CN115467878A - Plug-in clamp and fastening system with plug-in clamp - Google Patents

Abstract

The invention relates to a plug-in clip for the elastic and clamping insertion into an opening of a first component and for holding a second component via a retaining dome, the clip having a connecting section and two legs which extend from the connecting section opposite one another on both sides of a central plane through the connecting section, the legs being elastically compressible on a sectional plane perpendicular to the central plane, the legs having an expansion section, a clamping section which is recessed towards the central plane relative to the expansion section, and side arms which extend from the clamping section away from the central plane, a retaining tab which projects from the legs towards the central plane and can be elastically bent away from the central plane, and having a sliding section which extends obliquely towards the central plane in an insertion direction and a latching section which is connected to the sliding section via a counter section and extends obliquely away from the central plane in the insertion direction. The clamp is made of plastic. The invention also relates to a fastening system with a plug-in clamp and a retaining dome.

Description

Plug-in clamp and fastening system with plug-in clamp

The invention relates to an insertion clip for elastic and clamping insertion into a preferably rectangular or square opening of a first component and holding of a second component via a holding dome which extends from the second component and can be inserted into an interior space of the insertion clip inserted into the first component in order to be held by the insertion clip, according to the preamble of the independent claim; and also to a fastening system with such a plug-in clamp.

Insertion clamps of the type mentioned at the outset are known in the art. Fig. 5 shows an insertion jig 500 known to the inventors of the present application, which is made of metal (more precisely of a metal strip) in, inter alia, a plurality of bending and stamping steps, and fig. 6 shows this insertion jig 500 being used in an opening E of a first component a to hold a second component B. The first component a may be, for example, a dashboard or a body sheet metal of a motor vehicle, and the first component B may be, for example, a decorative element. The conventional plug-in clip 500 has a connecting part 1 and two elastically compressible legs 2 with an expansion part 3, a clamping part 4 which is recessed via a latching edge 8 and a transition part 9, and laterally projecting side arms 5. The retaining tabs 6 each extend from the leg 2 into the interior 7 of the plug-in clamp 500 toward the center plane yz and can be elastically bent away from the center plane yz.

Such a plug-in clamp 500 according to the prior art is designed with its flat side arms 5 for a defined material thickness of the first component a and has only minor tolerances in relation thereto. It is relatively difficult to remove the plug-in clamp 500 from the opening E, since the side arms 5 have relatively thin edges 14 which are difficult to grasp with the hand or a tool such as pliers and at the same time are relatively rigid in themselves in the event of external pressure. If the leg 2 is pressed via the edge 14, it is possible that the edge 14 of the side arm 5, when reaching the edge R of the opening E of the assembly side C of the first component a, will come out of the grip of the hand or tool and the plug-in clamp 500 will fall into the opening E. In some cases, the plug-in clip may disappear completely on the rear side D of the first component a. Further, the insertion jig 500 has a width measured in the width direction y, which substantially corresponds to the size of the opening E, which may be necessary according to the design of the holding force, but may make it difficult to initially insert the connecting portion 1 as the insertion end portion into the opening E. In order to form the retaining sheet 6, it is also necessary to die cut 51 the expansion portion 3 and the grip portion 4. The width of the retaining tab 6 is therefore relatively small, which provides only a small retaining surface for the thickened portion J of the retaining dome H. For the same reason, the transition portion 9 of each leg 2 of the insertion clip 500 has only a small width, so that the contact surface with the rear side D of the first component a is also small. Furthermore, the connecting part 1 has an obtuse-angled end face 61 with a certain transverse extent in the transverse direction x and also extends over the uniform overall width of the insertion clip 500 in the width direction y. This may result in a smaller expansion angle of the leg 2, an increased bending stiffness there and a difficulty in squeezing. Furthermore, due to the open shape structure of the insertion jig 500, it may also occur that: when multiple clips 500 are delivered and/or stored and/or provided as bulk units, the clips hook into each other, which may result in a delay in assembly thereby. Thus making automatic supply difficult. Furthermore, a clamp 500 made of metal may in principle have disadvantages such as vibration noise or material wear on the components.

