CN220553626U - Tail accessory - Google Patents

Abstract

A tail accessory (T) includes a tail accessory body configured as a hollow cylinder formed by splicing at least a first half (P1) and a second half (P2). The tail accessory is convenient to manufacture, refit and maintain through mortise and tenon type splicing installation design.

Description

Tail accessory

Technical Field

The present utility model relates to the field of electrical harness assemblies. In particular, the present utility model proposes a tail accessory that may be used with an electrical harness on an aircraft.

Background

Tail fittings are a relatively common component in the electrical connection arts, commonly used for stress relief and electrical shielding overlap.

For example, a connector is known from CN 106443898A (publication date: 22 nd 2 th 2017). In the connector, when the locking claw on the inner shell is pushed by the closing-in structure of the outer shell, the locking claw contracts to clamp the clamping section on the tail accessory, and meanwhile, the rear side of the clamping section is provided with the extending section which extends out of the inner shell; the rear side of the closing-in structure on the outer shell is provided with a matching section matched with the extending section in a guiding and moving way, and a sliding sealing structure is arranged between the extending section and the matching section, so that the locking claw at the rear end of the inner shell is sealed, and impurities such as moisture and dust in the environment are prevented from entering the inner shell and the outer shell through gaps at the locking claws.

Also known from CN 217281389U (publication date: 2022, 8, 23) is a sealed connector comprising: the socket comprises a socket shell and a first sealing piece, wherein the socket shell is of a sleeve-shaped structure, the inner wall of the socket shell is provided with a groove extending along the circumferential direction, and the first sealing piece is arranged in the groove; the plug which is in plug-in fit with the socket comprises a plug shell, a tail accessory and a wire sealing body. The plug shell is sleeved with the socket shell at the groove, a tail accessory is arranged at one end of the plug shell far away from the socket, the wire sealing body is arranged at the joint of the plug shell and the tail accessory, a first bulge is arranged on the wire sealing body, and the first bulge is clamped with the inner wall of the plug shell. The airtight connector protects the cable through axial and radial airtight, prevents insulation from being lowered, and can prevent water and short circuit.

Tail accessories are also used in aircraft. Taking the example of a straight design of the tail attachment, it is generally constructed in one piece and is specifically designed as a hollow cylinder. In making the harness, the wires first pass through the cavity of the tail accessory and then terminate to the connector. After all wires have been threaded through the tail fitting, the tail fitting is threadably secured to the tail end of the connector.

However, for such a one-piece construction of the tail accessory, the following problems have been found in the art to occur when in use.

First, in the manufacture of wire harnesses, the wires need to be passed through the tail accessory and then terminated to the connector, which makes the wires of the tail accessory to be passed through more when the wire harness to be manufactured is large in diameter, which may pose a difficulty to the operator.

Secondly, when the outlet of the tail accessory is required to be angled according to the trend of the wire harness, the difficulty of inserting the wire through the tail accessory T' is also pronounced. For example, in the case of such a single piece tail accessory with a 45 angle outlet.

Again, due to the connection relationships and the order of connection of the wires, the tail accessory and the connectors to each other as described above, operational difficulties may be faced if the specific composition of the wire harness should also be changed, such as adding new wires, for the case where the wire harness assembly connection has been completed. Especially if the original wire harness diameter is already relatively large and new wires are also required to be added to terminate to the connector through the tail accessory, the new wires may not be able to plug into the cavity of the tail accessory.

In order to solve the problem that the outlet of the tail accessory is provided with an angle, a combined connector accessory is known from CN 110911885A (publication date: 3/24/2020), and is divided into a primary component and a secondary component, wherein the primary component is of a tubular structure, one end of the primary component is connected with a connector through threads, the outlet direction of the tail end of the primary component forms an included angle of 45 degrees with the central line of the original tube structure, and the primary component is connected with the secondary component through a quick-release mounting mode; one end of the secondary component is of a pipe structure, the other end of the secondary component is of a single-arm structure, and the tail end outgoing line direction of the single-arm structure and the central line of the original pipe structure form an included angle of 45 degrees. The connector accessory realizes variable multiple wire harness installation angles on the same connector accessory by adjusting the installation angle between the primary component and the secondary component of the connector accessory. However, in the combined connector accessory, since different appearance angles are adapted by different combinations of the primary component and the secondary component which are themselves provided with angles, the appearance angles to which the connector accessory can be adapted are still limited, specifically limited to only a few different angles of straight type, 45 ° and 90 °, and cannot be adapted to any installation angle.

