WO2016023690A1

WO2016023690A1 - Wiper blade lip for a windshield wiper device

Info

Publication number: WO2016023690A1
Application number: PCT/EP2015/065857
Authority: WO
Inventors: Florian Hauser; Marcel Spaan; Peter Deak; Michael Weiler; Wim Buseyne
Original assignee: Robert Bosch Gmbh
Priority date: 2014-08-11
Filing date: 2015-07-10
Publication date: 2016-02-18
Also published as: CN106660524A; CN106660524B; FR3024697A1; FR3024697B1; DE102014215837A1

Abstract

The present invention relates to a wiper blade lip (100) adapted to a windshield wiper device. The wiper blade lip (100) has a longitudinal extension which is substantially perpendicular to a wiping direction. The wiper blade lip (100) comprises at least one core element (102) made of a first material which has a first modulus of elasticity, and at least one windshield contact element (104) made of a second material which has a second modulus of elasticity, wherein the first modulus of elasticity is lower than the second modulus of elasticity.

Description

description

Wiper lip for a windshield wiper device

The disclosure relates to a wiper lip for a windscreen wiper device for a vehicle, in particular a motor vehicle, and more particularly to a windshield wiper device with such a wiper lip. The disclosure further relates to a method for providing or changing a wiper lip, and relates to a method for producing a wiper lip.

State of the art

Windscreen wiper devices typically have a wiper arm or wiper lever, wherein a wiper blade, to which a wiper lip is fastened, is moved on the window of a motor vehicle. The wiper arm is moved alternately between a first turning position and a second turning position. For this purpose, the wiper arm is connected via the drive shaft with a wiper motor. In particular, on windshields with strong changes in curvature wiper blade with the wiper lip easily loses contact with the disc. This can lead to unwanted wiping areas or to fogging, in particular in the case of strongly curved panes.

The wiper lip should exert a uniform and sufficient contact pressure (bearing force) on the window of the vehicle, in particular to allow a good wiping effect and to avoid streaking. However, the contact pressure exerted on the disk can change during wiping, for example due to fluctuations in the superordinate structure (eg spring rail, lower arm of a Fin-Ray wiper), as a result of which a wiping effect may be impaired and streaking may occur. Therefore, there is a need to further improve wiper lips, in particular to compensate for such fluctuations in the contact pressure or compensate. Also, the contact pressure should provide the highest possible edge pressure between the disc and the wiper lip, in order to allow a good wiping effect and to prevent streaking. Therefore, there is a need to further improve wiper lips, in particular to achieve a good edge pressure between washer and see wiper lip.

In the improvement of windshield wiper devices, there are a number of boundary conditions that should be considered. These include the cost of manufacturing and the cost of production, the cost of materials, but also the properties of the windshield wiper device, in particular the function under a variety of conditions and longevity under a variety of conditions. It has to be taken into account in wiper devices for vehicles that the cost pressure constantly increases and that the vehicles can be used in a large number of climatic conditions, so that e.g. extreme temperature values occur permanently and / or with large fluctuations.

DISCLOSURE OF THE INVENTION It is the object of the present disclosure to provide a wiper lip with which at least one or more of the abovementioned disadvantages are reduced or essentially do not occur.

This object is solved by the subject matters of the independent claims.

According to embodiments of the present disclosure, a wiper lip adapted for a windshield wiper device is provided. The wiper lip has a longitudinal extent which is substantially perpendicular to a wiping direction. The wiper lip comprises at least one core element of a first material having a first modulus of elasticity; at least one disc contact element made of a second material having a second modulus of elasticity, wherein the first modulus of elasticity is smaller than the second modulus of elasticity. According to embodiments of the present disclosure, a windshield wiper device with a wiper blade with an elongate upper part, which is is designed at least partially bendable, an elongated lower part, which is designed at least partially bendable, and a plurality of connecting elements for connecting the upper part and the lower part. The connecting elements are spaced apart along a longitudinal extent of the wiper blade, wherein the connecting elements are designed to allow a movement of the upper part and the lower part relative to each other with a movement component along a longitudinal extent of the wiper blade, and wherein the wiper device is adapted for a vehicle , in particular motor vehicle, wherein the wiper blade comprises a wiper lip. The wiper lip has a longitudinal extent which is substantially perpendicular to a wiping direction. The wiper lip comprises at least one core element of a first material having a first modulus of elasticity; at least one disc contact element of a second material having a second modulus of elasticity, wherein the first modulus of elasticity is smaller than the second modulus of elasticity.

According to a further embodiment of the disclosure, a method for providing or changing a wiper lip for a windshield wiper for a motor vehicle, in particular a wiper lip, is provided. The method comprises inserting the wiper lip along the longitudinal extension of the wiper lip or gluing the wiper lip. The wiper lip has a longitudinal extent which is substantially perpendicular to a wiping direction. The wiper lip comprises at least one core element of a first material having a first modulus of elasticity; at least one disc contact element of a second material having a second modulus of elasticity, wherein the first modulus of elasticity is smaller than the second modulus of elasticity.

According to embodiments of the disclosure, a method for producing a wiper lip is provided. The method comprises providing at least one core element made of a first material having a first modulus of elasticity with at least one disk contact element made of a second material having a second modulus of elasticity, wherein the first modulus of elasticity is smaller than the second elastic modulus of elasticity. Module is.

Preferred, optional embodiments, and particular aspects of the disclosure will be apparent from the dependent claims, the drawings, and the present description. Advantages of the Disclosure According to the embodiments described here, wiper lips for wiper devices, in particular wiper lips for fin-wiper windshield wipers for vehicle windows, can be produced in a particularly favorable manner and / or for a multiplicity of different fields of use. The present embodiments of the wiper lip according to the embodiments described herein allow a particularly good adaptation to the curvature of a

Disc. This ensures a particularly good and accurate wiping of the disc. Non-wiped areas of the disc and fog on the disc can be largely avoided. The structural design of the wiper lip described in the foregoing enables a largely uniform and sufficient contact pressure of the wiper lip on the window, so that a high wiping quality is provided. The wiper lips described here can be combined in a favorable manner with finray wiper devices, since these are suitable by their geometric configuration for the use of the wiper lips described here.

