Fastening clip

Abstract

To provide an easy-to-mount and firm fastening clip.SOLUTION: The present application provides a fastening clip, which comprises a fastening pin 110 and a fastening sleeve 120. The fastening pin can be inserted into the fastening sleeve, the fastening sleeve comprises a base 301 and two pairs of retaining wings 311, 312, 313, 314, the two pairs of retaining wings respectively extend downward from a lower surface of the base, and outer sides of at least one of the two pairs of retaining wings have raised ribs extending in a circumferential direction. The fastening clip of the present application can firmly fasten at least two plates.SELECTED DRAWING: Figure 1A

Description

[Technical field]

[0001] The present application relates to fastening clips, and in particular to fastening clips for fastening two or more plates. [Background technology]

[0002] In industrial applications, for example in the automotive industry, it may be desirable to use fastening clips to securely join two or more plates. One solution is to drill holes in the plates to be joined and insert the fastening clip into the holes in the plates to be joined. The fastening clip has an elastic fastening element. The elastic fastening element is in a contracted state before being inserted into the plates to be joined. Once fully inserted into the plates to be joined, the elastic fastening element expands outwardly and abuts against the plates, thereby firmly joining the two or more plates. Summary of the Invention

[0003] The present application provides a fastening clip that is easy to install and strong. The fastening clip comprises: a fastening pin having a head and a pin portion extending downward from the head and having a retaining portion formed at a distal end thereof; a fastening sleeve having a base portion and two pairs of retaining wings, each of the two pairs of retaining wings being disposed opposite one another, the base portion having a hole into which the pin portion can be removably inserted, the two pairs of retaining wings each extending downwardly from a lower surface of the base portion and distributed circumferentially around a center of the hole, the inner surface of a lower portion of each of the two pairs of retaining wings being inwardly inclined to form a clamping portion cooperating with the retaining portion of the fastening pin, and the outer surface of at least one of the two pairs of retaining wings having a circumferentially extending raised rib.

[0004] According to this fastening clip, the two pairs of retention wings include a pair of first retention wings and a pair of second retention wings, the pair of first retention wings being provided with a raised rib adjacent to an upper end of the pair of first retention wings, and the pair of second retention wings being provided with a raised rib adjacent to a lower end of the pair of second retention wings.

[0005] According to this fastening clip, the raised ribs at the upper ends of the first pair of retaining wings are positioned to contact at least two plates of a first thickness so as to fasten the at least two plates of the first thickness together by the fastening clip, and the raised ribs at the lower ends of the second pair of retaining wings are positioned to contact at least two plates of the second thickness so as to fasten the at least two plates of the second thickness together by the fastening clip.

[0006] According to this fastening clip, the pair of second clamping portions of the two pairs of retaining wings are arranged so that the thickness of the clamping portion of the pair of second retaining wings is smaller than the thickness of the clamping portion of the pair of first retaining wings in the same radial portion.

[0007] According to this fastening clip, in the same radial portion, the distance between the outer surfaces of the clamping portions of the first pair of retaining wings of the two pairs of retaining wings is smaller than the distance between the outer surfaces of the clamping portions of the second pair of retaining wings, and the distance between the inner surfaces of the clamping portions of the first pair of retaining wings of the two pairs of retaining wings is greater than the distance between the inner surfaces of the clamping portions of the second pair of retaining wings.

[0008] According to this fastening clip, a claw that abuts against the holding portion is provided on the inner surface of the clamp portion, and the raised rib at the lower end of the pair of second holding wings is located above the claw.

[0009] According to this fastening clip, the raised ribs at the upper ends of the pair of first retention wings have a distance D from the lower surface of the base portion.

[0010] According to this fastening clip, the raised rib has an upper bevel that slopes downwardly and outwardly.

[0011] According to this fastening clip, the raised rib includes two raised ribs arranged side by side.

[0012] According to this fastening clip, a guide rib is arranged on the outer surface of the pin portion and a guide groove is provided in the hole, and when the pin portion is inserted into the hole, the guide rib is arranged in the guide groove, preventing the fastening pin from rotating relative to the fastening sleeve.

[0013] The fastening clip of the present application can be adapted to plates of different thicknesses, so that when the fastening clip clamps at least two thin plates of a first thickness, the fastening force of the fastening clip on the at least two plates is improved to prevent the two plates from wobbling, and when the fastening clip clamps at least two thick plates of a second thickness, a relatively small insertion force is required, but a fastening force that meets the requirements is guaranteed. [Brief description of the drawings]

[0014] [Figure 1A] FIG. 2 is a perspective view of a fastening clip according to the present application. [Figure 1B] FIG. 1B is an exploded view of the fastening clip of FIG. 1A. [Figure 2A] FIG. 1C is a perspective view of the fastening pin of FIG. [Figure 2B] FIG. 1C is a bottom view of the fastening pin of FIG. [Figure 2C] FIG. 2C is a cross-sectional view of the fastening pin taken along line AA of FIG. 2B. [Figure 2D] FIG. 2C is a cross-sectional view of the fastening pin taken along line BB in FIG. 2B. [Figure 3A] FIG. 1C is a perspective view of the fastening sleeve of FIG. [Figure 3B] FIG. 1C is a top view of the fastening sleeve of FIG. [Figure 3C] FIG. 3C is a cross-sectional view of the fastening sleeve taken along line DD in FIG. 3B. [Figure 3D] FIG. 3C is a cross-sectional view of the fastening sleeve taken along line EE of FIG. 3B. [Figure 3E] FIG. 3E is a cross-sectional view of the fastening sleeve taken along line FF in FIG. 3D. [Figure 4] FIG. 2 is a perspective view of two plates of a first thickness (total thickness). [Figure 5A] FIG. 2 is a radial cross-sectional view showing the fastening clip being inserted into two plates of a first thickness in a ready position. [Figure 5B] FIG. 2 is a schematic cross-sectional view showing the relationship between a fastening clip in a functional position and two plates of a first thickness. [Figure 6] FIG. 13 is a perspective view of two plates of a second thickness. [Figure 7A] FIG. 13 is a radial cross-sectional view showing the fastening clip being inserted into two plates of a second thickness in a ready position. [Figure 7B] FIG. 2 is a schematic cross-sectional view showing the relationship between the fastening clip in a functional position and two plates of a second thickness. [Figure 8] FIG. 13 is a perspective view of a fastening clip according to another embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Various specific embodiments of the present invention are described below with reference to the accompanying drawings, which form a part of this specification. Although directional terms such as "front", "back", "upper", "lower", "left" and "right" are used in this application to describe various exemplary structures and elements in this application, it should be understood that these terms used in this specification are used merely for ease of description and are determined based on the exemplary orientation shown in the accompanying drawings. Since the embodiments disclosed in this application can be arranged in different orientations, these directional terms are merely exemplary and should not be considered limiting. Where possible, the same or similar reference numbers used in this application refer to the same components.

