Vehicle roof trim strip fixing device, and assembly for connecting vehicle roof trim strip to sheet metal

Abstract

A vehicle roof trim strip fixing device and an assembly for connecting a vehicle roof trim strip (500) to sheet metal. The vehicle roof trim strip fixing device comprises: a base part (100) and a positioning part (300), wherein a hard support block (110), which is configured to be connected to the bottom surface of a sheet metal groove (410) in an abutting manner, is provided at the bottom of the base part (100); the positioning part (300) is elastically deformably connected to the base part (100), and the positioning part (300) is configured to be connected to a sheet metal flange (420) in a fastening manner so as to limit the degree of freedom of the base part (100) in the direction of the width of the sheet metal groove (410); the base part (100) is provided with at least one elastic snap-fit fastener (200); and the elastic snap-fit fastener (200) is configured to be snap-fitted with the sheet metal flange (420), so as to prevent the base part (100) from disengaging from the interior of the sheet metal groove (410).

Description

A roof trim fixing device and a connection assembly between a roof trim and a sheet metal Technical Field

[0001] The present invention belongs to the technical field of vehicle parts and relates to a roof trim fixing device and a connection assembly between the roof trim and a sheet metal. Background Art

[0002] A car roof trim is a component installed on a roof rack. The roof trim mainly serves to decorate and cover the roof welding points. The roof trim is generally connected to the roof sheet metal through a snap-on structure. For example, an invention patent with application number CN201510667884.0 is named "A car roof trim installation structure". This installation structure is actually the connection structure between the roof trim and the roof sheet metal.

[0003] Due to the certain tolerance of the roof sheet metal flange structure, the roof trim needs to adapt to the structural tolerance of ±1.5mm in the Z and Y directions. As a result, most of the current roof trims are designed with an elastic support structure at the bottom to absorb the tolerance. When installing the roof trim, the top of the roof trim is pressed to make it sink, prompting the snap structure to engage with the flange of the roof sheet metal. However, this structure is not easy to absorb large tolerances. At the same time, this structure causes the support between the roof trim and the bottom surface of the sheet metal to be elastic, so the roof trim is prone to loosening when pressed in the Z direction. Technical issues

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a roof trim fixing device and a connection assembly between the roof trim and the sheet metal. Technical Solutions

[0005] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to propose a roof trim fixing device and a connection assembly between the roof trim and the sheet metal.

[0006] The objectives of the present invention can be achieved through the following technical solutions: A roof trim fixing device, comprising: a base portion and a positioning portion, the bottom of the base portion is provided with a hard support block for abutting and connecting with the bottom surface of the sheet metal groove, the positioning portion can be elastically deformed and connected to the base portion, the positioning portion is used to buckle with the sheet metal flange to limit the freedom of the base portion in the width direction of the sheet metal groove, the base portion is provided with at least one elastic clip, the elastic clip is used to buckle with the sheet metal flange to limit the base portion from falling out of the sheet metal groove.

[0007] Preferably, the elastic buckle is configured as an elastic structure, and the elastic buckle is provided with a tooth portion, and the tooth portion can be engaged with the sheet metal flange under the elastic force of the elastic buckle.

[0008] Preferably, the movement direction of the elastic clip away from the sheet metal flange is the disengagement direction, and the movement direction of the elastic clip close to the sheet metal flange is the deformation direction; the elastic clip accumulates force when moving along the disengagement direction, and when the elastic clip is engaged with the sheet metal flange and the base portion tends to disengage from the sheet metal groove, the elastic clip tends to move toward the deformation direction, and the deformation direction is inconsistent with the disengagement direction.

[0009] Preferably, the locking tooth portion includes a plurality of locking teeth arranged on the arc-shaped surface of the elastic buckle.

[0010] Preferably, the positioning portion includes an elastic bracket and a positioning buckle, the positioning buckle and the elastic buckle are arranged face to face, one end of the elastic bracket is connected to the base portion and the other end is connected to the positioning buckle.

[0011] Preferably, the elastic bracket includes a positioning column and two deformable connecting pieces, one end of one connecting piece is connected to the base portion and the other end is connected to the positioning column, and one end of the other connecting piece is connected to the positioning buckle and the other end is connected to the positioning column.

[0012] Preferably, the base portion is provided with a clamping bracket for clamping with the roof trim.

