Bumper for a vehicle

Abstract

A bumper for a vehicle can include an injection-molded bumper cover and a reinforcement structure disposed in a linear shape with a fiber-reinforced composite material and coupled to a rear surface of the bumper cover by direct assembly to reinforce a rear side of the bumper cover.

Description

TECHNICAL FIELD

[0001] The present application relates to a bumper for a vehicle having a reinforced reinforcement structure. BACKGROUND

[0002] A bumper is installed at the front and rear of a vehicle to absorb impact from a collision to protect a vehicle body.

[0003] The bumper generally includes a bumper cover and a rear beam coupled to the rear of the main body of the bumper cover as a reinforcement structure. The rear beam can be coupled to the rear of the main body of the cover through a connecting member.

[0004] Most rear beams are made of a metallic substance, but recently, a rear beam made of a composite material is being developed to improve fuel efficiency by reducing the weight of an automobile.

[0005] The information included in the Background section of this detailed description is only for the purpose of enhancing the understanding of the general background of the application and can not be considered as acknowledging that this information forms the prior art that is already known to those skilled in the art. SUMMARY

[0006] Aspects of the present application aim to provide a bumper for a vehicle that eliminates the need for a rear beam while ensuring protection against a collision.

[0007] Aspects of the present application aim to provide a bumper for a vehicle configured to obtain the effects of reducing the weight of a vehicle body, reducing material costs, simplifying a manufacturing process, and preventing a reduction in external aesthetics.

[0008] According to various exemplary embodiments of the present application, a bumper for a vehicle includes an injection-molded bumper cover, and a reinforcement structure provided in a linear shape with a fiber-reinforced composite material and coupled to the rear surface of the bumper cover by direct assembly to reinforce the rear side of the bumper cover.

[0009] The bumper cover can include a cover main body whose front surface is exposed to the outside, a clamping portion provided with a coupling groove into which the reinforcement structure is assembled and located behind the cover main body, and a connecting member connected at a certain distance between the cover main body and the clamping portion.

[0010] The cover main body can include an upper cover main body forming the upper portion of the bumper and a lower cover main body forming the lower portion of the bumper, and the connecting member can include an assembly portion for assembly between the upper cover main body and the lower cover main body.

[0011] The assembly portion can include a first assembly portion extending rearward from one of the upper cover body and the lower cover body, and a second assembly portion extending rearward from the other of the upper cover body and the lower cover body, and the clamping portion can be coupled to the cover body at a distance by one of the first assembly portion and the second assembly portion.

[0012] The bumper cover can include an upper body forming an upper portion of the bumper, and a lower body forming a lower portion of the bumper and assembled with the upper body, and the reinforcing structure can be disposed on at least one of the upper body or the lower body.

[0013] The reinforcing structure can be provided in a linear shape, maintained unless an external force is applied, but can be bent, and the clamping portion can be provided in a plurality and arranged apart from each other in a length direction of the reinforcing structure.

[0014] The reinforcing structure can be restricted from movement in the length direction while being coupled to the clamping portion.

[0015] The clamping portion can be provided with a coupling groove into which the reinforcing structure is fitted, the reinforcing structure can have a section to be fitted to the clamping portion, a diameter of the section can correspond to a size of the coupling groove, and a diameter of a section of the reinforcing structure located on one side of the clamping portion can be greater than the size of the coupling groove.

[0016] The clamping portion can be provided in a plurality and arranged apart from each other in a length direction of the reinforcing structure, the reinforcing structure can include a plurality of first diameter portions having a diameter to be fitted to the clamping portion, a plurality of second diameter portions having a diameter greater than the diameter of the first diameter portion to be positioned between the clamping portions, and the plurality of first diameter portions and the plurality of second diameter portions can be alternately repeated in the length direction of the reinforcing structure.

[0017] The clamping portion can be provided in a plurality and arranged apart from each other in a length direction of the reinforcing structure, and the reinforcing structure can be bent at both ends in the length direction of the reinforcing structure to be caught by the clamping portions located at the outermost sides.

[0018] The cover body can have at least some sections curved in a width direction of the vehicle, the clamping portion can be provided in a plurality and arranged apart from each other in a length direction of the reinforcing structure, and the reinforcing structure can be provided in a linear shape, the reinforcing structure being bendable and maintained in a straight shape unless an external force is applied, so that at least some sections are bent to correspond to a curvature of the cover body when fitted to the plurality of clamping portions.