[0016] FIG. 1A is a perspective view of a fastening clip according to the present application, and FIG. 1B is an exploded view of the fastening clip of FIG. 1A. As shown in FIGS. 1A and 1B, the fastening clip 100 is used to fasten two or more stacked plates. The fastening clip 100 includes a fastening pin 110 and a fastening sleeve 120. The fastening clip 100 has a central axis C. The fastening pin 110 can be inserted into the fastening sleeve 120 and moved relative to the fastening sleeve 120 in the direction of the central axis. The fastening clip 100 has a ready position and a working position. FIG. 1A shows the ready position of the fastening clip 100. The fastening pin 110 is continuously pressed toward the fastening sleeve 120 to reach the working position of the fastening clip 100. In the ready position of the fastening clip 100, the fastening clip 100 can be inserted into holes of at least two plates to be fastened. In the working position of the fastening clip 100, the fastening clip 100 fastens at least two plates. The structure and operation process of the fastening pin 110 and the fastening sleeve 120 will be described in detail below.

[0017] FIG 2A is a perspective view of the fastening pin of FIG 1B, FIG 2B is a bottom view of the fastening pin of FIG 1B, FIG 2C is a cross-sectional view of the fastening pin along line AA of FIG 2B, and FIG 2D is a cross-sectional view of the fastening pin along line BB of FIG 2B. As shown in FIG 2A-FIG 2D, the fastening pin 110 has a head 211 and a pin portion 212. The head 211 is substantially disc-shaped and has an upper surface 215 and a lower surface 216, and the pin portion 212 extends downwardly from the lower surface 216 of the head 211. The outer diameter of the head 211 is greater than the outer diameter of the pin portion 212, such that the fastening pin 110 is substantially in the shape of an open umbrella.

[0018] As shown in FIG. 2A to FIG. 2C, the pin portion 212 has an upper portion 230 and a lower portion 240, the upper portion 230 being connected to the head portion 211, and the lower portion 240 being located at the distal end of the pin portion 212. The lower portion 240 has a retaining portion 241 and a fastening pin guide portion 242, and the retaining portion 241 has a groove 245 recessed inward from the outer surface. The groove 245 has a groove bottom portion 247, an upper sidewall 248, and a lower sidewall 249, the upper sidewall 248 extending obliquely upward and outward from the groove bottom portion 247, and the included angle between the upper sidewall 248 and the groove bottom portion 247 is an obtuse angle. The lower sidewall 249 extends outward perpendicular to the groove bottom portion 247, and the included angle between the lower sidewall 249 and the groove bottom portion 247 is a right angle. The fastening pin guide portion 242 is located at the distal end of the lower portion 240, and the outer surface of the fastening pin guide portion 242 is inclined inwardly from top to bottom to form an inverted cone structure. The fastening pin guide portion 242 is used to guide the insertion of the fastening pin 110 into the fastening sleeve 120. Referring to FIG. 2A to FIG. 2C, the upper portion 230 has a central pillar 258 and four guide ribs 251, 252, 253, 254, which cooperate with the fastening sleeve 120 to prevent the fastening pin 110 from rotating relative to the fastening sleeve 120. The four guide ribs 251, 252, 253, 254 extend in the axial direction of the upper portion 230, respectively. The four guide ribs 251, 252, 253, 254 each protrude outward from the outer surface of the central post and are distributed circumferentially along the central axis C of the fastening clip 100. The guide ribs 252, 253, 254 have the same structure and are substantially elongated, and the distance from the outer surface of each of the guide ribs 252, 253, 254 to the central axis C is greater than the distance from the outer surface of the lower portion 240 of the pin portion 212 to the central axis. The outer surface of each of the lower portions of the guide ribs 252, 253, 254 slopes inwardly from top to bottom to form a transition portion 257, which is connected to the lower portion 240 of the pin portion 212. The guide rib 251 has an upper portion 262 and a lower portion 263. The upper portion 263 has a protuberance 265 and a cavity 266, and the protuberance 265 protrudes outward. The cavity 266 is located within the protuberance 265. The cavity 266 allows for some deformation of the upper portion 263 .When an external force is applied to the outer surface of the protuberance 265, the protuberance 265 can contract inward by pushing out the cavity 266. The lower portion 263 extends upward and outward from the junction of the upper portion 230 and the lower portion 240 to form a resilient arm 269. The resilient arm 269 is used to prevent the fastening pin 110 from slipping out of the fastening sleeve 120. An upper end of the resilient arm 269 extends vertically upward, and a top surface of the upper end of the resilient arm 269 forms a contact surface 268.

[0019] 3A is a perspective view of the fastening sleeve 120, and FIG. 3B is a top view of the fastening sleeve 120 of FIG. 3A. As shown in FIGS. 3A and 3B, the fastening sleeve 120 has a base portion 301 and two pairs of retaining wings 311, 312, 313, 314, and the base portion 301 is substantially disk-shaped and has an upper surface 302 and a lower surface 303. The two pairs of retaining wings 311, 312, 313, 314 are formed by extending downward from the lower surface 303 of the base portion 301. The center of the base portion 301 has a hole 305 penetrating the upper surface 302 and the lower surface 303 of the base portion for inserting the fastening pin 110. The center of the hole 305 is located on the central axis C of the fastening clip 100. The hole 305 has a central portion 307 and four protruding portions 321 protruding outwardly around the central portion 307, the four protruding portions 321 forming four guide grooves 323, the guide grooves 323 being distributed in a circumferential direction along the center of the hole 305 to accommodate the four guide ribs 251, 252, 253, 254 of the fastening pin 110. The shapes of the four guide grooves 323 match the shapes of the four guide ribs 251, 252, 253, 254. After the four guide ribs 251, 252, 253, 254 are inserted into the four guide grooves 323 respectively, the fastening pin 110 cannot rotate relative to the fastening sleeve 120. The upper surface 302 of the base portion 301 further has a pair of opposing recesses 351, 352, the recesses 351, 352 being formed by sloping outwardly and downwardly from the edge of the hole 305. When the fastening clip 100 reaches the functional position, the underside 216 of the head 211 of the fastening pin 110 is close to the upper side 302 of the base part 301, and the recesses 351, 352 provide an operating space between the underside 216 of the head 211 of the fastening pin 110 and the upper side 302 of the base part 301, which makes it easy to insert a tool into said operating space to pull out the fastening pin 110. When it becomes necessary to remove the fastening clip 100 from the fastened plate, an operating tool is inserted into the operating space between the recesses 351, 352 of the fastening sleeve 120 and the underside 216 of the head 211 of the fastening pin 110 to pull out the fastening pin 110 upwards. The fastening clip 100 then returns to the ready position, whereby the fastening clip 100 can be removed.The two pairs of retaining wings 311, 312, 313, 314 of the fastening sleeve 120 are made from a material that has a certain degree of elasticity, so that the fastening sleeve 120 can deform to a certain degree.

