Engagement assembly for engaging with outer member

Abstract

The present application relates to an engagement assembly (100) for engaging with an outer member (200). The engagement assembly (100) comprises: a body (110), the body (110) being made of plastic and having a first outer surface (S1) in at least one region, and the body (110) being provided with at least one recess (111) recessed inwardly with respect to the first outer surface (S1) in the at least one region, the recess (111) having an opening (115); and an engagement member (120), the engagement member (120) being provided with an engagement portion (121) for engaging with the outer member (200). At least a portion of the engagement member (120) is arranged in the recess (111) and is limited by the recess (111) in a direction (F) of a load force, which is applied to the engagement member (120) by means of the outer member (200). The engagement assembly of the present application can achieve stable connection between the engagement member and a plastic body.

Description

Joining assembly for joining external components Technical Field

[0001] The present application relates to a joining assembly for joining external components, in particular to a blow-molded component embedded in a metal part during a molding process. Background Art

[0002] Plastic components are widely used in manufacturing, including injection molded parts, blow molded parts, and extruded parts. Wear and tear easily occur at the joints between plastic components and other components, shortening the product lifespan. To address this, joining components made of other materials, such as metal, are often used at these joints to prevent wear. However, these approaches require consideration of how to create a secure connection between the joining component and the plastic component and prevent disengagement, particularly during operation due to loads.

[0003] Furthermore, blow molded parts are limited in configuration due to their thin-walled, hollow structure and the fact that they are subject to inflation pressure during the molding process. This makes it particularly challenging to embed metal parts in a specific configuration to form a secure connection.

[0004] Summary of the Invention

[0005] The object of the present application is to provide a joining assembly for joining an external component, which comprises a body made of plastic and a joining piece for joining with the external component, and forms a stable connection between the joining piece and the plastic body.

[0006] The coupling assembly according to the present application specifically includes: a body, which is made of plastic and has a first outer surface in at least one area, and the body has at least one recessed portion in the at least one area that is recessed inward relative to the first outer surface, and the recessed portion has an opening; and a coupling member, which has a coupling portion for coupling the external component, wherein at least a portion of the coupling member is arranged in the recessed portion and is restricted by the recessed portion in the direction of the load force applied by the external component to the coupling member.

[0007] By placing at least a portion of the engaging member in the recess of the plastic body, and using the recess to resist the tendency of the engaging member to separate from the body due to the load of the external component, a stable connection between the engaging member and the body can be ensured.

[0008] In a preferred embodiment, the body is formed by a blow molding process, and the engaging member is embedded in the body during the blow molding process. By pre-embedding the engaging member during the molding process, the configuration of the recessed portion and the configuration of the portion of the engaging member in the recessed portion can be made complementary, thereby allowing the engaging member to be stably placed in, or even fixed to, the recessed portion.

[0009] In a preferred embodiment, a projection of a portion of the engaging element in the recess on the first outer surface overlaps a projection of an opening of the recess on the first outer surface with at least a first width.

[0010] In this application, "the projection of A on B at least overlaps the projection of C on B by a first width" means that the projection of A on B overlaps the projection of C on B, and the shortest distance between any point on the outer edge of the projection of C on B and the outer edge of the projection of A on B is greater than or equal to the first width. Therefore, "the projection of the portion of the engaging member within the recess on the first outer surface overlaps the projection of the opening of the recess on the first outer surface by at least a first width" can effectively ensure that the opening of the recess is small enough to secure the engaging member within the recess.

[0011] Preferably, the recessed portion has a side wall and a bottom, the side wall is provided with an edge extending parallel to the first outer surface at a position away from the bottom, and the edge defines an opening of the recessed portion.

[0012] Alternatively, the recessed portion has a side wall and a bottom, and the side wall is at least partially tapered in a direction away from the bottom.

[0013] By extending the edge or tapered side wall parallel to the first outer surface, it is possible to effectively ensure that the projection of the opening on the first outer surface is smaller than the projection of the part of the coupling in the recess on the first outer surface, thereby ensuring a particularly stable connection between the coupling and the body.

[0014] Optionally, the engaging portion is disposed within the recessed portion, and the engaging portion is centrally disposed within the engaging member and exposed through the opening. On one hand, the engaging portion centrally disposed within the engaging member is adapted to cooperate with the uniformly extending edge of the recessed portion, allowing the engaging portion to be exposed through the opening defined by the uniformly extending edge. On the other hand, the uniformly extending edge provides a stable structural strength to confine the engaging member within the recessed portion.

