CN113119911A

CN113119911A - Wiper blade device

Info

Publication number: CN113119911A
Application number: CN202110048110.5A
Authority: CN
Inventors: D·帕伦塔
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2020-01-14
Filing date: 2021-01-14
Publication date: 2021-07-16
Also published as: FR3106104A1; DE102020200343A1

Abstract

The invention relates to a wiper blade device (12) having a spring rail (28) having at least one first spring rail element (30), at least one second spring rail element (32), at least one set of bridge elements each connecting the first spring rail element (30) to the second spring rail element (32), and at least one electrical heating element (34) for heating at least the first spring rail element (30), wherein the heating element (34) is arranged at least partially at least one bridge element (26) of the set of bridge elements.

Description

Wiper blade device

Technical Field

The invention relates to a wiper blade device (12) having a spring rail (28).

Background

A wiper blade device has already been proposed, which has at least one wiper blade adapter, at which at least one wiper arm adapter can be arranged for connecting a wiper blade to a wiper arm, wherein the wiper blade adapter has at least one base element which can be arranged at a wiper strip and/or at least one spring rail of the wiper blade.

Disclosure of Invention

A wiper blade device with a spring rail having at least one first spring rail element, at least one second spring rail element, at least one bridge element group each connecting the first spring rail element to the second spring rail element, and at least one electrical heating element for heating the first spring rail element, is proposed, wherein the heating element is arranged at least partially at least one bridge element of the bridge element group.

A "wiper blade device" is intended in this context to mean in particular at least one part, in particular a component, of a wiper blade, in particular a windshield wiper blade, and advantageously a vehicle windshield wiper blade. The wiper blade device can also comprise in particular a complete wiper blade, in particular a complete windshield wiper blade, and advantageously a complete vehicle windshield wiper blade. It is conceivable here for the wiper blade device to be designed at least as part of a wiper blade in a flat beam design and/or as part of a flat beam wiper and/or as a wiper blade in a flat beam design and/or as a flat beam wiper. The wiper blade device is preferably provided for use on a vehicle. The wiper blade device is preferably provided for cleaning surfaces, in particular for cleaning windows on vehicles. The wiper blade device is coupled to a vehicle, in particular a wiper arm of a vehicle, in particular for cleaning a vehicle window. "provided" shall mean, in particular, a special setting, a special design and/or a special equipment. An object is provided for a specific function, which is to be understood to mean, in particular, that the object fulfills and/or carries out this specific function in at least one application state and/or operating state. The term "operating state" is intended in this context to mean, in particular, a state in which the wiper blade device is ready for a wiping operation and/or a wiping operation in which the wiper strip of the wiper blade device is guided, in particular, over the vehicle window and, in this case, advantageously abuts against the vehicle window, and/or is in a wiping operation.

A "wiper arm" is to be understood to mean, in particular, a unit of a windshield wiper, which is provided for movement on a vehicle window, in particular by means of a wiper arm adapter, a wiper blade device fastened to the wiper arm, and in particular a wiper blade comprising said wiper blade device, for cleaning the vehicle window. The wiper arm is preferably arranged on at least one drive shaft of a wiper drive of a windshield wiper of a vehicle. The wiper arm can be driven, in particular, by a wiper drive to move relative to the vehicle window. The wiper arm preferably has at least one, in particular at least two, cleaning liquid supply lines, which can be connected to the cleaning water nozzles of the wiper blade.

The wiper arm preferably comprises at least one, in particular at least two, electrical supply lines, for example cables which can be connected to a wiper blade device, in particular to a supply unit of a wiper blade adapter. The electrical supply line preferably extends at least over a large part of the main extension of the wiper arm from the end of the wiper arm that can be connected to the drive shaft of the wiper drive of the vehicle to the end of the wiper arm that can be connected to the wiper arm adapter. The electrical supply line is provided in particular for supplying at least one electrical component, in particular a heating element of the spring rail. The electrical supply line is provided in particular for conducting an electrical current at least partially from a current generator, in particular a battery, a generator such as an alternator and/or a dc generator, to/into a supply unit of the wiper blade adapter. The at least one electrical supply line is preferably arranged at least substantially parallel to the wiper arm. At least two, in particular exactly two, electrical supply lines are preferably arranged at the wiper arm.