Starting from the prior art described above, it is an object of the present invention to provide a plug-in clamp and a fastening system of the type mentioned in the opening paragraph, which are improved with respect to the problems described.

This object is at least in sub-aspects achieved by the features of the independent claims. Advantageous developments and preferred embodiments are described in the dependent claims.

According to one aspect of the invention, a plug-in clamp is provided for elastic and clamping insertion into a preferably rectangular or square opening of a first component and holding a second component via a holding dome which extends from the second component and can be inserted into an interior space of the plug-in clamp inserted at the first component in order to be held by the plug-in clamp, having a connecting portion and two legs which extend opposite one another from the connecting portion on both sides of a central plane through the connecting portion. The legs are resiliently compressible in a sectional plane perpendicular to the central plane. Each of these legs has, in order from the connecting portion towards the free end, a flared portion, a clamping portion, which is recessed relative to the flared portion towards the central plane, at least when seen from the outside, and side arms, which extend from the clamping portion away from the central plane. A retention tab extends from each leg toward the central plane and is resiliently bendable away from the central plane. The retaining tab has a sliding portion which extends obliquely in the insertion direction of the plug-in clip towards the central plane, and a latching portion which is connected to the sliding portion via a counter portion and extends obliquely in the insertion direction away from the central plane. The plug-in clamp is made of plastic.

This aspect makes it possible to achieve a more freely shaped construction of the insertion clip with regard to local optimization of the material thickness, for example with regard to rigidity and weight. On the other hand, features can also be realized which have additional advantages and can be implemented in further embodiments and can be produced easily by stamping and bending.

In an embodiment, the side arm of each leg may have a cantilever portion extending at right angles or substantially at right angles from the clamping portion and an end portion connected to the cantilever portion at an end of the cantilever portion remote from the clamping portion and being concave or angled with respect to the cantilever portion as viewed from the clamping portion. Such a design of the side arms may increase the flexibility of the side arms, improve tolerance compensation and reduce assembly forces. The length and radius of curvature or angular degree of angulation of the end portions can be designed based on the degree of tolerance compensation and flexibility or assembly force required. In particular, the end portion may form an angle of at least 110 °, preferably at least 125 °, and/or at most 160 °, preferably at most 145 °, with the cantilever portion, among others. A steeper angle would in principle increase the degree of tolerance compensation possible, and a flatter angle would tend to reduce the assembly force, all other things remaining equal.

In embodiments, the end portion may decrease in wall thickness towards the edge, which may increase flexibility of the end portion, improve tolerance compensation and reduce assembly forces.

In an embodiment, the side arms can have a length which is greater than the clear width between the retaining pieces in the relaxed state of the retaining pieces, preferably greater than the clear width between the retaining pieces in the state of the retaining pieces being bent maximally away from the central plane, particularly preferably greater than the clear width between the clamping sections. It is also thereby possible to prevent the insertion jig from falling into the opening when it is slid off the grip of the hand or tool during assembly or disassembly.

In an embodiment, the connecting portion may be designed in the shape of a circular arc and continue to the leg. Whereby the legs can be made sharper. This may also facilitate centering of the insertion jig at the opening and make the insertion jig more flexible.

In an embodiment, the expansion portion may decrease in width, measured in a direction perpendicular to the cross-sectional plane, from the clamping portion towards the connection portion. This may also facilitate centering of the insertion jig at the opening and make the insertion jig more flexible.

In an embodiment, the retention tabs can extend across the overall width of the insertion clip measured in a direction perpendicular to the cross-sectional plane and at the location where each retention tab extends from a leg. This also increases the bearing surface of the retaining tab.

In an embodiment, the retaining tabs can be provided respectively at the outer ends of the clamping portions opposite to the insertion direction. This makes it possible to reduce the angle of attack of the retaining tab and to facilitate the insertion of the retaining dome with the same insertion depth of the insertion clip in the insertion direction. Alternatively, the holding pieces can be provided in the grip portions rearward from the outer end portions, respectively. This may improve the holding force of the holding crown due to the steeper angle of attack relative to the centre plane.