For example, to achieve high surface pressure or edge pressure, conventional wiper lips have a fragile thin wall profile structure with constant modulus of elasticity (e.g., wiper lips made of EPDM, NR, and CR have an E modulus of about 5 MPa). By using a reduced modulus of elasticity for the core region and a harder material for the disk contact element, for example, a simple thick-walled cross-section for the wiper lip can be used, and a high surface pressure can be achieved in particular by the harder material of the disk contact element. Thus, an improved wiping effect can be achieved and streaking can be avoided. Further, the first material of the core portion may be a foam material that may be used as a water reservoir, for example to wet the disk.

In some embodiments, the at least one core element and / or the at least one wafer contact element extend substantially parallel to the longitudinal extension of the wiper lip. The wiper lip thus has an extension substantially perpendicular to the wiping direction. According to embodiments of the disclosure, the at least one disk contact element comprises a wiping edge. The Wischkannte may be designed for contact with the window of the vehicle. For example, the wiping edge can exert the contact pressure on the disk.

In typical embodiments, the at least one disk contact element at least partially encloses the at least one core element, in particular wherein the at least one disk contact element at least partially surrounds a peripheral surface of the at least one core element. In some embodiments, the at least one disk contact element may enclose the at least one core element by more than 50%. As a result, for example, a flexibility of the wiper blade can be set or adjusted. Also, the wiper lip can be manufactured with a reduced material cost for the disk contact element with the higher E-modulus, which material and costs could be saved.

In some embodiments, the at least one core member may have a cross-section substantially perpendicular to the longitudinal extent of the wiper lip, the cross-section being substantially triangular. The triangular cross-section may be substantially equilateral or substantially isosceles. For example, the at least one core element can have a region facing the disk, wherein the region facing the disk comprises a corner or apex of the triangular cross section. The at least one disk contact element may be arranged on the region of the at least one core element facing the disk. Thus, the wiper lip can be made in a simple manner, with a simple cross-section and with reduced material costs.

According to some embodiments, the triangular cross-section has a base surface opposite to the region facing the disk. The base may be designed for connection to the windshield wiper device. In particular, the disk contact element between the base and the window of the vehicle can be arranged. In some embodiments, the at least one core element may have a cross section substantially perpendicular to the longitudinal extent of the wiper lip, wherein the cross section is substantially quadrangular. For example, the at least one core element may have an area facing the disk, wherein the area facing the disk comprises a first base area of the quadrangular cross section. The at least one disk contact element may be arranged on the region of the at least one core element facing the disk. Thus, the wiper lip can be made in a simple manner, with a simple cross-section and with reduced material costs. According to some embodiments, the first footprint may be configured for connection to the windshield wiper device. In particular, the disk contact element can be arranged between the first base area and the window of the vehicle. In some embodiments, the quadrangular cross-section may have a second footprint that includes, for example, the disk-facing portion or the disk-facing portion. The first base may be substantially parallel to the second base.

According to some embodiments, the at least one disk contact element has a substantially triangular contact region. The triangular contact region may be designed for contact with the disc, and in particular a corner or tip of the triangular contact region may be designed for contact with the disc. The triangular contact area may be or include the wiping edge. In some embodiments, the triangular contact area may be a sharp edge or a sharp tip. Thus, the contact pressure can be applied well to the disc, so that a wiping effect is improved and streaking is avoided. In some embodiments, the at least one disk contact element has a substantially beam-shaped contact region extending in the longitudinal extent of the wiper lip. The beam-shaped contact region can be inserted or embedded in the core element, so that the beam-shaped contact region protrudes from the core element, for example to form the wiping edge. Thus, the wiper lip can be made easily and with reduced material costs for the disc contact element.

In exemplary embodiments, at least two, and in particular exactly two, disk contact elements may be provided. For example, the two disc contact elements may be formed in a layered manner. In some embodiments, the two disk contact elements may be connected to two opposite the, the disk facing, sides of the triangular cross section of the at least one core element may be arranged. Thus, the wiper lip can be made easily and with reduced material costs for the disc contact element. Next, the flexibility of the wiper lip can be adjusted for example by adjusting the layer thickness.

According to embodiments, the at least one disk contact element is mounted on the at least one core element or coated on the at least one core element. Thus, the wiper lip, and in particular the at least one disc contact element, can be manufactured easily.

According to embodiments that may be combined with other embodiments described herein, the core member has at least one projection adapted for contact with the window of the vehicle, and in particular during a wiping movement of the windscreen wiper device for contact with the window of the vehicle Vehicle is set up. The at least one projection may be arranged to moisten or wet the disc. For example, the first material may be an absorbent material. This can be provided via the first material of the core area a cleaning function for the disc, which can be implemented easily and easily.

According to embodiments of the disclosure that can be combined with other embodiments described herein, the at least one disc contact element is made of a material from the group consisting of: TPE (thermoplastic elastomer), in particular TPE-S, TPE-O, TPE-U, TPE-A, TPE-V, TPE-E; Ethylene-propylene-diene rubber (EPDM); Polychloroprene and natural rubber. The choice of material of the disk contact element allows the adjustment of the physical properties of the disk contact element, for example a flexibility.