[0013] A connection assembly for a roof trim and a sheet metal includes at least one of the above-mentioned roof trim fixing devices, a roof sheet metal and a roof trim, wherein the roof sheet metal includes a sheet metal groove and a sheet metal flange located in the sheet metal groove, a base portion is installed in the sheet metal groove, and a hard support block is connected in contact with the bottom surface of the sheet metal groove, a positioning portion buckles the sheet metal flange to limit the freedom of the base portion in the width direction of the sheet metal groove, an elastic clip is engaged with the sheet metal flange to limit the base portion from escaping from the sheet metal groove, and the roof trim covers the sheet metal groove and is fixedly connected to the roof sheet metal through the base portion.

[0014] Preferably, the sheet metal flange is configured as a bending structure with an inverted L-shaped cross-section, the sheet metal flange includes a vertical side and a horizontal side integrally connected to the vertical side, the positioning buckle is connected to the outer wall surface of the vertical side and the positioning column is connected to the horizontal side, and the tooth portion of the elastic buckle is engaged with the horizontal side.

[0015] Preferably, when the base portion is installed in the sheet metal groove, the elastic clip is squeezed by the horizontal edge and deformed to store force in the direction of release; when the hard support block is in contact with the bottom surface of the sheet metal groove, the tooth portion adaptively engages with the horizontal edge through a locking tooth. Beneficial effects

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. A fixing device that can absorb Z- and Y-direction tolerances is provided. The roof trim will not loosen when installed on the roof sheet metal through this fixing device, and a hard support effect is achieved in the Z direction through the hard support block, so the roof trim will not sink when pressed.

[0018] 2. The elastic clip can absorb the tolerances in the Y and Z directions through elastic deformation. The elastic clip can store force through deformation and cooperate with the tooth part to clamp the sheet metal flange, so that the elastic clip can absorb the tolerance of ±1.5mm in the Y and Z directions.

[0019] 3. A tooth portion is provided at one end of the elastic clip, and the elastic clip can rotate with its other end as a fulcrum, so one of the disengagement direction and the deformation direction of the elastic clip is clockwise and the other is counterclockwise; the base portion can only separate the tooth portion from the sheet metal flange when the elastic clip is deformed in the disengagement direction. When the base portion has an upward disengagement tendency, it will pull the elastic clip to generate a tendency to move in the deformation direction, so that the elastic clip not only does not loosen the sheet metal flange, but can make the tooth portion clamp the sheet metal flange more firmly.

[0020] 4. The latching teeth include a plurality of engaging teeth arranged on the arc-shaped surface of the elastic buckle. The latching teeth are actually similar to a gear or an arc-shaped rack structure. Therefore, the latching teeth include a plurality of sequentially arranged engaging teeth. These multiple engaging teeth can absorb large Z-direction tolerances and also achieve adaptive installation.

[0021] 5. The positioning column and positioning buckle respectively press against the two sides of the sheet metal flange to achieve Y-up positioning. The connecting piece is provided with multiple elastic structures (such as bending structures) to absorb large tolerances, and the elastic bracket and positioning buckle can be deformed under force during the assembly process.

[0022] 6. Therefore, the roof trim can absorb larger tolerances in the Y and Z directions during installation, and the roof trim will not loosen after installation. It can achieve a hard support effect in the Z direction, and the entire installation process is adaptive. You only need to press the roof trim with a fixing device into the sheet metal groove, so it is very convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a top view of the connection assembly of the roof molding and the sheet metal of the present invention.

[0024] FIG2 is a schematic cross-sectional view taken along line AA of FIG1 .

[0025] FIG3 is a schematic cross-sectional view taken along line BB in FIG1 .

[0026] FIG4 is an exploded view of the structure of the connection assembly of the roof trim strip and the sheet metal of the present invention.

[0027] FIG5 is a schematic diagram showing the connection relationship between the roof trim fixing device and the sheet metal flange of the present invention.

[0028] FIG6 is a schematic structural diagram of a roof trim fixing device according to the present invention.

[0029] FIG. 7 is a schematic structural diagram of the elastic buckle of the present invention.

