Light-transmissive dual-shot injection molded interior trim strip

By designing a translucent dual-material injection-molded interior trim strip, the problem of insufficient material bonding was solved by utilizing a connecting structure and noise reduction software, achieving stable installation of the interior trim strip and stable illumination of the lights, thus improving the quality and atmosphere of the car interior.

CN117022137BActive Publication Date: 2026-08-04JIANGYIN U-SHINE DECORATIVE PARTS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGYIN U-SHINE DECORATIVE PARTS CO LTD
Filing Date
2023-07-03
Publication Date
2026-08-04

AI Technical Summary

Technical Problem

In existing automotive interior trim strips, the bonding strength between the two rigid injection-molded materials is not high, causing the bow-shaped structure to spring back, making it easy to fall off and produce abnormal noises. Furthermore, the light source of the light strip is unstable during vehicle operation.

Method used

Design a light-transmitting dual-material injection-molded interior trim strip, including a shell, a transparent light guide layer, a connecting structure, and noise-reducing software. The connecting structure strengthens the bond between the shell and the transparent light guide layer, and the noise-reducing software holds the light strip to prevent shaking. Light-transmitting cutouts and buckles are provided to achieve detachable connection.

Benefits of technology

It enhances the bonding strength of materials, prevents detachment and abnormal noise, ensures stable lighting, and improves the texture and atmosphere of the car interior.

✦ Generated by Eureka AI based on patent content.

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    Figure CN117022137B_ABST
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Abstract

The application discloses a light-transmitting double-injection-molding interior trim strip which comprises a shell, a light-emitting component, a connecting structure and noise reduction soft bodies, wherein the light-emitting component comprises a transparent light guide layer and a lamp strip; the shell and the transparent light guide layer are arc-shaped structures matched in shape; the transparent light guide layer is arranged in a cavity of the shell; the connecting structure is arranged on a contact surface of the shell and the transparent light guide layer and is used for strengthening the bonding strength of the shell and the transparent light guide layer; and the noise reduction soft bodies are arranged on the transparent light guide layer and clamp the lamp strip arranged between the noise reduction soft bodies. Through the design, the connecting structure strengthens the bonding force between the two hard materials of the shell and the transparent light guide layer, avoids abnormal sound caused by the separation of the shell and the transparent light guide layer due to insufficient bonding force, the noise reduction soft bodies arranged on the transparent light guide layer clamp the lamp strip which is subsequently arranged, prevent the light source from being unstable due to shaking of the lamp strip during driving of the automobile, and solve the problem of damage to the noble feeling of the automobile.
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Description

Technical Field

[0001] This invention belongs to the field of automotive interior design, and particularly relates to an automotive interior trim strip. Background Technology

[0002] With the continuous development of the automotive industry, consumers have increasingly higher requirements for car interiors. Among them, interior trim strips are an important component of car interiors. Various decorative strips can enhance the atmosphere of the car interior. The automotive interior industry has successively launched decorative strips with different functions and styles, such as interior trim strips that achieve a metallic texture through spray painting and ambient lighting interior trim strips with integrated light strips. With the increase in demand, the first step is to realize an interior trim strip with an arc-shaped structure that can transmit light through two materials through injection molding. However, due to the low bonding strength between the two different rigid injection molding materials, the shape of the arc structure will have a tendency to rebound, further weakening the bonding strength and making it easy to fall off, causing the interior trim strip to shake and make abnormal noises. In addition, due to the current limitations of injection molding demolding technology, the two materials cannot be fixed with an inverted structure. Besides the problem of bonding strength between the two rigid materials, there is also the technical problem of unstable light source during car driving after the light strip is installed. Summary of the Invention

[0003] The purpose of this invention is to provide a translucent dual-material injection molded interior trim strip to solve the problems of low bonding strength between two different rigid injection molding materials, the tendency of the arc-shaped structure to spring back, which further weakens the bonding strength and makes it easy to fall off, causing the interior trim strip to shake and make abnormal noises. In addition, due to the current limitations of injection molding demolding technology, the two materials cannot be fixed with an inverted structure. Besides the bonding strength problem between the two rigid materials, there is also the technical problem of unstable light source during vehicle operation after the light strip is installed.