[0019] The methods and apparatuses of the present application have other features and advantages which will be apparent from or that will be more readily understood by those skilled in the art upon a reading of the following detailed description in conjunction with the accompanying drawings, which are provided by way of illustration and example only, and not by way of limitation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a sectional view of a main portion of a bumper for a vehicle according to various exemplary embodiments of the present application;

[0021] Figure 2 is a rear view of a bumper for a vehicle according to various exemplary embodiments of the present application;

[0022] Figure 3 is Figure 2 is an enlarged view of A portion of

[0023] Figure 4 is Figure 3 is a side sectional view of a main portion structure of

[0024] Figure 5 is Figure 3 is a perspective view of a separated lower body of a bumper cover of

[0025] Figure 6 is Figure 5 is a plan view of a main portion of

[0026] It is to be understood that the drawings are not necessarily to scale, as the emphasis instead is placed upon illustrating the various features of the application in a somewhat simplified form. Specific design features of the present application, including, for example, specific dimensions, orientations, locations, and shapes, will be determined, in part, based on the specific intended application and use environment.

[0027] In the drawings, like numerals refer to like parts through several views of the drawings, and the drawings illustrate various features of the application. DETAILED DESCRIPTION

[0028] Reference will now be made in detail to various embodiments of the application, examples of which are illustrated in the accompanying drawings. While the application will be described in conjunction with the exemplary embodiments, it will be understood that the description is not intended to limit the application to those exemplary embodiments. On the contrary, the application is intended to cover alternatives, modifications, equivalents, and other embodiments that can be included within the spirit and scope of the application as defined by the appended claims.

[0029] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The embodiments introduced below are provided as examples to convey the full spirit of the present application to a person of ordinary skill in the art to which the embodiments of the present application belong. The present application is not limited to these embodiments, but can be embodied in any other form. For the sake of clarity, parts irrelevant to the description are omitted from the drawings, and the width, length, thickness, etc. of elements are exaggerated for convenience in the drawings. Throughout the specification, like reference numerals refer to like elements.

[0030] A bumper 10 for a vehicle is installed at a front or rear portion of a vehicle to protect a vehicle body, and can have a front bumper provided at the front portion and a rear bumper provided at the rear portion.

[0031] The bumper 10 for a vehicle according to various exemplary embodiments of the present application can be used as a front bumper as well as a rear bumper, but for convenience of explanation, it will be assumed herein that the bumper 10 for a vehicle is used as a rear bumper, which is more likely to experience a low-speed collision.

[0032] As shown in Figure 1 The bumper 10 for a vehicle includes a bumper cover 20 forming an exterior. The bumper cover 20 forms the outermost side of the bumper 10 for a vehicle, such that the surface is exposed to the outside when the bumper cover 20 is installed into a vehicle.

[0033] The bumper cover 20 can be manufactured by injection molding synthetic resin, and the shape of the bumper cover 20 can be modified into various forms by considering the design or characteristics of a vehicle in which the bumper 10 for a vehicle is employed.

[0034] The bumper 10 for a vehicle is provided with a reinforcement structure 30 coupled to a rear surface of the bumper cover 20 to reinforce the bumper cover 20.

[0035] The reinforcement structure 30 can function to deform while absorbing impact energy during a vehicle collision, and to uniformly distribute the impact from the collision to a vehicle body.

[0036] The reinforcement structure 30 can be formed of a fiber-reinforced composite material, arranged in a linear shape in a length direction of the bumper cover 20, and directly coupled to the rear surface of the bumper cover 20 by being fitted to the injection-molded bumper cover 20.

[0037] The fiber-reinforced composite material is a combination of at least two or more raw materials, which refers to a substance having a structure in which a reinforcing raw material such as glass fiber or carbon fiber is impregnated in a base raw material such as resin.

[0038] Compared to a rear beam of an existing bumper formed of a metallic substance, the reinforcement structure 30 formed of such a fiber-reinforced composite material can have a relatively light weight while satisfying the same level of rigidity conditions.

[0039] Among the fiber-reinforced composite materials, a continuous fiber thermoplastic (CFT) composite material manufactured by continuously impregnating a base raw material with a reinforcing fiber can be particularly suitable as a material for the reinforcement structure 30.

