Lens module and lighting fixture

Abstract

To provide a lens module and a lighting fixture which prevent a dark area from being formed in the center of the lighting fixture. The lens module includes a lens cover 1 having an annular structure and a first annular lens 2 molded on the underside of the lens cover and protruding downward, the first annular lens has a first accommodation space for accommodating a light-emitting unit, the inner wall of the first accommodation space forms a first light incident surface, the outer surface of the first annular lens forms a first light exit surface, the first light incident surface includes a first inner light incident surface and a first outer light incident surface, the first inner light incident surface faces the center of the lens cover, the first outer light incident surface faces the outer edge of the lens cover, and based on the optical axis of the light-emitting unit, the first light incident intersection of the first inner light incident surface and the first outer light incident surface is offset from the optical axis, and the first light incident intersection is located between the optical axis and the first outer light incident surface. Since the light-emitting unit is biased toward the first inner light incident surface, the amount of light received by the first inner light incident surface is large.

Description

[Technical field]

[0001] The present invention relates to the technical field of lighting fixtures, and more particularly to a lens module and a lighting fixture. [Background technology]

[0002] Ceiling lights are an important product for home lighting. At present, conventional ceiling lights generally include a base, a light source board installed on the base, a lens module installed on the light source board, and a lampshade installed to cover the lens module. Among them, the lens module is the core part of the ceiling light, and its role is to distribute the light emitted by the LED light source of the LED bulb.

[0003] In the prior art, there are generally two types of light distribution using a lens module. One type employs only a number of single lenses arranged in a circle. When such a lens module is applied to a lampshade, the color of the light on the surface of the lampshade is uniform, but when it is applied to a relatively tall lampshade, the illuminance on the surface of the lampshade is low. The other type employs a ring-shaped tubular lens. When such a lens module is applied to a lampshade, the illuminance on the surface of the lampshade is high, but the color of the light on the surface of the lampshade is not uniform. In particular, when the lens module and the light source board have a ring structure, the center of the lens module is hollow, and an LED bulb cannot be installed, so the light output from the hollow area in the center of the lens module is low, and a dark area is formed in the center of the lampshade. Summary of the Invention [Problem to be solved by the invention]

[0004] The objective of the present invention is to provide a lens module and a lighting fixture to solve the technical problems existing in the prior art, that is, when light is distributed using a tubular lens, a dark area is created in the center of the lighting fixture, resulting in non-uniform light emission. [Means for solving the problem]

[0005] In order to achieve the above object, in a first aspect, an embodiment of the present invention includes a lens cover having an annular structure; and a first annular lens molded on a lower surface of the lens cover and protruding downward; The first annular lens has a first accommodating space for accommodating a light emitting unit, an inner wall of the first accommodating space forms a first light incident surface, and an outer surface of the first annular lens forms a first light exit surface; The first light incident surface includes a first inner light incident surface and a first outer light incident surface, the first inner light incident surface faces a central portion of the lens cover and the first outer light incident surface faces an outer edge portion of the lens cover, and with respect to an optical axis of the light emitting unit, a first light incident intersection point of the first inner light incident surface and the first outer light incident surface is offset from the optical axis, and the first light incident intersection point is located between the optical axis and the first outer light incident surface.

[0006] According to the first aspect, in one possible embodiment, when the optical axis is used as a reference, the distance from the optical axis to the inner edge of the first light exit surface is greater than the distance from the optical axis to the outer edge of the first light exit surface.

[0007] In some embodiments, the lens module further includes a second annular lens molded on a lower surface of the lens cover and protruding downward, the second annular lens being located radially outward of the first annular lens; The second annular lens has a second accommodating space for accommodating the light emitting unit, and an inner wall of the second accommodating space forms a second light incident surface, and the second light incident surface is symmetrically arranged with respect to the optical axis; An outer surface of the second annular lens forms a second light exit surface, and the second light exit surface is disposed symmetrically with respect to the optical axis.

