EP0984120A1 - Connection assembly - Google Patents

Abstract

On the plastic connecting part (11) the plastic cap (47) can be secured, forming a plastic - plastic contact. For this securement, at least one securing projection (51) and back cut (19) are provided. The back cut for spring-back formation is formed on a longitudinal extension, the longitudinal direction of which extends crossways to an engagement direction, along which the securing projection grips in the back cut.

Description

The invention relates to a connection arrangement with a metal base body and a cap for covering the metal base body.

Such connection arrangements are used in building fittings as well as in the sanitary area. The metal base body can have a mounting surface, for example a door, to be connected there as Basis for further superstructures or attachments or as a functional element serve. To connect the cap to the metal body the cap usually has several locking projections in undercuts engage the metal body.

It is a disadvantage of the known connection arrangements that the cap not easily from an inexpensive plastic, such as. B. Polyamide-6 (PA6) can be produced. Such plastics are subject namely a certain susceptibility to deformation. For example PA6 absorbs moisture from the air and expands in the process. Thereby can the engagement connection of a plastic cap with the metal base body lose their effect, so that the cap of the Basic body falls off. A snap connection of a metal cap with the Metal body is due to the low elasticity of the two metal parts not possible.

It is an object of the invention to provide a connection arrangement with a Metal base body and a cap to create the metal base body in a permanently reliable way and without outside fastening elements recognizable in the cap are covered with the cap can.

This object is achieved on the one hand in that the plastic cap is formed (plastic cap), and that the connection arrangement has a plastic connecting part on the metal base body is attachable and on which the plastic cap to form a Plastic-plastic contact can be locked.

According to the invention, a plastic connecting part is therefore provided, with which can also be connected to the plastic cap. Possible deformations caused by environmental influences thus have an effect of plastics, especially expansions of polyamides, in in essentially the same way on both the cap and the Connection part from, so that the stability of this connection even in If the plastics used are susceptible to deformation does not deteriorate significantly in the long run.

Since the plastic cap both the metal body and that attached plastic connector covered, the attachment of the connecting part on the base body in any known manner take place, so also by means of additional fasteners that after Covering with the cap is no longer recognizable from the outside.

The plastic connecting part can be a Functional element act when using the connection arrangement fulfills other tasks as building hardware or as a sanitary element.

To make the snap connection between the cap and the connecting part can have locking projections and corresponding undercuts be provided on the cap and the connecting part. Preferably the undercut on the plastic connecting part or on the Plastic cap designed as a spring-back undercut. This ensures the stability of the connection between the cap and the connecting part increased even further because, on the one hand, a higher original engagement pressure between the locking projection and the spring undercut can be provided, and because the spring travel of the spring undercut Deformation of the plastic cap and the plastic connecting part to compensate for each other to an even greater extent can

The spring undercut can be used as an undercut on a longitudinal extension be formed by the plastic connecting part or of the plastic cap across, especially at right angles to that direction extends along which the locking projection into the undercut formed should grip (direction of engagement). It is preferred if the The longitudinal direction of this longitudinal process is also transverse, in particular extends perpendicular to the direction along which the plastic cap to cover the base body including the connecting part to be placed on the plastic connector (direction of attachment). In this way, the one that forms the spring undercut Longitudinal process within the main extension plane of the connecting part run so that the plastic connecting part with a shallow depth and can be manufactured in a particularly simple manner.

In addition or as an alternative to the springback described above The design of the undercut can also be that of the snap connection provided between the plastic cap and the plastic connecting part Snap projection be designed to be resilient.

For the production of the plastic cap and the plastic connecting part can target plastics with different relative to each other Deformation susceptibility can be used. In doing so, extent and direction of the expected deformation are taken into account. Inexpensive plastics can be used at least in part, for which a comparatively high susceptibility to deformation is accepted can be.

With a flat design of the metal base body, the plastic connecting part and the plastic cap can be the connecting part for immediate snap connection with the cap between the cap and be arranged the base body, or the base body is between the connecting part and the cap arranged, at least the undercuts or locking projections of the connecting part protrude the base body to the snap connection with the cap enable.

