Fastening clip

Abstract

The utility model provides a kind of fastening clamp.The fastening clamp is suitable for fastening the first component including the clamp seat to the second component including the mounting hole.The fastening clamp is suitable for receiving and mounting to the clamp seat, and is inserted and kept in the mounting hole.The fastening clamp defines a center line and includes: a base including two side portions on both sides of the center line;At least two engagement arms, each of the at least two engagement arms extends from the corresponding side portion of the base and is suitable for engaging the periphery of the mounting hole;Wherein, the inner surface of the engagement arm meets the inner surface of the side portion of the base and forms a planar transition at the meeting place.The root of the engagement arm of the above-mentioned fastening clamp is not easy to break or tear, so that the fastening clamp has better external force performance and structural reliability.

Description

Technical Field

[0001] This utility model relates generally to the field of fastener technology, and more specifically to a fastening clip for fastening two components together. Background Technology

[0002] In the field of automotive technology, it is often necessary to attach trim panels to the body panels using fasteners. A common fastener is a fastening clip, which is first installed on the trim panel and then inserted into an opening in the body panel to secure the trim panel to the body panel. Ideally, the fastening clip should insert smoothly into the opening in the body panel to complete the installation. It is also desirable that the fastening clip is not easily broken under external forces (e.g., accidental pull-out forces) to ensure reliable fastening of the trim panel. Utility Model Content

[0003] The purpose of this invention is to solve at least some of the problems existing in the prior art and to propose an improved fastening clip.

[0004] To this end, the present invention provides a fastening clip adapted to fasten a first member including a clip seat to a second member including a mounting hole. The fastening clip is adapted to receive and install into the clip seat and to insert into and retain in the mounting hole. The fastening clip defines a centerline and includes: a base including two side portions located on both sides of the centerline; and at least two engaging arms, each of the at least two engaging arms extending from a corresponding side portion of the base and adapted to engage the periphery of the mounting hole; wherein the inner surface of the engaging arm abuts the inner surface of the side portion of the base and forms a planar transition portion at the abutment.

[0005] Based on the above technical concept, the present invention may further include any one or more of the following optional embodiments.

[0006] In some alternative embodiments, the inner surface of the engagement arm includes a first surface portion that contacts the inner surface of the side portion of the base, wherein the first surface portion and the inner surface of the side portion of the base extend in the same plane.

[0007] In some alternative embodiments, the engaging arm includes a first segment and a second segment that are abutted to each other and angled to each other, wherein the first segment extends from the side of the base and the second segment is adapted to engage the periphery of the mounting hole when the fastening clip is inserted into the mounting hole.

[0008] In some alternative embodiments, the inner surface of the first segment includes a first surface portion and a second surface portion that are adjacent to each other and at an angle to each other. The first surface portion is adjacent to the inner surface of the side portion of the base. The second surface portion extends between the inner surface of the second segment and the first surface portion. The angle between the second surface portion and the centerline is in the range of 19° to 22°.

[0009] In some alternative embodiments, the junction of the first surface portion and the second surface portion is spaced apart from the side portion of the base.

[0010] In some alternative embodiments, the engaging arm includes a protrusion disposed on the outer surface of the engaging arm and located at the junction of the first segment and the second segment, to prevent the fastening clip from being pulled out of the mounting hole when the fastening clip is inserted into the mounting hole.

[0011] In some alternative embodiments, the protrusion includes a stop surface configured to abut against the periphery of the mounting hole to stop movement of the fastening clip in a direction opposite to the insertion direction of the fastening clip into the mounting hole, wherein the angle between the stop surface and a plane perpendicular to the centerline is in the range of 30° to 50°.

[0012] In some alternative embodiments, the fastening clip includes two engaging wings that extend from two sides of the base and define a receiving channel therebetween for receiving the clip seat, wherein each engaging wing includes two engaging arms spaced apart from each other and a connecting segment that joins the ends of the two engaging arms away from the base together.

[0013] In some alternative embodiments, the distance between the edge of the inner surface of the connecting segment away from the base and the centerline is in the range of 2.9 mm to 3.2 mm.

[0014] In some alternative embodiments, the clip holder includes an opening, wherein the fastening clip includes a retaining arm extending from the connecting segment toward the centerline and toward the base, wherein the free end of the retaining arm is adapted to engage with the opening.

