Snap assembly, interior trim piece snap system, and snap method

Abstract

The invention relates to a clasp assembly, an interior trim clasp system and a clasp method. A clasp assembly for fastening an interior trim in a vehicle to a body part, comprising a base body (4) made of plastic for clamping into a hole (15) made in the body part (3) and an insert (5) made of sheet metal, which is configured as a spring leaf and is intended to receive a cylindrical body (21) provided on the interior trim; a clasp portion is provided on the base body (4) and a corresponding clasp portion is provided on the insert (5), which counter-clasps the clasp portion from the back, so that the base body (4) and the insert form a structural unit which is pre-assembled together and can be pre-fitted on the body part (3) before the cylindrical body is received.

Description

TECHNICAL FIELD

[0001] The present invention relates to a clip assembly for fixing an interior trim part in a vehicle to a body part, an interior trim part clip system for fixing to a body part, and a method for clipping an interior trim part and a body part to each other. BACKGROUND

[0002] It is known in the prior art to fix various parts in a vehicle together by means of a clip, for example, sheet metal, frames, etc. can be fixed together by means of a clip. The clip, which is made of plastic, comprises two parts which are integrally formed, the first part is connected to the interior trim part and the second part is connected to the body part. At one end of the clip, an annular groove is provided on the outer periphery of the first part, the clip is inserted into a correspondingly formed opening in the interior trim part with the end and the edge of the opening is inserted into the annular groove on the clip, thereby pre-assembling the clip and the interior trim part together. The second part of the clip has a deformable plug portion, a receiving groove is formed on the outer periphery of the clip between the plug portion and the first part of the clip. The plug portion can be inserted into a hole made by press forming in the body part, since the diameter of the plug portion is greater than the diameter of the hole, in order to insert the plug portion into the hole, the plug portion needs to be elastically deformed. When the plug portion is inserted into the hole, the edge of the hole in the body part is inserted into the receiving groove on the plug portion and the plug portion returns to its original shape, thereby securely holding the pre-assembled assembly consisting of the clip and the interior trim part on the body part.

[0003] However, the body part is usually made of sheet metal, the hole therein is made by a press process, thus inevitably having burrs and having sharp edges. During the process of assembling and disassembling the clip, the clip is damaged by the shearing of the burrs and edges, thus the clip is damaged.

[0004] In order to achieve the elastic deformation of the plug portion when it is inserted into the hole in the body part, while meeting the ergonomic requirements during assembly, the plug portion is configured as a thin-walled member. This makes the clip often prone to damage.

[0005] In addition, when the plug portion is inserted into the hole, it is desirable to align the axis of the plug portion with the axis of the hole and to insert the plug portion into the hole along the axis of the hole perpendicular to the surface of the body part to be inserted. However, during the actual assembly of the interior trim part, since one end of the interior trim part must be assembled first, the other end of the interior trim part, which is fitted with the clip, has to be assembled into the hole in the body part by deflection, in this case, the axis of the clip is often not aligned with the axis of the body part when the clip is inserted into the hole, but has an included angle. At this time, when the clip is pressed in using an impact force, one side of the clip is subjected to a greater force, and the uneven force on the entire clip causes the side subjected to a greater force to be cut off.

[0006] Furthermore, the hole made in the body part has a large tolerance caused by manufacturing and installation, which is caused by the change in diameter of the hole and the change in position, resulting in the axis of the buckle not coinciding with the axis of the hole, which in turn causes the insertion part of the buckle to be subjected to uneven force when the insertion part is inserted into the hole and causes damage to the insertion part.

[0007] After the buckle fails, there is a gap between the interior trim and the body part because the interior trim is not positioned, and vibration occurs easily, which produces noise and water leakage. Furthermore, the damaged buckle is not easily removed to replace a new buckle, which affects the assembly efficiency and assembly quality. SUMMARY

[0008] Based on this, the task of the present application is to provide an improved buckle assembly for fixing an interior trim in a vehicle to a body part, which can achieve easier buckling of the interior trim to the body part and less damage.

[0009] The object is achieved by a buckle assembly for fixing an interior trim in a vehicle to a body part according to the present application, which comprises:

[0010] The buckle assembly comprises a base made of plastic for buckling into a hole made in the body part and an insert made of sheet metal, which is configured as a spring leaf and is used to receive a cylindrical body provided on the interior trim; a buckle part is provided on the base and a corresponding buckle part is provided on the insert, which counter-buckles the buckle part from the back, so that the base and the insert form a structural unit that is pre-assembled together and can be pre-assembled on the body part before receiving the cylindrical body.

