A lens, a lens mounting structure and its module

Abstract

This application relates to the field of LED lighting optics technology, and more particularly to a lens, a lens mounting structure, and a module thereof. The lens body, along the optical path, sequentially includes a light guide post, a condenser cup, and a condenser lens. The light guide post has a smaller cross-sectional area at its light-incident end than at its light-outceasing end. The condenser cup is located on one side of the light-outceasing end of the light guide post, and its outer wall extends outward to form a cup-shaped profile. The outer walls on both sides are asymmetrically arranged in a first direction, causing the light to be deflected and emitted in the first direction after total internal reflection. The condenser lens has a convex light-emitting surface. The mounting structure includes a base and a light-blocking plate. Light-blocking grooves are provided between adjacent mounting slots on the base, and inserts are provided on the light-blocking plate that fit into the light-blocking grooves. The module includes a chassis and a mounting structure mounted on the chassis. A sealing ring is provided between the base and the chassis. This application achieves multi-angle deflection and light distribution through the asymmetrical structure of the condenser cup, and reduces crosstalk and scattering through the light-blocking grooves and the light-blocking plate, thereby improving lighting clarity.

Description

Technical Field

[0001] This application relates to the field of LED lighting optical technology, and in particular to a lens, a lens mounting structure and a module thereof. Background Technology

[0002] In LED lighting modules, the lens is the core optical component for achieving light distribution control. Existing LED lenses typically consist of two parts: a protrusion and a light guide post, which are directly connected. During use, the light emitted from the LED light source is guided through the light guide post and then directly reaches the protrusion for refraction.

[0003] However, this structure has a single light distribution method, with light undergoing only one refraction process before exiting. Its ability to control the direction of light is limited, making it difficult to achieve multi-angle deflection illumination. In applications such as road lighting where light distribution is critical, this simple optical path structure cannot effectively control the light output angles in various directions, resulting in unsatisfactory light distribution and failing to meet actual lighting needs.

[0004] Based on the above, this application proposes a lens, a lens mounting structure and its module, which can effectively solve the above problems. Summary of the Invention

[0005] To address the problem that existing lenses, with their protruding parts directly connected to the light guide post, result in a single optical path and an inability to form multi-angle deflection illumination, this application proposes a lens, a lens mounting structure, and a module thereof.

[0006] A lens, comprising:

[0007] The lens body is integrally formed from a light-transmitting material, and a light guide column, a condenser cup, and a condenser lens are sequentially formed along the light path direction; the light guide column includes an input end and an output end, the cross-sectional area of ​​the input end is smaller than the cross-sectional area of ​​the output end, and the cross-section of the light guide column is rectangular;

[0008] The spotlight cup is disposed on one side of the light-emitting end of the light guide column. The spotlight cup is a solid, translucent structure, and its outer wall extends outward from the light-emitting end to form a cup-shaped profile. The two outer wall surfaces of the spotlight cup are asymmetrically arranged in a first direction, with the extension length of one outer wall surface being greater than that of the other outer wall surface. The two outer wall surfaces of the spotlight cup are symmetrically arranged in a second direction. The first direction is consistent with the short side direction of the rectangular cross-section, and the second direction is consistent with the long side direction of the rectangular cross-section. The first direction and the second direction are perpendicular to each other. The light transmitted through the light guide column undergoes total internal reflection at the outer wall surface of the spotlight cup.

[0009] The condensing lens is disposed on the side of the condenser cup away from the light guide column, and the condensing lens has a convex light-emitting surface.

[0010] By adopting the above technical solution, a spotlight cup with a solid light-transmitting structure is added between the light guide column and the condenser lens, so that the light experiences total internal reflection on the outer wall surface of the spotlight cup before exiting and then is refracted and emitted by the condenser lens. The outer wall surfaces on both sides of the spotlight cup are asymmetrically arranged in the first direction, resulting in the deflection and convergence of the light in the first direction after total internal reflection. At the same time, the outer wall surfaces on both sides of the spotlight cup are symmetrically arranged in the second direction, so that the light does not deflect in the second direction and is evenly distributed on both sides of the central axis. The short side direction of the rectangular cross-section of the light guide column is consistent with the asymmetric direction of the spotlight cup, and the light experiences more total internal reflections in the short side direction during conduction in the light guide column and is initially converged. After entering the spotlight cup, it is further deflected and compressed by the asymmetric outer wall surface. The two-stage optical structure forms a synergistic converging effect in the first direction; while the long side direction of the rectangle is consistent with the symmetric direction of the spotlight cup, the light maintains a large expansion angle in the light guide column and does not deflect in the spotlight cup and maintains a wide-angle distribution. Therefore, the lens body forms significantly different light-emitting angles in the first direction and the second direction, realizing differential light distribution.