[0015] In some alternative embodiments, the inner surface of the retaining arm includes a first surface segment and a second surface segment that are abutted to each other and at an angle to each other. The first surface segment is located at the free end of the retaining arm, and the second surface segment extends from the inner surface of the connecting segment. The junction of the first surface segment and the second surface segment is rounded, and / or the angle between the first surface segment and the centerline is in the range of 45° to 55°.

[0016] In some alternative embodiments, the fastening clip further includes an abutment arm that extends from a side of the base toward the retaining arm and is adapted to abut against a side of the clip seat, wherein the distance between the free end of the retaining arm and the free end of the abutment arm is in the range of 0.6 mm to 0.8 mm in the direction of extension of the centerline.

[0017] In some alternative embodiments, the inner surface of the connecting arm includes a plurality of bends, all of which are rounded.

[0018] In some alternative embodiments, the base has a U-shape to receive the free end of the clip holder.

[0019] According to this utility model, the inner surface of the engaging arm of the fastening clip forms a planar transition portion at the junction with the inner surface of the side portion of the base. This reduces stress concentration at the junction of the inner surface of the engaging arm and the inner surface of the side portion of the base when the fastening clip is subjected to an unexpected external force (such as an unexpected pull-out force) that causes the engaging arm to deform in a direction away from the centerline (i.e., deform outward). This reduces the risk of tearing / breakage at the root of the engaging arm (i.e., the part connected to the side portion of the base), resulting in better resistance to external forces and structural reliability of the fastening clip. Attached Figure Description

[0020] Other features and advantages of this utility model will be better understood through the following detailed description of optional embodiments in conjunction with the accompanying drawings, in which the same reference numerals identify the same or similar parts, wherein: Figure 1 This is a perspective view of the fastening clip according to an exemplary embodiment of the present utility model; Figure 2 This is a side view of the fastening clip according to an exemplary embodiment of the present invention; Figure 3A This is another side view of the fastening clip according to an exemplary embodiment of the present invention; Figure 3B It is along Figure 3A A sectional view cut by line AA; and Figures 4 to 6This is a schematic diagram of different stages in which the fastening clip, according to an exemplary embodiment of the present invention, fastens two components together. Detailed Implementation

[0021] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of specific ways of implementing and using this utility model, and are not intended to limit the scope of this utility model. In the description, the structural positions of the various components, such as upper, lower, top, bottom, etc., are not absolute, but relative. These orientations are appropriate when the various components are arranged as shown in the figures, but these orientations change accordingly when the positions of the various components in the figures change.

[0022] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In this utility model, unless otherwise expressly specified, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The terminology used herein is for the purpose of describing specific aspects of this disclosure only and is not intended to limit the invention. It should be emphasized that, when used in this specification, the term "comprising / including" is used to indicate the presence of a said feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, components, or groups thereof. As used herein, the singular forms "a," "an," and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0024] Figures 1 to 6 A fastening clip 100 according to an exemplary embodiment of the present invention is shown. The fastening clip 100 can fasten a first member 200 to a second member 300. The first member 200 includes a clip seat 204 having an opening 202, and the second member 300 includes a mounting hole 302. The fastening clip 100 defines a centerline C and includes a base 102 and at least two engaging arms 104. The base 102 includes two side portions 106 located on either side of the centerline C. Each of the at least two engaging arms 104 extends from a corresponding side portion 106 of the base 102 and is adapted to engage the periphery of the mounting hole 302. The inner surface of the engaging arm 104 abuts against the inner surface 107 of the side portion 106 of the base 102 and forms a planar transition portion 108 at the abutment.

[0025] In the illustrated embodiment, the fastening clip 100 defines a receiving channel 110 for receiving the clip seat 204 of the first member 200. In this application, unless otherwise stated, the inner side or inner surface of a structure of the fastening clip 100 refers to the side or surface of that structure facing the receiving channel 110 / centerline C, and the outer side or outer surface of that structure refers to the side or surface of that structure facing away from the receiving channel 110 / centerline C. In this application, unless otherwise stated, various parameters (e.g., angles, spacing, etc.) of various parts of the fastening clip 100 refer to parameters of the fastening clip 100 in its initial / unused / uninstalled state.

