Wiper blade device

Abstract

Wiper blade device with at least one wiper blade adapter (22a; 22b; 22c; 22d) provided for coupling with a wiper arm (18a), with at least one spring rail (34a; 34b; 34c; 34d), and with at least one wiper strip unit (24a; 24b; 24c; 24d) which has a wiper lip (30a; 30d) for wiping a vehicle window (14a), a receiving area (38a; 38b; 38c; 38d) for the wiper blade adapter (22a; 22b; 22c; 22d) and at least one spring rail (36a; 36b; 36c; 36d) for receiving the at least one spring rail (34a; 34b; 34c; 34d), wherein the wiper blade adapter (22a; 22b; 22c; 22d) materially bonded and / or form-fitting with the wiper strip unit (24a; 24b; 24c;24d) is connected, characterized in that the spring rail channel (36b) for positive locking connection of the spring rail (34b) to the wiper strip unit (22b) is closed at its ends and the wiper blade adapter (22d) has at least two piercing elements (60d, 62d) which are oriented in opposite longitudinal directions.

Description

State of the art

[0001] A wiper blade device has already been proposed, comprising at least one wiper blade adapter designed for coupling with a wiper arm, at least one spring rail, and at least one wiper strip unit, which includes a wiper lip for wiping a vehicle windshield, a receiving area for the wiper blade adapter, and at least one spring rail channel for receiving the at least one spring rail. Further prior art is known from WO 2004 / 045927 A1 and FR 3 027 268 A1. Disclosure of the invention

[0002] The invention relates to a wiper blade device with at least one wiper blade adapter which is provided for coupling with a wiper arm, with at least one spring rail, and with at least one wiper strip unit which has a wiper lip for wiping a vehicle window, a receiving area for the wiper blade adapter and at least one spring rail channel for receiving the at least one spring rail.

[0003] It is proposed that the wiper blade adapter be connected to the wiper strip assembly by a material-bonded and / or form-fit connection. The inventive design of the wiper blade device allows the wiper blade adapter to be connected to the wiper strip assembly particularly advantageously. A "wiper blade device" is understood to be, in particular, a device that forms at least part of a wiper blade and preferably the entire wiper blade. A "wiper blade" is understood to be, in particular, a component consisting preferably of several elements, comprising at least one wiper strip with a wiping lip designed to rest on a vehicle windshield to be wiped in a mounted state and to be moved across the windshield to be wiped by a drive mechanism via the wiper arm.In this context, a "wiper arm" is understood to be, in particular, an elongated element of a wiping device connected at one end to a wiper motor, which transmits a wiping movement from the wiper motor to a wiper blade attached to the end opposite the end connected to the wiper motor. A "wiper blade adapter" in this context is understood to be, in particular, an adapter that has a contact area with a wiper blade component, especially the spring rail, and is captively connected to the wiper blade component in a mounted state, and is designed to provide a coupling area of ​​the wiper blade component for coupling and / or contact with a wiper arm adapter.In this context, a "wiper arm adapter" is understood to mean, in particular, an adapter that has a contact area for a wiper arm component and is captively connected to the wiper arm component, and is designed to provide a coupling area of ​​the wiper arm component for coupling and / or contact with a wiper blade adapter. A "spring rail" is understood to mean, in particular, a macroscopic element that has at least an extent which, in a normal operating state, is elastically variable by at least 10%, in particular by at least 20%, preferably by at least 30%, and most advantageously by at least 50%, and which, in particular, generates a counterforce that is dependent on and preferably proportional to a change in extent and that opposes the change. Preferably, the spring rail is made at least partially of spring steel.Preferably, in an unloaded state, the spring rail has essentially the shape of a bent rod, and particularly advantageously, a flattened bent rod. Furthermore, it is advantageous for the spring rail to be formed in one piece. Alternatively, the spring rail can also be formed in multiple parts. It is particularly advantageous for the curvature of the spring rail along its length in an unloaded state to be greater than the curvature of a vehicle surface, in particular a vehicle window, over which the spring rail is guided in at least one operating state. An "elastic object" is understood to mean, in particular, an object that can be repeatedly deformed without being mechanically damaged or destroyed, and which, in particular, tends to return to its original shape on its own after deformation.In this context, a "spring rail channel" is understood to mean, in particular, a channel designed to accommodate the spring rail. Preferably, the spring rail channel is arranged in the at least one retaining strip. In this context, a "wiper strip unit" is understood to mean, in particular, a unit comprising at least one wind deflector element, at least one retaining strip, and at least one wiper lip, which are formed integrally. Preferably, the at least one wind deflector element, the at least one retaining strip, and the at least one wiper lip are manufactured together by an extrusion process. The wiper strip unit is designed, in particular, to accommodate the spring rail at least partially, in particular at least to a large extent, and most preferably completely in the circumferential direction.In this context, "at least a large part" shall be understood to mean more than 50%, preferably more than 80%, and particularly preferably more than 95%. The wiper blade assembly forms, in particular, at least partially, preferably at least a large part, and particularly preferably completely, a receiving area for the wiper blade adapter. In this context, a "wiper blade" shall be understood to mean, in particular, a strip designed to wipe a vehicle windshield. Preferably, the wiper blade is made of a rubber material. A "receiving area for the wiper blade adapter" shall be understood to mean, in particular, an area and / or section of the wiper blade assembly designed, in particular, to receive the wiper blade adapter, at least partially. Preferably, the receiving area is at least free of a wind deflector element.The term "intended" is understood to mean, in particular, specially designed and / or equipped. The fact that an object is intended for a specific function is understood to mean, in particular, that the object fulfills and / or performs this specific function in at least one application and / or operating state. The term "materially bonded" is understood to mean, in particular, that the components are held together by atomic or molecular forces, such as in soldering, welding, bonding, and / or vulcanizing. The term "form-fit" is understood to mean, in particular, that adjacent surfaces of components joined in a form-fit manner exert a holding force on each other in the normal direction of the surfaces. Specifically, the components are in geometric engagement with one another.