According to embodiments of the disclosure that may be combined with other embodiments described herein, the at least one core element is one of material selected from the group consisting of: a foam, especially comprising thermoplastic foams, elastomeric foams, and thermosetting foams. The choice of material of the core element allows the adjustment the physical properties of the core element, such as flexibility. Further, the core member made of foam material can be easily and inexpensively manufactured. According to embodiments of the disclosure that may be combined with other embodiments described herein, a windshield wiper device is provided with a wiper blade having an elongate top portion that is at least partially bendable, an elongate bottom portion that is at least partially bendable, and a plurality of connector elements for connecting the body Upper part and the lower part specified. The connecting elements are spaced apart along a longitudinal extent of the wiper blade, wherein the connecting elements are designed to allow movement of the upper part and the lower part relative to each other with a movement component along a longitudinal extent of the wiper blade, and wherein the Scheibenwischvornungung is adapted for a vehicle, in particular Motor vehicle, wherein the wiper blade comprises a wiper lip according to the embodiments described herein. The windscreen wiping device may, for example, be a fin-ray wiper.

According to a further embodiment, a method for changing a wiper lip for a windshield wiper for a motor vehicle, in particular a wiper lip according to one of the embodiments described here is provided. The method includes inserting the wiper lip along the longitudinal extent of the wiper lip and / or gluing the wiper lip. As a result, replacement of the wiper lip with low and / or reduced material costs for the part to be replaced can be achieved.

According to another embodiment, a method for producing a wiper lip is specified, in particular a wiper lip according to the embodiments described here. The method comprises: providing at least one core element of a first material having a first modulus of elasticity with at least one disk contact element of a second material having a second modulus of elasticity, wherein the first modulus of elasticity is smaller than the second modulus of elasticity Elasticity module is. Thus, the wiper lip can be easily manufactured at low or reduced material costs. According to embodiments of the disclosure, providing the at least one core element with the at least one wafer contact element comprises at least partially coating the core element with the second material. Thus, the wiper lip, and in particular the at least one disc contact element, can be manufactured easily.

In some embodiments, providing the at least one core member with the at least one disk contact member comprises heating a portion of the core member to form the disk contact member. By heating the first material with the first modulus of elasticity, the first material is transformed into the second material with the second modulus of elasticity. Thus, the wiper blade, and in particular the at least one disc contact element, can be manufactured easily. According to some embodiments, providing the at least one core member with the at least one disk contact member comprises forming a first layer of the first material to form the at least one core member; and forming a second layer of the second material on the first layer to form the at least one wafer contact element. Thus, the wiper lip can be easily manufactured at low or reduced material costs.

Brief description of the drawings

Embodiments of the disclosure are illustrated in the figures and will be described in more detail below. Show it:

FIG. 1A is a schematic illustration in cross section of a wiper lip according to embodiments of the present disclosure,

1 B is a schematic illustration in cross section of a further wiper lip according to embodiments of the present disclosure; FIG. 1 C is a schematic illustration in cross section of another wiper lip according to embodiments of the present disclosure; FIG. 1 D shows a schematic representation in cross section of yet another wiper lip according to embodiments of the present disclosure,

FIG. 2A shows a schematic illustration of a windshield wiper device with a wiper blade according to embodiments of the disclosure in a basic position,

FIG. 2B shows a schematic illustration of the windshield wiper device according to embodiments of the disclosure according to FIG. 2A in a position applied to a windshield,

3A shows a schematic representation of a further exemplary embodiment of a windshield wiper device according to the disclosure in the form of a wiper arm with integrated wiper blade in a basic position, FIG.

3B shows a schematic representation of the wiper arm with integrated wiper blade according to FIG. 3A in a position applied to a pane, FIG.

4A-C is a schematic representation of a manufacturing process of a wiper lip according to embodiments of the disclosure,

FIG. 5 shows a schematic representation of another production process of a wiper lip according to embodiments of the disclosure,

FIG. 6 shows a schematic representation of a further production process of a wiper lip according to embodiments of the disclosure, and

FIG. 7 shows a schematic representation of a further wiper lip according to embodiments of the present disclosure.

Embodiments of the disclosure

In the following, unless otherwise stated, the same reference numerals are used for the same and equivalent elements. FIG. 1A shows a schematic illustration in cross section of a wiper lip 100 according to embodiments of the present disclosure.

According to embodiments of the disclosure, a wiper lip 100 adapted for a windshield wiper device is provided. The wiper lip 100 has a longitudinal extension that is substantially perpendicular to a wiping direction of the windshield wiper device. The wiper lip 100 includes at least one core member 102 made of a first material having a first modulus of elasticity; and at least one disk contact element 104 of a second material having a second modulus of elasticity, wherein the first modulus of elasticity is smaller than the second modulus of elasticity.

By using a reduced modulus of elasticity for the core region 102 and a harder material for the disk contact element 104, for example, a simple thick-walled cross section for the wiper lip 100 can be used, and a high surface pressure can be achieved in particular by the harder material of the disk contact element 104. Thus, an improved wiping effect can be achieved and streaking can be avoided. The modulus of elasticity (also tensile modulus, coefficient of elasticity, expansion modulus, modulus of elasticity or Young's modulus) indicates the relationship between stress and strain in the deformation of a solid body with linear elastic behavior. The elastic modulus has the unit of a mechanical stress. The amount of modulus of elasticity is the greater, the more resistance a material opposes to its elastic deformation. A high modulus material is thus stiffer than a low modulus material.

In some embodiments, the at least one core element 102 and / or the at least one disk contact element 104 extend substantially parallel to the longitudinal extension of the wiper lip 100. The wiper lip 100 thus has an extension substantially perpendicular to the wiping direction.