CN 217182507U (publication date: 2022, 8, 12) proposes a tail attachment in the form of a double-row clip, comprising: first clamp plate, cable cover, cable and splint hold in the palm, and wherein, cable cover one end bottom outer wall is equipped with splint and holds in the palm, and the inside grafting of cable cover has the cable, and splint holds in the palm top one side and is located the cable outside and be equipped with first clamp plate, and splint holds in the palm top opposite side and is located the cable outside and be equipped with the second clamp plate, and this afterbody annex mainly used is after the cable is fixed to be accomplished, improves the clamping force of cable under vibration environment. In the tail accessory, due to the structure of the clamp plate provided with the opening, the tightness and the shielding performance are weakened, and the tail accessory has the advantages of more component parts, higher cost and more complex installation.

Disclosure of Invention

The present utility model is based on the task of providing an improved trailing attachment which ameliorates or avoids at least one of the disadvantages of the prior art trailing attachments described at the outset.

The tail accessory according to the present utility model includes a tail accessory body configured as a hollow cylinder formed by splicing at least a first half and a second half. By means of the design structure of the spliced tail accessory, the tail accessory can be conveniently installed and detached, so that when the wire harness is manufactured, wires forming the wire harness can be firstly connected to the connector, and then the first half part and the second half part are covered on the wire harness and spliced to form the tail accessory, the situation that the tail accessory cannot smoothly pass through the tail accessory due to the fact that the wire harness is large in diameter or cannot conform to the trend of the wire harness due to the fact that the wire harness is required to be out of line angle can be avoided, and therefore better shielding effect and stress release effect can be provided by the tail accessory.

Similarly, for example, when a wire harness requires the addition of new wires as described above, the wire harness may be modified by first separating the spliced first and second halves from each other, terminating the new wires to the connector, and then splicing the first and second halves again to form the tail attachment, thereby avoiding the situation where the new wires cannot pass through the tail attachment and thus the wire harness cannot be modified. The same applies to the case where the wire harness requires maintenance.

Therefore, the tail accessory disclosed by the utility model can be conveniently and quickly assembled and installed, and is beneficial to the manufacture, modification and maintenance of a wire harness by technicians.

Further, in order to prevent the spliced first and second halves from being accidentally separated from each other, thereby affecting the shielding effect and the stress relief effect, the utility model provides that the first and second halves are fastened to each other by means of at least one fastener.

Preferably, the at least one fastener is at least one metal clip.

More preferably, two metal clips are provided for binding the first half and the second half.

It is further preferred that the two metal clips are disposed proximate to the ends of the tail-fitting body in a columnar configuration, respectively, so that the ligating force is applied relatively uniformly to the ends of the tail-fitting body, avoiding tilting of the two halves away from each other at the other end of the tail-fitting body, or even deformation of the tail-fitting body, due to an imbalance in the ligating force application, such as concentration at one end of the tail-fitting body.

It is also conceivable that the first half and the second half are detachably fastened by means of other fasteners, for example by means of threaded connections.

In one embodiment of the utility model, the outer peripheral surface of the tail accessory body is provided with at least one receiving groove for receiving a metal clip for binding the first half and the second half.

Preferably, the outer peripheral surface of the tail attachment body is provided with two receiving grooves. They are respectively arranged near the two ends of the tail accessory body.

In a preferred embodiment of the utility model, the first half and the second half have the same construction and are each configured as a substantially semi-cylindrical shell. The receiving groove is formed by the connection of two half grooves provided on the circumferential faces of the first half and the second half, respectively, at corresponding axial positions.

Preferably, in order to facilitate positioning of the first half and the second half relative to each other when splicing the first half and the second half, a positioning mechanism is provided at the radial end faces of the first half and the second half, in order to improve the splicing efficiency.

Since the housings forming the first and second halves have a certain thickness, two radial end faces, namely a first radial end face and a second radial end face of the first half, and a third radial end face and a fourth radial end face of the second half, are formed at their respective radial end portions, respectively. When the first half and the second half are spliced together to form the tail accessory body of the tail accessory, the first radial end face of the first half is abutted against the fourth radial end face of the second half, and the second radial end face of the first half is abutted against the third radial end face of the second half. The positioning means are arranged at least one set of radial end faces which thus abut each other.