[0004] It is further proposed that the wiper strip unit be directly coupled to the spring rail. This allows for a particularly advantageous connection between the spring rail and the wiper strip unit. "Directly coupled" is understood to mean, in particular, that two elements, such as the wiper strip unit and the spring rail, are directly connected to one another; that is, that a positive-locking connection or a material-locking connection takes place directly between the two elements, whereby, in the case of a material-locking connection, for example, an adhesive is placed between the two elements to be joined. The two directly coupled elements do not, in particular, have any connecting element arranged between them, such as an end cap connecting the wiper strip unit to the spring rail.

[0005] Furthermore, it is proposed that the wiper blade unit be directly connected to the spring rail at its longitudinal end regions. This allows for a particularly simple connection between the spring rail and the wiper blade unit. A "longitudinal end region" is understood to mean, in particular, the ends located in a principal direction of extension of the wiper blade unit. A longitudinal direction corresponds to the principal direction of extension of the wiper blade unit. A "principal direction of extension" of an object is understood to mean, in particular, a direction that runs parallel to the longest edge of the smallest imaginary geometric cuboid that just encloses the object.

[0006] Furthermore, it is proposed that the wiper strip unit be positively connected to the spring rail. This allows the spring rail to be fixed in the wiper strip unit particularly easily.

[0007] It is further proposed that the spring rail form at least one hook element via which it is positively coupled to the wiper blade unit. This allows the spring rail to be advantageously connected to the wiper blade unit. "At least one hook element" is understood to mean, in particular, a positive-locking element that engages positively with a corresponding positive-locking element. The spring rail has several hook elements arranged side by side on each of its opposite outer edges. The hook elements are preferably designed as notches in the spring rail, which are formed, in particular, by deforming the spring rail.

[0008] According to the invention, the spring rail channel for the positive-locking connection of the spring rail to the wiper strip unit is closed at its ends. This allows the spring rail to be fixed in the spring rail channel particularly easily, thus facilitating its connection to the wiper strip unit. An "end of the spring rail channel" is understood to mean, in particular, an end located in the main extension direction of the wiper strip unit, at which the spring rail channel is open, at least in a pre-assembled state, so that the spring rail can be inserted into the spring rail channel. "Closed" is understood to mean, in particular, sealing by means of an additional element and / or an additional material. It is conceivable that the spring rail channel is closed by the application of an adhesive, a hardening plastic, or by bonding in an additional element.

[0009] It is further proposed that the wiper blade adapter should have at least one piercing element designed to create a positive-locking connection, which is inserted into the wiper strip assembly. This allows for particularly easy fixation of the wiper blade adapter in the longitudinal direction to the wiper strip assembly. A "piercing element" is understood to be, in particular, a positive-locking element that has at least one point designed to penetrate another element, such as the wiper strip assembly, in order to establish a positive-locking connection with it.