[0004] To achieve the above objectives, the specific technical solution of the present invention is as follows: A translucent, dual-material injection-molded interior trim strip includes a housing, a light-emitting component, a connecting structure, and noise-reducing software. The light-emitting component includes a transparent light guide layer and a light strip. The housing and the transparent light guide layer have a matching arc-shaped structure. The transparent light guide layer is disposed within the cavity of the housing. The connecting structure is disposed on the contact surface between the housing and the transparent light guide layer to enhance the bonding strength between them. The noise-reducing software is disposed on the transparent light guide layer and clamps the light strip installed between the noise-reducing software components. The arc-shaped transparent light guide layer within the housing tends to spring back, causing a decrease in the bonding force on one of the two surfaces where the transparent light guide layer and the housing abut. This design strengthens the bonding force between the two rigid materials, the housing and the transparent light guide layer, preventing noise caused by the housing and transparent light guide layer separating due to insufficient bonding force. The noise-reducing software installed on the transparent light guide layer clamps the subsequently installed light strip, preventing the light strip from becoming unstable due to shaking while the car is in motion, thus protecting the car's premium feel.

[0005] Preferably, the housing includes an arc-shaped outer sidewall, an arc-shaped inner sidewall, and a top wall. The cavity is enclosed by the inner surfaces of the arc-shaped outer sidewall, the arc-shaped inner sidewall, and the top wall. The top wall has a light-transmitting perforated portion that provides a channel for the light emitted by the LED strip to pass through. The ends of the arc-shaped outer sidewall and the arc-shaped inner sidewall are evenly provided with clips for detachably connecting the housing to the vehicle body. With this design, the light-transmitting perforated portion of the housing's top wall provides space for the light emitted by the LED strip to pass through, and this design makes the light appear more neat and textured. The clips detachably connect the housing to the vehicle body, facilitating disassembly or replacement when needed.

[0006] Preferably, on both sides of the transparent light guide layer that abut against the arched outer and inner sidewalls, an adhesive reinforcement wall extends upward along the height direction of the arched outer and inner sidewalls away from the top wall to strengthen the bonding force between the transparent light guide layer and the housing. The height of the adhesive reinforcement wall is not higher than the height of the arched outer and inner sidewalls. Because the housing and the transparent light guide layer have an arched structure, while the transparent light guide layer rebounds and abuts against the arched outer sidewall of the housing, the connection between the transparent light guide layer and the arched inner sidewall is not tight enough. The adhesive reinforcement wall increases the contact area between the arched inner sidewall and the transparent light guide layer, thereby strengthening the bonding force.

[0007] Preferably, the bonding reinforcement wall includes a simplified bonding reinforcement structure, which is disposed on the abutting surface of the transparent light guide layer and the arc-shaped inner sidewall of the housing. The simplified bonding reinforcement structure is semi-conical. With this design, if the length of the interior trim extending from the inflection point of the arc-shaped structure is short, the loss of bonding force between the transparent light guide layer and the housing is not high. Only the simplified bonding reinforcement structure needs to extend on the transparent light guide layer, saving injection molding raw materials.

[0008] Preferably, the connecting structure includes a protrusion and a recess. The connecting structure is disposed on the contact surface where the inner arcuate sidewall and the transparent light guide layer abut against each other. On each contact surface of the inner arcuate sidewall and the transparent light guide layer, one side has the protrusion, and the other side has a corresponding recess. The number of protrusions and recesses corresponds one-to-one. This design, with its tortuous shape of the protrusions and recesses, further increases the contact area between the transparent light guide layer and the housing, increasing friction. The one-to-one correspondence between the protrusions and recesses ensures a tight connection.

[0009] Preferably, the protrusion and the recess are rectangular in shape to match. This design increases the contact area between the transparent light guide layer and the housing, increases friction, and prevents relative sliding between the housing and the transparent light guide layer in the horizontal direction.

[0010] Preferably, the protrusion and the recess are T-shaped to match each other. This further increases the contact area between the transparent light guide layer and the housing, and further increases the friction.

[0011] Preferably, the noise reduction software is evenly and oppositely disposed on the two bonding reinforcement walls, and the noise reduction software is arranged linearly with a gap reserved between the noise reduction software for clamping the light strip. Each noise reduction software includes a base and a software component, the software component being fixedly connected to the base, and the base being fixedly connected to the bonding reinforcement wall. With this design, the noise reduction software is mounted on the bonding reinforcement wall, and the light strip is mounted between the noise reduction software components and clamped by them. The noise reduction software buffers and limits the light strip's movement caused by the vehicle's movement, preventing the light strip from colliding with other parts and causing abnormal noise, as well as preventing light source instability due to movement.

