Wiper arm

Abstract

The invention relates to a wiper arm (10) for a vehicle wiping system, which has a holding mechanism (12) which is provided to hold a wiper blade, wherein an end of the holding mechanism (12) is mounted to a carrier element (14) which can be fastened on the vehicle. According to the invention, a protection (20) is provided in the region (16) of the holding mechanism (12) and / or in the transition (18) between the holding mechanism (12) and the carrier element (14), so that sharp edges (22) in the region (16) are avoided.

Description

TECHNICAL FIELD

[0001] The invention relates to a wiper arm for a vehicle wiping system, wherein the wiper arm has a holding mechanism which is provided to hold a wiper blade, wherein an end of the holding mechanism is mounted on a carrier element which can be fastened on the vehicle. BACKGROUND

[0002] Wiper arms consisting of a wiping rod and a fastening part which is mounted on an output mechanism of a wiping system of a vehicle in order to be able to produce a swinging movement of the wiper arm are known. A wiper blade which is mounted on the wiper arm can thereby be swung over a vehicle glass which is to be wiped. The wiper arms are made of metal and have sharp edges whose radius is less than 1 mm. SUMMARY

[0003] The task on which the invention is based is to provide a wiper blade which has as few sharp edges as possible.

[0004] The task is solved according to the invention in that a protection means or a protection measure (Vorkehrung) is provided in the region of the transition between the holding mechanism and the carrier element and / or of the holding mechanism, in order to avoid sharp edges in this region. The transition between the holding mechanism and the carrier element is characterized by a measure in terms of connection, such as a splice or a krimpen, a rivet, a fusion and / or a soldering or other measures, which rigidly connect the holding mechanism and the carrier element to each other. On the transition, the following edges can remain here, which are rounded and / or covered, for example, by the protection means. Thereby, for example, the risk of injury can be reduced. The region comprises at least all edges of the holding mechanism and / or of the transition, which point away from the driving direction of the vehicle. All edges can also be included by the region.

[0005] An advantageous refinement can comprise that the holding means are a rod- or tube-like structure, the free end of which is provided for fastening a wiper blade, and the opposite end of which is inserted in the carrier element. On the rod- or tube-like structure, for the connection of the wiper blade, an adapter is constructed on the free end. On the end of the rod- or tube-like structure opposite the free end, the transition is positioned between holding means and carrier element. The rod- or tube-like structure is in particular inserted in the carrier element and is gripped by this at one end. The carrier element can be stamped and bent from a sheet or plate. The holding means can be fastened on the carrier element by a splitting process or Krimpprocess.

[0006] Advantageously, a coating can be applied to the region of the holding means and / or transition, which comprises in particular metal, plastic and / or rubber. The coating covers the edge so that it is no longer directly exposed. The coating surrounds the edge and on the one hand produces a radius on the outer surface of the coating in the region of the edge, which is greater than the radius of the edge; and on the other hand, the coating can be selected from a material which is preferably softer and / or more elastic than the material of the edge. Thereby, the risk of injury is strongly minimized.

[0007] Particularly preferably, the coating can be produced by a membrane which is elastic and / or heat-shrinkable. In this way, the membrane can be expanded and pulled onto the holding means. Advantageous in this case is that the membrane is shaped in a hose-like or stocking-like manner. Here, the membrane can be firmly adhered to the holding means by elastic relaxation. Alternatively or in addition, the membrane can be caused to shrink by a heat input or cold input and thereby achieve a firm fit on the holding means. Alternatively or in addition, a bonding membrane can be used which is bonded on for example by a thermal and / or chemical process. By the membrane, the edge in the region of the transition and / or holding means is covered.

[0008] Furthermore, the coating can be a sleeve-like element which is pulled onto the holding mechanism and is connected to the transition, in particular without folds. The sleeve-like element can be conically configured, wherein an opening is configured on the tapering portion, through which the holding mechanism is inserted. On the wider end of the sleeve-like element, the transition is abutted. The sleeve-like element can be made of a rubber-like material or plastic or metal. In this case, in particular, the edge of the transition between holding mechanism and carrier element is blunted. In this case, in particular, the edge of the transition is not covered, but the sleeve-like element abuts to the side of the transition which constitutes the edge. Each edge is constituted by two mutually angularly ending sides, wherein the sides are surfaces which constitute the outer surface of the holding mechanism and / or the carrier element.