[0040] The CFT composite material has advantages such as high rigidity, stable mechanical properties, etc. compared to other general fiber-reinforced composite materials, and thus facilitates the manufacture of the reinforcement structure 30.

[0041] Therefore, since the reinforcing structure 30 is directly fastened in a fitting manner on the rear surface of the injection-molded bumper cover 20 and is integrated with the bumper cover 20, the bumper 10 for a vehicle can ensure protection against a collision and eliminate the need for a rear beam.

[0042] In addition, the reinforcing structure 30 formed of a fiber-reinforced composite material has a relatively small weight while satisfying the same rigidity of a vehicle body compared to a metal rear beam, thereby having an effect of contributing to fuel saving due to a reduction in the weight of the vehicle body.

[0043] In addition, the bumper 10 for a vehicle, in which the rear beam is omitted, can not only eliminate the need for a rear beam, but also eliminate the need for a structure for coupling the rear beam to the bumper cover 20, thereby having an advantage in manufacturing efficiency, such as a reduction in material costs and a simplification of a manufacturing process.

[0044] The reinforcing structure 30 including a fiber raw material has an elongated linear shape, which can obtain elasticity that is advantageous for impact absorption. The linear shape of the reinforcing structure 30 can have a circular cross-section.

[0045] The bumper cover 20 can include a cover main body 21 of which a front surface is exposed to the outside and a clip portion 22 to which the reinforcing structure 30 is fitted.

[0046] The cover main body 21 can have a plate shape extending along the width of the vehicle. The cover main body 21 can have two end portions in a length direction of the bumper cover 20, which are bent to cover both side surfaces of the vehicle body at the rear side, and a portion between the two end portions of the cover main body 21 can be formed to be raised rearward to have a gentle curvature. The reinforcing structure 30 can be coupled to the cover main body 21 to be positioned between the two end portions of the cover main body 21 having the gentle curvature.

[0047] The clip portion 22 can be disposed at a rear portion of the rear surface of the cover main body 21, and provided with a coupling groove 22a for fitting the reinforcing structure 30. The coupling groove 22a can be formed to be open to a bottom of the clip portion 22.

[0048] The coupling groove 22a can be formed to wrap more than half of the circumference of the reinforcing structure 30, and when the reinforcing structure 30 is pressed from the bottom of the clip portion 22 toward the coupling groove 22a, the reinforcing structure 30 can be fitted and fixed to the coupling groove 22a to be elastically supported by the coupling groove 22a.

[0049] The clamping portion 22 can be continuously arranged along the length direction of the reinforcing structure 30 or provided as a plurality of portions arranged apart from each other along the length direction of the reinforcing structure 30, so that all sections in the length of the reinforcing structure 30 can be coupled to the rear surface of the bumper cover 20 while being stably supported on the rear surface of the bumper cover 20.

[0050] The reinforcing structure 30 fitted in the coupling groove 22a can be adhesively or heat-fused to the clamping portion 22 as needed.

[0051] Meanwhile, the portion of the bumper cover 20 on the side on which the clamping portion 22 to which the reinforcing structure 30 is fitted can be thicker than the adjacent portion in the forward and rearward directions, and thus, due to a local difference in cooling speed during a cooling process of the injection-molded bumper cover 20, a sink mark can be formed on the front surface of the bumper cover 20 at a position corresponding to the clamping portion 22, and the sink mark can be exposed to the outside.

[0052] To solve the current problem, the bumper cover 20 can include a connector 23 for connecting between the cover body 21 and the clamping portion 22, and the connector 23 can connect between the cover body 21 and the clamping portion 22 with a certain distance therebetween.

[0053] With the structure of the bumper cover 20, the clamping portion 22 can be withdrawn behind the cover body 21 and shielded by the cover body 21 to prevent exposure to the outside.

[0054] Thus, in the bumper cover 20, the clamping portion 22 is thickened to be fastened with the reinforcing structure 30, so that even when a sink mark is formed on the surface of the clamping portion 22 during a cooling process after injection, the chance of the sink mark being exposed to the outside is eliminated.

