Reflection cup lens
By setting toothed ridges and triangular pyramidal grooves on the sidewall of the reflector lens, the structure of the reflector lens is improved, the problem of discontinuous light spot is solved, and better light mixing effect and illumination uniformity are achieved.
Patent Information
- Application Number
- CN202423156820.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-20
AI Technical Summary
In existing basic lighting fixtures, the gaps in large light sources composed of 2835 or 3030 light sources cause discontinuous light spots, affecting the light mixing effect and resulting in ring-shaped or radial streaks.
A toothed protrusion is provided on the outer side wall of the reflective cup lens. The toothed protrusion has a triangular cross-section and extends in an arc to form a vortex-like structure. A triangular pyramidal groove is provided on the inner side of the light inlet to achieve two-stage light mixing. The lens part and the reflective part are an integral structure.
It improves the light reflection effect and light output rate, eliminates unwanted streaks on the light spot, and enhances the light mixing effect and illumination uniformity.
Smart Images
Figure CN223550321U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lighting equipment technology, and in particular to a reflective cup lens. Background Technology
[0002] For basic lighting fixtures, especially small and medium-power ceiling lights, due to their wide application and large usage, it is essential to improve the cost-effectiveness of basic lighting fixtures in order to balance sales volume and quality. Reflector cup lenses, with their lightweight and low cost, perfectly align with the market trend of high cost-effectiveness and are therefore widely used in basic lighting fixtures.
[0003] Currently, most basic lighting fixtures use SMD surface-mount light sources such as 2835 or 3030 for light distribution. However, the light distribution of this type of light source is relatively complex. When multiple 2835 or 3030 light sources are combined to form a large light source, the gap between the small light sources is at least 0.5mm, which will cause the light-emitting surface of the large light source to be discontinuous. The light spot will show ring or radial patterns, which will affect the light mixing effect of the lighting fixture. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a reflective cup lens that can effectively improve the light spot mixing effect.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a reflective cup lens, including a lens part and a reflective part. The reflective part has an annular sidewall and a light inlet and a light outlet formed by the sidewall. The lens part is located at the center of the light inlet. The side of the lens part near the light inlet is the light inlet surface, and the side of the lens part near the light outlet is the light outlet surface. Multiple tooth-shaped protrusions are arranged in an annular pattern on the outer surface of the sidewall. The tooth-shaped protrusions extend from the light inlet to the light outlet. The cross-section of the tooth-shaped protrusions is triangular, and the included angle of the tip is in the range of 75° to 95°. The tooth-shaped protrusions extend in an arc on the outer surface of the sidewall.
[0006] As an improvement to the above scheme: the radial angle between the extension start point and the extension end point of the toothed protrusion is ≤15°.
[0007] As an improvement to the above solution: the toothed ridge is a multi-segment structure composed of multiple ridge blocks connected in sequence. The top of the ridge block is an arc shape that curves upward from the middle to both ends. Adjacent ridge blocks are connected by a transition plane and form a stepped structure at the connection point.
[0008] As an improvement to the above solution: the inner side of the light inlet is provided with a plurality of triangular pyramidal grooves, the triangular pyramidal grooves extending axially from the opening of the light inlet to connect with the light-inlet surface of the lens, and one end of the triangular pyramidal groove at the opening of the light inlet is a cone tip; the plurality of triangular pyramidal grooves are arranged in a ring on the inner side of the light inlet.
[0009] As an improvement to the above scheme: the end of the triangular pyramidal groove that connects to the light-incident surface of the lens has a sawtooth-shaped microstructure.
[0010] As an improvement to the above solution: both the light-incident surface and the light-exit surface of the lens are concave arc surfaces facing the light-exit port, and the curvature of the light-incident surface is smaller than that of the light-exit surface.
[0011] As an improvement to the above solution, the lens part and the reflective part are an integral structure.
[0012] As an improvement to the above scheme, the included angle of the tip of the toothed protrusion is in the range of 75 to 85°.
[0013] As an improvement to the above solution: the light-emitting surface of the lens is covered with an array of beaded microstructures.