[0015] Preferably, the engaging portion includes at least one of a threaded hole, a hook, and a buckle.

[0016] Preferably, the body has a first wall thickness in portions other than the at least one region, and has a second wall thickness at least partially in the at least one region, the second wall thickness being greater than the first wall thickness. Providing a thicker wall structure in the at least one region can effectively enhance the structural strength of the joint, counteracting the problem of thinning and weakening of the wall thickness in this region during the molding process, particularly for blow molded parts.

[0017] Preferably, the portion having the second wall thickness in the at least one region is located at a connection with the recessed portion.

[0018] Preferably, the first width is greater than the first wall thickness, which further improves the structural strength of the concave portion's limiting structure on the joint.

[0019] Optionally, in order to at least partially form a second wall thickness greater than the first wall thickness in the at least one region, the joint piece may be provided with a flange at a position away from the opening, and the flange is covered by the side wall of the recessed portion.

[0020] Optionally, in order to at least partially form a second wall thickness greater than the first wall thickness in the at least one region, the first outer surface may be provided with a raised boss portion at a position close to the opening.

[0021] In a preferred embodiment, the body has a second outer surface opposite to the first outer surface, the bottom is provided with a through hole extending to the second outer surface, and the external component passes through the through hole from the second outer surface to engage with the engaging portion of the engaging member.

[0022] Preferably, the body has a first wall thickness, and the edge extends to a second width, the second width being less than or equal to the first wall thickness. More preferably, the second width is greater than or equal to 1 / 3 of the first wall thickness and less than or equal to 2 / 3 of the first wall thickness.

[0023] When the external member passes through the through-hole from the second outer surface and engages the engaging portion of the engaging member, the load force applied by the external member is primarily borne by the second outer surface and the bottom of the recessed portion, while the edge primarily serves to prevent the engaging member from separating from the body in the unloaded state. Therefore, the edge can be configured to be relatively small, which is particularly advantageous when the body is formed from a blow-molded part, as it can reduce the inflation pressure required for the blow-molded part molding process.

[0024] In a preferred embodiment, the portion of the joint member within the recess has a uniform cross-section and extends from the first outer surface along an extension direction, and wherein the angle between the direction of the load force applied by the external member on the joint member and the extension direction is less than or equal to 90°. The recess formed in this manner can retain the joint member in the recess when a load is applied to the joint member, and can be removed for easy replacement when the load is removed.

[0025] Optionally, the engaging portion includes at least one of a threaded hole, a hook, and a buckle.

[0026] Optionally, the joint is made of metal material. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To better understand the above and other objects, features, advantages, and functions of the present application, reference may be made to the preferred embodiments shown in the accompanying drawings. Like reference numerals in the accompanying drawings refer to like components. Those skilled in the art should understand that the accompanying drawings are intended to schematically illustrate preferred embodiments of the present application and have no limiting effect on the scope of the present application. The components in the drawings are not drawn to scale.

[0028] FIG1 shows a plan view of a first embodiment of a joint assembly of the present application;

[0029] FIG2 shows a cross-sectional view of the joint assembly of FIG1 taken along line AA;

[0030] FIG3 shows a plan view of a second embodiment of the joint assembly of the present application;

[0031] FIG4 a shows a cross-sectional view of the joint assembly in FIG3 taken along line BB;

[0032] FIG4 b shows a cross-sectional view of the joint assembly in FIG3 taken along line CC;

[0033] FIG5 shows a cross-sectional view of a third embodiment of the joint assembly of the present application;

[0034] FIG6 shows a cross-sectional view of the joint assembly of FIG5 taken along line DD;

[0035] FIG7 shows a cross-sectional view of a fourth embodiment of the joint assembly of the present application; and

[0036] FIG8 shows a cross-sectional view of the joint assembly in FIG7 taken along line EE. DETAILED DESCRIPTION

[0037] Now, with reference to the accompanying drawings, the specific embodiments of the present application will be described in detail. What is described here is only the preferred embodiment of the present application. Those skilled in the art may conceive of other ways to implement the present application based on the preferred embodiment, and the other ways also fall within the scope of the present application.