[0055] Thus, the reinforcing structure 30 prevents a decrease in the aesthetic appearance of the bumper 10 for a vehicle, so that the bumper 10 for a vehicle can reduce a constraint on reinforcing the bumper cover 20 with a thick reinforcing structure 30.

[0056] To suppress the formation of a sink mark on the front surface of the cover body 21 due to the connector 23, the connector 23 can be provided to have at least an end portion connected to the cover body 21, which is thinner than the thickness t2 of the cover body 21.

[0057] In consideration of the current situation, the connector 23 can include a first connector 23a connected to the cover body 21 and a second connector 23b connected to the clamping portion 22. The first connector 23a can be formed thinner than the cover body 21, and the second connector 23b can be formed thicker than the first connector 23a in consideration of the strength of connection with the clamping portion 22.

[0058] AsFigures 2 to 6 As shown, in another exemplary embodiment of the present application, the bumper 10 for a vehicle can include an upper body 40 forming an upper portion and a lower body 50 assembled with the upper body 40 to form a lower portion through a bumper cover 20.

[0059] The upper body 40 and the lower body 50 can be installed together in a single injection-molded state, and the reinforcement structure 30 can be integrated with the bumper cover 20 by being fitted into the clamping portion 22 disposed at one of the upper body 40 and the lower body 50.

[0060] The bumper 10 for a vehicle having a separately manufactured upper portion and a lower portion can have the reinforcement structure 30 disposed at one of the upper body 40 and the lower body 50 that needs reinforcement, taking into account the characteristics of the type of vehicle.

[0061] In the current case, the other of the upper body 40 and the lower body 50 in which the reinforcement structure is not disposed does not need to change its injection-molded form in relation to the reinforcement structure 30. Thus, when viewed as a whole, the bumper 10 for a vehicle can have the advantage of adopting the reinforcement structure 30 by deforming a portion of the mold.

[0062] Alternatively, when both the upper portion and the lower portion of the bumper cover 20 need reinforcement, the upper body 40 and the lower body 50 each have the clamping portion 22, and a pair of reinforcement structures 30 can be disposed to be fitted and coupled to the clamping portions 22 of the upper body 40 and the lower body 50.

[0063] The bumper cover 20 can include a cover main body 21 of which a front surface is exposed to the outside, a clamping portion 22 to which the reinforcement structure 30 is fitted and coupled, and a connector 23 connecting between the cover main body 21 and the clamping portion 22 while maintaining a distance between the cover main body 21 and the clamping portion 22 to prevent a sink mark from being formed on the front surface of the cover main body 21 due to the clamping portion 22.

[0064] The cover main body 21 can include an upper cover main body 41 forming an upper portion and a lower cover main body 51 forming a lower portion. The upper cover main body 41 can be disposed through a front portion of the upper body 40, and the lower cover main body 51 can be disposed through a front portion of the lower body 50.

[0065] The connector 23 can include an assembly portion 23a for assembly between the upper cover main body 41 and the lower cover main body 51.

[0066] In addition to the assembly portion 23a, the upper body 40 and the lower body 50 can also be integrated with each other in a fastening method using a fastening member, or in other various coupling structures including an adhesive method.

[0067] The assembly portion 23a can include a first assembly portion 42 extending rearward from a bottom of the upper cover body 41, and a second assembly portion 52 extending rearward from a top of the lower cover body 51 to be coupled with the first assembly portion 42, so that the assembly portion 23a can be disposed in a boundary portion between the upper cover body 41 and the lower cover body 51.

[0068] The second assembly portion 52 can include an assembly hole 52a through which the first assembly portion 42 is fitted to the second assembly portion 52, and a protrusion 42a that is caught by the assembly hole 52a can be provided in the first assembly portion 42. Thus, when the first assembly portion 42 is fitted to the assembly hole 52a of the second assembly portion 52 and is supported by the protrusion 42a caught by the assembly hole 52a, the first assembly portion 42 and the second assembly portion 52 can be assembled together.

[0069] The clamping portion 22 can be connected to the cover body 21 through a bottom of the second assembly portion 52 with a certain distance from the cover body 21, and thus, even when the clamping portion 22 for fastening the reinforcement structure 30 is formed to be thick, the bumper 10 for a vehicle can prevent a dent from being formed on a front surface of the cover body 21 due to the clamping portion 22.

