Optical element and luminaire

Abstract

This invention provides an optical element and a lamp. The optical element includes a light-incident section, a light-emitting section, and a reflector. The light-emitting section is arranged opposite to the light-incident section. The reflector connects the light-incident section and the light-emitting section, and together with the light-incident section and the light-emitting section, forms a mixing cavity. The reflector has a reflective surface. The interface between the reflector and the light-emitting section is inclined. After light enters the mixing cavity from the light-incident section and is mixed, part of the light exits from the light-emitting section, and the other part is reflected by the reflector to the interface and then enters the light-emitting section before exiting. Compared with the prior art, the optical element of this invention not only effectively improves optical efficiency and light color consistency, but also makes the assembly and maintenance of the lamp more convenient.

Description

Technical Field

[0001] This utility model relates to an optical element and a lamp, belonging to the field of lighting technology. Background Technology

[0002] In most linear lights currently on the market, if the light emitted from the LED can directly reach the optical element, it can emit light smoothly. However, if the light from the LED first reaches the outer casing, it will be limited by the color of the casing, absorbing some light energy or changing the light color, leading to a decrease in luminous efficiency and causing color variations. Furthermore, when the light is emitted near vertically to the optical element, the edge of the light-emitting surface of the optical element also suffers from low brightness.

[0003] Furthermore, because linear lights are relatively narrow, there is not enough space to add screws or other components to install and fix the optical light-transmitting elements. Adding components would not only increase costs but also make it difficult to quickly assemble and repair linear lights.

[0004] In view of this, it is indeed necessary to improve the existing optical components and linear lights to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an optical element that not only improves optical efficiency and light color consistency, but also makes the assembly and maintenance of lamps more convenient.

[0006] To achieve the above objectives, this utility model provides an optical element, comprising:

[0007] light entrance part;

[0008] The light-emitting section is positioned opposite to the light-receiving section;

[0009] A reflective section connects the light-inlet section and the light-outlet section, and defines a light-mixing cavity with the light-inlet section and the light-outlet section. The reflective section is provided with a reflective surface.

[0010] The interface between the reflector and the emitter is an inclined plane. After the light enters the mixing cavity from the light inlet and is mixed, part of the light is emitted from the emitter, and the other part is reflected by the reflector to the interface and enters the emitter before being emitted from the emitter.

[0011] Optionally, the light-emitting part includes an incident surface and a light-emitting surface disposed opposite to each other, and a connecting part extending toward the reflector is formed on one side of the incident surface of the light-emitting part, and the connecting interface is located between the connecting part and the reflector.

[0012] Optionally, the incident surface is provided with microstructures to receive light rays incident from the mixing cavity and adjust the emission direction of the light rays.

[0013] Optionally, the outer spacing of the reflective part gradually increases from the light-incident part toward the light-exiting part, and the light mixing cavity gradually increases from the light-incident part toward the light-exiting part.

[0014] Optionally, the light-emitting part is made of a light-transmitting material, and the reflective part is made of a high-reflectivity material.

[0015] Optionally, the reflective part and the light-emitting part can be integrally molded from different materials.

[0016] Optionally, the light-incident portion is a convex lens that protrudes toward the light-outceasing portion.

[0017] Another objective of this invention is to provide a lamp with the aforementioned optical elements, which has a simple structure and is easy to assemble and maintain.

[0018] To achieve the above objectives, this utility model provides a lamp, comprising:

[0019] The housing has a receiving space and a light outlet communicating with the receiving space;

[0020] The light source assembly is located within the containment space and away from the light outlet;

[0021] The aforementioned optical element is located within the housing space and is snapped and fixed to the side wall of the housing;

[0022] The optical element is located on the light-emitting side of the light source assembly and is in close contact with the light source assembly. The light-emitting part of the optical element is exposed at the light-emitting port.

[0023] Optionally, the housing includes two fixed walls arranged opposite each other and a connecting wall connecting the two fixed walls. Each fixed wall has a positioning part on its inner side wall and a corresponding mating part on the outer side of the reflector. The optical element is squeezed into the receiving space from the light outlet. The mating part and the positioning part cooperate with each other to fix the optical element in the housing. The light source assembly is in close contact with the connecting wall.