[0038] FIG1 shows a plan view of a first embodiment of a coupling assembly 100 of the present application. In this embodiment, the coupling assembly 100 is configured as a basic structure of a sofa armrest, such as a blow-molded part of a sofa armrest, and the external member 200 is configured as a bolt. The external member 200 is fixed to the coupling assembly 100 together with a bracket 300 on both sides of the flat first outer surface S1 of the coupling assembly 100. Here, the bracket 300 is formed by bending a metal plate, wherein the bracket 300 has a through hole. The external member 200 passes through the through hole in the bracket 300 and then engages with the coupling assembly 100, thereby fixing the bracket 300 to the coupling assembly 100.

[0039] FIG2 shows a cross-sectional view of the joint assembly 100 taken along line AA in FIG1 . As can be seen from the figure, the joint assembly 100 includes a body 110 and a joint member 120 , wherein the body 110 is formed by a blow molding process, and the joint member 120 is manufactured from a metal material in an annular shape and has a threaded hole centrally arranged therein, i.e., a joint portion 121 for engaging with the external member 200 (bolt). The body 110 can also be formed by injection molding, extrusion molding, wood molding, or other processes. The joint member 120 can be embedded in the body 110 during the molding process of the body 110.

[0040] The body 110 is provided with a recessed portion 111 in the region where the first outer surface S1 is located. The recessed portion 111 has a bottom 112 and a sidewall 113. The sidewall 113 is provided with an edge 114 extending parallel to the first outer surface S1 at a position away from the bottom 112. The edge 114 defines an opening 115 of the recessed portion 111. The engaging portion 121 is exposed through the opening 115 so that the external member 200 can engage with the engaging portion 121. The external member 200 applies a load force to the engaging member 120 along the load force direction F.

[0041] In this embodiment, the engaging member 120 is entirely located within the recess 111 and is restricted by the edge 114 of the recess 111 in the direction of the load force F applied by the external member 200, preventing it from escaping from the recess 111. Specifically, the edge 114 extends uniformly from the sidewall 113 along a direction parallel to the first outer surface S1 by a distance W1 and forms an annular portion, so that the projection of the engaging member 120 on the first outer surface S1 overlaps the projection of the opening 115 on the first outer surface S1 by a first width W1, that is, the projection of the engaging member 120 on the first outer surface S1 overlaps the projection of the opening 115 on the first outer surface S1, and the shortest distance from any point on the outer edge of the projection of the opening 115 on the first outer surface S1 to the outer edge of the projection of the engaging member 120 on the first outer surface S1 is greater than or equal to the first width W1. In other words, this enables the edge 114 to prevent the engaging member 120 from escaping from the body 110 by the annular portion it forms. This ensures a particularly stable connection between the engaging member 120 and the body 110. In other words, in this embodiment, after the body 110 is formed, the coupling member 120 and the body 110 are inseparable.

[0042] As a blow-molded part, the body 110 has a first wall thickness d1 for the vast majority of the body, or in other words, except for the area where the recess 111 is located. During the blow molding process of the body 110, the presence of the fastener 120 causes the walls of the body 110 to be stretched at the location of the fastener 120, thereby forming a third wall thickness d3 on the bottom 112 and sidewalls 113 that is smaller than the first wall thickness d1. Because the third wall thickness d3 is smaller than the first wall thickness d1, the fastener assembly 100 is weaker at the recess 111, or at the location of the fastener 120. However, this is where the fastener assembly 100 is often subjected to tensile loads from external components, and therefore, its strength requirements are often higher.

[0043] In order to strengthen the strength of the position where the coupling 120 is located, a second wall thickness d2 can be arranged in the area where the recessed portion 111 is arranged and at the connection with the recessed portion 111, and the second wall thickness d2 is greater than the first wall thickness d1. In this embodiment, this arrangement is achieved by providing an outwardly protruding boss portion 116 in the area where the recessed portion 111 is arranged, especially at a position close to the opening 115. In Figure 2, the boss portion 116 on the left is arranged closer to the opening 115 relative to the boss portion 116 on the right. The boss portion 116 extends circumferentially to the opening, thereby increasing the thickness of the second wall thickness d2 relative to the first thickness d1 and thus strengthening the structural strength of the connection with the recessed portion, effectively preventing the connection between the coupling 120 and the body 110 from being destroyed by the load force applied by the external component 200.

[0044] Furthermore, as described above, the edge 114 can block the engagement member 120 from separating from the body 110 by forming an annular portion therewith. It is therefore conceivable that the strength of this blocking structure increases with an increase in the width, i.e., W1, of the annular portion of the edge 114. In particular, in this embodiment, the first width W1 is equal to the first wall thickness d1, so that the restraint of the engagement member 120 by the recessed portion 111 provides substantial structural strength.