In an embodiment, at least one inner limb can be provided, which extends transversely or substantially transversely from the end of one of the legs remote from the connecting portion at its outer edge in the width direction towards the center plane, and preferably beyond the center plane, wherein the inner limb has a width which is small compared to the total width of the insertion clip, preferably a maximum of one third of the total width, particularly preferably a maximum of one sixth of the total width. Thereby preventing the plurality of clamps from hooking each other when loosely dumped. This may facilitate manual feeding as well as automatic feeding of the insertion jig. In the case of a plurality of inner arms, these can provide a guide of the plug-in clamp in the width direction for the retaining dome of the second component to be fastened.

Another aspect of the invention relates to a fastening system having: an insertion clip according to any of the preceding claims, which is inserted or can be inserted into an opening of the first component; and a retaining cap attached to or formed on the second member. The retaining dome has a preferably cubic base and a thickening on the end side, which is designed to: at its end remote from the component, is inserted between the retaining tabs of the insertion clip by pressing the retaining tabs outwards until the retaining tabs spring back again in the position in which the retaining cap is fully inserted; and at its component-side end, abuts a complementarily designed latching portion of the retaining disk.

Further objects, features and advantages of the present invention result from an observation of exemplary embodiments, which are described in the following with the help of the figures.

FIG. 1A is a perspective view of an insertion fixture according to one embodiment of the present invention.

Fig. 1B-1E are side, bottom, front, and top views of the insertion clip of fig. 1A.

Fig. 2A and 2B are front and perspective views of a fastening system having the insertion clip of fig. 1A-1E and a second member retained at the insertion clip, according to another embodiment of the invention.

Fig. 2C is a perspective view of the fastening system of fig. 2A and 2B, having a first member receiving an insertion clip and a second member fastened at the first member by means of the fastening system.

Fig. 3A is a perspective view of an insertion fixture according to another embodiment of the present invention.

Fig. 3B-3E are side, bottom, front, and top views of the insertion clip of fig. 3A.

Figure 3F is a perspective view of an insertion clip according to another embodiment of the present invention.

Figure 3G is a front view of an insertion fixture according to another embodiment of the present invention.

Fig. 4A and 4B are front and perspective views of a fastening system having the insertion clip of fig. 3A-3E and a second member retained at the insertion clip according to another embodiment of the invention.

Fig. 5 is a perspective view of an insertion jig according to the prior art.

FIG. 6 is a front view of a fastening system according to the prior art having the insertion clip of FIG. 5, a first member receiving the insertion clip, and a second member retained at the insertion clip.

An insertion jig 100, 300',300 ″ according to the invention will now be described with the aid of fig. 1A to 4B. Here, an insertion jig 100 is illustrated in fig. 1A to 2C as a basic embodiment, an insertion jig 300 is illustrated in fig. 3A to 3E as another embodiment, an insertion jig 300' is illustrated in fig. 3F as another embodiment, and an insertion jig 300 ″ is illustrated in fig. 3G as another embodiment. The fastening system 200 according to fig. 2A to 2C and the fastening system 400 according to fig. 4a and 4B are likewise of the invention

Examples

The insertion jig 100, 300',300 ″ according to the invention is intended to be inserted resiliently and clampingly into a preferably rectangular or square opening E of a first component a and to hold a second component B via a holding dome H which extends from the second component B and can be inserted into the interior space 7 of the insertion jig 100, 300',300 ″ inserted at the first component a in order to be held by the insertion jig (fig. 2C). The first member a may be, for example, an instrument panel or a body metal plate of a motor vehicle, and the first member B may be, for example, a decorative element, although the present invention is not limited thereto. The retaining dome H may be an integral part of the second member B or attached to or connected with the second member.

Insertion clip 100, 300',300 "has a connecting portion 1, which forms the insertion end of insertion clip 100, 300',300", and two legs 2 (fig. 1A to 4B). For simplicity of description, axes x, y, z are defined at insertion clip 100, 300',300 ″. Here, axis z defines the insertion direction of insertion clip 100, 300',300", axis y defines the width direction of insertion clip 100, 300',300", and axis x defines the transverse direction of insertion clip 100, 300',300 ". The origin of the coordinate system thus formed is marked by the center point of the outer surface or line of the connecting portion 1 in the insertion direction z. The plane xz is defined as a sectional plane and the plane yz is defined as a central plane. The central plane yz passes through the connecting portion 1. The sectional plane xz is perpendicular to the central plane yz and passes through the connecting portion 1 and the leg 2.

