Decoration assembly for car lamp

Abstract

A decoration assembly for a car lamp comprises a decoration part, a thick wall and a shading part, the thick wall is located on the decoration part, the shading part is located on the thick wall, a limiting structure is arranged between the thick wall and the decoration part, a positioning structure is arranged between the shading part and the thick wall, and the decoration part, the thick wall and the shading part are installed together and then form an integrated structure through ultrasonic welding. The decorating part, the thick wall and the shading part are integrally welded, so that the machining efficiency is high, the machining quality is better, the product percent of pass is higher, the production cost is greatly reduced, the long-strip-shaped welding groove formed in the decorating part is matched with the thick wall protrusion arranged on the thick wall to achieve the welding function, and therefore the problem that welding slag splashes everywhere during ultrasonic welding can be avoided; and welded parts are more attractive.

Description

Technical Field

[0001] The utility model belongs to the field of lighting devices, and in particular relates to a decorative component for a vehicle lamp. Background Art

[0002] Automotive taillights are generally used primarily as signal lights, alerting drivers behind them to the vehicle's position, braking, steering, reversing, and other driving information. These functional units are arranged independently or in combination throughout the lamp, and their light sources primarily include halogen bulbs and LED modules. Currently, halogen bulbs and LEDs are the predominant light sources used in automotive taillights. Halogen lamps have the longest history of use, boast a simple structure, mature technology, low manufacturing costs, and excellent penetration in extreme weather conditions such as rain, snow, and fog. However, they also suffer from numerous drawbacks, including low brightness, short range, high heat generation during use, low efficiency, and a short lifespan. LEDs, as an alternative to halogen lamps, offer long lifespans and high luminous efficiency. They require no color filtering and can directly produce the red and amber colors required for automotive lighting, achieving zero loss and an energy efficiency exceeding 80%. However, their high brightness can cause glare to drivers behind them, and LED lamp beads generate significant heat, placing high demands on the material's heat resistance and heat dissipation structure. Compared with the point light sources of halogen bulbs and LED lamp beads, OLED screens have the characteristics of surface light sources and diffuse reflection, with uniform light quality and infinite dimming, avoiding hazards such as glare. They also have a long lifespan, do not generate heat, and do not require a reflective mechanism to ensure the lighting effect, simplifying the structural design and assembly of car lights.

[0003] Currently, the main sealing methods for signal lights in headlights include welding, adhesive sealing, sealing rings, or a combination of two methods, such as adhesive sealing and sealing ring sealing. Ultrasonic welding is one of these methods, offering relatively good waterproofing and requiring minimal space. Ultrasonic welding utilizes high-frequency vibration waves transmitted to the surfaces of the two objects to be welded. Under pressure, the surfaces rub against each other, creating a molecular fusion bond. One of the two objects to be welded is provided with a sharp weld rib or welding point, while the other is provided with a flat surface or recessed area, effectively applying external pressure to bond the two. However, due to process limitations, ultrasonic welding can only be used once in an integrated headlight structure. The vibration energy of the second ultrasonic weld can affect the welded area, potentially causing cracking or detachment, resulting in a counterproductive effect. Therefore, a combination of ultrasonic welding and adhesive sealing or sealing rings is generally used. However, the space in new taillight structures is very limited, making it difficult to use vibration friction welding, hot plate welding, screws, adhesive sealing, or sealing rings. Utility Model Content

[0004] In view of the above-mentioned prior art, the purpose of the present invention is to provide a decorative component for vehicle lamps with a higher yield rate.

[0005] The technical solution of the present utility model is achieved as follows: a decorative component for a vehicle lamp includes a decorative part, a thick wall and a shading part, the thick wall is located on the decorative part, the shading part is located on the thick wall, a limiting structure is provided between the thick wall and the decorative part, and a positioning structure is provided between the shading part and the thick wall, and the decorative part, the thick wall and the shading part are installed together and ultrasonically welded to form an integrated structure.

[0006] The benefits of this design are: the integrated welding of decorative components, thick-walled components, and light-shielding components not only improves processing efficiency and quality, but also increases product qualification rates and significantly reduces production costs. Furthermore, ultrasonic welding saves space, making the entire lamp structure feasible.

