A roof trim assembly

Abstract

This application relates to the field of roof trim technology, and more specifically to a roof trim assembly, comprising: an inner frame, an outer frame, and a first elastic arm. The invention provides a waist-shaped groove on the inner frame to facilitate the connector's adaptation to offset in the length direction of the mounting pin. By connecting the inner and outer frames with the first elastic arm, when the mounting pin is skewed in the width direction of the water channel or misaligned relative to the bottom wall of the water channel, the elastic deformation of the first elastic arm can compensate for the misalignment of the mounting pin in the width direction and the misalignment in the height direction. By integrally installing the connector with the trim body, the number of components is reduced, effectively improving the efficiency of OEMs in assembling roof trim, and facilitating transportation and storage.

Description

Technical Field

[0001] This application relates to the field of roof trim technology, and more specifically to a roof trim assembly. Background Technology

[0002] The roof trim is installed within the roof drainage channel. Existing roof drainage channels have multiple mounting pins welded into them. Each mounting pin includes a post and a cap, with the maximum radial dimension of the cap being larger than the maximum radial dimension of the post. Due to welding errors, these mounting pins exhibit dimensional deviations in the height, length, and width directions of the drainage channel. Current installation methods involve individually installing connectors at the corresponding mounting pins, fine-tuning the connectors' positions in the length and width directions to accommodate the actual mounting pin locations, and then engaging the trim body with each connector to install the trim body within the roof drainage channel.

[0003] To allow for fine-tuning of the connector to accommodate the actual position of the mounting pin, existing patent document (CN224562451U) discloses a roof trim snap-fit ​​assembly, as shown in the accompanying drawings. Figure 3 It is evident that the middle section of the connector has a slot with wavy, inclined side walls and an open end. During actual installation, the mounting pin is first inserted through the opening of the slot, and then moved away from the slot opening until one side of the connector abuts against the wall of the water guide channel. The mounting pin is then positioned in the corresponding position within the slot and limited by the wavy side walls. Clearly, the adjustment of the mounting pin's length and width is achieved through the inclined slot. However, in the above embodiment, the connectors need to be fixed to the vehicle body one by one before the decorative strip body is installed. Since the OEM needs to use two types of components during installation, this makes assembly inconvenient.

[0004] Therefore, there is a need for a roof trim assembly that is easier to assemble and can adapt to deviations in height, length, and width of the mounting pins. Summary of the Invention

[0005] The main objective of this application is to provide a roof trim assembly, disposed within a water channel on the roof of a vehicle body. The water channel contains multiple mounting pins, which are fixedly connected to the vehicle body. The roof trim assembly includes a trim body and multiple connectors. The bottom surface of the trim body has a slot. The connectors are arranged along the length of the trim body within the slot and engage with the trim body. Each connector includes an outer frame, an inner frame, and a first elastic arm. The outer frame has a first hollow cavity, and the inner frame is placed within the first hollow cavity. Both ends of the first elastic arm are connected to the outer frame and the inner frame, respectively. The inner frame has a waist-shaped groove through which the mounting pins pass, extending along the length of the inner frame. The inner frame includes two second elastic arms. The second elastic arms are spaced apart along the width direction of the outer frame, and the two second elastic arms are respectively located on both sides of the waist-shaped groove. When the two second elastic arms move in opposite directions, the width dimension of the waist-shaped groove increases accordingly. This application provides a waist-shaped groove on the inner frame to facilitate the connector to adapt to the offset in the length direction of the mounting nail. By connecting the inner frame and the outer frame with the first elastic arm, when the mounting nail is skewed in the width direction of the water guide groove or the mounting nail is skewed relative to the bottom wall of the water guide groove, the elastic deformation of the first elastic arm can compensate for the positional deviation of the mounting nail in the width direction and the skew in the height direction of the mounting nail. By installing the connector and the trim body as a whole, the number of components is reduced, effectively improving the efficiency of the OEM in assembling the roof trim, and facilitating transportation and storage.