[0008] In some embodiments, the lens module further includes a second annular lens molded on a lower surface of the lens cover and protruding downward, the second annular lens being located radially outward of the first annular lens; The second annular lens has a second accommodating space for accommodating the light emitting unit, an inner wall of the second accommodating space forms a second light incident surface, and an outer surface of the second annular lens forms a second light exit surface; The second light incident surface includes a second inner light incident surface and a second outer light incident surface, the second inner light incident surface faces a central portion of the lens cover and the second outer light incident surface faces an outer edge portion of the lens cover, with the exception that, based on the optical axis, a second light incident intersection of the second inner light incident surface and the second outer light incident surface is offset from the optical axis, and the second light incident intersection is located between the optical axis and the second outer light incident surface.

[0009] In some embodiments, relative to the optical axis, a distance from the optical axis to an inner edge of the second light exit surface is greater than a distance from the optical axis to an outer edge of the second light exit surface.

[0010] In some embodiments, a plurality of compensation lenses are further molded on a lower surface of the lens cover, the plurality of compensation lenses being located between the first annular lens and the second annular lens.

[0011] In some embodiments, the first annular lens includes a first sub-lens having multiple stages spaced apart along a circumferential direction, and the second annular lens includes a second sub-lens having multiple stages spaced apart along a circumferential direction; The second sub-lens and the first sub-lens have a one-to-one correspondence in the radial direction, and the compensation lens is provided between an end of the second sub-lens and an end of the first sub-lens.

[0012] The beneficial effects of the lens module provided by the present invention are as follows: Compared with the prior art, the lens module of the present invention has a first annular lens molded on the lens cover, and the first annular lens surrounds the lens cover, so that the first annular lens has a first inner light incident surface facing the center of the lens cover and a first outer light incident surface facing the outer edge of the lens cover, and the first light incident intersection of the first inner light incident surface and the first outer light incident surface is offset from the optical axis of the light-emitting unit, and the first light incident intersection is located between the optical axis and the first outer light incident surface, that is, the light-emitting unit is biased toward the first inner light incident surface, so that the light receiving amount of the first inner light incident surface is large, and more light can be output to the center of the lens cover through the first inner light incident surface and the first light output surface, thereby avoiding the dark area in the center of the luminaire and ensuring the uniformity of the light output of the entire luminaire.

[0013] In a second aspect, an embodiment of the present invention also includes: A base plate; a light source substrate having an annular structure and fixed on the base plate, the light source substrate having a plurality of light emitting units; and the lens module provided to cover an underside of the light source substrate.

[0014] According to the second aspect, in one possible embodiment, a plurality of lock hooks are provided on an inner peripheral edge and an outer peripheral edge of the lens cover, respectively, and the lock hooks abut against an upper surface of the light source substrate.

[0015] According to the second aspect, in one possible embodiment, a downwardly protruding annular boss is provided on the base plate, and the light source substrate and the lens cover are fixed on the annular boss; The lighting fixture further includes a drive box fixedly mounted on the base plate and positioned in the annular inner space of the annular boss.

[0016] The lighting fixture provided by the present invention adopts the above-mentioned lens module, which can avoid dark areas in the center and transition parts of the lighting fixture, achieve a larger light output angle, and ensure the uniformity of light emission throughout the lighting fixture. [Brief description of the drawings]

[0017] In the following, in order to more clearly explain the technical solutions of the embodiments of the present invention, drawings that need to be used in the description of the embodiments or prior art will be briefly introduced. It is obvious to those skilled in the art that the drawings in the following description are only some embodiments of the present invention, and other drawings can also be obtained based on these drawings without inventive work.