[0070] The positions of the first assembly portion 42 and the second assembly portion 52 can be interchanged, as long as the first assembly portion 42 extends rearward from one of the upper cover body 41 and the lower cover body 51 and the second assembly portion 52 extends rearward from the other of the upper cover body 41 and the lower cover body 51.

[0071] The clamping portion 22 can be connected to the cover body 21 through the first assembly portion 42 and the second assembly portion 52 with a certain distance from the cover body 21.

[0072] In the foregoing embodiments of the present application, the clamping portion 22 and the connector 23 can be provided in the shape of a thin rib in the length direction of the bumper cover 20 and the reinforcement structure 30.

[0073] The rib-shaped clamping portion 22 having a small width can be easily elastically deformed to facilitate elastic expansion of the coupling groove 22a in the process of fitting the reinforcement structure 30 to the clamping portion 22.

[0074] The reinforcement structure 30 can be provided in a linear shape having elasticity, which is bendable but maintains a linear shape unless an external force is applied.

[0075] In addition, the clamping portion 22 can be provided in a plurality and arranged apart from each other in the length direction of the reinforcement structure 30.

[0076] Accordingly, when the reinforcing structure 30 provided in a straight shape is assembled to the plurality of clamping portions 22, at least some portions of the reinforcing structure 30 can be bent in a curvature corresponding to the curvature of the cover main body 21 to correspond to the shape of the cover main body 21, thereby being coupled with the cover main body 21.

[0077] Further, the bumper 10 for a vehicle can be provided to not only guide the reinforcing structure 30 to a correct assembly position in the process of assembling the reinforcing structure 30 to the bumper cover 20, but also suppress movement of the reinforcing structure 30 assembled with the bumper cover 20 in the length direction of the reinforcing structure 30.

[0078] To this end, as shown in Figure 5 and Figure 6 , the reinforcing structure 30 can be provided to have sections with different diameters, so that the reinforcing structure 30 can be caught by the clamping portions 22 in the length direction of the reinforcing structure 30 while being coupled with the clamping portions 22.

[0079] For example, the diameter of the section of the reinforcing structure 30 to be assembled to the clamping portions 22 can correspond to the size of the coupling groove 22a, and the diameter of the section of the reinforcing structure 30 located between the clamping portions 22 can be greater than the size of the coupling groove 22a. As a reference, the clamping portions 22 are drawn in a phantom line in Figure 5 .

[0080] Referring to Figure 5 , the reinforcing structure 30 can have a form in which a first diameter portion 31 of a small diameter to be assembled to the clamping portions 22 and a second diameter portion 32 of a diameter greater than the first diameter portion 31 to be placed between the clamping portions 22 are alternately repeated in the length direction of the reinforcing structure 30.

[0081] Further, the reinforcing structure 30 can be bendable so that both end portions of the reinforcing structure 30 in the length direction are caught by the outermost clamping portions 22.

[0082] To this end, both end portions of the reinforcing structure 30 can form a bending portion 33, which can also perform the functions of guiding the reinforcing structure 30 to a correct assembly position and suppressing movement of the reinforcing structure 30 assembled with the bumper cover 20 in the length direction of the reinforcing structure 30 in the process of assembling the reinforcing structure 30 to the bumper cover 20.

[0083] When having the bending portion 33 at both ends, even when all sections in the length of the reinforcing structure 30 have a uniform diameter corresponding to the size of the coupling groove 22a, the reinforcing structure 30 can be assembled to a correct position on the bumper cover 20, and movement of the reinforcing structure 30 can also be suppressed.

[0084] According to various exemplary embodiments of the present application, a bumper for a vehicle can have a structure that eliminates the need for a rear beam while ensuring protection against a collision.

[0085] According to various exemplary embodiments of the present application, a bumper for a vehicle can obtain the effects of reducing the weight of a vehicle body, reducing material costs, simplifying a manufacturing process, and preventing a reduction in external aesthetics.

[0086] For convenience of explanation and accurate definition of the appended claims, features of the exemplary embodiments shown in the drawings are described using the terms "upper", "lower", "inner", "outer", "up", "down", "upward", "downward", "front", "rear", "back", "inboard", "outboard", "inward", "outward", "interior", "exterior", "within", "without", "forward", and "rearward" with reference to the positions of the features. It will be further understood that the term "connected" or its derivatives refer to either a direct or an indirect connection.