[0045] FIG3 shows a plan view of a second embodiment of the joint assembly 100 of the present application. In this embodiment, the joint assembly 100 is configured as a basic structure of a sofa base, such as a blow-molded part of the sofa base, and the external members 200 are configured as bolts. On the outer side of the flat first outer surface S1 of the joint assembly 100, two external members 200 are secured to the joint assembly 100 together with gaskets 400 near the ends. Near the center, two additional external members 200 are secured to the joint assembly 100 together with base brackets 500 (see FIG4 b).

[0046] FIG4 a shows a cross-sectional view of the joint assembly 100 in FIG3 taken along line BB. As can be seen from the figure, the joint assembly 100 includes a body 110 and a joint member 120, wherein the body 110 is formed by a blow molding process, and the joint member 120 is manufactured from a metal material into a nut having a flange 122 and a centrally arranged threaded hole, i.e., a joint portion 121 for engaging with the external member 200 (bolt). The body 110 can also be formed by injection molding, extrusion molding, wood molding, or other processes. The joint member 120 can be embedded in the body 110 during the molding process of the body 110.

[0047] The body 110 is provided with a recessed portion 111 in the region where the first outer surface S1 is located. The recessed portion 111 has a bottom 112 and a sidewall 113. The sidewall 113 is provided with an edge 114 extending parallel to the first outer surface S1 at a position away from the bottom 112. The edge 114 defines an opening 115 in the recessed portion 111. The engaging portion 121 is exposed through the opening 115, so that the external member 200 can engage with the engaging portion 121 through the opening 115 from the first outer surface S1. The external member 200 applies a load force to the engaging member 120 in the load force direction F. The sidewall 113 covers the flange 122 to form a covering portion.

[0048] In Figure 4a, the engaging member 120 is entirely located within the recess 111 and is constrained by the edge 114 of the recess 111 in the direction F of the load force applied by the external member 200, preventing it from disengaging from the recess 111. Specifically, the edge 114 extends uniformly from the sidewall 113 along a direction parallel to the first outer surface S1, forming an annular portion. Furthermore, the engaging member 120 includes a flange 122 covered by the sidewall 113, so that the projection of the engaging member 120 on the first outer surface S1 overlaps the projection of the opening 115 on the first outer surface S1 by a first width W1. In other words, this allows the edge 114, with its annular portion, and the sidewall 113, with its covering portion of the flange 122, to jointly prevent the engaging member 120 from disengaging from the body 110. This ensures a particularly secure connection between the engaging member 120 and the body 110. In other words, in this embodiment, after the body 110 is formed, the engaging member 120 and the body 110 are inseparable.

[0049] In particular, the flange 122 of the joint 120 is tapered on the side near the opening 115, and the side wall 113 is also partially tapered accordingly, thereby further ensuring a particularly stable connection between the joint 120 and the body 110. In addition, by arranging the outer side of the joint 120 to be at least partially tapered toward the opening 115, the side wall 113 can be formed with a configuration that tapers toward the opening 115 on the inner side, which can also ensure a particularly stable connection between the joint 120 and the body 110 without providing the edge 114.

[0050] Similarly, as a blow-molded part, the body 110 has a first wall thickness d1 for the majority of the body, or in other words, except for the area where the recessed portion 111 is located. However, a third wall thickness d3, which is smaller than the first wall thickness d1, is formed on the bottom 112 and sidewalls 113. To enhance strength at the location where the engaging member 120 is located, the sidewalls 113 of the recessed portion 111 have a second wall thickness d2 near the opening 115, which is greater than the first wall thickness d1. In this embodiment, this arrangement is achieved by arranging a flange 122 at a location on the engaging member 120 away from the opening 115.

[0051] Furthermore, as described above, the edge 114 can prevent the engagement member 120 from being separated from the body 110 by its annular portion and the sidewall 113 can prevent the engagement member 120 from being separated from the body 110 by its covering portion of the flange 122. It is therefore conceivable that the strength of this blocking structure increases as the sum of the widths W1 of the annular portion of the edge 114 and the covering portion of the sidewall 113 increases. In particular, in this embodiment, the first width W1 is greater than the first wall thickness d1, so that the recessed portion 111 has enhanced structural strength in restraining the engagement member 120.

