CN219867575U - Blue sky panel lamp - Google Patents

Abstract

The utility model belongs to the technical field of lighting equipment, and particularly relates to a blue sky panel lamp. The blue sky panel light includes: a light guide component; a light source component for projecting light to the light guide component; and a diffusion component including a one-way panel arranged relative to the light guide component and having a predetermined thickness, and a unidirectional panel located between the one-way panel and the light guide component. The one-way panel has a light exit surface facing away from the diffusion film. The one-way panel allows light to exit the one-way panel from the light exit surface, and the one-way panel restricts external light from entering the one-way panel from the light exit surface. The utility model can prevent the user from seeing the internal structural components of the blue sky panel light through the one-way panel, and can only see the sky scene simulated and presented by the one-way panel, giving people the feeling of being under the sun on a sunny day, thus enhancing their awareness of the sky. simulation effect.

Description

Blue sky panel lamp

Technical Field

The utility model belongs to the technical field of lighting equipment, and particularly relates to a blue sky panel lamp.

Background

Along with the continuous expansion of solar energy utilization of people at present, the technology of simulating sunlight is also continuously developed, so that the technology is used for meeting the condition of partial illumination shortage or no illumination, is used for simulating a light source of sunlight, and can be used in a plurality of fields, such as the field of space technology, solar photovoltaic science and engineering, remote sensing technology or simulating indoor illumination environment. In these places, the properties of the simulated solar spectrum illumination can be utilized. And the lighting demands of people on houses and public places are also increasing, and the lighting device is required to generate good lighting effects so as to meet different lighting demands.

When natural light is scattered through the atmosphere, blue light is scattered throughout the sky, forming warm yellow light in blue sky and dusk. In order to achieve a realistic natural sunlight irradiation effect, a commercially available blue sky light or a sun light needs to be designed by an optical system.

However, some side-emitting blue sky lights or sky lights have distortion problems when presenting real sunlight effect, only one luminous flat plate can be presented, and a user can see structural members in the blue sky lights, so that layering sense and deep sense of sky are lacked, great difference exists between the sky lights and actual natural illumination, and the structural members cannot be hidden to make sky simulation unreal.

Disclosure of Invention

The embodiment of the utility model aims to provide a blue sky panel lamp, which aims to solve the problem of how to provide illumination and improve the simulation effect of natural sky.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

provided is a blue sky panel lamp including:

a light guide assembly;

the light source component is used for projecting light rays to the light guide component; and

the diffusion assembly comprises a one-way panel and a diffusion film, wherein the one-way panel is arranged opposite to the light guide assembly and has a preset thickness, the diffusion film is arranged between the one-way panel and the light guide assembly, the one-way panel is provided with a light emitting surface opposite to the diffusion film, the one-way panel allows the light to emit out of the one-way panel from the light emitting surface, and the one-way panel limits the external light to enter the one-way panel from the light emitting surface.

In some embodiments, the unidirectional panel includes a transparent bottom plate made of a transparent material and disposed opposite to the light guide assembly, and a unidirectional film layer disposed on the transparent bottom plate, the light emitting surface is located on the unidirectional film layer, and a reflectivity of the unidirectional film layer to light is greater than a transmittance of the unidirectional film layer to light.

In some embodiments, the transparent base plate has a thickness in the range of 0.3 to 6mm; and/or the thickness of the unidirectional film layer ranges from 5nm to 10nm.

In some embodiments, the blue sky panel lamp further includes a bezel disposed opposite the light exit surface and configured to secure the diffusion assembly and the light guide assembly; the light-emitting surface is arranged in a mirror surface mode, so that the surface frame is at least partially imaged on the light-emitting surface.

In some embodiments, the light source assembly includes a surface light source disposed opposite the light guide assembly and configured to project light toward a plate surface of the light guide assembly, and a side light source disposed at one side of the light guide assembly and configured to project light toward a side plate surface of the light guide assembly.

In some embodiments, the blue sky panel lamp further includes a light shield made of a light blocking material and having a containing cavity, the surface light source is located in the containing cavity, and the light shield is provided with a light hole communicated with the containing cavity, so that light emitted by the surface light source irradiates to the light guide assembly through the light hole.