Specifically, in an embodiment of the present utility model, the positioning mechanism includes at least one protruding portion and at least one recessed portion, and when the first half and the second half are spliced, one protruding portion is inserted into the corresponding one of the recessed portions, thereby forming a mortise-tenon type splice between the first half and the second half.

For example, a first projection is provided at a first radial end face of the first half and a fourth recess is provided at a fourth radial end face of the second half, the fourth recess being at a height corresponding to the height of the first projection. Thus, the first male portion is inserted into the fourth female portion when the first half is spliced with the second half to form the tail accessory body.

In another non-limiting embodiment, the positioning mechanism further comprises a first recess provided at the first radial end face of the first half and a fourth protrusion provided at the fourth radial end face of the second half. Similar to the first convex portion and the fourth concave portion, the first concave portion is located at a height corresponding to the height of the fourth convex portion. Thus, the fourth protrusion is inserted into the first recess when the first half is spliced with the second half to form the tail accessory body.

In yet another non-limiting embodiment, the positioning mechanism further includes a second protrusion disposed at the second radial end surface of the first half and a third recess disposed at the third radial end surface of the second half, the second protrusion and the third recess configured such that the second protrusion inserts into the third recess when the first half and the second half are spliced to form the tail accessory body.

Optionally, the positioning mechanism further comprises a second recess provided at the second radial end face of the first half and a third protrusion provided at the third radial end face of the second half, configured such that the third protrusion is inserted into the second recess when the first half is spliced with the second half to form the tail attachment body.

Alternatively, a set of projections and recesses are formed on both radial end faces of one half, respectively, i.e. a first set of projections and recesses on one radial end face and a second set of projections and recesses on the other radial end face. The convex portions in the first group and the concave portions in the second group are disposed at the same height, and the concave portions in the first group and the convex portions in the second group are disposed at the same height, and the convex portions in the first group are disposed at a higher height than the concave portions of the first group. The other half part is also designed and constructed similarly, so that the two half parts spliced to form the tail accessory body have the same structure, and therefore, even if a positioning mechanism for mortise and tenon type splicing is arranged, the half parts can be produced by only manufacturing a mold of one half part, the production mold opening cost is reduced, and the production efficiency is improved.

Further, an internal thread is provided on an inner peripheral surface at one end of the tail fitting body for engagement with an external thread provided at the end of the connector, thereby fastening and locking the tail fitting thread to the rear side of the connector.

The tail accessory realizes the structure of a mortise and tenon type splicing design, and is convenient for manufacturing, refitting and maintaining the wire harness.

Drawings

The above features and other features of the utility model will be described hereinafter with reference to embodiments shown in the drawings, which are intended to be illustrative rather than limiting.

FIG. 1 is a schematic illustration of a tail accessory of one-piece construction locked to a connector after the harness is terminated to the connector in the prior art;

FIG. 2 is an exploded perspective view of the tail attachment according to the present utility model; and

fig. 3-5 illustrate the process of installing the tail accessory according to the present utility model shown in fig. 2 to a connector that has been terminated with a wire.

List of reference numerals:

c connector

End of CE (connector)

F1, F2, F3, F4 radial end faces

L harness

N1, N2 receiving groove

N1.1, N1.2, N2.1, N2.2 half-grooves

R metal clamping belt

S1 first end (of trailing attachment)

S2 second end (of trailing attachment)

T-tail accessory

P1 first half

P2 second half

21. 22, 23, 24 projections

31. 32, 33, 34 recesses

101. Internal thread

102. And (5) external threads.

Detailed Description

While the utility model will be described in conjunction with the exemplary embodiments, those skilled in the art will appreciate that the present description is not intended to limit the utility model to such exemplary embodiments. On the contrary, the utility model is intended to cover not only the exemplary embodiment but also various alternatives, modifications, equivalents, and the like, which may be included within the spirit and scope of the utility model as defined by the appended claims. For convenience in explanation and accurate definition in the appended claims, the terms "upper", "lower", "inner" and "outer" are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures, unless otherwise indicated.

Referring first to fig. 2, fig. 2 shows a tail fitting T for lap shielding and strain relief of a harness after the wires L are terminated to the connector C to form the harness.