[0009] In particular, in order to firmly hold the coating on the holding mechanism, at least one resistance mechanism can be configured. The resistance mechanism can preferably be configured as a groove and / or an adhesive. For example, the sleeve-like element can thereby be seated in a secure manner.

[0010] An alternative embodiment comprises that the coating is a welded or brazed material which, in particular, rounds off the edges in the region of the transition. Here, an additional material of a metal can be introduced into a recess which is positioned in the region of the transition, thereby, for example, forming a radius which is connected to the respective edge and covers the side of the edge.

[0011] A possibility of covering the edges consists in providing the coating as pulverized and melted or sprayed or applied plastic. For example, an electrostatic powder of an epoxy-containing plastic can be provided. Such a provision is particularly well suited to mass production.

[0012] In order to obtain rounded edges without additional material, the edges of the transition can be deformed by a cold reforming process or a cutting forming process. For example, the edges can be deformed by a punch, by a grinding element and / or by a cutting wedge such that the edges have a greater radius than before the reforming.

[0013] It goes without saying that the features mentioned above and still to be explained below are usable not only in the combinations respectively specified, but also in other combinations. In particular, different protection means for covering and rounding the edge can be combined with one another. Furthermore, instead of a rounding, a beveling or flattening of the edge can be provided. Alternatively or in addition, the angle of the edge can be increased. In principle, a protection element can also be arranged in the rotatable upper part of the adapter. The scope of the invention is limited only by the claims.

[0014] The invention is further explained by means of an embodiment with reference to the drawing. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawing shows:

[0016] Fig. 1 A wiper arm without protection means to avoid sharp edges;

[0017] Figure 2 A wiper arm with a film arranged on the holding mechanism and the transition;

[0018] Fig. 3 A wiper arm with additional material applied on the transition;

[0019] Figure 4 A manufacturing method to modify the edge on the transition;

[0020] Fig. 5 A wiper arm with a sleeve on the transition.

[0021] LIST OF REFERENCE NUMBERS

[0022] 1 Radial direction

[0023] 10 Wiper arm

[0024] 12 Holding mechanism

[0025] 14 Carrier element

[0026] 16 Area

[0027] 18 Transition

[0028] 20 Protection means

[0029] 22 Edge

[0030] 24 Free end

[0031] 26 Opposed end

[0032] 28 Covering layer

[0033] 30 resistance mechanism

[0034] 32 groove DETAILED DESCRIPTION

[0035] Fig. 1 shows a wiper arm 10 comprising a holding mechanism 12 which is manufactured from flat material as a metal rod. The holding mechanism 12 is rigidly connected with a carrier element 14. The carrier element 14 is mounted on a drive of a wiping system of a vehicle, wherein the drive places the wiper arm 10 in a swinging motion. On a free end 24 of the holding mechanism 12 a wiper blade can be mounted which sweeps a vehicle window during the swinging motion. The opposite end 26 is fixedly arranged in the carrier element 14, for example by crimping or crimping. The carrier element 14 is shaped from a sheet and in the region 16 of the transition 18 between the holding mechanism 12 and the carrier element 14 an edge 22 of the carrier element 14 is configured which points in the direction of the free end 24. Furthermore, the edge points outwards in the driving direction of the vehicle. The flat material of the holding mechanism 12 also has an edge 22 which extends along the entire region 16 of the holding mechanism 12.

[0036] The region 16 of the transition 18 and a part of the region 16 of the holding mechanism 12 are shown in Figure 1 B The edge 22 is configured by the flat sides of the holding mechanism 12 and the carrier element 14. This side which configures the edge 22 encloses an angle. Between the holding mechanism 12 and the carrier element 14 a groove 32 is configured in the region of the transition 18 which is configured by the side of the carrier element 14 facing the holding mechanism 12 and the side of the holding mechanism 12.

[0037] In Figure 2The protective device 20 is shown to cover the edge 22 located in the region 16. For this purpose, a covering 28 in the form of a diaphragm is provided, wherein the diaphragm is constructed in a tubular shape. The diaphragm can contain plastic and / or rubber. Furthermore, the diaphragm can be elastic or can shrink by heat or cold treatment. If the diaphragm is pulled onto the region 16 and pulled over the edge 22 of the transition portion 18 and / or the holding mechanism 12, then the edge 22 is covered. Here, the diaphragm can be elastically stretched and pulled over the region 16. Alternatively, the diaphragm can be arranged onto the region 16 and heat-treated to produce shrinkage. Alternatively, the diaphragm can be glued on. In this case, the diaphragm can be formed either in a tubular or sheet shape. The diaphragm can be wound around the region 16 for later glued over the edge. The glued application can be thermal or chemical.

