Automotive lighted front face structure and method of manufacturing the same

Abstract

The application discloses a car light-emitting front face structure and a manufacturing method thereof. The car light-emitting front face structure comprises a lamp assembly, which comprises a top cover and a base that are spliced with each other; a first sealing member arranged between the top cover and the base; a light source member; a connecting bracket; a locking bolt that passes through a mounting hole of the base and is threadedly connected with a threaded hole of the connecting bracket; a second sealing member arranged between the connecting bracket and the top cover; and a skin comprising a skin main body and a light-shielding primer layer, wherein the front surface of the skin main body is paved with the light-shielding primer layer, and the light-shielding primer layer is provided with a second hollow hole to partially expose the skin main body. The base, the top cover and the connecting bracket are locked together through the locking bolt, the first sealing member and the second sealing member are fully filled in the joint gap during the process of tightening the locking bolt, and the sealing effect is achieved; and the surface of the skin main body is leveled through the transparent PP water primer layer, the recess at the second hollow hole is filled, and the concave-convex feeling of the skin after coating is reduced.

Description

Technical Field

[0001] This application relates to the field of automotive manufacturing technology, and in particular to an illuminated front grille structure for automobiles and its manufacturing method. Background Technology

[0002] Compared to traditional gasoline-powered vehicles, new energy vehicles do not require forced air intake to cool the engine. Therefore, the air intake function of the front of new energy vehicles is reduced, while the decorative function is enhanced. Without the need for an air intake grille, the front of new energy vehicles has more design freedom.

[0003] Currently, for the front of new energy vehicles, lights are typically installed between the body panel and the bumper. When the lights are off, the body panel conceals the internal structure, making it seamlessly integrated with the vehicle body and obscuring the lights. When the lights are on, the light travels from the back of the body panel to the front, and through a laser-engraved structure, the light displays corresponding patterns, enhancing the vehicle's technological and mysterious appearance. Simultaneously, the lights are connected to the vehicle's control system, allowing adjustments to parameters such as the timing of switching, brightness, and color temperature. With the increasing prevalence of illuminated front fascias in the market, OEMs are showing greater acceptance of them, leading to higher demands for their aesthetic appeal.

[0004] The front of a car is close to the ground, making it susceptible to water splashes during driving and water damage during long-term outdoor driving and parking. Since the illuminated front panel houses many electronic components, water ingress can significantly affect their operation; it can also create condensation, blurring the lights and affecting the final effect. Furthermore, to ensure clear light transmission, the laser-engraved structure is typically installed on the front of the body panel, followed by a coat of clear coat and translucent paint to fill the gap between the laser-engraved structure and the body panel. However, after the paint dries, the paint in the laser-engraved areas inevitably settles, creating indentations that are noticeable upon close inspection or touch. Summary of the Invention

[0005] The purpose of this application is to at least solve one of the technical problems existing in the prior art, and to provide a car luminous front face structure that can improve waterproof performance and sealing performance; in addition, it also provides a manufacturing method for the above-mentioned car luminous front face, which not only has good waterproof performance and sealing performance, but also makes the front face surface of the car smoother to reduce the feeling of unevenness.

[0006] According to a first aspect of this application, a car luminous front fascia structure is provided, comprising:

[0007] A lighting assembly includes a top cover and a base. The base is provided with mounting holes and a fixing groove. The fixing groove is opened around the outer contour edge of the base. The outer contour edge of the top cover is provided with a joint portion that can be inserted into the fixing groove. The top cover is provided with a first hollow hole.

[0008] A first sealing element is disposed within the fixing groove to fill the gap between the joint and the fixing groove;

[0009] A light source element is installed inside the lamp assembly, and the light source element is used to emit light and allow the light to pass through the first hollow hole;

[0010] The connecting bracket is annular and has threaded holes;

[0011] A locking bolt, which passes through the mounting hole of the base and is threadedly connected to the threaded hole of the connecting bracket, is used to drive the connecting bracket to press against the top cover and to drive the top cover to press against the base;

[0012] The second sealing element is annular and disposed between the connecting bracket and the top cover. When the connecting bracket is pressed against the top cover, the second sealing element is clamped by the connecting bracket and the top cover.

