Description:TECHNICAL FIELD
[0001] The present disclosure relates to the field of fusion structure of plastic parts in a vehicle, and more particularly the present disclosure relates to a simple, cost-effective yet efficient and robust coupling assembly that efficiently couples two parts of a vehicle with a minimum number of welds, which is also capable of efficiently withstanding tension force and shear force in both vertical as well as horizontal directions and restricts separation of the two coupled parts in an event of a vehicular crash.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Door assembly of a vehicle is clipped to a body-in-white (BiW) or to other parts of the vehicle using clipping elements. Further, a fusion-based joining technique helps join two or more internal plastic parts associated with the door assembly. A conventional fusion technique for joining two plastic parts in a vehicle involves fusion structures such as welding bosses being provided over one of the parts and through-holes being provided on the other part. For instance, one of the plastic parts of the door assembly may be provided with welding bosses (welding cylinders) and the other plastic part of the door assembly may be provided with through-holes such that each hole may receive one of the welding bosses. Further, once the bosses are passed through the holes by stacking the two plastic parts together, the upper end of the bosses are melted using ultrasonic welding or other welding technologies, so that the melted portion of the boss gets fused and fixed on holes and the door panel, thereby joining the two plastic parts of the door assembly. Similarly, two different plastic parts in the vehicle may also be joined to each other.
[0004] However, such conventional fusion structures have various problems such as the inability of the welding bosses to withstand tension force and shear force. During the physical crash of the vehicle, there is bending in the door panel due to the bending of the BIW. This leads to shear and tension forces coming on the welding bosses, Usually, the tension force is supported by the dome of the welding boss (after ultrasonic weld condition) but there is no support for shear allowing failure of welds. As a result, upon application of shear force in vertical and/or horizontal direction due to the impact, the welding fails and the two plastic parts of the door panel gets separated from each other.
[0005] Besides, the conventional fusion structures require a large number of welding bosses and holes in order to sufficiently keep the plastic parts coupled together, thus, requiring a greater number of welds also, which makes the overall technique costly and bulky, increasing the overall weight of the structure. Still, these structures fail to efficiently withstand impact on the vehicle in vertical and/or horizontal directions.
[0006] There is, therefore, a need to overcome the above drawback, limitations, and shortcomings associated with existing fusion structures and techniques used in vehicles and provide a simple, cost-effective yet efficient and robust solution in form of a coupling assembly that efficiently couples two parts of a vehicle with a minimum number of welding bosses and welds, which is capable of efficiently withstanding impact on the vehicle in both vertical as well as horizontal directions, and restricting separation of the two coupled parts of the vehicle.

OBJECTS OF THE PRESENT DISCLOSURE
[0007] Some of the objects of the present disclosure, which at least one embodiment herein satisfies are as listed herein below.
[0008] It is an object of the present disclosure to overcome the drawbacks, limitations, and shortcomings associated with existing fusion structures (welding bosses and corresponding through holes) and fusion-based joining techniques implemented in vehicles.
[0009] It is an object of the present disclosure to efficiently couple two parts of a vehicle. For instance, coupling two plastic parts of a door assembly, but not limited to the like.
[0010] It is an object of the present disclosure to restrict welding failure and separation of the coupled plastic parts upon application of tension force and/or shear force in vertical and/or horizontal direction in an event of an impact on the vehicle.
[0011] It is an object of the present disclosure to increase the shear force withstanding capability of the welding bosses used in the existing fusion-based joining technique.
[0012] It is an object of the present disclosure to provide a coupling assembly that requires a comparatively less number of welds and fusion structures compared to existing techniques, thereby making the overall technique cost-effective and simple, and keeping the overall weight of the structure under check.
[0013] It is an object of the present invention to provide a simple, cost-effective yet efficient and robust solution in form of a coupling assembly that efficiently couples two parts of a vehicle with a minimum number of welding bosses and welds, which is capable of efficiently withstanding impact on the vehicle in both vertical as well as horizontal directions, and restricting separation of the two coupled parts of the vehicle.

