Luminous bumper and preparation process thereof

Abstract

The invention relates to the technical field of automobile parts, in particular to a luminous bumper and a preparation process thereof. The light-emitting bumper comprises a mounting bracket, a bumper body and a decorative lamp, the mounting bracket comprises a bearing bracket and a lamp bracket, upper brackets are arranged on two sides of the bearing bracket, and the upper side of the lamp bracket is clamped on the upper brackets; the bumper body comprises end face covers located on the two sides, the end face covers are installed on the lamp supports, each end face cover is provided with a light-emitting area and a non-light-emitting area, the light-emitting areas are located on the outer sides of side collision areas of the bumper and avoid a front collision area and the side collision areas of the bumper, the light-emitting areas are provided with laser carving patterns, and the non-light-emitting areas are located on the outer sides of the side collision areas of the bumper. The laser etching pattern is formed by fitting a plurality of point holes; the decorative lamp is installed on the inner side of the end face cover. The arrangement of the light-emitting area of the bumper is optimized, the pedestrian protection safety is improved, the production cost is reduced, and the percent of pass is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive parts, and particularly to a light-emitting bumper and its manufacturing process. Background Art

[0002] A light-emitting bumper is an exterior automotive part that integrates lighting, signal indication, and decorative functions. It is mainly applied to the front or rear of a vehicle and achieves a light-emitting effect by combining an internal light source with a light-transmitting structure. Traditional light-emitting bumpers usually adopt the method of installing independent light sources (such as fog lights) by drilling holes in the skin. Its working principle is to guide the light to diffuse outward through light-transmitting through-holes or light-transmitting materials. With the development of automotive intelligence, light-emitting bumpers are gradually endowed with extended functions such as welcome interaction, charging status display, and music rhythm. However, the existing technologies have significant defects in terms of structural safety, process complexity, and cost control.

[0003] The prior art is an open-hole type light-emitting bumper. Its typical structure includes a bumper skin, a light-transmitting plugging trim piece, and a light-emitting component (such as 202210166520.4). Light-transmitting through-holes are drilled in the bumper skin. The light-transmitting plugging trim piece is located behind the skin, and the light-emitting component is arranged behind the trim piece. The light passes through the through-holes. Another type of solution (such as 202321978649.1) uses a lamp bracket to connect the bumper skin and the lamp housing, and multiple light-transmitting holes are drilled in the skin, and the light passes through the lamp shade. In addition, some technologies attempt to use conductive light-transmitting primer (such as 202410133392.2) to achieve light emission, but there are problems of high material cost and complex process. In the existing painting process, the laser engraving painting process uses sheet laser engraving to ensure the paint adhesion. It adopts secondary online spraying, with a low qualified rate and high cost. Especially, the products of secondary online and secondary baking are prone to deformation. At the same time, there is no secondary painting in the non-laser-engraved area, and the too thick paint film reduces the paint adhesion in the ordinary area instead. This contradiction is that on the one hand, the laser-engraved area needs to be thickened, while the non-laser-engraved area does not need it, making it difficult to mass-produce, and the process implementation is very difficult. Another type of solution (such as 202220374679.0) for light-emitting bumpers all adopts a bumper skin that is clamped and matched with the vehicle body frame; a light-emitting component, one side of which is connected to the bumper skin through a connecting component, and the other side is clamped and matched with the vehicle body frame; this installation structure is installed at the front end of the front anti-collision beam. From the perspective of the whole vehicle, because the structure behind the skin is very strong, it increases the safety risk of pedestrian protection. After an accident, due to its high stiffness and inability to absorb energy, it will cause great harm.

[0004] Therefore, the prior art has the following technical problems:

[0005] ① The bumper skin is clamped and matched with the vehicle body frame and installed at the front end of the front anti-collision beam. This structure, when the vehicle collides, due to its high stiffness, cannot effectively absorb energy, increasing the risk of serious injury to pedestrians.