[0030] In the figure, 100, base part; 110, hard support block; 120, snap-on bracket; 200, elastic snap buckle; 210, snap-on tooth part; 211, snap-on tooth; 300, positioning part; 310, elastic bracket; 311, positioning column; 312, connecting piece; 320, positioning buckle; 400, roof sheet metal; 410, sheet metal groove; 420, sheet metal flange; 421, vertical edge; 422, horizontal edge; 500, roof trim. Modes for Carrying Out the Invention

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0032] As shown in Figures 1-7, a roof trim fixing device includes: a base portion 100 and a positioning portion 300. The bottom of the base portion 100 is provided with a hard support block 110 for contacting and connecting with the bottom surface of the sheet metal groove 410. The positioning portion 300 can be elastically deformed and connected to the base portion 100. The positioning portion 300 is used to snap together with the sheet metal flange 420 to limit the freedom of the base portion 100 in the width direction of the sheet metal groove 410. The base portion 100 is provided with at least one elastic clip 200. The elastic clip 200 is used to snap together with the sheet metal flange 420 to limit the base portion 100 from falling out of the sheet metal groove 410.

[0033] The fixing device is used to install the roof molding 500 on the roof sheet metal 400 and fix the two. The base portion 100 and the positioning portion 300 are actually connected as one piece. The base portion 100 is pre-assembled with the roof molding 500. When the roof molding 500 is assembled with the roof sheet metal 400, the positioning portion 300 is used to buckle the sheet metal flange 420 of the roof sheet metal 400 to achieve positioning. The bottom of the base portion 100 is connected to the bottom surface of the sheet metal groove 410 of the roof sheet metal 400 through the hard support block 110 to establish a hard support (that is, the two are in contact and connected and the base portion 100 cannot move downward), so the roof molding 500 is fixed to the roof sheet metal 400. The strip 500 will not loosen when pressed in the Z direction. When the hard support block 110 is in contact with the bottom surface of the sheet metal groove 410, the elastic clip 200 clamps the sheet metal flange 420 to limit the upward movement of the base part 100, and the elastic clip 200 absorbs the tolerances in the Y and Z directions through the elastic structure; the positioning part 300 is used to achieve Y-direction positioning (that is, the width direction of the sheet metal groove 410). When the positioning part 300 clamps the sheet metal flange 420, the base part 100 cannot move left and right. Since the positioning part 300 is elastically deformably connected to the base part 100, this means that it can also absorb the tolerance in the Y direction.

[0034] A fixing device that can absorb Z-direction and Y-direction tolerances is provided. The roof trim 500 will not become loose when installed on the roof sheet metal 400 through this device, and a hard support effect is achieved in the Z direction through the hard support block 110, so the roof trim 500 will not sink when pressed.

[0035] As shown in Figures 3 and 5-7, based on the above embodiment, the elastic buckle 200 is set as an elastic structure, and the elastic buckle 200 is provided with a tooth portion 210, which can be engaged with the sheet metal flange 420 under the elastic force of the elastic buckle 200.

[0036] For example, there are two groups of elastic clips 200, and the two groups of elastic clips 200 are respectively located on both sides of the elastic bracket 310. This has a better clamping effect and a more uniform clamping force.

[0037] The elastic clip 200 can absorb the tolerances in the Y and Z directions through elastic deformation. The elastic clip 200 can store force through deformation and cooperate with the tooth part 210 to clamp the sheet metal flange 420, so that the elastic clip 200 can absorb the tolerances of ±1.5mm in the Y and Z directions.

[0038] It should be pointed out here that since elastic supports are usually provided at the bottom of the existing structure, the elastic structure at the bottom of the structure is used to absorb the Z-direction tolerance of ±1.5mm. However, this will cause the decorative strip to loosen when pressed in the Z direction (because the elastic structure at the bottom will produce elastic deformation).

[0039] In this embodiment, it is necessary to establish a hard support between the fixing device and the bottom surface of the roof sheet metal 400 (sheet metal groove 410) and to absorb a large amount of work during installation. Therefore, this embodiment specially provides an elastic clip 200, and a tooth portion 210 is provided on the elastic clip 200. The elastic clip 200 uses its own elastic force to make the tooth portion 210 press against the sheet metal flange 420. Since the tooth portion 210 is a rack-shaped area, the base portion 100 and the roof sheet metal 400 can be fixed in the Z direction, and a large Z direction tolerance can be absorbed by the tooth portion 210.

[0040] Based on the above embodiment, the movement direction of the elastic clip 200 away from the sheet metal flange 420 is the disengagement direction, and the movement direction of the elastic clip 200 close to the sheet metal flange 420 is the deformation direction; the elastic clip 200 accumulates force when moving along the disengagement direction, and when the elastic clip 200 is engaged with the sheet metal flange 420 and the base part 100 tends to disengage from the sheet metal groove 410, the elastic clip 200 tends to move in the deformation direction, and the deformation direction is inconsistent with the disengagement direction.