SUMMARY
[0014] The present disclosure relates to a simple, cost-effective yet efficient and robust coupling assembly that efficiently couples two parts of a vehicle and is capable of efficiently withstanding tension force and shear force in both vertical as well as horizontal directions and restricts separation of the two coupled parts in an event of a vehicular crash.
[0015] An aspect of the present disclosure pertains to a coupling assembly for two parts of a vehicle. The assembly may comprise a first part and a second part, which may be but not limited to two plastic parts of a door panel or trim panel of the vehicle. The first part may comprise multiple welding bosses protruding from a surface of the first part with a plurality of spider ribs configured around each boss. The ribs may be configured around the bosses such that the ribs associated with two adjacent bosses are configured in an alternate pattern around the corresponding bosses. Further, the second part may comprise multiple holes with a peripheral rib configured around each of the holes such that upon stacking the second part and the first part, each of the bosses passes through one of the holes and one of the peripheral ribs encircles and engrosses the plurality of ribs associated with one of the bosses. Furthermore, the bosses may be melted once the second part and the first part are stacked, which may result in the coupling of the first part and the second part.
[0016] Accordingly, the alternate pattern of the plurality of ribs around the two adjacent bosses may facilitate the first part and the second part to withstand shear force during an impact in both vertical direction and horizontal direction, which restricts the separation of the second part from the first part.
[0017] In an aspect, the ribs may extend in a spider-shaped pattern from an outer peripheral surface of the corresponding bosses and may remain in contact with the surface of the first part in the Y-direction of the vehicle. Each of the ribs may comprise a first portion and a second portion, where the first portion may protrude radially from an outer peripheral surface of the boss, and the second portion may be formed in a form extending from an end of the first portion to be inclined with a radial direction of the boss, such that the second portion of the plurality ribs associated with each of the bosses are oriented parallel to each other
[0018] In an aspect, a first boss among the two adjacent bosses may have the ribs extending from the outer peripheral surface of a lower end of the corresponding boss and in contact with the surface of the first part in the Y-direction of the vehicle. Similarly, a second boss among the two adjacent bosses may also have the ribs extending from the outer surface of the lower end of the corresponding boss and in contact with the surface of the first part. The ribs of the first boss may be configured substantially perpendicular or parallel to each other and oriented in a first direction. Further, the ribs associated with the second boss may be configured substantially parallel to each other and oriented in a second direction which is different from the first direction. More particularly, the second direction is substantially perpendicular to the first direction. Thus, the ribs associated with two adjacent bosses are configured in a configuration selected from an alternate vertical-horizontal pattern, alternate vertical-vertical pattern, and alternate horizontal-horizontal pattern around the corresponding bosses. For instance, the ribs of the first boss may be oriented in a horizontal direction and the ribs of the second boss (adjacent boss) may be oriented in a vertical direction.
[0019] Accordingly, the horizontal ribs of the first boss may facilitate the first part and the second part to withstand shear force during an impact in the horizontal direction, and the vertical ribs of the second boss may facilitate the first part and the second part to withstand shear force during an impact in the vertical direction, thereby restricting separation of the second part from the first part.
[0020] For instance, during a crash when there is bending of the first part resulting in the application of shear forces on the weld bosses, the rib surface from the spider ribs comes in the contact with the mating peripheral rib surface of the hole. This phenomenon almost locks the X & Z relative movement in the welding boss area, which in turn distributes the shear forces along the contact surfaces of the spider ribs and the peripheral ribs of the holes, thereby reducing the chances of welding failure.
[0021] Thus, the present invention overcomes the above drawback, limitations, and shortcomings associated with existing fusion structures and techniques used in vehicles by providing a simple, cost-effective yet efficient and robust solution in form of a coupling assembly that efficiently couples two parts of a vehicle with a minimum number of welding bosses and welds, which is capable of efficiently withstanding impact on the vehicle in both vertical as well as horizontal directions, and restricting separation of the two coupled parts of the vehicle.
[0022] As a result, the present invention requires a comparatively less number of welds and bosses (fusion structures) compared to existing techniques, which makes the overall present invention cost-effective and simple, and also helps keep the overall weight of the structure under check or less than existing techniques.
[0023] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.