[0010] The piercing element preferably pierces a hole in the wiper strip unit and is then arranged in this hole in a form-fitting manner.

[0011] According to the invention, the wiper blade adapter has at least two piercing elements that are oriented in opposite longitudinal directions. This makes it particularly easy to fix the wiper blade adapter to the wiper assembly in both longitudinal directions.

[0012] The wiper blade device according to the invention is not intended to be limited to the application and embodiment described above. In particular, the wiper blade device according to the invention may, in order to fulfill a function described herein, have a different number of individual elements, components and units than the number mentioned herein. Drawings

[0013] Further advantages become apparent from the following description of the drawings. The drawings illustrate four exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0014] They show: Fig. 1 a motor vehicle with a wiping device comprising a wiper blade device according to the invention, Fig. 2 a sectional view through a wiper blade device in a first embodiment, Fig. 3 a schematic view from below of a wiper blade device according to the invention in a second embodiment, Fig. 4 a schematic view from below of a wiper blade device according to the invention in a third embodiment and Fig. 5 a sectional view through a wiper blade device according to the invention in a fourth embodiment. Description of the exemplary implementations

[0015] In the Fig. 1 and Fig. Figure 2 shows a wiper blade device in a first embodiment. Fig. Figure 1 schematically shows a motor vehicle 10a with a wiper device 12a for a vehicle windshield 14a. In the Fig. Figure 1 shows two wiper blades 16a, which have the wiper blade assembly, and two wiper arms 18a, of which only one will be described in detail. The wiper blades 16a and the wiper arms 18a are essentially identical in design, so one description applies to both. The wiper arm 18a has a wiper arm adapter 20a. The wiper arm adapter 20a is designed in a manner known to those skilled in the art, such as a top-lock adapter or a side-lock adapter. The wiper arm 18a is designed for attachment to a drive shaft of the wiper assembly 12a. The drive shaft is designed to rotate in an oscillating manner by a drive motor (not shown). The wiper blade assembly has a wiper blade adapter 22a. The wiper blade adapter 22a is designed for coupling with the wiper arm adapter 20a, in particular by means of further components (not shown).The wiper blade adapter 22a is detachably connected to the wiper arm adapter 20a in a manner known to the expert.

[0016] The wiper blade assembly comprises a wiper strip unit 24a. The wiper strip unit 24a has end sections 26a and 28a at opposite free ends. The wiper blade assembly has two end caps (not shown). The end sections 26a and 28a of the wiper strip unit 24a receive the end caps. The end caps close off the wiper blade assembly in a longitudinal direction. The longitudinal direction runs parallel to a principal extension direction of the wiper blade assembly. The wiper strip unit 24a has a wiper lip 30a for wiping the vehicle windshield 14a. The wiper lip 30a is arranged over a large portion of the wiper strip unit 24a. The wiper lip 30a is made of rubber.

[0017] The wiper blade assembly 26a comprises a retaining strip 32a. The wiper lip 30a is formed integrally with the retaining strip 32a. The wiper blade assembly has a spring rail 34a. The spring rail 34a is arranged in the retaining strip 32a of the wiper blade assembly 24a. The wiper blade assembly 24a has a spring rail channel 36a that is at least substantially closed. The spring rail channel 36a is largely formed by the retaining strip 32a. The spring rail channel 36a is designed to receive the spring rail 34a of the wiper blade assembly. The spring rail channel 36a has a cross-section that is at least substantially rectangular. The spring rail 34a has an elongated, flattened shape. The spring rail 34a has a cross-section that is at least substantially rectangular. The spring rail 34a is gripped at its free ends. The spring rail 34a is made of spring steel. The spring rail 34a is formed in one piece.Alternatively or additionally, it is also conceivable that the spring rail 18a is multi-part, in particular consisting of two or more spring rail parts running side by side.