[0041] As shown in Figures 2-7, when the elastic clip 200 deforms in the release direction, it generates accumulated force and absorbs tolerances in the Y and Z directions. In the actual structure, a tooth portion 210 is provided at one end of the elastic clip 200, and the elastic clip 200 can rotate with its other end as a fulcrum. Therefore, one of the release direction and the deformation direction of the elastic clip 200 is clockwise and the other is counterclockwise. The base 100 can only separate the tooth portion 210 from the sheet metal flange 420 when the elastic clip 200 deforms in the release direction. When the base 100 has an upward disengagement tendency, it will cause the elastic clip 200 to move in the deformation direction. As a result, the elastic clip 200 not only does not loosen the sheet metal flange 420, but instead can more firmly clamp the tooth portion 210 to the sheet metal flange 420.

[0042] As shown in Figures 3 and 5-7 , based on the above embodiment, the latching tooth portion 210 includes a plurality of latching teeth 211 disposed on the arcuate surface of the elastic buckle 200. The latching tooth portion 210 is actually similar to a gear or an arcuate rack structure. Therefore, the latching tooth portion 210 includes a plurality of sequentially arranged latching teeth 211. These multiple latching teeth 211 can accommodate larger Z-direction tolerances and also achieve adaptive installation.

[0043] The engaging teeth 211 are arranged in a continuous shape. When the base part 100 is installed from top to bottom, the sheet metal flange 420 contacts each engaging tooth 211 one by one. When the hard support block 110 at the bottom of the base part 100 is in contact with the bottom surface of the sheet metal groove 410 (that is, when the base part 100 is installed in place in the Z direction), a engaging tooth 211 at the corresponding position in the engaging tooth part 210 is engaged with the sheet metal flange 420 (that is, the sheet metal flange 420 is clamped between two adjacent engaging teeth 211). This can absorb larger Z-direction tolerances and also achieve the effect of adaptive installation.

[0044] It is worth pointing out here that when the base portion 100 is pressed downward into the sheet metal groove 410 along the Z direction, the horizontal edge 422 of the sheet metal flange 420 can push the elastic buckle 200 to move in the release direction. At this time, each engaging tooth 211 slides over the horizontal edge 422 one by one. When the base portion 100 is in contact with the bottom surface of the sheet metal groove 410, a engaging tooth 211 that is in contact with the horizontal edge 422 clamps the horizontal edge 422 of the sheet metal groove 410, so this fixing device can also achieve the effect of adaptive installation during installation.

[0045] As shown in Figures 2 and 4-7, on the basis of the above embodiment, the positioning portion 300 includes an elastic bracket 310 and a positioning buckle 320. The positioning buckle 320 is arranged face to face with the elastic buckle 200. One end of the elastic bracket 310 is connected to the base portion 100 and the other end is connected to the positioning buckle 320. The positioning buckle 320 is configured to allow deformation relative to the base portion 100 through the elastic bracket 310.

[0046] The positioning buckle 320 is connected to the base portion 100 through the elastic bracket 310. In fact, the above three parts are integrally formed in the structure. The positioning buckle 320 can form an elastic deformation structure through the elastic bracket 310, so that the positioning buckle 320 can absorb a larger Y-direction tolerance.

[0047] Based on the above embodiment, the elastic bracket 310 includes a positioning column 311 and two deformable connecting pieces 312, one end of one connecting piece 312 is connected to the base portion 100 and the other end is connected to the positioning column 311, and one end of the other connecting piece 312 is connected to the positioning buckle 320 and the other end is connected to the positioning column 311.

[0048] The positioning column 311 and the positioning buckle 320 respectively press against the two sides of the sheet metal flange 420 to achieve Y-upward positioning. The connecting piece 312 is provided with multiple elastic structures (such as curved structures) to absorb larger tolerances, and the elastic bracket 310 and the positioning buckle 320 can be deformed under force during the assembly process.

[0049] As shown in Figures 2, 3, 5, and 6, based on the above embodiment, the base portion 100 is provided with a clamping bracket 120 for clamping with the roof molding 500. The clamping bracket 120 is configured as an inverted L-shaped structure. There are at least two sets of clamping brackets, one on the left and one on the right side of the base portion 100. The clamping brackets 120 on both sides respectively clamp with the sides of the roof molding 500, thereby assembling the base portion 100 and the roof molding 500.