[0006] ② The process of using conductive and light-transmissive primer is expensive and complex, making mass production impossible; the laser engraving and painting process requires secondary online spraying and baking, which not only increases production costs but also easily causes product deformation. At the same time, secondary painting in non-laser-engraved areas will make the paint film too thick, reducing the paint adhesion in ordinary areas and further affecting product quality and qualification rate. Summary of the Invention

[0007] Aiming at the deficiencies of the prior art, the purpose of the embodiments of the present invention is to provide a light-emitting bumper, optimize the layout of the light-emitting area of the bumper, avoid the decline of collision energy absorption ability, and improve the safety of pedestrian protection; adopt a light-shielding primer combined with a single laser engraving solution to eliminate the need for secondary spraying, reduce production costs and improve the qualification rate, and provide an intelligent light-emitting solution with both functionality and economy for automotive bumpers on the premise of ensuring safety and reliability.

[0008] To achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

[0009] A light-emitting bumper, comprising: a mounting bracket, a bumper body, and a decorative lamp; the mounting bracket includes a load-bearing bracket and a lamp bracket, both sides of the load-bearing bracket have upper brackets, and the upper side of the lamp bracket is clamped on the upper brackets; the bumper body includes end face masks on both sides, the end face masks are installed on the lamp bracket, the end face masks have a light-emitting area and a non-light-emitting area, the light-emitting area is located on the outer side of the side collision area of the bumper, avoiding the front collision area and the side collision area of the bumper, the light-emitting area has laser engraving patterns, and the laser engraving patterns are formed by fitting multiple point holes; the decorative lamp is installed on the inner side of the end face mask.

[0010] Optionally, a first load-bearing seat is provided at the top inside the lamp bracket, a first card slot and a second card slot are provided on the upper bracket, the second card slot is located above the first card slot, the first load-bearing seat is inserted into the first card slot, and the upper side of the end face mask is bent and embedded into the second card slot.

[0011] Optionally, a plurality of welding points are provided on the lamp bracket, and the plurality of welding points are distributed on the outer side surface of the lamp bracket, and the end face mask is welded to the lamp bracket by piercing the welding points.

[0012] Optionally, a plurality of limiting grooves are provided on the lamp bracket, the plurality of limiting grooves are distributed at the corners of the lamp bracket and the arrangement directions of the limiting grooves are different, a plurality of limiting pieces are provided on the inner side surface of the end face mask, the positions of the limiting pieces correspond to the positions of the limiting grooves, and the limiting pieces are inserted into the limiting grooves.

[0013] Optionally, a fixing plate is provided on one side of the lamp bracket, a first screw is installed on the fixing plate, and the inner end of the first screw is installed on the end face mask.

[0014] Optionally, mounting plates are provided around the decorative lamp. Second screws are installed on the mounting plates, and the inner ends of the second screws are installed on the lamp bracket. Positioning pins are also installed on part of the mounting plates for positioning with the lamp bracket.

[0015] Optionally, a PCB board is provided inside the decorative lamp, and a light-shielding structure is provided at the end of the PCB board.

[0016] Optionally, the decorative lamp has a double-layer sealed foamed rubber gasket.

[0017] Optionally, the bumper body material includes 70-90 parts of polypropylene, 5-15 parts of ethylene-propylene rubber, and 5-15 parts of calcium silicate.

[0018] The embodiment of the present invention also provides a preparation process for the light-emitting bumper as described above, including the following steps:

[0019] The end face mask is successively sprayed with a light-shielding primer, a topcoat, and a clear coat, and after drying, dot holes are laser-engraved to form a laser-engraved pattern;

[0020] The laser-engraved end face mask is puncture-welded to the outside of the lamp bracket;

[0021] The decorative lamp is installed inside the end face mask.

[0022] One or more technical solutions provided in the embodiment of the present invention have at least the following technical effects or advantages:

[0023] 1. The light-emitting bumper includes a mounting bracket, a bumper body, and a decorative lamp. The mounting bracket includes a load-bearing bracket and a lamp bracket. The upper brackets on both sides of the load-bearing bracket provide clamping positions for the lamp bracket, enabling the lamp bracket to be stably installed on the load-bearing bracket. The bumper body is split into left and right end face masks, reducing the volume of the bumper and facilitating the back-and-forth handling during the laser-engraving process. The end face mask is installed on the lamp bracket, and its light-emitting area is located outside the side collision area of the bumper, thus avoiding the frontal collision area and the side collision area and reducing potential safety hazards. The laser-engraved pattern in the light-emitting area is formed by fitting multiple dot holes. This dot structure effectively solves the paint adhesion problem while ensuring the pattern, avoiding the problems of secondary online painting, secondary spraying of the primer and clear coat for painted parts caused by the difference in paint adhesion between the laser-engraved area and the non-laser-engraved area in the traditional process, reducing production costs, and improving the product qualification rate. The decorative lamp is installed inside the end face mask and cooperates with the laser-engraved pattern to realize the shape display and interactive function of the light.