[0014] The beneficial effects of this invention are as follows: By improving the structure of the reflective cup lens, toothed protrusions are provided on the outer surface of the sidewall that makes up the reflective part. These toothed protrusions are arranged in an arc-shaped manner to form a vortex-like structure on the outer surface of the sidewall. The toothed protrusions can reflect the light transmitted from inside the reflective cup lens back, allowing the light to exit from the light outlet of the reflective cup lens and reducing light scattering. This effectively improves the reflectivity and light extraction efficiency of the reflective cup lens. The vortex direction of the toothed protrusions on the sidewall effectively prevents radial stripes from appearing on the light spot. This improves the light mixing effect and eliminates unwanted streaks on the light spot. Attached Figure Description
[0015] Figure 1 This is an isometric drawing of the structure of this utility model;
[0016] Figure 2 This is a side view of the present invention;
[0017] Figure 3 This is a schematic diagram showing the arrangement of the toothed ridges;
[0018] Figure 4 This is a schematic diagram showing the reflection of internal light when the included angle at the tip of the toothed ridge is 95°.
[0019] Figure 5 This is a schematic diagram showing the reflection of internal light when the included angle at the tip of the toothed ridge is 75°.
[0020] Figure 6 This is a schematic diagram showing the transmission of a small portion of light when the included angle of the tips of the toothed ridges is 95°.
[0021] Figure 7 This is a schematic diagram showing the transmission of a small portion of light when the included angle of the tips of the toothed ridges is 75°.
[0022] Figure 8 This is a side view of the toothed ridges on the side wall.
[0023] The markings in the diagram are as follows: 100-lens section, 110-incident light surface, 120-outcident light surface, 200-reflecting section, 210-side wall, 220-incident light port, 230-outcident light port, 240-triangular pyramidal groove, 300-tooth-shaped ridge, 310-protruding ridge block, 320-transition plane. Detailed Implementation
[0024] To facilitate understanding of this utility model, the following description, in conjunction with the accompanying drawings, will provide further details.
[0025] In the description of this utility model, it should be noted that the terms "front", "rear", "left", "right", "up", "down", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0026] like Figure 1 and Figure 2 As shown, the reflective cup lens disclosed in this utility model includes a lens portion 100 and a reflective portion 200. The reflective portion 200 is formed by a side wall 210 forming a ring. The overall structure of the reflective portion 200 is a flared trumpet-shaped structure. The side wall 210 forms an inlet 220 and an outlet 230 at both ends of the reflective portion 200, respectively. The diameter of the inlet 220 is smaller than the diameter of the outlet 230. The inner surface of the side wall 210 is a reflective surface for incident light. The reflective portion 200 is used to reflect incident light and prevent light leakage. The incident light enters the interior of the reflective portion 200 through the inlet 220. Light rays with a large incident angle are reflected by the reflective surface of the reflective portion 200, changing their exit angle, and then exit through the outlet 230. A lens section 100 is positioned at the center of the light inlet 220. The side of the lens section 100 closest to the light inlet 220 is the light-incident surface 110, and the side of the lens section 100 closest to the light outlet 230 is the light-outlet surface 120. An array of beaded microstructures is coated on the light-outlet surface 120 of the lens section 100 to achieve light mixing. The lens section 100 is used to transmit incident light rays to adjust the exit angle of the light. Incident light rays with multiple emission angles emitted from the light source enter through the light inlet 220, pass through the light-incident surface 110, and then pass through the lens section 100. Under the refraction of the lens section 100, the exit angle is changed to form relatively uniform parallel light rays, which then pass through the light outlet surface 120 and exit through the light outlet 230.
[0027] like Figure 2As shown, in this invention, both the light-incident surface 110 and the light-exit surface 120 of the lens section 100 are curved surfaces. Both the light-incident surface 110 and the light-exit surface 120 are concave towards the light-exit port 230, and the curvature of the light-incident surface 110 is limited to be smaller than that of the light-exit surface 120. With this structure, the lens section 100 can adjust the angle of the light rays incident through the light-incident port 220, refracting the light rays passing through the lens section 100 into a more parallel fiber bundle, making the light distribution more uniform, thereby effectively improving the lighting effect.