[0007] Furthermore, the decorative part is provided with a long strip welding groove which matches the thick-walled protrusion provided with the thick wall to realize the welding function, thereby avoiding the problem of welding slag splashing everywhere during ultrasonic welding, and the welded parts are more beautiful.

[0008] Furthermore, the decorative part is provided with a positioning hole which matches the positioning column provided with a thick wall to realize the positioning or limiting function, so that the installation position is more accurate and the position after welding is more precise and no misalignment occurs.

[0009] Furthermore, a welding groove is provided on the thick wall to match the welding rib provided on the shading piece to realize the welding function. The welding groove allows the residue generated by welding to remain in the annular welding groove, thereby preventing the problem of plastic residue splashing.

[0010] Furthermore, a limiting hole is provided on the thick wall to match the limiting column provided on the shading member to realize the positioning or limiting function, so that the shading member can be tightly welded to the thick wall to avoid light leakage.

[0011] Furthermore, the shading member is an arc-shaped strip structure, so the lamp can also be set to be arc-shaped, and the shading distance is the same to form a more beautiful light spot.

[0012] Furthermore, the thick wall includes a first thick wall, a second thick wall and a third thick wall, the decorative part is provided with a first welding position, a second welding position and a third welding position, the first thick wall is installed to the first welding position through a limiting structure, the second thick wall is installed to the second welding position through a limiting structure, and the third thick wall is installed to the third welding position through a limiting structure, the light shading part is provided with a first light shading part, a second light shading part and a third light shading part, the first light shading part, the second light shading part and the third light shading part are synchronously installed to the first thick wall, the second thick wall and the third thick wall through a positioning structure, and the decorative part, the light shading part, the first thick wall, the second thick wall and the third thick wall are installed together and ultrasonic welding is adopted to form an integrated structure. The taillight structure in the prior art generally includes many thick walls, including thick walls for turning left, turning right or position, which are used for indication, so the space requirements are very high. When ultrasonically welding the three thick walls to the decorative parts at the bottom, they need to be welded in sections and blocks. The ultrasonic wave needs to set the welding position and find the positioning column and guide column of the decorative parts so that the decorative parts and the thick walls can be accurately welded. However, this will make the process cumbersome. If one of the thick walls is not accurately positioned, the welding misalignment will cause the yield rate of the entire taillight structure to be very low. After the decorative parts, light shielding parts, first thick wall, second thick wall and third thick wall are installed together, ultrasonic welding is used to form an integrated structure without misalignment, and the one-time welding quality is higher.

[0013] Furthermore, the decorative component is provided with a first partition and a second partition, the first thick wall and the second thick wall are installed on both sides of the first partition, and the second thick wall and the third thick wall are installed on both sides of the second partition, so as to avoid interference between the lamps to form excess light.

[0014] Furthermore, the decorative component is provided with a circuit board mounting position and a positioning structure for mounting a circuit board with a light source, so that the relative position of the light source with respect to the decorative component can be more stable.

[0015] Furthermore, the decoration component also includes a first lampshade and a second lampshade. The first lampshade and the second lampshade are formed into an integrated structure and a cavity by ultrasonic welding, so that the sealing performance is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional exploded schematic diagram of a decorative component for a vehicle lamp according to the present invention;

[0017] Figure 2 This is a three-dimensional schematic diagram of a decorative component for a vehicle lamp according to the present invention;

[0018] Figure 3 This is a three-dimensional schematic diagram of a decorative piece of a decorative assembly for a vehicle lamp according to the present invention;

[0019] Figure 4 This is a thick-walled three-dimensional schematic diagram of a decorative component for a vehicle lamp according to the present invention;

[0020] Figure 5 This is a cutaway perspective schematic diagram of a decorative component for a vehicle lamp according to the present invention;

[0021] Figure 6 The utility model is a cutaway perspective schematic diagram of a decorative component for a vehicle lamp. DETAILED DESCRIPTION