[0024] 2. Compared with the prior art, the present invention optimizes the layout of the light-emitting area of the bumper, skillfully avoiding the frontal and side collision points of the vehicle, reducing the risk of causing serious injuries to pedestrians in a collision accident, and at the same time ensuring that the bumper can effectively absorb energy during a collision, reducing the impact force on pedestrians. By adopting a new spraying process for the shading primer, color paint, and clear coat, as well as the laser engraving process, it avoids secondary on-line spraying and secondary baking, reduces problems such as product deformation and decreased paint adhesion, thereby reducing production costs, improving the product qualification rate, and realizing the mass production of the combination of body-color painting and laser engraving process with a transparent substrate. Reasonably plan the light-emitting area of the bumper to make it meet both aesthetic and functional requirements without affecting the safety performance of the vehicle, providing a greater creative space for the styling design. At the same time, through intelligent control, it realizes the interactive functions between the lights and the vehicle owner, such as intelligent welcome, music rhythm, charging display, etc., improving the vehicle owner's usage experience and the intelligent level of the vehicle.

[0025] Advantages of additional aspects of the present invention will be given in the following description, some of which will become obvious from the following description, or can be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. In addition, the distances or sizes between components are exaggerated for showing the positions of each component, and the schematic diagrams are only for illustrative purposes.

[0027] Figure 1 is a front view schematic diagram of the bumper provided by an embodiment of the present invention;

[0028] Figure 2 is a schematic diagram of the mounting bracket provided by an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the left and right end face masks provided by an embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of the laser engraving pattern on the end face mask provided by an embodiment of the present invention;

[0031] Figure 5 is a schematic diagram of the details of the laser engraving pattern provided by an embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of the lamp bracket provided by an embodiment of the present invention;

[0033] Figure 7 is a schematic diagram of the inner side of the bumper provided by an embodiment of the present invention;

[0034] Figure 8 is Figure 7 Cross-sectional view A1 in

[0035] Figure 9 is Figure 7 Cross-sectional view B1 in

[0036] Figure 10 is Figure 7 Cross-sectional view C1 in

[0037] Figure 11 Schematic diagram of the bumper and the upper headlight installation provided by the embodiment of the present invention;

[0038] Figure 12 Schematic diagram of the cooperation between the lamp bracket and the end face mask provided by the embodiment of the present invention;

[0039] Figure 13 Schematic diagram of the cooperation between the lamp bracket and the decorative lamp provided by the embodiment of the present invention;

[0040] Figure 14 Schematic diagram of the spraying process in the prior art;

[0041] Figure 15 Schematic diagram of the spraying process provided by the embodiment of the present invention;

[0042] In the figure: 1, bumper body; 11, frontal collision area; 12, side collision area; 13, end face mask; 131, non-light-emitting area; 132, light-emitting area; 133, laser engraving pattern; 134, dot hole; 135, limiting piece; 136, first screw; 2, load-bearing bracket; 21, upper bracket; 3, lamp bracket; 31, welding point; 32, limiting groove; 33, first load-bearing seat; 34, second screw; 35, positioning pin; 36, boss post; 4, decorative lamp; 41, light-blocking structure; 42, PCB board; 43, sealed foam gasket; 5, lifting point. Detailed implementation manners

[0043] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] Embodiment 1

[0045] As Figure 1 , Figure 2 shown, this embodiment proposes a light-emitting bumper, including: a mounting bracket, a bumper body 1, and a decorative lamp 4 (asFigure 6 The mounting bracket includes a load-bearing bracket 2 and a lamp bracket 3, the load-bearing bracket 2 has an upper bracket 21 on both sides, and the upper side of the lamp bracket 3 is clamped on the upper bracket 21; Figure 3 , Figure 4 As shown, the bumper body 1 includes end masks 13 located on both sides, the end masks 13 are installed on the lamp bracket 3, the end masks 13 have a luminous area 132 and a non-luminous area 131, the luminous area 132 is located on the outer side of the bumper side impact area 12, avoiding the bumper's front impact area 11 and side impact area 12, the luminous area 132 has a laser-carved pattern 133, and the laser-carved pattern 133 is fitted by a plurality of dot holes 134; the decorative lamp 4 is installed on the inner side of the end mask 13.