In some embodiments, the light-transmitting holes are circular, semi-circular, or crescent-shaped in shape.

In some embodiments, the light guide assembly includes a light guide panel, a diffusion sheet disposed on the light shield and covering the surface light source, and a reflective paper disposed between the light shield and the light guide panel, where the reflective paper has an avoidance hole corresponding to the position of the surface light source.

In some embodiments, the side light source comprises a lamp panel, a lamp bead arranged on the lamp panel and a protective lampshade connected with the lamp panel, wherein the protective lampshade is made of a light-transmitting material and the lamp bead is positioned in the protective lampshade.

In some embodiments, the blue sky panel lamp further comprises a buffer block made of an elastic material, the buffer block is provided with a positioning groove, and edges of the light guide assembly and the diffusion assembly are located in the positioning groove.

The utility model has the beneficial effects that: the blue sky panel lamp comprises a light source assembly, a light guide assembly and a diffusion assembly, wherein the diffusion assembly comprises a one-way panel and a diffusion film, the diffusion film is attached to one side surface of the one-way panel, the one-way panel and the diffusion film are combined, a diffusion plate is arranged on the other side surface of the one-way panel, a light emergent surface is arranged on the other side surface of the one-way panel, the light source assembly projects light towards the light guide assembly in a conductive state, the one-way panel isolates the diffusion film from an external space, and the one-way panel has a preset thickness, so that a sense of space, a profound sense and a layering sense are formed, and a real effect of sun illumination is presented and simulated when illumination is performed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or exemplary technical descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic structural diagram of a blue sky panel lamp according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of A-A of the blue sky panel lamp of FIG. 1;

FIG. 3 is a schematic cross-sectional view of B-B of the blue sky panel lamp of FIG. 1;

fig. 4 is a schematic structural diagram of a surface light source of a blue sky panel lamp according to another embodiment of the present utility model;

fig. 5 is an exploded view of a blue sky panel lamp according to another embodiment of the present utility model.

Wherein, each reference sign in the figure:

100. blue sky panel lamps; 101. a panel; 200. a face frame; 102. a diffusion film; 103. a diffusion assembly; 500. a light guide assembly; 501. a light guide plate; 502. reflection paper; 503. a diffusion sheet; 300. a back plate; 201. a placement cavity; 400. a light source assembly; 404. a side light source; 401. a lamp panel; 402. a lamp bead; 403. a protective lampshade; 1011. a light-emitting surface; 110. a buffer block; 405. a surface light source; 601. a light shield; 602. a light hole; 603. a receiving chamber; 4031. a protective groove;

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. are based on the orientation or positional relationship shown in the drawings, are for convenience of description only, and are not intended to indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model, and the specific meaning of the terms described above will be understood by those of ordinary skill in the art as appropriate. The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.

Referring to fig. 1 to 3, a blue sky panel lamp 100 is provided, and the blue sky panel lamp 100 may be installed on a ceiling and projects light downward. Alternatively, mounting holes may be formed in the ceiling, the blue sky panel lamp 100 may be partially received in the mounting holes and connected to the ceiling by a connector, or the blue sky panel lamp 100 may be positioned and mounted to the ceiling directly by the connector. It will be appreciated that the connector may be a bolt or a magnetic structure, and is not limited herein, and may be selected according to the actual situation.