[0006] To achieve at least one of the above-mentioned objectives, this application provides a roof trim assembly disposed within a water channel on the top of a vehicle body. The water channel contains a plurality of mounting pins, which are fixedly connected to the vehicle body. The roof trim assembly includes: The trim body comprises a main body and multiple connectors. The bottom surface of the trim body has a slot. The connectors are arranged in the slot along the length of the trim body and engage with the trim body. Each connector includes an outer frame, an inner frame, and a first elastic arm. The outer frame has a first hollow cavity. The inner frame is placed inside the first hollow cavity, and the two ends of the first elastic arm are respectively connected to the outer frame and the inner frame. The inner frame has a waist-shaped groove through which the mounting pin passes. The waist-shaped groove extends along the length of the inner frame. The inner frame includes two second elastic arms. The two second elastic arms are arranged at intervals along the width of the outer frame, and the two second elastic arms are located on both sides of the waist-shaped groove. When the two second elastic arms move in opposite directions, the width of the waist-shaped groove increases accordingly.

[0007] In one or more embodiments of this application, the inner frame further includes a sealing arm for sealing the two first elastic arms, the sealing arm and the first elastic arms together forming the inner frame.

[0008] In one or more embodiments of this application, the inner frame further includes a sealing arm for sealing the two first elastic arms, the sealing arm and the first elastic arms together forming the inner frame.

[0009] In one or more embodiments of this application, the first elastic arm is in the shape of a straight strip, and both ends of each first elastic arm are connected to the inner frame and the outer frame, respectively.

[0010] In one or more embodiments of this application, the first elastic arm is arranged horizontally.

[0011] In one or more embodiments of this application, the first elastic arm is arranged at an angle.

[0012] In one or more embodiments of this application, the first elastic arm is wavy, and both ends of the first elastic arm are connected to the inner frame and the outer frame, respectively.

[0013] In one or more embodiments of this application, the first elastic arm is curved, and both ends of each first elastic arm are connected to the inner frame and the outer frame, respectively.

[0014] In one or more embodiments of this application, the first elastic arm is V-shaped, and both ends of each first elastic arm are connected to the inner frame and the outer frame, respectively.

[0015] In one or more embodiments of this application, the two first elastic arms have a protrusion on their facing sides, the protrusion has a notch on the side of the protrusion near the trim body in the height direction, the two notches together form the waist-shaped groove, the protrusion has a guide slope on the side of the protrusion away from the trim body in the height direction, and the distance between the ends of the two notches is less than the maximum radial dimension of the column.

[0016] In this embodiment, firstly, the inner frame has a waist-shaped groove to facilitate the connector to adapt to the offset in the length direction of the mounting nail. In addition, the inner frame and the outer frame are connected by a first elastic arm. When the mounting nail is skewed in the width direction of the water channel or the mounting nail is skewed relative to the bottom wall of the water channel, the elastic deformation of the first elastic arm can compensate for the positional deviation of the mounting nail in the width direction and the skew in the height direction of the mounting nail. Secondly, by installing the connector and the trim body as a single unit, the number of components is reduced, which effectively improves the efficiency of the OEM in assembling the roof trim and facilitates transportation and storage. Attached Figure Description

[0017] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein: Figure 1The illustration shows a structural schematic diagram of a roof trim assembly according to this application; Figure 2 The diagram shows the structure when the connector is placed inside the water guide channel; Figure 3 The figure shows a schematic diagram of the connector structure in the first embodiment; Figure 4 The figure shows a schematic diagram of the connector structure in the second embodiment; Figure 5 The figure shows a schematic diagram of the connector structure in the third embodiment; Figure 6 The figure shows a schematic diagram of the connector structure in the fourth embodiment; Figure 7 The figure shows a schematic diagram of the connector in the fifth embodiment; Figure 8 The figure shows a schematic diagram of the connector structure in the sixth embodiment; Figure 9 The diagram illustrates the structure of the connector in the seventh embodiment; Figure 10 The figure shows a schematic diagram of the connector structure in the eighth embodiment; Figure 11 The figure shows a structural schematic diagram of the connector in the ninth embodiment; Figure 12 The figure shows a schematic diagram of the connector in the tenth embodiment; Figure 13 The figure shows a schematic diagram of the connector in the eleventh embodiment; Figure 14 The figure shows a schematic diagram of the connector in the twelfth embodiment; Figure 15 The figure shows a schematic diagram of the connector in the thirteenth embodiment; Figure 16 The figure shows a schematic diagram of the connector structure in the fourteenth embodiment; Figure 17 The figure shows a schematic diagram of the connector structure in the fifteenth embodiment; Figure 18 The figure shows a cross-sectional view of a roof trim assembly according to this application at a certain angle; Figure 19 The diagram shows... Figure 2 A magnified view of a portion of point C. Detailed Implementation

[0018] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.

