Automobile rear combination lamp pseudo-tricolor mask

Abstract

The utility model discloses a kind of automobile rear combination lamp false tricolour face shield, belong to automobile lamp technical field.The face shield includes optical function area, stress buffer area and structure connection area, and optical function area is set on multiple light-transmitting areas of face shield.The stress buffer area is formed by the surface recess of face shield, and stress buffer area is adjacent to the setting of optical function area.Structure connection area is equipped with multiple, and structure connection area is arranged in stress buffer area.Structure connection area includes mounting post, and connecting cavity for connecting screw is arranged on mounting post, and mounting post includes first pipe body and second pipe body, and gap is reserved between first pipe body and second pipe body to form buffer groove, and buffer groove is arranged along the axial extension of mounting post.The face shield is absorbed screw locking stress by zoning design and buffer groove structure, and the light efficiency uniformity of optical function area can be avoided cracking and guaranteed connection area.

Description

Technical Field

[0001] This utility model belongs to the field of automotive lighting technology, and in particular relates to a false three-color mask for automotive rear combination lights. Background Technology

[0002] As automotive design has evolved, headlights have transformed from functional components into a core element of brand styling and a focal point of competitive differentiation. In recent years, designers have pursued minimalist, integrated, and dynamic lighting designs, giving rise to trends such as continuous light strips, ultra-thin lightsabers, and concealed light-emitting surfaces. These trends have placed core demands on headlight covers, including extremely compact structures, stringent cost control, and precise and uniform optical performance. The internal space of the headlight is drastically compressed, requiring all components to be highly integrated and connection points to be concealed.

[0003] In existing designs of automotive rear combination light covers, to meet styling requirements, a connecting bracket is often required for fixing the cover to the light body or other components. To control costs, the industry generally uses injection molding to integrally mold the connecting bracket with the cover body. The structural strength of the bracket is improved by increasing its thickness and adding reinforcing ribs at the base. During assembly, self-tapping screws are directly used to lock and fix the bracket through the mounting holes.

[0004] However, the existing solutions described above have insurmountable technical flaws. First, the radial expansion stress and axial preload generated when screws are screwed in create significant stress concentration at the root of the support, especially at the intersection of the ribs and the wall, making it highly susceptible to stress whitening, microcracks, or even direct fracture, resulting in poor connection reliability. Second, the increased local wall thickness to prevent cracking will cause shrinkage marks during injection molding and cooling. These shrinkage marks appear precisely in the optical area on the front of the mask, leading to obvious bright and dark spots or optical distortion, severely damaging optical uniformity and precise optical effects such as "pseudo-three colors," creating an inherent contradiction between structural strength and optical performance. Furthermore, if precise "pseudo-three color" microstructures are integrated in the vicinity of the support, molding stress and assembly stress will directly cause microstructure deformation or failure, making precise optical control impossible.

[0005] Therefore, how to guide, disperse, and absorb the stress of screw fastening through structural design while maintaining the low-cost advantage of one-piece injection molding of face masks, and prevent cracking in the connection area, has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0006] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0007] In order to overcome the shortcomings of the prior art, this utility model provides a false three-color mask for automotive rear combination lights.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a false tricolor mask for automotive rear combination lights, comprising an optical functional area, a stress buffer area, and a structural connection area; The optical functional area consists of multiple light-transmitting areas set on the mask; the stress buffer zone is formed by a recess on the surface of the mask and is set adjacent to the optical functional area; there are multiple structural connection areas, which are set within the stress buffer zone. The structural connection area includes a mounting column, which has a connecting cavity for connecting screws. The mounting column includes a first tube and a second tube, with a gap between the first tube and the second tube forming a buffer groove, which extends axially along the mounting column.

[0009] Furthermore, the buffer groove is axially inserted along the screw of the mounting post and is designed to be fully or partially through. When the screw is screwed in, the left and right parts of the mounting post can elastically expand along the buffer groove to release radial stress.

[0010] Furthermore, the stress buffer zone is provided with multiple arc-shaped ribs, which are asymmetrically arranged within the stress buffer zone, and the mounting column is located on the arc-shaped ribs.

[0011] Furthermore, adjacent arc-shaped ribs are arranged in a stepped manner within the stress buffer zone.

[0012] Furthermore, reinforcing ribs are provided on the side walls of the mounting column.

[0013] Furthermore, positioning posts are provided on the reinforcing ribs.

[0014] Furthermore, the optical functional area is made of PMMA material, and the stress buffer is made of ABS material.