[0011] The invention is based on the idea that, in order to rule out the fact that, on the one hand, the snap-in elements, which are arranged on the end of the interior trim part which is first fixed and on the other end of which the snap-in elements are arranged, have to be inserted into the body part by deflecting the interior trim part and, on the other hand, the fact that the direction of installation of the snap-in device does not coincide with the direction of the axis of the hole in the body part due to the tolerances which the hole in the body part has due to the manufacturing and installation conditions, which in turn leads to the fact that the snap-in device is damaged during installation due to uneven forces and due to shearing by burrs on the body part, the invention proposes that the snap-in device which is preassembled on the interior trim part is improved to a snap-in assembly which can be preassembled on the body part, and that the one-piece snap-in device of the prior art is improved to a two-piece snap-in assembly, i.e. the snap-in assembly according to the invention comprises a base body made of plastic and an insert made of sheet metal, wherein the base body is responsible for the insertion into the body part, and wherein the axis of the base body can easily be aligned with the axis of the hole in the body part during the insertion, and wherein the base body has a better adaptability to the tolerances which the hole in the body part has due to the manufacturing and installation conditions. The insert made of sheet metal is responsible for receiving and snap-in the cylindrical body which is arranged on the interior trim part. The insert made of sheet metal has a good elastic deformation property, and thus makes the insertion and snap-in of the cylindrical body on the interior trim part and thus the snap-in of the interior trim part to the body part easier.

[0012] According to a preferred embodiment of the snap-in assembly according to the invention, the insert is a one-piece sheet metal forming. The insert blank is punched out of a sheet metal, and then the insert which can be installed into the base body is formed by stamping. In this way, the insert which can be obtained has a simple structure and is not easily damaged.

[0013] According to a preferred embodiment of the snap-in assembly according to the invention, the insert comprises a first bottom, a side arm and a first flange which is connected to the side arm, wherein a window-shaped portion which constitutes the corresponding snap-in portion is formed by punching on the side arm of the insert, and wherein the window-shaped portion is inclined upwardly and outwardly from the side arm. In this way, the corresponding snap-in portion can be manufactured in a simple manner.

[0014] According to a particularly preferred embodiment of the snap-in assembly according to the invention, the base body has a second bottom, a peripheral wall and a second flange which is connected to the peripheral wall on the side which is opposite to the second bottom, and wherein a wedge-shaped protrusion which constitutes the snap-in portion is integrally formed on the inner side of the peripheral wall of the base body, and wherein the window-shaped portion engages the protrusion from the back, so that the base body and the insert are snap-in to each other. In this way, a simple snap-in of the base body and the insert is achieved, so that the insert is prevented from being pulled out of the base body.

[0015] According to a particularly preferred embodiment of the snap-in assembly according to the application, an inwardly projecting, essentially ridge-shaped protrusion is provided on the side arm of the insert above the window-shaped portion, which protrusion extends essentially parallel to the first base over the entire width of the insert and is formed by stamping the insert and is intended to be inserted into a corresponding recess on the cylindrical body of the interior trim part. By forming the protrusion by stamping, a simple shaping of the protrusion is achieved, and by the protrusion extending over the entire width of the insert, a reliable snap-in of the insert to the cylindrical body is ensured, so that the snap-in of the cylindrical body into the insert in an easy and non-destructive manner is achieved even if the installation direction of the cylindrical body does not coincide with the axis of the base body.

[0016] According to a particularly preferred embodiment of the application, a flexible rim portion is formed on the outer periphery of the second flange of the base body, which rim portion projects obliquely downward from the second flange and is elastically deformable and can be pressed against the surface of the bodywork part in the case of the installation of the base body on the bodywork part. Thereby, it is possible to prevent the ingress of water, dirt and other pollutants from the outside into the bodywork, which can cause corrosion of the bodywork parts made of metal due to rusting.

[0017] According to a further preferred embodiment of the application, a sealing ring is provided around the outer periphery of the base body below the rim portion, which sealing ring is arranged between the rim portion and the bodywork part in the case of the insertion of the base body into the hole of the bodywork part. Thereby, the sealing performance between the base body and the bodywork part is further improved, and the ingress of pollutants from the outside into the bodywork is prevented, which can cause contamination and damage of the bodywork.