[0018] [Figure 1] 2 is a structural schematic diagram of a lens module provided in accordance with an embodiment of the present invention; FIG. [Diagram 2] 2 is a schematic cross-sectional view of a first annular lens of a lens module provided in accordance with an embodiment of the present invention; [Diagram 3] 2 is a schematic cross-sectional view of a second annular lens of a lens module provided in accordance with an embodiment of the present invention; [Figure 4] FIG. 2 is a structural schematic diagram of a lighting fixture provided in accordance with the first embodiment of the present invention; [Diagram 5] 1 is an exploded structural diagram of a lighting fixture provided in accordance with a first embodiment of the present invention; FIG. [Figure 6] 2 is a structural schematic diagram of a lighting fixture provided in accordance with a second embodiment of the present invention; FIG. [Figure 7] FIG. 2 is a structural schematic diagram of a lighting device provided in accordance with a third embodiment of the present invention. [Figure 8] FIG. 11 is a structural schematic diagram of a lighting device provided in accordance with the fourth embodiment of the present invention. [Figure 9] 2 is a schematic diagram of a light output of a first annular lens provided in an embodiment of the present invention; [Figure 10] 4 is a schematic diagram of the light output of a second annular lens provided in an embodiment of the present invention; [Explanation of symbols]

[0019] 1 Lens cover 11 Lock Hook 2 First annular lens 21 First Storage Space 22 First light incident surface 221 First inner light incidence surface 222 First outer light incident surface 23 First light exit surface 24 1st sub-lens 3 Second annular lens 31 Second Storage Space 32 Second light incident surface 321 Second inner light incidence surface 322 Second outer light incident surface 33 Second light exit surface 34 Second sub-lens 4 Compensatory Lenses 5 Base plate 51 Circular boss 6 Light source board 61 Light Emitting Unit 611 Optical axis 7 Drive box DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] In the following, the present invention will be described in more detail with reference to the drawings and embodiments, so as to make the technical problems, technical solutions and beneficial effects of the present invention clearer. It should be understood that the specific embodiments described herein are merely for interpreting the present invention, and are not intended to limit the present invention.

[0021] The lens module provided by the present invention will be described below with reference to Figures 1 and 2. The lens module includes a lens cover 1 having an annular structure and a first annular lens 2 molded on the lower surface of the lens cover 1 and protruding downward.

[0022] The first annular lens 2 has a first accommodating space 21 that accommodates the light-emitting unit 61, the inner wall of the first accommodating space 21 forms a first light incident surface 22, and the outer surface of the first annular lens 2 forms a first light exit surface 23. The light emitted from the light-emitting unit 61 exits through the first light incident surface 22 and then through the first light exit surface 23.

[0023] The first light incident surface 22 includes a first inner light incident surface 221 and a first outer light incident surface 222, the first inner light incident surface 221 faces the center of the lens cover 1 and the first outer light incident surface 222 faces the outer edge of the lens cover 1, however, when the optical axis 611 of the light-emitting unit 61 is taken as a reference, a first light incident intersection O1 of the first inner light incident surface 221 and the first outer light incident surface 222 is offset from the optical axis 611, and the first light incident intersection is located between the optical axis 611 and the first outer light incident surface 222, however, the optical axis 611 is the axis of symmetry of the light-emitting unit 61.

[0024] The lens cover 1 has an annular structure and may be a circular ring, an elliptical ring, a rectangular ring, or a polygonal ring. In this embodiment, the specific structure of the lens cover 1 is not limited as long as the center is hollow and the first annular lens 2 is disposed surrounding the lens cover 1.

[0025] The first annular lens 2 is molded on the lower surface of the lens cover 1, and the term "below" here is defined by the light emission direction of the light-emitting unit 61. Generally, in the case of a ceiling light, the lens module is located below the light-emitting unit 61, and the light-emitting unit 61 emits light downward. Naturally, in the case of a side-emitting lighting fixture such as a wall light or a wall light, the term "below" here refers to the outer surface of the lens cover 1. Therefore, the term "below" defined in this embodiment is based on the light emission direction, not the vertical "below". The term "below" is used merely to make it easier to describe the positional relationship between the first annular lens 2 and the lens cover 1.

[0026] The first annular lens 2 is also annular, and the cross sections at each point on the circumference of the first annular lens 2 are all the same. A light-emitting unit 61 is installed in the first accommodating space 21, and a plurality of light-emitting units 61 may be installed in the first accommodating space 21. The light-emitting unit 61 is preferably an LED bulb.