According to some embodiments, the at least one disk contact element 104 has a substantially triangular contact region. The triangular contact region may be designed for contact with the disk, and in particular a corner of the triangular contact region may be in contact with the disk Be designed disc. The triangular contact area may be a wiping edge 106. The wiper 106 may be configured for contact with the window of the vehicle. For example, the wiping edge 106 can exert the contact pressure on the disk. In the example of FIG. 1A, the wiping edge 106 is of triangular design, wherein a corner or an edge of the triangular wiping edge 106 is designed for contact with the window of the vehicle. Due to the triangular shape of the wiper edge, a high edge pressure between the disc and the wiper lip can be provided, which allows a good wiping effect and reduces or even prevents streaking.

In typical embodiments, the at least one wafer contact element 104 at least partially encloses the at least one core element 102, for example to more than 50%. In the example of FIG. 1A, the at least one disk contact element 104 completely encloses a peripheral surface of the at least one core element 102. As a result, for example, a flexibility of the wiper blade 100 can be set by, for example, adjusting a thickness or layer thickness of the at least one wafer contact element 104. The wiper lip 100 can also be produced with a reduced material expenditure for the disk contact element 104 with the higher modulus of elasticity, whereby material and costs can be saved.

In some embodiments, the at least one core member 102 may have a cross-section substantially perpendicular to the longitudinal extent of the wiper lip 100, the cross-section being substantially quadrangular. For example, the at least one core element 104 may have a region facing the disk, wherein the region facing the disk comprises a base surface 108 of the quadrangular cross section. The at least one disk contact element 104, and in particular the wiping edge 106, may be arranged on the region of the at least one core element 102 facing the disk. Thus, the wiper lip 100 can be produced in a simple manner, with a simple cross-section and with a reduced cost of materials. According to some embodiments, the footprint is adapted for connection to the windshield wiper device. In particular, the disk contact element between the base and the window of the vehicle can be arranged. According to embodiments of the disclosure that may be combined with other embodiments described herein, the at least one disc contact element 106 is made of a material selected from the group consisting of: TPE (Thermoplastic Elastomer), in particular TPE-S, TPE-O, TPE-U , TPE-A, TPE-V, TPE-E; Ethylene-propylene-diene rubber (EPDM); Polychloroprene and natural rubber. The choice of material of the disk contact element 106 allows adjustment of the physical properties of the disk contact element 106, for example flexibility or rigidity. According to embodiments of the disclosure that may be combined with other embodiments described herein, the at least one core member 102 is made of a material selected from the group consisting of: a foam, especially thermoplastic foams, elastomeric foams, and thermosetting foams. The choice of material of the core element 102 allows the adjustment of the physical properties of the core element 102, for example, the flexibility or rigidity. Further, the core member 102 made of foam material can be easily and inexpensively manufactured.

According to some embodiments that may be combined with other embodiments, the wiper lip 100 is attachable by means of an adhesive layer 190 to a carrier, for example to a carrier of the windshield wiper device.

FIG. 1B shows a schematic illustration in cross-section of a further wiper lip 120 according to embodiments of the present disclosure.

The at least one core element 122 has a cross section substantially perpendicular to the longitudinal extension of the wiper lip 120, the cross section being substantially triangular. For example, the at least one core element 122 may have a region facing the disk, wherein the region facing the disk comprises or is a corner 128 of the triangular cross section.

According to some embodiments, the triangular cross-section has a base surface that faces the region facing the disk. The base may be designed for connection to the windshield wiper device. For example, the adhesive layer 190 may be disposed on the base. In In some embodiments, the disk contact element 124 may be disposed between the base and the window of the vehicle.

The at least one disk contact element 124 may be arranged on the region of the at least one core element 122 facing the disk. Thus, the wiper lip 120 can be manufactured in a simple manner, with a simple cross-section and with a reduced cost of materials.

In some embodiments, the at least one disk contact element 124 has a substantially beam-shaped contact region located in the

Lengthwise extension of the wiper lip 120 may extend. The beam-shaped contact region may be inserted or embedded in the core element 122 such that the beam-shaped contact region projects out of the core element 122, for example to form the wiping edge. For example, the bar-shaped contact area may protrude from a corner of the core element 122, and in particular from a corner of the core element 122 facing the window of the vehicle.

FIG. 1 C shows a schematic illustration in cross section of another wiper lip 140 according to embodiments of the present disclosure.

The wiper lip 140 of FIG. 1 C differs from the embodiment of FIG. 1A only in the configuration of the disk contact element 144.

The at least one core element 142 has a cross section substantially perpendicular to the longitudinal extent of the wiper lip 140, the cross section being substantially quadrangular. For example, the at least one core element 144 may have a region facing the disk, wherein the region facing the disk comprises a second base surface 148 of the quadrangular cross section. The at least one disk contact element 144 may be arranged on the region of the at least one core element 142 facing the disk. In the example of FIG. 1C, the disk contact element 144 has a triangular shape and is arranged on a second base surface 148 of the quadrangular cross section, such that the core element 142 and the disk contact element 144 together form or have a triangular shape or a triangular cross section. According to some embodiments, the quadrangular cross-section has a first base surface that faces the disk-facing region. The first base may be configured for connection to the windshield wiper device. For example, the adhesive layer 190 may be disposed on the first base. In particular, the disc contact element between the first base and the disc of the vehicle may be arranged.

FIG. 1 D shows a schematic representation in cross section of yet another wiper lip 160 according to embodiments of the present disclosure.

The wiper lip 160 of Figure 1 D differs from the embodiment of Figure 1 B only in the configuration of the disc contact element. The core element 162 has a triangular cross-section. In exemplary embodiments, at least two, and in particular exactly two, disk contact elements 164, 165 may be provided. For example, the two disk contact elements 164, 165 may be formed in a layered manner. In some embodiments, the two disk contact elements 164, 165 may be disposed on two opposite, disk-facing, sides of the triangular cross-section of the at least one core element 162. At the corner 168 of the core element 162 facing the window of the vehicle, a wiping edge is formed by regions of the two window contact elements 164, 165. Thus, the wiper lip 160 can be made easily and with reduced material costs for the disk contact element 164, 165. Furthermore, the flexibility of the wiper lip 160 can be adjusted, for example, by adjusting the layer thickness.