[0018] According to a preferred embodiment of the application, a plurality of uniformly distributed wedge-shaped protrusions are integrally formed on the outer side of the peripheral wall of the base body for the snap-in of the base body into the hole of the bodywork part. By providing a plurality of uniformly distributed protrusions, the base body can be snap-in into the hole of the bodywork part by local deformation of the base body, so that the base body can be more easily introduced into the hole. At the same time, due to the uniform distribution of the individual protrusions on the outer side of the peripheral wall of the base body, a reliable positioning of the base body in the hole of the bodywork is ensured.

[0019] The object of the present application is furthermore achieved by an interior trim part snap system for fastening on a body part, comprising a snap assembly according to the present application preassembled on the body part and an interior trim part provided with a columnar body which can be inserted into and snap-connected with a recess of the snap assembly, such that the interior trim part can be positioned on the body part. In the case of a fastening of the interior trim part at one end, the columnar body located at the other end of the interior trim part can also be inserted into and snap-connected with the recess of the snap assembly already preassembled on the body part by deflecting the interior trim part. The columnar body provided on the interior trim part can itself be snap-connected with the recess by means of a deformation of the recess which is configured as a spring tab, without the columnar body having to be deformed, so that the strength of the columnar body can be configured comparatively high, which further reduces the risk of damage to the snap device during the installation process.

[0020] According to a preferred embodiment of the interior trim part snap system according to the present application, the width of the columnar body is smaller than the width of the recess and greater than the width of the gap between the recess and the base. On the basis thereof, the columnar body can be slid along the protrusion of the recess, so that an adaptation to the installation direction and to errors in the hole in the body can be achieved, while still ensuring a stable and reliable snap connection between the recess and the columnar body.

[0021] According to a preferred embodiment of the interior trim part snap system according to the present application, in the case of an installation of the interior trim part on the body part, a gap can exist between the first bottom of the recess and the second bottom of the base, and a gap can also exist between the first flange of the recess and the second flange of the base. Thereby, only a prevention of the extraction of the recess from the base is achieved by the snap portion on the base and the corresponding snap portion on the recess, while the recess can still be moved slightly in the direction of the bottom of the base even after the snap portions have been snapped, so that a force acting on the interior trim part in the downward direction, for example a force generated by a foot, can be absorbed.

[0022] According to a preferred embodiment of the interior trim part snap system according to the present application, the columnar body is configured tapering at the end facing away from the interior trim part. Thereby, it can be achieved that the columnar body can easily enter into the recess even when the insertion is performed by deflecting the interior trim part, so that the risk of a collision with the recess during the installation is reduced.

[0023] According to a preferred embodiment of the interior trim part snap system according to the present application, a rib is provided on the columnar body, so that the strength of the columnar body is further increased and the risk of a breakage during the insertion of the columnar body into the snap assembly is reduced.

[0024] The object of the present application is furthermore solved by a method for snap- connecting an interior trim part with a body part with each other using a snap assembly according to the present application, comprising the following method steps:

[0025] An insert made of sheet metal is inserted into a base made of plastic and a corresponding snap portion provided on the insert is snap-fitted from the back to a snap portion provided on the base, so that the base and the insert form a snap assembly which is pre-assembled together;

[0026] The snap assembly is inserted into a hole in a body part;

[0027] A column of the interior trim part is inserted into the insert and is snap-fitted to the insert.

[0028] The snap assembly comprising a base made of plastic and an insert made of sheet metal according to the present application can be pre-assembled on a body part, wherein the base is responsible for the snap-fitting to the body part, and when snap-fitted, the axis of the base can be easily ensured to coincide with the axis of the hole in the body part, so that the snap assembly can be easily and without being damaged inserted into the body part. The insert made of sheet metal is responsible for receiving a column provided on an interior trim part. The sheet metal which is configured as a spring leaf itself has good elastic deformation properties, so that the insertion of the column on the interior trim part and in turn the snap-fitting of the interior trim part to the body part is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0029] The present application will now be specifically described in the following with reference to the drawings. It is to be understood that the drawings are not necessarily to scale and that the drawings are only used to illustrate exemplary embodiments of the present application and should not be considered as limiting the present application. Therein:

[0030] Figure 1 A longitudinal sectional view of an interior trim part snap system according to the present application is shown;

[0031] Figure 2 A perspective view of an interior trim part snap system according to the present application is shown;

[0032] Figure 3 A sectional view of a snap assembly according to the present application is shown;

[0033] Figure 4 A view of the interior trim part snap system is shown along a view in the vertical direction, wherein the column is movable inside the insert; Figure 1

[0034] Figure 5 Another view of the interior trim part snap system is shown, wherein the column of the interior trim part is inserted into the snap assembly along the axis of the snap assembly;

[0035] Figure 6 Another view of the interior trim part snap system is shown, wherein the column of the interior trim part is inserted into the insert in a deflectable manner. DETAILED DESCRIPTION

[0036] ​Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. However, it should be understood that the description of the embodiments is merely illustrative and not intended to limit the technology of the present invention in any way. It should also be understood that embodiments of the present invention can be combined in various ways to provide further additional embodiments.