[0087] The foregoing description of specific exemplary embodiments of the application has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the principles of the application and its practical application to thereby enable others skilled in the art to best utilize the application and various embodiments with various modifications as are suited to the particular use contemplated. It is intended that the scope of the application be defined by the claims appended hereto, and their equivalents.

Claims

1. A bumper for a vehicle, comprising: an injection-molded bumper cover; and a reinforcing structure disposed in a linear shape in a fiber-reinforced composite material and coupled to a rear surface of the bumper cover to reinforce a rear side of the bumper cover by direct assembly, wherein the bumper cover comprises: a cover main body of which a front surface is exposed to the outside; a clamping portion provided with a coupling groove into which the reinforcing structure is assembled, the clamping portion being located behind the cover main body; and a connector connecting between the cover main body and the clamping portion while maintaining a distance therebetween, wherein the cover main body comprises: an upper cover main body forming an upper portion of the bumper; and a lower cover main body forming a lower portion of the bumper, and wherein the connector comprises an assembly portion for assembly between the upper cover main body and the lower cover main body. the assembly portion comprises:

2. The bumper of claim 1, wherein, a first assembly portion extending rearward from one of the upper cover main body and the lower cover main body; and a second assembly portion extending rearward from the other of the upper cover main body and the lower cover main body, and wherein the clamping portion is coupled to the cover main body with a certain distance therefrom through one of the first assembly portion and the second assembly portion. the second assembly portion comprises an assembly hole through which the first assembly portion is assembled to the second assembly portion.

3. The bumper of claim 2, wherein, the first assembly portion comprises a protrusion caught by the assembly hole.

4. The bumper of claim 3, wherein, the bumper cover comprises:

5. The bumper of claim 1, wherein, an upper body forming an upper portion of the bumper; and a lower body forming a lower portion of the bumper and assembled with the upper body, and wherein the reinforcing structure is disposed on at least one of the upper body or the lower body. the reinforcing structure is disposed in a linear shape, the reinforcing structure is bendable and maintains a linear form unless an external force is applied to the reinforcing structure, and the clamping portion is provided in a plurality and arranged apart from each other in a length direction of the reinforcing structure.

6. The bumper of claim 1, wherein, the reinforcing structure is restricted from movement in the length direction while being coupled to the clamping portion.

7. The bumper of claim 1, wherein, 8.The bumper of claim 7, wherein the clamping portion is provided with a coupling groove into which the reinforcing structure is assembled, the reinforcing structure has a section to be assembled to the clamping portion, a diameter of the section corresponds to a size of the coupling groove, and a diameter of a section of the reinforcing structure located on one side of the clamping portion is greater than the size of the coupling groove. 9.The bumper of claim 8, the clamping portion is provided in a plurality and arranged apart from each other in a length direction of the reinforcing structure, wherein, wherein the reinforcing structure comprises: a plurality of first diameter portions having a diameter to be assembled to the clamping portion; and a plurality of second diameter portions having a diameter greater than the diameter of the first diameter portions to be positioned between the clamping portions. the plurality of first diameter portions and the plurality of second diameter portions are alternately repeated in the length direction of the reinforcing structure.

10. The bumper of claim 9, wherein, 11.The bumper of claim 7, wherein the clamping portion is provided in a plurality and arranged apart from each other in a length direction of the reinforcing structure, and ​ The reinforcing structure is bent at a first end and a second end in a length direction of the reinforcing structure to be caught by the outermost clamping portions.

12. The bumper of claim 1, wherein, The cover body has a predetermined section bent in a width direction of the vehicle, The clamping portions are provided in a plurality and arranged apart from each other in the length direction of the reinforcing structure, and The reinforcing structure is provided in a linear shape, the reinforcing structure is bendable and maintains a straight shape unless an external force is applied thereto, such that the predetermined section is bent to correspond to a curvature of the cover body when fitted to the plurality of clamping portions.

13. The bumper of claim 1, wherein, The connecting member includes: a first connecting member connected to the cover body; and a second connecting member connected to the clamping portion, wherein a thickness of the second connecting member is greater than a thickness of the first connecting member.

14. The bumper of claim 13, wherein, The thickness of the first connecting member is less than a thickness of the cover body.

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