[0013] The skin includes a skin body and a light-shielding primer layer. The skin body is a semi-transparent part. The back of the skin body is bonded to the connecting bracket. The light-shielding primer layer is laid on the front of the skin body. The light-shielding primer layer has a second hollow hole to partially expose the skin body. The projection of the first hollow hole along the light path direction of the light source is located outside the outer contour of the second hollow hole.

[0014] When the light source is turned on, the light passes through the first hollow hole, the connecting bracket, the skin body and the second hollow hole in sequence.

[0015] According to a first aspect of the present application, the lamp assembly further includes a circuit board, which is installed inside the base. The circuit board transitions from a first surface to a second surface along its thickness direction. The light source is installed on the first surface of the circuit board, and a heat sink is installed on the second surface of the circuit board to dissipate heat from the light source.

[0016] According to a first aspect of the present application, the automotive luminous front structure further includes a controller, which is installed between the base and the second surface of the circuit board, and is electrically connected to the circuit board.

[0017] According to the first aspect of the present application, the lamp assembly further includes a lamp cover, which is a transparent part and covers the top cover. The light emitted by the light source passes through the first perforation and is then emitted from the lamp cover.

[0018] According to a first aspect of this application, the top cover surface is provided with an annular stepped surface, and the second seal is installed on the stepped surface.

[0019] According to a first aspect of the present application, the connecting bracket is further provided with an adhesive fixing groove on the side facing the skin body, and the adhesive fixing groove is filled with adhesive to bond with the skin body.

[0020] According to the first aspect of the present application, the skin further includes a PP water-based primer layer, which is a transparent layer and covers the light-shielding primer layer, for leveling and improving the adhesion of subsequent paint layers.

[0021] According to the first aspect of the present application, the skin further includes a translucent body paint layer and a clear coat layer; the translucent body paint layer covers the PP water-based primer layer to cover the second perforation and to make the skin match the body color; the clear coat layer covers the translucent body paint layer to protect the translucent body paint layer.

[0022] According to a second aspect of this application, a method for manufacturing the above-described automotive luminous front fascia structure is provided, comprising the following steps:

[0023] Apply a light-shielding primer to the front side of the skin body to form the light-shielding primer layer;

[0024] The light-shielding primer layer is laser-engraved to create the second hollow hole;

[0025] A transparent PP water is applied to the surface of the light-shielding primer layer to level it and improve the adhesion of subsequent paint layers, forming a PP water primer layer.

[0026] A translucent body paint is applied to the surface of the PP water-based primer layer to form a translucent body paint layer, which is used to cover the second perforation and to make the skin match the body color.

[0027] A clear coat is applied to the surface of the translucent car body paint layer to form a clear coat layer for protecting the translucent car body paint layer;

[0028] The skin body is bonded to the connecting bracket;

[0029] The light source is installed in the base, and the first sealing member is placed in the fixing groove;

[0030] The top cover is assembled with the base so that the joint is inserted into the fixing groove and abuts against the first sealing member;

[0031] The locking bolt is passed through the mounting hole of the base and threaded into the threaded hole of the connecting bracket. The locking bolt is tightened so that the first seal is squeezed by the fixing groove and the joint, and the second seal is squeezed by the connecting bracket and the top cover.

[0032] According to the first aspect of the present application, before bonding the skin body to the connecting bracket, the glue application area of ​​the skin body is first subjected to plasma flame treatment. After applying glue, the skin body and the connecting bracket are pressed together by a pressing device and the pressing is maintained for at least 5 minutes.

[0033] The beneficial effects of this application embodiment include at least the following: This application locks the base, top cover and connecting bracket together with locking bolts, and during the tightening of the locking bolts, the first seal and the second seal fully fill the joint gap, so as to achieve a sealing effect; for the surface of the skin body, a transparent PP water-based primer layer is used to level it and fill the depression at the second hollow hole, thereby reducing the unevenness of the skin after the coating is completed. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this application, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0035] Figure 1 This is a front view of the automotive luminous front fascia structure according to the first aspect embodiment of this application;

[0036] Figure 2 yes Figure 1 A sectional view;

[0037] Figure 3 This is a three-dimensional view of the base 120 in the automotive luminous front face structure according to the first aspect embodiment of this application;

[0038] Figure 4 This is a three-dimensional view of the top cover 110 in the automotive luminous front face structure according to the first aspect embodiment of this application;

[0039] Figure 5 yes Figure 2 A magnified view of a section at point B in the middle;

[0040] Figure 6 yes Figure 2 A magnified view of a section at point C;

[0041] Figure 7 This is a diagram showing the distribution of each paint layer on the skin 700 in the manufacturing method of the second aspect embodiment of this application.