[0046] The upper bracket 21 absorbs the weight of the front protection system to prevent sinking. The bumper body 1 is split into left and right end masks 13 to reduce the volume of the bumper and facilitate the back and forth transportation of the bumper during the laser engraving process.

[0047] The decorative lamp 4 adopts a white and black two-color mask with a self-shielding structure, and the bumper luminous area 132 is as follows Figure 4 As shown, there are 1 LED in the first row, 3 LEDs in the second row, 5 LEDs in the third row, 2 LEDs in the fourth row, 2 LEDs in the fifth row, 2 LEDs in the sixth row, 2 LEDs in the seventh row, and 2 LEDs in the eighth row, for a total of 19 LEDs. The bumper is engraved with a laser pattern 133 through the laser engraving process, which gives the bumper lights a shape and leaves more room for styling design.

[0048] like Figure 5 As shown, the diameter of the dot hole 134 is 0.3 mm, and the distance between every two centers is 1 mm. Fitting the laser-carved pattern 133 through the dot hole 134 can prevent the paint adhesion from decreasing and falling off, avoid causing the paint spray parts to be put on the line twice, and avoid spraying primer and varnish twice, thereby reducing costs and improving the pass rate.

[0049] like Figure 7 , Figure 8 , Figure 10 As shown, the top of the inner side of the lamp bracket 3 is provided with a first load-bearing seat 33, and the upper bracket 21 is provided with a first slot and a second slot, the second slot is located on the upper side of the first slot, the first load-bearing seat 33 is inserted into the first slot, and the upper side of the end cover 13 is bent and embedded in the second slot. The lamp bracket 3 and the upper bracket 21 unload part of the weight of the decorative lamp 4 through the load-bearing seat; at the same time, Figure 11 As shown, there are three high-strength lifting points 5 on the headlight mask, which provide strong support and ensure the stability of the overall structure of the bumper.

[0050] like Figure 6As shown, a plurality of welding points 31 are provided on the lamp bracket 3, and the plurality of welding points 31 are distributed on the outer side surface of the lamp bracket 3. The end face mask 13 is puncture-welded to the lamp bracket 3 through the welding points 31. Puncture welding provides sufficient mechanical strength, and the distribution of the plurality of welding points 31 makes the welding more uniform, avoiding local stress concentration and improving the durability of the bumper. The end face mask 13 adopts a gradient of unequal material thickness from 3. - 2.8 mm to ensure that there are no appearance defects in the puncture welding process of welding the lamp bracket 3.

[0051] As Figure 6 , Figure 12 shown, a plurality of limiting grooves 32 are formed on the lamp bracket 3, and the plurality of limiting grooves 32 are distributed at the corners of the lamp bracket 3 and the arrangement directions of the respective limiting grooves 32 are different. A plurality of limiting pieces 135 are provided on the inner side surface of the end face mask 13, and the positions of the limiting pieces 135 correspond to the positions of the limiting grooves 32. The limiting pieces 135 are inserted into the limiting grooves 32. This design enables the end face mask 13 to achieve precise positioning through the cooperation of the limiting pieces 135 and the limiting grooves 32 during installation. The limiting grooves 32 in different directions can limit the end face mask 13 from multiple angles, effectively preventing the end face mask 13 from shaking and misaligning on the lamp bracket 3 and improving the assembly accuracy and reliability.

[0052] One side of the lamp bracket 3 is provided with a fixing plate, and a first screw 136 is installed on the fixing plate. The inner end of the first screw 136 is installed on the end face mask 13 to realize the pre-assembly of the lamp bracket 3 and the end face mask 13, enhancing the connection strength between the end face mask 13 and the lamp bracket 3.

[0053] As Figure 13 shown, an installation plate is provided around the decorative lamp 4, and a second screw 34 is installed on the installation plate. The inner end of the second screw 34 is installed on the boss post 36 of the lamp bracket 3, enabling the decorative lamp 4 to be quickly and accurately installed on the lamp bracket 3. A positioning pin 35 is also installed on some of the installation plates for positioning with the lamp bracket 3. The use of the positioning pin 35 ensures the position accuracy of the decorative lamp 4 during the installation process, avoiding problems such as poor optical effects or difficult assembly caused by position deviation. At the same time, the fastening effect of the second screw 34 ensures the stability of the decorative lamp 4 during use, preventing the decorative lamp 4 from loosening or shifting due to vibrations during vehicle driving, which may affect the lighting effect and service life.