[0019] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0020] While ordinal numbers such as "first," "second," etc., will be used to describe various components, this does not limit which components are used. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the inventive concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0022] Indicative roof trim assembly, for reference Figures 1 to 19 According to any preferred embodiment of the present invention, a roof trim assembly is disposed in a water channel 90 on the top of the vehicle body. The water channel 90 is provided with a plurality of mounting pins 91, which are fixedly connected to the vehicle body. The roof trim assembly includes a trim body 10 and a plurality of connectors 20.

[0023] Specifically, in any embodiment of this application, such as Figure 3As shown, the bottom surface of the trim body 10 has a slot 101. The connector 20 is arranged in the slot 101 along the length of the trim body 10 and engages with the trim body 10. The connector 20 includes an outer frame 201, an inner frame 202, and a first elastic arm 203. The outer frame 201 has a first hollow cavity 2011. The inner frame 202 is placed in the first hollow cavity 2011, and the two ends of the first elastic arm 203 are respectively connected to the outer frame 201 and the inner frame 202. The inner frame 202 has a waist-shaped groove 2023 through which the mounting pin 91 passes. The waist-shaped groove 2023 extends along the length direction of the inner frame 202. The inner frame 202 includes two second elastic arms 2021. The two second elastic arms 2021 are arranged at intervals along the width direction of the outer frame 201, and the two second elastic arms 2021 are respectively located on both sides of the waist-shaped groove 2023. When the two second elastic arms 2021 move in opposite directions, the width dimension of the waist-shaped groove 2023 increases accordingly.

[0024] More specifically, in any embodiment of this application, such as Figure 19 As shown, the mounting pin 91 includes a column body 911 and a column cap 912. The maximum radial dimension of the column cap 912 is greater than the maximum radial dimension of the column body 911. The width dimension of the waist-shaped groove 2023 is less than the maximum radial dimension of the column cap 912, and the width dimension of the waist-shaped groove 2023 is greater than the maximum radial dimension of the column body 911.

[0025] It should be noted that each of the connectors 20 is installed on the trim body 10. Then, the trim body 10 is pressed onto the vehicle body. It should be pointed out that at this time, each of the multiple connectors 20 arranged along the length of the trim body 10 corresponds to a mounting pin 91. It should be noted that the mounting pin 91 has offsets in height, length, and width due to welding positioning, and the offset distance is generally less than 3mm. When the trim body 10 is pressed onto the vehicle body, the mounting pin 91 contacts the two second elastic arms 2021 of the inner frame 202. As the trim body 10 moves further downward, the pillar cap 912 contacts the two second elastic arms 2021, causing the two second elastic arms 2021 to move in opposite directions. At this time, the two second elastic arms 20... The spacing of 21, that is, the maximum width of the waist-shaped groove 2023 is greater than the maximum width of the column cap 912, so that the column cap 912 can pass through the waist-shaped groove 2023, thereby realizing the limiting and fixing of the connector 20 in the height direction; subsequently, since the waist-shaped groove 2023 is arranged along the length direction of the inner frame 202, the connector 20 can move in the length direction relative to the fixed position of the column 911 to adapt to the position of the column 911 in the length direction. It should also be noted that during the process of the column cap 912 passing through the waist-shaped groove 2023, since the position of the mounting pin 91 in the width direction of the water guide channel 90 is deflected, the first elastic arm 203 performs elastic deformation and compensates for the deflection of the mounting pin 91 in the width direction of the water guide channel 90.

[0026] It should be emphasized that this application has two innovative points compared with the prior art: First, in the prior art, the connectors 20 are first snapped onto the corresponding mounting pins 91 on the vehicle body one by one. After each connector 20 is snapped onto the corresponding mounting pin 91, the trim body 10 is then snapped onto each connector 20. This makes the assembly efficiency of the OEM low and increases the overall production cost. In addition, in the prior art, the connectors 20 and the trim body 10 are two independent components. In addition to being more complicated in the assembly of the whole machine, they are also more inconvenient in storage and transportation. Moreover, when the connectors 20 have large tolerance errors due to various factors, the trim body 10 is difficult to snap onto the mounting pins 91 and it is difficult to install the trim body 10 on the vehicle body. This application, by shipping the connector 20 and the trim body 10 as a single unit, allows OEMs to simply snap the roof trim assembly directly into the vehicle's water channel 90 during assembly. Compared to existing technologies that require installing each connector 20 individually before installing the trim body 10, this significantly reduces assembly time and effectively lowers assembly costs for OEMs in mass production. Furthermore, the integrated connector 20 and trim body 10 facilitate transportation and storage, and prevent mismatches between different models of connector 20 and trim body 10. It is also worth noting that for manufacturers of the roof trim assembly, the assembly efficiency is higher when installing each connector 20 onto the trim body 10, as the connector 20 is not subjected to the force of the mounting pin 91 during actual installation, allowing for easier engagement with the trim body 10.