[0020] The two pairs of retaining wings 311, 312, 313, 314 include a pair of first retaining wings 311, 313 and a pair of second retaining wings 312, 314. The pair of first retaining wings 311, 313 have the same structure and are arranged symmetrically with respect to the central axis C of the fastening clip 100. A connecting line of the center lines of the pair of first retaining wings 311, 313 passes through the central axis. Similarly, the pair of second retaining wings 312, 314 have the same structure and are arranged symmetrically with respect to the central axis. A connecting line of the center lines of the pair of second retaining wings 312, 314 passes through the central axis. The two pairs of retention wings 311, 312, 313, 314 are evenly distributed around the central axis C of the fastening clip 100, i.e. the connecting line of the centerlines of the first pair of retention wings 311, 313 is perpendicular to the connecting line of the centerlines of the second pair of retention wings 312, 314.

[0021] FIG. 3C is a cross-sectional view taken along line DD in FIG. 3B, showing the structure of the pair of first retention wings 311, 313. Since the retention wings 311, 313 have a symmetrical structure, the specific structure of the pair of first retention wings 311, 313 will be described below by taking the retention wing 311 as an example. As shown in FIGS. 3A and 3C, the retention wing 311 has an upper retention wing portion 341a and a lower retention wing portion 342a, where the upper retention wing portion 341a is connected to the lower surface 303 of the base portion 301, and the lower retention wing portion 342a is located at the distal end of the retention wing 311. The upper retention wing portion 341a extends downward from the lower surface 303 of the base portion 301 and is substantially perpendicular to the base portion 301. The outer surface 371a of the retention wing upper part 341a has two circumferentially extending raised ribs 327e, 327f located at the end of the retention wing upper part 341a close to the base part 301, i.e., at the proximal end of the retention wing upper part 341a relative to the base part 301. The raised rib 327e is located above the raised rib 327f. In other embodiments, there may be one or more raised ribs. The raised rib 327e has an upper bottom part 332e and a top part 331e in succession from top to bottom, and the raised rib 327e smoothly transitions from the upper bottom part 332e to the top part 331e to form an upper bevel 328e. The upper bevel 328e is adapted to abut at least two plates of a first thickness. The upper bottom 332e of the raised rib 327e has a distance D from the lower surface 303 of the base portion 301, the distance D being set to be no greater than the total thickness of the two plates. Similarly, the raised rib 327f below the raised rib 327e also has an upper bevel 328f.

[0022] At least a portion of the retention wing lower portion 342a has a thickness greater than that of the retention wing upper portion 341a. The outer surface 346a of the lower portion of the retention wing lower portion 342a is inclined inwardly from top to bottom to form an inverted cone-shaped fastening sleeve guide portion 348a. The fastening sleeve guide portion 348a is used to guide the fastening clip 100 to be inserted into two or more plates (not shown) to be fastened. The inner surface 345a of the lower portion of the retention wing lower portion 342a is inclined inwardly from top to bottom to form a clamp portion 322a. The clamp portion 322a is used to cooperate with the retaining portion 241. A claw 361a is formed on the lower portion of the inner surface of the clamp portion 322, and the claw 361a can enter the groove 245 of the retaining portion 241 of the fastening pin 110.

[0023] Similar to retention wing 311, retention wing 313 has an upper retention wing portion 341b and a lower retention wing portion 342b. An outer surface 371b of retention wing upper portion 341b also has two raised ribs 327g, 327h. Raised rib 327g is located above raised rib 327h, which is symmetrical to raised rib 327e, which is symmetrical to raised rib 327f. Raised rib 327g has an upper bevel 328g and an apex 331g, and raised rib 327h has an upper bevel 328h and an apex 331h. An outer surface 346b of retention wing lower portion 342b has a fastening sleeve guide portion 348b. An inner surface 345b of the retention wing lower portion 342b has a clamping portion 322b, and a claw 361b is formed on the lower portion of the inner surface of the clamping portion 322b.

[0024] FIG. 3D is a cross-sectional view taken along line EE in FIG. 3B, showing the structure of the pair of second retention wings 312, 314. Since the retention wings 312, 314 have a symmetrical structure, the specific structure of the pair of second retention wings 312, 314 will be described below by taking the retention wing 312 as an example. As shown in FIGS. 3A and 3D, similar to the pair of first retention wings 311, 313, the retention wing 312 has an upper retention wing portion 341c and a lower retention wing portion 342c, and the upper retention wing portion 341c is connected to the lower surface 303 of the base portion 301. The lower retention wing portion 342c is located at the distal end of the retention wing 312. The upper retention wing portion 341c extends downward from the lower surface 303 of the base portion 301 and is substantially perpendicular to the base portion 301.

[0025] The thickness of at least a portion of the retention wing lower portion 342c is not smaller than the thickness of the retention wing upper portion 341c. The outer surface 346c of the lower portion of the retention wing lower portion 342c is inclined inwardly from top to bottom to form an inverted cone-shaped fastening sleeve guide portion 348c. The fastening sleeve guide portion 348c is used to guide the fastening clip 100 to be inserted into a plate (not shown) to be fastened. The inner surface 345c of the lower portion of the retention wing lower portion 342c is inclined inwardly from top to bottom to form a clamp portion 332c. The clamp portion 332c is used to cooperate with the retaining portion 241. A claw 361c is formed on the lower portion of the inner surface of the clamp portion 332c, and the claw 361c can enter the groove 245 of the retaining portion 241 of the fastening pin 110.

[0026] The outer surface 371c of the retention wing 312 has two circumferentially extending raised ribs 337e, 337f, which are located at the end of the lower retention wing 342c close to the upper retention wing 341c. That is, the raised rib 337e is near the junction of the upper retention wing 341c and the lower retention wing 342c. The two raised ribs 337e, 337f are provided to be higher than the claw 361c. Similarly, the two raised ribs 337e, 337f have crests 333e, 333f and upper bevels 329e, 329f, respectively, which are adapted to abut against at least two plates of the second thickness.

[0027] Similar to retention wing 312, retention wing 314 has upper retention wing portion 341d and lower retention wing portion 342d. Outer surface 371d of lower retention wing portion 342d also has two raised ribs 337g, 337h. Raised rib 337g is located above raised rib 337h, raised rib 337g is symmetrical to raised rib 337e, and raised rib 337h is symmetrical to raised rib 337f. Raised rib 337g has upper bevel 329g and crest 333g, and raised rib 337h has upper bevel 329h and crest 333h. Outer surface 346d of lower retention wing portion 342b has fastener sleeve guide portion 348d. An inner surface 345d of the retention wing lower portion 342d has a clamping portion 322d, and a claw 361d is formed on the lower portion of the inner surface of the clamping portion 322d.

[0028] The fastening sleeve guide portions 348a, 348b, 348c, 348d of the two pairs of retaining wings 311, 312, 313, 314 together form an inverted cone structure that gradually narrows from top to bottom, and is used to guide the fastening pin 110 when it is inserted into the fastening sleeve 120 and reaches the ready position of the fastening clip 100. In the ready position of the fastening clip 100, the claws 361a, 361b, 361c, 361d of the fastening sleeve 120 are located on the retaining portions 241 of the fastening pin 110.

