Lens

Abstract

The utility model relates to the technical field of lighting equipment, in particular to a lens. Comprising a lens body, the lens body comprises a mounting surface and a light emitting surface which are oppositely arranged, a light inlet cavity formed by the mounting surface is formed in the lens body, a light inlet surface is formed on the inner wall of the light inlet cavity, the light emitting surface comprises a plurality of arc petal structures, and the arc petal structures are arranged around a center shaft in an annular array mode. The width of each arc petal structure is reduced from outside to inside in the direction from the outer side to the center shaft, all the arc petal structures converge at one point to the center shaft, and the convergent point is in a concave state. Light enters the lens body to be refracted through the wall face of the light inlet cavity, and then the light is secondarily refracted to the lens body through the arc lobe structures. The light emitted by the patch lens has better uniformity and better light emitting angle, and the patch lens can adapt to the use requirements of lamps in different scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to lighting equipment technical field, especially a lens. BACKGROUND

[0002] LED lamp gradually becomes the mainstream choice of lighting tool because of its advantages of high brightness, energy saving and lightness. LED lighting lamps and lanterns include ceiling lamp and direct down lamp. The existing ceiling lamp and direct down lamp need LED patch lamp bead and single lens cooperation to realize the divergent distribution of light beam. With the improvement of people's pursuit of high-quality life demand, new requirements are put forward for lamp design shape, light uniformity, light shape structure and the like. The existing ordinary lens is insufficient, therefore, a new lens structure needs to be designed as the basis to meet the use demand of lamps and lanterns in different scenes. SUMMARY

[0003] In order to overcome the defects in the prior art, the utility model provides a lens with a new structure.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a lens, comprising a lens body, the lens body includes oppositely arranged mounting surface and light emitting surface, the lens body is provided with a light inlet cavity formed by the mounting surface, the inner wall of the light inlet cavity forms a light inlet surface, the light emitting surface includes a plurality of arc petal structures, each arc petal structure is arranged in an annular array around a center axis, the arc petal structure is arranged in a structure with a width decreasing from the outside to the center axis direction, each arc petal structure converges at a point at the center axis, and the convergence point is in a concave state.

[0005] Further, the bottom edge of the outermost arc petal structure is an edge arc line, the length of the arc line chord of the edge arc line is W, the distance from the arc line vertex of the edge arc line to the arc line chord is d, and the size of W and d satisfies 0.1W≤d≤0.4W.

[0006] Further, an outer side wall is formed between the mounting surface and the light emitting surface, and the outer side wall is formed by vertically extending the edge arc line towards the mounting surface.

[0007] Further, the outer side wall and the mounting surface are provided with a grain.

[0008] Further, a concave intersection groove structure is formed at the intersection between the two adjacent arc petal structures.

[0009] Further, the number of the arc petal structures is N, N is a natural number, and N≥6.

[0010] Further, the mounting surface is provided with a recessed step surface, the step surface is provided with a recessed lamp bead placement site, and the light inlet cavity is formed by opening the lamp bead placement site towards the light emitting surface.

[0011] Further, the light inlet cavity forms a taper structure from the mounting surface to the light outlet surface, the light inlet surface comprises a plurality of light inlet portions combined from top to bottom, each light inlet portion is formed by an array of curved surfaces around a central axis, the number of curved surfaces in each light inlet portion is consistent, the number of curved surfaces in each light inlet portion array is M, M is a natural number, and M is greater than or equal to 6.

[0012] Further, the lens body material is one of polycarbonate and acrylic.

[0013] Further, the light distribution curve generated by the lens body is asymmetric, the light beam peak angle of the C0° / 180° cross section is 156°±5°, the light distribution curve is narrow and elongated, the light beam peak angle of the C90° / 270° cross section is 136°±5°, the light distribution curve is narrow and short, and the energy is mainly concentrated in the middle.

[0014] From the above description of the utility model, compared with the prior art, the utility model provides a lens, through the targeted structure improvement design of the lens body, light enters the lens body through the wall surface of the light inlet cavity, and then is refracted twice by the arc petal structure to the lens body. The light emitted by the patch lens has better uniformity and better light emission angle, and can meet the use requirements of the lamp in different scenes. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Fig. 1 is a schematic diagram of the structure angle of the lens of the utility model.

[0016] Figure 2 Fig. 2 is a schematic diagram of the structure angle of the lens of the utility model.

[0017] Figure 3 Fig. 3 is a schematic diagram of the cross-sectional structure angle of the lens of the utility model.

[0018] Figure 4 Fig. 4 is a schematic diagram of the cross-sectional structure angle of the lens of the utility model.

[0019] Figure 5 Fig. 5 is a schematic diagram of the cross-sectional structure angle of the lens of the utility model.

[0020] Figure 6 Fig. 6 is a light distribution curve diagram of the utility model in the polar coordinate system.

[0021] Figure 7 Fig. 7 is a light distribution curve diagram of the utility model in the rectangular coordinate system.

[0022] The corresponding identification in the figure is as follows: 1, mounting surface; 11, stepped surface; 12, lamp bead placement site; 2, light emitting surface; 21, arc petal structure; 22, central axis; 23, concave intersection groove; 24, edge arc line; 3, outer side wall; 4, light inlet cavity; 41, light inlet part. DETAILED DESCRIPTION

[0023] The utility model will be further described below through the specific implementation.

[0024] Referring to Figures 1 to 5 As shown in the figure, a lens comprises a lens body, and the material of the lens body is one of polycarbonate and acrylic.