[0027] The first light incidence surface 22 is an arched surface that rises downward, and the circular arc surface on one side of the arched surface is the first inner light incidence surface 221, and the circular arc surface on the other side is the first outer light incidence surface 222, and the center point of the raised part of the arched surface is the first light incidence intersection O1. As shown in FIG. 2, in a cross section at an arbitrary point in the circumferential direction of the first annular lens 2, the first light incidence intersection O1 is a point. However, in the circumferential direction of the first annular lens 2, the intersection of the first inner light incidence surface 221 and the first outer light incidence surface 222 is a curve. Here, the first light incidence intersection O1 is limited only to describe the positional relationship between it and the optical axis 611 of the light-emitting unit 61.

[0028] The first light exit surface 23 is also an arched surface that is raised downward, but the degree of the raised arc should be smaller than that of the first light entrance surface 22. In order to ensure uniform light emission, the first light exit surface 23 includes a first inner light exit surface facing the center of the lens cover 1, a first lower light exit surface facing downward of the lens cover 1, and a first outer light exit surface facing the outer edge of the lens cover 1. Among them, the first inner light exit surface and the first outer light exit surface are respectively arcuate surfaces on both sides of the arched surface, the first lower light exit surface is an intermediate transition surface, and the first lower light exit surface is preferably perpendicular to the optical axis 611.

[0029] Compared with the prior art, the lens module provided by the present invention has a first light incident intersection O1 between the first inner light incident surface 221 and the first outer light incident surface 222 offset from the optical axis 611 of the light-emitting unit 61, and the first light incident intersection O1 is located between the optical axis 611 and the first outer light incident surface 222, that is, the light-emitting unit 61 is biased toward the first inner light incident surface 221, and the upper half of the first inner light incident surface 221 is close to the light-emitting unit 61, so that the overall light receiving amount of the first inner light incident surface 221 is larger, and more light can be emitted to the center of the lens cover 1 through the first inner light incident surface 221 (especially the upper half of the first inner light incident surface 221) and the first light exit surface 23, as shown in FIG. 9, thereby avoiding the formation of a dark area in the center of the lighting device and ensuring the uniformity of light emission throughout the lighting device.

[0030] In some embodiments, the above-mentioned first light-emitting surface 23 may adopt the structure shown in FIG. 2. Referring to FIG. 2, taking the optical axis 611 as the reference, the distance from the optical axis 611 to the inner edge of the first light-emitting surface 23 is greater than the distance from the optical axis 611 to the outer edge of the first light-emitting surface 23.

[0031] The first light exit surface 23 includes a first inner light exit surface, a first lower light exit surface, and a first outer light exit surface, and the distance from the optical axis 611 to the inner edge of the first light exit surface 23 is greater than the distance from the optical axis 611 to the outer edge of the first light exit surface 23, that is, the radial distance from the first inner light exit surface to the optical axis 611 is greater than the radial distance from the first outer light exit surface to the optical axis 611, and the light exit area of ​​the first inner light exit surface is greater than the light exit area of ​​the first outer light exit surface, and further increases the amount of light emitted to the central part of the lens cover 1, thereby further improving the problem of the dark area in the center.

[0032] In some embodiments, the above-mentioned lens module may adopt the structure shown in Figures 1 and 3. Referring to Figures 1 and 3, the lens module further includes a second annular lens 3 molded on the lower surface of the lens cover 1 and protruding downward, and the second annular lens 3 is located radially outside the first annular lens 2.

[0033] The second annular lens 3 has a second accommodating space 31 that accommodates the light-emitting unit 61, and the inner wall of the second accommodating space 31 forms a second light incident surface 32 that is arranged symmetrically with respect to the optical axis 611, and the outer surface of the second annular lens 3 forms a second light exit surface 33 that is arranged symmetrically with respect to the optical axis 611.

[0034] A second annular lens 3 is also provided surrounding the lens cover 1 , preferably with the second annular lens 3 closer to the outer edge of the lens cover 1 and the first annular lens 2 closer to the inner edge of the lens cover 1 .