[0042] Reference numerals: 100-Lamp assembly, 110-Top cover, 111-Joint, 112-First perforation, 113-Step surface, 120-Base, 121-Mounting hole, 122-Fixing groove, 130-Circuit board, 140-Radiator, 150-Lamp cover, 200-First seal, 300-Light source, 400-Connecting bracket, 410-Threaded hole, 420-Glue fixing groove, 500-Locking bolt, 600-Second seal, 700-Skin, 710-Skin body, 720-Light-shielding primer layer, 721-Second perforation, 730-PP water-based primer layer, 740-Transparent body paint layer, 750-Clear coat layer. Detailed Implementation

[0043] This section will describe in detail the specific embodiments of this application. Preferred embodiments of this application are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of this application, but they should not be construed as limiting the scope of protection of this application.

[0044] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0046] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0047] Currently, new energy vehicles on the market are increasingly adopting illuminated front grilles instead of traditional air intake grilles. However, the front of the car is relatively close to the ground, making it susceptible to water splashes during driving and water corrosion during long-term outdoor driving and parking. Since the illuminated front grille houses many electronic components, water ingress can significantly affect their operation; it can also create water vapor, blurring the lights and affecting the final effect. Furthermore, to ensure clear light transmission, laser-engraved structures are typically installed on the front of the body panel, followed by a coat of clear coat and translucent paint to fill the gap between the laser-engraved structure and the body panel. However, after the paint dries, the paint in the laser-engraved areas inevitably settles, creating indentations that are noticeable upon close inspection or touch.

[0048] In response, this application proposes a car luminous front face structure and its manufacturing method. The base 120, top cover 110 and connecting bracket 400 are locked together by locking bolts 500. During the tightening of the locking bolts 500, the first sealing element 200 and the second sealing element 600 are fully filled to achieve a sealing effect. For the surface of the skin body 710, a transparent PP water-based primer layer 730 is used to level it and fill the depression at the second hollow hole 721, reducing the unevenness of the skin 700 after painting.

[0049] The automotive luminous front fascia structure in the first aspect embodiment of this application includes a lamp assembly 100, a first seal 200, a light source 300, a connecting bracket 400, a locking bolt 500, a second seal 600, and a skin 700. (Refer to...) Figure 1 and Figure 2 The lamp assembly 100 is used to mount components such as the light source 300, and plays a role in protection and sealing. The skin 700 is set on the surface. When the light source 300 is not activated, the skin 700 can cover the lamp assembly 100 and maintain visual consistency with the vehicle body. When the light source 300 is activated, the light can shine outward through the skin 700.

[0050] Specifically, the lighting assembly 100 includes a top cover 110 and a base 120. (See reference...) Figure 3 The base 120 is provided with mounting holes 121 and fixing grooves 122. The fixing grooves 122 are formed around the outer contour edge of the base 120 for splicing with the top cover 110; the mounting holes 121 are provided on the edge of the base 120 for cooperating with locking bolts 500 to fix the lamp assembly 100.

[0051] Reference Figure 4 The outer contour edge of the top cover 110 is provided with a connecting portion 111, which can be inserted into the fixing groove 122. (See reference...) Figure 5A first sealing element 200 is also provided in the fixing groove 122. This element is elastic; when the joint 111 is inserted into the fixing groove 122, the first sealing element 200 is deformed under pressure, thereby filling the gap between the joint 111 and the fixing groove 122, achieving a sealing effect. It is worth noting that the top cover 110 also has a first perforated hole 112, through which the light emitted by the light source 300 installed inside the lamp assembly 100 can pass and illuminate the outside.

[0052] The light source 300 is a device capable of emitting light. In this embodiment, the light source 300 is an LED light integrated on the PCBA board. It is readily understood that other lamps can also be used to generate light, and this application does not limit the type of light source 300.