[0037] It should be understood that in the accompanying drawings, the same reference numerals denote the same elements. For clarity, the dimensions of some parts may be altered, enlarged, or reduced in the accompanying drawings.

[0038] Unless otherwise specified, all terms used in this specification have the meanings commonly understood by those skilled in the art. For the sake of brevity and / or clarity, well-known functions or structures are not described in detail.

[0039] Unless otherwise specified, the singular forms "described" and "the" used in the specification may include plural forms. The terms "comprising," "including," and "containing" as used in the specification indicate the presence of the claimed feature, but do not exclude the presence of one or more other features. The term "and / or" as used in the specification includes any and all combinations of one or more of the related listed items.

[0040] In the following text, unless otherwise stated, "left," "right," "up," "down," "front," "back," "high," and "low" all refer to directions within the accompanying drawings. It should be understood that spatial relationship terms such as "up," "down," "left," "right," "front," "back," "high," and "low" are intended to describe the relationship between one feature and another in the accompanying drawings. It should be understood that spatial relationship terms include not only the orientation shown in the drawings but also different orientations of the interior trim snap-fit ​​system during use or operation. For example, when the interior trim snap-fit ​​system in the accompanying drawings is reversed, a feature previously described as "below" other features can now be described as "above" other features. The interior trim snap-fit ​​system can also be oriented in other ways (rotated 90 degrees or in other orientations), in which case the relative spatial relationships will be interpreted accordingly.

[0041] Now refer to Figures 1 to 6 Exemplary embodiments of the snap-fit ​​assembly and interior trim snap-fit ​​system according to the present invention are described in detail.

[0042] like Figures 1 to 3 As shown, the snap-fit ​​assembly 1 according to the invention includes a barrel-shaped base 4, an insert 5, and a sealing ring. The base 4 is made of plastic, while the insert 5 is a sheet metal molded part and made of metal. The sealing ring 6 is made of rubber. The snap-fit ​​assembly 1 is pre-installed in a component of a vehicle, such as a body component.

[0043] The insert 5 is configured as an integrally formed spring sheet, the insert having a first bottom 7, side arms 8 and 9, and first flanges 10 and 11 connected to the side arms. A window formed by punching is provided on the side arms 8 and 9 of the insert 5, and a window-shaped portion 12 integral with the side arm and extending obliquely from the side wall is connected to the lower side of the window, the window-shaped portion 12 being made of material punched from the side arm.

[0044] The base 4 has a second bottom 16, a peripheral wall 17, and a second flange 18 connected to the peripheral wall 17 on a side opposite to the second bottom 16. An integrally formed wedge-shaped protrusion 13 is provided on the inner side of the peripheral wall of the base 4. During pre-assembly of the snap-fit ​​assembly 1, the insert 5 is inserted into the base 4 along the axis A of the base 4. When the window-shaped portion 12 contacts the protrusion 13, the window-shaped portion 12 springs inward toward the central axis of the base 4 under the squeezing action of the protrusion 13. The insert 5 continues to move toward the second bottom 16 of the base 4 until the window-shaped portion 12 passes the protrusion 13, then the window-shaped portion springs back to its initial position and its upper side abuts against the lower side of the protrusion 13, thereby preventing the insert 5 from being pulled out of the base 4.

[0045] Such as combination Figures 1 to 6 As can be clearly seen, a plurality of evenly distributed wedge-shaped protrusions 14 are integrally formed on the outer peripheral wall of the base 4, for example, four wedge-shaped protrusions 14 are formed in the illustrated embodiment. When the axial direction of the base 4 coincides with the axis of the hole 15 in the vehicle body component, and the base is inserted into the hole 15 along the axis of the hole 15, the base 4 undergoes slight deformation when the protrusions 14 on the base 4 contact the peripheral wall defining the hole 15. The base 4 continues to move until the protrusions 14 pass the hole 15, after which the base 4 returns to its initial shape and its wedge-shaped protrusions 14 engage with the hole 15 from the back.