The legs 2 extend from the connecting portion 1 opposite to each other opposite to the insertion direction z on both sides of the center plane yz. The legs 2 are elastically compressible in the sectional plane xz. Each of the legs 2 has, in order from the connecting portion 1 towards the free end, a flared portion 3, a clamping portion 4, which is concave from the flared portion towards the central plane yz, at least when seen from the outside, and a side arm 5, which extends from the clamping portion 4 away from the central plane yz. A retaining tab 6 extends from each leg 2 towards the central plane yz. The retaining piece 6 is elastically bendable away from the center plane and has a sliding portion 11 and a latching portion 12, the sliding portion 11 extending obliquely in the insertion direction z towards the center plane yz, the latching portion 12 extending obliquely behind a counter portion 13 in the insertion direction z away from the center plane yz. At the transition of the expansion part 3 to the clamping part 4, a latching edge 8 can be formed, from which a transition part 9 extends inward toward the center plane yz. The clamping portion 4 then extends from the transition portion 9 counter to the insertion direction z.

The flared portions 3 of the legs 2 have a flare angle a relative to each other. The space defined by the connecting portion 1 and the leg 2 is the inner space 7 of the plug-in clamp 100, 300',300 ". The inner space 7 is open at the end opposite to the insertion direction z and there forms a mouth 10 into which a retaining dome E can be inserted (fig. 2A, 2B, 2C, 4A, 4B).

In contrast to conventional insertion clamps (fig. 5 and 6), the insertion clamp is made of plastic. This aspect may enable a more freely shaped structure of the insertion jig 100, 300',300 ″ in terms of local optimization of the material thickness (e.g., in terms of stiffness and weight). On the other hand features with additional advantages can also be realized. For example, it is no longer necessary to form the window in the leg 2 by stamping the retaining tab 6. Instead, the retaining tabs 6 can extend over the entire width of the leg 2, which in particular increases the support surface for the retaining dome H and enables a matching with the wall thickness in terms of bending stiffness. The retaining tab 6 can be arranged directly at the lowermost end of the plug-in clamp 100, 300' or the clamping portion 4, that is to say in the region of the mouth 10, which enables a smaller angle of attack C of the sliding portion 11, so that the insertion of the retaining crown H can be facilitated (fig. 1A, 1D, 2A to 2C, 3A, 3D, 3F, 4A). In a variant, the retaining tab 6 can be arranged at a distance from the plug-in clamp 300 ″ or the lowermost end of the clamping section 4, in particular in the region of the clamping section 4, which enables a larger angle of attack c of the sliding section 11, thus enabling an increase in the retaining force at the retaining dome H. Here, the retaining tabs 6 may extend over the entire width of the side arms 2, in contrast to conventional insertion clips (fig. 5, 6) in which the width of the retaining tabs 6 is limited by the die cut in the side arms 2. This also improves the holding reliability due to the wider support surface.

The insertion clip 100, 300',300 ″ can have a further advantageous embodiment. For example, the legs 2 can meet in the connecting portion 1, so that the connecting portion 1 is reduced to an insertion nose with a relatively small rounding radius. Furthermore, the width b in the lower region of the insertion clip 100, 300',300 ″ can be reduced to the smaller width b of the connecting part ₁ . Both of these can facilitate assembly, in particular the initial centering of 100, 300',300 "in the opening E of the first component (fig. 2C), and can also increase the flexibility of 100, 300',300" and thus reduce assembly forces.