According to embodiments which can be combined with other embodiments, the at least one wafer contact element 164, 165 is coated on the at least one core element 162. Thus, the wiper blade 160, and in particular the at least one wafer contact element 164, 165, can be easily manufactured.

According to further embodiments, which can be combined with the embodiments described here, the rigidity of the wiper lip can be determined over the length of the windscreen wiper device, ie along the longitudinal extent of the windscreen wiper device. Wiper device, variable, ie spatially variable, can be provided. Hereby, any existing force fluctuations along the longitudinal extent of the windshield wiper device can be adapted via the adapted stiffness of the wiper lip.

The wiper lip or the wiper blade can be attached to a structure of the windshield wiper device, for example by gluing, inserting or clamping. This allows easy replacement of the wiper blade or wiper blade for the windshield wiper device, for example a finray wiper. As a result, a simple possibility can be made available for the trade to replace the wiper lip or the wiper blade of a windshield wiper device. Due to the fact that only the wiper lip or the wiper blade is replaced, a reduced or minimized cost of materials is required for the exchange. This is among other things favorable for the ever-increasing efforts to act ecologically sensible.

The following describes an exemplary windshield wiper device for which the wiper blade described herein can be used. In principle, however, the wiper blade described herein can also be used for other windshield wiper devices.

FIGS. 2A and 2B show schematic representations of a wiper 2 with a wiper blade in a basic position (FIG. 2A) and in a position applied to a window (FIG. 2B) according to embodiments of the windscreen wiper device of the disclosure. The wiper 2 is used to wipe a window 4 of a vehicle, which is for example a motor vehicle, in particular a car. Usually, the wiper 2 is attached to a wiper arm, which is driven for wiping by means of a motor. For this purpose, the wiper 2 has a holder 6, to which it can be attached to the windshield wiper arm. The wiper 2 is located in FIG. 2A in a basic position in which it is at least partially lifted off the window 4. The wiper 2 has a longitudinal extension 8, which may be parallel to the longitudinal extension of the wiper lip or this, and has an elongated upper part 10 and a likewise elongated lower part 12. The longitudinal extent of the upper part 10 and of the lower part 12 corresponds essentially to the longitudinal extent 8 of the wiper 2. Both the upper part 10 and the lower part 12 are bendable beams or can be configured as bendable beams, which are each formed in one piece in FIGS. 2A and 2B by way of example. This allows a particularly stable construction. It is also possible to design only one part of the upper part 10 and / or of the lower part 12 in a bendable manner. Furthermore, it is alternatively possible, the upper part 10 designed in two parts, in which case one end of the two parts of the two-part upper part 10 are then attached to the holder 6.

According to some embodiments, which may be combined with the other embodiments described herein, a material is used for the upper part 10 and / or the lower part 12, which has a modulus of elasticity in a range between 0.005 kN / mm ² and 0, 5 kN / mm ² , in particular 0.01 kN / mm ² and 0.1 kN / mm ² . This allows a suitable bending ability of the upper part 10 and the lower part 12. Together with a suitably designed

Cross-sectional area of the upper part 10 and the lower part 12 thus results in an optimal flexural rigidity. The top 10 and the bottom 12 are arranged to face each other. Both ends of the upper part 10 are fixedly connected to outer connecting positions 14 and 16, each having one end of the lower part 12. Otherwise, the upper part 10 and the lower part 12 are spaced apart from each other.

The upper part 10 and the lower part 12 are interconnected by connecting elements 18. In particular, in the basic position of the wiper 2, these run approximately transversely to the longitudinal extent 8 of the wiper 2. The connecting elements 18 are attached to facing inner longitudinal sides of the upper part 10 and the lower part 12 by means of hinges 20. The hinges 20 are hinges here. In particular, the hinges 20 may be formed as film hinges. This is particularly advantageous when upper part 10, lower part 12 and / or connecting elements 18 are made of a plastic material or coated with a suitable plastic material.

According to typical embodiments described herein that may be combined with other embodiments described herein, a hinge is selected from the group consisting of: a hinge, a living hinge, a taper of the material to provide lower stiffness along a torsional axis, a Joint with a rotation axis, a means for connecting the upper part 10 with the connecting element 18 or for connection the lower part 12 with the connecting element 18, which allows the displacement of the lower part 12 with respect to the upper part 10 along the longitudinal extension 8, etc.

Embodiments in which the hinge is provided by a living hinge thus provide a very simple way to provide the hinges for a fin-ray wiper. According to typical embodiments, the film hinges have a high extensibility. This can be provided, for example, by a material selected from the group PP, PE, POM, and PA. Alternatively, the film hinges may be made of one or more materials selected from the group consisting of: TPE (Thermoplastic Elastomer), for example, TPE-S, TPE-O, TPE-U, TPE-A, TPE-V, and TPE-E.

The connecting elements 18 are spaced apart along the longitudinal extension of the wiper 2. The distances between each two adjacent connecting elements 18 are the same. But you can also be chosen differently. The distances are advantageously less than 50 mm, in particular less than 30 mm. As a result, a particularly high flexibility of the windshield wiper device, in particular of its lower part, and good adaptation to the curvature and changes in curvature of the windshield to be wiped can be ensured. In Figure 2A, a distance 22 is representative of the distances between each two connecting elements 18 shown. The connecting elements 18, in particular in the basic position of the wiper 2, are fastened to the lower part 12 in such a way that their longitudinal axes extend at angles 26 to the lower part 12, which lie between 65 ° and 15 °, in particular between 75 ° and 105 °. Particularly advantageous are the angles between 80 ° and 100 °. This advantageously ensures a particularly good transmission of a force acting on the lower part 12 force on the upper part 10. Furthermore, a particularly stable windscreen wiper device can be achieved in this way. The same applies to the fastenings of the connecting elements 18 on the upper part 10.

