WO2014068086A1

WO2014068086A1 - Device for retaining an attachment part on a carrier

Info

Publication number: WO2014068086A1
Application number: PCT/EP2013/072866
Authority: WO
Inventors: Detlef Grundmann; Dietmar Kahrens
Original assignee: Volkswagen Aktiengesellschaft
Priority date: 2012-11-02
Filing date: 2013-11-01
Publication date: 2014-05-08
Also published as: DE112013005245A5

Abstract

The invention relates to a device for retaining an attachment part (29) on a carrier (38) with the aid of a fastening element which has a plug-in part (22), which is pluggable into a latching channel (30) in the attachment part (29), and a shaft-shaped plunging clamp (1), wherein the plug-in part (22) is fixed in a first latching position (R1) in the latching channel (30) of the attachment part (29) in an assembly position (I) and is fixed in a second latching position (R2) in the latching channel (30) of the attachment part (29) in an extraction position (II), and in order to remove the attachment part (29) from the carrier (38) when the attachment part (29) is returned to the assembly position (I), an engagement between the plug-in part (22) located in the second latching position (R2) and the plunging clamp (1) is releasable, said plunging clamp (1) having two opposite clamp legs (2) which engage behind a mounting opening (39) in the carrier (38). The clamp legs (2) of the shaft-shaped plunging clamp (1) are connected together at least partially by a transverse wall (29) at their longitudinal edges (28) that extend along the shaft axis (A).

Description

description

Device for holding an attachment to a carrier

The invention relates to a device for holding an attachment to a carrier by means of a fastener according to the preamble of claim 1 and a

Fastening element according to claim 12.

From DE 10 2010 035 012 A1 a generic device for holding an attachment to a carrier is known. Accordingly, the device is used in a head airbag assembly in a vehicle. The head airbag is arranged behind a visible attachment. The attachment is in turn using a special

Fastener mounted on a body-mounted carrier. Upon triggering the

Head airbags, the attachment to a predetermined displacement path in the

Vehicle interior displaced into it, whereby an opening gap is released, through which the head airbag exits into the vehicle interior. The fastener that the

Attachment connects to the carrier, is made in two parts and has a, insertable into a detent channel of the attachment insert and a shaft-shaped immersion clamp on. The male part of the fastening element is fixed in an assembly position in a first detent position in the detent channel of the fixture. In an extract position, that is, after triggering the head airbag with appropriate force, the male of the fastener is set in a second detent position in the detent channel of the attachment. To realize a disassembly function of the attachment from the carrier, the attachment can be reset from the extension position back to the assembly position. As a result, an engagement between the located in the second detent position plug and the immersion clamp is released. The immersion clamp is a sheet metal part with two

opposite clip legs, which engages behind a mounting opening of the body-mounted carrier.

The object of the invention is to provide an improved device of the generic type, in which the above-described operation of the fastener is met reliably in a simple manner.

The object is solved by the features of claim 1 or claim 12. Preferred embodiments of the invention are disclosed in the subclaims. According to the characterizing part of claim 1, the staple legs of the shaft-shaped immersion clamp are connected to each other at their, along the shaft axis extending longitudinal edges at least partially via a transverse wall, whereby the

Torsional stiffness of the shaft-shaped immersion clamp of the fastener is substantially increased in a simple manner.

The dip-in clip may have a stem leg opposite the plug-in part, which is guided in the assembly position through the carrier-mounting opening. In order to provide sufficient elasticity directly on the shaft foot, it is advantageous if the

Transverse wall is spaced by a predetermined longitudinal offset from the frontal Schaftfuß. To further increase the elasticity directly on the frontal shaft foot of the

Immersion clip can complete the two clip legs on the shaft base with free edges. The free edges are opposite each other with free space.

The transverse wall can preferably be formed on the fastening element in such a way that the transverse wall protrudes through the carrier mounting opening both in the assembly position and in the extension position.