[0027] It should also be emphasized that the technical problem that this application actually aims to solve is: when the roof trim assembly is installed on the vehicle's water channel 90, the inner frame 202 can make slight adjustments in length, width, and height relative to the outer frame 201 according to the actual position of the mounting pin 91, so as to solve the actual positional deviation of the mounting pin 91 and adapt to the installation; and the above technical problem is solved by the arrangement of the waist-shaped groove 2023 and the first elastic arm 203.

[0028] Furthermore, in any embodiment of this application, such as Figure 3 As shown, the inner frame 202 also includes a sealing arm 2022 for sealing the two first elastic arms 203, and the sealing arm 2022 and the first elastic arms 203 together form the inner frame 202.

[0029] Additionally, in any embodiment of this application, such as Figure 3As shown, the outer frame 201 includes two horizontal segments 2012 and two vertical segments 2013. The two ends of each horizontal segment 2012 are respectively connected to the two vertical segments 2013, and the two ends of the two vertical segments 2013 are respectively connected to the two horizontal segments 2012. The horizontal segments 2012 and the vertical segments 2013 together form the outer frame 201.

[0030] Furthermore, in the first to fifth embodiments of this application, as Figures 3 to 7 As shown, the first elastic arm 203 is in the shape of a straight strip, and the two ends of each first elastic arm 203 are respectively connected to the inner frame 202 and the outer frame 203.

[0031] Specifically, in the first embodiment of this application, such as Figure 3 As shown, the first elastic arm 203 is arranged horizontally.

[0032] More specifically, in the first embodiment, as Figure 3 As shown, there are two first elastic arms 203, and the two first elastic arms 203 are located at both ends of the inner frame 202. The two ends of each first elastic arm 203 are connected to the sealing arm 2022 and the vertical section 2013, respectively. The first elastic arm 203 is arranged parallel to the horizontal section 2012 and is located in the middle section of the vertical section 2013.

[0033] In the second to fifth embodiments of this application, as Figures 4 to 7 The first elastic arm 203 shown is arranged at an angle.

[0034] Specifically, in the second embodiment, such as Figure 4 As shown, there are two first elastic arms 203. The two first elastic arms 203 are located at both ends of the inner frame 202. The two ends of each first elastic arm 203 are connected to the sealing arm 2022 and the vertical section 2013, respectively. The ends of the two first elastic arms 203 away from the inner frame 202 are located on both sides of the outer frame 201.

[0035] In the third embodiment, as Figure 5 As shown, there are four first elastic arms 203. One end of each first elastic arm 203 is connected to one of the four corners of the inner frame 202, and the other end of each first elastic arm 203 is connected to the corresponding horizontal segment 2012. The first elastic arms 203 are arranged in parallel.

[0036] In the fourth embodiment, as Figure 6As shown, there are two first elastic arms 203, and the two first elastic arms 203 are located on both sides of the inner frame 202 respectively. The end of each first elastic arm 203 facing away from the inner frame 202 is connected to the corresponding horizontal segment 2012.

[0037] In the fifth embodiment, as Figure 7 As shown, there are four first elastic arms 203. One end of each first elastic arm 203 is connected to one of the four corners of the inner frame 202, and the other end of each first elastic arm 203 is connected to the corresponding horizontal segment 2012. The two first elastic arms 203 located on the same side of the inner frame 202 have opposite tilt directions.

[0038] Furthermore, in the sixth embodiment of this application, as Figure 8 As shown, the first elastic arm 203 is wavy, and the two ends of each first elastic arm 203 are respectively connected to the inner frame 202 and the outer frame 203.

[0039] More specifically, there are two first elastic arms 203, and the two ends of the first elastic arms 203 are respectively connected to the sealing arm 2022 and the vertical segment 2013.

[0040] In the seventh to eleventh embodiments of this application, as Figures 9 to 13 As shown, the first elastic arm 203 is curved, and both ends of each first elastic arm 203 are connected to the inner frame 202 and the outer frame 201, respectively.