[0024] Optionally, the light-emitting part is provided with abutting parts on opposite sides, and the inner side wall of the fixed wall is provided with abutting surface. The abutting parts abut against the abutting surface, so that the light-emitting part is tightly connected to the housing.

[0025] The beneficial effects of this invention are as follows: The optical element of this invention, by setting opposing light-incident and light-exit sections and a reflective section connecting them, and with the interface between the reflective and light-exit sections being an inclined plane, allows light to enter the mixing cavity from the light-incident section for mixing. Part of the light then exits directly from the light-exit section, while the other part is reflected by the reflective surface to the interface, enters the light-exit section from the interface, and exits from the light-exit section. Compared to existing technologies, the optical element of this invention not only improves optical efficiency and light color consistency but also makes the assembly and maintenance of lamps more convenient. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the lamp of this utility model.

[0027] Figure 2 yes Figure 1 A schematic diagram of the first embodiment of the optical element.

[0028] Figure 3 yes Figure 1 A schematic diagram of a second embodiment of the optical element.

[0029] Figure 4 yes Figure 1 A schematic diagram of the third embodiment of the optical element.

[0030] Figure 5 yes Figure 3 A schematic diagram of the internal light path of an optical element.

[0031] Figure label:

[0032] 100 - Lighting fixtures;

[0033] 1-Housing shell; 10-Reception space; 11-Light outlet; 12-Fixing wall; 121-Positioning part; 122-Abutting surface; 123-Guiding part; 13-Connecting wall;

[0034] 2-Light source assembly; 21-Substrate; 22-LED chip;

[0035] 3-Optical element; 31-Incident light section; 32-Outcrow light section; 321-Abutting part; 322-Relief groove; 323-Incident surface; 324-Outcrow light surface; 325-Connecting part; 326-Microstructure; 33-Reflecting part; 330-Mixing cavity; 331-Matching part; 332-Reflecting surface; 34-Connecting interface. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Please see Figure 1 As shown, this utility model discloses a lamp 100, including a housing 1, a light source assembly 2 located inside the housing 1, and an optical element 3 that is connected and cooperates with the light source assembly 2 and the housing 1. The optical element 3 can not only improve the optical efficiency of the lamp 100 and enhance the color uniformity of the light, but also make the lamp 100 simpler and more convenient to assemble and maintain.

[0038] like Figures 2-5As shown, the housing 1 has a receiving space 10 and a light-emitting port 11 communicating with the receiving space 10. In this embodiment, the lamp 100 is a linear lamp, and both the receiving space 10 and the light-emitting port 11 extend along the longitudinal direction of the housing 1. The light source assembly 2 is located within the receiving space 10 and away from the light-emitting port 11. The optical element 3 is located within the receiving space 10 and on the light-emitting side of the light source assembly 2, with part of the optical element 3 exposed to the light-emitting port 11, so that the light emitted by the light source assembly 2 can be emitted from the light-emitting port 11 after passing through the optical element 3. Preferably, both the light source assembly 2 and the optical element 3 extend along the extending direction of the receiving space 10.

[0039] Optionally, the luminaire 100 also includes end caps (not shown) located at both ends of the housing 1. The end caps can maintain the integrity of the luminaire 100 by limiting and shielding the light source assembly 2 and the optical element 3 within the housing space 10, and can also block part of the light emitted by the light source assembly 2.

[0040] Of course, in other alternative embodiments, the lamp 100 can also be a ring-shaped lamp. In this case, the receiving space 10 is arranged in a ring shape, and the light source assembly 2 and the optical element 3 are located within the receiving space 10, also arranged in a ring shape. That is to say, the present invention does not limit the specific shape of the lamp 100, as long as it can meet the requirements for the installation of the light source assembly 2 and the optical element 3.

[0041] The optical element 3 is snapped and fixed to the side wall of the housing 1 and is in close contact with the light source assembly 2. The optical element 3 includes a light-incident section 31, a light-emitting section 32 disposed opposite to the light-incident section 31, and a reflector section 33 connecting the light-incident section 31 and the light-emitting section 32. The light-emitting section 32 is exposed at the light-emitting port 11. There are two reflectors 33 disposed opposite to each other, and the distance between the outer sides of the two reflectors 33 gradually increases from the light-incident section 31 toward the light-emitting section 32.