In the assembly position, the male part of the fastening element can be supported in the first detent position on at least one locking rib in the detent channel. The male part can then be transferred to a force application, for example by a head airbag deployment, overcoming this locking rib in the second detent position. Preferably, the male member may be a U-shaped sheet metal profile part, which is supported on the transition edges from the bottom to the side walls on the locking ribs of the locking channel of the attachment. In the bottom of the U-shaped insertion part can also be formed a passage opening through which the ends of the staple legs of the immersion clamp are guided and brought into latching engagement with the side walls of the U-shaped profile part. This locking engagement can in the above-mentioned re-provision of the attachment of the extract position in the

Assembly position can be solved, whereby the attachment is easily disassembled.

Preferably, the opening edge of the passage opening with a predetermined distance in front of the transition edges in the bottom of the U-shaped profile part complete. In this way, the transition edges of the U-shaped profile part continuously, whereby a much larger compared to the prior art support base of the male takes place on the two locking ribs. On the two clip legs of the immersion clamp can also be formed elastically resilient latching arms. These can be formed in the region of the shaft base and be formed with locking edges, which engage behind the carrier mounting opening. It is particularly preferred if the latching edges of the latching arms are additionally extended on their side facing away from the shaft base with movement stops. In the assembly position, the elastically resilient latching arms of the clip legs on the

Support movement stops directly on corresponding abutment surfaces of the attachment.

The advantageous embodiments and / or further developments of the invention explained above and / or reproduced in the dependent claims can be used individually or else in any desired combination with one another, for example in the case of clear dependencies or incompatible alternatives.

The invention and its advantageous embodiments and / or developments and their advantages will be explained in more detail with reference to drawings.

Show it:

Figure 1 is a perspective view of a two-part fastener with a dip-in clip and a plug-in part engaged therewith.

FIG. 2 shows the insertion part of the two-part fastening element in isolation; FIG.

3 is a sectional view of the device according to the invention in an assembly position;

Fig. 4 is a view corresponding to Figure 3, the device in an extract position. and

Fig. 5 in a view corresponding to FIG. 3, the device during a

Disassembly process.

In Fig. 1, a two-part fastener with a dip clip 1 and a later-described plug 22 is shown. The immersion clamp 1 is a punched-bent part made of a metal sheet and elongated approximately in the form of a shaft along an indicated shaft axis A. The immersion clamp 1 has first and second, substantially mirror-symmetrically designed clamp legs 2, which terminate in the region of a lower shaft foot 3 at free marginal edges 4. The two free marginal edges 4 of the staple legs 2 of the immersion clip 1 are spaced apart by a free distance ai (FIG. 1). Each of the two clip legs 2 has elastically yielding latching arms 7, which are integrally formed in the region of the free marginal edges 4 of the shaft base 3. At the end remote from the shaft base 3, each latching arm 7 has a latching edge 5 with a contact section 9, which is oriented approximately horizontally in the installed position. With reference to the basic structure, the construction and the operation of the plug-in part 22 and the immersion clamp 1, reference is additionally made to DE 10 2010 035 012 A1.

At the contact portion 9 of each locking edge 5 is followed by a catch portion 10, which merges in the further course upwards in an outwardly angled movement stop 14.

On either side of each latching arm 7, each staple leg 2 is formed with first and second foot-side edge webs 1 1 extending from the free marginal edges 4 of the shaft leg 3 toward an upper head end of the immersion clip 1, in FIG

Viewed longitudinal direction of the shaft axis A. The two edge webs 1 1 merge into a full-surface center section 13 and are folded obliquely toward one another in the connection region to the middle section 13.

On the, the latching arms 7 side facing away from each central portion 13, a support tongue 16 is formed, the laterally projecting laterally obliquely laterally outward and has a support portion 17 and an inner portion 18 has. The support portion 17 engages between two on both sides of each support tongue 16 arranged head-side edge webs 19 from the outside of the respective clip leg 2 on the, the other clip leg facing inside. The middle section 13 facing away from the ends

Head-side edge webs 19 are each connected to one another via a tongue 21. The two head-side edge webs 19 of the staple legs 2 have approximately in the middle of a

Abkantstufe on, which is adjacent to the respective head 21 section of the

head-side edge webs 19 with respect to the, adjacent to the center portion 13 portion of the head-side edge webs 19 further spaced from each other.