[0029] At least a portion of the lower retention wing portion 342c of retention wing 312 has a thickness greater than a corresponding portion of the lower retention wing portion 342a of retention wing 311. That is, in some radial portions of the lower portion of fastening sleeve 120, the thickness of the pair of first retention wings 311, 313 is less than the thickness of the pair of second retention wings 312, 314. Figure 3E is a bottom-up cross-sectional view taken along line FF in Figure 3D. As shown in FIG. 3E, the circumferential diameter at the location where the inner surfaces of the clamping portions 322a, 322b of the pair of first retaining wings 311, 313 are located is larger than the circumferential diameter at the location where the inner surfaces of the pair of second retaining wings 312, 314 are located, and the circumferential diameter at the location where the outer surfaces of the clamping portions 322c, 322d of the pair of first retaining wings 311, 313 are located is smaller than the circumferential diameter at the location where the outer surfaces of the pair of second retaining wings 312, 314 are located. That is, in the cross-sectional view shown in Fig. 3E, the distance between the outer surfaces of the clamping portions 322a, 322b of the pair of first retention wings 311, 313 is smaller than the distance between the outer surfaces of the clamping portions 322c, 322d of the pair of second retention wings 312, 314, and the distance between the inner surfaces of the clamping portions of the pair of first retention wings 311, 313 in the two pairs of retention wings 311, 312, 313, 314 is larger than the distance between the inner surfaces of the clamping portions of the pair of second retention wings 312, 314. In other words, compared with the clamping portions of the pair of second retention wings 312, 314, the clamping portions of the pair of first retention wings 311, 313 are thinner from the inner and outer surfaces, respectively.

[0030] 1A, in the ready position of the fastening clip 100, the pin portion 212 of the fastening pin 110 is partially inserted into the fastening sleeve 120, and the holding portion 241 is located on the clamping portions 322a, 322b, 322c, 322d. The diameter of the cylindrical space surrounded by the upper portion of each of the two pairs of holding wings 311, 312, 313, 314 is not smaller than the outer diameter of the holding portion 241. Therefore, the holding portion 241 is close to the inner surface of the two pairs of holding wings 311, 312, 313, 314 or has a certain gap from the inner surface of the two pairs of holding wings 311, 312, 313, 314. The two pairs of holding wings 311, 312, 313, 314 are in a free state and are not clamped by an external force. At the same time, the contact surface 268 of the resilient arm 269 of the fastening pin 110 abuts against the underside of the base portion 301, thereby preventing the fastening pin 110 from slipping out of the fastening sleeve 120. The fastening clip 100 is held in the ready position prior to use.

[0031] FIG. 4 shows two plates with a first thickness (total thickness). As shown in FIG. 4, the total thickness of the first and second plates 401, 402 is the first thickness. The first and second plates 401, 402 with the first thickness cooperate with the raised ribs on the pair of first retaining wings 311, 313 to strengthen the fastening of the fastening clip 100 on the first and second plates 401, 402. The first and second plates 401, 402 have holes 411, 412, respectively. When the plates 401, 402 need to be fastened, first align the hole 411 with the hole 412, then insert the fastening clip 100 of FIG. 1A into the holes 411, 412, and press down the fastening pin 110 to fasten the plates 401, 402. The diameter of the holes 411, 412 is set to be equal to or slightly larger than the outer diameter of the fastening sleeve 120 of the fastening clip 100 in the ready position shown in Fig. 1A, so that the fastening clip 100 can be easily inserted into the holes 411, 412. The hole 412 of the lower second plate 402 matches the size of the fastening clip 100, so that when the fastening clip 100 is in the functional position, the fastening sleeve 120 can abut against the lower edge 419 of the hole 412 to fasten the first and second plates 401, 402.

[0032] Fig. 5A shows a cross-sectional view of the fastening clip 100 in the ready position, fitted between two plates of a first thickness. As shown in Fig. 5A, the fastening clip 100 is inserted into the hole 411 of the first plate 401 and the hole 412 of the second plate 402, and the upper surface of the first plate 401 contacts the lower surface 303 of the base portion 301. At this time, the fastening clip 100 is in the ready position, so that the fastening clip 100 can be easily slid into the hole 412 of the second plate. Also, at this time, the first and second plates 401, 402 are not fastened together.

[0033] 5B shows a cross-sectional view of the relationship between the fastening clip 100 and two plates of a first thickness in the functional position. As shown in FIG. 5B, the lower surface 216 of the head 211 of the fastening pin 110 is close to the upper surface 302 of the base part 301 of the fastening sleeve 120. At this time, the clamping parts 322a, 322b, 322c, 322d expand outward, so that the outer surface of each retaining wing contacts and abuts the lower edge 419 of the hole 412 of the second plate 402. Thus, the first and second plates 401, 402 are fastened. In the functional position of the fastening clip 100, the claws 361a, 361b, 361c, 361d of the fastening sleeve 120 enter the groove 245 of the retaining part 241 of the fastening pin 110 and abut the groove bottom 247. When the fastening pin 110 attempts to move upward relative to the fastening sleeve 120, the lower side wall 249 of the groove 245 can prevent the claws 361a, 361b, 361c, 361d from falling out of the groove 245, thereby maintaining the fastening clip 100 in the functional position.

[0034] As the fastening clip 100 changes from the ready position shown in FIG. 5A to the functional position shown in FIG. 5B, the operator presses down on the fastening pin 110, causing the retaining portion 241 to contact the inwardly inclined bevel of the clamping portion 322, and the retaining portion 241 to push the clamping portions 322a, 322b, 322c, 322d outward, causing each of the two pairs of retaining wings 311, 312, 313, 314 to deform and causing the outer surfaces of the upper portions of each of the two pairs of retaining wings 311, 312, 313, 314 to incline outward. When the fastening pin 110 reaches its functional position, the outer surfaces of each of the retaining wing upper parts 341a, 341b, 341c, 341d of the two pairs of retaining wings 311, 312, 313, 314 abut against the lower edge 419 of the hole 412 in the second plate 402, thereby pressing the first and second plates 401, 402 together to fasten the first and second plates 401, 402 together.