The same applies in the present embodiment for the attachments of the connecting elements 18 on the upper part 10. In FIG. 2A, by way of example for the longitudinal axes of the connecting elements 18, a longitudinal axis 24 and exemplarily for the angle between the connecting elements 18 and the lower part 12, an angle 26 is shown. The distances between the upper part 10 and the lower part 12 are determined mainly by the lengths of the connecting elements 18. The lengths of the connecting elements 18 increase, starting from the two outer connecting positions 14, 16, to approximately those points at which the holder 6 attached to the upper part 10 begins. As a result, upper part 10 and lower part 12 form a double wedge in side view of the wiper 2 according to FIG. 2A, the tips of the two wedges facing in opposite directions. The connecting elements 18 are designed kink-resistant.

FIG. 2B shows a schematic representation of the wiper 2 according to FIG. 2A in a position applied to the pane 4. Since the disc 4 has a curvature, contact pressure forces act on the lower part 12 when the wiper 2 is applied to the disc 4. Since the upper part 10 and the lower part 12 bendable beams and the connecting elements 12 are rotatably mounted on upper part 10 and lower part 12, the upper part 10 and the lower part 12 are mutually displaceable. By acting from below on the lower part 12 compressive forces, the wiper 2 bends in the direction from which the pressure forces come, and applies exactly to the curvature of the disc 4 at.

By constructing the embodiments described herein, upon application of force to the base 12 (through the disc 4), bending of the base 12 occurs in the direction in which the force acts. This is provided by the connection of the upper part 10 and the lower part at a connecting positions 14 and / or 16, the shape, and by hinges at the connection between the connecting elements and the upper and lower part.

In the illustration according to FIG. 2B, there is a small distance between the wiper 2 and the disk 4, which here serves only to clarify the disk 4 and the wiper 2 and which, in reality, when the wiper 2 is applied to the disk 4, is largely the same is available. Furthermore, typically located on the underside of the lower part 12 facing away from the upper part 10 is a wiper lip according to the embodiments described herein, which wipes on the disk 4 for wiping. For reasons of clarity, the wiper lip is not shown in FIGS. 2A and 2B. A windscreen wiper according to embodiments described herein utilizes the effect of tail fins of certain fish, which do not deflect in the direction of pressure when lateral pressure but buckle in the opposite direction, ie in the direction from which the pressure comes. This principle is also referred to as a fin jet principle or "fin ray" principle, which has the advantage of improved windscreen wiper blade adaptation according to the embodiments described herein it is not bendable.

Figures 2A and 2B show the wiper 2 with the longitudinal extension 8, which extends substantially between the connection positions 14 and 16. Such an arrangement is often used for windshield wipers. Alternatively, a Scheibenwischvornchtung but also have only one connection position, which corresponds to a halving of the Scheibenwischvornchtung analogous to Figures 2A and 2B, and wherein, for example, provided at a position of the holder 6, a rotation axis. Such an arrangement is often used for rear wiper. This is exemplified inter alia in Figures 3A and 3B. Optional configurations and details, as described in the individual embodiments, can generally be used for both variants of a system, a windscreen wiper device.

FIG. 3A shows a schematic representation of a further exemplary embodiment of the windscreen wiping device according to the disclosure in the basic position. The windscreen wiper device here is a wiper arm with an integrated wiper 2, which is attached to a fastening part 30. The attachment member 30 is connected to a wiper motor 32 which drives the attachment member 30 to wipe the disc 4. The wiper 2 is wedge-shaped, wherein one end of the upper part 10 is fixedly connected to an end of the lower part 12 at an outer connecting position 34. The respective other end of the upper part 10 and the lower part 12 are fastened to the fastening part 30. With regard to the basic structure and in particular the fastenings of the connecting elements 18 corresponds to the Scheibenwischvornchtung according to Fig. 3A in principle that of FIG. 2A. 3B shows a schematic representation of the wiper 2 with integrated wiper arm 30 according to FIG. 3A in a position applied to the pane 4. Here too, pressure forces act on the lower part 12 of the wiper 2 from below, in the direction of the disk 4, so that the lower part 12 and the upper part 10 bend in the direction of the disk 4.

Both in Fig. 2A and in Fig. 3A, the wiper 2 is shown in its not applied to the disc 4 position such that the lower part 12 is formed substantially straight. According to still further embodiments, which can be combined with other embodiments, the lower part 12 is convex in the unloaded state, i. with a curvature that projects away from the upper part 10 in a middle region. The windscreen wiper according to the embodiments described herein may typically assume contact with a disk 4 from the convex shape of the base, then the corresponding concave shape of the base 12 which conforms to the disk 4.

According to a further preferred embodiment, the plurality of connecting elements 18 may be connected to the upper part 10 at a plurality of upper connecting positions and to the lower part 12 at a plurality of lower corresponding connecting positions, wherein the distance between a first and second lower parts 12 and 12 is relatively small upper connection positions and a corresponding lower connection position, is substantially constant, in particular constant with a deviation of ± 1 mm. In this way, a power transmission between the upper part 10 and the lower part 12 can be made available, which makes possible a windscreen wiping device which operates in accordance with the finray principle.