The above-mentioned plug-in part 22 is also made as a stamped and bent part of a metal sheet and formed in approximately U-shaped profile. The U-shaped plug-in part 22 has according to FIGS. 1 and 2 substantially parallel to each other aligned side walls 23, which are connected to each other via a bottom 24. The bottom 24 comprises, as shown in Fig. 2, two loop-shaped connections 24 a, which increase the elastic mobility of the side walls 23 and the transition edges 51 of the insertion part 22 by their elasticity. In Fig. 1 is for better visibility of the overall arrangement of the two-part Fastener not shown in relation to FIG. 1 front loop-shaped connection 24a.

Between the two loop-shaped connections 24a, a passage opening 25 is provided in the bottom 24 of the U-shaped insertion part 22, through which the upper ends of the staple legs 2 of the immersion clamp 1 are guided and brought into latching engagement with the side walls 23 of the U-shaped insertion part 22. For this latching engagement 23 fixing tongues 27 are formed on each side wall, which engage under the head tongues 21 of the plug-in clip 1 (FIG. 1).

As is further apparent from FIG. 1, the two clip legs 2 are connected at their longitudinal edges 28 to a transverse wall 29 in order to increase the torsional rigidity. The

Transverse wall 29 is spaced over a longitudinal offset Δχ (Fig. 1) from the shift foot 3 in order to ensure sufficient elasticity of the shift foot 3.

In Fig. 3 is a sectional view of an attachment 29 is shown, which is mounted in an assembly position I with the interposition of a head airbag part 20 on a vehicle-mounted carrier 38. The attachment 29 has a latching channel 30 which is bounded by two mutually opposite walls 31. On the outer walls 31 bottom webs 34 are integrally formed on their side facing away from a visible side 33 of the attachment 29 end portions. These limit a latching channel mouth through which the staple legs 2 are guided. At a distance from the bottom webs 34 locking ribs 36 are integrally formed on the outer walls 31. In the assembly position I is the male part 22 of the fastener to the

Locking ribs 36 supported. The bottom webs 34 of the attachment 29, however, are supported on the movement stops 14 of the latching arms 7 of the two clip legs 2, in a first latching position R1.

In the assembly position I shown in FIG. 3, the immersion clamp 1 is inserted with its shaft foot 3 ahead through a carrier mounting recess 39 formed in the carrier part 38 until the contact sections 9 of the latching edges 5 engage behind the opening edge of the carrier mounting recess 39 and the catch portions 10 abut the inside of the mounting hole 39.

In Fig. 4, the arrangement is shown in an extract position II, in which the accessory 29 is subjected to force from the deploying head airbag by triggering the head airbag and is displaced in the direction of the vehicle interior. Due to the direction of the

Vehicle interior space acting on the attachment 29 force the locking ribs 36 are released by dodging of the plug 22 away from their engagement with the male member 22 has been and the male member 22 is now set in a second locking position R2.

Consequently, the locking ribs 36 are now arranged above the plug-in part 22 and the plug-in part 22 is supported directly on the two bottom webs 34. At the same time, in FIG. 4, the movement stops 14 of the clip legs 2 are spaced apart from the attachment 29 by a displacement path v.

The disassembly of the attachment 29 from the carrier 38 will be described with reference to FIG.

Accordingly, first the attachment 29 is pressed back into its assembly position I, with the male member 22 in its second locking position R2.

In this way, the immersion clamp 1 with the two clip legs 2 through the passage opening 25 of the plug 22 dive upwards and thereby the

Release locking engagement between the immersion clamp 1 and the plug-in part 22. Specifically, in Fig. 5, the attachment 29 is moved toward the support member 38 until the movement stops 14 now rest on the head airbag portion 40 and the locking ribs 36, the male member 22 by resting on the free top sides of the side legs 23 after overcoming a

Resistance under sliding out of the fixing tongues 27 have brought out of the head 6 of the immersion clamp 1 out of engagement with the immersion clamp. The two head tongues 21 of the staple legs 2 are now out of engagement with the fixing tongues 27 of the plug-in part 22. The two support tongues 16 are again rebounded, now in turn are based on the

Fixing tongues 27 from the outside and exert on the staple legs 2 a force with which the staple legs 2 converge. As a result, the head tongues 21 are arranged on the inside of an extension of the two fixing tongues 27 that points away from the shaft base 3. This ensures that the two head tongues 21 can not rest again on the fixing tongues 27 in the further course of disassembly, so that the removal of the attachment part 29 is ensured even with a relatively low residual stress of the clip legs 2.