[0035] 5A and 5B, the total thickness of the at least two plates to be fastened is a first thickness, and the at least two plates of the first thickness increase the fastening force fastening the fastening clip 100 to the plates through the raised ribs 327e, 327f, 327g, 327h of the pair of first retention wings 311, 313. FIG 5B shows the relationship between the fastening clip 100 and the first and second plates 401, 402 in the functional position. As shown in Fig. 5B, when the fastening clip 100 is inserted into the hole 401 and the hole 412 and reaches the working position, the overlapping portion 501 of the second plate 402 shown in Fig. 5A and each of the two pairs of retaining wings 311, 312, 313, 314 deform and enter the hole 412, so that each of the two pairs of retaining wings 311, 312, 313, 314 applies a certain force to the second plate 402 and presses the second plate 402 and the first plate 401. In the fastening clip without the raised rib, the first and second plates 401, 402 of the first thickness are relatively thin, and the overlapping portion 501 is located at the end of the retaining wing upper portion 341a, 341b, 341c, 341d of the two pairs of retaining wings 311, 312, 313, 314 close to the base portion 301. Due to the relatively thin retaining wing upper portions 341a, 341b, 341c, 341d and the small overlapping portion 501, the portions of each of the two pairs of retaining wings 311, 312, 313, 314 close to the hole 412 are easily deformed, i.e., the force generated by the deformation of each retaining wing is small. After the fastening clip reaches the working position, the portions of each of the two pairs of retaining wings 311, 312, 313, 314 below the second plate 402 are pushed into the hole 412 by the lower edge 419 of the hole 412, and the first and second plates 401, 402 are loosened. In one embodiment of the present application, the outer surfaces of the pair of first retention wings 311, 313 have raised ribs 327e, 327f, 327g, 327h such that the contact points between the outer surfaces of the pair of first retention wings 311, 313 and the lower edge 419 of the hole 412 in the second plate 402 are located on the upper bevels 328e, 328g of the raised ribs 327e, 327g.Compared with the fastening clip without the raised ribs, since the peaks 331e, 331g of the raised ribs 327e, 327g extend outwardly beyond the lower edge 419 of the hole 412 of the second plate 402, the fastening clip with the raised ribs requires a larger external force to push the peaks 331e, 331f into the hole 412, so that the first and second plates 401, 402 are relatively less likely to come loose. That is, the fastening clip 100 fastens the first and second plates 401, 402 more firmly.

[0036] When the fastening pin 110 is inserted into the fastening sleeve 120 until it reaches the functional position, the applied external force needs to overcome the acting force caused by the deformation of the two pairs of retaining wings 311, 312, 313, 314, and the raised ribs 327e, 327f on the pair of first retaining wings 311, 313 slightly increase the deformation of the pair of first retaining wings 311, 313, so that the raised ribs 327e, 327f slightly increase the insertion force of the fastening clip 100. That is, while the fastening force of the fastening clip 100 for the two plates of the first thickness is significantly increased, the insertion force of the fastening clip 100 is only slightly increased.

[0037] In one embodiment of the present application, the raised ribs for the at least two plates of the first thickness are provided on the pair of first retaining wings 311, 313, while the outer surfaces of the pair of second retaining wings 312, 314 also abut against the lower edge 419 of the hole 412 and contribute to the fastening force of the fastening clip 100. In another embodiment, the raised ribs for the at least two plates of the first thickness can also be provided on the pair of second retaining wings 312, 314.

[0038] 5A and 5B, the lower edge 419 of the hole 412 of the second plate 402 in the plate to be fastened abuts against the bevels 328e, 328g of the upper raised ribs 327e, 327g, and the plate to be fastened that is slightly thicker than the total thickness of the first and second plates 401, 402 can also abut against the bevels 328f, 328h of the lower raised ribs 327f, 327h to achieve the same technical effect. In another embodiment of the present application, the total thickness of the two plates to be fastened is greater than the distance from the lower raised rib to the lower surface 303 of the base portion 301, so that the plate cannot just abut against the bevels of the raised ribs, but the tops 331e, 332g of the raised ribs 327e, 327g or the tops 331f, 331h of the raised ribs 327f, 327h abut against the inner surface of the hole 412. Compared with a fastening clip without raised ribs, the pair of first retaining wings 311, 313 can deform more and can also provide a larger fastening force, so that the two fastened plates are less likely to loosen and fall off. When at least two plates of a first thickness are fastened, the two pairs of retaining wings of the fastening clip 100 cooperate to provide a fastening force, but the pair of first retaining wings 311, 313 provides a larger fastening force than the pair of second retaining wings 312, 314.

[0039] FIG. 6 shows two plates with a second thickness (total thickness). As shown in FIG. 6, the total thickness of the first and second plates 601, 602 is the second thickness. The first and second plates 601, 602 with the second thickness cooperate with the raised ribs 337e, 337f, 337g, 337h on the pair of second retaining wings 312, 314 to strengthen the fastening of the fastening clip 100 on the first and second plates 601, 602. The first and second plates 601, 602 have holes 611, 612, respectively. When the plates 601, 602 need to be fastened, first align the hole 611 with the hole 612, then insert the fastening clip 100 in the ready position in FIG. 1A into the hole 611, 612, and press down the fastening pin 110 to fasten the plates 601, 602. The diameter of the holes 611, 612 is set to be equal to or slightly larger than the outer diameter of the fastening sleeve 120 in the ready position shown in Fig. 1A, so that the fastening clip 100 can be easily inserted into the holes 411, 412. The hole 612 in the lower second plate 602 matches the size of the fastening clip 100, so that when the fastening clip 100 is in the functional position, the fastening sleeve 120 can abut against the lower edge 619 of the hole 612 to fasten the first and second plates 601, 602.

[0040] Fig. 7A shows a cross-sectional view of the fastening clip 100 in the ready position, fitted into the holes of two plates of the second thickness. As shown in Fig. 7A, the fastening clip 100 is inserted into the hole 611 of the first plate 601 and the hole 612 of the second plate 602, and the upper surface of the first plate 601 contacts the lower surface 303 of the base part 301. At this time, the fastening clip 100 is in the ready position, so that the fastening clip 100 can be easily slid into the hole 612 of the plate. Also at this time, the first and second plates 601, 602 are not fastened together.

[0041] 7B shows a cross-sectional view of the fastening clip 100 in the functional position, fitted between two plates of the second thickness. As shown in FIG. 7B, the lower surface 216 of the head 211 of the fastening pin 110 is close to the upper surface 302 of the base part 301 of the fastening sleeve 120. At this time, the clamping parts 322a, 322b, 322c, 322d expand outward, so that the outer surface of each retaining wing contacts and abuts against the lower edge 619 of the hole 612 of the second plate 602. Thus, the first and second plates 601, 602 are fastened together. Since the total thickness of the two plates of the second thickness is large, the lower edge 619 of the hole 612 of the second plate 602 contacts the retaining wing lower parts 342c, 342d of the pair of second retaining wings 312, 314.

[0042] The total thickness of at least two plates fastened in Fig. 7A and 7B is the second thickness. Fig. 7B shows the relationship between the fastening clip 100 and the first and second plates 601, 602 in the functional position. As shown in Fig. 7B, when the fastening clip 100 is inserted into the holes 601, 602 and reaches the functional position, the overlapping portion 701 of the second plate 602 shown in Fig. 7A and each of the two pairs of retaining wings 311, 312, 313, 314 deform into the hole 612, so that each of the two pairs of retaining wings 311, 312, 313, 314 applies a certain force to the second plate 602 and presses the second plate 602 and the first plate 601.