The side arms 5 can each have a cantilever portion 15 and an end portion 16, the cantilever portion 15 being connected with the holding portion 4 and the end portion 16 being connected with the cantilever portion 15. The cantilevered portion 15 may extend outwardly from the clamping portion 4 at a right angle or at a substantially right angle. The end portion 16 may be curved or angled in the insertion direction z relative to the cantilever portion 15. Depending on the length and the degree of bending or the angular angle f of the end portion 16, the flexibility of the side arm 5 and the extension in the insertion direction z can be set. The extent in the insertion direction z defines the tolerance compensation capability in the thickness direction of the first component a or also enables different component thicknesses t _A Diversity of aspects (see fig. 2C). Alternatively, the side arms 5 may also be curved as a whole in the insertion direction, or inclined at a more acute angle toward the holding portion 4. The end portion 16 may be tapered towards the edge 14 to increase flexibility.

The side arms 2 can have reinforcing ribs 31 (fig. 3G), in particular in the region of the expansion section 3, which extend in the transverse direction y. These stiffening ribs can increase the stiffness of the expansion part 3 and thus the bending strength when inserting the plug-in clamp 300".

In the transition 9 from the expansion part 3 to the holding part 4, on the other side relative to the latching edge 8, the side arm 2 can have a recess 32 (fig. 3G). These grooves can reduce the bending stiffness in this region and ensure that the clamping portion 4 can bear against the inner wall P of the opening E in the first component a under the pressure of the retaining tab 6 against the retaining roof H and under the tension of the expansion arm 3.

The retaining tab 6 can have a thickening in the reversal section 13 between the sliding section 11 and the latching section 14, which thickening can also be embodied in the form of reinforcing ribs 33 (fig. 3G).

Furthermore, an inner arm 30 can be provided, which inner arm 30 extends transversely from the leg 2 in the direction of the central axis yz in the region of the open end or mouth 10 of the insertion- type clamp 300, 300',300 ″, and possibly beyond this central axis (fig. 3A to 3G). The inner arm 30 can thus be connected to the outer edge of the clamping portion 4 of the plug-in clamp 300, 300',300 ″ viewed in the direction of the width direction y or opposite to this and opposite to the insertion direction z. Such an inner arm 30 is able to delimit the inner space 7 of the insertion clip 300, 300',300 "with respect to the outside and prevent a plurality of insertion clips 300, 300',300" from hooking each other when loosely packed in bulk. In principle, it is sufficient if only one inner arm 30 is provided on one of the legs 2 of the insertion clip 300' (fig. 3F). Depending on the total width b, it may be advantageous to have two inner arms 30 arranged at opposite edges of the insertion clip 300 in the width direction y (fig. 3A). It can be advantageous here for the inner arms to be attached to the end portions of the clamping portion 4 which are arranged diagonally to one another. Alternatively, the two inner arms 30 can also be arranged at opposite edges in the width direction y of the same clamping section 4 of the plug-in clamp 300 (not shown in detail). In a variant embodiment, inner arms 30 can also be provided which are arranged at the ends of the two clamping parts 4 which are opposite one another in the transverse direction x. Such laterally opposite inner arms 30 then do not need to extend beyond the central plane yz. The inner arm 30 may also define the position of the retaining roof H of the second member B in the width direction y of the insertion clip 300 (fig. 4B). Thus, the position of the holding crown H can be defined in all directions by the insertion jig 300 itself. This can also be advantageous if the second component B is transported together with the plug-in clamp 300. In alternative embodiments, the inner arms 30 or the inner arm 30 may break or bend aside upon insertion of the retaining cap H. The width of the inner arm 30 may be adapted to the application or desired behavior. In principle, as much space as possible should also be left for the retaining dome H, so that the width of the inner limb 30 should be as small as possible, for example, preferably at most one third, particularly preferably at most one sixth, of the total width of the plug-in clamp compared to the total width.

The assembly process of fastening system 200, 400 with insertion jig 100, 300',300 ″ will now be explained (fig. 2A, 2B, 2C, 4A, 4B).