Referring to fig. 1 to 3, the light source module 400 includes a light guide module 500, a light source module 400, and a diffusion module 103, wherein the light source module 400 is used for projecting light to the light guide module 500; the light guide assembly 500 has a plate shape and may be connected to the ceiling by a structural member, and the light guide assembly 500 is disposed parallel to the ceiling. The light guide assembly 500 can diffuse the light projected thereon to various angles and uniformly emit the light. The diffusion component 103 comprises a unidirectional panel 101 which is arranged opposite to the light guide component 500 and has a preset thickness, and a diffusion film 102 which is arranged between the unidirectional panel 101 and the light guide component 500, wherein the unidirectional panel 101 is provided with a light-emitting surface 1011 which is opposite to the diffusion film 102, and the unidirectional panel 101 allows light rays of the light guide component 500 to be emitted out of the unidirectional panel 101 from the light-emitting surface 1011, so that illumination and a scene simulating a sky can be provided. The unidirectional panel 101 limits external light from the light-emitting surface 1011 to enter the unidirectional panel 101, so that a user can be prevented from seeing structural components inside the blue sky panel lamp 100 through the unidirectional panel 101, and only a sky scene simulated and represented by the unidirectional panel 101 can be seen, thereby enhancing a sky simulation effect.

The diffusion film 102 is located between the unidirectional panel 101 and the light guide assembly 500, the unidirectional panel 101 has a predetermined thickness and has a light exit surface 1011 facing away from the diffusion film 102, the light emitting assembly projects light toward the light guide assembly 500, and the light exits the unidirectional panel 101 from the light exit surface 1011. The diffusion film 102 mainly diffuses the light of the light guide assembly 500, so that the linear light source or the point light source can be distributed into a uniform surface light source 405 to diffuse the light, i.e. the light can be scattered on the surface of the surface light source, and the light can be diffused softly and uniformly. The diffusion film 102 mainly serves to correct the diffusion angle, and increases the light radiation area, but decreases the light intensity per unit area, that is, reduces the luminance. After the light is diffused by the diffusion material, the light can become a 2-time light source with larger area, better uniformity and stable chromaticity.

Referring to fig. 1 to 3, the blue sky panel lamp 100 in the present embodiment includes a light source assembly 400, a light guide assembly 500 and a diffusion assembly 103, the diffusion assembly 103 includes a unidirectional panel 101 and a diffusion film 102, the diffusion film 102 is attached to one side surface of the unidirectional panel 101, and has a combination of the unidirectional panel 101 and the diffusion film 102 with a certain thickness, so as to have a diffusion plate function, the other side surface of the unidirectional panel 101 is provided with a light exit 1011, after the light source assembly 400 projects light toward the light guide assembly 500 in a conductive state, the unidirectional panel 101 isolates the diffusion film 102 from an external space, and the unidirectional panel 101 has a predetermined thickness, thereby forming a spatial sense, a deep sense and a layering sense, and presenting and simulating a real effect of sun illumination as if the sun is at a distance of a certain space, such as if the real sun is shining on the atmosphere, and simultaneously, the unidirectional panel 101 limits external light from entering the unidirectional panel 101 from the light exit 1011, so that a user can be prevented from viewing only the internal structural components of the blue sky panel lamp 100 through the unidirectional panel 101, thereby simulating and enhancing a sky scene effect.

In some embodiments, the unidirectional panel 101 includes a transparent substrate made of a transparent material and disposed opposite to the light guide assembly 500, and a unidirectional film disposed on the transparent substrate, where the light-emitting surface 1011 is located on the unidirectional film, and the reflectivity of the unidirectional film for light is greater than the transmittance of the unidirectional film for light, so that external light can be restricted from entering the transparent substrate from the light-emitting surface 1011.

Alternatively, the transparent material may be an inorganic material, and the inorganic material may be quartz glass. The transparent bottom plate can also be made of organic materials, the organic materials can be organic glass, the organic glass is a high-molecular transparent material, the chemical name of the organic glass is polymethyl methacrylate, and the organic glass is a high-molecular compound polymerized by methyl methacrylate.

The unidirectional film layer is simply referred to as unidirectional perspective, and a layer of very thin metal film such as tin, silver or aluminum is adopted on one side surface or two side surfaces of the transparent bottom plate by adopting a crystal plating process, so that the unidirectional film layer is formed, and the unidirectional film layer has higher smoothness by adopting the crystal plating process.

Referring to fig. 1-3, in some embodiments, the transparent base plate has a thickness in the range of 0.3-6 mm. Alternatively, the transparent base plate may have a thickness of 0.5mm, 1mm or 3mm. In this embodiment, the thickness of the transparent base plate is 3.5mm, and in other embodiments, the transparent base plate may be selected according to practical situations, which is not limited herein.

