EP0849421A1 - Door handle with metal covering - Google Patents

Abstract

The door handle (10) has a core (12) of injection-mouldable material, such as plastic, zinc or aluminium die-cast material. The core is enclosed in a stainless steel or other casing (14) with U-shaped cross-section. The cross-section of the core has a base (16) and top (18) part. The base part forms two shoulders (20) against which rests the end edge (22) of the free ends of the U's arms (24,26) of the casing. At various points (28,30,32,34,36), near the shoulders, are fitments each held by a back-tapered, recessed or through-bored part of the casing.

Description

The invention relates to a lever handle with a metal surface, especially made of stainless steel.

So far, it has been common to have such door handles on the one hand to manufacture in that a lever handle with a stainless steel surface the lever handle made entirely of this material was produced. However, this is expensive.

On the other hand, an attempt was made to save material as a result realize that the lever handle is made from drawn tube was taking different pipe pieces together were welded. The necessary work steps are, however, costly.

The object of the invention is a lever handle of the beginning to create the type mentioned, which does not have these disadvantages.

The task is solved in that the lever handle one Core from a processable in an injection mold Material such as plastic, die-cast zinc, die-cast aluminum or the like., Which exists with a stable, little Pressed-on casing construction requiring material is then equipped with the desired metal the desired metal surface is produced, in particular so from stainless steel.

Such a coat made of z. B. stainless steel sheet is essential less material than z. B. stainless steel tube a pusher has been formed so far. On the other hand this inventive construction z. B. against damage much less sensitive than is the case if the core was just with a very thin layer of stainless steel is coated, such as by Evaporation or by electrolytic plating.

According to a development of the invention, along the Lever extension in several places, each close to the Shoulders of the core an approach trained by one recess, depression or breakthrough formed by the jacket is recorded. This makes it easier to do Way a good connection between the core on the one hand and the coat on the other hand. According to another Embodiment of the invention are the free ends of the Leg of the U-profile of the jacket bent inwards and of an appropriate undercut of the core profile added.

According to yet another alternative, instead of this, Bend and pressure created connection between the core and jacket an adhesive connection can also be provided, which may only be used additionally.

To save material on the core, it can be from Be an advantage if according to yet another embodiment the head portion of the core forms recesses that are from the Coat can be bridged.

To stabilize can in the recess area of the core Bridges are provided that extend to the coat.

Plastic has proven to be particularly cheap as the core.

The invention is described below using exemplary embodiments explained in more detail, which are shown in the drawings are.

Fig. 1

in einer Vorderansicht eine erste Ausführungsform eines erfindungsgemäß ausgestalteten Türdrückers;

Fig. 2

eine Ansicht von oben auf die Ausführungsform gemäß Fig. 1;

Fig. 3

eine Ansicht von rechts auf die Ausführungsform gemäß Fig. 2;

Fig. 4

eine vergrößerte Querschnittsansicht entlang der Schnittlinie IV-IV der Fig. 2;

Fig. 5

in einer Ansicht ähnlich der Fig. 1 eine alternative Ausführungsform;

Fig. 6

eine Draufsicht auf die Ausführungsform gemäß Fig. 5;

Fig. 7

eine Ansicht von rechts auf die Ausführungsform gemäß Fig. 6;

Fig. 8

eine vergrößerte Querschnittsansicht entlang der Schnittlinie VIII-VIII der Fig. 6.

Fig. 9

eine Rückansicht des Kerns einer weiteren Ausführunsform eines erfindungsgemäß ausgestalteten Türdrückers;

Fig. 10

eine Ansicht von oben auf die Anordnung gemäß Fig. 9;

Fig. 11

eine vergrößerte Querschnittsansicht entlang der Schnittlinie XI-XI der Fig. 10; und

Fig. 12

eine vergrößerte Stirnansicht des Bereichs XII der Fig. 10.

It shows:

Fig. 1

in a front view a first embodiment of a door handle designed according to the invention;

Fig. 2

a top view of the embodiment of FIG. 1;

Fig. 3

a view from the right of the embodiment of FIG. 2;

Fig. 4

an enlarged cross-sectional view taken along section line IV-IV of Fig. 2;

Fig. 5

in a view similar to Figure 1, an alternative embodiment.