The first member a has a mounting side C and a rear side D and an opening E (fig. 2C) formed between the mounting side C and the rear side D. The second member B has a visible side E and a fastening side F opposite the visible side. Extending from the fastening side F are retaining domes H (only one is shown) with a stem I extending from the fastening side F of the second member B, and a thickened portion J. The shaft I is designed substantially cuboidal or strip-like or blade-like. The thickened portion J is designed symmetrically in the transverse direction x and has on both sides of a central plane yz an engagement face K, the thickness of which increases as seen from the shaft portion I, and a sliding face L, the thickness of which decreases again. The retaining tip H may have a shoulder M at the end of the thickened portion J. A spacer N (shown in fig. 6 for the prior art) can be provided, in particular in larger, planar components, on the mounting side C of the first component a or on the fastening side G of the second component B in order to ensure the distance between the components a, B. In larger components, a plurality of openings E and a corresponding number of insertion clamps 100, 300',300 ″ and retaining domes H are also usually provided. Here, a second member in the form of a disc of smaller dimensions is shown.

To insert insertion clip 100, 300',300 ″ at first component a, insertion clip 100, 300',300 ″ is grasped by side arms 5 and inserted with connecting part 1 into opening E of first component a. By the expansion part 3 abutting against the edge R of the opening E and, if necessary, actively by an assembly worker or an installation tool, the leg 2 is pressed and the plug-in clamp 100, 300',300 ″ is pushed further into the opening EUntil the latching edge 8 of the transition portion 9 reaches the edge O of the rear side of the opening E and the transition portion 9 abuts against the rear side D of the first component a under the elastic resilience of the leg 2. The expansion path of the leg 2 is limited here by the abutment of the clamping portion 4 against the inner wall P of the opening E. In the end position of the insertion clip 100, 300',300 ″ or earlier, the side arm 5 also bears at least with the outer edge 14 of the end section 16 against the mounting side C of the first component a. Here, the member thickness t with respect to the first member is obtained due to the concave shape and length of the side arm 5 _A And higher tolerances in the component spacing d. The tapering of the end portions 16 of the side arms 5 in terms of wall thickness may also increase the flexibility of the side arms and reduce the assembly forces. In the extreme case, the side arm 5 can bear flat against the mounting side C of the first component a. As can be seen in the figures, the width with respect to the opening E can be designed such that the clamping portions 4 of the legs 2 extend parallel in the inserted state and the transition portions 9 each extend at right angles to the connecting clamping portion 4. Thereby, the clamping portion 4 can be reliably and flatly applied against the inner wall P of the opening E, and the transition portion 9 can be reliably and flatly applied against the rear side D of the first component a. The length l (see fig. 1D) of the side arms 5 can be adapted to the width of the opening E such that each side arm still abuts the mounting side D when the leg 2 is pressed, so that the insertion clip 100, 300',300 ″ does not disappear into the opening E. In this case, the space requirement of the retaining webs 6 can also be taken into account in this connection, wherein as a comparative measure of the length l of the side arms 5, the clear width w between the retaining webs 6 in the relaxed state of the retaining webs or in the bent state of the retaining webs furthest away from the center plane, or the clear width between the clamping sections 4, or the nominal width of the opening E can be taken into account.

In the plug-in clamp 100, 300',300 ″ inserted and latched in the opening E, the second component B is now fastened to the first component a in such a way that: the retaining dome H is inserted into the interior space 7 of the insertion jig 100, 300',300 ″ formed between the legs 2 via the mouth 10 (fig. 2A, 2B, 4A, 4B, without showing the first member a). During insertion, the retaining dome H presses against the retaining tab 6 of the insertion clip 100, 300',300 ″ and engages behind the retaining tab in the final position. More precisely, when the retaining dome H is inserted, if necessary, after centering (or centering) between the retaining tabs 6 by means of the shoulder M, the sliding surfaces L on both sides of the thickened portion J touch the corresponding sliding portions 11 of the retaining tabs 6. Upon further insertion, the thickening J expands the retaining disk 6 outwards (i.e. away from the center plane yz) until the transition surface Q between the sliding surface L of the thickening H and the detent surface K passes the counter-portion 13 of the retaining disk 6. Subsequently, the retaining strip 6 springs back elastically toward the center plane yz, so that the detent face L of the thickened portion J of the retaining dome H abuts against the detent portion 12 of the retaining strip 6 of the plug-in clip 100, 300',300 ″. The retaining dome H is thus held between the retaining tabs 6 of the plug-in clamps 100, 300',300 ″.