The tail accessory T is integrally constructed as a generally cylindrical hollow body formed by splicing a first half P1 and a second half P2.

The tail accessory T has a first end S1 and a second end S2, in the illustrated embodiment, the radius of the first end S1 is greater than the radius of the second end S2. An internal thread 101 is provided on the inner peripheral surface of the first end S1 for screwing with an external thread provided at the connector C, thereby fastening the tail accessory T to the connector C.

In use, the first half P1 and the second half P2 are spliced to form the body of the tail accessory T, and the first half P1 and the second half P2 are fastened together by means of a metal clip R (not shown in fig. 2) to avoid accidental release of the two halves P1, P2 from each other, and the spliced and fastened tail accessory T is then screwed to the connector C to which the harness has been terminated. This installation process will be explained in more detail below in connection with fig. 3-5.

Returning now to fig. 2, the first half P1 and the second half P2 are generally configured as shell-like half cylinders, each extending substantially 180 ° in angular space. The first half P1 is formed with radial end faces F1, F2 and the second half P2 is formed with radial end faces F3, F4 due to the material thickness of the material from which the shell is made. When the first half P1 and the second half P2 are spliced to form the tail accessory body of the tail accessory T, the first radial end face F1 of the first half P1 abuts against the fourth radial end face F4 of the second half P2, and the other radial end face of the first half P1, that is, the second radial end face F2 abuts against the third radial end face F3 of the second half P2.

In order to facilitate positioning when the first half P1 and the second half P2 are spliced, at the two radial end faces F1, F2 of the first half P1, there are provided a first convex portion 21 protruding outward from the first end face F1 in the tangential direction at the end face F1, a first concave portion 31 concave inward in the tangential direction, and a second convex portion 22 protruding outward from the second radial end face F2 in the tangential direction at the end face F2, a second concave portion 32 concave inward in the tangential direction, respectively. In other words, here, the convex portion and the concave portion are formed to extend inward and outward from the end faces F1, F2 in a direction orthogonal to the end faces F1, F2.

In the illustrated embodiment, it is noted that the first convex portions 21, the first concave portions 31, and the second convex portions 22, the second concave portions 32 are staggered in the height direction of the tail accessory T. In other words, the first convex portion 21 and the second concave portion 32 are the same in distance from the upper end portion of the first half portion P1, and the first concave portion 31 and the second convex portion 22 are also the same in distance from the upper end portion of the first half portion P1, and the first convex portion 21 located on the same radial end face F1 is closer to the upper end portion of the first half portion P1 than the first concave portion 31, that is, closer to the first end S1 of the trailing attachment T.

Similarly, the two radial end faces F3, F4 of the second half P2 are provided with a third convex portion 23, a third concave portion 33 at the third radial end face F3, and a fourth convex portion 24, a fourth concave portion 34 at the fourth radial end face F4, respectively. In the second half portion P2, the third convex portion 23 and the fourth concave portion 34 are at the same height, the third concave portion 33 and the fourth convex portion 24 are at the same height, and the third concave portion 33 located on the same radial end face F3 is larger in distance from the upper end portion of the second half portion P2 than the third convex portion 23.

The height refers to the distance between the upper ends of the first and second halves P1 and P2 measured in the axial direction of the first and second halves P1 and P2

In the illustrated embodiment, the first half P1 and the second half P2 are also each configured such that: in the spliced state of the tail accessory T, the first convex portion 21 and the fourth concave portion 34, which are provided at the two radial end faces that will abut against each other, i.e., at the first radial end face F1 and the fourth radial end face F4, are at the same height, and the first concave portion 31 is configured to be at the same height as the fourth convex portion 24, the second concave portion 32 and the third convex portion 23, which are provided at the second radial end face F2 and the third radial end face F3, are at the same height, and the second convex portion 22 and the third concave portion 33 are at the same height.

The configuration is such that, when splicing the tail accessory T, the first projecting portion 21 is inserted into the fourth recessed portion 34, the second projecting portion 22 is inserted into the third recessed portion 33, the third projecting portion 23 is inserted into the second recessed portion 32, and the fourth projecting portion 24 is inserted into the first recessed portion 31, whereby the mortise-tenon type splicing of the tail accessory T is achieved.