Fig. 6

a plan view of the embodiment of FIG. 5;

Fig. 7

a view from the right of the embodiment of FIG. 6;

Fig. 8

FIG. 6 shows an enlarged cross-sectional view along the section line VIII-VIII of FIG. 6.

Fig. 9

a rear view of the core of a further embodiment of a door handle designed according to the invention;

Fig. 10

a top view of the arrangement of FIG. 9;

Fig. 11

an enlarged cross-sectional view taken along section line XI-XI of Fig. 10; and

Fig. 12

10 shows an enlarged end view of area XII of FIG. 10.

1 shows a lever handle 10 in a view from the front, consisting of a core 12 which consists of a in an injection mold processable material consists of, for example Plastic, die-cast zinc, die-cast aluminum or the like. About which core 12 has a substantially U-shaped cross section having jacket 14 is inserted from stainless steel sheet. Fig. 4 shows again in an enlarged cross-sectional representation the pusher structure, which can be clearly seen in Fig. 4 is that the core cross-section has a foot region 16 and a Head area 18 includes. The foot region 16 of the cross section 4 forms two shoulders 20, on which the front edge 22 of the free ends 24, 26 of the U-leg of the Coat 14 lie flush.

Along the handle extension, see for example the Fig. 1, but also Fig. 2, a plan view of the Pushers are preferably close at several points shoulders of the core shoulders 28, 30, 32, 34, 36 provided which approaches radially project from the core 12 and into a corresponding depression or return or also Breakthrough of the jacket 14 are added.

4 is an essentially pyramid-like projection 30 to recognize that in a corresponding return or Countersink 38 of the jacket 14 is added. Such Construction is usually sufficient to avoid an unwanted Prevent slipping of the jacket 26 from the core 16, this also due to the fact that the stainless steel Coat 14 can be shaped so that it with a certain Bias must be pushed over the core 12, and so with a press fit on the side walls of the core 16 creates. As soon as the end faces 22 of the jacket 14 to the Shoulders 20 of core 16 abut, the projections also snap 28 to 36 in the corresponding depressions or Recesses 38 of the jacket and then hold the Sheath 14 in relation to the core 18 in this position in Position.

If necessary, you can also instead or additionally Adhesives are provided to add an additional one if necessary To achieve fixation.

Most of the time it is sufficient, such recesses / protrusions to be attached to the lower edges of the jacket when viewed from above 1 essentially invisible on the handle stay, these are the ones from the pusher in front view even hidden places 28, 30 and 32 as well as the only pusher points 34, 36 to be seen while the directly facing the viewer opposite the Point 30 here without such a recess, projection arrangement is left.

It makes sense if, according to FIG. 2, the handle core is one jumps back to a certain extent with respect to the jacket 14, in the area 40, where the pusher moves into a corresponding Inserted fitting element, not shown here becomes. The cross-section should then also be in this area of the core 12 be circular and a square depression 42 have, in which a square mandrel of or for the door fitting could be inserted. To this However, there is no need to go into details here as it depends on the particular fitting arrangement will be like the door handle on his in the fitting reaching end is designed.

Seen from above, see Fig. 2, the handle has one Angle at 44 is the usual L-shape, however the free end of the handle is angled by 90 °, see area 46.

The bend in these two areas 44, 46 is such executed that the coat with regard to its to the door leaf facing surface with a radius of curvature 53 - from above seen - runs approximately twice the radius of curvature 52, with which the jacket 14, the core 16 in encloses its U-shaped web region 55. In contrast is the Radius of curvature 51 for the outwardly facing surface of the Jacket about 4 times the radius of curvature 52.

The free end (front end) of the handle is also curved executed, as can be seen in FIG. 2, with a Radius of curvature 55, which corresponds to that of radius of curvature 52.

This special shape of the radii of curvature creates a particularly secure contact of the jacket 14 with the core 12 ensured.

In the embodiments shown in FIGS. 5 to 8 are the free ends 124, 126 of the legs of the U-profile of the Jacket 114 bent inwards by approximately 45 ° and into one corresponding undercut 60 of something different here designed core profile 112, however again the front edge of the free end of the U-leg of the Sheath on a shoulder 120 of the core substantially fits flush.