When the insertion clip 300, 300',300 "has inner arms 30, the retaining crown H may be centered and retained between the inner arms 30 (fig. 4A, 4B).

For the purpose of disassembly, the second component B can be removed first by pulling the retaining dome H out of the interior 7 of the insertion clip 100, 300',300 ″. If this is done, the retaining dome H pushes the retaining piece 6 outwards in such a way that the engagement surface K presses against the latching portion 12 and the retaining piece 6 is thereby bent. The angle of the latching portion 12 and/or the latching surface K determines the removal force and can be designed accordingly. After the second component has been removed, the legs 2 of the insertion-type clamps 100, 300',300 ″ are grasped at the side arms 5 (more precisely at the end portions 16 of the side arms 5) and squeezed. Here, the elasticity, shape structure and length of the end portion 16 are such that gripping by a tool or the hand of an assembly worker is facilitated. Although the edges 14 of the end portions 16 may be thinner, the end portions 16 may fold under lateral pressure, which may increase the grip area and make the grip more reliable. With a corresponding design of the length l of the side arm 5, it is also possible to ensure that: in spite of the release from the grip, a portion of the side arm 5 still abuts against the mounting face C of the first component a. This can prevent the insertion clip 100, 300',300 ″ from sliding down into the opening E and having to be removed again with great effort or even disappear into the opening E.

Each embodiment of an insertion clip 100, 300',300 "can be considered a modification or variation of any other embodiment of an insertion clip 100, 300',300", and thus each embodiment can utilize the described or illustrated features of any other embodiment, as long as it can be implemented without contradiction. For example, the plug-in clamp 300 ″ according to fig. 3G has reinforcing ribs 31, 33 and two inner arms 30. However, stiffening ribs 31, 33 may also be applied to each of the insertion clamps 100, 300' of the other embodiments, or insertion clamp 300 "of fig. 3G may have only one inner arm 30 as in the embodiment of fig. 3F.

The invention is only limited by the features of the claims. The description and drawings merely show examples of embodiments. An embodiment of the invention need not have all of the features of an embodiment. Rather, even if an individual feature of the embodiment is omitted, the embodiment is within the scope of protection of the claims as long as it realizes the feature of the corresponding claim.

List of reference numerals

1. Connecting part

2. Supporting leg

3. Expansion part

4. Clamping part

5. Side arm

6. Holding sheet

7. Inner space

8. Latch edge

9. Transition section

10. Mouth part

11. Sliding part

12. Latch part

13. Reversing section

14. Free end

15. Cantilever part

16. End part

30. Inner arm

31. Reinforcing rib

32. Groove

33. Reinforcing rib

51. Punching

61. End face

100. Plug-in type clamp

200. Fastening system

300. Plug-in type clamp

300' insertion type clamp

300' insertion type clamp

400. Fastening system

500. Plug-in clamp (prior art)

600. Fastening system (prior art)

A first Member

B second Member

C Assembly side (front side)

D rear side

E opening

F visible side (front side)

G fastening side (rear side)

H keeps the top

I rod part

J-shaped thickened part

K engaging surface

L sliding surface

M convex shoulder

N-pitch keeper

O rear edge

P inner wall

Transition surface of Q

R outer edge

a angle of expansion

b width

Angle of attack c

distance between d members

e locking angle

f angle of angulation

length l of

t wall thickness)

w net width

x transverse direction

y width direction

z direction of insertion

xz sectional plane

yz center plane

* ) The index can represent the element to which the measured value relates.

Claims (10)