[0035] The cross sections of the second annular lens 3 at each point in the circumferential direction are all the same. A light emitting unit 61 is disposed in the second accommodating space 31, and a plurality of light emitting units 61 may be disposed in the second accommodating space 31.

[0036] As shown in FIG. 3, the second light incidence surface 32 is also an arched surface that rises downward, and the circular arc surface on one side of the arched surface is the second inner light incidence surface 321, and the circular arc surface on the other side is the second outer light incidence surface 322, and the center point of the raised part of the arched surface is the second light incidence intersection O2. Note that, in a cross section at any point in the circumferential direction of the second annular lens 3, the second light incidence intersection O2 is a point. However, in the circumferential direction of the second annular lens 3, the intersection of the second inner light incidence surface 321 and the second outer light incidence surface 322 is a curve. Here, the second light incidence intersection O2 is limited only to describe the positional relationship between it and the optical axis 611 of the light-emitting unit 61.

[0037] The second light exit surface 33 is also an arched surface that is raised downward, but the degree of the raised arc should be smaller than that of the second light entrance surface 32. In order to ensure uniform light emission, the second light exit surface 33 includes a second inner light exit surface facing the center of the lens cover 1, a second lower light exit surface facing downward of the lens cover 1, and a second outer light exit surface facing the outer edge of the lens cover 1. Among them, the second inner light exit surface and the second outer light exit surface are respectively arcuate surfaces on both sides of the arched surface, the second lower light exit surface is an intermediate transition surface, and the second lower light exit surface is preferably perpendicular to the optical axis 611.

[0038] A plurality of light-emitting units 61 are also installed in the second accommodation space 31, and their role is to distribute light like the first annular lens 2. The only difference between the second annular lens 3 and the first annular lens 2 is that the second light entrance surface 32 is symmetrically arranged with respect to the optical axis 611, and the second light exit surface 33 is similarly symmetrically arranged with respect to the optical axis 611. That is, as shown in FIG. 10, the second annular lens 3 emits light uniformly on both sides.

[0039] By adding a second annular lens 3 to the outside of the first annular lens 2, the amount of light emitted from the outer edge of the lens module can be increased, and the light emission of the lighting fixture can be made uniform. Preferably, the combination of the second annular lens 3 and the first annular lens 2 is applied to large and medium-sized lighting fixtures.

[0040] In another modified embodiment, the above lens module further includes a second annular lens 3 molded on the underside of the lens cover 1 and protruding downward, the second annular lens 3 is located radially outside the first annular lens 2, and the second annular lens 3 has a second accommodating space 31 for accommodating the light-emitting unit 61, the inner wall of the second accommodating space 31 forms a second light incident surface 32, and the outer surface of the second annular lens 3 forms a second light exit surface 33.

[0041] The second light incident surface 32 includes a second inner light incident surface 321 and a second outer light incident surface 322, the second inner light incident surface 321 faces the center of the lens cover 1 and the second outer light incident surface 322 faces the outer edge of the lens cover 1, however, with respect to the optical axis 611, the second light incident intersection of the second inner light incident surface 321 and the second outer light incident surface 322 is offset from the optical axis 611, and the second light incident intersection is located between the optical axis 611 and the second outer light incident surface 322.

[0042] With the optical axis 611 taken as a reference, the distance from the optical axis 611 to the inner edge of the second light emitting surface 33 is greater than the distance from the optical axis 611 to the outer edge of the second light emitting surface 33 .

[0043] Preferably, the structure of the second annular lens 3 is completely the same as that of the first annular lens 2, except that the second annular lens 3 is closer to the outer edge of the lens cover 1 and the first annular lens 2 is closer to the inner edge of the lens cover 1.

[0044] By adding a second annular lens 3 to the outside of the first annular lens 2, the amount of light emitted from the outer edge of the lens module can be increased, and the light emission of the lighting fixture can be made uniform. Preferably, the combination of the second annular lens 3 and the first annular lens 2 is applied to a small-sized lighting fixture.