The term "wiper strip" is intended to mean, in particular, a unit made of at least one elastic material as a wiping body with a wiping lip which is provided for a contacting movement over a surface to be cleaned, in particular a glass surface, preferably a vehicle glass, for cleaning the surface to be cleaned. The wiper strip is preferably made of a natural or synthetic elastomer, in particular of plastic and/or rubber. It is conceivable for the wiper base to be of one-piece construction with the wiper lip. The "wiper lip" is to be understood in this context to mean, in particular, an elastic lip which is provided to sweep, wipe and/or clean a glass, in particular a vehicle glass, with a wiping edge. "integral" is intended to mean, in particular, that at least the components are joined together in a material-to-material manner, for example by a welding process, a bonding process, a spraying process and/or other processes considered appropriate by the person skilled in the art, and/or are advantageously formed in one piece, for example by being produced from a casting and/or by being produced in a one-component injection method or a multi-component injection method or an extrusion method, for example also in a coextrusion method and advantageously from separate blanks. This preferably means, in particular, that the component is produced in one piece, particularly preferably in a prototype process. The wiper base of the wiper strip is preferably designed to accommodate the spring rail for stabilization. The wiper strip can in particular at least partially and preferably completely form the at least one spring rail receptacle. "elastic" in this context should mean, in particular, that an object can be deformed repeatedly without mechanical damage or destruction of the object, and that the object automatically follows the basic shape again, in particular after deformation. In order to accommodate the spring rail, the wiper strip in particular at least partially and preferably completely forms the spring rail accommodation. "spring receptacle" in the present context shall mean in particular a channel or a groove, which is provided for at least partially receiving a spring rail. The spring rail receptacle is preferably provided to surround the spring rail at least over a substantial part of the main extent. The wiper strip preferably forms two spring rail receptacles which are configured as lateral receiving grooves and are provided for partially receiving in each case at least one first spring rail element and/or one second spring rail element. Alternatively or additionally, the wiper strip can form at least one spring rail receptacle, which is designed as a spring rail channel and is provided for the complete accommodation of the at least one spring rail. The at least one wiper strip is configured to be connectable to the at least one spring rail by means of the at least one spring rail receptacle. The dimensions of the at least one spring rail receptacle are adapted to the shape and size of the at least one spring rail. The wiper strip is advantageously connected to the spring rail in a form-fitting manner, in particular in a force-fitting manner.

The term "spring rail" is intended to mean, in particular, a macroscopic structural unit having at least one extension which is elastically deformable by at least 10%, in particular by at least 20%, preferably by at least 40%, and particularly advantageously by at least 50%, in the normal operating state and/or in the installed state, and which in particular generates a counter force which is dependent on and preferably proportional to a change in the extension and which opposes the change.