The connecting elements 18 are fastened to mutually facing inner longitudinal sides of the upper part 10 and of the lower part 12 by means of rotary joints 20. Typically, the hinges 20 are hinges. In particular, the hinges 20 may be formed as film hinges. This is particularly advantageous when the upper part 10, the lower part 12 and / or the connecting elements 18 are made of a plastic material or coated with a suitable plastic material. According to typical embodiments described herein that may be combined with other embodiments described herein, a hinge is selected from the group consisting of: a hinge, a living hinge, a taper of the material to provide lower stiffness along a torsional axis, a Joint with a rotation axis, a means for connecting the upper part 10 with the connecting element or for connecting the lower part 12 with the connecting element 18, which allows the displacement of the lower part 12 with respect to the upper part 10 along the longitudinal extension 8, etc. The connecting elements 18 are connected to the upper part 10 at a respective upper connecting position and to the lower part 12 at a respective lower connecting position. For example, a rotary joint is provided at the connection positions. During a movement of the upper part 10 of the lower part 12 relative to one another, the distance between an upper connection position and a lower connection position on the same connection element 18 does not change substantially, ie the distance is with deviations of, for example, ± 1 mm, in particular ± 0.3 mm constant.

Next, the wiper 2 has a head end. At the head end is a fastening part 30, i. a wiper blade-side fixing member 30, provided. Along the longitudinal extent 8 of the wiper 2, the distance between the upper part 10 and the lower part 12 starting from the head end is smaller, at least in areas of the longitudinal extension 8 of the wiper 2 and in a major part of the longitudinal extent 8 of the wiper 2. Starting from the head end runs Height of the wiper 2 in areas wedge-shaped or becomes smaller in areas of the longitudinal extent 8. For example, according to embodiments for a plurality of the connecting elements 18, the length of the connecting elements 18 may be provided such that the connecting elements 18 provided at the head end are longer than those on the opposite side of the wiper 2 along the longitudinal extent 8.

The wiper lip according to the embodiments described herein may be provided on the underside of the base 12. For this purpose, for example, an anchoring to the bottom of the finray structure exist. FIGS. 4A-C show a schematic illustration of a manufacturing process of a wiper lip 400 according to embodiments of the disclosure. FIGS. 4A-C schematically show the production of two wiper lips 400 in a single manufacturing process.

In accordance with embodiments that may be combined with other embodiments described herein, a method of making a wiper lip 400 is provided. The method comprises providing a core member 402 of a first material having a first modulus of elasticity with at least one disk contact element 404 of a second material having a second modulus of elasticity, wherein the first modulus of elasticity is less than the second elasticity Module is. Thus, the wiper lip 400 can be easily manufactured at low or reduced material costs. According to embodiments of the disclosure, providing the at least one core element 402 with the at least one wafer contact element 404 comprises at least partially coating the core element 402 with the second material. Thus, the wiper lip 400, and in particular the at least one wafer contact element, can be manufactured easily.

In the example of FIGS. 4A-C, the core element 402 is coated with a foil in order to form the wafer contact element 404. In particular, the film coated on the core element 402 forms the wafer contact element 404. A heat tool with heat elements 410 and 41 1 can be used for coating. The heat elements 410 and 41 1 have a pointed shape and are moved toward the core element 402 from opposite sides of the core element 402, the film being located between the core element 402 and the heat elements 410 and 41 1. As a result, the film is heated and coated on the core element 402.

FIG. 5 shows a schematic illustration of another production process of a wiper lip 500 according to embodiments of the disclosure.

In some embodiments, providing the at least one core member 502 with the at least one disk contactor 504 includes heating a portion 503 of the core member 502 about the disk contactor 504 train. By heating the first material with the first modulus of elasticity, the first material is transformed into the second material with the second modulus of elasticity. Thus, the wiper lip 500, and in particular the at least one disc contact element 504, can be easily manufactured.

For heating area 503 of the core member 502, a heater 510 may be used. The heater 510 may be, for example, an electric heater or a gas fired heater. FIG. 6 shows a schematic representation of a further production process of a wiper lip according to embodiments of the disclosure.

According to some embodiments, providing the at least one core member 602 with the at least one wafer contact member 604 comprises forming a first layer 603 of the first material to form the at least one core member 602; and forming a second layer 605 of the second material on the first layer 603 to form the at least one wafer contact element 604. Thus, the wiper lip can be easily manufactured at low or reduced material costs.

For example, the first layer 603 and the second layer 605 may be formed on each other, and then the wiper lip may be cut out of the layer stack, as indicated by the dashed line 601 in FIG.

The layer stack may comprise one or more further layers, for example a third layer 606 on the opposite side of the first layer 603 from the second layer 605. The third layer 606 may, according to embodiments, consist of the second material of the second layer 605, ie may be made of the same Material may be formed as the disc contact element 604. Further, the adhesive layer 190 may be present. The adhesive layer 190 may be disposed directly on the first layer 603 or on the side of the third layer 606 opposite the first layer 603. FIG. 7 shows a schematic representation of a further wiper lip 700 according to embodiments of the present disclosure. The wiper lip 700 includes the core member 720 and the disk contact member 740. The disk contact member 740 is configured to contact a disk 4. The core member 720 includes a first part 721, a second part 722, and a connecting land 723 connecting the first part 721 and the second part 722 to each other. The first part 721 may be designed to be attached to the windscreen wiper device, and in particular to a carrier of the windscreen wiper device, for example by gluing, inserting and / or clamping.

The first part 721 and the second part 722 are movable via the connecting web 723 to each other. Thus, the second part 722 may tilt or twist during a wiping movement with respect to the first part 721, and may in particular tilt or rotate about an axis which is parallel to the longitudinal extent of the wiper lip.

According to embodiments which may be combined with other embodiments described herein, the core member 720 has at least one projection 724 adapted for contact with the disc 4 of the vehicle, and more particularly during a wiping movement of the windscreen wiping means for contact with the disc 4 of the vehicle is set up. The at least one projection 724 may be arranged to moisten or wet the disk 4. The first material of the core member 720 may be a foam material, and particularly an absorbent foam material, such as an absorbent sponge. As a result, the core element 720, and in particular the at least one projection 724, can absorb and / or store a liquid, and can moisten or wet the pane 4 during the wiping movement. As a result, a wiping effect of the wiper lip is improved.