The object of the invention is for a connection arrangement of the entry mentioned type to the other solved in that the cap Metal is formed (metal cap) that the connection arrangement Has plastic connecting part that can be attached to the metal base body and at least one resilient undercut (Spring undercut), and that the metal cap at least has a locking projection assigned to the spring undercut, through which the metal cap with the plastic connector can be locked.

In this embodiment, a metal cap is therefore provided is not directly connected to the metal base body, but with a connecting part fastened to the metal base body Plastic, for example made of a polyamide, is locked. For that owns the plastic connecting part has one or more spring undercuts, and the metal cap has corresponding locking projections.

Due to the resilient design of the plastic connecting part The undercut formed can also be the one formed from metal Cap with the arrangement of metal body and plastic connecting part be snapped to cover this arrangement. Any subsequent deformation of the plastic connector can by the springback effect of the spring undercut be compensated for, so that a reliable seat of the Metal cap is guaranteed.

For the further embodiment of the embodiment of the invention with Metal cap are the features of the embodiment with a plastic cap transferable accordingly. In particular, the spring undercut on a cross to the direction of engagement and / or Longitudinal extension of the plastic connecting part in the direction of attachment be formed, and the connecting part can with respect to the metal cap be arranged in front of or behind the metal body. Moreover it is possible to attach a plastic connecting part to the metal body with one or more resilient locking projections to be provided and corresponding undercuts on a metal cap provide for receiving these locking projections.

Fig. 1a - 1c

eine Rückansicht bzw. eine Seitenansicht bzw. eine Vorderansicht eines Kunststoff-Verbindungsteils,

Fig. 2a - 2c

eine Rückansicht bzw. eine Seiten-Querschnittsansicht entlang der Ebene IIb-IIb bzw. eine Vorderansicht eines Metall-Grundkörpers,

Fig. 3a - 3c

eine Rückansicht bzw. eine Seiten-Querschnittsansicht entlang der Ebene IIIb-IIIb bzw. eine Vorderansicht einer Kappe,

Fig. 4

eine Querschnittsansicht entlang der Ebenen IV-IV des Kunststoff-Verbindungsteils, des Metall-Grundkörpers und der Kunststoff-Kappe gemäß der Fig. 1a bis 3c im Zustand der gegenseitigen Verbindung und Montage an einer Befestigungsfläche,

Fig. 5a

eine Rückansicht einer alternativen Ausführungsform eines Metall-Grundkörpers,

Fig. 5b

eine Schnittansicht des Metall-Grundkörpers nach Fig. 5a entlang der Schnittlinie Vb-Vb in Fig. 5a,

Fig. 5c

eine Schnittansicht des Metall-Grundkörpers nach Fig. 5a entlang der Schnittlinie Vc-Vc in Fig. 5a,

Fig. 6a

eine Draufsicht auf eine alternative Ausführungsform eines mit dem Metall-Grundkörper nach den Fig. 5a bis 5c zu verwendenden Kunststoff-Verbindungsteils, und

Fig. 6b

eine Schnittansicht des Kunststoff-Verbindungsteils nach Fig. 6a entlang der Schnittlinie VIb-VIb in Fig. 6a.

Further embodiments of the invention are described in the subclaims and are described below by way of example with reference to the drawings. These show a connection arrangement according to the invention, namely in:

1a-1c

a rear view or a side view or a front view of a plastic connecting part,

2a-2c

a rear view or a side cross-sectional view along the plane IIb-IIb or a front view of a metal base body,

3a-3c

a rear view or a side cross-sectional view along the plane IIIb-IIIb or a front view of a cap,

Fig. 4

2 shows a cross-sectional view along the planes IV-IV of the plastic connecting part, the metal base body and the plastic cap according to FIGS.

Fig. 5a

2 shows a rear view of an alternative embodiment of a metal base body,

Fig. 5b

5a shows a sectional view of the metal base body according to FIG. 5a along the section line Vb-Vb in FIG. 5a,

Fig. 5c

5a shows a sectional view of the metal base body according to FIG. 5a along the section line Vc-Vc in FIG. 5a,

Fig. 6a

a plan view of an alternative embodiment of a plastic connecting part to be used with the metal base body according to FIGS. 5a to 5c, and

Fig. 6b

a sectional view of the plastic connecting part according to Fig. 6a along the section line VIb-VIb in Fig. 6a.