A "heating element" shall preferably mean an element which converts input energy, in particular electrical energy, into heat and is provided for discharging the heat to its surroundings and/or surrounding and/or adjacent components. The heating element is preferably arranged at the at least one first spring rail element, in particular at the at least one second spring rail element and/or at the wiper strip. The heating element is preferably provided for tempering, in particular, the at least one first spring rail element and/or the at least one second spring rail element and/or the wiper strip. The at least one heating element preferably extends over a substantial part of the extension length of the at least one wiper strip and/or of the spring rail, in particular over the entire extension length. The at least one heating element is preferably arranged on the side of the wiper blade adapter facing the wiper strip. The at least one heating element is preferably arranged such that its main extension is arranged at least substantially parallel to the main extension plane of the at least one first spring rail element and/or of the at least one second spring rail element. The "main plane of extension" of the object is intended to mean, in particular, a plane which is parallel to the largest outer surface of the smallest cuboid which also encompasses the object exactly completely and preferably extends through the geometric center of gravity of the cuboid. The at least one heating element preferably has at least one heating resistor. The at least one heating element has, for example, a heating conductor, which has, for example, heating filaments and/or heating films and/or, in particular, conductive heating ceramics and/or, in particular, conductive heating pastes. It is conceivable for the wiper blade device to have a plurality of heating elements, for example two, three, four, etc. The heating element is advantageously provided for tempering the at least one wiping lip to a temperature at which a wiping process can be carried out, in particular at which the flexibility of the wiping lip rubber is ensured, in particular optimized, for the wiping process. In particular, cleaning of vehicle windows can be accelerated and/or improved at outside temperatures below 0 ℃ and/or below the freezing point of water. The wiper blade device can fulfill at least one advantageous heating function by means of a heating element. Preferably, an electrical interface element is arranged on the wiper arm adapter for connection, in particular plug connection, to an electrical supply line. The at least one spring element preferably electrically conductively connects an electrical interface element at the wiper arm adapter to the at least one heating element. The spring element is preferably at least partially made of an electrically conductive metal. The spring element is preferably formed at the electrical interface element for the connection at the wiper arm adapter by injection molding, in particular injection molding, preferably by means of a coating technique and/or an injection molding technique such as multi-component injection molding. The spring element is preferably arranged in the region of the wiper blade adapter on the inside of the outer wall of the adapter connecting element. The spring element preferably extends from the wiper blade adapter in the direction of the heating element in the surrounding region of the bearing element. An advantageous electrical connection can be achieved which allows pivoting of the wiper blade adapter and/or pivoting of the wiper arm adapter relative to the wiper blade adapter. In particular, an advantageous connection, in particular a plug-in connection, for supplying current can be achieved, which is designed independently of the pivot position of the wiper blade adapter, in particular of the adapter connecting element, relative to the base element. It is achieved that only a plug connection has to be established between the wiper arm and the wiper arm adapter in order to supply the heating element with electrical energy. The heating element is in particular designed as a film-like electrical heating device, which is provided in particular for heating the spring rail and/or the wiper strip and is preferably glued at least to the first spring rail element and/or at least to the second spring rail element. In the mounted state, the heating element is arranged in part at least one bridge element of the set of bridge elements. The heating element can advantageously be of one-piece construction and arranged partially at a plurality of bridge elements of the set of bridge elements. The heating element is particularly advantageously arranged partially at the bridge elements of the bridge element group and mostly at the at least one first spring rail element and/or at the at least one second spring rail element.

The "mounted state" is intended in this context to mean, in particular, a state in which the wiper blade device is ready for a wiping operation and/or a wiping operation. In particular, the wiper blade device is arranged in the mounted state at and/or coupled to the wiper arm, wherein in particular a mechanical, electrical and/or fluidic coupling is present between the wiper arm and the wiper blade device. The at least one first spring rail element and/or the at least one second spring rail element are preferably at least partially made of metal. Alternatively or additionally, it is conceivable for the spring rail element to be formed at least partially from plastic, from a composite material or from other materials which are considered reasonable by the skilled person. The spring rail element is preferably at least partially made of spring steel. The spring rail preferably has at least substantially the shape of a bent rod in the unloaded state and particularly advantageously the shape of a flattened bent rod. The spring rail can be of one-piece construction or of multiple parts. The curvature of the spring rail along the spring rail in the unloaded state is preferably greater than the curvature of a vehicle window surface of the motor vehicle, in particular of a vehicle window pane, on which the spring rail is guided in at least one operating state and/or in the installed state.

A "set of bridge elements" shall advantageously mean a set of bridge elements which may have, for example, one bridge element, in particular at least two bridge elements and preferably at least three bridge elements. A "bridge element" is intended to mean, in particular, an element of the spring rail which is provided to connect at least a first spring rail element to at least a second spring rail element. The bridge element has in particular an extent along the longitudinal extent of the spring rail, which is in particular significantly smaller than the respective longitudinal extent of the spring rail. The longitudinal extent of the bridge element is in particular parallel to the longitudinal extent of the spring rail. The longitudinal extent of the bridge element is, for example, at most 40%, advantageously at most 30%, particularly advantageously at most 20%, preferably at most 10% and particularly preferably at most 5% of the longitudinal extent of the spring rail. The bridge member may, for example, be formed at least substantially of the same material as the heating element. The bridge element can be configured, for example, as a membrane. The bridge element advantageously has at least one adhesive surface. The bridge element may alternatively or additionally be welded, in particular, to the first spring rail element and/or the second spring rail element. The bridge element can be particularly advantageously formed in one piece, in particular with the first spring rail element and/or in particular with the second spring rail element.