[0026] The planar transition portion 108 formed at the junction of the inner surface of the engaging arm 104 of the fastening clip 100 and the inner surface 107 of the side portion 106 of the base 102 can reduce stress concentration at the junction of the inner surface of the engaging arm 104 and the inner surface 107 of the side portion 106 of the base 102 when the fastening clip 100 is subjected to an external force (e.g., a pull-out force) and the engaging arm 104 tends to deform in a direction away from the center line C (i.e., deform outwards). This reduces the risk of tearing / breakage at the root of the engaging arm 104 (i.e., the part connected to the side portion 106 of the base 102).

[0027] Reference Figures 1 to 3B as well as Figure 6 The first component 200 may include a plate-like body 206 and a clip seat 204 extending from the plate-like body 206. The clip seat 204 may have a generally sheet-like shape and extend generally perpendicular to the plate-like body 206. The first component 200 may also include a limiting portion 208 extending generally perpendicularly from the plate-like body 206 for limiting the insertion depth of the fastening clip 100 in the mounting hole 302. The second component 300 may also have a plate-like shape. In one application scenario, the first component 200 may be, for example, a trim panel of a vehicle, and the second component 300 may be, for example, a body panel. It is conceivable that the application of the fastening clip 100 is not limited to this, but can be used for fastening between two components in various industries.

[0028] Reference Figures 4 to 6 During the fastening process of the first component 200 and the second component 300, the fastening clip 100 can first be installed onto the clip seat 204 of the first component 200. At this time, the clip seat 204 is inserted into and held in the receiving channel 110 of the fastening clip 100. Then, the fastening clip 100 is inserted into the mounting hole 302 of the second component 300. When the fastening clip 100 is fully inserted into the mounting hole 302, the first component 200 is fastened to the second component 300.

[0029] The fastening clip 100 can be made of plastic and is injection molded. (See reference...) Figures 1 to 3B as well as Figure 6 In the illustrated embodiment, the base 102 of the fastening clip 100 may have a U-shape to receive and retain the free end 210 of the clip seat 204 when the clip seat 204 of the first member 200 is inserted into the receiving channel 110 of the fastening clip 100, thereby facilitating the stable retention of the clip seat 204 in the receiving channel 110. The base 102 in Figure 3A and Figure 3B It is enclosed in a dashed box.

[0030] In the illustrated embodiment, the fastening clip 100 may include two engaging wings 112. Each engaging wing 112 may include two engaging arms 104 spaced apart from each other and a connecting segment 114 connecting the ends of the two engaging arms 104 away from the base 102 together. The two engaging arms 104 and the connecting segment 114 of each engaging wing 112 are connected to the top edge of the side portion 106 of the base 102 (the top edge of the side portion 106 of the base 102 is located at...). Figure 1 The long dashed line in the middle and Figure 3A The top edge of the dashed box in the image defines window 113.

[0031] The two engaging wings 112 can be symmetrically arranged relative to the center line C. The two engaging wings 112 define a receiving channel 110 for inserting the card holder 204. The distance between the connecting section 114 of the engaging wings 112 and the center line C determines the entrance size of the receiving channel 110. Preferably, as shown... Figure 2 As shown, the distance D1 between the edge 115 of the inner surface of the connecting segment 114 of the engaging wing 112, away from the base 102, and the centerline C is in the range of 2.9 mm to 3.2 mm. This is to prevent mechanical interference between the connecting segment 114 of the engaging wing 112 and the clip seat 204, which would affect the insertion of the fastening clip 100, when the engaging wing 112 deforms inward during insertion into the mounting hole 302 of the second member 300. It is conceivable that in some other embodiments not shown, the fastening clip may include other suitable numbers of engaging wings; each engaging wing may include other suitable numbers of engaging arms.

[0032] In the illustrated embodiment, each engaging arm 104 may include a first segment 116 and a second segment 118 that are abutted against each other and angled to each other. The first segment 116 may extend from the side 106 of the base 102. The second segment 118 may engage the periphery of the mounting hole 302 of the second member 300 when the fastening clip 100 is inserted into the mounting hole 302 of the second member 300 to mount / attach / retain the fastening clip 100 to the second member 300. The first segment 116 and the second segment 118 may form an obtuse angle. During the insertion of the fastening clip 100 into the mounting hole 302 of the second member 300, the first segment 116 first contacts and is pressed against the periphery of the mounting hole 302 to deform the engaging arm 104 toward the centerline C, thereby allowing the connection between the first segment 116 and the second segment 118 to move smoothly across the periphery of the mounting hole 302. When the limiting part 208 of the first component 200 abuts against the second component 300, the fastening clip 100 is inserted into the mounting hole 302. At this time, the second part 118 engages with the periphery of the mounting hole 302, so that the fastening clip 100 is held in the mounting hole 302, thereby fastening the first component 200 to the second component 300.