[0041] Specifically, in the seventh embodiment, as Figure 9 As shown, there are two first elastic arms 203, and the two ends of each first elastic arm 203 are connected to the sealing arm 2022 and the vertical segment 2013, respectively.

[0042] In the eighth embodiment, as Figure 10 As shown, there are two first elastic arms 203, and the two ends of each first elastic arm 203 are connected to the second elastic arm 2021 and the horizontal segment 2012 respectively, and the curved parts of the two first elastic arms 203 are facing the waist-shaped groove 2023.

[0043] In the ninth embodiment, as Figure 11 As shown, there are two first elastic arms 203, and the two ends of each first elastic arm 203 are connected to the second elastic arm 2021 and the horizontal segment 2012 respectively, and the curved parts of the two first elastic arms 203 are facing away from the waist-shaped groove 2023.

[0044] In the tenth embodiment, as Figure 12 As shown, there are four first elastic arms 203. One end of each first elastic arm 203 is connected to one of the four corners of the inner frame 202, and the other end of each first elastic arm 203 is connected to the horizontal section 2012. The curved ends of the two first elastic arms 203 located on the same side of the inner frame 202 are both facing the waist-shaped groove 2023.

[0045] In the eleventh embodiment, as Figure 13 As shown, there are four first elastic arms 203. One end of each first elastic arm 203 is connected to one of the four corners of the inner frame 202, and the other end of each first elastic arm 203 is connected to the horizontal section 2012. The curved ends of the two first elastic arms 203 located on the same side of the inner frame 202 are both facing away from the waist-shaped groove 2023.

[0046] Furthermore, in embodiments twelve to fifteen of this application, as Figures 14 to 17 As shown, the first elastic arm 203 is V-shaped, and the two ends of each first elastic arm 203 are respectively connected to the inner frame 202 and the outer frame 201.

[0047] Specifically, in the twelfth embodiment, such as Figure 14 As shown, there are two first elastic arms 203, and the two ends of each first elastic arm 203 are connected to the second elastic arm 2021 and the horizontal segment 2012 respectively, and the curved parts of the two first elastic arms 203 are facing the waist-shaped groove 2023.

[0048] In the thirteenth embodiment, as Figure 15 As shown, there are two first elastic arms 203, and the two ends of each first elastic arm 203 are connected to the second elastic arm 2021 and the horizontal segment 2012 respectively, and the curved parts of the two first elastic arms 203 are facing away from the waist-shaped groove 2023.

[0049] In the fourteenth embodiment, as Figure 16 As shown, there are four first elastic arms 203. One end of each first elastic arm 203 is connected to one of the four corners of the inner frame 202, and the other end of each first elastic arm 203 is connected to the horizontal section 2012. The curved ends of the two first elastic arms 203 located on the same side of the inner frame 202 are both facing the waist-shaped groove 2023.

[0050] In the fifteenth embodiment, as Figure 17As shown, there are four first elastic arms 203. One end of each first elastic arm 203 is connected to one of the four corners of the inner frame 202, and the other end of each first elastic arm 203 is connected to the horizontal section 2012. The curved ends of the two first elastic arms 203 located on the same side of the inner frame 202 are both facing away from the waist-shaped groove 2023.

[0051] Furthermore, in any embodiment of this application, such as Figure 19 As shown, the two first elastic arms 203 have facing ridges 2031 on their opposite sides. The ridges 2031 have notches 20311 on their side near the trim body 10 in the height direction. The two notches 20311 together form the waist-shaped groove 2023. Figure 1 As shown, the protrusion 2031 has a guide slope 20312 on the side facing away from the trim body 10 in the height direction, and the distance between the ends of the two notches 20311 is less than the maximum radial dimension of the column 911.

[0052] It should be noted that when the roof trim assembly is pressed down, the pillar cap 912 contacts the guide ramp 20312, causing the two first elastic arms 203 to elastically deform in opposite directions. Additionally, the ends of the waist-shaped groove 2023 narrow, allowing the mounting pin 91 to move only within the waist-shaped groove 2023. Furthermore, after the roof trim assembly is connected to the mounting pin 91, the pillar 911 passes through the gap between the two protrusions 2031, and the pillar cap 912 is located within the waist-shaped groove 2023. Because the distance between the ends of the two notches 20311 is less than the maximum radial dimension of the pillar 911, the connector 20 has a limited range of adjustment relative to the mounting pin 91 along the length of the water channel 90.