For example, in the idle state of the windscreen wiping device, the at least one projection 724 may be arranged at a distance from the disk 4, ie, the second part 722 is not or only slightly tilted or twisted with respect to the first part 721. During the wiping movement, the second part 722 tilts or twists with respect to the first part 721 by the between the disc contact element 740 and the disc 4 occurring frictional force. As a result, the at least one projection 724 can contact the disk 4 and moisten or moisten it with a liquid. The liquid may be, for example, water, a cleaning agent or a combination thereof.

Claims

claims

1 . A wiper lip (100) adapted for a windshield wiper device, wherein the wiper lip (100) has a longitudinal extent that is substantially perpendicular to a wiping direction, wherein the wiper lip (100) comprises:

at least one core member (102) of a first material having a first modulus of elasticity;

at least one disc contact element (104) of a second material having a second modulus of elasticity,

wherein the first modulus of elasticity is smaller than the second modulus of elasticity.

2. The wiper lip (100) according to claim 1, wherein the at least one core element (102) and / or the at least one disk contact element (104) extend substantially parallel to the longitudinal extent of the wiper lip (100).

3. The wiper lip (100) of claim 1 or 2, wherein the at least one wafer contact element (104) comprises a wiper edge (106).

4. The wiper lip (100) of claim 1, wherein the at least one wafer contact element (104) at least partially surrounds the at least one core element (102), in particular wherein the at least one wafer contact element (104) comprises a peripheral surface of the at least one core element (104). 102) at least partially, and in particular more than 50%, encloses.

5. The wiper lip according to one of claims 1 to 4, wherein the at least one core element has a cross section substantially perpendicular to the longitudinal extent of the wiper lip, and wherein the cross section is substantially triangular.

6. The wiper lip of claim 5, wherein the at least one core member has a portion facing the disk, and wherein the disk facing portion comprises a corner of the triangular cross section.

7. The wiper lip (100) according to any one of claims 1 to 4, wherein the at least one core element (102) has a cross section substantially perpendicular to the longitudinal extent of the wiper lip (100), and wherein the cross section is substantially quadrangular.

8. The wiper lip (100) according to claim 7, wherein the at least one core element (102) has a region facing the disk, and wherein the region facing the disk comprises a base surface (108) of the quadrangular cross section.

9. The wiper lip (100) according to claim 6 or 8, wherein the at least one disc contact element (104) on the disc facing portion of the at least one core element (102) is arranged.

10. The wiper lip (100) according to any one of claims 1 to 9, wherein the at least one disc contact element (104) has a substantially triangular contact area.

1 1. The wiper lip according to any one of claims 1 to 9, wherein the at least one disc contact element has a substantially bar-shaped contact region extending in the longitudinal extension of the wiper lip.

12. The wiper lip according to any one of claims 1 to 9, wherein two disc contact elements are provided.

13. The wiper lip according to claim 12, wherein the two disk contact elements are formed in a layered manner.

14. The wiper lip of claim 13, wherein the two disc contact elements on two opposite, the disc facing sides of the triangular

Cross section of the at least one core element are arranged.

15. The wiper lip (100) of claim 1, wherein the at least one wafer contact element (104) is mounted on the at least one core element (102) or on which at least one core element (102) is coated.

16. The wiper lip according to claim 1, wherein the core element has at least one projection adapted for contact with the window of the vehicle, and which is set up for contact with the window of the vehicle, in particular during a wiping movement of the windshield wiper device ,

17. The wiper lip (100) according to one of claims 1 to 16, wherein the at least one disc contact element (104) consists of a material from the group consisting of: TPE (thermoplastic elastomer), in particular TPE-S, TPE-O, TPE-U , TPE-A, TPE-V, TPE-E; Ethylene-propylene-diene rubber (EPDM);

Polychloroprene and natural rubber is.

18. The wiper lip (100) of claim 1, wherein the at least one core element (102) is made of a material selected from the group consisting of: a foam, in particular comprising thermoplastic foams, elastomeric foams, and thermosetting foams.

19. Windscreen wiper device having a wiper blade (2) with an elongate upper part (10), which is designed to be at least partially bendable, an elongate lower part (12) which is at least partially bendable, a plurality of connecting elements (18) for connecting the upper part (10). 10) and the lower part (12), wherein the connecting elements (18) along a longitudinal extent (8) of the wiper blade (2) are spaced from each other, and wherein the connecting elements (18) are adapted to movement of the upper part (10) and the Bottom part relative to each other with a movement component along a longitudinal extent (8) of the wiper blade (2) to allow, and wherein the windshield wiper device is adapted for a vehicle, in particular motor vehicle, wherein the wiper blade (2) a wiper lip (100) according to one of Claims 1 to 18 comprises.

20. A method for providing or changing a wiper lip for a

Windscreen wiper for a motor vehicle, in particular a wiper lip according to one of claims 1 to 18, comprising:

Insertion of the wiper lip along the longitudinal extension of the wiper lip or gluing the wiper lip.

21. A method for producing a wiper lip, in particular a wiper lip according to one of claims 1 to 18, wherein the method comprises:

Providing at least one core element made of a first material having a first modulus of elasticity with at least one disk contact element of a second material having a second modulus of elasticity, the first modulus of elasticity being smaller than the second modulus of elasticity ,

22. The method of claim 21, wherein providing the at least one core member with the at least one disk contact member comprises at least partially coating the core member with the second material.

23. The method of claim 21, wherein providing the at least one core member with the at least one disk contact member comprises heating a portion of the core member to form the disk contact member.

24. The method of claim 21, wherein the providing of the at least one core element with the at least one wafer contact element comprises:

Forming a first layer of the first material to form the at least one core element; and

Forming a second layer of the second material on the first layer to form the at least one wafer contact element.