[0042] In this embodiment, the two reflective parts 33 are symmetrically arranged. Of course, the two reflective parts 33 can also be arranged asymmetrically according to the actual situation, and there is no limitation on this.

[0043] Specifically, the housing 1 is U-shaped and includes two opposing fixed walls 12 and a connecting wall 13 connecting the two fixed walls 12. The light outlet 11 is formed between the two fixed walls 12 and is located away from the connecting wall 13. Optionally, the distance between the two fixed walls 12 is approximately 15 mm; the distance from the free end of the fixed wall 12 to the connecting wall 13 is approximately 17 mm, that is, the height of the fixed wall 12 is approximately 17 mm. Of course, it is understood that the shape and size of the housing 1 should not be limited to these specifications.

[0044] Each fixed wall 12 has a positioning part 121 on its inner sidewall, and a corresponding mating part 331 on the outer side of the reflector 33. The mating part 331 is preferably located at the end of the reflector 33 near the light-emitting part 32. The optical element 3 is pressed into the receiving space 10 from the light-emitting port 11 until the mating part 331 and the positioning part 121 engage, fixing the optical element 3 inside the housing 1, with the light source assembly 2 tightly attached to the connecting wall 13. In other words, when the lamp 100 is narrow, the optical element 3 is flexible, allowing it to be directly pressed into the receiving space 10 from the light-emitting port 11 to fix the optical element 3 and the light source assembly 2 without additional operation. Thus, the lamp 100 has a simple structure and is easy to assemble and maintain. Of course, in other alternative embodiments, the optical element 3 can also be made into a straight line, a wave shape, or a ring shape according to actual needs, as long as it can be fixedly installed with the housing 1.

[0045] The light-emitting part 32 has abutment parts 321 on opposite sides, and the inner sidewall of the fixing wall 12 has abutment surfaces 122. The abutment parts 321 abut against the abutment surfaces 122, so that the light-emitting part 32 is tightly connected to the housing 1. Preferably, a guide part 123 is also formed between the positioning part 121 and the abutment surface 122, and a relief groove 322 for accommodating the guide part 123 is formed between the mating part 331 and the abutment part 321. The relief groove 322 is formed on the outer wall surface of the light-emitting part 32. In this way, the guide part 123 can be accommodated in the relief groove 322 to achieve further connection between the light-emitting part 32 and the housing 1.

[0046] The guide portion 123 extends gradually from the contact surface 122 to the positioning portion 121 toward the interior of the receiving space 10 and forms a guide slope (not labeled). Under the action of the guide slope, the mating portion 331 passes over the guide portion 123 and enters the positioning portion 121. At this time, the guide portion 123 extends into the clearance groove 322, and the contact portion 321 abuts against the contact surface 122.

[0047] In this embodiment, the positioning part 121 is a groove provided on the inner sidewall of the two fixed walls 12, and the mating part 331 is a protrusion provided on the outer side of the two reflective parts 33. The optical element 3 and the light source assembly 2 are fixed by the mating of the protrusion and the groove. Of course, in other optional embodiments, the positioning part 121 can also be a protrusion provided on the inner sidewall of the two fixed walls 12, and the mating part 331 can be a groove provided on the outer side of the two reflective parts 33, as long as the optical element 3 and the housing 1 can be fixedly installed, there is no limitation. In this case, the guiding part 123 is provided between the mating part 331 and the abutting part 321, and the clearance groove 322 is correspondingly provided between the positioning part 121 and the abutting surface 122.

[0048] The light-emitting section 32 includes an incident surface 323 and a light-emitting surface 324 disposed opposite to each other. The reflector section 33, together with the incident surface 31 and the light-emitting section 32, defines a light-mixing cavity 330. Optionally, the light-mixing cavity 330 gradually increases in size from the incident surface 31 toward the light-emitting section 32. The reflector section 33 is provided with a reflective surface 332, and both the incident surface 323 and the reflective surface 332 are disposed toward the light-mixing cavity 330.