[0015] The advantages of this utility model are: 1. This utility model divides the face mask into an optical functional area, a stress buffer zone, and a structural connection area. The structural connection area is located within the stress buffer zone, which is formed by a recess in the face mask surface and is adjacent to the optical functional area. Through the physical isolation of the stress buffer zone, the stress generated by screw fastening is confined within the structural connection area and the stress buffer zone, and will not be transmitted to the optical functional area. This fundamentally solves the problem in existing solutions where assembly stress directly affects the optical area, leading to deformation and failure of the "false three-color" microstructure, thus ensuring the precise optical efficiency of the optical functional area.

[0016] 2. The mounting post consists of a first tube and a second tube, with a gap between them forming an axially extending buffer groove. When the screw is screwed into the connection cavity, the buffer groove allows the mounting post to expand elastically outward evenly, absorbing the radial expansion stress and axial preload generated by the screw, preventing stress concentration at the root of the bracket, effectively preventing stress whitening, micro-cracks, or even breakage, and significantly improving connection reliability.

[0017] 3. This solution relies on the elastic deformation of the buffer groove to absorb stress, rather than increasing the thickness of the support root or arranging reinforcing ribs to improve strength. The optical functional area can maintain a uniform wall thickness, and there will be no shrinkage marks due to local wall thickness differences during injection molding and cooling. This avoids bright and dark spots or optical distortion on the front of the mask, ensuring the uniformity and refinement of the "pseudo-three-color" light effect.

[0018] 4. The entire mask can be injection molded in one piece without the need for additional parts or complex processes. The manufacturing process is simple, and while achieving crack resistance and high optical performance, it effectively controls manufacturing costs and meets the needs of mass production cost reduction.

[0019] 5. The structural connection area is arranged within the stress buffer zone formed by the recess of the mask surface. The connection mounting post does not protrude from the optical surface of the mask, and the connection point is hidden, which conforms to the minimalist and integrated design trend of automotive rear combination lights. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0021] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0022] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the false three-color mask for the rear combination light of the automobile of this utility model.

[0023] Figure 2 for Figure 1 Enlarged view of point A in the image.

[0024] The meanings of the reference numerals in the figure are as follows: 10. Optical functional area; 20. Stress buffer zone; 21. Arc-shaped rib; 22. Reinforcing rib; 23. Positioning post; 30. Structural connection area; 31. Mounting post; 311. First tube body; 312. Second tube body; 32. Buffer groove; 33. Connection cavity. Detailed Implementation

[0025] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0026] It should also be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0027] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0028] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0029] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0030] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] like Figure 1-2 As shown, a false tri-color rear combination lamp cover for automobiles includes an optical functional area 10, a stress buffer zone 20, and a structural connection area 30. The optical functional area 10 consists of multiple light-transmitting areas on the cover. The stress buffer zone 20 is formed by a recess in the surface of the cover and is adjacent to the optical functional area 10. Multiple structural connection areas 30 are provided within the stress buffer zone 20. The structural connection area 30 includes a mounting post 31 with a connecting cavity 33 for connecting screws. The mounting post 31 includes a first tube 311 and a second tube 312, with a gap between the first tube 311 and the second tube 312 forming a buffer groove 32 extending axially along the mounting post 31. Dividing the cover into three functional areas—the optical functional area 10, the stress buffer zone 20, and the structural connection area 30—not only decouples the structural and optical performance but also provides an independent release channel for assembly stress.

[0032] The buffer groove 32 is axially inserted along the screw of the mounting post 31, either fully or partially through it. When the screw is screwed in, the left and right parts of the mounting post 31 can elastically expand along the buffer groove 32 to release radial stress. During actual assembly, when the screw penetrates into the connecting cavity 33 of the mounting post 31, as the thread engagement depth in the connecting cavity 33 increases, the mounting post 31 is subjected to radial expansion force. The first tube 311 and the second tube 312 undergo slight displacement along the buffer groove 32, allowing the stress to be absorbed in the form of elastic deformation rather than being transmitted to the surrounding wall surface. This process effectively avoids the local stress peaks caused by rigid constraints in traditional structures.

[0033] Multiple arc-shaped ribs 21 are provided within the stress buffer zone 20, and these ribs 21 are asymmetrically arranged within the stress buffer zone 20. The mounting post 31 is located on the arc-shaped ribs 21. Adjacent arc-shaped ribs 21 are arranged in a stepped manner within the stress buffer zone 20. Since the stress buffer zone 20 is formed by an inward indentation from the mask surface, its geometry itself constitutes a stress barrier. Even if the buffer groove 32 undergoes slight plastic deformation under extreme conditions, the deformation area is still confined within the recessed area and will not affect the adjacent optical functional area 10. At the same time, the asymmetrically arranged arc-shaped ribs 21 further disperse the stress propagation path, and the stepped arrangement enhances the buffer zone's resistance to deformation in different directions, ensuring that the mounting post 31 remains stable under multi-directional loads.