Referring to fig. 2-4, in some embodiments, the unidirectional film layer has a thickness ranging from 5nm to 10nm. When the thickness of the unidirectional film layer is increased, the reflectivity and the transmissivity of the unidirectional film layer can be changed, and the unidirectional perspective effect is realized by utilizing the reflectivity higher than the transmissivity, namely the film thickness of the unidirectional film layer is larger than 5nm, such as 5.1nm, 5.5nm, 8nm and the like. However, in order to prevent the transmittance of the unidirectional film layer from being too low, the film thickness of the unidirectional film layer is preferably between 5 and 10nm. In this embodiment, the thickness of the unidirectional film layer is 6nm, and in other embodiments, the transparent substrate may be selected according to practical situations, which is not limited herein.

Referring to fig. 1 to 3, in some embodiments, the blue sky panel lamp 100 further includes a frame 200 disposed opposite to the light-emitting surface 1011 and used for fixing the diffusion component 103 and the light guide component 500; the light-emitting surface 1011 is disposed with a mirror surface, so that the frame 200 is at least partially imaged on the light-emitting surface 1011.

Referring to fig. 2 to 4, alternatively, the light-emitting surface 1011 of the mirror surface has a relatively low surface roughness, and presents a smooth imageable surface, so that an object can be imaged, even if the object forms a virtual image on the light-emitting surface 1011 under the action of light. The face frame 200 forms a reflection image of the inner frame face of the face frame 200 at the bright light-emitting face 1011, and can simulate the step reflection image of the skylight on the skylight glass, thereby creating the effect that natural illumination appears on a real skylight, and further improving the effect of simulating natural illumination.

Referring to fig. 2 to 4, in some embodiments, the light source assembly 400 includes a surface light source 405 disposed opposite to the light guide assembly 500 and used for projecting light to the plate surface of the light guide assembly 500, and a side light source 404 disposed at one side of the light guide assembly 500 and used for projecting light to the side plate surface of the light guide assembly 500. It can be appreciated that the surface light source 405 simulates and presents the effect of the sun or moon on the light guide assembly 500, and the side light source 404 simulates and presents the effect of the atmosphere on the light guide assembly 500, so that the real sky sunlight effect can be simulated by the surface light source 405 and the side light source 404.

Referring to fig. 2 to 4, in some embodiments, the blue sky panel lamp 100 further includes a light shield 601 made of a light blocking material and having a receiving cavity 603, the surface light source 405 is located in the receiving cavity 603, and the light shield 601 is provided with a light hole 602 communicating with the receiving cavity 603, so that light emitted from the surface light source 405 irradiates the light guide assembly 500 through the light hole 602.

Referring to fig. 2 to 4, alternatively, the surface light source 405 is a COB LED surface light source 405, or a plurality of 2835LED beads 402 or 3030LED beads 402 are arranged in an array to form a circular surface light source 405, and the light shielding cover 601 is used for shielding the excessive light in the disordered direction of the surface light source 405, so that the light of the surface light source 405 is only projected onto the light guide assembly 500 from the light hole 602.

Referring to fig. 2 to 4, alternatively, the light emitted from the surface light source 405 is in an original symmetric light distribution, in a lambertian distribution, the brightness at the center of the surface light source 405 is large, and the brightness around the surface light source is uniformly decreased, so as to better simulate the light emitting characteristics of the sun or moon.

In some embodiments, the shape of the light holes 602 is circular, semi-circular, or crescent-shaped, thereby simulating the shape of the sun, or simulating the shape of the moon at different times.

Referring to fig. 2 to fig. 4, in some embodiments, the light guide assembly 500 includes a light guide panel 101, a diffusion sheet 503 disposed on a light shield 601 and covering a light source 405, and a reflective paper 502 disposed between the light shield 601 and the light guide panel 101, wherein the reflective paper 502 has a dodging hole corresponding to a position of the light source 405.

The diffusion sheet 503 arranged above the surface light source 405 can soften the light of the surface light source 405 and can cover the LED beads 402 on the diffuse light source.