[0033] In the illustrated embodiment, the inner surface of the first segment 116 includes a first surface portion 119 and a second surface portion 120 that are adjacent to each other and at an angle to each other. The first surface portion 119 and the second surface portion 120 may form an obtuse angle. The first surface portion 119 is in contact with the inner surface 107 of the side portion 106 of the base 102. Figure 1 and Figure 3B As shown, a planar transition portion 108 is formed at the junction of the first surface portion 119 and the inner surface 107 of the side portion 106 of the base 102. More specifically, the first surface portion 119 and the inner surface 107 of the side portion 106 of the base 102 extend in the same plane. The second surface portion 120 extends between the inner surface of the second segment 118 and the first surface portion 119 and forms an angle with the first surface portion 119. The junction 122A of the first surface portion 119 and the second surface portion 120 is spaced apart from the bottom edge of the window 113 (that is, the top edge of the side portion 106 of the base 102). By positioning the junction 122A of the angled first surface portions 119 and second surface portions 120 away from the bottom edge of the window 113, tearing / breakage along the junction 122A of the first surface portions 119 and second surface portions 120 from the bottom edge of the window 113 can be prevented when the engaging arm 104 is deformed outward by an unexpected external force, thereby improving the pull-out resistance of the fastening clip 100. The junction 122A of the first surface portions 119 and second surface portions 120 can be rounded to further reduce the risk of tearing / breakage at the junction 122A. Figure 2As shown, the angle α between the second surface portion 120 and the centerline C of the fastening clip 100 is in the range of 19° to 22°. In the illustrated embodiment, the inner surface of the engaging arm 104 includes multiple bends 122A, 122B, and 122C (one of which is the junction 122A between the first surface portion 119 and the second surface portion 120). All bends are rounded to reduce stress concentration and prevent breakage of the engaging arm 104 when it deforms outward under stress, thereby improving the toughness of the fastening clip 100. The radius of the rounding can be greater than or equal to 1.5 mm.

[0034] In the illustrated embodiment, the engaging arm 104 includes a protrusion 124. The protrusion 124 is disposed on the outer surface of the engaging arm 104 and located at the junction of the first segment 116 and the second segment 118, to prevent the fastening clip 100 from being pulled out of the mounting hole 302 when the fastening clip 100 is inserted into the mounting hole 302, thereby increasing the pull-out force of the fastening clip 100 and effectively preventing the fastening clip 100 from being accidentally pulled out when subjected to external factors such as vibration or impact. The protrusion 124 includes a stop surface 125, which is configured to abut against the periphery of the mounting hole 302 to stop the movement of the fastening clip 100 in a direction opposite to the insertion direction of the fastening clip 100 into the mounting hole 302, thereby preventing the fastening clip 100 from disengaging from the mounting hole 302. The stop surface 125 is perpendicular to the plane perpendicular to the centerline C (in... Figure 2 The angle γ formed by the plane (with the horizontal plane in the middle) is in the range of 30° to 50°.

[0035] In the illustrated embodiment, the fastening clip 100 may further include two retaining arms 126. The two retaining arms 126 may be symmetrically arranged relative to the centerline C. Each retaining arm 126 extends from the connecting segment 114 of the corresponding engaging wing 112 toward the centerline C and toward the base 102. Each retaining arm 126 may be located between the two engaging arms 104 of the corresponding engaging wing 112.

[0036] Reference Figure 1 and Figure 2 as well as Figures 4 to 5During the insertion of the clip seat 204 of the first component 200 into the receiving channel 110 of the fastening clip 100, the free end 210 of the clip seat 204 is guided by the inner surface of the retaining arm 126 to facilitate smooth insertion of the clip seat 204 into place. The inner surface of the retaining arm 126 may include a first surface segment 128 and a second surface segment 130 that are abutted against each other and angled to each other. The first surface segment 128 and the second surface segment 130 may form an obtuse angle. The first surface segment 128 is located at the free end of the retaining arm 126, and the second surface segment 130 extends from the inner surface of the connecting segment 114. The angle β formed by the first surface segment 128 and the centerline C is in the range of 45° to 55°, such that a smaller insertion force is required when the clip seat 204 slides along the first surface segment 128 during insertion into the receiving channel 110, thus facilitating smooth insertion of the clip seat 204. Preferably, the junction of the first surface segment 128 and the second surface segment 130 is rounded, and the radius of the rounding can be greater than or equal to 1.5 mm. This is particularly advantageous when the clip holder 204 is inserted at an angle relative to the center line C and contacts the second surface segment 130 of the retaining arm 126, allowing the free end 210 of the clip holder 204 to be smoothly guided from the second surface segment 130 of the retaining arm 126 to the first surface segment 128, reducing the resistance when the clip holder 204 is inserted.