The above designations of the viewing directions refer to on the arrangement of the parts of the connection arrangement shown in the assembled state shown in Fig. 4 on a mounting surface.

1a-1c show a plastic connecting part 11 of a connecting arrangement, the as a fitting on a door to hold a door handle as well as a locking cylinder. The plastic connector 11 has four recessed locking areas 15 with rectangular recesses on a rear side 13 17. At each rest area 15 there is one Rectangular recess 17 integrally formed longitudinal extension 19. The outside of each longitudinal extension 19 extends parallel to the corresponding narrow side of the plastic connecting part 11 A front 21 of the plastic connecting part 11 is each longitudinal extension 19 bevelled towards its outside. The plastic connector 11 also has a pusher opening 23, a Lock opening 25 and four fastening openings 27.

2a-2c show an assigned to the plastic connecting part 11 Metal base body 29. This has four rectangular recesses 31, a handle opening 33, a lock opening 35 and four fastening openings 37, the location and extent of the recesses 17th or openings 23, 25, 27 of the plastic connecting part 11 correspond.

In addition, the metal base body 29 has a rear 39 Fold 41. The fold 41 is interrupted at the rectangular recesses 31, and there are at right angles to the metal body 29 locking tabs 43. The locking tabs 43 are with respect to the fold 41 set back and have one at each of their two longitudinal ends Detent tooth 45.

3a to 3c show an associated cap 47. This has a circumferential one Edge area 49, which is perpendicular to the main direction of extension the cap 47 and on the inside - according to the arrangement of the longitudinal extensions 19 on the plastic connecting part 11 - four latching projections 51 with a nose-shaped cross section are arranged (see also Fig. 4). In addition, the cap 47 has one of the pusher openings 23, 33 and lock openings 25, 35 of the plastic connecting part 11 or the metal base body 29 corresponding pusher opening 53 and Lock opening 55 on.

The assembly of the plastic connecting part 11, the metal base body 29 and the cap 47 is carried out in the following way: First, for the purpose of pre-assembly, the plastic connecting part 11 on the Metal base body 29 fastened by the plastic connecting part 11 with its front 21 in the fold 41 on the back 39 of the metal base body 29 is used. The latching tabs 43 engage behind with their locking teeth 45, the rectangular recesses 17 on their transverse edges. Alternatively or additionally, the plastic connecting part 11 and the metal base body 29 also via the fastening openings 27, 37 or other fastening openings as well as corresponding fastening elements be attached to each other.

After this pre-assembly, the metal base body 29 can be attached in this way be attached to a door that the fold 41 with its narrow side on the Door abuts and the plastic connecting part 11 between the door, the Metal base body 29 and the fold 41 is caught. The basic body 29 can, for example, via the fastening openings 37 with the door be screwed.

If necessary after inserting further components, the cap 47 can be opened the metal base body 29 or from the rectangular recesses 31 of the metal base body 29 protruding longitudinal extensions 19 of the Plastic connector 11 are placed. Thereby lie first the locking projections 51 of the cap 47 on the bevels of the longitudinal processes 19 on. With further touchdown movement the longitudinal processes 19 pushed back into the respective rectangular recess 17, and the Locking projections 51 can be made along the outside of the longitudinal extensions 19 up to the level of the locking areas 15 on the rear 13 of the plastic connecting part 11 slide. There snap-in projections 51 snap on the likewise recessed rear side 13 of the longitudinal processes 19.

The longitudinal extensions 19 thus form undercuts for the locking projections 51 of the cap 47, the longitudinal extensions 19 with respect to the direction of engagement, in which the locking projections 51 ultimately the longitudinal extensions 19 cover, are designed to spring back. The rectangular recesses 17 on the plastic connecting part 11 are therefore not only used for receiving the locking tabs 43 of the metal base body 29, but also as Spring back area for the longitudinal processes 19. The deepened formation of the Latching areas 15, in particular the longitudinal extensions 19, enable a snapping in the locking projections 51 of the cap 47 also in such cases where the plastic connector 11 on the mounting surface in question is present.