Referring to fig. 2 to 4, in some embodiments, the side light 404 includes a light panel 401, a light bead 402 disposed on the light panel 401, and a protective lampshade 403 connected to the light panel 401, wherein the protective lampshade 403 is made of a light-transmitting material, and the light bead 402 is located in the protective lampshade 403. The lamp beads 402 are disposed on the lamp plate 401 at intervals, and the lamp beads 402 are used for projecting light to the light guide plate 501. The protective lampshade 403 is in a strip shape, and each lamp bead 402 is located in the protective groove 4031 of the protective lampshade 403. It can be appreciated that the lamp bead 402 can be a blue LED lamp bead 402, and the unidirectional film layer has an obvious gain effect on blue light, so that the blue sky is more realistic and more realistic, the reflection sense is increased, the blue sky is more obvious, and the internal space is more profound.

Alternatively, two light panels 401 are arranged, and the light guide plate 501 is located between the two light panels 401.

Referring to fig. 2-4, in some embodiments, the light emitted by the side light 404 includes at least one of blue light, white light, or warm light. Optionally, the wavelength range of blue light is 400-500 nm; the color temperature range of the white light is 1800-2700K; the color temperature range of the warm light is 6000-8000K. The light emitted by the side light 404 may be any one of blue light, white light, or warm light, or a combination of any two lights, or a combination of three lights. It can be appreciated that the effect of natural illumination is related to the color of the light projected by the side light source 404, and when the light emitted by the side light source 404 is blue light, the blue sky illumination effect of deep blue sky can be simulated; when the light emitted by the side light source 404 is warm light, the illumination effect of sunrise or dusk sunset can be simulated; when the light emitted by the side light 404 is a mixture of blue light and cold light, the sky light effect of light blue of sky can be simulated.

Optionally, the protective cover is made of a transparent material with a certain strength, so as to provide protection for the lamp beads 402, and prevent the lamp beads 402 from being damaged due to impact of the light guide plate 501.

Referring to fig. 2 to 4, in some embodiments, the blue sky panel lamp 100 further includes a buffer block 110 made of an elastic material, the buffer block 110 is provided with a positioning groove, and edges of the light guide assembly 500 and the diffusion assembly 103 are located in the positioning groove. Alternatively, the elastic material may be rubber, and the light guide plate 501 and the transparent bottom plate may be heated to expand during the illumination process, and the buffer block 110 made of the elastic material may adapt to the expansion of the light guide assembly 500 and the diffusion assembly 103 through elastic deformation, so as to improve the reliability and stability of the blue sky panel lamp 100.

Referring to fig. 2 to 4, in some embodiments, the blue sky panel lamp 100 further includes a back plate 300, the back plate 300 is located at one side of the face frame 200 and forms a mounting cavity 201 together with the face frame 200, the mounting cavity 201 is located at a light outlet of the other side of the face frame 200, the light guide assembly 500, the light source assembly 400 and the diffusion assembly 103 are all located at the mounting cavity 201, and the light outlet 1011 is located at the light outlet. By the combination of the back plate 300 and the face frame 200, protection can be formed for the light guide assembly 500, the light emitting assembly, and the diffusion assembly 103, and the back plate 300 can be mounted to the ceiling, thereby realizing connection of the blue sky panel lamp 100 with the ceiling. Optionally, a light shield 601 is attached to the back plate 300 so that the surface light source 405 can be fixed.

Referring to fig. 3 to 5, alternatively, the face frame 200 is integrally formed with the back plate 300, and an inner edge of the face frame 200 abuts against the light-emitting surface 1011. The face frame 200 and the back plate 300 are made of plastic materials or aluminum alloys. The inner frame edge of the face frame 200 abuts against the light-emitting face 1011 and appropriately presses the diffusion component 103 toward the cavity bottom of the placement cavity 201, thereby maintaining the stability of the diffusion component 103, the light guide component 500 and the light emitting component.