[0043] While the fastening clip 100 is changing from the ready position shown in FIG. 7A to the functional position shown in FIG. 7B, the operator presses down on the fastening pin 110, causing the retaining portion 241 to contact the inwardly inclined bevels of the clamping portions 322a, 322b, 322c, 322d and forcing the clamping portions 322a, 322b, 322c, 322d outward, causing the outer surfaces of each of the two pairs of retaining wings 311, 312, 313, 314 to be pushed outward and deformed by the holes 611 and 612. When the fastening pin 110 reaches its functional position, the outer surface of the upper part of each of the two pairs of retaining wings 311, 312, 313, 314 abuts against the lower edge 619 of the hole 612 in the second plate 602, thereby pressing the first and second plates 601, 602 together to fasten the first and second plates 601, 602 together.

[0044] As shown in FIG. 7B, when two plates 601, 602 of the second thickness are fastened, the overlapping portion 701 is relatively large, so that the overlapping portion 701 is close to the thicker retaining wing lower portion 342a, 342b, 342c, 342d, and thus a large external force is required to deform the two pairs of retaining wings 311, 312, 313, 314 so that the overlapping portion 701 enters the hole 612. That is, a large pushing force is required in the conventional fastening clip. In one embodiment of the present application, the thickness of the retaining wing lower portion 342a, 342b of the pair of first retaining wings 311, 313 is smaller than the thickness of the retaining wing lower portion 342c, 342d of the pair of second retaining wings 312, 314, and thus the external force required to deform the pair of second retaining wings 312, 314 and enter the hole 612 is reduced, that is, the pushing force of the fastening clip 100 is reduced. At the same time, the outer surfaces of the pair of second retention wings 312, 314 have raised ribs 337e, 337f, 337g, 337h. Similar to the raised ribs 327e, 327f, 327g, 327h of the pair of first retention wings 311, 313, the raised ribs 337e, 337f, 337g, 337h can increase the fastening force of the fastening clip 100 against the first and second plates 601, 602 of the second thickness, so that the first and second plates 601, 602 are less likely to come loose. The principle by which the raised ribs 337e, 337f, 337g, and 337h of the pair of second retention wings increase the fastening force is the same as the principle by which the raised ribs 327e, 327f, 327g, and 327h of the pair of first retention wings 311, 313 increase the fastening force, and therefore will not be described in detail again here.

[0045] When the fastening clip 100 is used to fasten at least two plates of a second thickness, the clamping portions 322a, 322b of the pair of first retaining wings 311, 313 are thinned, so that when the fastening clip 100 is inserted into the plates of the second thickness to be fastened, the pair of first retaining wings 311, 313 are more easily deformed, and the pressing force required for the fastening clip 100 to reach the functional position is reduced. In order to prevent the two plates from loosening while the pressing force is reduced, the outer surfaces of the pair of second retaining wings 312, 314 are also provided with raised ribs 337e, 337f, 337g, 337h. The positions of the raised ribs 337e, 337f, 337g, 337h correspond to the thicknesses of the plates of the second thickness to be fastened, and the raised ribs 337e, 337f, 337g, 337h increase the fastening force of the fastening clip 100 to at least two plates of the second thickness. That is, by thinning the clamping portions 322a, 322b of the pair of first retaining wings 311, 313 and providing raised ribs 337e, 337f, 337g, 337h on the outer surfaces of the pair of second retaining wings 312, 314, when the fastening clip 100 fastens at least two plates of a second thickness, the pressing force is reduced and the fastening force remains unchanged or is slightly reduced so as to meet the fastening force requirements.

[0046] 7A and 7B, the lower edge 619 of the hole 612 of the second plate 602 in the plate to be fastened abuts the bevel 328e, 328g of the upper raised rib 327e, 327g. In another embodiment of the present application, a plate to be fastened that is slightly thicker than the total thickness of the first and second plates 601, 602 can also abut the bevel 329f, 329h of the lower raised rib 337f, 337h to achieve a similar technical effect. In another embodiment of the present application, the total thickness of the two plates to be fastened is greater than the distance from the lower raised rib to the lower surface of the base portion 301, so that the plates cannot just abut the bevel of the raised rib, but the crests 333e, 333g of the raised ribs 337e, 337g or the crests 333f, 333h of the raised ribs 337f, 337h abut the inner surface of the hole 612. Compared with a fastening clip without a raised rib, the deformation of the pair of second retaining wings 312, 314 is greater, so that the two plates to be fastened are less likely to loosen and fall off. When at least two plates of a second thickness are fastened, the two pairs of retaining wings of the fastening clip 100 cooperate to provide a fastening force, but the contribution of the pair of second retaining wings 312, 314 to the fastening force of the fastening clip 100 is greater than the contribution of the pair of first retaining wings 311, 313 to the fastening force of the fastening clip 100.

[0047] FIG. 8 is a perspective view of a fastening clip according to another embodiment of the present application. The embodiment shown in FIG. 8 is similar to the embodiment shown in FIG. 1A, except that the number and size of raised ribs on the two pairs of retaining wings 811, 812, 813, 814 of the fastening clip 800 in FIG. 8 are different from those of the fastening clip 100 shown in FIG. 1A. As shown in FIG. 8, similar to the embodiment shown in FIG. 1A, the structure of the pair of first retaining wings 811, 813 of the fastening clip 800 is symmetrical with respect to the central axis of the fastening clip, and the structure of the pair of second retaining wings 812, 814 is symmetrical with respect to the central axis of the fastening clip. The structure of the pair of first retaining wings will be described below by taking the retaining wing 811 as an example, and the structure of the pair of second retaining wings will be described by taking the retaining wing 812 as an example.

[0048] The outer surface of the retaining wing 811 has five circumferentially extending raised ribs 827a-827e, which are arranged side by side at the end of the retaining wing 811 near the base 301. Since the structure of each of the five raised ribs is the same, the structure of the raised ribs on the outer surface of the retaining wing 811 will be described below by taking the first rib 827a, which is closest to the base 301, as an example. Similar to the fastening clip 100, the raised rib 827a has an upper bottom 832a and a crest 831a in succession from top to bottom, and the raised rib 827a transitions gradually from the upper bottom 832a to the crest 831a to form an upper bevel 828a, which is used to abut against at least two plates. The retaining wing 811 is used to cooperate with at least two plates having a relatively thin thickness. The distance between the crest of each raised rib of the retaining wing 811 and the crest of the adjacent raised rib is a predetermined value D, that is, the five raised ribs of the retaining wing 811 are evenly distributed in the axial direction of the fastening clip.