[0028] To reduce the production cost of the reflector lens, the lens part 100 and the reflector part 200 in this invention adopt an integrated structure, so that the lens part 100 and the reflector part 200 can be directly formed by injection molding using a single mold. There is no need for assembly between the lens part 100 and the reflector part 200, thereby reducing the complexity of production and shortening the production process.
[0029] To address the problem of poor light mixing caused by ring-shaped or radial streaks in the light spot in existing reflective cup lenses, this invention improves the structure of the reflective cup lens, such as... Figures 1 to 3 As shown, toothed ridges 300 are provided on the outer surface of the sidewall 210 that constitutes the reflector 200. Each toothed ridge 300 is a strip-shaped protrusion with a triangular cross-section. A single toothed ridge 300 extends from the light inlet 220 to the light outlet 230 on the outer surface of the sidewall 210, and multiple toothed ridges 300 are continuously arranged in a ring array on the outer surface of the sidewall 210. In this invention, the extension path of the toothed ridges 300 is not straight, but rather... Figure 1 and Figure 3 As shown, the toothed ridges extend along an arc. With the center of the lens portion 100 as a reference point, there is a certain range of radial angles between the starting and ending points of the toothed ridges 300. All the toothed ridges 300 extend in an arc, resulting in a spiral arrangement that avoids radial stripes in the light spot and effectively improves the light mixing effect. Furthermore, considering manufacturing processes, this invention limits the arc extension of the toothed ridges 300, ensuring that the radial angle between the starting and ending points is no greater than 15°. Specifically, the angle between the line connecting the center of the lens portion 100 and the starting point of the toothed ridge 300 and the line connecting the center of the lens portion 100 and the ending point of the toothed ridge 300 is ≤15°. If this angle is greater than 15°, a negative draft angle will occur during injection molding, increasing the difficulty of demolding. This invention, by limiting the angle, effectively reduces the manufacturing difficulty of the reflective cup lens and improves production efficiency.
[0030] like Figure 4 and Figure 5As shown, this invention provides toothed ridges 300 on the surface of the sidewall 210 of the reflective part 200, giving the surface of the sidewall 210 toothed stripes. When light rays with a large deflection angle inside the reflective cup lens strike the toothed ridges 300, the toothed ridges 300 can reflect these rays back, achieving an effect similar to that of an electroplated reflector. This invention also limits the range of the tip angle of the toothed ridges 300. According to Snell's law of refraction, to achieve total internal reflection, the tip angle range of the toothed ridges 300 is limited to 75–95°. Furthermore, as... Figure 6 and Figure 7 As shown, the larger the tip angle of the toothed ridge 300, the smaller the angle of change of the small portion of projected light, making it easier for it to enter the user's eye. Therefore, the transparency of the reflector lens is better when viewed by the user. Conversely, the smaller the tip angle of the toothed ridge 300, the larger the angle of change of the small portion of projected light, making it more difficult for it to enter the user's eye. The transparency of the reflector lens is relatively poor. When the transparency of the reflector lens is poor, it can block light from the internal structure of the lamp, presenting a more crystal-clear aesthetic to the user. Therefore, the poor transparency of the reflector lens is more acceptable to users. Thus, this invention further narrows the tip angle range of the toothed ridge 300. The preferred embodiment limits the tip angle range of the toothed ridge 300 to 75°.
[0031] Specifically, such as Figure 2 and Figure 8 As shown, the toothed protrusions 300 on the outer surface of the sidewall 210 of the reflector 200 in this invention have a segmented structure. Each toothed protrusion 300 is composed of multiple protrusion blocks 310 connected sequentially. The top of each protrusion block 310 is an arc shape curving upwards from the middle to both ends. Adjacent protrusion blocks 310 are not directly connected but are connected by a transition plane 320, forming a stepped structure at the connection point. Through this structural improvement, the surface of the toothed protrusions 300 presents a multi-segment discontinuous arc structure. Each arc structure is connected by a transition plane 320, making each arc completely independent. This results in greater freedom of movement for each segmented arc, more precise angle control, and easier achievement of precise light distribution design.