[0050] As shown in Figures 1-7, a connection assembly of a roof trim 500 and a sheet metal includes at least one roof trim fixing device, a roof sheet metal 400 and a roof trim 500, the roof sheet metal 400 includes a sheet metal groove 410 and a sheet metal flange 420 located in the sheet metal groove 410, the base portion 100 is installed in the sheet metal groove 410, and the hard support block 110 is connected to the bottom surface of the sheet metal groove 410, the positioning portion 300 buckles the sheet metal flange 420 to limit the freedom of the base portion 100 in the width direction of the sheet metal groove 410, the elastic buckle 200 is engaged with the sheet metal flange 420 to limit the base portion 100 from escaping from the sheet metal groove 410, and the roof trim 500 covers the sheet metal groove 410 and is fixedly connected to the roof sheet metal 400 through the base portion 100.

[0051] The sheet metal groove 410 is the groove structure on the roof sheet metal 400. The roof trim 500 is used to be installed on the sheet metal groove 410 and cover the top opening of the sheet metal groove 410. The sheet metal flange 420 is an inverted L-shaped flange structure in the sheet metal groove 410. The roof trim 500 is connected to the sheet metal groove 410 through at least one roof trim fixing device. Since the sheet metal flange 420 is relatively long, there is a certain structural tolerance. Technically, the roof trim 500 is required to be able to adapt to the structural tolerances from the Z and Y directions. The roof trim 500 absorbs the structural tolerances of the sheet metal flange 420 in the Z and Y directions through the roof trim fixing device, and at the same time makes the roof trim 500 have no dynamic feeling in the Z direction after being installed in place.

[0052] Based on the above embodiment, the sheet metal flange 420 is configured as a bending structure with an inverted L-shaped cross-section. The sheet metal flange 420 includes a vertical edge 421 and a horizontal edge 422 integrally connected to the vertical edge 421. The positioning buckle 320 is connected to the outer wall surface of the vertical edge 421 and the positioning column 311 is connected to the horizontal edge 422. The tooth portion 210 of the elastic buckle 200 is engaged with the horizontal edge 422.

[0053] On the basis of the above embodiment, when the base portion 100 is installed in the sheet metal slot 410, the elastic clip 200 is squeezed by the horizontal edge 422 and deforms and accumulates force in the direction of release; when the hard support block 110 is in contact with the bottom surface of the sheet metal slot 410, the tooth portion 210 adaptively engages with the horizontal edge 422 through a locking tooth 211.

[0054] Each fixing device is pre-assembled with the roof molding 500, and then the roof molding 500 is installed into the sheet metal groove 410, and the base portion 100 of the fixing device is inserted into the sheet metal groove 410 until it is installed in place. During this process, the positioning portion 300 buckles the sheet metal flange 420, and the elastic buckle 200 is engaged with the sheet metal flange 420; the specific process of the positioning portion 300 buckling the sheet metal flange 420 is as follows: the positioning column 311 in the elastic bracket 310 is in contact with the end of the horizontal side 422 of the sheet metal flange 420, the positioning buckle 320 is in contact with the outer wall of the vertical side 421 of the sheet metal flange 420, and the two connecting pieces 312 and The positioning buckle 320 itself can absorb the Y-direction tolerance of the sheet metal flange 420 through deformation; the clamping process of the elastic buckle 200 and the sheet metal flange 420 is as follows: when the base part 100 is inserted into the sheet metal groove 410 to a certain position, the end of the horizontal edge 422 of the sheet metal flange 420 contacts the tooth part 210 of the elastic buckle 200, thereby pushing the elastic buckle 200 to move in the disengagement direction. When the base part 100 is installed in place, the hard support block 110 contacts and connects with the bottom surface of the sheet metal groove 410. At this time, a clamping tooth 211 of the tooth part 210 is clamped with the horizontal edge 422, thereby fixing the car strip trim to the roof sheet metal 400. Therefore, the roof trim 500 can absorb larger tolerances in the Y and Z directions during installation, and the roof trim 500 will not become loose after installation. It can achieve a hard support effect in the Z direction, and the entire installation process is adaptive. It is only necessary to press the roof trim 500 with a fixing device into the sheet metal groove 410, so it is very convenient during installation.