[0045] In some embodiments, the above-mentioned lens module may adopt the structure shown in Figures 1, 4 to 8. Referring to Figures 1, 4 to 8, a plurality of compensation lenses 4 are further molded on the lower surface of the lens cover 1, and the plurality of compensation lenses 4 are located between the first annular lens 2 and the second annular lens 3.

[0046] The compensation lens 4 has a third accommodating space, in which the light emitting unit 61 is disposed, an inner wall surface of the third accommodating space forms a third light incident surface, and an outer wall surface of the compensation lens 4 forms a third light exit surface.

[0047] The compensation lens 4 has a strip-like structure, one end of which contacts the first annular lens 2 and the other end of which contacts the second annular lens 3 .

[0048] Since the second annular lens 3 and the first annular lens 2 are spaced apart along the radial direction and have no overlapping portions, there is a possibility that there will be a portion between the first annular lens 2 and the second annular lens 3 from which light does not exit, resulting in a dark area. By providing multiple compensation lenses 4 between the first annular lens 2 and the second annular lens 3, the light distribution between the first annular lens 2 and the second annular lens 3 can be compensated, thereby avoiding the problem of dark areas being created.

[0049] In some embodiments, the above-mentioned first annular lens 2 and second annular lens 3 may adopt the structures shown in Figures 1, 4 and 5. Referring to Figures 1, 4 and 5, the first annular lens 2 includes a plurality of first sub-lenses 24 spaced apart along the circumferential direction, and the second annular lens 3 includes a plurality of second sub-lenses 34 spaced apart along the circumferential direction, the second sub-lenses 34 and the first sub-lenses 24 have a one-to-one correspondence in the radial direction, and the above-mentioned compensation lens 4 is provided between the end of the second sub-lens 34 and the end of the first sub-lens 24.

[0050] The first annular lens 2 is designed as a multi-stage first sub-lens 24, and the second annular lens 3 is designed as a multi-stage second sub-lens 34. Compared to the overall annular structure, the split-stage sub-lenses are more suitable for the light source substrate 6 on which the light emitting units 61 are provided.

[0051] Specifically, as shown in Fig. 5, in order to simplify the structure and manufacturing process of the light source substrate 6, the light source substrate 6 is generally an annular plate structure formed by joining multiple stages of arc-shaped plates. The light source substrate 6 formed by joining multiple stages of arc-shaped plates is easier to manufacture than an integral annular structure, and is also easier to assemble using the base plate 5 that fixes the light source substrate 6. In order to accommodate the structure of the light source substrate 6, the first annular lens 2 and the second annular lens 3 in this embodiment are designed as separate stages.

[0052] In addition, in order to solve the problem that there is no corresponding light-emitting unit 61 at the end of the sub-lens, the above-mentioned compensation lens 4 is provided between the end of the second sub-lens 34 and the end of the first sub-lens 24, thereby avoiding the occurrence of dark areas at the end of the sub-lens, which would affect the lighting effect.

[0053] 4 to 8, based on the same inventive concept, an embodiment of the present application also provides a lighting fixture including a base plate 5, a light source substrate 6, and the above-mentioned lens module. The light source substrate 6 is fixedly provided on the base plate 5, a plurality of light emitting units 61 are provided on the light source substrate 6, and the lens module is provided to cover the lower side of the light source substrate 6.

[0054] Both the light source substrate 6 and the lens module have an annular structure, and when the lens module is provided to cover the lower side of the light source substrate 6, both are fixed on the base plate 5. The term "below" as used herein is defined by the light emission direction of the light emitting unit 61. In general, in the case of a ceiling light, the lens module is located below the light emitting unit 61, and the light emitting unit 61 emits light downward. Naturally, in the case of a side-emitting lighting fixture such as a wall light or a wall light, the term "below" here refers to the outer surface of the lens cover 1. Therefore, the term "below" as used herein is based on the light emission direction, not the vertical "below". The term "below" is used merely to make it easier to describe the positional relationship between the base plate 5, the light source substrate 6, and the lens module.