[0049] The outer surface of the retention wing 812 has six circumferentially extending raised ribs 827f-827k, which are arranged side by side and located at the end of the retention wing 811 away from the base 301. Since the structure of each of the six raised ribs 827f-827k is the same, the structure of the raised ribs on the outer surface of the retention wing 812 will be described below by taking the raised rib 827f closest to the base 301 as an example. Similar to the raised rib 827a, the raised rib 827f has an upper bottom 832f and a crest 831f in succession from top to bottom, and the raised rib 827f transitions gradually from the upper bottom 832f to the crest 831f to form an upper bevel 828f, which is used to abut against at least two plates. The retention wing 812 is used to cooperate with at least two plates having a relatively large thickness. The distance between the top of each raised rib of the retaining wing 812 and the top of the adjacent raised rib is equal to a predetermined value D, i.e., the six raised ribs of the retaining wing 812 are evenly distributed in the axial direction of the fastening clip. In addition, the distance between the top of the highest raised rib 827f among the six raised ribs on the outer surface of the retaining wing 812 and the top of the lowest raised rib 827e among the five raised ribs on the outer surface of the retaining wing 811 is equal to a predetermined value D, so that in the axial direction of the fastening clip 800, the raised ribs of each of the retaining wings 811 and 812 are evenly distributed. Similarly, in the axial direction of the fastening clip 800, the raised ribs of each of the retaining wings 813 and 814 are evenly distributed. Compared with the fastening clip 100, the fastening clip 800 can be adapted to at least two plates of more types of thickness.

[0050] In another embodiment, the height of the highest raised rib among the plurality of raised ribs on the outer surface of the retention wing 812 is higher than the height of the lowest raised rib among the plurality of raised ribs on the outer surface of the retention wing 811, i.e., the radial protrusion of the plurality of raised ribs on the outer surface of the retention wing 812 overlaps with the radial protrusion of the plurality of raised ribs on the outer surface of the retention wing 811. The above embodiment can also achieve the technical effect of the fastening clip 800.

[0051] In the axial direction of the fastening clip 800, the distance A between the top of the highest raised rib 827a among the multiple raised ribs on the outer surface of the pair of first retention wings 811, 813 and the bottom of the lowest raised rib 827k among the multiple raised ribs on the outer surface of the pair of first retention wings 812, 814 occupies a length that exceeds 65% of the length of the two pairs of retention wings 811, 812, 813, 814.

[0052] When at least two plates are fastened, the fastened plates abut against the upper bevel of the raised rib, and the raised ribs of the fastening clip 800 are numerous and closely arranged, so that they can accommodate plates of various thicknesses to be fastened. In other embodiments, the number and size of the raised ribs can be designed according to actual needs.

[0053] The fastening clip of the present application can be adapted to plates of different thicknesses, for example plates with a total thickness of 2mm to 7mm, so that when the fastening clip fastens at least two thin plates of a first thickness, the fastening force of the fastening clip on the at least two plates is increased to prevent the two plates from loosening. When at least two thick plates of a second thickness are fastened, a fastening force that meets the requirements is ensured with a small insertion force. Of course, the size of the fastening clip of the present application can be proportionally increased or decreased to fit at least two thicker or thinner plates.

[0054] While only certain features of the invention have been illustrated and described herein, various improvements and modifications can be made by those skilled in the art, and it is therefore to be understood that the appended claims are intended to cover all such improvements and modifications which fall within the true spirit and scope of the invention. Some aspects of the invention are described below. [Aspect 1] In the fastening clip, a fastening pin (110) having a head (211) and a pin portion (212) extending downwardly from the head (211) and having a distal end forming a retaining portion (241); a fastening sleeve (120) having a base portion (301) and two pairs of retaining wings (311, 312, 313, 314); a fastening sleeve, each pair of the two pairs of retaining wings (311, 312, 313, 314) being disposed opposite each other, the base portion (301) being provided with a hole (305) into which the pin portion (212) can be removably inserted, the two pairs of retaining wings (311, 312, 313, 314) respectively extending downwardly from a lower surface of the base portion (301) and distributed circumferentially around a center of the hole (305), and an inner surface of a lower portion of each of the two pairs of retaining wings (311, 312, 313, 314) being inclined inwards to form a clamping portion cooperating with the retaining portion (241) of the fastening pin (110); A fastening clip, wherein an outer surface of at least one of the two pairs of retention wings (311, 312, 313, 314) has at least one circumferentially extending raised rib. [Aspect 2] The fastening clip of aspect 1, wherein the two pairs of retention wings (311, 312, 313, 314) include a pair of first retention wings (311, 313) and a pair of second retention wings (312, 314), the pair of first retention wings (311, 313) being provided with a raised rib adjacent to an upper end of the pair of first retention wings (311, 313), and the pair of second retention wings (312, 314) being provided with a raised rib adjacent to a lower end of the pair of second retention wings (312, 314). [Aspect 3] The fastening clip of claim 2, wherein the raised rib at the upper end of the pair of first retaining wings (311, 313) is positioned to contact at least two plates of a first thickness so as to fasten the at least two plates of a first thickness together by the fastening clip, and the raised rib at the lower end of the pair of second retaining wings (312, 314) is positioned to contact at least two plates of a second thickness so as to fasten the at least two plates of a second thickness together by the fastening clip. [Aspect 4] A fastening clip as described in aspect 2, wherein the clamping portions of the second pair of retaining wings of the two pairs of retaining wings (311, 312, 313, 314) are configured such that the thickness of the clamping portion of the second pair of retaining wings is smaller than the thickness of the clamping portion of the first pair of retaining wings (311, 313) in the same radial portion. [Aspect 5] A fastening clip as described in aspect 3, wherein, in the same radial portion, the distance between the outer surfaces of the clamping portions of a pair of the first retaining wings (311, 313) of the two pairs of retaining wings (311, 312, 313, 314) is smaller than the distance between the outer surfaces of the clamping portions of a pair of the second retaining wings (312, 314), and the distance between the inner surfaces of the clamping portions of a pair of the first retaining wings (311, 313) of the two pairs of retaining wings (311, 312, 313, 314) is larger than the distance between the inner surfaces of the clamping portions of a pair of the second retaining wings (312, 314). [Aspect 6] A fastening clip as described in aspect 2, wherein a claw that abuts against the retaining portion (241) is provided on the inner surface of the clamp portion, and the raised rib at the lower end of the pair of second retaining wings (312, 314) is located above the claw. [Aspect 7] 3. The fastening clip according to claim 2, wherein the raised rib at the upper end of the pair of first retention wings (311, 313) has a distance D from the lower surface of the base portion (301). [Aspect 8] 2. The fastening clip of claim 1, wherein the raised rib has a downwardly and outwardly sloping upper bevel. [Aspect 9] 2. The fastening clip according to claim 1, wherein the pair of first retention wings (311, 313) and the pair of second retention wings (312, 314) are each provided with two raised ribs arranged side by side. [Aspect 10] A fastening clip as described in embodiment 1, wherein a guide rib is arranged on the outer surface of the pin portion (212) and a guide groove is provided in the hole (305), and when the pin portion (212) is inserted into the hole (305), the guide rib is positioned within the guide groove, and the fastening pin (110) cannot rotate relative to the fastening sleeve (120). [Aspect 11] 3. The fastening clip according to claim 2, wherein the pair of first retention wings (311, 313) and the pair of second retention wings (312, 314) are respectively provided with a plurality of raised ribs arranged side by side. [Aspect 12] A fastening clip as described in aspect 11, wherein the plurality of raised ribs of the pair of first retention wings (311, 313) and the plurality of raised ribs of the pair of second retention wings (312, 314) are evenly distributed in the axial direction of the fastening clip. [Explanation of symbols]