[0053] To ensure a secure connection between the top cover 110 and the base 120, a force is applied to bring the top cover 110 and the base 120 closer together using the connecting bracket 400 and locking bolts 500. Specifically, refer to... Figure 6 The connecting bracket 400 is annular to reduce obstruction of the optical path and has a threaded hole 410. The connecting bracket 400 is connected to the top cover 110. The locking bolt 500 passes through the mounting hole 121 of the base 120 and is threadedly connected to the threaded hole 410 of the connecting bracket 400. When the locking bolt 500 is tightened, it drives the connecting bracket 400 to press against the top cover 110 and the top cover 110 to press against the base 120, thus clamping and fixing the three together.

[0054] Furthermore, a second sealing element 600 is provided between the connecting bracket 400 and the top cover 110. This second sealing element is annular and elastic. When the connecting bracket 400 presses against the top cover 110, the second sealing element 600 is clamped between the connecting bracket 400 and the top cover 110, and simultaneously deforms under pressure to fill the gap between them, thus providing a sealing and dustproof function. Specifically, the second sealing element 600 can be made of EVA foam and is bonded to the top cover 110 or the connecting bracket 400. Furthermore, the surface of the top cover 110 has an annular stepped surface 113. The second sealing element 600 is installed on the stepped surface 113, which limits its position and also indicates its installation location.

[0055] Reference Figure 7The skin 700 includes a skin body 710 and a light-shielding primer layer 720. The skin body 710 is a semi-transparent component, specifically made of PP material. A milky white masterbatch is added at a ratio of 1:0.05 to form a light-diffusing PP material with a light transmittance controlled between 60% and 70%, allowing light to pass through the skin body 710. The light-shielding primer layer 720 is applied using a light-shielding primer to block light transmission. The back of the skin body 710 is bonded to the connecting bracket 400, and the front of the skin body 710 is covered with the light-shielding primer layer 720. Notably, the light-shielding primer layer 720 has a second perforation 721 to partially expose the skin body 710. The projection of the first perforation 112 along the light path of the light source 300 is located outside the outer contour of the second perforation 721. In actual design, the outline shape of the second perforation 721 is the pattern actually projected by the light.

[0056] When the light source 300 is turned on, the light passes through the first hollow hole 112, the connecting bracket 400, the skin body 710 and the second hollow hole 721 in sequence, and finally shines out to the outside.

[0057] Furthermore, the lighting assembly 100 also includes a circuit board 130, which is installed inside the base 120. The circuit board 130 transitions from a first surface to a second surface along its thickness direction. The light source 300 is installed on the first surface of the circuit board 130 and electrically connected thereto. A heat sink 140 is installed on the second surface of the circuit board 130 to dissipate heat from the light source 300.

[0058] Furthermore, the illuminated front fascia structure also includes a controller, which is installed between the base 120 and the second surface of the circuit board 130 to prevent obstruction of the light path of the light source 300. The heat generated by the controller can also be dissipated through the radiator 140. The controller is electrically connected to the circuit board 130 and can be connected to the vehicle control system to control the circuit board 130. Normally, the illuminated front fascia will automatically illuminate when the vehicle is not in motion; when the vehicle is in motion, the light source 300 will turn off to reduce its impact on driving.

[0059] Furthermore, the lamp assembly 100 also includes a lamp cover 150, which is transparent and covers the top cover 110. Light emitted from the light source 300 passes through the first perforation 112 and then shines through the lamp cover 150. The function of the lamp cover 150 is to seal the first perforation 112 to prevent external water from seeping in, while also reducing the impact on the light path of the light source 300.

[0060] Furthermore, the connecting bracket 400 has an adhesive fixing groove 420 on the side facing the skin body 710, and the adhesive fixing groove 420 is filled with adhesive to bond with the skin body 710.

[0061] The paint layer of the skin 700 also includes a PP water-based primer layer 730. PP water, also known as potassium permanganate aqueous solution, is generally used as a primer to increase paint adhesion and reduce the probability of paint peeling. The PP water-based primer layer 730 is a transparent layer that allows light to pass through, and it covers the light-blocking primer layer 720. It is used to fill the recesses of the second perforation 721, to level the surface, and to improve the adhesion of subsequent paint layers.