[0055] A plurality of light emitting units 61 are provided on the light source substrate 6. When the lens module only has the first annular lens 2, the plurality of light emitting units 61 are arranged in at least one revolution and are correspondingly located in the first accommodating space 21. When the lens module has the first annular lens 2 and the second annular lens 3, the plurality of light emitting units 61 are arranged in at least two revolutions, one of which is arranged in the first accommodating space 21 and the other is arranged in the second accommodating space 31. When the lens module further has the compensation lens 4, at least one light emitting unit 61 is arranged in the third accommodating space of the compensation lens 4.

[0056] Since the lighting fixture provided by the present invention adopts the above-mentioned lens module, the light-emitting unit 61 in the first accommodating space 21 is biased toward the first inner light incident surface 221, and the upper half of the first inner light incident surface 221 is close to the light-emitting unit 61, so that the overall light receiving amount of the first inner light incident surface 221 is larger, and more light can be emitted to the center of the lens cover 1 through the first inner light incident surface 221 (especially the upper half of the first inner light incident surface 221) and the first light exit surface 23, thereby avoiding the creation of a dark area in the center of the lighting fixture and ensuring the uniformity of light emission throughout the entire lighting fixture.

[0057] In some embodiments, the structure shown in Figures 1 and 3 may be adopted between the above-mentioned lens cover 1 and the light source substrate 6, in which a plurality of lock hooks 11 are provided on the inner and outer peripheral edges of the lens cover 1, respectively, and the lock hooks 11 abut against the upper surface of the light source substrate 6.

[0058] The lens cover 1 is disposed to cover the underside of the light source board 6, and the lock hook 11 abuts against and restricts the light source board 6 in the vertical direction, thereby ensuring that the connection between the lens cover 1 and the light source board 6 is stable and no shaking occurs in the vertical direction.

[0059] After the lens cover 1 is assembled to the light source board 6, the whole is fastened onto the base plate 5 with bolts.

[0060] In some embodiments, the above-mentioned lighting device may adopt the structure shown in Figures 4 and 5. Referring to Figures 4 and 5, a downwardly protruding annular boss 51 is provided on the base plate 5, the light source board 6 and the lens cover 1 are fixed on the annular boss 51, and the lighting device further includes a driving box 7 fixed on the base plate 5 and located in the annular inner space of the annular boss 51. In addition, a lampshade is further provided below the lens module and the driving box 7.

[0061] The driving box 7 is disposed in the internal space of the annular boss 51, i.e., in the hollow portion in the center of the lens module. By incorporating the driving box 7 in the center of the lens module, the space used by the entire lighting fixture can be reduced and its layout can be optimized.

[0062] The annular boss 51 protrudes downward to fix the light source board 6 and the lens module, and the underside of the lens module and the underside of the driving box 7 are approximately flush with each other, or the underside of the lens module is slightly higher than the underside of the driving box 7, thereby preventing the driving box 7 from blocking light and affecting the lighting effect of the lighting fixture.

[0063] The above is merely a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. The lens cover (1) has an annular structure, and a first annular lens (2) is molded on the lower surface of the lens cover (1) and protrudes downward, The first annular lens (2) has a first accommodating space (21) for accommodating a light-emitting unit (61), an inner wall of the first accommodating space (21) forms a first light incident surface (22), and an outer surface of the first annular lens (2) forms a first light exit surface (23); the first light incident surface (22) includes a first inner light incident surface (221) and a first outer light incident surface (222), the first inner light incident surface (221) faces the center of the lens cover (1), and the first outer light incident surface (222) faces the outer edge of the lens cover (1); and, when the optical axis (611) of the light emitting unit (61) is taken as a reference, a first light incident intersection of the first inner light incident surface (221) and the first outer light incident surface (222) is offset from the optical axis (611), and the first light incident intersection is located between the optical axis (611) and the first outer light incident surface (222); A lens module comprising:

2. The lens module of claim 1, characterized in that, based on the optical axis (611), the distance from the optical axis (611) to the inner edge of the first light exit surface (23) is greater than the distance from the optical axis (611) to the outer edge of the first light exit surface (23).