As is apparent from the figures, the U-shaped plug-in part 22 with his

Transition edges 51 on the two locking ribs 36 can be supported. The opening edge 52 (Fig. 2) of the passage opening 25 is shown in FIG. 2 with a distance a _{2 in} front of these

Transition edges 51 in the bottom 24 of the U-shaped profile part 22 is formed. In this way, there are continuous transition edges 51, which are supported on the two locking ribs 36 with a larger support base compared to the prior art.

Claims

Patent claims

Device for holding an attachment (29) on a support (38) with the aid of a fastening element which is inserted into a locking channel (30) of the attachment (29).

has a plug-in plug-in part (22) and a shaft-shaped immersion clamp (1), the plug-in part (22) being in an assembly position (I) in a first

Locking position (R1) is fixed in the locking channel (30) of the attachment (29) and in a pull-out position (II) in a second locking position (R2) in the locking channel (30) of the

Attachment (29) is fixed, and for dismantling the attachment (29) from the carrier (38) when the attachment (29) is returned to the assembly position (I), an engagement between the plug-in part (R2) located in the second locking position (R2) 22) and the immersion clamp (1) is releasable, which immersion clamp (1) has two opposing clamp legs (2) which engage behind a mounting opening (39) of the carrier (38), characterized in that the clamp legs (2) of

shaft-shaped immersion clamp (1) are at least partially connected to one another via a transverse wall (29) on their longitudinal edges (28) running along the shaft axis (A).

Device according to claim 1, characterized in that the immersion clamp (1) has an end-side shaft foot (3) which is opposite the insertion part (22) and is guided through the carrier mounting opening (39), and that the transverse wall (29) has a longitudinal offset (Δχ ) is spaced from the shaft base (3).

Device according to claim 1 or 2, characterized in that the two clamp legs

(2) the immersion clamp (1 ) on the shaft base

(3) with free edges

(4) that are opposite each other with a free distance (a-ι).

Device according to one of the preceding claims, characterized in that the transverse wall (29) protrudes through the carrier mounting opening (39) together with the clamp legs (2).

5. Device according to one of the preceding claims, characterized in that the insert part (22) of the fastening element is supported in the assembly position (I) in the first locking position (R1) on at least one locking rib (36) in the locking channel (30), and that the insert part (22) is under pressure when force is applied

Overcoming the locking rib (36) can be transferred to the second locking position (R2).

6. Device according to claim 5, characterized in that the insert part (22) is a U-shaped profile part which is located on the locking ribs (51) from the bottom (24) to the side walls (23) of the U-shaped profile part ( 36) is supported.

7. Device according to claim 5 or 6, characterized in that in the bottom (24) of the U-shaped profile part, a through opening (25) is formed, through which the ends of the clamp legs (2) of the immersion clamp (1) are guided and in locking engagement with the side walls (23) of the U-shaped profile part (22).

8. The device according to claim 7, characterized in that the opening edge (52) of the through opening (25) is formed at a distance (a ₂ ) in front of the transition edges (51) in the bottom (25) of the U-shaped profile part (22).

9. Device according to one of claims 6 to 8, characterized in that the bottom (24) of the U-shaped profile part comprises at least two loop-shaped connections (24a), which, due to their elasticity, ensure the elastic mobility of the side walls (23) of the insert part (22 ) increase.

10. The device according to claim 7 in conjunction with claim 9, characterized in that the through opening (25) is arranged between the loop-shaped connections (24a) in the bottom (24) of the U-shaped insert part (22).

1 1. Device according to one of the preceding claims, characterized in that the clamp legs (2) have elastically flexible locking arms (7) which are connected in the area of the shaft base (3) and are formed with locking edges (5) which hold the carrier Reach behind the assembly opening (39), and that the locking arms (7) are extended on their side facing away from the shaft base (3) with movement stops (14), which are supported in the assembly position (I) on corresponding stop surfaces of the attachment (29). .

12. Fastening element for a device according to one of the preceding claims.