[0022] As needed, detailed embodiments of the present invention are disclosed herein, but it should be understood that the disclosed embodiments are merely exemplary of the present invention, and the present invention may be implemented in different and alternative forms. The accompanying drawings are not necessarily drawn to scale, and certain features may be exaggerated or reduced to illustrate the details of specific components. Therefore, the specific structural and functional details disclosed herein should not be understood as having a limiting meaning, but merely as a representative basis to teach those skilled in the art to adopt the present invention differently. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, a decorative assembly for a vehicle lamp includes a decorative part 1, a thick-walled part 2, and a light shield 3. The thick-walled part 2 is positioned on the decorative part 1, and the light shield 3 is positioned on the thick-walled part 2. A retaining structure is provided between the thick-walled part 2 and the decorative part 1, and a positioning structure is provided between the light shield 3 and the thick-walled part 2. After the decorative part 1, thick-walled part 2, and light shield 3 are assembled together, they are ultrasonically welded to form a one-piece structure. The decorative part 1 is made of ABS plastic, which includes: A acrylonitrile for hardness and heat resistance; B butadiene for impact resistance; and S styrene for formability and fluidity. ABS can typically be molded above 160°C and has excellent thermal stability during the molding process. PP or PC are second choices. The decorative part is a one-piece plastic part. The thick-walled part is made of PMMA, and the light shield is made of PVC. Using an ultrasonic generator, vibration welding is performed from top to bottom. The welded structures on the thick-walled part 2, light shield 3, and decorative part 1 are smoothed and bonded, allowing the three parts to be welded together in a single ultrasonic welding operation.

[0024] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, the decorative part 1 is provided with a long strip welding groove 11 which matches the thick wall protrusion 22 provided on the thick wall 2 to realize the welding function, and the decorative part 1 is provided with a positioning hole 12 which matches the positioning column 21 provided on the thick wall 2 to realize the positioning or limiting function.

[0025] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 and Figure 6 As shown, the thick wall 2 is provided with a welding groove 23 which matches the welding rib 35 provided on the shading member 3 to realize the welding function, the thick wall 2 is provided with a limiting hole 24 which matches the limiting column 34 provided on the shading member 3 to realize the positioning or limiting function, the thick wall 2 has a lens function and can refract light as needed, the thick wall 2 has a positioning screw hole 29 which matches the first positioning column 21 of the decorative member 1, and the positioning hole 12 matches the second positioning column 28 on the thick wall 2.

[0026] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the shading member 3 is an arc-shaped strip structure, and the shading member 3 is provided with a front shading portion 36 and a rear shading portion 37. The front shading portion 36 and the rear shading portion 37 are located on both sides of the welding groove 23, and the front shading portion 36 and the rear shading portion 37 are tightly fitted together with the thick wall 2.

[0027] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the thick wall 2 includes a first thick wall 25, a second thick wall 26 and a third thick wall 27, the decorative component 1 is provided with a first welding position 15, a second welding position 14 and a third welding position 13, the first thick wall 25 is installed to the first welding position 15 through a limiting structure, the second thick wall 26 is installed to the second welding position 14 through a limiting structure, and the third thick wall 27 is installed to the third welding position 13 through a limiting structure, the shading component 3 is provided with a first shading portion 31, a second shading portion 32 and a third shading portion 33, the first shading portion 31, the second shading portion 32 and the third shading portion 33 are synchronously installed to the first thick wall 25, the second thick wall 26 and the third thick wall 27 through a positioning structure, and the decorative component 1, the shading component 3, the first thick wall 25, the second thick wall 26 and the third thick wall 27 are installed together and ultrasonic welding is used to form an integrated structure.

[0028] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the decorative element 1 is provided with a first partition 16 and a second partition 17 , a first thick wall 25 and a second thick wall 26 are installed on both sides of the first partition 16 , and a second thick wall 26 and a third thick wall 27 are installed on both sides of the second partition 17 .

[0029] like Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, the decorative component 1 is provided with a mounting position and a positioning structure for a circuit board 4 to mount the circuit board 4 with a light source.