[0062] The skin 700 also includes a translucent body paint layer 740 and a clear coat layer 750. The translucent body paint layer 740 covers the PP water-based primer layer 730 and is used to cover the second perforation 721 and to make the skin 700 match the body color. The clear coat layer 750 covers the translucent body paint layer 740 and is used to protect the translucent body paint layer 740.

[0063] It's easy to understand that the color of the 740 translucent paint layer affects light transmittance; generally, white has high transmittance, while black has low transmittance. For colors with low transmittance, a higher-brightness light source 300 is used to make the luminous effects of different paint colors more similar.

[0064] The manufacturing method in the second aspect of this application, used to manufacture the above-mentioned illuminated front fascia structure for automobiles, includes the following steps:

[0065] S100. Apply a light-shielding primer to the front of the skin body 710 to form a light-shielding primer layer 720, and dry it with hot air at 75°C for 40 minutes.

[0066] S200. Laser engraving is performed on the light-shielding primer layer 720 to carve out the second hollow hole 721. The outline of the second hollow hole 721 is the shape of the light pattern to be presented.

[0067] S300. Apply transparent PP water to the surface of the light-shielding primer layer 720 to fill the depression at the second hollow hole 721 to level it and improve the adhesion of subsequent paint layers, forming a PP water primer layer 730.

[0068] S400. Apply translucent body paint to the surface of PP water primer layer 730 to form translucent body paint layer 740, which is used to cover the second perforation 721 and to make the skin 700 match the body color.

[0069] S500. Apply clear coat to the surface of the translucent body paint layer 740 to form clear coat layer 750, and dry with hot air at 75°C for 40 minutes to protect the translucent body paint layer 740.

[0070] S600. Attach the skin body 710 to the connecting bracket 400;

[0071] S700. Install the light source 300 in the base 120 and place the first sealing member 200 into the fixing groove 122;

[0072] S800. The top cover 110 and the base 120 are joined together so that the joint 111 is inserted into the fixing groove 122 and abuts against the first seal 200;

[0073] S900. Pass the locking bolt 500 through the mounting hole 121 of the base 120 and thread it into the threaded hole 410 of the connecting bracket 400. Tighten the locking bolt 500 so that the first seal 200 is squeezed by the fixing groove 122 and the joint 111, and the second seal 600 is squeezed by the connecting bracket 400 and the top cover 110.

[0074] Specifically, before bonding the skin body 710 to the connecting bracket 400, the adhesive application area of ​​the skin body 710 is first subjected to plasma flame treatment to improve the adhesion between the adhesive and the surface of the skin body 710. After applying the adhesive, the skin body 710 and the connecting bracket 400 are pressed together using a pressing device, and the pressing is maintained for at least 5 minutes.

[0075] After assembly, the lamp assembly 100 is tested for air tightness. If no abnormalities are found, the power-on test is then performed.

[0076] The above is a detailed description of the preferred embodiments of this application. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A car illuminated front grille structure, characterized in that, include: A lighting assembly (100) includes a top cover (110) and a base (120). The base (120) is provided with a mounting hole (121) and a fixing groove (122). The fixing groove (122) is opened around the outer contour edge of the base (120). The outer contour edge of the top cover (110) is provided with a joint (111). The joint (111) can be inserted into the fixing groove (122). The top cover (110) is provided with a first hollow hole (112). A first sealing element (200) is disposed in the fixing groove (122) to fill the gap between the joint (111) and the fixing groove (122); A light source (300) is installed inside the lamp assembly (100) and is used to emit light and allow the light to pass through the first perforation (112); A connecting bracket (400) is annular and has a threaded hole (410); A locking bolt (500) passes through the mounting hole (121) of the base (120) and is threadedly connected to the threaded hole (410) of the connecting bracket (400) for driving the connecting bracket (400) to press against the top cover (110) and driving the top cover (110) to press against the base (120). The second sealing element (600) is annular and disposed between the connecting bracket (400) and the top cover (110). When the connecting bracket (400) presses against the top cover (110), the second sealing element (600) is clamped by the connecting bracket (400) and the top cover (110). Skin (700), comprising skin body (710) and light-shielding primer layer (720), wherein the skin body (710) is a semi-transparent part, the back of the skin body (710) is bonded to the connecting bracket (400), the front of the skin body (710) is covered with the light-shielding primer layer (720), the light-shielding primer layer (720) has a second hollow hole (721) to partially expose the skin body (710), the projection of the first hollow hole (112) along the light path direction of the light source is located outside the outer contour of the second hollow hole (721); When the light source (300) is turned on, the light passes through the first hollow hole (112), the connecting bracket (400), the skin body (710), and the second hollow hole (721) in sequence.

