adopts the mode of injection mo(u)lding to make, and effectively alleviates the overall weight of light fixture, is conducive to the lightness of light fixture.

In sum, the utility model has effectively overcome various shortcoming of the prior art and tool high industrial utilization.

Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all can, under spirit of the present utility model and category, modify or change above-described embodiment.Therefore, have in technical field under such as and conventionally know that the knowledgeable modifies or changes not departing from all equivalences that complete under spirit that the utility model discloses and technological thought, must be contained by claim of the present utility model.

Claims

1. the variable focus lens package for LED light fixture, comprise collimation-type lens (1), be located at the LED light source (2) that collimation-type lens incidence surface (11) is located, it is characterized in that: the top of described collimation-type lens exiting surface (12) is provided with all movably first lens (3) and the second lens (4) successively, between described first lens (3) and collimation-type lens (1) and the top of the second lens (4) is equipped with a mobile space (5); After described first lens (3) and the second lens (4) close, the plane of refraction (41) of the plane of refraction of first lens (31) and the second lens fits.

2. the variable focus lens package for LED light fixture according to claim 1, it is characterized in that: described first lens (3) and the second lens (4) are a lens ring, and the plane of refraction of described first lens (31) is provided with the annular groove (9) of a plurality of concentric settings, the plane of refraction of described the second lens (41) is provided with the annulus projection (10) of a plurality of concentric settings, and described annular groove (9) is suitable with annulus projection (10).

3. the variable focus lens package for LED light fixture according to claim 1, it is characterized in that: described first lens (3) and the second lens (4) are a lens ring, and the plane of refraction of described first lens (31) is provided with the annulus projection (10) of a plurality of concentric settings, the plane of refraction of described the second lens (41) is provided with the annular groove (9) of a plurality of concentric settings, and described annular groove (9) is suitable with annulus projection (10).

4. the variable focus lens package for LED light fixture according to claim 1, is characterized in that: described first lens (3) and the second lens (4) are a Fresnel Lenses.

5. according to the variable focus lens package for LED light fixture described in claim 2-4 any one, it is characterized in that: the diameter D of described first lens (3) and the second lens (4) is all greater than the diameter L of collimation-type lens (1) exiting surfaces (12).

6. the variable focus lens package for LED light fixture according to claim 1, is characterized in that: the material of described collimation-type lens (1), first lens (3) and the second lens (4) is PC or PMMA.

7. the variable focus lens package for LED light fixture according to claim 1, it is characterized in that: described collimation-type lens (1) bottom is provided with a pit (13), and pit (13) upper end is provided with a projection (14), described LED light source (2) is positioned at this pit (13), and the arc-shaped surface of the hole wall of this pit (13) and projection (14) forms described collimation-type lens (1) incidence surfaces (11).