[0012] Preferably, the connecting structure is arranged diverging from the inflection point of the bow-shaped inner wall and the bonding reinforcement wall towards both ends of the shell, and the number of protrusions and recesses in the connecting structure gradually increases as the connecting structure moves away from the inflection point of the bow-shaped structure. Since the rebound tendency of the transparent light guide layer's bow-shaped structure increases with distance from the inflection point, the bonding force between the transparent light guide layer and the bow-shaped inner wall weakens with distance from the inflection point. This design, by providing more protrusions and recesses in areas with weaker bonding force, ensures the bonding strength between the transparent light guide layer and the shell while also saving material.

[0013] Preferably, the transparent light guide layer is further provided with a convex lens structure and a concave lens structure for focusing and diverging the light source. The convex lens structure and the concave lens structure are alternately arranged on the side of the transparent light guide layer near the lamp strip. With this design, the light emitted from the transparent light guide layer will have a high-brightness and low-brightness zone effect, enhancing the ambiance of the car.

[0014] The beneficial effects of this invention are as follows: Through this design, the problem of insufficient bonding force between the two rigid materials, the shell and the transparent light guide layer, which makes them prone to falling off and shaking is first solved by the connection structure. Then, through the noise reduction software set on the transparent light guide layer, the light strip installed in the shell plays a role in limiting and buffering the light strip installed in the shell when it shakes. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the housing, transparent light guide layer, and light strip of the present invention; Figure 3 This is a partial truncated first-view structural diagram of the present invention; Figure 4 This is a schematic diagram of the partially truncated second-view structure of the present invention; Figure 5 This is a schematic diagram of the shell structure of the present invention; Figure 6 This is a schematic diagram of the transparent light guide layer structure from a first-view perspective according to the present invention; Figure 7 This is a schematic diagram of the transparent light guide layer structure from a second perspective according to the present invention; Figure 8 for Figure 3 Enlarged schematic diagram of the connection structure in section A; Figure 9 for Figure 3 Enlarged schematic diagram of the connection structure in section B; Figure 10 This is a schematic diagram of the T-connection structure of the present invention; Figure 11 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 12 This is a simplified schematic diagram of the bonding strength enhancement structure of the present invention; Figure 13 for Figure 1 Enlarged view of the chamfered structure in section C; Figure 14 This is a schematic diagram of the separation structure of the convex and concave parts of the connecting structure of the present invention; Figure 15 This is a schematic diagram of the mushroom-shaped connection structure of the present invention; The markings in the diagram are as follows: 1. Shell; 2. Cavity; 3. Light-emitting component; 4. Connecting structure; 5. Transparent light guide layer; 6. LED strip; 7. Noise reduction software; 8. Arched inner wall; 9. Arched outer wall; 10. Top wall; 11. Light-transmitting perforated part; 12. Buckle; 13. Recess; 14. Protrusion; 15. Bonding reinforcement wall; 16. Base; 17. Software; 18. Convex lens structure; 19. Concave lens structure; 20. Chamfered structure; 21. Simplified bonding reinforcement structure; 22. Rectangular structure; 23. T-shaped structure; 24. Mushroom-shaped structure. Detailed Implementation

[0016] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0017] like Figures 1 to 10 As shown, automotive interior design, as an important standard for evaluating car quality, can make in-car life more ritualistic, create a relaxed and pleasant atmosphere, enhance brand recognition, and highlight differentiation. In the process of automotive product iteration, the complexity requirements for interior trim strips have become increasingly higher, but current technological advancements have, to some extent, limited the refinement of interior trim strips. For example, there is a current demand for a translucent, arch-shaped interior trim strip made of two injection-molded materials (such as ABS and PC). Both injection-molded materials are rigid after molding, resulting in poor bonding between the two materials. The arch-shaped structure further amplifies this weakness in bonding. Furthermore, limitations in existing demolding processes prevent the bonding portion between the two materials from being made into an inverted structure. To address this need, this invention presents a translucent, two-material injection-molded interior trim strip.