3. The lens module further includes a second annular lens (3) molded on a lower surface of the lens cover (1) and protruding downward, the second annular lens (3) being located radially outward of the first annular lens (2); The second annular lens (3) has a second accommodation space (31) that accommodates the light-emitting unit (61), and an inner wall of the second accommodation space (31) forms a second light incident surface (32), and the second light incident surface (32) is arranged symmetrically with respect to the optical axis (611); The lens module according to claim 2, characterized in that an outer surface of the second annular lens (3) forms a second light exit surface (33), and the second light exit surface (33) is arranged symmetrically with respect to the optical axis (611).

4. The lens module further includes a second annular lens (3) molded on a lower surface of the lens cover (1) and protruding downward, the second annular lens (3) being located radially outward of the first annular lens (2); The second annular lens (3) has a second accommodation space (31) that accommodates the light-emitting unit (61), an inner wall of the second accommodation space (31) forms a second light incident surface (32), and an outer surface of the second annular lens (3) forms a second light exit surface (33); The lens module of claim 2, characterized in that the second light incident surface (32) includes a second inner light incident surface (321) and a second outer light incident surface (322), the second inner light incident surface (321) faces the center of the lens cover (1) and the second outer light incident surface (322) faces the outer edge of the lens cover (1), and, with respect to the optical axis (611), a second light incident intersection of the second inner light incident surface (321) and the second outer light incident surface (322) is offset from the optical axis (611), and the second light incident intersection is located between the optical axis (611) and the second outer light incident surface (322).

5. The lens module of claim 4, characterized in that, based on the optical axis (611), the distance from the optical axis (611) to the inner edge of the second light exit surface (33) is greater than the distance from the optical axis (611) to the outer edge of the second light exit surface (33).

6. 4. The lens module of claim 3, wherein a plurality of compensation lenses (4) are further molded on the lower surface of the lens cover (1), and the plurality of compensation lenses (4) are located between the first annular lens (2) and the second annular lens (3).

7. 6. The lens module of claim 5, wherein a plurality of compensation lenses (4) are further molded on the lower surface of the lens cover (1), and the plurality of compensation lenses (4) are located between the first annular lens (2) and the second annular lens (3).

8. The first annular lens (2) includes a plurality of stages of first sub-lenses (24) spaced apart along the circumferential direction, and the second annular lens (3) includes a plurality of stages of second sub-lenses (34) spaced apart along the circumferential direction, 7. The lens module according to claim 6, wherein the second sub-lens (34) and the first sub-lens (24) correspond one-to-one in the radial direction, and the compensation lens (4) is provided between an end of the second sub-lens (34) and an end of the first sub-lens (24).

9. The first annular lens (2) includes a plurality of stages of first sub-lenses (24) spaced apart along the circumferential direction, and the second annular lens (3) includes a plurality of stages of second sub-lenses (34) spaced apart along the circumferential direction, 8. The lens module according to claim 7, characterized in that the second sub-lens (34) and the first sub-lens (24) correspond one-to-one in the radial direction, and the compensation lens (4) is provided between an end of the second sub-lens (34) and an end of the first sub-lens (24).

10. A base plate (5); a light source substrate (6) having an annular structure fixed on the base plate (5), the light source substrate having a plurality of light emitting units (61) provided thereon; The lens module according to any one of claims 1 to 9, which is provided to cover a lower portion of the light source substrate (6); A lighting fixture comprising:

11. The lighting device according to claim 10, characterized in that a plurality of locking hooks (11) are provided on the inner and outer peripheral edges of the lens cover (1), and the locking hooks (11) abut against the upper surface of the light source substrate (6).

12. A downwardly protruding annular boss (51) is provided on the base plate (5), and the light source substrate (6) and the lens cover (1) are fixed on the annular boss (51); 11. The luminaire according to claim 10, further comprising a drive box (7) fixedly mounted on the base plate (5) and located in the annular inner space of the annular boss (51).

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