[0049] like Figure 5 As shown, the reflector 33 and the emitter 32 are integrally formed from different materials, and the connection interface 34 between the reflector 33 and the emitter 32 is an inclined surface. Thus, the light emitted from the light source assembly 2 enters the mixing cavity 330 from the light incident section 31 for mixing. Part of the light enters the interior of the emitter 32 from the incident surface 323 and finally exits from the emitter surface 324; the other part is reflected by the reflector 332 to the connection interface 34, enters the interior of the emitter 32 from the connection interface 34, and finally exits from the emitter surface 324. The part of the light entering the interior of the emitter 32 from the incident surface 323 is further divided into light directly incident from the light source assembly 2 to the incident surface 323 and light emitted from the light source assembly 2 and reflected by the reflector 332 to the incident surface 323.

[0050] In this embodiment, to reduce optical loss and improve optical efficiency, the light-emitting part 32 is made of a light-transmitting material with added light diffusing agent, and the reflective part 33 is made of a high-reflectivity opaque material. Both are preferably made of silicone, and the reflective part 33 is porcelain white. The porcelain white silicone reflective part 33 not only reflects light, reducing optical loss and improving optical efficiency, but also reduces the influence of the inner wall color of the housing 1 on the emitted light color, improving light color consistency. Preferably, the smaller the width of the light-emitting surface 324 and the larger the depth of the light-mixing cavity 330, the more obvious the light color effect.

[0051] like Figure 3 As shown, a connecting portion 325 extending toward the reflector 33 is formed on one side of the incident surface 323 of the light-emitting section 32, and a connecting interface 34 is located between the connecting portion 325 and the reflector 33. The connecting interface 34 is set as an inclined surface, which not only increases the connection area between the light-emitting section 32 and the reflector 33, but also reduces the optical loss at the connecting interface 34, allowing more light to be emitted from the light-emitting surface 324. In other words, the inclined surface of the connecting interface 34 can improve the problem of low brightness at the edge of the light-emitting surface 324 when the light is emitted in a near-vertical direction. The incident surface 323 is provided with a microstructure 326 to receive the light emitted from the mixing cavity 330 and adjust the emission direction of the light. Preferably, there are two connecting portions 325, which are located at both ends of the light-emitting section 32. The microstructure 326 is located between the two connecting portions 325, and preferably consists of several uniformly arranged protrusions, thereby making the light emitted from the light-emitting surface 324 more uniform.

[0052] The light source assembly 2 includes a substrate 21 and lamp beads 22 evenly arranged on the substrate 21. The side of the substrate 21 facing away from the lamp beads 22 abuts against the connecting wall 13.

[0053] like Figure 2 As shown, in the first embodiment of this utility model, the light-incident portion 31 is an opening located at one end of the reflector portion 33. After the optical element 3 is squeezed into the receiving space 10 from the light-outlet 11, one end of the reflector portion 33 abuts against the substrate 21 and is distributed on both sides of the lamp bead 22 to fix the light source assembly 2 within the receiving space 10. In this embodiment, the reflectivity of the inner wall of the housing 1 is approximately 40%, and the reflectivity of the reflector portion 33 is approximately 82%. By providing the reflector portion 33, the luminous efficiency can reach 42.3 lumens / watt, thereby improving the optical efficiency of the lamp 100 by approximately 70%.

[0054] like Figure 3 As shown, in the second embodiment of this invention, both the light-emitting part 32 and the light-entry part 31 are planar lenses. The light-entry part 31 is preferably made of a highly transparent material. After the optical element 3 is squeezed into the receiving space 10 from the light-emitting port 11, the side of the light-entry part 31 facing away from the light-emitting part 32 is in close contact with the lamp bead 22 to fix the light source assembly 2 in the receiving space 10. The reflector 33 is integrally formed on the outside of the light-entry part 31, and the end face of the reflector 33 away from the light-emitting part 32 is flush with the side face of the light-entry part 31 facing the lamp bead 22. In this embodiment, the luminous efficiency can reach 37.2 lumens / watt, and compared with not providing the reflector 33, the optical efficiency of the lamp 100 is improved by approximately 50%.