[0054] The decorative lamp 4 has a PCB board 42 inside, and a light-blocking structure 41 is provided at the end of the PCB board 42. The decorative lamp 4 has a double-layer EPDM sealing foam gasket 43 (as Figure 9As shown). The PCB board 42 is the core component of the decorative lamp 4, which is used to install and connect LED lamp beads and other electronic components to achieve the control and display functions of the light. The design of the light-blocking structure 41 can effectively prevent the leakage and scattering of light at the end of the PCB board 42, ensure that the light propagates along the predetermined path and direction, improve the optical performance and display effect of the decorative lamp 4, realize complex light effects such as flowing water, breathing, and music rhythm of the decorative lamp 4, enable the light changes to be clearer and more accurate, and enhance the interactive experience with the vehicle owner. The main function of the double-layer sealed foam gasket 43 is dust and water prevention. It can effectively block external dust, moisture and other impurities from entering the interior of the decorative lamp 4, ensure that the optical components and electronic components inside the decorative lamp 4 work in a good environment, and extend the service life of the decorative lamp 4. At the same time, the sealed foam gasket 43 also has a certain shock-absorbing effect, which can reduce the impact of vibrations during vehicle driving on the decorative lamp 4 and protect the structural integrity of the decorative lamp 4.

[0055] The decorative lamp 4 comes with 20 chips of power supply, communication and power types. It enables the light to have flowing water, breathing, music rhythm, charging display, and the battery storage status is passed through the host control. There is an intelligent welcome function when starting and locking, and the whole vehicle music rhythm. At the same time, there is a switch to turn on or off the charging display through the large screen, which can be selected to be turned on or off according to the vehicle owner's needs; when it is turned on; the light shows the battery power and charging status through the light-emitting bumper.

[0056] The bumper body 1 is made of KLUX-6017 (a transparent pp grade) polypropylene material, and the specific composition is as shown in the following table. On the premise of meeting pedestrian protection safety, the material formula and grade of the transparent material are locked based on repeated tests of the stiffness, light transmittance, and haze of the transparent material. On the basis of considering cost and simplifying the painting process, through a new laser engraving process and painting process, the light source is determined not to leak light through the film thickness test of the light-shielding primer and the primer, topcoat, and clear coat.

[0057] Comparison table of this embodiment (KLUX-6017) with existing materials (KLUX-8018, ABP-2019)

[0058]

[0059] Physical property comparison table of the present invention (KLUX-6017) with existing materials (KLUX-8018, ABP-2019)

[0060]

[0061] The KLUX-6017 of this embodiment uses a transparent filler, which ensures the stiffness of the material while also maintaining the light transmittance of the 3MM thick material, and the dimensional stability of the material is also guaranteed. It has good fluidity and the product is easy to mold.

[0062] The existing material KLUX - 8018 has had the filler removed, improving the light transmittance of the material. However, its stiffness and dimensional stability cannot meet the requirements. At the same time, the material has poor fluidity, making product molding difficult, and defects such as weld lines will appear on the appearance.

[0063] The existing material ABP - 2019 has ordinary calcium carbonate filler, with stable dimensions, stable stiffness, low price, good material fluidity, easy molding and good appearance. However, its optical function is zero, it cannot transmit light, and it cannot meet the light transmittance requirements.

[0064] The decorative lights of the luminous bumper are bound to the main vehicle controller, providing an intelligent welcome function. When unlocking and locking, it has flowing and breathing lights, which light up the bumper through the laser - engraved patterns, giving the lights a shape. At the same time, the lights can generate rhythms along with the rhythm of the vehicle's music, enabling a small outdoor party, making the whole vehicle more energetic, and providing a new source of happiness for the vehicle owner besides driving. At the same time, when the vehicle of the present invention is equipped with an oil - electric hybrid, the vehicle owner can understand the battery charge level through the luminous area of the bumper when unlocking and locking without entering the vehicle. During charging, the intelligent luminous area will show light flashing and flowing notifications, allowing the vehicle owner to understand the charging status. In short, through the present invention, the whole vehicle and the vehicle owner can interact through lights, providing a brand - new design concept and solution for the vehicle's lights.