[0055] 100 Fastening Clip 110 Fastening pin 111 Head 120 Fastening sleeve 211 Head 212 Pin section 215 Top surface 216 Bottom surface 230 Upper part 240 Lower part 241 Holding part 242 Fastening pin guide part 245 Groove 247 Groove bottom 248 Upper side wall 249 Lower side wall 251 Guide Rib 252 Guide Rib 253 Guide Rib 254 Guide Rib 257 Transition 258 Central pillar 262 Top 263 Lower 265 Ridge 266 Cavity 268 Contact surface 269 ​​Elastic Arm 301 Base 302 Top surface 303 Bottom surface 305 holes 307 Central part 311 First Retention Wing 312 Second Retention Wing 313 First Retention Wing 314 Second Retention Wing 321 Ridge 322 Clamp section 322a Clamp section 322b Clamp section 322c Clamp section 322d Clamp section 323 Guide groove 327e Upper raised rib 327f Lower raised rib 327g upper raised rib 327h Lower raised rib 328e Upper Bevel 328f Upper Bevel 328g upper bevel 328h Upper Bevel 329e Upper Bevel 329f Upper Bevel 329g upper bevel 329h Upper Bevel 331e Top 331f top 331g top 331h top 332c Clamp section 332e upper bottom 332g top 333e Top 333f top 333g top 333h top 337e Raised ribs 337f Lower raised rib 337g raised ribs 337h Lower raised rib 341a Retention wing upper part 341b Retention wing upper part 341c Retention Wing Top 341d Retention wing upper part 342a Retaining wing lower 342b Lower retaining wing 342c Retention Wing Lower 342d Retention wing lower 345a Inside 345b Inside 345c Inside 345d Inside 346a Exterior 346b Exterior 346c Exterior 346d Exterior 348a Fastening sleeve guide part 348b Fastening sleeve guide part 348c Fastening sleeve guide part 348d Fastening sleeve guide part 351 Recess 352 Recess 361a Claw 361b Claws 361c nails 361d Claws 371a Exterior 371b Exterior 371c Exterior 371d Exterior 401 First Plate 402 Second Plate 411 holes 412 holes 419 Lower edge 501 parts 601 First Plate 601 Plate 602 Second Plate 611 holes 612 holes 619 Lower edge 701 parts 800 Fastening Clip 811 First Retaining Wing 812 Second Retaining Wing 813 First Retaining Wing 814 Second Retaining Wing 827a Raised ribs 827b Raised ribs 827c Raised ribs 827d Raised ribs 827e Raised ribs 827f Raised rib 827g raised ribs 827h Raised ribs 827i Raised ribs 827j Raised ribs 827k Raised ribs 828a Upper Bevel 828f Upper Bevel 831a Top 831f top 832a Upper bottom 832f Upper bottom

Claims

1. In the fastening clip, a fastening pin (110) having a head (211) and a pin portion (212) extending downwardly from the head (211) and having a distal end forming a retaining portion (241); a fastening sleeve (120) having a base portion (301) and two pairs of retaining wings (311, 312, 313, 314); a fastening sleeve, each pair of said two pairs of retaining wings (311, 312, 313, 314) being disposed opposite each other, said base portion (301) being provided with a hole (305) into which said pin portion (212) can be removably inserted, said two pairs of retaining wings (311, 312, 313, 314) respectively extending downwardly from a lower surface of said base portion (301) and distributed circumferentially around a center of said hole (305), and an inner surface of a lower portion of each of said two pairs of retaining wings (311, 312, 313, 314) being inclined inwards to form a clamping portion cooperating with said retaining portion (241) of said fastening pin (110); an outer surface of at least one of the two pairs of retention wings (311, 312, 313, 314) having at least one circumferentially extending raised rib; the two pairs of retention wings (311, 312, 313, 314) include a first pair of retention wings (311, 313) and a second pair of retention wings (312, 314), the first pair of retention wings (311, 313) being provided with a raised rib adjacent an upper end of the first pair of retention wings (311, 313) and the second pair of retention wings (312, 314) being provided with a raised rib adjacent a lower end of the second pair of retention wings (312, 314); the raised ribs at the upper ends of the pair of first retaining wings (311, 313) are arranged to contact the at least two plates of the first thickness so as to fasten the at least two plates of the first thickness together by the fastening clips, and the raised ribs at the lower ends of the pair of second retaining wings (312, 314) are arranged to contact the at least two plates of the second thickness so as to fasten the at least two plates of the second thickness together by the fastening clips, A fastening clip, in which, in the same radial portion, the distance between the outer surfaces of the clamping portions of a pair of the first retaining wings (311, 313) of the two pairs of retaining wings (311, 312, 313, 314) is smaller than the distance between the outer surfaces of the clamping portions of a pair of the second retaining wings (312, 314), and the distance between the inner surfaces of the clamping portions of a pair of the first retaining wings (311, 313) of the two pairs of retaining wings (311, 312, 313, 314) is larger than the distance between the inner surfaces of the clamping portions of a pair of the second retaining wings (312, 314).

2. The fastening clip according to claim 1, wherein the clamping portions of the first pair of retaining wings of the two pairs of retaining wings (311, 312, 313, 314) are arranged such that the thickness of the clamping portion of the first pair of retaining wings is thinner than the thickness of the clamping portion of the second pair of retaining wings (311, 313) at the same radial portion.

3. 2. The fastening clip according to claim 1, wherein a claw that abuts against the retaining portion (241) is provided on the inner surface of the clamping portion, and the raised rib at the lower end of the pair of second retaining wings (312, 314) is located above the claw.

4. 2. The fastening clip of claim 1, wherein the raised rib at the upper end of the pair of first retention wings (311, 313) has a distance D from the lower surface of the base portion (301), the distance D being no greater than the first thickness.

5. 2. The fastening clip of claim 1, wherein said raised rib has a downwardly and outwardly sloping upper bevel.

6. 3. The fastening clip according to claim 2, wherein said pair of first retention wings (311, 313) and said pair of second retention wings (312, 314) are each provided with two raised ribs arranged side by side.

7. 2. The fastening clip of claim 1, wherein a guide rib is disposed on an outer surface of the pin portion (212) and a guide groove is provided in the hole (305), and when the pin portion (212) is inserted into the hole (305), the guide rib is disposed in the guide groove and the fastening pin (110) cannot rotate relative to the fastening sleeve (120).

8. 2. The fastening clip of claim 1, wherein said pair of first retention wings (311, 313) and said pair of second retention wings (312, 314) are respectively provided with a plurality of raised ribs arranged side by side.

9. The fastening clip according to claim 8, wherein the plurality of raised ribs of the first pair of retention wings (311, 313) and the plurality of raised ribs of the second pair of retention wings (312, 314) are evenly distributed in the axial direction of the fastening clip.

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