[0037] Reference Figure 1 , Figure 2 and Figure 6 The free end of the retaining arm 126 can engage with the opening 202 of the clip holder 204 to secure the clip 100 on / attached to / retained on the clip holder 204. The free end of the retaining arm 126 may include a first finger 132 and a second finger 134. When the clip holder 204 of the first member 200 is inserted into the receiving channel 110 of the securing clip 100 (the free end 210 of the clip holder 204 is received by the base 102), the first finger 132 is inserted into the opening 202 of the clip holder 204 to engage with the inner edge of the opening 202, and the second finger 134 engages with the outer periphery of the opening 202 to prevent the clip holder 204 from being pulled out of the receiving channel 110, thereby securing the clip 100 on / attached to / retained on the clip holder 204.

[0038] Continue to refer to Figure 1 , Figure 2 and Figure 6The fastening clip 100 may further include two abutment arms 136. The two abutment arms 136 extend from the two sides 106 of the base 102 toward the corresponding retaining arms 126. The two abutment arms 136 may be symmetrically arranged relative to the centerline C. Each abutment arm 136 may be located between the two engaging arms 104 of the corresponding engaging wing 112. When the clip seat 204 of the first member 200 is inserted into the receiving channel 110 of the fastening clip 100, the two abutment arms 136 may abut against the opposite two sides of the clip seat 204. Thus, the two abutment arms 136 can hold the clip seat 204 therebetween, which helps to centrally hold the clip seat 204 in the receiving channel 110 of the fastening clip 100, preventing the clip seat 204 from tilting relative to the receiving channel 110 / centerline C, thereby helping the first member 200 and the second member 300 maintain the correct positional relationship. Each abutment arm 136 may include an abutment surface 138 adapted to abut against the side of the card holder 204. The abutment surface 138 may have an arcuate shape to allow the card holder 204 to be smoothly inserted between the two abutment arms 136.

[0039] Optionally, in the direction of extension of the centerline C of the fastening clip 100, the distance D2 between the free end of each retaining arm 126 (more specifically, the end of the second finger 134) and the free end of the corresponding abutment arm 136 is in the range of 0.6 mm to 0.8 mm, so as to avoid the retaining arm 126 contacting the abutment arm 136 and generating abnormal noise during the installation or use of the fastening clip 100.

[0040] It should also be understood that the various components and features described herein may be made of a variety of materials, including but not limited to polymers, rubber, metals, and other suitable materials or combinations thereof known to those skilled in the art. Figures 1 to 6 The embodiments shown only illustrate the shape, quantity, size and arrangement of the various optional components of the fastening clip according to the present invention. However, they are only illustrative and not limiting. Other shapes, sizes and arrangements may be adopted without departing from the spirit and scope of the present invention.

[0041] The technical content and features of this utility model have been disclosed above. However, it is understood that, under the inventive concept of this utility model, those skilled in the art can easily make modifications, variations, and equivalents of these embodiments based on the disclosed content. For example, features shown or described as part of one embodiment can be used with another embodiment to produce yet another embodiment. This disclosure is intended to cover these modifications, variations, and equivalents. The description of the above embodiments is exemplary and not restrictive, and the scope of protection of this utility model is determined by the claims.

Claims

1. A fastening clip (100) adapted to fasten a first member (200) including a clip seat (204) to a second member (300) including a mounting hole (302), the fastening clip (100) being adapted to receive and mount to the clip seat (204) and to be inserted into and held in the mounting hole (302), characterized in that, The fastening clip (100) defines a centerline (C) and includes: Base (102), the base (102) including two side portions (106) located on both sides of the centerline (C); and At least two engagement arms (104), each of the at least two engagement arms (104) extending from a corresponding side (106) of the base (102) and adapted to engage the periphery of the mounting hole (302); The inner surface of the connecting arm (104) is in contact with the inner surface (107) of the side portion (106) of the base (102) and a planar transition portion (108) is formed at the contact point.