[0052] FIG4 b shows a cross-sectional view of the joint assembly 100 taken along line CC in FIG3 . As can be seen from the figure, the joint assembly 100 includes a body 110 and another joint piece 120, wherein the body 110 is formed by a blow molding process, and the joint piece 120 is made of a metal material into a D-shaped metal plate having a flange 122 and a centrally arranged threaded hole (see FIG3 ), wherein the threaded hole serves as a joint portion 121 for engaging with the external member 200 (bolt). The body 110 can also be formed by injection molding, extrusion molding, wood molding, etc. The joint piece 120 can be embedded in the body 110 during the molding process of the body 110.

[0053] The body 110 is provided with a recessed portion 111 in the region where the first outer surface S1 is located. The recessed portion 111 has a bottom 112 and a sidewall 113. The sidewall 113 is provided with an edge 114 extending parallel to the first outer surface S1 at a position away from the bottom 112. The edge 114 defines an opening 115 of the recessed portion 111. The body 110 also has a second outer surface S2 opposite the first outer surface S1. The bottom 112 is provided with a through hole 117 extending through the second outer surface S2. The external member 200 passes through the through hole 117 from the second outer surface S2 and engages with the engaging portion 121 of the engaging member 120 to secure the base bracket 500 to the second outer surface S2 of the engaging assembly 100. The external member 200 applies a load force to the engaging member 120 along the load force direction F.

[0054] In FIG4 b , the joint member 120 is entirely located in the recessed portion 111 and is limited by the bottom 112 of the recessed portion 111 in the direction F of the load force applied by the external member 200. In particular, the edge 114 extends uniformly from the sidewall 113 along a direction parallel to the first outer surface S1 by the second width W2 and forms an annular portion, so that the projection of the joint member 120 on the first outer surface S1 overlaps the projection of the opening 115 on the first outer surface S1 with the first width (here the first width is equal to the second width W2). In other words, this enables the edge 114 to block the joint member 120 from detaching from the body 110 with the annular portion formed therewith. This ensures a stable connection between the joint member 120 and the body 110.

[0055] Similarly, as a blow molded part, the body 110 here has a first wall thickness d1, but a third wall thickness d3, which is smaller than the first wall thickness d1, is formed on the bottom 112 and sidewalls 113. Unlike Figure 4a, the load force applied by the external member 200 here is primarily borne by the bottom 112 of the recessed portion 111, while the edge 114 primarily serves to prevent the coupling 120 from separating from the body in the unloaded state. Therefore, the second width W2 extending from the edge 114 can be configured to be greater than 0 and less than or equal to the first wall thickness d1, and more preferably, to be greater than or equal to 1 / 3 of the first wall thickness d1 and less than or equal to 2 / 3 of the first wall thickness d1. This allows the edge 114 to be formed with a lower inflation pressure, which is extremely beneficial for the molding of the blow molded part.

[0056] FIG5 shows a plan view of a third embodiment of a joint assembly 100 of the present application. In this embodiment, the joint assembly 100 is configured as a basic structure of a sofa backrest, such as a blow-molded part of the sofa backrest, and the outer members 200 are configured as bolts. Two outer members 200, along with a connector 600 and a gasket 700 (see FIG6 ), are secured to the joint assembly 100 on the outside of the flat first outer surface S1 of the joint assembly 100.

[0057] FIG6 shows a cross-sectional view of the joint assembly 100 shown in FIG5 , taken along line DD. As can be seen from FIG5 and FIG6 , the joint assembly 100 includes a body 110 and a joint member 120. The body 110 is formed by blow molding, and the joint member 120 is manufactured from a metal material into an oblong metal plate having two threaded holes as a joint portion 121 for engaging with the external member 200 (bolt). The body 110 can also be formed by injection molding, extrusion molding, wood molding, or other processes. The joint member 120 can be embedded in the body 110 during the molding process.

[0058] The body 110 is provided with a recessed portion 111 in the region where the first outer surface S1 is located. The recessed portion 111 has a bottom 112 and a sidewall 113. The sidewall 113 is provided with an edge 114 extending parallel to the first outer surface S1 at a position away from the bottom 112. The edge 114 defines an opening 115 of the recessed portion 111. The body 110 also has a second outer surface S2 opposite to the first outer surface S1. The bottom 112 is provided with a through hole 117 extending through the second outer surface S2. The external member 200 passes through the through hole 117 from the second outer surface S2 and engages with the engaging portion 121 of the engaging member 120 to secure the connector 600 and the gasket 700 to the second outer surface S2 of the engaging assembly 100. The external member 200 applies a load force to the engaging member 120 along the load force direction F.