[0018] The wiper assembly 24a, when assembled, connects the spring rail 34a and the wiper blade adapter 22a. The wiper assembly 24a has a receiving area 38a for the wiper blade adapter 22a. The receiving area 38a has a support surface 40a that is at least substantially flat. The support surface 40a serves to position the wiper blade adapter 22a. The wiper blade adapter 22a is directly connected to the wiper assembly 24a. The wiper blade adapter 22a is bonded to the wiper assembly 24a by a material-fit connection. This ensures that the wiper blade adapter 22a is connected to the wiper assembly 24a without any play. In particular, the wiper blade adapter 22a is fixed in the longitudinal direction relative to the wiper assembly. The wiper blade adapter 22a is connected to the wiper assembly 24a without any additional adhesive.The wiper blade adapter 22a is bonded together by melting the wiper assembly 24a and the wiper blade adapter 22a, followed by cooling of both. For this purpose, the receiving area 38a of the wiper assembly 24a and the wiper blade adapter 22a are locally heated during an assembly step, causing the plastic from which the wiper blade adapter 22a and the wiper assembly 24a are formed to melt. The wiper blade adapter 22a is then positioned accordingly in the receiving area 38a of the wiper assembly 24a. Upon cooling, the molten areas fuse together, and the wiper blade adapter 22a is bonded to the wiper assembly 24a. In this process, a connecting layer 42a is formed between the wiper blade adapter 22a and the wiper strip unit 24a, in which the wiper blade adapter 22a and the wiper strip unit 24a are formed in one piece.The wiper blade adapter 22a is directly and physically connected to the wiper strip unit 24a.

[0019] Alternatively, instead of fusing, the wiper blade adapter 22a and the wiper strip unit 24a could be bonded together. For this purpose, an adhesive would be applied between the wiper blade adapter 22a and the wiper strip unit 24a, which, once cured, bonds the wiper strip unit 24a and the wiper blade adapter together. The bonding layer 42a is formed by the adhesive. The adhesive can be any type deemed suitable by an expert. Even with this connection method, the wiper blade adapter 22a would be directly and physically connected to the wiper strip unit 24a.

[0020] In the Fig. Figures 3 to 5 show three further embodiments of the invention. The following descriptions and drawings are essentially limited to the differences between the embodiments, whereby, with regard to identically designated components, particularly those with the same reference numerals, reference is also generally made to the drawings and / or the description of the other embodiments, especially those of the Fig. 1 and Fig. 2, reference can be made. To distinguish the embodiments, the letter a is the reference numeral of the embodiment in the Fig. 1 and Fig. 2. In the exemplary embodiments of the Fig. In letters 3 to 5, the letter a is replaced by the letters b to d.

[0021] The Fig. Figure 3 shows a wiper blade device in a second embodiment. In the Fig. Figure 3 shows the wiper blade device in a schematic sectional view from below, showing only a central area and the two end areas, with the areas in between not shown (see freehand line in Figure 3). Fig. 3) The wiper blade assembly is part of a wiper blade 16b. The wiper blade assembly includes a wiper blade adapter 22b. The wiper blade adapter 22b is designed for coupling with a wiper arm adapter.

[0022] The wiper blade assembly comprises a wiper strip unit 24b. The wiper strip unit 24b has end regions 26b and 28b at opposite free ends. The end regions 26b and 28b close off the wiper blade assembly in a longitudinal direction. The longitudinal direction runs parallel to a main extension direction of the wiper blade assembly. The wiper strip unit 24b has a wiper lip (not shown in detail here) for wiping the vehicle windshield. The wiper lip is arranged largely on the wiper strip unit 24b. The wiper strip unit 26b comprises a retaining strip 32b. The wiper blade assembly has a spring rail 34b. The spring rail 34b is arranged in the retaining strip 32b of the wiper strip unit 24b. The wiper strip unit 24b has a spring rail channel 36b that is at least substantially closed. The spring rail channel 36b is largely formed by the retaining strip 32b.The spring rail channel 36b is designed to receive the spring rail 34b of the wiper blade assembly. In its assembled state, the wiper strip unit 24b connects the spring rail 34b and the wiper blade adapter 22b. The wiper strip unit 24b has a receiving area 38b for the wiper blade adapter 22b.

[0023] The wiper blade adapter 22b is directly connected to the wiper strip unit 24b. In contrast to the previous embodiment, the wiper blade adapter 22b is positively connected to the wiper strip unit 24b. There is no material bond between the wiper strip unit 24b and the wiper blade adapter 22b.

[0024] The wiper blade assembly 24b has a first fixing recess 44b. The first fixing recess 44b is designed for securing the wiper blade adapter 22b. The fixing recess 44b is located in a central section of the wiper blade assembly 24b. The fixing recess 44b is located within the receiving area 38b. The fixing recess 44b is designed as a vertical recess. The fixing recess 44b has a cross-section that is at least substantially rectangular. Alternatively, the cross-section can have any shape, as long as it corresponds to the shape of a component associated with the fixing recess 44b. The fixing recess 44b extends along the spring rail channel 36b in a manner that is smaller than the extension of the receiving area 38b along the spring rail channel 36b.Furthermore, the extension of the fixing recess 44b along the spring rail channel 36b corresponds to less than 20% of the extension of the receiving area 38b along the spring rail channel 36b.