[0018] Example 1

[0019] To solve the above-mentioned technical problems, the present invention provides a translucent dual-material injection-molded interior trim strip, including a housing 1 (the injection molding material of the housing 1 is ABS), a light-emitting component 3, a connecting structure 4, and a noise-reducing soft body 7. The light-emitting component 3 includes a transparent light guide layer 5 (the injection molding material of the transparent light guide layer 5 is PC) and a light strip 6. The housing 1 and the transparent light guide layer 5 are an arc-shaped structure with matching shapes. The transparent light guide layer 5 is disposed in the cavity 2 of the housing 1. The connecting structure 4 is disposed on the contact surface between the housing 1 and the transparent light guide layer 5 to enhance the bonding strength between the housing 1 and the transparent light guide layer 5. The noise-reducing soft body 7 is disposed on the transparent light guide layer 5 and clamps the light strip 6 installed between the noise-reducing soft body 7.

[0020] The housing 1 includes an arc-shaped outer sidewall 9, an arc-shaped inner sidewall 8, and a top wall 10. The cavity 2 is formed by the inner surfaces of the arc-shaped outer sidewall 9, the arc-shaped inner sidewall 8, and the top wall 10. The top wall 10 is provided with a light-transmitting perforated portion 11 that provides a light-transmitting channel for the light emitted by the light strip 6. The ends of the arc-shaped outer sidewall 9 and the arc-shaped inner sidewall 8 are uniformly provided with buckles 12 for detachably connecting the housing 1 to the vehicle body.

[0021] On the two sides of the transparent light guide layer 5 that abut against the outer arc-shaped wall 9 and the inner arc-shaped wall 8, a bonding force reinforcing wall 15 extends upward along the height direction of the outer arc-shaped wall 9 and the inner arc-shaped wall 8 away from the top wall 10 to strengthen the bonding force between the transparent light guide layer 5 and the housing 1. The height of the bonding force reinforcing wall 15 is not higher than the height of the outer arc-shaped wall 9 and the inner arc-shaped wall 8.

[0022] The connecting structure 4 includes a protrusion 14 and a recess 13. The connecting structure 4 is disposed on the contact surface where the inner sidewall 8 of the arc-shaped sidewall and the transparent light guide layer 5 abut against each other. On the contact surface where the inner sidewall 8 of the arc-shaped sidewall and the transparent light guide layer 5 abut against each other, one side is provided with the protrusion 14 and the other side is provided with the corresponding recess 13. The number of protrusions 14 and recesses 13 corresponds one-to-one.

[0023] The connecting structure 4 is arranged between the inner sidewall 8 of the arc and the reinforcing wall 15, and diverges towards both ends along the inflection point of the arc structure of the shell 1. The number of protrusions 14 and concave parts 13 in the connecting structure 4 gradually increases as the connecting structure 4 moves away from the inflection point of the arc structure.

[0024] The connecting structure 4 is only set on the inner sidewall 8 of the arc shape because the shell 1 and the transparent light guide layer 5 are both rigid materials. In plastic parts, the bonding force between two rigid materials is relatively weak. Therefore, the connecting structure 4 is set to strengthen the bonding force. Also, since the shell 1 and the transparent light guide layer 5 are both arc-shaped, the arc-shaped structure will have a tendency to rebound. Therefore, the bonding force between the transparent light guide layer 5 and the outer sidewall 9 of the arc shape of the shell 1 is sufficient. It is only necessary to set the connecting structure 4 between the inner sidewall 8 of the arc shape and the transparent light guide layer 5.

[0025] The manufacturing process of the above embodiment is as follows: The housing 1 is injection molded in the first injection molding process. A recess 13 for the connecting structure 4 is pre-formed on the inner arc-shaped sidewall 8 of the housing 1, and a light-transmitting perforated portion 11 provides a light transmission channel on the top wall 10. It also includes evenly distributed snap fasteners 12 on the inner and outer arc-shaped sidewalls 8 and 9. After the first injection molding, the housing 1 is placed in another mold for a second injection molding. The second injection molding forms the transparent light guide layer 5 inside the cavity 2 of the housing 1. Simultaneously, the protrusions 14 on the transparent light guide layer 5 are injection molded and engage with the recesses 13 of the housing 1. After the second injection molding is completed, the mold is changed again for a third injection molding. The third injection molding fixes the noise-reducing software 7 to the transparent light guide layer 5, ensuring that the noise-reducing software 7 is evenly positioned on the transparent light guide layer 5.