[0046] A flexible edge portion 22 extending obliquely downward from the second flange 18 of the base is formed on its outer periphery. This edge portion is elastically deformable and, when the snap-fit ​​assembly is installed, can press firmly against the surface of the body component 3 to prevent external water and dust from entering the body component through the gap between the base 4 and the body component 3. To further enhance the sealing performance, a sealing ring 6 is provided below this edge portion around the outer periphery of the base. When the base 4 is embedded in the hole 15 of the body component 3, the sealing ring 6 is positioned between the edge 22 of the base 4 and the body component 3. The combined action of the edge portion 22 and the sealing ring 6 achieves a good seal in the snap-fit ​​assembly 1.

[0047] As from Figures 1 to 3As can be clearly seen, on the side arms 8 and 9 of the insert 5, above the window-shaped portion 12, there is an inwardly protruding, prismatic protrusion 19 extending substantially parallel to the first bottom 7. This protrusion is formed by stamping the insert. A columnar body 21 is formed on another component of the vehicle, such as the interior trim 2, with a groove 20 formed on its side surface. The columnar body 21 can be inserted into the insert 5 such that the protrusion 19 on the insert 5 engages with the groove 20 on the columnar body. As an alternative embodiment, a boss can also be provided on the columnar body 21, which engages the protrusion from the back after the columnar body is inserted into the insert 5.

[0048] The following details the assembly process of fixing the interior trim 2 to the body component 3 using the snap-fit ​​assembly 1. First, the insert 5 and the base 4 are pre-assembled such that the insert 5 is embedded into the base 4, with the window-shaped portion 12 of the insert 5 extending beyond the protrusion 13 of the base 4 and engaging with the protrusion 13 from the back. Next, the pre-assembled unit of the insert 5 and the base 4 is inserted as a whole into the hole 15 of the body component 3, with the wedge-shaped protrusion 14 on the outer side of the base's peripheral wall engaging with the hole 15 from the back, and the flexible edge portion 22 on the outer periphery of the second flange 18 of the base 4 pressing against the body component 3. Then, the columnar body 21 of the interior trim 2 is embedded into the insert 5, so that the columnar body 21 and the insert 5 engage with each other, thereby achieving relative positioning of the interior trim 2 and the body component 3.

[0049] It should be noted here that, if it is possible to obtain... Figure 4 and Figure 6 As clearly seen, the width of the column 21 is smaller than the width of the side arms 8 and 9 of the insert 5. Therefore, even when the interior trim 2 is installed on the body component 3, the column 21 can still slide along the width of the arm along the protrusion 19 extending across the entire width of the arm. Based on this, the interior trim 2 can be installed into the snap-fit ​​assembly more easily. Even when one end of the interior trim 2 is fixed, and the other end of the interior trim 2 with the column 21 is deflected and embedded into the snap-fit ​​assembly 1, although the axis of the column is not coincident with the axis of the snap-fit ​​assembly but forms an angle, the column 21 can still slide within the insert because its width is smaller than the width of the insert 5, thus facilitating installation.

[0050] Further points need to be pointed out, and as in Figure 2As clearly shown, when the interior trim 2 has been installed on the body component 3, there is a gap between the first bottom 7 of the insert 5 and the second bottom 16 of the base 4, and there is also a gap between the first flanges 10 and 11 of the insert and the second flange 18 of the base 4. Thus, through the window-shaped portion 12 of the insert 5 and the protrusion 13 of the base 4, only the insert 5 is prevented from being pulled out of the base along the axis A of the base 4, while the insert can still make slight movements along the longitudinal axis of the base 4 toward the second bottom 16 of the base 4, thereby absorbing the downward force acting on the interior trim.

[0051] List of reference numerals

[0052] 1. Clip-on assembly

[0053] 2. Interior trim

[0054] 3. Body components

[0055] 4. Matrix

[0056] 5. Inserts

[0057] 6. Sealing ring

[0058] 7. First bottom

[0059] 8. Side arm

[0060] 9. Side arm

[0061] 10. First flange

[0062] 11. First flange

[0063] 12. Window-shaped part

[0064] 13. Protrusion

[0065] 14. Protrusion

[0066] 15. Hole

[0067] 16. Second bottom

[0068] 17. Zhou Bi

[0069] 18. Second flange

[0070] 19. Protruding part

[0071] 20. Groove

[0072] 21. Columnar body

[0073] 22. Edge

[0074] A. Axis.