[0011] In one embodiment, after the light is conducted through the light guide column and undergoes total internal reflection on the outer wall surface of the spotlight cup, a first focus where the light beam converges is formed on the light-incident surface side of the condenser lens, and a second focus where the light beams intersect is formed on the light-emitting surface side after passing through the condenser lens; in the first direction, the first focus deviates from the central axis of the light guide column, and in the second direction, the first focus is located on or near the central axis of the light guide column. By adopting the above technical solution, the asymmetric structure of the spotlight cup causes the first focus to deviate from the central axis in the first direction, thereby causing the overall emitted light beam to deflect in the first direction; while in the second direction, the focus remains near the central axis, maintaining symmetric light distribution in this direction, and thus the light distribution angle of the emitted light beam in the first direction is different from that in the second direction.

[0012] In one embodiment, the outer wall of the shorter side of the spotlight cup in the first direction is closer to the central axis of the light guide column and has a larger wall angle. Light transmitted through the light guide column is reflected from this side's outer wall and tends to exit in a direction parallel to the central axis. The outer wall of the longer side is farther from the central axis and has a larger curvature. Light transmitted through the light guide column is reflected from this side's outer wall and deflected towards the shorter side. By adopting the above technical solution, the larger wall angle of the shorter side results in a smaller reflection angle of the incident light, causing the reflected light to tend to be parallel, thus achieving collimation. The larger curvature of the longer side's outer wall and its greater distance from the central axis cause the incident light to be deflected towards the shorter wall side. The combined geometric differences between the two walls cause the reflected light to be directionally deflected and converged.

[0013] In one embodiment, the lens body has a light emission angle of 9° to 12° in the first direction and a light emission angle of 50° to 60° in the second direction, and the emitted beam is deflected by 3° to 5° in the first direction. By adopting the above technical solution, the narrow-angle light emission in the first direction and the wide-angle light emission in the second direction form a significantly differentiated light distribution, and the overall deflection of the emitted beam in the first direction causes the center of the illumination spot to shift relative to directly below the lens, which can meet the light distribution requirements for cutting off light in the direction of oncoming lanes in road lighting applications.

[0014] In one embodiment, the convex light-emitting surface of the condenser lens is a hemispherical convex surface. By adopting the above technical solution, the hemispherical convex surface has a consistent radius of curvature and refractive power in all directions, so that when the light reflected by the condenser cup is refracted by the condenser lens, the lens itself does not introduce additional directional refraction differences. The differentiated light distribution effect of the emitted light is mainly determined by the asymmetrical structure of the condenser cup and the rectangular cross-section of the light guide column.

[0015] A lens mounting structure includes a base with multiple mounting slots arranged in an array on the base for mounting lens bodies such as the described above. Light-shielding slots are provided between adjacent mounting slots. A light-blocking plate is disposed on the light-emitting side of the lens body, and the light-blocking plate has inserts corresponding to the positions of the light-shielding slots, which are inserted into the light-shielding slots. By adopting the above technical solution, the light-shielding slots on the base form a structural isolation between adjacent lens units, and the light-blocking plate further enhances the isolation effect by inserting the inserts into the light-shielding slots, thereby reducing crosstalk and scattering phenomena between adjacent lenses and improving the clarity of the light spot.

[0016] In one embodiment, the light-blocking plate has light-emitting through holes corresponding to each mounting grid position. By adopting the above technical solution, the light-emitting through holes allow the light emitted from each lens unit to pass through normally, while the non-through-hole areas of the light-blocking plate block stray light outside the target range, thus balancing light emission efficiency and stray light control.

[0017] In one embodiment, a base plate is further included, which is disposed on the light-incident side of the lens body. The base plate has through holes corresponding to each mounting slot for the light-incident end of the light guide post to pass through. By adopting the above technical solution, the base plate positions and limits the light guide post of the lens body from the light-incident side, while restricting stray light from the light-incident side from entering non-corresponding lens units.