[0026] Example 2

[0027] The transparent light guide layer 5 is fixed to the two sides of the arc-shaped inner wall 8 and arc-shaped outer wall 9 of the housing 1. Along the height direction of the arc-shaped inner wall 8 and arc-shaped outer wall 9, a bonding force reinforcing wall 15 extends upward to strengthen the bonding force between the transparent light guide layer 5 and the housing 1. The height of the bonding force reinforcing wall 15 is not higher than the height of the arc-shaped inner wall 8 and arc-shaped outer wall 9. The connecting structure 4 includes a protrusion 14 and a recess 13. The connecting structure 4 is disposed on the contact surface where the arc-shaped inner wall 8 and the transparent light guide layer 5 abut against each other. On the contact surface where the arc-shaped inner wall 8 and the transparent light guide layer 5 abut against each other, one side is provided with a protrusion 14 and the other side is provided with a corresponding recess 13. The number of protrusions 14 and recesses 13 corresponds one-to-one.

[0028] The above embodiment is implemented as follows: the shell 1 is first injection molded, and a recess 13 for connecting structure 4 extends from the arc-shaped inner sidewall 8 of the shell 1. The extending direction of the recess 13 and the protrusion 14 is consistent with the direction of mold demolding and mold closing. Figure 7 Figure 8 The diagram shows the connection structure 4 with protrusion 14 and recess 13. Figure 8 Viewed from the direction of mold closing and demolding, the rectangular structure 22 has a protrusion 14 and a recess 13, which can meet the requirements for demolding from the top and bottom. Figure 10Looking at the T-shaped structure 23 from the direction of mold closing and demolding, the protrusion 14 and concave part 13 can also meet the requirements of upper and lower demolding. Figure 15 Viewed from the direction of mold closing and demolding, it has a mushroom-shaped structure 24. The extension direction of the protrusion and concave part of the above-mentioned connecting structure 4 is consistent with the mold demolding direction.

[0029] Understandably, the shape of the connecting structure 4 only needs to meet the requirement of allowing for demolding from both top and bottom, while increasing the contact area between the transparent light guide layer 5 and the housing 1, without other limitations. During the second injection molding, the bonding reinforcement wall 15 on the transparent light guide layer 5 is not simultaneously injection molded; instead, it is during the third injection molding that the bonding reinforcement wall 15 is injection molded, simultaneously fixing the noise reduction software 7 to the bonding reinforcement wall 15. The demolding of the housing 1 formed in the first injection molding, the transparent light guide layer 5 formed in the second injection molding, the bonding reinforcement wall 15 formed in the third injection molding, and the noise reduction software 7 can all be achieved from both top and bottom, without any difficulties in demolding technology.

[0030] Example 3

[0031] The noise reduction software 7 is evenly disposed on the two bonding force reinforcing walls 15. The noise reduction software 7 is arranged linearly as a whole, and a gap is reserved between the noise reduction software 7 for clamping the light strip 6. The noise reduction software 7 includes a base 16 and a software 17. The software 17 is fixedly connected to the base 16, and the base 16 is fixedly connected to the bonding force reinforcing wall 15.

[0032] The transparent light guide layer 5 is also provided with a convex lens structure 18 and a concave lens structure 19 for focusing and diverging the light source. The convex lens structure 18 and the concave lens structure 19 are arranged alternately on the side of the transparent light guide layer 5 near the light strip 6.

[0033] The above embodiment is implemented by first connecting the substrate 16 and the software 17 together by injection molding to form a separate component of the noise reduction software 7. During the third injection molding, the noise reduction software 7 is placed in a predetermined position, and the liquid injection molding material covers the substrate 16 and forms a bonding reinforcement wall 15. The convex lens structure 18 and the concave lens structure 19 on the transparent light guide layer 5 are formed in one step by a mold.

[0034] In a further embodiment, the connecting structure 4 is evenly distributed on the arc-shaped inner sidewall 8 and the bonding force reinforcing wall 15, and the number of recesses 13 and protrusions 14 decreases in a proportional sequence.

[0035] Example 4

[0036] The outer surface of the top wall 10 of the housing 1 is provided with a chamfered structure 20. A portion of the transparent light guide layer 5 protrudes from the hollowed-out light-transmitting part, but the protruding surface is lower than the outer surface of the top wall 10 of the housing 1. The light strip 6 is installed between the bonding reinforcement walls 15 provided with noise reduction software 7.

[0037] After injection molding, the shell will undergo a painting process. To achieve a metallic texture on the visible surface of the shell 1, two painting processes are required. The first is to spray a colored primer to determine the basic color of the shell 1, and then a thin layer of metallic paint is sprayed on the primer to achieve the metallic luster of various colors.