[0038] Figure 3 shows the alternative protective device 20. In Figure 3A The image shows a wiper arm 10 without protective devices. Figure 3D The region 16 of the transition portion 18 is provided with a coating 28, which is applied to the groove 32 of the transition portion 16 by means of fusion welding and / or brazing. The coating 28 is an additional metallic material that is circumferentially joined to the groove 32 around the retaining mechanism 12, as shown in... Figure 3B As shown in the diagram. Furthermore, in the creased area (which can be...) Figure 3C On the lower side of the carrier element 14 (as seen in the middle), along the adjacent line (on which the edges of the plates of the carrier element 14 are adjacent to each other), the cladding 28 is also embedded by fusion welding and / or brazing.

[0039] exist Figure 4 The diagram illustrates a method for rounding the edge 22. Instead of rounding, the angle of the edge 22 can also be increased, beveled, or flattened. Here, the edge 22 of the transition portion 18 is cold-shaped using a punch 32, which is guided onto the transition portion 18 from a radial direction 1. This is achieved by a stroke from a first position 321 to a second position 322 of the die, in which the forming occurs. This forming can be performed during a creping process, by means of which the retaining mechanism 12 is secured in the carrier element 14. Here, the edge 22 is formed, and preferably, the groove 32 is formed simultaneously.

[0040] Figure 5AAn alternative is shown in which the sleeve-like guard 20 is taken as a coating 28, wherein the sleeve-like portion is pushed onto the holding mechanism 12 until it hits against the edge 22 of the transition 18. The tapering end of the sleeve-like portion surrounds the rod-like holding mechanism 12, while the widened end of the sleeve-like portion rests against the carrier element 14 in the region of the recess 32. The side of the edge 22 of the transition 18 is covered by the sleeve-like portion, so that it is not exposed.

[0041] Figure 5B A resistance mechanism 30 is shown, which is constituted by grooves in the region of the transition 18. The grooves serve to fasten the sleeve-like portion, by the sleeve-like portion cooperating with the inside of the sleeve-like portion. This increases the frictional resistance.

Claims

1. A wiper arm (10) for a vehicle wiping system, having a retaining mechanism (12) configured to hold a wiper blade, wherein, One end of the retaining mechanism (12) is mounted to a carrier element (14) which can be fastened to the vehicle. The feature is that a protective device (20) is provided in the transition (18) between the retaining mechanism (12) and the carrier element (14) and / or in the region (16) of the retaining mechanism (12) to avoid sharp edges (22) in the region (16). A groove (32) is constructed in the region of the transition (18) between the retaining mechanism (12) and the carrier element (14), the groove being formed by the side of the carrier element (14) facing the retaining mechanism (12) and the side of the retaining mechanism (12). The region (16) of the transition (18) is provided with a coating (28) which is applied to the groove (32).

2. The wiper arm (10) according to claim 1, characterized in that, The retaining mechanism (12) is a rod-shaped or tubular structure, the free end (24) of which is configured to fasten a wiper blade, and the opposite end (26) of which is inserted into the carrier element (14).

3. The wiper arm (10) according to claim 1 or 2, characterized in that, A coating (28) is applied to the area (16) and / or the retaining mechanism (12), the coating comprising, in particular, metal, plastic and / or rubber, covering the edge (22).

4. The wiper arm (10) according to claim 3, characterized in that, The covering (28) is composed of a membrane that is elastic and / or heat-shrinkable.

5. The wiper arm (10) according to claim 3 or 4, characterized in that, The covering (28) is a sleeve-shaped element that is pulled onto the retaining mechanism (12) and is connected to the transition portion (18) in particular without creases.

6. The wiper arm (10) according to any one of the preceding claims, characterized in that, At least one resistance mechanism (30) is formed on the retaining mechanism (12), which is in particular grooves and / or adhesive.

7. The wiper arm (10) according to claim 3, characterized in that, The cladding (28) is a fusion-welded or brazed material, which is particularly for rounding the edges (22) in the region of the transition (18).

8. The wiper arm (10) according to claim 3, characterized in that, The coating (28) is a powdered, melted, sprayed, or coated plastic that covers the edge (22).

9. The wiper arm (10) according to claim 1 or 2, characterized in that, The transition section (18) has an edge (22) rounded by a cold-forming process or a cutting process.

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