[0025] The wiper assembly 24b has a further fixing recess 46b. The further fixing recess 46b is designed for attaching the wiper blade adapter 22b. The further fixing recess 46b is at least substantially congruent with the fixing recess 44b. The further fixing recess 46b is arranged at the same height as the fixing recess 44b when viewed along the spring rail channel 36b. The fixing recess 44b and the further fixing recess 46b are arranged on opposite sides of the wiper assembly 24b. The wiper blade unit has two further fixing recesses 48b, 50b, which are arranged longitudinally spaced from the first two fixing recesses 44b, 46b, but are essentially equivalent to the first two fixing recesses 44b, 46b, and therefore will not be described further here.In principle, it would also be conceivable that the wiper blade unit 24b has a different number of fixing recesses 44b, 46b, 48b, 50b and / or a different orientation and shape of fixing recesses 44b, 46b, 48b, 50b.

[0026] The wiper blade adapter 22b engages in the fixing recesses 44b, 46b, 48b, 50b with form-fitting elements that correspond to the fixing recesses 44b, 46b, 48b, 50b. This creates a form-fitting connection between the wiper blade adapter 22b and the wiper strip unit 24b. Due to the connection of the wiper blade adapter 22b via the fixing recesses 44b, 46b, 48b, 50b, there is some longitudinal play, which means that the wiper blade adapter 22b could move slightly longitudinally towards the wiper strip unit.

[0027] To fix the spring rail 34b in the wiper strip unit 24b, the spring rail is directly connected to the wiper strip unit 22b in its longitudinal end regions 26b and 28b. The spring rail 34b is thus directly coupled to the wiper strip unit 22b. The wiper strip unit 22b is positively connected to the spring rail 34b. The spring rail 34b is enclosed in the spring rail channel 36b. For positive locking, the spring rail channel 36b is closed at its ends. The spring rail channel 36b is closed after the spring rail 34b is inserted into it. To do this, the spring rail is first inserted into the spring rail channel 36b in the retaining strip 32b of the wiper strip unit 22b. Then the spring rail channel 36b is closed at both ends by an additional element 52b, 54b.The additional element 52b, 54b is an adhesive that seals the spring rail channel 36b. After the spring rail 36b is inserted, the adhesive is injected into the openings of the spring rail channel, where, upon hardening, it forms the additional element 52b, 54b. This clamps the spring rail 36b longitudinally within the spring rail channel 36b. Due to the additional elements 52b, 54b, the spring rail 36b no longer has any play in the spring rail channel in the longitudinal direction. As a result, the spring rail 36b is positively locked in the spring rail channel both transversely and longitudinally. The additional elements can, in principle, also be designed in a different way that would be considered appropriate by a person skilled in the art.In particular, it is conceivable that the additional elements 52b, 54b are made of molten and then re-hardened plastic or rubber, or of a pre-formed element, for example made of plastic or silicone, which is inserted into the spring rail channel in a material-locking and / or form-locking manner.

[0028] The Fig. Figure 4 shows a wiper blade device in a third embodiment. In the Fig. Figure 4 shows the wiper blade device in a schematic sectional view from below, showing only a central area and the two end areas, with the areas in between not shown (see freehand line in Figure 4). Fig. 4) The wiper blade assembly is part of a wiper blade 16c. The wiper blade assembly includes a wiper blade adapter 22c. The wiper blade adapter 22c is designed for coupling with a wiper arm adapter. The wiper blade assembly is essentially identical in design to the wiper blade assembly from the second embodiment of the Fig. 3.