[0065] Example 2

[0066] This example provides the preparation process of the luminous bumper described in Example 1, including the following steps:

[0067] First is the spraying and laser - engraving process of the end face mask. As Figure 15 shown, after spraying the light - blocking primer, color paint and clear paint in sequence and then drying, laser - engraved holes are formed to create laser - engraved patterns. Compared with Figure 14 the traditional spraying process shown, this spraying process can ensure the flatness of the surface of the end face mask and the paint quality. The setting of laser - engraved holes provides the basis for the subsequent luminous effect. Through the dot - shaped patterns, the adhesion of the laser - engraved area reaches the state of the ordinary non - engraved area, simplifying the process of secondary online operation, shortening the time, and improving the efficiency and cost. Secondly, the laser - engraved end face mask is puncture - welded on the outside of the lamp bracket. This welding method not only fixes the end face mask but also provides the basis for the installation of the decorative lights. Then, the loose parts are assembled into a complete assembly. Finally, the decorative lights are installed on the inside of the end face mask through 8 screws with a diameter of 4.8 * 19 and main and auxiliary positioning pins, achieving precise and firm installation through the screws and positioning pins. The entire preparation process is simple, efficient, with each step closely connected, ensuring the quality and performance of the luminous bumper, and at the same time facilitating large - scale production and assembly.

[0068] Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, it is not a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications or deformations that can be made without creative efforts on the basis of the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A luminous bumper, characterized in that: include: Mounting brackets, bumper body and decorative lights; The mounting bracket comprises a load-bearing bracket and a lamp bracket, the load-bearing bracket has upper brackets on both sides, and the upper side of the lamp bracket is clamped on the upper bracket; The bumper body includes end face shields located on both sides, the end face shields are installed on the lamp bracket, the end face shields have a luminous area and a non-luminous area, the luminous area is located on the outer side of the bumper side impact area, avoiding the front impact area and the side impact area of ​​the bumper, the luminous area has a laser engraved pattern, and the laser engraved pattern is formed by fitting a plurality of point holes; The decorative lamp is installed on the inner side of the end cover.

2. The luminous bumper according to claim 1, characterized in that: A first load-bearing seat is arranged at the top of the inner side of the lamp bracket, and a first card slot and a second card slot are arranged on the upper bracket. The second card slot is located on the upper side of the first card slot, and the first load-bearing seat is inserted into the first card slot. The upper side of the end mask is bent and embedded in the second card slot.

3. The luminous bumper according to claim 1, characterized in that: The lamp bracket is provided with a plurality of welding points, which are distributed on the outer surface of the lamp bracket, and the end cover is pierced and welded to the lamp bracket through the welding points.

4. The luminous bumper according to claim 1, characterized in that: The lamp bracket is provided with a plurality of limit grooves, which are distributed on the corners of the lamp bracket and arranged in different directions. The inner side surface of the end mask is provided with a plurality of limit plates, the positions of the limit plates correspond to the positions of the limit grooves, and the limit plates are inserted into the limit grooves.

5. The luminous bumper according to claim 1, characterized in that: A fixing plate is provided at one side of the lamp bracket, a first screw is installed on the fixing plate, and an inner end of the first screw is installed on the end cover.

6. The luminous bumper according to claim 1, characterized in that: The decorative lamp is provided with mounting plates around it, and second screws are installed on the mounting plates. The inner ends of the second screws are installed on the lamp bracket, and positioning pins are also installed on some mounting plates for positioning with the lamp bracket.

7. The luminous bumper according to claim 1, characterized in that: The decorative lamp has a PCB board inside, and the end of the PCB board has a light isolation structure.

8. The luminous bumper according to claim 1, characterized in that: The decorative lamp has a double-layer sealed foam rubber pad.

9. The luminous bumper according to claim 1, characterized in that: The bumper body material comprises 70-90 parts of polypropylene, 5-15 parts of ethylene-propylene rubber and 5-15 parts of calcium silicate.

10. A process for preparing a luminous bumper according to any one of claims 1 to 9, characterized in that: The following steps are involved: The end mask is sprayed with light-shielding primer, color paint and varnish in sequence, and after drying, laser-carved holes are formed to form laser-carved patterns; Puncture and weld the laser-engraved end mask to the outside of the lamp bracket; The decorative lights are mounted on the inside of the end mask.

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