[0030] like Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, the decorative assembly also includes a first lampshade 5 and a second lampshade 6, which are ultrasonically welded together to form a one-piece structure and a cavity 7, which can accommodate other decorative components. The first and second lampshades 5, 6 are made of polycarbonate (PC), with a light transmittance greater than 90% and a thickness of 2 mm. Using an ultrasonic welder, the first and second lampshades 5, 6 are welded together from left to right or right to left to form a cavity 7. The welding parameters are: welding frequency of 20 kHz, welding time of 5 seconds, and welding pressure of 0.5 MPa. This design effectively simplifies the assembly process of the vehicle lamp decorative assembly, improving production efficiency, while also ensuring the sealing and waterproof performance of the vehicle lamp decorative assembly.

Claims

1. A decorative component for a vehicle lamp, comprising a decorative component (1), a thick wall (2) and a light shielding component (3), characterized in that: The thick wall (2) is located on the decorative piece (1), the shading piece (3) is located on the thick wall (2), a limiting structure is provided between the thick wall (2) and the decorative piece (1), a positioning structure is provided between the shading piece (3) and the thick wall (2), and the decorative piece (1), the thick wall (2) and the shading piece (3) are assembled together and then ultrasonically welded to form an integrated structure.

2. The decorative assembly for a vehicle lamp according to claim 1, characterized in that: The decorative piece (1) is provided with a long strip welding groove (11) which matches with the thick wall protrusion (22) provided on the thick wall (2) to realize the welding function.

3. The decorative assembly for a vehicle lamp according to claim 2, characterized in that: The decorative piece (1) is provided with a positioning hole (12) which matches with a positioning column (21) provided on the thick wall (2) to realize a positioning or limiting function.

4. The decorative assembly for a vehicle lamp according to claim 1, characterized in that: The thick wall (2) is provided with a welding protrusion (23) which matches with the welding rib (35) provided on the light shielding member (3) to realize the welding function.

5. The decorative assembly for a vehicle lamp according to claim 4, characterized in that: The thick wall (2) is provided with a limiting hole (24) which matches with a limiting column (34) provided on the light shielding member (3) to realize a positioning or limiting function.

6. The decorative assembly for a vehicle lamp according to claim 1, characterized in that: The shading member (3) is an arc-shaped strip structure.

7. The decorative assembly for a vehicle lamp according to claim 1, characterized in that: The thick wall (2) comprises a first thick wall (25), a second thick wall (26) and a third thick wall (27); the decorative component (1) is provided with a first welding position (15), a second welding position (14) and a third welding position (13); the first thick wall (25) is mounted to the first welding position (15) via a limiting structure; the second thick wall (26) is mounted to the second welding position (14) via a limiting structure; the third thick wall (27) is mounted to the third welding position (13) via a limiting structure; the shading component (3) is provided with a first A light shielding portion (31), a second light shielding portion (32) and a third light shielding portion (33), wherein the first light shielding portion (31), the second light shielding portion (32) and the third light shielding portion (33) are synchronously mounted on the first thick wall (25), the second thick wall (26) and the third thick wall (27) through a positioning structure, and the decorative component (1), the light shielding component (3), the first thick wall (25), the second thick wall (26) and the third thick wall (27) are mounted together and then ultrasonically welded to form an integrated structure.

8. The decorative assembly for a vehicle lamp according to claim 7, characterized in that: The decorative element (1) is provided with a first partition (16) and a second partition (17), the first thick wall (25) and the second thick wall (26) are mounted on both sides of the first partition (16), and the second thick wall (26) and the third thick wall (27) are mounted on both sides of the second partition (17).

9. The decorative assembly for a vehicle lamp according to any one of claims 1 to 8, characterized in that: The decorative element (1) is provided with a circuit board (4) mounting position and a positioning structure capable of mounting the circuit board (4) with a light source.

10. The decorative assembly for a vehicle lamp according to any one of claims 1 to 8, characterized in that: The decorative component further comprises a first lampshade (5) and a second lampshade (6); the first lampshade (5) and the second lampshade (6) are ultrasonically welded to form an integrated structure and a cavity (7).

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