Fig. 4 shows the so attached to a mounting surface 57 Connection arrangement in a cross section along the planes IV-IV, which are shown in Fig. 1c for the plastic connecting part 11 and accordingly chosen for the metal base body 29 and the cap 47 are. 4, the cap 47 is in one Setting direction 59 on the metal base body 29 together with the plastic connecting part 11 placed, and engage behind the locking projections 51 the longitudinal extensions 19 each in an engagement direction 61.

From Fig. 4 it can be seen that the internal dimensions of the on the mounting surface 57 adjacent fold 41 of the metal base body 29 slightly larger are selected as the dimensions of the outline of the plastic connecting part 11. Stand only at the rectangular recesses 31 the longitudinal extensions 19 of the plastic connecting part serving as spring undercuts 11 over the fold 41 of the metal base body 29 about. The internal dimensions of the edge region 49 of the cap 47 correspond to the External dimensions of the longitudinal extensions 19 in their relaxed state. The Depth of the cap edge region 49 is selected so that when on the metal base body 29 adjacent cap 47 whose edge region 49 on the fastening surface 57 rests and the locking projections 51 secure the longitudinal extensions 19 reach behind. The fold 41 and the locking tab 43 of the metal base body 29 and the rear 13 of the plastic connecting part 11 are also on the mounting surface 57.

The cap 47 can - like the plastic connecting part - made of plastic be made. In this case, the locking projections 51 of the cap 47 to an increasing extent out of engagement with the longitudinal processes 19 reach if the cap 47 is due to moisture absorption extends along the sectional plane shown in Fig. 4. However, this will Effect compensated by the fact that the plastic connecting part 11 with its longitudinal extensions 19 is made of plastic and, if necessary expands in the appropriate directions.

Alternatively, the cap 47 can also be made of metal. In this Fall can be the resilient configuration of the 19 formed by the longitudinal processes Undercuts for making the snap connection required inherent elasticity of the locking projections 51 of the metal cap 47 compensate. Expansion due to moisture absorption of the plastic connecting part 11 is transferred to the longitudinal processes 19 and reinforces the locking connection received with the locking projections 51.

The locking connection between the locking tabs 43 of the metal base body 29 and the rectangular recesses 17 of the plastic connecting part 11, on the other hand, is not critical to a possible deformation of the plastic connecting part 11, since this latching connection is simply loved the pre-assembly of plastic connector 11 and metal base 29 serves together. After fastening the metal body 29 on the fastening surface 57 is the plastic connecting part 11 - as shown in Fig. 4 - between the metal base body 29 and the mounting surface 57 is clamped.

An alternative possibility for this locking connection is in FIGS. 5a to 5c and 6a and 6b for a further metal base body 29 'and a another plastic connecting part 11 'shown. Within deposed Locking areas 15 of the further plastic connecting part 11 'is in each case a longitudinal extension 19 and a resilient locking undercut 63 provided on the front 21 of the further plastic connecting part 11 'is chamfered towards the outer circumference thereof (cf. FIG. 6b).

The further metal base body 29 'has a circumferential fold 41 Rectangular recesses 31 (see FIG. 5b). Adjacent to each rectangular recess 31 protrudes from the inner peripheral surface of the fold 41 Latch 65 in the direction of the longitudinal center axis of the further metal base body 29 '.

For the pre-assembly explained, the further metal base body 29 'is attached attached to the further plastic connecting part 11 'by such the plastic connecting part 11 'is placed, which the locking lugs 65th engage behind the locking undercuts 63 or the locking undercuts 63 spring back to the catches 65.

Furthermore, it is possible to make the plastic connecting part 11 out of less to produce plastic that is susceptible to deformation, e.g. from PA12, while a comparatively for the production of the cap 47 made of plastic inexpensive plastic, for example PA6, can be selected can.