The staggered arrangement of the respective convex portions 21, 22, 23, 24 and concave portions 31, 32, 33, 34 of the first half P1 and the second half P2 up and down contributes to a more uniform application of the joining force, and such a staggered arrangement makes the first half P1 and the second half P2 identical in construction, so that only a mold of one half needs to be manufactured in actual manufacturing, contributing to an improvement in manufacturing and splicing efficiency of the tail accessory T.

Of course, other configurations of the first half P1 and the second half P2 are also conceivable.

In an embodiment not shown, it is also possible to provide the same half, for example two projections 21, 22 on the first half P1 and two projections 23, 24 on the second half P2 each at the same level, and to provide corresponding recesses on the other half, for example two recesses 33, 34 on the second half P2 and two recesses 31, 32 on the first half P1 each at the corresponding same level.

In another embodiment, not shown, it is possible to provide only the projections 21, 22, 23, 24 on one of the two halves, for example on the two radial end faces F1, F2 of the first half P1, and only the recesses 31, 32, 33, 34 on the other half, for example on the two radial end faces F3, F4 of the second half P2.

Furthermore, in the embodiment shown in fig. 2, a projection and a recess are provided on one radial end face F1, F2, F3, F4 of each half P1, P2. However, in an embodiment not shown, more projections and/or recesses may be provided on one radial end face F1, F2, F3, F4 of each half P1, P2, as actually required.

Returning again to fig. 2, as can be seen in the figure, half grooves N1.1, N2.1 and N1.2, N2.2 are also provided on the outer circumferential surfaces of the first half P1 and the second half P2, respectively. When the first half P1 and the second half P2 are spliced, the half grooves N1.1 and N2.1 formed in the first half P1 are aligned with the half grooves N1.2 and N2.2 formed in the second half P2, respectively, to form receiving grooves N1 and N2 for receiving the metal clip R fastening the first half P1 and the second half P2 together. The width dimensions of the receiving grooves N1, N2 are determined to correspond to the width dimensions of a standard metal clip.

In the embodiment shown, the first and second receiving grooves N1, N2 are provided on both sides of the intermediate section of the trailing attachment T provided with the convex portions 21, 22, 23, 24 and the concave portions 31, 32, 33, 34, respectively, in the axial direction of the trailing attachment T. In other words, the first and second receiving grooves N1 and N2 are disposed closer to the first and second ends S1 and S2 of the tail accessory T, respectively.

This arrangement ensures that the first half P1 and the second half P2 are not lifted from each other at the other end of the tail accessory, e.g. the first end S1, by the fastening force concentrating at the one end of the tail accessory T when fastening the first half P1 and the second half P2 with the two metal clips R.

The mounting process of the tail accessory T according to the present utility model is explained below with reference to fig. 3 to 5.

In fig. 3, only the second half P2 of the tail accessory T is shown for clarity. As shown in fig. 3, in manufacturing the wire harness, the wire L is first terminated to the end CE of the connector C. At this time, the wire L is accommodated in the hollow half of the second half P2. After termination is completed, the first half P1 and the second half P2 are covered from the upper and lower sides of the wire harness, respectively.

Referring next to fig. 4, the first half P1 and the second half P2 are butted by the guide of the respective convex portions 21, 22, 23, 24 and concave portions 31, 32, 33, 34 provided on the first half P1 and the second half P2.

Next, two metal clips R are placed in the first receiving groove N1 and the second receiving groove N2, respectively, and the first half P1 and the second half P2 are bound together such that the first half P1 and the second half P2 are fastened to each other.

Finally, referring to fig. 5, the tail accessory T is screwed and locked to the rear of the connector C by means of an internal thread 101 provided on the inner peripheral surface of the first end S1 of the tail accessory T and an external thread 102 provided on the outer peripheral surface of the tip CE of the connector C.

Thereby enabling the installation of the tail accessory T.

When, for example, the tail fitting T needs to be removed to adjust the angle of the outgoing line or a new wire L needs to be added to the wire harness, the threaded connection between the internal thread 101 of the tail fitting T and the external thread 102 of the connector C is first loosened. Then, the metal clip R received in the first receiving groove N1 and the second receiving groove N2 is cut, and then the two halves P1, P2 of the mortise-tenon type splice are separated from each other by removing the protrusions 21, 22, 23, 24 from the corresponding recesses 34, 33, 32, 31, thereby completing the disassembly of the tail accessory T. Thereafter, the wire outlet angle of the wire harness can be adjusted or a new wire can be added to the wire harness, and finally the splicing and fixing steps explained above with reference to fig. 4 are repeated to complete the reinstallation of the tail attachment T. Only the new metal clip R needs to be replaced during the whole process.