[0059] Similar to the embodiment in Figure 4b, in Figure 6, the joint 120 is entirely located in the recessed portion 111 and is restricted by the bottom 112 of the recessed portion 111 in the direction F of the load force applied by the external component 200, and cannot be separated from the recessed portion 111. The edge 114 extends uniformly from the side wall 113 along a direction parallel to the first outer surface S1 by the second width W2 and forms an annular portion, so that the projection of the joint 120 on the first outer surface S1 overlaps the projection of the opening 115 on the first outer surface S1 with a first width (here the first width is equal to the second width W2). In other words, this enables the edge 114 to block the joint 120 from the body 110 with the annular portion formed therewith. This ensures a stable connection between the joint 120 and the body 110.

[0060] Similarly, as a blow-molded part, the main body 110 here has a first wall thickness d1, but a third wall thickness d3 smaller than the first wall thickness d1 is formed on the bottom 112 and the side wall 113, and the second width W2 extended by the edge 114 is constructed to be equal to 2 / 3 of the first wall thickness d1, so that the edge 114 can be formed with a smaller blowing air pressure, which is conducive to the molding of the blow-molded part.

[0061] Figure 7 shows a plan view of a fourth embodiment of the coupling assembly 100 of the present application. In this embodiment, the coupling assembly 100 is configured as the basic structure of a sofa backrest, such as a blow-molded part of the sofa backrest, and the external member 200 is configured as a spring. The external member 200 is coupled to the coupling assembly 100 on the flat first outer surfaces S1 provided on the left and right sides of the coupling assembly 100.

[0062] FIG8 shows a cross-sectional view of the coupling assembly 100 in FIG7 taken along line EE. As can be seen from the figure, the coupling assembly 100 includes a main body 110 and a coupling member 120, wherein the main body 110 is formed by a blow molding process, and the coupling member 120 is made of a metal material into a bent metal hook having a uniform cross-section and a coupling portion 121 for coupling with the external member 200 (spring). The main body 110 can also be formed by injection molding, extrusion molding, wood molding, and the like. The coupling member 120 can be embedded in the main body 110 during the molding process of the main body 110. In particular, in this embodiment, the coupling member 120 can be separated from the main body 110 after the main body 110 is molded.

[0063] The body 110 is provided with a recessed portion 111 in the region where the first outer surface S1 is located. The recessed portion 111 has an opening 115 on the first outer surface S1 and is configured to extend concavely from the first outer surface S1 along an extension direction L to form a groove. Accordingly, the engaging member 120 has a bent section capable of entering the groove of the recessed portion 111 and an engaging portion 121 located outside the recessed portion. The bent section capable of entering the groove of the recessed portion 111 also extends from the first outer surface S1 along the extension direction L. After the external member 200 engages with the engaging portion 121 of the engaging member 120, a load force acting along a direction F is applied to the engaging member 120, wherein the extension direction L forms an acute angle α with the load force direction F. In this case, even if the coupling member 120 is not fixed in the recessed portion 111, the coupling member 120 can still be restricted by the sidewall 113 of the recessed portion 111 in the direction of the load force F applied by the external member 200. That is, under the continuous load force of the external member 200, the coupling member 120 can also establish a stable connection with the body 110. In particular, the angle between the extension direction L and the load force direction F needs to be less than or equal to 90°, preferably between 30° and 60°.

[0064] The joint 120 detachable from the main body 110 can be easily replaced and is particularly suitable for situations where the load force direction F is stable and not perpendicular to the first outer surface S1 , and especially suitable for situations where the load force direction F is parallel to the first outer surface S1 .

[0065] The above description of the various embodiments of the present application is provided to one of ordinary skill in the relevant art for the purpose of description. It is not intended that the present application be exclusive or limited to a single disclosed embodiment. As above, a person of ordinary skill in the art will understand the various substitutions and modifications of the present application. Therefore, although some alternative embodiments are specifically described, a person of ordinary skill in the art will understand or relatively easily develop other embodiments. The present application is intended to include all substitutions, modifications and variations of the present application described herein, as well as other embodiments that fall within the spirit and scope of the present application described above.