[0053] Furthermore, to specifically achieve the connection between the connector 20 and the trim body 10, in any embodiment of this application, such as... Figure 18 As shown, both sides of the slot 101 have inwardly extending ribs 1011, and one side of the connector 20 has a sliding groove 2014, as... Figure 3 As shown, the other side of the connector 20 has a third elastic arm 2015. The third elastic arm 2015 is convex arc-shaped, and both ends of the third elastic arm 2015 are connected to the horizontal segment 2012. When the connector 20 is connected to the trim body 10, one of the extension ribs 1011 extends into the groove 2014, and the other extension rib 1011 contacts the third elastic arm 2015 and undergoes elastic deformation.

[0054] Furthermore, in any embodiment of this application, such as Figure 1As shown, the outer frame 201 also has a first limiting rib 2016 and a second limiting rib 2017. Both ends of the outer frame 201 have the first limiting rib 2016 and the second limiting rib 2017, and the first limiting rib 2016 and the second limiting rib 2017 are both arranged at an angle in the height direction. The first limiting rib 2016 abuts against the trim body 10. When the roof trim assembly is located in the water guide groove 90, the second limiting rib 2017 abuts against the bottom wall of the water guide groove 90.

[0055] Furthermore, in any embodiment of this application, the material of the connector 20 includes, but is not limited to, PA6 plastic.

[0056] In addition, in any embodiment of this application, when the post cap 912 passes through the waist-shaped groove 2023, the pull-out force that separates the connector 20 from the mounting pin 91 is ≥100N.

[0057] In summary, the roof trim assembly described in the embodiments of this application is explained, which provides advantages such as easier assembly and the ability to adapt to deviations in height, length, and width of the mounting nails.

[0058] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from these principles.

Claims

1. A roof trim assembly, disposed within a water channel on the top of a vehicle body, wherein the water channel is provided with a plurality of mounting pins, the mounting pins being fixedly connected to the vehicle body, characterized in that: The roof trim assembly includes The trim body comprises a main body and multiple connectors. The bottom surface of the trim body has a slot. The connectors are arranged in the slot along the length of the trim body and engage with the trim body. Each connector includes an outer frame, an inner frame, and a first elastic arm. The outer frame has a first hollow cavity. The inner frame is placed inside the first hollow cavity, and the two ends of the first elastic arm are respectively connected to the outer frame and the inner frame. The inner frame has a waist-shaped groove through which the mounting pin passes. The waist-shaped groove extends along the length of the inner frame. The inner frame includes two second elastic arms. The two second elastic arms are arranged at intervals along the width of the outer frame, and the two second elastic arms are located on both sides of the waist-shaped groove. When the two second elastic arms move in opposite directions, the width of the waist-shaped groove increases accordingly.

2. The roof trim assembly according to claim 1, characterized in that: The inner frame also includes a sealing arm for sealing the two first elastic arms, and the sealing arm and the first elastic arms together form the inner frame.

3. The roof trim assembly according to claim 1, characterized in that: The outer frame includes two horizontal segments and two vertical segments. The two ends of each horizontal segment are connected to the two vertical segments respectively, and the two ends of each vertical segment are connected to the two horizontal segments respectively. The horizontal segments and the vertical segments together form the outer frame.

4. The roof trim assembly according to claim 1, characterized in that: The first elastic arm is in the shape of a straight strip, and both ends of each first elastic arm are connected to the inner frame and the outer frame, respectively.

5. The roof trim assembly according to claim 4, characterized in that: The first elastic arm is arranged horizontally.

6. The roof trim assembly according to claim 4, characterized in that: The first elastic arm is arranged at an angle.

7. The roof trim assembly according to claim 1, characterized in that: The first elastic arm is wavy, and its two ends are connected to the inner frame and the outer frame, respectively.

8. The roof trim assembly according to claim 1, characterized in that: The first elastic arm is curved, and both ends of each first elastic arm are connected to the inner frame and the outer frame, respectively.

9. The roof trim assembly according to claim 1, characterized in that: The first elastic arm is V-shaped, and both ends of each first elastic arm are connected to the inner frame and the outer frame, respectively.

10. The roof trim assembly according to claim 1, characterized in that: The two first elastic arms have a raised strip on their facing sides. The raised strip has a notch on the side of the strip body in the height direction. The two notches together form the waist-shaped groove. The raised strip has a guide slope on the side of the strip body in the height direction away from the strip body. The distance between the ends of the two notches is less than the maximum radial dimension of the column.

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