[0018] A lens module includes a chassis and the aforementioned lens mounting structure disposed on the chassis. A sealing ring is circumferentially disposed between the bottom surface of the base and the top surface of the chassis. By adopting the above technical solution, the sealing ring is disposed between the connection position of the base and the chassis, forming a sealed protection for the optical cavity, which can effectively prevent external moisture and dust from entering, thereby improving the protection level and service life of the module.

[0019] In one embodiment, a circuit board is provided on the light-incident side of the chassis, and the circuit board is provided with LED light sources that correspond one-to-one with the light-incident ends of the light guide pillars of each lens. By adopting the above technical solution, the LED light sources are arranged one-to-one with the light-incident ends of the light guide pillars of each lens, realizing optical coupling between the light source and the lens, reducing coupling loss, and improving light energy utilization efficiency.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. By setting a spotlight cup and making its two outer walls asymmetrical in the first direction, the light is deflected and emitted in the first direction after total internal reflection. The light path is changed from single refraction to multi-segment light distribution combining total internal reflection and refraction, realizing multi-angle light distribution control. This solves the problem in the prior art where the protrusion is directly connected to the light guide column, resulting in a single light path and the inability to form multi-angle deflection illumination.

[0022] 2. By setting light-shielding grooves between adjacent mounting positions on the base and inserting the blocks on the light-shielding plate into the light-shielding grooves, effective optical isolation is achieved for adjacent lens units, reducing crosstalk and scattering phenomena and improving the clarity of the light spot;

[0023] 3. By installing a sealing ring between the base and the chassis, the overall sealing and protection performance of the module is improved, and its service life is extended. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the overall structure of a lens proposed in this application.

[0025] Figure 2 This is the internal optical path diagram of a lens in the first direction proposed in this application.

[0026] Figure 3 This is the internal optical path diagram of a lens in the second direction proposed in this application.

[0027] Figure 4 These are the thermal diagram and spot diagram of the original lens under simulated conditions of a bare light source of 100 lumens.

[0028] Figure 5 This application presents a thermal diagram and a spot pattern of a lens under simulated conditions of a bare light source of 100 lumens.

[0029] Figure 6 This is a polar coordinate light distribution curve of a lens proposed in this application.

[0030] Figure 7 This is a schematic diagram of the overall structure of a lens, lens mounting structure and its module proposed in this application.

[0031] Figure 8 This is an exploded view of a lens, lens mounting structure and its module as proposed in this application.

[0032] Figure 9 This is a schematic diagram of the structure of a lens, lens mounting structure and light-blocking plate in the module proposed in this application.

[0033] Figure 10 This is a schematic diagram of the base and bottom plate in a lens, lens mounting structure and module proposed in this application.

[0034] Figure 11 This is a schematic cross-sectional view of a lens, lens mounting structure and its module proposed in this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Lens body; 11. Light guide column; 111. Light entrance end; 112. Light exit end; 12. Spotlight cup; 13. Condensing lens; 131. Convex light exiting surface; 14. First focal point; 15. Second focal point; 2. Base; 21. Mounting slot; 22. Light shielding groove; 3. Light blocking plate; 31. Insert block; 32. Light exiting through hole; 4. Base plate; 41. Through hole; 5. Chassis; 6. Sealing ring; 7. Circuit board; 71. LED light source. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-11 This application provides a lens, a lens mounting structure, and a module thereof, which will be described in further detail below.

[0038] A lens module includes a chassis 5, a lens mounting structure, and multiple lenses. The lens mounting structure is disposed on the chassis 5, and the multiple lenses are mounted in the lens mounting structure.

[0039] like Figure 1-6 In this embodiment, the lens includes an integrally formed lens body 1. The lens body 1, along the optical path direction, comprises three functional segments: a light guide post 11, a condenser cup 12, and a condenser lens 13. The lens body 1 is injection molded from a light-transmitting material. In this embodiment, the material of the lens body 1 is polycarbonate. Polycarbonate has high light transmittance and refractive index, as well as good heat resistance and mechanical strength, making it suitable for injection molding and meeting optical-grade surface quality requirements.