The design of the wiper blade device according to the invention makes it possible in particular to achieve improved properties with respect to heating. An advantageous heating of the wiper blade adapter can be achieved in particular. Improved heating properties, in particular in the region of the wiper blade adapter and/or of the end cap, can advantageously be achieved. It may be particularly advantageous to provide a wiper blade device with improved properties that are suitable in winter. This ensures, in particular, that the cleaning water does not freeze and/or can be thawed in the possibly water-conducting portion.

It is further proposed that the wiper blade device has a wiper blade adapter, at which at least one wiper arm adapter is arranged for connecting the wiper blade to the wiper arm, wherein the wiper blade adapter has at least one base element that can be arranged at the wiper strip and/or at least at the spring rails of the wiper blade, wherein at least one bridge element of a bridge element set, more precisely in particular at least one bridge element of a bridge element set, which is provided with a heating element, is arranged in the region of the wiper blade adapter. With this configuration, the wiper blade adapter can be heated cost-effectively. In particular, the heating of the wiper blade adapter can be increased cost-effectively. A "wiper blade adapter" is to be understood in this context to mean, in particular, an adapter which has a contact region with a wiper blade component and is connected thereto without being lost, and which is provided for forming, at a surface to be cleaned, in particular a vehicle window, a coupling region of the wiper blade component for coupling and/or contacting a component, in particular a wiper arm adapter. The wiper blade adapter and the wiper arm adapter preferably allow the wiper blade device to be connected to a vehicle, in particular to a wiper arm of a vehicle. A "wiper arm adapter" is to be understood in this context to mean, in particular, an adapter which can be connected, in particular without being lost, to a wiper arm component and which is provided for connecting, in particular without being lost, a wiper blade device, in particular a wiper blade adapter, to a wiper arm. The wiper blade device can be connected to a wiper arm of a vehicle, in particular of a vehicle, by means of a wiper arm adapter and a wiper blade adapter.

It is also proposed that the wiper blade device has at least one end cap, wherein at least one bridge element of the set of bridge elements, more precisely in particular at least one bridge element of the set of bridge elements, which is provided with a heating element, is arranged in the region of the end cap. The term "end cap" is intended to mean, in particular, a covering element which is provided, in particular, at least to cover a free end and, in particular, an end region of the wiper strip. The end cap is provided, in particular, together with the wiper strip and/or the spring rail for plug-in mounting. At least one end cap is arranged in the mounted state at an end region of the at least one wiper strip. The wiper blade device preferably has at least two end caps. At least two end caps are arranged in the surroundings of the opposite end regions of the wiper strip, in particular in the main direction of extension. At least one bridge element is preferably arranged at each of the opposite end caps. An elongation of the heating element or an enlargement of the heating surface of the heating element can advantageously be achieved. An advantageous heating of the end cap can be achieved particularly advantageously by this configuration.

The heating element may for example have a heating conductor with a rectilinear shape and/or any other shape deemed reasonable by the person skilled in the art. An advantageous dissipation of energy, in particular of heat, can be achieved when the heating element has at least one heating conductor with a plurality of corrugations. "heating conductor with a plurality of corrugations" is intended to mean, in particular, a heating conductor which is designed, for example, as a heating wire with a plurality of adjacent coils. The corrugations may for example have an at least substantially rectangular shape. The corrugation alternatives may have an at least substantially angular and/or rounded shape. The corrugations are advantageously arranged at least substantially in one plane, viewed in the direction of conduction of the heating conductor. The heating conductor is in particular of material-homogeneous design.

It is further proposed that the corrugations, as viewed in the longitudinal extension of the spring rail, are distributed at least substantially identically in the region of the bridge elements of the bridge element group and in at least one region outside the bridge elements of the bridge element group. It can thus be advantageously understood that the plurality of corrugations have at least substantially the same distance from one another in the region of the bridge elements of the bridge element group, as viewed along the longitudinal extent of the spring rail. This makes it possible in particular to achieve a uniform heat transfer in the region of the bridge elements of the bridge element group. The term "longitudinal extent" of the object is intended here to mean, in particular, an extent which is parallel to the longest edge of the smallest imaginary cuboid which also completely surrounds the object.