1. An insertion jig (100, 300, 300 ') for resilient and clampingly inserting into a preferably rectangular or square opening (E) of a first member (A) and holding a second member (B) via a holding crown (H) extending from the second member (B) and being insertable into an interior space (7) of the insertion jig (100, 300, 300') inserted at the first member (A) so as to be held by the insertion jig,

wherein the plug-in clip (100, 300, 300') has a connecting portion (1) and two legs (2) extending from the connecting portion opposite to each other on both sides of a central plane (yz) through the connecting portion (1),

wherein the legs (2) are elastically compressible in a sectional plane (xz) perpendicular to the central plane (yz),

wherein each of the legs (2) has, in order from the connecting portion (1) towards a free end (14), a flared portion (3), a clamping portion (4) which is recessed towards the central plane (yz) relative to the flared portion (3) at least when seen from the outside, and a side arm (5) which extends from the clamping portion (4) away from the central plane (yz),

wherein a retaining flap (6) extends from each leg (2) towards the center plane (yz) and is elastically bendable away from the center plane (yz), wherein the retaining flap (6) has a sliding section (11) which extends obliquely towards the center plane (yz) in an insertion direction (z) of the plug-in clamp (100, 300, 300',300 ") and a latching section (12) which is connected to the sliding section (11) via a counter section (13) and extends obliquely away from the center plane (yz) in the insertion direction (z),

wherein the insertion clip (100, 300, 300',300 ") is made of plastic.

2. The plug-in clip (100, 300, 300',300 ") as claimed in claim 1, wherein the side arm (5) has a cantilever section (15) which extends at right angles or substantially at right angles from the clamping section (4) and an end section (16) which is connected to the cantilever section (15) at its end remote from the clamping section (4) and which, viewed from the clamping section (4), is angled or concave with respect to the cantilever section (15), wherein the end section (16) forms in particular an angle of at least 110 °, preferably at least 125 °, and/or at most 160 °, preferably at most 145 °, with the cantilever section (15).

3. The insertion clip (100, 300, 300',300 ") of claim 2, wherein the end portion (16) decreases in wall thickness towards the edge.

4. The insertion clip (100, 300, 300',300 ") according to one of the preceding claims, wherein the side arms (5) have a length (l) which is greater than a net width (w) between the retaining tabs (6) in their relaxed state, preferably greater than a net width (w) between the retaining tabs (6) in their state of maximum bending away from the central plane (yz), particularly preferably greater than a net width between the gripping portions (4) of the legs (2).

5. The plug-in clip (100, 300, 300',300 ") according to one of the preceding claims, wherein the connecting portion (1) is designed in the shape of a circular arc.

6. The insertion clip (100, 300, 300',300 ") according to one of the preceding claims, wherein the width (b, b) of the expansion part (3) measured in a direction perpendicular to the section plane (xz) is such that it is not in contact with the expansion part ₁ ) The aspect decreases from the clamping portion (4) towards the connecting portion (1).

7. The insertion clip (100, 300, 300',300 ") according to one of the preceding claims, wherein the retaining tab (6) extends over an overall width (b) of the insertion clip (100, 300, 300', 300"), measured in a direction perpendicular to the section plane (xz) and at a location where the retainer extends from the leg (2).

8. The plug-in clamp (100, 300, 300',300 ") as claimed in one of the preceding claims, wherein the retaining tabs (6) are each arranged at an outer end of the clamping part (4) opposite the insertion direction (z) or are arranged within the clamping part (4) from the outer end back.

9. The insertion clip (100, 300, 300',300 ") according to one of the preceding claims, wherein at least one inner limb (30) is provided which projects from an end of one of the legs (2) remote from the connecting portion (1) at its outer edge in the width direction (y) and extends transversely or substantially transversely towards the center plane (yz) and preferably beyond the center plane (yz), wherein the inner limb (30) has a width which is smaller compared to the total width (b) of the insertion clip (100, 300, 300', 300"), the inner limb (30) having a width which is preferably at most a third of the total width, particularly preferably at most a sixth of the total width.

10. A fastening system (200, 400) having: the insertion jig (100, 300, 300',300 ") of any one of the preceding claims inserted or insertable into an opening (E) of a first member (a); and a retaining dome (H) which is connected to or formed on the second component (B), wherein the retaining dome (H) has a preferably cubic base or shank (I) and an end-side thickening (J),

wherein the thickened portion is designed such that: at its end remote from the component, is inserted between the retaining tabs (6) of the insertion clip (100, 300, 300',300 ") by pressing the retaining tabs (6) until the retaining tabs (6) spring back again in the position in which the retaining dome (H) is fully inserted; and at its component-side end, a complementary latching section (12) of the retaining plate (6) rests.

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