[0040] Specifically, the light guide column 11 is a rectangular conical column, including an input end 111 and an output end 112. The input end 111 receives light emitted from the light source, and the output end 112 is connected to the swivel lamp cup 12. The cross-sectional area of ​​the input end 111 is smaller than that of the output end 112, meaning the cross-section of the light guide column 11 gradually increases from the input end 111 to the output end 112. This gradually increases the incident angle of the incident light at the inner wall of the light guide column 11, making it easier to meet the total internal reflection condition and improving the transmission efficiency of light within the light guide column 11. The rectangular cross-section has a short side and a long side. The direction of the short side is defined as the first direction, and the direction of the long side is defined as the second direction. The first direction and the second direction are perpendicular to each other. After the light emitted from the light source enters the light guide column 11 through the input end 111, it undergoes total internal reflection at the side wall of the light guide column 11 and is confined within the column for transmission. Because the light guide post 11 is smaller in size in the first direction, the light undergoes more total internal reflections in that direction, resulting in a higher degree of focusing. In the second direction, its size is larger, so the light undergoes fewer reflections, maintaining a larger spreading angle. The light rays exit from the light-emitting end 112 through the light guide post 11 and enter the saturator cup 12.

[0041] Specifically, the spotlight cup 12 is disposed on one side of the light-emitting end 112 of the light guide column 11. The outer wall of the spotlight cup 12 extends outward from the light-emitting end 112 to form a cup-shaped profile. The inner wall of the spotlight cup 12 is smoothly connected to the light-emitting end 112 of the light guide column 11. The spotlight cup 12 is a solid, transparent structure with no internal cavity. When the light emitted from the light-emitting end 112 of the light guide column 11 reaches the outer wall of the spotlight cup 12, total internal reflection occurs at the interface between the transparent material and the outside air. After being reflected, the light changes its propagation direction and converges towards the direction of the condenser lens 13. The two outer wall surfaces of the spotlight cup 12 in the first direction are asymmetrically arranged, with the extension length of one outer wall surface being greater than the extension length of the other outer wall surface. The outer wall of the shorter extension is closer to the central axis of the light guide 11 and has a steeper surface. Light reflected from this side tends to exit in a parallel direction. The outer wall of the longer extension is farther from the central axis and has a larger curvature. Light reflected from this side is deflected towards the shorter extension. Due to the different extension lengths of the two outer walls, the light after total internal reflection from the outer wall of the condenser 12 is deflected in the first direction, causing the central axis of the incident light to shift. This results in the first focal point 14 formed on the light-incident surface of the condenser lens 13 deviating from the central axis of the light guide 11. The two outer walls of the condenser 12 are symmetrically arranged in the second direction. After reflection from the condenser 12 in the second direction, the light is evenly distributed on both sides of the central axis, and the first focal point 14 is located on or near the central axis in the second direction. The tilt angle of the condenser 12 wall ensures that the angle of incidence when the light reaches the wall is greater than the critical angle.

[0042] Specifically, such as Figure 1-3 A condenser lens 13 is disposed on the side of the condenser cup 12 away from the light guide post 11, and the condenser lens 13 has a convex light-emitting surface 131. In this embodiment, the convex light-emitting surface 131 of the condenser lens 13 is a hemispherical convex surface. The light rays that converge after total internal reflection from the outer wall surface of the condenser cup 12 reach the condenser lens 13, are refracted, and exit from the convex light-emitting surface 131, forming a second focal point 15 on one side of the convex light-emitting surface 131 where the light beams converge. Since the first focal point 14 is deviated from the central axis in the first direction, the outgoing light beam refracted by the condenser lens 13 is deflected as a whole in the first direction. In this embodiment, the total height of the lens body 1 is approximately 21.59 mm, the diameter of the convex light-emitting surface 131 of the condenser lens 13 is approximately 11 mm, and the width of the square substrate at the bottom of the lens body 1 is approximately 13.5 mm. The lens body 1 has a light emission angle of 9° to 12° in the first direction and a light emission angle of 50° to 60° in the second direction, forming a light distribution with a narrow angle in the first direction and a wide angle in the second direction.