2. The automotive luminous front grille structure according to claim 1, characterized in that: The lighting assembly (100) also includes a circuit board (130) which is installed inside the base (120). The circuit board (130) transitions from a first surface to a second surface along its thickness direction. The light source (300) is installed on the first surface of the circuit board (130), and a heat sink (140) is installed on the second surface of the circuit board (130) to dissipate heat from the light source (300).

3. The automotive luminous front grille structure according to claim 2, characterized in that: The illuminated front structure of the car also includes a controller, which is installed between the base (120) and the second surface of the circuit board (130), and the controller is electrically connected to the circuit board (130).

4. The automotive luminous front grille structure according to claim 1, characterized in that: The lamp assembly (100) also includes a lamp cover (150), which is a transparent part and covers the top cover (110). The light emitted by the light source (300) passes through the first perforation (112) and is then emitted from the lamp cover (150).

5. The automotive luminous front grille structure according to claim 1, characterized in that: The top cover (110) has an annular stepped surface (113) on its surface, and the second seal (600) is installed on the stepped surface (113).

6. The automotive luminous front grille structure according to claim 1, characterized in that: The connecting bracket (400) is provided with an adhesive fixing groove (420) on the side facing the skin body (710), and the adhesive fixing groove (420) is filled with adhesive to bond with the skin body (710).

7. The automotive luminous front grille structure according to claim 1, characterized in that: The skin (700) also includes a PP water-based primer layer (730), which is a transparent layer and covers the light-shielding primer layer (720) to level the surface and improve the adhesion of subsequent paint layers.

8. The automotive luminous front grille structure according to claim 7, characterized in that: The skin (700) further includes a translucent body paint layer (740) and a clear coat layer (750); the translucent body paint layer (740) covers the PP water primer layer (730) and is used to cover the second perforation (721) and make the skin (700) match the body color; the clear coat layer (750) covers the translucent body paint layer (740) and is used to protect the translucent body paint layer (740).

9. A method for manufacturing an automotive luminous front fascia structure according to any one of claims 1 to 8, characterized in that, Includes the following steps: Apply a light-shielding primer to the front side of the skin body (710) to form the light-shielding primer layer (720); Laser engraving is performed on the light-shielding primer layer (720) to carve out the second hollow hole (721); A transparent PP water is applied to the surface of the light-shielding primer layer (720) to level it and improve the adhesion of subsequent paint layers, forming a PP water primer layer (730); A translucent body paint is applied to the surface of the PP water-based primer layer (730) to form a translucent body paint layer (740), which is used to cover the second perforation (721) and to make the skin (700) match the body color. A clear coat is applied to the surface of the translucent body paint layer (740) to form a clear coat layer (750) for protecting the translucent body paint layer (740); The skin body (710) is bonded to the connecting bracket (400); The light source (300) is installed in the base (120), and the first sealing member (200) is placed in the fixing groove (122); The top cover (110) is joined with the base (120) so that the joint (111) is inserted into the fixing groove (122) and abuts against the first sealing member (200); The locking bolt (500) is passed through the mounting hole (121) of the base (120) and threaded into the threaded hole (410) of the connecting bracket (400). The locking bolt (500) is tightened so that the first seal (200) is pressed by the fixing groove (122) and the joint (111), and the second seal (600) is pressed by the connecting bracket (400) and the top cover (110).

10. The manufacturing method according to claim 9, characterized in that: Before bonding the skin body (710) to the connecting bracket (400), the glue application area of ​​the skin body (710) is first subjected to plasma flame treatment. After applying the glue, the skin body (710) and the connecting bracket (400) are pressed together by a pressing device and kept pressed for at least 5 minutes.

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