[0066] Reference Signs List 100 Joint assembly 110 Body 111 Recessed portion 112 Bottom 113 Sidewall 114 Edge 115 Opening 116 Boss portion 120 Joint member 121 Joint portion 122 Flange 200 External member 300 Bracket 400 Gasket 500 Base bracket 600 Connector 700 Gasket S1 First outer surface S2 Second outer surface d1 First wall thickness d2 Second wall thickness d3 Third wall thickness W1 First width W2 Second width F Load force direction L Extension direction α Angle between the extension direction and the load force direction

Claims

1. A joining assembly (100) for joining an external component (200), characterized in that: The engagement assembly (100) comprises: A body (110) made of plastic and having a first outer surface (S1) in at least one region, and having at least one recessed portion (111) inwardly recessed relative to the first outer surface (S1) in the at least one region, the recessed portion (111) having an opening (115); and A coupling member (120) having a coupling portion (121) for coupling with the external member (200), wherein at least a portion of the coupling member (120) is arranged in the recessed portion (111) and is limited by the recessed portion (111) in the direction (F) of the load force applied by the external member (200) to the coupling member (120).

2. The joint assembly (100) according to claim 1, characterized in that The body (110) is formed by a blow molding process, and the engaging piece (120) is embedded in the body (110) during the blow molding process of the body (110).

3. The joint assembly (100) according to claim 1 or 2, characterized in that: The projection of the portion of the engaging member (120) within the recess (111) on the first outer surface (S1) at least overlaps the projection of the opening (115) of the recess (111) on the first outer surface (S1) by a first width (W1).

4. The joint assembly (100) according to claim 3, characterized in that The recessed portion (111) has a side wall (113) and a bottom (112), and the side wall (113) is provided with an edge (114) extending parallel to the first outer surface at a position away from the bottom (112), and the edge (114) defines an opening (115) of the recessed portion (111).

5. The joint assembly (100) according to claim 3, characterized in that The recessed portion (111) has a side wall (113) and a bottom (112), and the side wall (113) is at least partially tapered in a direction away from the bottom (112).

6. The joint assembly (100) according to claim 3, characterized in that The engaging portion (121) is arranged in the recessed portion (111), and the engaging portion (121) is centrally arranged in the engaging member (120) and exposed through the opening (115).

7. The joint assembly (100) according to claim 3, characterized in that The body (110) has a first wall thickness (d1) in a portion other than the at least one region, and has a second wall thickness (d2) at least partially in the at least one region, the second wall thickness (d2) being greater than the first wall thickness (d1).

8. The joint assembly (100) according to claim 7, characterized in that The portion having the second wall thickness (d2) in the at least one region is located at a connection with the recessed portion (111).

9. The joint assembly (100) according to claim 7, characterized in that The first width (W1) is greater than the first wall thickness (d1).

10. The joint assembly (100) according to claim 7, characterized in that The engaging member (120) is provided with a flange (122) at a position away from the opening (115), and the flange (122) is covered by the side wall (113) of the recessed portion (111).

11. The joint assembly (100) according to claim 7, characterized in that The first outer surface (S1) is provided with a raised boss portion (116) at a position close to the opening (115).

12. The joint assembly (100) according to claim 4, characterized in that The body (110) has a second outer surface (S2) opposite to the first outer surface (S1), the bottom (112) is provided with a through hole (117) penetrating to the second outer surface (S2), and the external component (200) passes through the through hole (117) from the second outer surface (S2) to engage with the engaging portion (121) of the engaging member (120).

13. The joint assembly (100) according to claim 12, characterized in that The body (110) has a first wall thickness (d1), and the edge extends with a second width (W2), and the second width (W2) is less than or equal to the first wall thickness (d1).

14. The joint assembly (100) according to claim 13, characterized in that The second width (W2) is greater than or equal to 1 / 3 of the first wall thickness (d1) and less than or equal to 2 / 3 of the first wall thickness (d1).

15. The joint assembly (100) according to claim 1 or 2, characterized in that The portion of the engaging member (120) within the recessed portion (111) has a uniform cross-section and extends from the first outer surface (S1) along an extension direction (L), and wherein an angle between a direction (F) of a load force applied by the external component (200) on the engaging member (120) and the extension direction (L) is less than or equal to 90°.

16. The joint assembly (100) according to claim 1 or 2, characterized in that The engaging portion (121) comprises at least one of a threaded hole, a hook, and a buckle.

17. The joint assembly (100) according to claim 1 or 2, characterized in that The joint (120) is made of metal material.

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