[0043] Specifically, such as Figure 4-6The light spot formed by the lens body 1 is a rectangular distribution with a wider horizontal width and a narrower vertical width. Under the condition of optical simulation using a 100-lumen LED light source 71, the light intensity of the bare light source is 37 cd, and the maximum light intensity after being distributed by the lens body 1 can reach 383 cd to 430 cd, with a light intensity ratio of approximately 10.3 to 11.6 times. The 50% beam angle of the emitted beam is approximately 15° in the first direction and approximately 32° in the second direction, and the emitted beam as a whole is deflected by approximately 4° in the first direction. From the polar coordinate light distribution curve, the light intensity is mainly concentrated in the angular range of 0° to -30°, and the light intensity decreases rapidly and cuts off in the positive angular direction, indicating that the asymmetrical structure of the spotlight cup 12 effectively achieves the light deflection and cutoff effect in the first direction.

[0044] In this embodiment, as Figure 7-11 The lens mounting structure includes a base 2, a light-blocking plate 3, and a bottom plate 4.

[0045] Specifically, the base 2 has multiple mounting slots 21 arranged in an array, each mounting slot 21 being used to mount a lens body 1. A light-shielding groove 22 is provided between adjacent mounting slots 21, extending along the boundary of the mounting slot 21 to structurally separate adjacent lens units.

[0046] Specifically, a light-blocking plate 3 is disposed on the light-emitting side of the lens body 1, and a plug 31 corresponding to the position of the light-shielding groove 22 is provided on the light-blocking plate 3. During assembly, the plug 31 is inserted into the light-shielding groove 22, so that the light-blocking plate 3 is fixed to the light-emitting side of the base 2. A light-emitting through hole 32 is opened on the light-blocking plate 3 for each mounting slot 21. The light emitted from each lens unit is emitted through the light-emitting through hole 32. The non-through hole area of ​​the light-blocking plate 3 blocks stray light between adjacent lenses, and works together with the light-shielding groove 22 to achieve optical isolation of adjacent lens units.

[0047] Specifically, the base plate 4 is disposed on the light-incident side of the lens body 1. A through hole 41 is provided on the base plate 4 corresponding to each mounting slot 21, and the light-incident end 111 of the light guide post 11 of each lens body 1 passes through the corresponding through hole 41. The base plate 4 serves to position and limit the light-incident side of the lens body 1, while simultaneously preventing stray light from the light-incident side from entering non-corresponding lens units.

[0048] In this embodiment, the chassis 5 serves as the basic support structure for the module. The lens mounting structure is integrally mounted on the chassis 5, and a sealing ring 6 is provided between the base 2 and the chassis 5. The sealing ring 6 is arranged circumferentially along the mating surface between the base 2 and the chassis 5, forming a seal for the optical cavity and preventing external moisture and dust from entering the internal space of the lens mounting structure.

[0049] Specifically, a circuit board 7 is provided on the light-incident side of the chassis 5, and multiple LED light sources 71 are provided on the circuit board 7. Each LED light source 71 corresponds one-to-one with the light-incident end 111 of the light guide post 11 of each lens. The light emitted by the LED light source 71 is directly coupled into the light-incident end 111 of the corresponding light guide post 11, so as to achieve precise alignment between the light source and the lens.