[0055] like Figure 4 As shown, in the third embodiment of this utility model, compared to the second embodiment, the light-emitting part 32 is a plane lens, and the light-incident part 31 is a convex lens that protrudes towards the light-emitting part 32. The light-incident part 31 can converge the light emitted by the lamp bead 22, so that more light can be directly emitted to the light-emitting part 32, which can further improve the light efficiency.

[0056] In summary, the optical element 3 of this invention, by providing opposing light-incident sections 31 and 32, and a reflector 33 connecting the light-incident section 31 and 32, and with the connecting interface 34 between the reflector 33 and 32 being an inclined surface, allows light to enter the mixing cavity 330 from the light-incident section 31 for mixing. Part of the light is directly emitted from the 32, while the other part is reflected by the reflector 332 to the connecting interface 34, enters the 32, and is emitted from the 32. Compared to existing technologies, the optical element 3 of this invention not only improves optical efficiency and light color consistency, but the integrated design of the reflector 33 and 32 also makes the assembly and maintenance of the lamp 100 more convenient.

[0057] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. An optical element, characterized in that, include: Light entrance part(31); The light-emitting section (32) is disposed opposite to the light-entering section (31); A reflective part (33) connects the light-incident part (31) and the light-exiting part (32), and defines a light mixing cavity (330) with the light-incident part (31) and the light-exiting part (32). The reflective part (33) is provided with a reflective surface (332). The connection interface (34) between the reflective part (33) and the light-emitting part (32) is an inclined surface. After the light enters the light mixing cavity (330) from the light-inlet part (31) and is mixed, part of the light is emitted from the light-emitting part (32), and the other part is reflected by the reflective surface (332) to the connection interface (34) and enters the light-emitting part (32) before being emitted from the light-emitting part (32).

2. The optical element according to claim 1, characterized in that: The light-emitting part (32) includes an incident surface (323) and a light-emitting surface (324) arranged opposite to each other. A connecting part (325) extending toward the reflective part (33) is formed on one side of the incident surface (323) of the light-emitting part (32). The connecting interface (34) is located between the connecting part (325) and the reflective part (33).

3. The optical element according to claim 2, characterized in that: The incident surface (323) is provided with microstructures (326) to receive light rays incident from the mixing cavity (330) and adjust the emission direction of the light rays.

4. The optical element according to claim 1, characterized in that: The outer spacing of the reflective part (33) gradually increases from the light-incident part (31) toward the light-emitting part (32), and the light mixing cavity (330) gradually increases from the light-incident part (31) toward the light-emitting part (32).

5. The optical element according to claim 1, characterized in that: The light-emitting part (32) is made of a light-transmitting material, and the reflective part (33) is made of a high-reflectivity material.

6. The optical element according to claim 1, characterized in that: The reflective part (33) and the light-emitting part (32) are integrally formed from different materials.

7. The optical element according to claim 1, characterized in that: The light-incident part (31) is a convex lens that protrudes toward the light-outceasing part (32).

8. A lamp, characterized in that, include: The housing (1) is provided with a receiving space (10) and a light outlet (11) communicating with the receiving space (10); The light source assembly (2) is located within the containment space (10) and away from the light outlet (11); The optical element (3) as described in any one of claims 1-7 is located within the receiving space (10) and is snapped and fixed to the side wall of the housing (1); The optical element (3) is located on the light-emitting side of the light source assembly (2) and is in close contact with the light source assembly (2). The light-emitting part (32) of the optical element (3) is exposed to the light-emitting port (11).

9. The lamp according to claim 8, characterized in that: The housing (1) includes two opposing fixed walls (12) and a connecting wall (13) connecting the two fixed walls (12). Each fixed wall (12) has a positioning part (121) on its inner sidewall and a corresponding mating part (331) on the outer side of the reflective part (33). The optical element (3) is squeezed into the receiving space (10) from the light outlet (11). The mating part (331) and the positioning part (121) cooperate with each other to fix the optical element (3) in the housing (1). The light source assembly (2) is in close contact with the connecting wall (13).

10. The lamp according to claim 9, characterized in that: The light-emitting part (32) has abutment parts (321) on opposite sides, and the inner sidewall of the fixed wall (12) has abutment surface (122) corresponding to it. The abutment part (321) abuts against the abutment surface (122), so that the light-emitting part (32) is tightly connected to the housing (1).

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