2. The fastening clip (100) according to claim 1, characterized in that, The inner surface of the connecting arm (104) includes a first surface portion (119) which is in contact with the inner surface (107) of the side portion (106) of the base (102), wherein the first surface portion (119) and the inner surface (107) of the side portion (106) of the base (102) extend in the same plane.

3. The fastening clip (100) according to claim 1, characterized in that, The engaging arm (104) includes a first segment (116) and a second segment (118) that are connected to each other and at an angle to each other, wherein the first segment (116) extends from the side (106) of the base (102) and the second segment (118) is adapted to engage the periphery of the mounting hole (302) when the fastening clip (100) is inserted into the mounting hole (302).

4. The fastening clip (100) according to claim 3, characterized in that, The inner surface of the first segment (116) includes a first surface portion (119) and a second surface portion (120) that are adjacent to each other and at an angle to each other. The first surface portion (119) is adjacent to the inner surface (107) of the side portion (106) of the base (102). The second surface portion (120) extends between the inner surface of the second segment (118) and the first surface portion (119). The angle (α) between the second surface portion (120) and the centerline (C) is in the range of 19° to 22°.

5. The fastening clip (100) according to claim 4, characterized in that, The junction (122A) of the first surface portion (119) and the second surface portion (120) is spaced apart from the side portion (106) of the base portion (102).

6. The fastening clip (100) according to claim 3, characterized in that, The connecting arm (104) includes a protrusion (124) disposed on the outer surface of the connecting arm (104) and located at the junction of the first segment (116) and the second segment (118) to prevent the fastening clip (100) from being pulled out of the mounting hole (302) when the fastening clip (100) is inserted into the mounting hole (302).

7. The fastening clip (100) according to claim 6, characterized in that, The protrusion (124) includes a stop surface (125) configured to abut against the periphery of the mounting hole (302) to stop the movement of the fastening clip (100) in a direction opposite to the insertion direction of the fastening clip (100) into the mounting hole (302), wherein the angle (γ) between the stop surface (125) and the plane perpendicular to the center line (C) is in the range of 30° to 50°.

8. The fastening clip (100) according to claim 1, characterized in that, The fastening clip (100) includes two engaging wings (112) that extend from two sides (106) of the base (102) and define a receiving channel (110) therebetween for receiving the clip seat (204). Each engaging wing (112) includes two engaging arms (104) spaced apart from each other and a connecting section (114) that joins the ends of the two engaging arms (104) away from the base (102) together.

9. The fastening clip (100) according to claim 8, characterized in that, The distance (D1) between the edge (115) of the inner surface of the connecting section (114) away from the base (102) and the center line (C) is in the range of 2.9 mm to 3.2 mm.

10. The fastening clip (100) according to claim 8, characterized in that, The clip holder (204) includes an opening (202), wherein the fastening clip (100) includes a retaining arm (126) extending from the connecting segment (114) toward the centerline (C) and toward the base (102), wherein the free end of the retaining arm (126) is adapted to engage with the opening (202).

11. The fastening clip (100) according to claim 10, characterized in that, The inner surface of the retaining arm (126) includes a first surface segment (128) and a second surface segment (130) that are connected to each other and at an angle to each other. The first surface segment (128) is located at the free end of the retaining arm (126), and the second surface segment (130) extends from the inner surface of the connecting segment (114). The junction of the first surface segment (128) and the second surface segment (130) is rounded, and / or the angle (β) between the first surface segment (128) and the center line (C) is in the range of 45° to 55°.

12. The fastening clip (100) according to claim 10, characterized in that, The fastening clip (100) further includes an abutment arm (136) that extends from the side (106) of the base (102) toward the retaining arm (126) and is adapted to abut against the side of the clip seat (204), wherein the distance (D2) between the free end of the retaining arm (126) and the free end of the abutment arm (136) in the direction of extension of the centerline (C) is in the range of 0.6 mm to 0.8 mm.

13. The fastening clip (100) according to any one of claims 1 to 12, characterized in that, The inner surface of the connecting arm (104) includes a plurality of bends, all of which are rounded.

14. The fastening clip (100) according to any one of claims 1 to 12, characterized in that, The base (102) has a U-shaped form to receive the free end (210) of the clip seat (204).

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