BRIEF DESCRIPTION OF DRAWINGS
[0024] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. The diagrams are for illustration only, which thus is not a limitation of the present disclosure.
[0025] In the figures, similar components and/or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label with a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label.
[0026] FIG. 1 illustrates an exemplary view of a first part of the proposed coupling assembly, in accordance with an embodiment of the present disclosure.
[0027] FIG. 2 illustrates an exemplary view of a second part of the proposed coupling assembly, in accordance with an embodiment of the present disclosure.
[0028] FIG. 3 illustrates an exemplary view of the proposed coupling assembly, wherein the second part is configured over the first part such that welding bosses of the first part engage with the holes of the second part, in accordance with an embodiment of the present disclosure.
[0029] FIG. 4 illustrates an exemplary top view depicting a single welding boss encircled and engrossed within a peripheral rib of the second part, in accordance with an embodiment of the present disclosure.
[0030] FIG. 5 illustrates an exemplary cross-sectional side view depicting the shear force distribution and withstanding capability of the proposed coupling assembly, in accordance with an embodiment of the present disclosure

DETAILED DESCRIPTION
[0031] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0032] In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent to one skilled in the art that embodiments of the present invention may be practiced without some of these specific details.
[0033] Embodiments of the present disclosure relate to a simple, cost-effective yet efficient and robust coupling assembly that efficiently couples two parts of a vehicle with a minimum number of welds, which is also capable of efficiently withstanding tension force and shear force in both vertical as well as horizontal directions and restricts separation of the two coupled parts in an event of a vehicular crash.
[0034] According to an aspect, the present disclosure elaborates upon a coupling assembly for two parts of a vehicle. The coupling assembly can include a first part associated with the vehicle and two or more welding bosses protruding from the surface of the first part and a plurality of ribs configured around each of the bosses. The plurality of ribs associated with two adjacent bosses among the two or more bosses can be configured in a configuration selected from an alternate vertical-horizontal pattern, alternate vertical-vertical pattern, and alternate horizontal-horizontal pattern around the corresponding bosses. Further, the coupling assembly can include a second part associated with the vehicle and two or more holes with a peripheral rib configured around each of the holes such that upon stacking the second part and the first part, each of the bosses passes through one of the holes and one of the peripheral ribs encircles and engrosses the plurality of ribs associated with one of the bosses. The two or more bosses are adapted to be melted once the second part and the first part are stacked, which results in the coupling of the first part and the second part.
[0035] In an embodiment, the plurality of ribs around of one of the bosses extends in a first direction and the plurality of ribs of other bosses extends in a second direction that is different from the first direction. Further, the first direction and the second direction are substantially perpendicular.
[0036] In an embodiment, the alternate pattern of the plurality of ribs around the two adjacent bosses can facilitate the first part and the second part to withstand shear force during an impact in both first direction and second direction, which can also restrict the separation of the second part from the first part.
[0037] In an embodiment, the first part can be selected from a carrier or any internal panel of the vehicle and the second part can be selected from one or more interior panels of the vehicle.
[0038] In an embodiment, the first part and the second part can be plastic parts of a door panel.
[0039] In an embodiment, the first part and the second part can be made of plastic.
[0040] In an embodiment, the plurality of ribs can be extended in a spider-shaped pattern from an outer peripheral surface of the corresponding boss and the plurality of ribs can remain in contact with the surface of the first part in the Y-direction of the vehicle.
[0041] In an embodiment, each of the ribs can include a first portion and a second portion. The first portion can protrude radially from an outer peripheral surface of the boss, and the second portion can be formed in a form extending from an end of the first portion to be inclined with a radial direction of the boss, such that the second portion of the plurality of ribs associated with each of the bosses are oriented parallel to each other.
[0042] In an embodiment, a first boss among the two adjacent bosses can include the plurality of ribs extending from an outer peripheral surface of a lower end of the corresponding boss and in contact with the surface of the first part. Each of the ribs can be configured substantially parallel to each other and oriented in a first direction.
[0043] In an embodiment, a second boss among the two adjacent bosses can include the plurality of ribs extending from an outer surface of the lower end of the corresponding boss and in contact with the surface of the first part. Each of the ribs can be configured substantially parallel to each other and oriented in a second direction perpendicular to the first direction.