It is also proposed that the corrugations be distributed substantially uniformly along the entire longitudinal extent of the spring rail. In particular, this means that the plurality of corrugations have at least substantially the same distance from one another, as viewed along the entire longitudinal extent of the spring rail. Advantageously, this design makes it possible to better heat the wiper strip and/or the wiper arm adapter and/or the end cap.

It is furthermore proposed that the corrugation, viewed in the longitudinal direction of the spring rail, in each case comprises a greater length of the heating conductor in the region of the bridge elements of the bridge element group than in at least one region outside the bridge elements of the bridge element group. The corrugation advantageously comprises a greater heating conductor length extending in the transverse direction of the spring rail in the region of the bridge elements of the bridge element group than in at least one region outside the bridge elements of the bridge element group, while the heating conductor length extending in the longitudinal direction of the spring rail is the same. The heating power in the region of the bridge element can thereby be improved. The term "transverse extent" of the object is intended here to mean, in particular, an extent which is perpendicular to the longest edge of the smallest geometrical cuboid which also completely surrounds the object.

It is further proposed that the spring rail has at least one second electrical heating element, which is provided to heat at least the second spring rail element. The mounting of the first spring rail element and/or the second spring rail element can thereby be simplified.

The second heating element may, for example, be constructed similarly to the first heating element. The heating conductor of the second heating element may alternatively or additionally be constructed in one piece with the heating conductor of the first heating element. It is proposed that the second heating element has a second heating conductor with a plurality of second corrugations which are at least substantially uniformly distributed, as viewed in the longitudinal extension of the spring rail. The mounting of the wiper blade device can thereby be simplified.

It is furthermore proposed that the second corrugation, as viewed in the longitudinal extension of the spring rail, respectively comprises a heating conductor length that is at least substantially as large. The second corrugations are in particular as large as one another. The corrugations advantageously comprise heating conductor lengths which are each as long as one another in the transverse direction of the spring rail and/or in the longitudinal direction of the spring rail. A uniform heating power can thereby be achieved. A cost-effective manufacturability of the second corrugation can advantageously be achieved by this design.

The set of bridge elements may, for example, comprise only heated bridge elements. The set of bridge elements advantageously has at least one unheated bridge element. The mounting of the wiper blade device can thereby be simplified. This makes it possible to reduce the production costs of the wiper blade device. The bridge element group advantageously has a plurality of unheated bridge elements. The bridge element is not heated, in particular, in that the at least one unheated bridge element is arranged outside the heating region of the first heating element and/or of the second heating element.

A method for operating a wiper blade device having at least one spring rail having at least one first spring rail element, at least one second spring rail element and at least one bridge element which connects the first spring rail element to the second spring rail element and which is heated is also proposed. This makes it possible to cost-effectively increase comfort in particular.

The wiper blade device and the method according to the invention should not be limited to the above-described applications and embodiments. In particular, the wiper blade device according to the invention can have a number of individual elements, components and units and method steps different from the number described here in order to implement the operating modes described here. Furthermore, in the value fields described in the present disclosure, values within the limits should also be regarded as being public and disposable.

Drawings

Further advantages arise from the following description of the figures. Embodiments of the invention are shown in the drawings. The figures, description and claims contain a large number of combined features. The person skilled in the art can also expediently observe the features individually and generalize them to reasonable further combinations.

In the drawings:

fig. 1 is a schematic view of a wiper blade with a wiper blade device in a state of being mounted at a vehicle;

fig. 2 shows a representation of a wiper blade with a cross section of a wiper blade adapter in a plan view;

fig. 3 shows a representation of a section of a wiper blade device with spring rails and bridge elements in a plan view;

fig. 4 shows a partially cut-away sectional illustration of a wiper blade device with a first spring rail element of a spring rail and a second spring rail element of a spring rail in a plan view; and is

Fig. 5 shows a flowchart of a method for operating a wiper blade device.