Referring to fig. 3 to 5, in some embodiments, the blue sky panel lamp 100 further includes a cushion made of an elastic material, the cushion being located between a bottom of the installation cavity 201 and the light guide assembly 500. The assembly error between the light guide assembly 500 and the housing can be eliminated by the proper elastic deformation of the cushion pad, so that the light guide assembly 500 is pressed in the accommodating cavity 603.

When the light source assembly 400 is in the off state, the unidirectional film layer can reflect the strong light of the environment, so that the user can only see the light reflected by the environment, but the user can not see the structural member in the blue sky panel light 100, the structural member in the placement cavity 201 is better hidden, the unidirectional panel 101 presents a dark effect, and the beauty and the user experience are improved. When the light source module 400 is in the lighted state, the external light intensity is smaller than the light intensity in the installation cavity 201, and the user can see the scene simulating blue sky and sun.

The foregoing is merely an alternative embodiment of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the scope of the claims of the present utility model.

Claims (10)

1. A blue sky panel lamp, comprising:

a light guide assembly;

the light source component is used for projecting light rays to the light guide component; and

the diffusion assembly comprises a one-way panel and a diffusion film, wherein the one-way panel is arranged opposite to the light guide assembly and has a preset thickness, the diffusion film is positioned between the one-way panel and the light guide assembly, the one-way panel is provided with a light emitting surface opposite to the diffusion film, the one-way panel allows the light to emit out of the one-way panel from the light emitting surface, and the one-way panel limits the external light to enter the one-way panel from the light emitting surface _。

2. The blue sky panel lamp of claim 1, wherein: the unidirectional panel comprises a transparent bottom plate and a unidirectional film layer, wherein the transparent bottom plate is made of transparent materials and is arranged relative to the light guide assembly, the unidirectional film layer is arranged on the transparent bottom plate, the light emergent surface is positioned on the unidirectional film layer, and the reflectivity of the unidirectional film layer to light is larger than the transmissivity of the unidirectional film layer to light.

3. The blue sky panel lamp of claim 2, wherein: the thickness range of the transparent bottom plate is 0.3-6 mm; and/or the thickness of the unidirectional film layer ranges from 5nm to 10nm.

4. A blue sky panel lamp according to any one of claims 1 to 3, wherein: the blue sky panel lamp further comprises a surface frame which is arranged opposite to the light emitting surface and used for fixing the diffusion component and the light guide component; the light-emitting surface is arranged in a mirror surface mode, so that the surface frame is at least partially imaged on the light-emitting surface.

5. A blue sky panel lamp according to any one of claims 1 to 3, wherein: the light source assembly comprises a surface light source which is arranged opposite to the light guide assembly and used for projecting light rays to the plate surface of the light guide assembly, and a side light source which is positioned at one side of the light guide assembly and used for projecting light rays to the side plate surface of the light guide assembly.

6. The blue sky panel lamp of claim 5, wherein: the blue sky panel lamp further comprises a light shield which is made of light blocking materials and provided with a containing cavity, the surface light source is located in the containing cavity, and the light shield is provided with a light hole communicated with the containing cavity, so that light rays emitted by the surface light source pass through the light hole and irradiate to the light guide assembly.

7. The blue sky panel lamp of claim 6, wherein: the shape of the light hole is round, semicircular or crescent.

8. The blue sky panel lamp of claim 6, wherein: the light guide assembly comprises a light guide panel, a diffusion sheet arranged on the light shield and covering the surface light source, and reflection paper positioned between the light shield and the light guide panel, wherein the reflection paper is provided with an avoidance hole corresponding to the position of the surface light source.

9. The blue sky panel lamp of claim 5, wherein: the side light source comprises a lamp panel, lamp beads arranged on the lamp panel and a protective lampshade connected with the lamp panel, wherein the protective lampshade is made of a light-transmitting material and the lamp beads are positioned in the protective lampshade.

10. A blue sky panel lamp according to any one of claims 1 to 3, wherein: the blue sky panel lamp further comprises a buffer block made of elastic materials, the buffer block is provided with a positioning groove, and the edges of the light guide assembly and the diffusion assembly are located in the positioning groove.