[0044] In an embodiment, the peripheral ribs on the second part can have a peripheral dimension based on an overall outer dimension of the boss having the plurality of ribs, such that each of the peripheral ribs encircles and engrosses the plurality of ribs associated with one of the bosses.
[0045] Referring to FIGs. 1 to 4, the proposed coupling assembly 300 can include a first part 100 as shown in FIG. 1, and a second part 200 as shown in FIG. 2 associated with a vehicle. The first part 100 and the second part 200 can be associated with two plastic parts of one or more interior panels of the vehicle, which can be joined together by the proposed coupling assembly 300. In an embodiment, the first part 100 and second part 200 can be plastic parts associated with the door panel (or door assembly) of the vehicle.
[0046] As shown in FIG. 1, the first part 100 can include a plurality of welding bosses 102-1 to 102-3 (collectively referred to as welding bosses 102, herein) protruding from a surface of the first part 100 with a plurality of ribs 104-1, 104-2, or 104-3 (collectively referred to as ribs 104, herein) configured around each boss 102. For instance, four ribs 104-1 can be configured around boss 102-1, four ribs 104-2 can be configured around boss 102-2, and four ribs 104-3 can be configured around boss 102-3. The ribs 104 associated with two adjacent bosses can be configured in an alternate pattern. The ribs 104 can also remain in contact with the surface of the corresponding bosses 102. In an embodiment, the ribs 104 can be configured around the bosses 102 such that the ribs 104 associated with two adjacent bosses are configured in an alternate vertical-horizontal pattern around the corresponding bosses. For instance, as shown in FIG. 1, the ribs 104-1 associated with the boss 102-1 can be configured vertically and the ribs 104-2 associated with the boss 102-2 can be configured horizontally. In another embodiment (not shown), the ribs 104 can be configured around the bosses 102 such that the ribs 104 associated with two adjacent bosses are configured in vertical-vertical pattern or horizontal-horizontal pattern around the corresponding bosses. Further, as shown in FIGs. 2 and 3, the second part 200 can include a plurality of holes 202-1, 202-2 (collectively referred to as hole 202, herein) with a peripheral rib 204 configured around each of the holes 202 such that upon stacking the second part 200 and the first part 100, each of the bosses 102 passes through one of the holes 202 and one of the peripheral ribs 204 encircles and engrosses the plurality of ribs 104 associated with one of the bosses 102 as shown in FIGs. 3 and 4. The peripheral ribs 204 on the second part 200 can have a peripheral dimension based on an overall outer dimension of the boss having the plurality of ribs 104, such that each of the peripheral ribs 204 encircles and engrosses the plurality of ribs 104 associated with one of the bosses 102.
[0047] Furthermore, the welding bosses 102 are adapted to be melted using one or more known techniques, once the second part 200 and the first part 100 are stacked, which results in the coupling of the first part 100 and the second part 200. Accordingly, the alternate pattern of the plurality of ribs 104-1, 104-2 around the two adjacent bosses 102-1, 102-2 can facilitate the first part 100 and the second part 200 to withstand shear force during an impact in both vertical direction and horizontal direction, which also restricts the separation of the second part 200 from the first part 100. Besides, the tension force on the parts is supported by the longitudinal length or dome of the welding bosses 102.
[0048] Referring to FIG. 4, each of the ribs 104 can include a first portion 104-A and a second portion 104-B. The first portion 104-A can protrude radially from an outer peripheral surface of the boss 102, and the second portion 104-B can be formed in a form extending from an end of the first portion 104-A to be inclined with a radial direction of the boss 102, such that the second portion 104-B of the plurality ribs 104 associated with each of the bosses 102 are oriented parallel to each other and a spider-shaped rib configuration is formed around the corresponding bosses 102. The peripheral ribs 204 on the second part 200 can have a peripheral dimension based on an overall outer dimension of the boss 102 having the plurality of ribs 104, such that each of the peripheral ribs 204 encircles and engrosses the plurality of ribs 104 associated with one of the bosses 102.