The utility model provides a tail accessory with a mortise-tenon type splicing structure, which enables wires to be directly terminated into a connector when a wire harness is manufactured, two halves forming the tail accessory are covered outside the wire harness after termination is finished, the complete tail accessory is formed through mortise-tenon type splicing, the tail accessory is fastened by a metal clamping belt, and finally the tail accessory is mounted to the connector.

Therefore, the tail accessory is more convenient in the aspects of installing, changing the wire harness and later disassembling and maintaining, and meanwhile, the wire adding difficulty caused by the large wire diameter of the existing wire harness is avoided. Because the tail accessory can be constructed by disconnecting the two halves, terminating the newly added wire first to the connector, and then re-capping and splicing the two halves, the wire harness addition can be completed as long as the diameter of the resulting wire harness is still less than the smallest diameter of the cavity of the tail accessory.

In the case of the outlet of the tail accessory having an angle, the harness is terminated to the connector, and then the first half and the second half constituting the tail accessory are covered on the harness for splicing, so that the tail accessory can meet the trend of the harness to the greatest extent.

Similarly, when the harness is to be modified, the tail accessory according to the present utility model can be simply detached from the harness by releasing the fastened metal clip R, and after the harness modification is completed, the tail accessory is spliced again to the harness.

The present utility model can be freely combined with each other, or can be appropriately modified and omitted within the scope of the present utility model.

Claims (6)

1. A tail accessory (T), characterized in that it comprises a tail accessory body configured as a hollow cylindrical body formed by splicing at least a first half (P1) and a second half (P2), wherein the first half (P1) and the second half (P2) are fastened to each other by means of at least one metal clip (R), and wherein at least one receiving groove (N1, N2) is provided on the outer circumferential surface of the tail accessory body for receiving the at least one metal clip (R), and wherein the first half (P1) and the second half (P2) are configured as semi-cylindrical bodies, and wherein positioning means are provided at the radial end faces of the first half (P1) and the second half (P2) for positioning the first half (P1) and the second half (P2) relative to each other upon splicing.

2. The tail accessory (T) as claimed in claim 1, wherein the positioning means comprise at least a first male portion and a fourth female portion,

wherein the first projection is provided at a first radial end face (F1) of the first half (P1) and the fourth recess is provided at a fourth radial end face (F4) of the second half (P2), and

when the first half part (P1) and the second half part (P2) are spliced to form the tail accessory body, the first radial end face (F1) is abutted against the fourth radial end face (F4), and the first protruding part is inserted into the fourth recessed part.

3. The tail accessory (T) according to claim 2, wherein the positioning mechanism further comprises a first recess provided at the first radial end face (F1) and a fourth projection provided at the fourth radial end face (F4),

wherein the first recess and the fourth projection are configured to be inserted into the first recess when the first half (P1) is spliced with the second half (P2) to form the tail accessory body.

4. The tail accessory (T) according to claim 3, wherein said positioning means further comprise a second projection provided at a second radial end face (F2) of said first half (P1) and a third recess provided at a third radial end face (F3) of said second half (P2),

wherein when the first half (P1) and the second half (P2) are spliced to form the tailpiece body, the second radial end face (F2) abuts the third radial end face (F3) and the second protrusion is inserted into the third recess.

5. The tail accessory (T) as claimed in claim 4, wherein said positioning mechanism further comprises a second recess provided at said second radial end face (F2) and a third projection provided at said third radial end face (F3),

wherein the second recess and the third projection are configured to be inserted into the second recess when the first half (P1) is spliced with the second half (P2) to form the tail accessory body.

6. The tail accessory (T) according to any of claims 1 to 5, wherein the tail accessory body has a first end (S1) and a second end (S2), and the tail accessory body has a first receiving recess and a second receiving recess, wherein the first receiving recess is arranged close to the first end (S1) and the second receiving recess is arranged close to the second end (S2) for receiving the metal clip (R).