Detailed Description

In fig. 1, a windshield wiper 10 is shown as part of a motor vehicle 11. The motor vehicle 11 has a glass 22, in particular a windshield, wherein the windshield wiper 10 is provided for cleaning the glass 22. It is also conceivable, however, for the windshield wiper 10 to be provided for cleaning other windows of the motor vehicle 11. The windshield wiper 10 comprises a wiper blade device 12 having a wiper blade 14 with a wiper blade adapter 16 and having a wiper arm 18 with a wiper arm adapter 20. The wiper blade device 12 is rotatably supported, in particular by the wiper arm 18, at an outer edge of the pane 22. The wiper arm 18 is arranged in the motor vehicle 11 without being lost. The wiper blade 14 has a contact area with the glass 22. The wiper blade 14 is preferably provided for connection to the wiper arm 18 and/or a wiper arm adapter 20 of the wiper arm 18. The wiper arm adapter 20 has a contact area with the wiper arm 18 and is connected to the wiper arm 18. The wiper arm adapter 20 is preferably provided to provide a coupling region of the wiper arm 18 for coupling and/or contacting the wiper blade adapter 16.

The wiper blade 14 has a wiper strip 24, which can comprise a channel element for guiding a fluid, which channel element is not shown in fig. 1. The wiper blade 14 has end caps 38 at both ends along a longitudinal extension 44 of the wiper blade 14 (see also fig. 2).

The wiper blade device 12 has a wiper blade adapter 16 (see fig. 3). In order to connect the wiper blade 14 to the wiper arm 18, a wiper arm adapter 20 can be arranged on the wiper blade adapter 16 (see fig. 1 and 3). The wiper blade device 12 has a spring rail 28. The wiper blade adapter 16 has a base element 36 that can be arranged on the wiper strip 24 and/or at least on the spring rail 28.

The spring rail 28 has a first spring rail element 30 and a second spring rail element 32. The first spring rail member 30 and the second spring rail member 32 are formed of spring steel. In addition, the spring rail 28 has a set of bridge elements. The set of bridge elements has some of the heated bridge elements 26 and/or some of the unheated bridge elements 52. The

bridge members

26, 52 connect the first spring rail member 30 with the second spring rail member 32, respectively. The bridge elements 26 of the bridge element group are arranged in the region of the wiper blade adapter 16. One bridge element 26 of the bridge element groups is arranged in the region of the end cap 38.

The spring rail 28 has an electrical heating element 34. The heating element 34 is provided for heating the first spring rail element 30. The heating elements 34 are arranged partially at the bridge elements 26 of the bridge element group. The heating element 34 has a heating conductor 40 with a plurality of corrugations 42. The heating conductor is designed as a heating wire, in particular a heating wire made of a copper-containing material.

The corrugations 42 are distributed, as viewed along the longitudinal extent 44 of the spring rail 28, in the region of the bridge elements 26 of the bridge element group and in at least one region outside the bridge elements 26 of the bridge element group. The corrugations 42 have a constant distance from one another, as viewed in the longitudinal extension 44, in the region of the bridge elements 26 of the bridge element group and in the region outside the bridge elements of the bridge element group.

In the example shown, the corrugations 42 are evenly distributed along the entire longitudinal extension 44 of the spring rail 28. That is to say that the corrugations 42 have a constant spacing from one another along the entire longitudinal extension 44.

The corrugations 42 each comprise a greater heating conductor length in the region of the bridge elements 26 of the bridge element group than in the region outside the bridge elements 26 of the bridge element group, as viewed along the longitudinal extension 44 of the spring rail 28. The corrugations 42 have in the example shown the same dimensions as one another in the region of the bridge elements 26 of the bridge element group and in the region outside the bridge elements 26 of the bridge element group along the longitudinal extension 44. The corrugation 42 in the example shown has a greater heating conductor length oriented perpendicular to the longitudinal extension 44 in the region of the bridge elements 26 of the bridge element group than in the region outside the bridge elements 26 of the bridge element group.