[0032] like Figure 1As shown, this invention provides multiple triangular pyramidal grooves 240 on the inner side of the light inlet 220. Each triangular pyramidal groove 240 extends axially from the opening of the light inlet 220 to connect with the light-incident surface 110 of the lens section 100. The multiple pyramidal grooves 240 are continuously arranged in a ring array on the inner side of the light inlet 220. One end of the triangular pyramidal groove 240 at the opening of the light inlet 220 is a cone tip. This cone tip makes point contact with the bottom of the reflector section 200, so it will not affect the shape of the light inlet 220, and the light inlet 220 remains circular, which is convenient for processing and shaping using a mold. The end of the triangular pyramidal groove 240 that connects with the light-incident surface 110 of the lens section 100 forms a sawtooth-shaped microstructure, which facilitates light mixing. After the light emitted by the light source enters the light inlet 220, the incident light is first mixed at the triangular pyramidal groove 240 on the inner side of the light inlet 220, and then mixed a second time at the toothed protrusion 300 on the side wall 210 of the reflector 200. After two light mixings, the annular or radial streaks on the light spot can be basically eliminated, effectively improving the light mixing effect.
Claims
1. A reflective cup lens, comprising a lens portion (100) and a reflective portion (200), the reflective portion (200) having an annular sidewall (210) and a light entrance (220) and a light exit (230) formed by the sidewall (210), the lens portion (100) being disposed at the center of the light entrance (220), the side of the lens portion (100) near the light entrance (220) being a light entrance surface (110), and the side of the lens portion (100) near the light exit (230) being a light exit surface (120), characterized in that: The outer side of the sidewall (210) is provided with a plurality of toothed protrusions (300) arranged in a ring. The toothed protrusions (300) extend from the light inlet (220) to the light outlet (230). The cross-section of the toothed protrusions (300) is triangular and the included angle of the tip is in the range of 75 to 95°. The toothed protrusions (300) extend in an arc on the outer side of the sidewall (210).
2. The reflective cup lens as described in claim 1, characterized in that: The radial angle between the starting point and the ending point of the toothed protrusion (300) is ≤15°.
3. The reflective cup lens as described in claim 1, characterized in that: The toothed ridge (300) is a multi-segment structure composed of multiple ridge blocks (310) connected in sequence. The top of the ridge block (310) is an arc shape that curves upward from the middle to both ends. Adjacent ridge blocks (310) are connected by a transition plane (320) and form a step structure at the connection.
4. The reflective cup lens as described in claim 1, characterized in that: The inner side of the light inlet (220) is provided with a plurality of triangular pyramidal grooves (240). The triangular pyramidal grooves (240) extend axially from the opening of the light inlet (220) to connect with the light-incident surface (110) of the lens part (100). One end of the triangular pyramidal groove (240) at the opening of the light inlet (220) is a cone tip. The plurality of triangular pyramidal grooves (240) are arranged in a ring on the inner side of the light inlet (220).
5. The reflective cup lens as described in claim 4, characterized in that: The end of the triangular pyramidal groove (240) that connects to the light-incident surface (110) of the lens part (100) has a sawtooth-shaped microstructure.
6. The reflective cup lens as described in claim 1, characterized in that: The light-incident surface (110) and the light-exit surface (120) of the lens section (100) are both concave arc surfaces facing the light-exit port (230), and the curvature of the light-incident surface (110) is smaller than that of the light-exit surface (120).
7. The reflective cup lens as described in claim 1, characterized in that: The lens part (100) and the reflective part (200) are an integral structure.
8. The reflective cup lens as described in claim 1, characterized in that: The included angle of the tip of the toothed rib (300) ranges from 75° to 85°.
9. The reflective cup lens as described in claim 1, characterized in that: The light-emitting surface (120) of the lens (100) is covered with an array of beaded microstructures.