[0055] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0056] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0057] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0058] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0059] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A roof trim fixing device, characterized in that, Including: A base part (100) and a positioning part (300). A hard support block (110) for abuttingly connecting with the bottom surface of a sheet metal groove (410) is arranged at the bottom of the base part (100). The positioning part (300) is elastically deformably connected with the base part (100). The positioning part (300) is used for buckling with a sheet metal flange (420) to limit the freedom degree of the base part (100) in the width direction of the sheet metal groove (410). At least one elastic buckle (200) is arranged on the base part (100). The elastic buckle (200) is used for clamping with the sheet metal flange (420) to limit the base part (100) from being disengaged from the sheet metal groove (410).

2. The roof trim fixing device according to claim 1, characterized in that: The elastic buckle (200) is arranged as an elastic structure. The elastic buckle (200) is provided with a tooth part (210). The tooth part (210) can be clamped with the sheet metal flange (420) under the elastic force of the elastic buckle (200).

3. The roof trim fixing device according to claim 2, characterized in that: The movement direction of the elastic buckle (200) away from the sheet metal flange (420) is the unlocking direction. The movement direction of the elastic buckle (200) close to the sheet metal flange (420) is the deformation direction. When the elastic buckle (200) moves along the unlocking direction, it stores energy. When the elastic buckle (200) is clamped with the sheet metal flange (420) and the base part (100) has a tendency to be disengaged from the sheet metal groove (410), the elastic buckle (200) has a tendency to move towards the deformation direction. The deformation direction is inconsistent with the unlocking direction.

4. The roof trim fixing device according to claim 3, characterized in that: The tooth part (210) includes a plurality of clamping teeth (211) arranged on the arc surface of the elastic buckle (200).

5. The roof trim fixing device according to claim 1, characterized in that: The positioning part (300) includes an elastic bracket (310) and a positioning buckle (320). The positioning buckle (320) is arranged face to face with the elastic buckle (200). One end of the elastic bracket (310) is connected with the base part (100) and the other end is connected with the positioning buckle (320).

6. The roof trim fixing device according to claim 5, characterized in that: The elastic bracket (310) includes a positioning column (311) and two deformable connecting pieces (312). One end of one connecting piece (312) is connected with the base part (100) and the other end is connected with the positioning column (311). One end of the other connecting piece (312) is connected with the positioning buckle (320) and the other end is connected with the positioning column (311).

7. A roof trim fixing device according to any one of claims 1-6, characterized in that: The base part (100) is provided with a clamping bracket (120) for clamping with a roof trim strip (500).

8. A connecting assembly of a roof trim strip (500) and sheet metal, characterized in that, Comprising at least one roof trim fixing device as described in any one of claims 1-7, further comprising a roof sheet metal (400) and a roof trim (500), the roof sheet metal (400) includes a sheet metal groove (410) and a sheet metal flange (420) located within the sheet metal groove (410), the base portion (100) is installed within the sheet metal groove (410), and the hard support block (110) is in contact connection with the bottom surface of the sheet metal groove (410), the positioning portion (300) buckles the sheet metal flange (420) to limit the freedom degree of the base portion (100) in the width direction of the sheet metal groove (410), the elastic buckle (200) is snap-connected with the sheet metal flange (420) to limit the base portion (100) from disengaging from the sheet metal groove (410), and the roof trim (500) covers the sheet metal groove (410) and is fixedly connected to the roof sheet metal (400) through the base portion (100).

9. The connecting assembly of a roof trim strip (500) and sheet metal according to claim 8, characterized in that: The sheet metal flange (420) is provided as a bent structure with a cross-section in an inverted L shape, the sheet metal flange (420) includes a vertical side (421) and a horizontal side (422) integrally connected to the vertical side (421), the positioning buckle (320) is in contact connection with the outer wall surface of the vertical side (421) and the positioning post (311) is in contact connection with the horizontal side (422), and the tooth portion (210) of the elastic buckle (200) is snap-connected with the horizontal side (422).

10. The connection assembly between a roof trim strip (500) and sheet metal according to claim 9, characterized in that: When the base portion (100) is inserted into the sheet metal groove (410), the elastic buckle (200) is squeezed by the horizontal side (422) and thus deforms and stores energy in the direction of unlocking; when the hard support block (110) is in contact connection with the bottom surface of the sheet metal groove (410), the tooth portion (210) adaptively engages with the horizontal side (422) through a snap tooth (211).

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