The spring rail 28 has an electrical second heating element 46. The second heating element 46 is provided for heating the second spring rail element 32. The second heating element 46 has a second heating conductor 48. The second heating conductor 48 is designed as a heating wire, in particular a heating wire made of a copper-containing material. The second heating conductor 48 may be similarly constructed as the heating conductor 40. The second heating conductor 48 has a plurality of second corrugations 50. The second corrugations 50 are substantially evenly distributed, as viewed along the longitudinal extension 44 of the spring rail 28. The second corrugations 50 each have a heating conductor length which is substantially as large as viewed in the illustrated example along the longitudinal extent 44 of the spring tube 28.

In addition, the bridge element group has two unheated bridge elements 52. An unheated bridge element 52 is arranged between two bridge elements 26 extending in the longitudinal direction.

Fig. 5 shows a method for operating the wiper blade device 12. The method comprises at least one first method step 54 and a further method step 56.

In a first method step 54, the wiper blade device 12 is provided with at least one spring rail 28 having at least one first spring rail element 30, at least one second spring rail element 32 and at least one bridge element 26, which connects the first spring rail element 30 to the second spring rail element 32. In a second method step 56, at least one bridge element 26 is heated. The heating element 36 is supplied with electrical energy and operates with electrical energy, among other things.

Claims

1. Wiper blade device (12) having a spring rail (28) with at least one first spring rail element (30), at least one second spring rail element (32), at least one set of bridge elements each connecting the first spring rail element (30) to the second spring rail element (32), and at least one electrical heating element (34) at least for heating the first spring rail element (30), wherein the heating element (34) is arranged at least partially at least one bridge element (26) of the set of bridge elements.

2. Wiper blade device (12) according to claim 1, characterized by a wiper blade adapter (16) at which at least one wiper arm adapter (20) can be arranged for connecting the wiper blade (14) to the wiper arm (18), wherein the wiper blade adapter (16) has at least one base element (36) which can be arranged at the wiper strip (24) and/or at least one spring rail (28) of the wiper blade (14), wherein at least one bridge element (26) of the set of bridge elements is arranged in the region of the wiper blade adapter (16).

3. Wiper blade device (12) according to claim 1 or 2, characterized by at least one end cap (38), wherein at least one bridge element (26) of the set of bridge elements is arranged in the region of the end cap (38).

4. Wiper blade device (12) according to any one of the preceding claims, characterized in that the heating element (34) has at least one heating conductor (40) with a plurality of corrugations (42).

5. Wiper blade device (12) according to claim 4, characterized in that the corrugations (42) are distributed, as viewed along the longitudinal extension (44) of the spring rail (28), at least substantially identically in the region of the bridge elements (26) of the bridge element groups as in at least one region outside the bridge elements (26) of the bridge element groups.

6. Wiper blade device (12) according to claim 5, characterized in that the corrugations (42) are arranged at least substantially uniformly along the entire longitudinal extension (44) of the spring rail (28).

7. Wiper blade device (12) according to one of claims 4 to 6, characterized in that the corrugations (42) each comprise a greater heating conductor length in the region of the bridge elements (26) of the bridge element group than in at least one region outside the bridge elements (26) of the bridge element group, as viewed along the longitudinal extension (44) of the spring rail (28).

8. Wiper blade device (12) according to one of the preceding claims, characterized in that the spring rail (28) has at least one electrical second heating element (46) at least for heating the second spring rail element (32).

9. Wiper blade device (12) according to claim 8, characterized in that the second heating element (46) has at least one second heating conductor (48) with a plurality of second corrugations (50) which are at least substantially evenly distributed, viewed along the longitudinal extension (44) of the spring rail (28).

10. Wiper blade device (12) according to claim 8 or 9, characterized in that the second corrugation (50) comprises a heating conductor length, viewed in the longitudinal extension (44) of the spring rail (28), respectively, which is at least substantially as large.

11. Wiper blade device (12) according to one of the preceding claims, characterized in that the set of bridge elements has at least one unheated bridge element (52).

12. Wiper blade (14) with at least one wiper blade device (12) according to one of the preceding claims.

13. Method for operating a wiper blade device (12), in particular according to one of claims 1 to 11, with at least one spring rail (28) having at least one first spring rail element (30), at least one second spring rail element (32) and at least one bridge element (26) which connects the first spring rail element (30) to the second spring rail element (32) and is heated.