Claims

1. A snap-fit ​​assembly for securing interior trim pieces in a vehicle to a body component, the snap-fit ​​assembly comprising a base (4) made of plastic and an insert (5) made of sheet metal, the base (4) being snapped into a hole (15) formed in a body component (3), the insert (5) being configured as a spring sheet and for receiving a columnar body (21) disposed on the interior trim piece; a snap-fit ​​portion is provided on the base (4) and a corresponding snap-fit ​​portion is provided on the insert (5), the corresponding snap-fit ​​portion engaging the snap-fit ​​portion from the back, such that the base (4) and the insert (5) form a pre-assembled structural unit that can be pre-assembled on the body component (3) before receiving the columnar body, the insert (5) comprising a first bottom (7), side arms (8, 9) and a first flange (10, 11) connected to the side arms, wherein, A window-shaped portion, which is formed by punching, is provided on the side arm of the insert (5). The window-shaped portion extends outward and upward from the side arm. The base (4) has a second bottom (16), a peripheral wall (17), and a second flange (18) connected to the peripheral wall on the side opposite to the second bottom (16). A wedge-shaped protrusion (13), which is formed as a snap-fit ​​portion, is integrally formed on the inner side of the peripheral wall of the base. The window-shaped portion is fitted into the protrusion (13) from the back, so that the base (4) and the insert (5) snap together.

2. The snap-fit ​​assembly according to claim 1, characterized in that, The insert is a one-piece sheet metal molded part.

3. The snap-fit ​​assembly according to claim 1, characterized in that, On the side arm of the insert (5), above the window-shaped portion (12), there is also an inwardly protruding prismatic protrusion (19) that extends substantially parallel to the first bottom (7) over the entire width of the insert (5). The protrusion (19) is formed by stamping the insert and is used to be fitted into a corresponding groove (20) on the columnar body (21) of the interior trim (2).

4. The snap-fit ​​assembly according to claim 1, characterized in that, A flexible edge portion (22) extending obliquely downward from the second flange (18) of the substrate (4) is formed on the outer periphery of the second flange (18). The edge portion is elastically deformable and can be pressed against the surface of the body component when the substrate (4) is mounted on the body component (3).

5. The snap-fit ​​assembly according to claim 4, characterized in that, A sealing ring (6) is provided below the edge portion (22) around the outer periphery of the base body. When the base body (4) is embedded in the hole (15) of the body component, the sealing ring (6) is provided between the edge portion and the body component (3).

6. The snap-fit ​​assembly according to any one of claims 1 to 3, characterized in that, Multiple evenly distributed wedge-shaped protrusions (14) are integrally formed on the outer periphery of the substrate (4) to snap the substrate (4) into the hole (15) of the body component (3).

7. An interior trim fastening system for fixing to a body component (3), the interior trim fastening system comprising a fastening assembly according to any one of claims 1 to 6 pre-assembled on the body component (3) and an interior trim having a columnar body (21) capable of being inserted into an insert (5) of the fastening assembly and capable of engaging with the insert (5) to position the interior trim on the body component (3).

8. The interior trim fastening system according to claim 7, characterized in that, The width of the column (21) is less than the width of the insert (5) and greater than the width of the gap between the insert and the substrate.

9. The interior trim fastening system according to claim 7, characterized in that, When the interior trim (2) has been installed on the body part (3), there can be a gap between the first bottom (7) of the insert (5) and the second bottom (16) of the base (4), and there can also be a gap between the first flange (10, 11) of the insert (5) and the second flange (18) of the base (4).

10. The interior trim fastening system according to any one of claims 7 to 9, characterized in that, Ribs are provided on the columnar body (21).

11. The interior trim fastening system according to any one of claims 7 to 9, characterized in that, The columnar body (21) is formed by gradually tapering at the end away from the interior trim (2).

12. A method for fastening interior trim to a body component using a snap-fit ​​assembly according to any one of claims 1 to 6, the method comprising the following steps: An insert (5) made of metal sheet and configured as a spring sheet is inserted into a base (4) made of plastic and a corresponding snap-fit ​​part provided on the insert (5) is inserted from the back of the snap-fit ​​part provided on the base (4), so that the base (4) and the insert (5) form a snap-fit ​​assembly pre-assembled together. The buckle assembly is inserted into the hole (15) in the body component (3); The columnar body (21) of the interior trim (2) is embedded into the insert (5) and engages with the insert.

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