The advantage of this embodiment is that the possibly aesthetically disturbing protrusions / depressions, as in the embodiments according to FIGS. 1 to 4 are provided, are omitted here and thereby an overall more pleasing appearance, with additionally improved Holding force of the jacket 114 on the core 112, this due to the wrap-around force caused by the bent Areas of the U-leg ends 124, 126 around corresponding Recesses or undercuts of the core 112 are formed becomes.

For the rest, it makes sense here too, the radii of curvature to be similar to that of the embodiment 1 to 4 was described, but here the area close to the fitting insertion 140 funnel-shaped.

The holding force of the jacket structure 114 on the core 112 is so great that it is possible to part of the cladding profile remove, as can be seen, for example, in FIG. 8 is where recesses 62, 64 in particular to save material can be seen that are bridged by the jacket 114, without thereby affecting the stability of the arrangement.

The core should advantageously be shaped so that an exact fit of the end face of the cap-like Sheath construction 114 on shoulders 120 of core 112 plastic is dispensed with, as shown in Fig. 8 on the right is shown below.

By dispensing with the undercut corner, as on right upper region of the core shown in FIG. 8 is the demolding of such a molded plastic part relieved after injection molding.

The construction according to the invention is particularly advantageous because the core of the pusher, consisting for example made of plastic that takes up load while the coat made of stainless steel sheet with a thickness of 0.8, for example up to 1.0 mm a scratch-resistant and insensitive surface forms. Through the design and connection according to the invention These two materials can be cumbersome Welding, plating or gluing, a simple one Simply plug it on. Compared to welded pipe constructions there is the advantage that not only the welding of Pipe material is omitted, but also the subsequent one cumbersome cleaning of the weld seams. The other too previously used alternative of manufacturing from solid material with correspondingly high material costs avoided.

9 to 11, an embodiment is shown in more detail, the even greater material savings in the core leads. For this purpose, the core 212 again consists of a foot area 216 and one projecting thereof, relative thin-walled head region 218, see Fig. 11, so that through the recesses 262 and 264 even larger cavities compared to the embodiment of FIG. 8.

To increase the stability of the connection between the thin-walled head area 218 and foot area 216 as well further improve the leadership and support of the jacket (omitted in FIGS. 9 to 12) on the core 212 are in the Course of the axial extent of the core 212 several radially from the foot area 216 and the thin-walled head area 218 extending partition walls 70 provided up to The inside surface of the jacket is sufficient.

Claims (7)

Door handles (10, 110) with a metal surface, in particular made of stainless steel, characterized in that the door handle (10, 110) has a core (12, 112) made of a material machinable in an injection mold, such as Plastic, die-cast zinc, die-cast aluminum or the like, consists of which core (12, 112) an essentially Sheath with a U-shaped cross section (14, 114) made of stainless steel sheet or the like, where the core (12, 112) has a cross section which a foot area (16) and a head area (18) and that the foot portion of the cross section of the Kerns (12, 112) forms two shoulders (20, 120) which the front edge (22) of the free ends of the U-legs (24, 26, 124, 126) of the jacket (14, 114) in is essentially flush. Door handle according to claim 1, characterized in that along the handle extension in several places (28, 30, 32, 34, 36) close to the shoulders (22) Approach (e.g. 30) is provided by one of the Coat formed recess, depression or breakthrough (38) is included. Door handle according to claim 1, characterized in that the free ends (124, 126) of the legs of the U-profile of the jacket (114) are bent inwards and in an undercut (60) of the core profile is added are. Door handle according to claim 1, 2 or 3, characterized in that that the head area of the core recesses (62, 64) forms, which are bridged by the jacket (114). Door handle according to one of claims 1 to 4, characterized characterized in that the legs (124, 126) of the jacket (114) lie on the core (112) with a prestress. Door handle according to one of claims 1 to 5, characterized characterized that it is in its longitudinal extent is angled twice by 90 °, the Radius of curvature of the leg ends of the jacket in Area of this bend (44, 46) is larger than that Radius of curvature of the U-shaped shell in its U-web area (55). Door handle according to one of claims 3 to 6, characterized characterized in that in the course of the axial extent inside the recesses (262, 264) of the core (212) several radially from the foot area (216) and the head area (218) extending partition walls (70) are provided that extend to the inside surface of the jacket.

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