[0049] Referring to FIG. 3, a first boss 102-1 among the two adjacent bosses 102-, 102-2 can include the plurality of ribs 104-1 extending from the outer peripheral surface of the lower end of the corresponding boss 102-1 which remains in contact with the surface of the first part 100. Further, each of the ribs 104-1 of the first boss 102-1 can be configured substantially parallel to each other and oriented in a first direction. A second boss 102-2 among the two adjacent bosses 102-1, 102-2 can include the plurality of ribs 104-1 extending from the outer surface of the lower end of the corresponding boss 102-2 which remains in contact with the surface of the first part 100. Further, each of the ribs 104-2 of the second boss 102-2 can be configured substantially parallel to each other and oriented in a second direction perpendicular or parallel to the first direction. In an embodiment, as shown, each of the ribs 104-1 associated with the first boss 102-1 can be oriented horizontally (in X-direction) and each of the ribs 104-2 associated with the second boss 102-2 can be oriented vertically (in Z-direction).
[0050] Those skilled in the art would appreciate that the horizontal ribs 104-1 of the first boss 102-1 can facilitate the first part 100 and the second part 200 of the vehicle withstand shear force during an impact in the horizontal direction (or X-direction), and the vertical ribs 104-2 of the second boss 102-2 can facilitate the first part 100 and the second part 200 withstand shear force during an impact in the vertical direction (or Z-direction), thereby restricting separation of the second part 200 from the first part 100. Also, the tension force on the parts 100, 200 is supported by the longitudinal length or dome of the welding bosses 102.
[0051] For instance, during a crash when there is bending of the first part 100 resulting in the application of shear forces on the bosses 102, the rib surface (marked A) from the spider ribs 104 comes in the contact with the mating peripheral rib surface (marked B) of the corresponding hole 202. This phenomenon locks the X & Z relative movement in the welding boss area, which in turn distributes the shear forces along the contact surfaces (A and B) of the spider ribs 104 and the peripheral ribs 204 of the holes, thereby reducing the chances of welding failure.
[0052] This also reduces the requirement of the number of welds and bosses (fusion structures) in the present invention compared to existing techniques, which makes the overall present invention cost-effective and simple, and also helps keep the overall weight of the structure under check or less than existing solutions.
[0053] Thus, the present invention overcomes the above drawback, limitations, and shortcomings associated with existing fusion structures and techniques used in vehicles and provides a simple, cost-effective yet efficient and robust solution in form of a coupling assembly that efficiently couples two parts of a vehicle with a minimum number of welding bosses and welds, which is also capable of efficiently withstanding impact on the vehicle in both vertical as well as horizontal directions, and restricting separation of the two coupled parts.
[0054] It is to be appreciated by a person skilled in the art that while various embodiments of the present invention have been elaborated for joining two parts associated with a door assembly, however, the teachings of the present invention is also applicable for joining any two parts associated any structure other than vehicles also, and all such embodiments are well within the scope of the present disclosure without any limitations.
[0055] Moreover, in interpreting the specification, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “comprises” and “comprising” should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refer to at least one of something selected from the group consisting of A, B, C ….and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc.
[0056] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION
[0057] The proposed invention overcomes the drawbacks, limitations, and shortcomings associated with existing fusion structures (welding bosses and corresponding through holes) and the fusion-based joining technique implemented in vehicles.
[0058] The proposed invention efficiently couples two parts of a vehicle. For instance, coupling two plastic parts associated with a door panel of the vehicle, but not limited to the like.
[0059] The proposed invention restricts welding failure and separation of the two plastic parts upon application of tension force and/or shear force in vertical and/or horizontal direction in an event of an impact on the vehicle.
[0060] The proposed invention increases the shear force withstanding capability of the welding bosses used in the existing fusion-based joining techniques.
[0061] The proposed invention provides a coupling assembly that requires a comparatively less number of welds and fusion structures compared to existing techniques, thereby making the overall technique cost-effective and simple, and keeping the overall weight of the structure under check.