[0038] Example 5

[0039] like Figure 12 As shown, if the length of the interior trim extending from the inflection point of the bow-shaped structure is short, the loss of bonding force between the transparent light guide layer 5 and the shell 1 is not high. It is only necessary to extend a simplified bonding force strengthening structure 21 on the transparent light guide layer 5. The number of simplified bonding force strengthening structures 21 increases as they move further away from the inflection point of the bow-shaped structure.

[0040] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A light transmissible two-shot injection molded interior trim strip, characterized by, The device includes a housing (1), a light-emitting component (3), a connecting structure (4), and noise-reducing software (7). The light-emitting component (3) includes a transparent light guide layer (5) and a light strip (6). The housing (1) and the transparent light guide layer (5) are an arc-shaped structure that matches each other. The transparent light guide layer (5) is disposed in the cavity (2) of the housing (1). The connecting structure (4) is disposed on the contact surface between the housing (1) and the transparent light guide layer (5) to strengthen the bonding strength between the housing (1) and the transparent light guide layer (5). The noise-reducing software (7) is disposed on the transparent light guide layer (5) and forms a clamp for the light strip (6) installed between the noise-reducing software (7). The housing (1) includes an arc-shaped outer sidewall (9), an arc-shaped inner sidewall (8), and a top wall (10). The transparent light guide layer (5) abuts against the arc-shaped outer sidewall (9) and the arc-shaped inner sidewall (8). Along the height direction of the arc-shaped outer sidewall (9) and the arc-shaped inner sidewall (8) away from the top wall (10), a bonding force strengthening wall (15) extends upward to strengthen the bonding force between the transparent light guide layer (5) and the housing (1). The height of the bonding force strengthening wall (15) is not higher than the height of the arc-shaped outer sidewall (9) and the arc-shaped inner sidewall (8). The connecting structure (4) includes a protrusion (14) and a recess (13). The connecting structure (4) is disposed on the contact surface where the inner sidewall (8) and the transparent light guide layer (5) abut against each other. On the contact surface where the inner sidewall (8) and the transparent light guide layer (5) abut against each other, one side is provided with the protrusion (14) and the other side is provided with the recess (13). The number of protrusions (14) and recesses (13) corresponds one-to-one. The connecting structure (4) is arranged between the inner sidewall (8) of the arc and the reinforcing wall (15), and diverges towards both ends along the inflection point of the arc structure of the shell (1). The number of protrusions (14) and concave parts (13) in the connecting structure (4) gradually increases as the connecting structure (4) moves away from the inflection point of the arc structure.

2. The light transparent two-shot injection molded interior trim strip of claim 1, wherein, The cavity (2) is formed by the inner surfaces of the arc-shaped outer sidewall (9), the arc-shaped inner sidewall (8) and the top wall (10). The top wall (10) is provided with a light-transmitting hollow part (11) that provides a light-transmitting channel for the light emitted by the light strip (6). The ends of the arc-shaped outer sidewall (9) and the arc-shaped inner sidewall (8) are uniformly provided with buckles (12) for detachably connecting the housing (1) to the car body.

3. The translucent dual-material injection molded interior trim strip according to claim 1, characterized in that, The bonding reinforcement wall (15) includes a simplified bonding reinforcement structure (21), which is disposed on the abutting surface of the transparent light guide layer (5) and the arc-shaped inner wall (8) of the housing (1). The simplified bonding reinforcement structure (21) is semi-conical.

4. The translucent dual-material injection molded interior trim strip according to claim 1, characterized in that, The protrusion and the recess are rectangular structures that are adapted to each other.

5. The translucent dual-material injection molded interior trim strip according to claim 1, characterized in that, The protrusion and the recess are T-shaped structures that are adapted to each other.

6. The translucent dual-material injection molded interior trim strip according to claim 1, characterized in that, The noise reduction software (7) is evenly disposed on the two bonding force reinforcing walls (15). The noise reduction software (7) is arranged linearly as a whole, and a gap is reserved between the noise reduction software (7) for clamping the light strip (6). The noise reduction software (7) includes a base (16) and a software (17). The software (17) is fixedly connected to the base (16), and the base (16) is fixedly connected to the bonding force reinforcing wall (15).

7. The translucent dual-material injection molded interior trim strip according to claim 1, characterized in that, The transparent light guide layer (5) is also provided with a convex lens structure (18) and a concave lens structure (19) for focusing and diverging the light source. The convex lens structure (18) and the concave lens structure (19) are alternately arranged on the side of the transparent light guide layer (5) near the light strip (6).