[0034] The mounting post 31 has a reinforcing rib 22 on its side wall, and a positioning post 23 is mounted on the reinforcing rib 22. The reinforcing rib 22 on the side wall of the mounting post 31 not only improves the axial stiffness, but also provides a stable support foundation for the positioning post 23. The positioning post 23 can cooperate with the guide hole on the lamp housing in the early stage of assembly to achieve the pre-positioning of the mask, reducing the additional assembly stress caused by forcibly aligning the hole.

[0035] The optical functional area 10 is made of PMMA material, and the stress buffer zone 20 is made of ABS material. The use of PMMA material for the optical functional area 10 ensures high light transmittance and excellent surface replicability; the use of ABS material for the stress buffer zone 20 balances toughness and injection molding fluidity, which is beneficial for the complete molding of complex recessed structures.

[0036] By leveraging the synergistic effect of the aforementioned features, the mask maintains the integrity of the optical surface and consistency of light efficiency while meeting the requirements for high-strength connections, thus resolving the core contradiction in existing technologies where structural reliability and optical performance are difficult to balance. In the actual injection molding process, since the optical functional area 10 and the stress buffer zone 20 are made of different materials, they can be integrally molded using two-color injection molding or insert injection molding processes. Specifically, PMMA material is preferentially injected into the cavity of the optical functional area 10, followed by ABS material injected into the stress buffer zone 20 and the structural connection area 30. The two are firmly bonded at the interface through a reasonable overlapping structure, ensuring both the functional characteristics of the partitioned areas and avoiding the risk of delamination.

[0037] During assembly, the face mask is fastened from back to front to the corresponding position on the lamp housing. The positioning post 23 is first inserted into the positioning hole on the lamp housing to complete the initial alignment. Then, the screw passes through the mounting hole on the lamp housing and is screwed into the connecting cavity 33 of the mounting post 31. As the screw is gradually tightened, the first tube 311 and the second tube 312 on both sides of the buffer groove 32 expand outward slightly in sync. The arc-shaped rib 21 then undergoes elastic deformation, converting concentrated stress into distributed bending strain energy, effectively suppressing the risk of local cracking. The entire fastening process does not require additional pre-pressure or the use of shims, simplifying the assembly process.

Claims

1. A false tri-color mask for automotive rear combination lights, characterized in that: It includes an optical functional area (10), a stress buffer zone (20), and a structural connection area (30); The optical functional area (10) is a plurality of light-transmitting areas set on the mask; the stress buffer zone (20) is formed by a recess in the surface of the mask, the stress buffer zone (20) is arranged adjacent to the optical functional area (10), and the structural connection area (30) is provided in a plurality of places, the structural connection area (30) is located in the stress buffer zone (20); The structural connection area (30) includes a mounting post (31), which has a connecting cavity (33) for connecting screws. The mounting post (31) includes a first tube (311) and a second tube (312). A gap is maintained between the first tube (311) and the second tube (312) to form a buffer groove (32). The buffer groove (32) extends along the axial direction of the mounting post (31).

2. The false tri-color mask for automotive rear combination lights according to claim 1, characterized in that: The buffer groove (32) is inserted along the screw axis of the mounting post (31) and is configured to be fully or partially through. When the screw is screwed in, the left and right parts of the mounting post (31) can elastically expand along the buffer groove (32) to release radial stress.

3. The false tri-color mask for automotive rear combination lights according to claim 1, characterized in that: The stress buffer zone (20) is provided with a plurality of arc-shaped ribs (21), which are asymmetrically arranged in the stress buffer zone (20), and the mounting column (31) is provided on the arc-shaped ribs (21).

4. The false tri-color mask for automotive rear combination lights according to claim 3, characterized in that: The adjacent arc-shaped ribs (21) are arranged in a stepped manner within the stress buffer zone (20).

5. The false tri-color mask for automotive rear combination lights according to claim 1, characterized in that: The mounting column (31) is provided with reinforcing ribs (22) on its side wall.

6. The false tri-color mask for automotive rear combination lights according to claim 5, characterized in that: The reinforcing rib (22) is provided with a positioning post (23).

7. The automotive rear combination light false tricolor mask according to claim 1, characterized in that: The optical functional area (10) is made of PMMA material, and the stress buffer (20) is made of ABS material.

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