Reference list

11

Plastic connector

13

back

15

Rest area

17th

Rectangular recess

19th

Longitudinal process

21

front

23

Pusher opening

25th

Lock opening

27

Mounting hole

29

Metal body

31

Rectangular recess

33

Pusher opening

35

Lock opening

37

Mounting hole

39

back

41

Fold

43

Locking tab

45

Locking tooth

47

cap

49

Edge area

51

Locking projection

53

Pusher opening

55

Lock opening

57

Mounting surface

59

Direction of touchdown

61

Direction of engagement

Claims (16)

Connection arrangement with a metal base body (29) and a cap (47) for covering the metal base body (29),
characterized, that the cap (47) is made of plastic (plastic cap), and that the connection arrangement has a plastic connecting part (11) which can be fastened to the metal base body (29) and on which the plastic cap (47) can be locked to form a plastic-plastic contact. Connection arrangement according to claim 1,
characterized, that for locking the plastic cap (47) on the plastic connecting part (11), the plastic cap (47) and the plastic connecting part (11) have at least one locking projection (51) or an undercut (19), or vice versa . Connection arrangement according to claim 2,
characterized, that the undercut (19) is designed to spring back (spring undercut). Connection arrangement according to claim 3,
characterized, that the undercut (19) is designed for resilient configuration on a longitudinal extension (19), the longitudinal direction of which extends transversely to an engagement direction, along which the latching projection (51) engages in the undercut (19). Connection arrangement according to claim 4,
characterized, that the longitudinal direction of the longitudinal extension (19) extends transversely to a mounting direction along which the plastic cap (47) can be placed on the plastic connecting part (11) for mutual locking. Connection arrangement according to claim 4 or 5,
characterized, that the longitudinal extension (19) on the plastic connecting part (11) or on the plastic cap (47) is integrally formed. Connection arrangement according to one of claims 4 to 6,
characterized, that the longitudinal extension (19) in the relaxed state along its longitudinal direction from the plastic connecting part (11) or from the plastic cap (47) is spaced apart. Connection arrangement according to one of the preceding claims,
characterized, that the plastic cap (47) and the plastic connecting part (11) are each formed from a plastic that is relatively more or less susceptible to deformation, in particular from PA6 or PA12. Connection arrangement according to one of the preceding claims,
characterized, that the metal base body (29) is provided for arrangement between the plastic connecting part (11) and the plastic cap (47). Connection arrangement according to claim 9,
characterized, that the plastic connecting part (11) is provided for arrangement between the metal base body (29) and a fastening surface (57), in particular a door. Connection arrangement according to one of claims 1 to 8,
characterized, that the plastic connecting part (11) is provided as an insert for arrangement between the metal base body (29) and the plastic cap (47). Connection arrangement according to one of the preceding claims,
characterized, that the plastic connector (11) by a snap connection and / or by a screw connection and / or by clamping between the metal base body (29) and a door (57) can be fastened to the metal base body (29). Connection arrangement according to claim 12,
characterized, that to produce the snap connection between the plastic connecting part (11) and the metal base body (29), the plastic connecting part (11) has at least one inlet opening (17) and the metal base body (29) has at least one locking tab (43) has at least one latching tooth (45) projecting in a longitudinal direction of the latching tab (43), the extent of the latching tab (43) in the longitudinal direction being approximately as large as the corresponding extent of the inlet opening (17). Connection arrangement according to claim 12,
characterized, that to produce the locking connection between the plastic connecting part (11) and the metal base body (29) the metal base body (29) has at least one locking lug (65) which is angled on an inner side surface of the metal base body (29) Fold (41) is arranged, and the plastic connecting part (11) on an outer boundary surface has a catch undercut (63) which corresponds in shape and arrangement to the catch (65), the catch (65) and / or the locking undercut (63) is designed to spring back. Connection arrangement with a metal base body (29) and a cap (47) for covering the metal base body (29),
characterized, that the cap (47) is made of metal (metal cap), that the connection arrangement has a plastic connecting part (11) which can be fastened to the metal base body and has at least one resilient undercut (19) (spring undercut), and that the metal cap (47) has at least one locking projection (51) assigned to the spring undercut (19), by means of which the metal cap (47) can be locked to the plastic connecting part (11). Connection arrangement according to one of the preceding claims,
characterized, that the plastic is a polyamide.

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