[0062] The proposed invention provides a simple, cost-effective yet efficient and robust solution in form of a coupling assembly that efficiently couples two parts of a vehicle with a minimum number of welding bosses and welds, which is capable of efficiently withstanding impact on the vehicle in both vertical as well as horizontal directions, and restricting separation of the two coupled parts of the vehicle.

, Claims:1. A coupling assembly (300) for two parts of a vehicle, the coupling assembly (300) comprising:
a first part (100) comprising two or more welding bosses (102-1 to 102-3) protruding from a surface of the first part (100) and a plurality of ribs (104-1 to 104-3) configured around each of the bosses (102-1 to 102-3), wherein the plurality of ribs (104-1 to 104-3) associated with two adjacent bosses (102-1, 102-2, or 102-2, 102-3) among the two or more bosses (102-1 to 102-3) are configured in an alternate pattern around the corresponding bosses (102-1 to 102-3); and
a second part (200) comprising two or more holes (202-1 to 202-2), and a peripheral rib (204) configured around each of the holes (202-1 to 202-2) such that upon stacking the second part (200) and the first part (100), each of the bosses (102-1 to 102-3) passes through one of the holes (202-1 to 202-2) and one of the peripheral ribs (204) encircles and engrosses the plurality of ribs (104-1 to 104-3) associated with one of the bosses (102-1 to 102-3),
wherein the two or more bosses (102-1 to 102-3) are adapted to be melted once the second part (200) and the first part (100) are stacked, which results in the coupling of the first part (100) and the second part (200).
2. The coupling assembly (300) as claimed in claim 1, wherein the plurality of ribs of one of the bosses extends in a first direction and the plurality of ribs of other bosses extends in a second direction that is different from the first direction.
3. The coupling assembly (300) as claimed in claim 2, wherein the first direction and the second direction are substantially perpendicular.
4. The coupling assembly (300) as claimed in claim 1, wherein the first part (100) and the second part (200) are associated with one or more interior panels of the vehicle.

5. The coupling assembly (300) as claimed in claim 1, wherein the first part (100) and the second part (200) are associated with a door panel of the vehicle.
6. The coupling assembly (300) as claimed in claim 1, wherein the first part (100) and the second part (200) are made of plastic.
7. The coupling assembly (300) as claimed in claim 1, wherein the plurality of ribs (104-1 to 104-3) is extending in a spider-shaped pattern from an outer peripheral surface of the corresponding boss (102-1 to 102-3) and the plurality of ribs (104-1 to 104-3) remains in contact with the surface of the first part (100).
8. The coupling assembly (300) as claimed in claim 1, wherein each of the ribs (104-1 to 104-3) comprises a first portion (104-A) and a second portion (104-B), wherein the first portion (104-A) protrudes radially from an outer peripheral surface of the boss (102-1 to 102-3), and the second portion (104-B) is formed in a form extending from an end of the first portion (104-A) to be inclined with a radial direction of the boss (102-1 to 102-3), such that the second portion (104-B) of the plurality of ribs (104-1 to 104-3) associated with each of the bosses is oriented parallel to each other.
9. The coupling assembly (300) as claimed in claim 1, wherein a first boss (102-1) among the two adjacent bosses (102-1 to 102-3) comprises the plurality of ribs (104-1) extending from an outer peripheral surface of a lower end of the corresponding boss (102-1) and in contact with the surface of the first part (100), and wherein each of the ribs (104-1) is configured substantially parallel to each other and oriented in the first direction.
10. The coupling assembly (300) as claimed in claim 9, wherein a second boss (102-2) among the two adjacent bosses (102-1 to 102-3) comprise the plurality of ribs (104-2) extending from an outer surface of the lower end of the corresponding boss (102-2) and in contact with the surface of the first part (100), wherein each of the ribs (104-2) is configured substantially parallel to each other and oriented in the second direction perpendicular to the first direction.
11. The coupling assembly (300) as claimed in claim 1, wherein the peripheral ribs (204) on the second part (200) have a peripheral dimension based on an overall outer dimension of the boss having the plurality of ribs (104-1 to 104-3), such that each of the peripheral ribs (204) encircles and engrosses the plurality of ribs (104-1 to 104-3) associated with one of the bosses.