[0025] The lens body comprises a mounting surface 1 and a light emitting surface 2 arranged oppositely, and an outer side wall 3 is further formed between the mounting surface 1 and the light emitting surface 2. The lens body is provided with a light inlet cavity 4 formed by the mounting surface 1. The inner wall of the light inlet cavity 4 forms a light inlet surface. The light emitting surface 2 comprises a plurality of arc petal structures 21. Each arc petal structure 21 is arranged in an annular array around a central axis 22. The arc petal structure 21 is of a structure in which the width decreases from the outside to the central axis 22. Each arc petal structure 21 converges at a point at the central axis 22, and the converging point is in a concave state. A concave intersection groove 23 structure is formed at the intersection between adjacent two arc petal structures 21. The number of the arc petal structures 21 is N, N is a natural number, and N≥6. In the embodiment, N is preferably 10. The bottom edge of the arc petal structure 21 at the outermost side is an edge arc line 24. The chord length of the edge arc line 24 is W, and the distance from the vertex of the edge arc line 24 to the chord length is d. The sizes of W and d satisfy 0.1W≤d≤0.4W.

[0026] The outer side wall 3 is vertically extended from each edge arc line 24 towards the mounting surface 1. The mounting surface 1 is provided with a concave stepped surface 11, and the stepped surface 11 is provided with a concave lamp bead placement site 12. The light inlet cavity 4 is further formed by the lamp bead placement site 12 towards the light emitting surface. The stepped surface 11 is used for cooperating with dispensing. The lens is fixed on a light source plate through dispensing. The outer side wall 3 and the stepped surface 11 of the mounting surface 1 are provided with scribes. The purpose of the scribes is to reduce stray light and chromatic dispersion.

[0027] The light inlet cavity 4 forms a taper structure from the mounting surface 1 to the light emitting surface 2. The light inlet surface comprises a plurality of light inlet parts 41 combined in layers from the mounting surface 1 to the light emitting surface 2. Each layer of the light inlet parts 41 is formed by a curved surface around the central axis. The number of the curved surfaces contained in each layer of the light inlet parts 41 is consistent. The number of the curved surfaces in each layer of the light inlet parts 41 is M, M is a natural number, and M≥6. In the embodiment, M is preferably 8.

[0028] The lens body generates a non-symmetrical light distribution curve, the beam peak angle of C0° / 180° section is 156°±5°, the light distribution curve is narrow and long, the beam peak angle of C90° / 270° section is 136°±5°, the light distribution curve is narrow and short, and the energy is mainly concentrated in the middle.

[0029] Figure 6 、 Figure 7 The application is a test experimental data graph, the optical lens is installed on the 2835 or 3030 patch lamp bead, and the light distribution curve generated by the light emission of the lamp bead. Figure 6 The light distribution curve of the polar coordinate system. Figure 7 The light distribution curve of the rectangular coordinate system, which shows the divergent spatial light intensity distribution. As shown in the figure, the generated light distribution curve is non-symmetrical, the beam peak angle of C0° / 180° section is ±78°, the beam peak angle is about 156°, the light distribution curve is narrow and long, the beam peak angle of C90° / 270° section is ±68°, the beam peak angle is about 136°, the light distribution curve is narrow and short, and the energy is mainly concentrated in the middle.

[0030] The above is only one specific embodiment of the application, but the design concept of the application is not limited thereto, and any non-substantial change of the application by using the concept should belong to the behavior of infringing the protection range of the application.

Claims

1. A lens characterized by: The lens body comprises oppositely arranged mounting surface and light emitting surface, and the lens body is provided with a light inlet cavity formed by the mounting surface, and the inner wall of the light inlet cavity forms a light inlet surface; the light emitting surface comprises a plurality of arc petal structures, each arc petal structure is arranged in an annular array around a central axis, the arc petal structure is of a structure in which the width decreases from outside to inside in the direction of the central axis, each arc petal structure converges at a point at the central axis, and the convergence point is in a recessed state.

2. A lens according to claim 1, characterised in that: An edge arc line is formed at the bottom edge of the outermost arc petal structure, the arc line chord length of the edge arc line is W, the distance from the arc line vertex of the edge arc line to the arc line chord length is d, and the size of W and d satisfies 0.1W≤d≤0.4W.

3. A lens according to claim 2, wherein: An outer side wall is further formed between the mounting surface and the light emitting surface, and the outer side wall is formed by vertically extending each edge arc line in the direction of the mounting surface.

4. A lens according to claim 3, wherein: The outer side wall and the mounting surface are provided with a sunken line.

5. The lens of claim 1, wherein: A concave intersection groove structure is formed at the intersection between adjacent two arc petal structures.

6. The lens of claim 1, wherein: The number of the arc petal structures is N, N is a natural number, and N≥6.

7. The lens of claim 1, wherein: The mounting surface is provided with a recessed step surface, the step surface is provided with a recessed lamp bead placement site, and the light inlet cavity is formed by opening the lamp bead placement site in the direction of the light emitting surface.

8. The lens of claim 1, wherein: The light inlet cavity is of a taper structure in which the size decreases from the mounting surface to the light emitting surface, the light inlet surface comprises a plurality of light inlet parts combined in layers from the mounting surface to the light emitting surface, each layer of light inlet part is formed by an array of curved surfaces around the central axis, the number of the curved surfaces included in each layer of light inlet part is consistent, the number of the curved surfaces in the array of each layer of light inlet part is M, M is a natural number, and M≥6.

9. The lens of claim 1, wherein: The material of the lens body is one of polycarbonate and acrylic.

10. The lens of claim 1, wherein: The light distribution curve generated by the lens body is asymmetric, the beam peak angle of the C0° / 180° cross section is 156°±5°, the light distribution curve is relatively narrow and elongated; the beam peak angle of the C90° / 270° cross section is 136°±5°, the light distribution curve is relatively narrow and short, and the energy is mainly concentrated in the middle.

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