[0050] The working principle of the lens module provided in this application embodiment is as follows: After the LED light source 71 on the circuit board 7 is powered on and emits light, the light enters the light-incident end 111 of the corresponding light guide post 11. Inside the light guide post 11, the light is conducted to the light-emitting end 112 through total internal reflection of the side wall. After the light is emitted from the light-emitting end 112, it reaches the outer wall surface of the condenser cup 12. Total internal reflection occurs at the outer wall surface and the propagation direction is changed. Since the outer wall surfaces of the condenser cup 12 on both sides in the first direction are asymmetrically arranged, the reflected light is deflected and converges in the first direction. The light beam converges to form a first focal point 14 off the central axis; the converged light beam is refracted by the hemispherical convex light-emitting surface 131 of the condenser lens 13 and emitted, forming a narrow-angle light distribution in the first direction and a wide-angle light distribution in the second direction. The emitted light spot is a rectangular distribution with a wide horizontal and narrow vertical direction, and the entire beam is deflected in the first direction; the emitted light beam is emitted through the light-emitting through hole 32 on the light-blocking plate 3. The light-blocking groove 22 and the insert block 31 of the light-blocking plate 3 jointly isolate the light from adjacent lens units, reducing cross-beaming and scattering, thereby obtaining a light distribution effect with high clarity.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lens, characterized in that, include: The lens body (1) is integrally formed from a light-transmitting material, and a light guide column (11), a condenser cup (12) and a condenser lens (13) are sequentially formed along the light path direction; The light guide post (11) includes an input end (111) and an output end (112). The cross-sectional area of ​​the input end (111) is smaller than that of the output end (112). The cross-section of the light guide post (11) is rectangular. The spotlight cup (12) is disposed on one side of the light-emitting end (112) of the light guide column (11). The spotlight cup (12) is a solid, light-transmitting structure. The outer wall of the spotlight cup (12) extends outward from the light-emitting end (112) to form a cup-shaped outline. The outer walls of the spotlight cup (12) are asymmetrically arranged on both sides in the first direction, wherein the extension length of one side of the outer wall is greater than the extension length of the other side of the outer wall. The outer walls of the spotlight cup (12) are symmetrically arranged on both sides in the second direction. The first direction is consistent with the short side direction of the rectangular cross-section, and the second direction is consistent with the long side direction of the rectangular cross-section. The first direction and the second direction are perpendicular to each other. The light transmitted by the light guide column (11) undergoes total internal reflection at the outer wall of the spotlight cup (12). The condenser lens (13) is disposed on the side of the condenser lamp cup (12) away from the light guide column (11), and the condenser lens (13) has a convex light-emitting surface (131).

2. A lens according to claim 1, characterized in that, After the light is transmitted through the light guide column (11) and undergoes total internal reflection on the outer wall of the condenser lamp cup (12), a first focal point (14) is formed on the light-incident surface side of the condenser lens (13), and a second focal point (15) is formed on the light-out surface side after exiting the condenser lens (13). In the first direction, the first focal point (14) is deviated from the central axis of the light guide column (11), and in the second direction, the first focal point (14) is located on or near the central axis of the light guide column (11).

3. A lens according to claim 1, characterized in that, The outer wall of the spotlight cup (12) with a shorter extension length in the first direction is closer to the central axis of the light guide column (11) and has a larger wall inclination angle. The light transmitted by the light guide column (11) tends to be emitted in a direction parallel to the central axis after being reflected by the outer wall of this side. The outer wall of the side with a longer extension length is farther from the central axis and has a larger wall curvature. The light transmitted by the light guide column (11) is deflected towards the side with a shorter extension length after being reflected by the outer wall of this side.

4. A lens according to claim 3, characterized in that, The lens body (1) has a light emission angle of 9° to 12° in the first direction and a light emission angle of 50° to 60° in the second direction, and the emitted beam is deflected by 3° to 5° in the first direction.

5. A lens according to claim 1, characterized in that, The convex light-emitting surface (131) of the condenser lens (13) is a hemispherical convex surface.

6. A lens mounting structure, characterized in that, include: The base (2) has a plurality of mounting slots (21) arranged in an array on the base (2) for mounting the lens body (1) as described in any one of claims 1-5, and a light-shielding groove (22) is provided between adjacent mounting slots (21); A light-blocking plate (3) is provided on the light-emitting side of the lens body (1). The light-blocking plate (3) is provided with a plug (31) corresponding to the position of the light-blocking groove (22). The plug (31) is inserted into the light-blocking groove (22).

7. A lens mounting structure according to claim 6, characterized in that, The light-blocking plate (3) has a light-emitting hole (32) corresponding to each of the mounting slots (21).

8. A lens mounting structure according to claim 6, characterized in that, It also includes a base plate (4), which is disposed on the light-incident side of the lens body (1). The base plate (4) has through holes (41) for the light-incident end (111) of the light guide post (11) to pass through each of the mounting slots (21).

9. A lens module, characterized in that, include: Chassis (5), and The lens mounting structure as described in any one of claims 6-8 is provided on the chassis (5), wherein a sealing ring (6) is provided circumferentially between the bottom surface of the base (2) and the top surface of the chassis (5).

10. A lens module according to claim 9, characterized in that, The chassis (5) has a circuit board (7) on its light-incident side, and the circuit board (7) has an LED light source (71) that corresponds one-to-one with the light-incident end (111) of the light guide column (11) of each lens.

Images