[0029] The wiper blade assembly comprises a wiper bar unit 24c. The wiper bar unit 24c has end regions 26c and 28c at opposite free ends. The end regions 26c and 28c close off the wiper blade assembly in a longitudinal direction. The longitudinal direction runs parallel to a principal extension direction of the wiper blade assembly. The wiper bar unit 26c comprises a retaining strip 32c. The wiper blade assembly has a spring rail 34c. The spring rail 34c is arranged in the retaining strip 32c of the wiper bar unit 24c. The wiper bar unit 24c has a spring rail channel 36c that is at least substantially closed. The spring rail channel 36c is largely formed by the retaining strip 32c. The spring rail channel 36c is designed to receive the spring rail 34c of the wiper blade assembly. The wiper rail unit 24c connects the spring rail 34c and the wiper blade adapter 22c when assembled.The wiper blade assembly 24c has a receiving area 38c for the wiper blade adapter 22c. The wiper blade adapter 22c is directly connected to the wiper blade assembly 24c. The wiper blade adapter 22c is positively connected to the wiper blade assembly 24c. The wiper blade assembly 24c has several fixing recesses 44c, 46c for positively connecting the wiper blade adapter 22c. The fixing recesses 44c, 46c are equivalent to those in the second embodiment. The wiper blade adapter 22c engages in the fixing recesses 44c, 46c with positive locking elements that correspond to the fixing recesses 44c, 46c. This results in a positive connection between the wiper blade adapter 22c and the wiper blade assembly 24c.

[0030] To fix the spring rail 34c in the wiper strip unit 24c, the spring rail is directly connected to the wiper strip unit 22c in its longitudinal end regions 26c, 28c. The spring rail 34c is thus directly coupled to the wiper strip unit 22c. The wiper strip unit 22c is positively connected to the spring rail 34c. For this positive connection with the wiper strip unit 22c, the spring rail 34c has several hook elements 56c, 58c in each of its end regions 26c, 28c. The hook elements 56c, 58c are arranged in the side regions of the spring rail 34c. The hook elements 56c, 58c are formed by the spring rail 34c. The hook elements 56c, 58c form sharp edges. For this purpose, the spring rail is reshaped accordingly at its lateral edges. The hook elements 56c, 58c, which form sharp edges, engage positively in a wall of the spring rail channel 36c.This means that the spring rail 34c is positively connected to the wiper strip unit 22c in the longitudinal end areas 26c, 28c via the hook elements 56c, 58c.

[0031] The Fig. Figure 5 shows a wiper blade device in a fourth embodiment. In the Fig. Figure 5 shows a schematic side sectional view of the wiper blade assembly, with only a central area depicted. The wiper blade assembly is part of a wiper blade 16d. The wiper blade assembly includes a wiper blade adapter 22d. The wiper blade adapter 22d is designed for coupling with a wiper arm adapter.

[0032] The wiper blade assembly comprises a wiper strip unit 24d. The wiper strip unit 24d has a wiper lip 30d for wiping the vehicle windshield. The wiper lip is largely attached to the wiper strip unit 24d. The wiper strip unit 26d comprises a retaining strip 32d. The wiper blade assembly has a spring rail 34d. The spring rail 34d is arranged in the retaining strip 32d of the wiper strip unit 24d. The wiper strip unit 24d has a spring rail channel 36d that is at least substantially closed. The spring rail channel 36d is largely formed by the retaining strip 32d. The spring rail channel 36d is designed to receive the spring rail 34d of the wiper blade assembly. In an assembled state, the wiper strip unit 24d connects the spring rail 34d and the wiper blade adapter 22d. The wiper bar unit 24d has a receiving area 38d for the wiper blade adapter 22d.

[0033] The wiper blade adapter 22d is directly connected to the wiper assembly 24d. In contrast to the previous embodiment, the wiper blade adapter 22d is positively connected to the wiper assembly 24d in a different manner. There is no material bond between the wiper assembly 24d and the wiper blade adapter 22d.

[0034] The wiper blade adapter 22d has two piercing elements 60d, 62d. The piercing elements 60d, 62d are arranged on the underside 64d of the wiper blade adapter 22d facing the wiper strip unit 24d. The piercing elements 60d, 62d are designed as points intended to penetrate the soft material of the wiper strip unit 24d during assembly, thus establishing a positive-locking contact with the wiper strip unit 24d. The piercing elements 60d, 62d penetrate a receiving area 38d of the wiper strip unit 24d into a contact surface 40d. The piercing elements 60d, 62d are spring-elastic and are elastically deformed during assembly, thereby exerting an additional spring force on the wiper strip unit 24d. The two piercing elements 60d, 62d are aligned in opposite longitudinal directions.This means that the first piercing element 60d fixes the wiper blade adapter 22d in the first longitudinal direction to the wiper strip unit and the second piercing element 62d fixes the wiper blade adapter 22d in the opposite longitudinal direction.

[0035] In principle, it is also conceivable that the wiper blade adapter 22d and the wiper strip unit 24d are additionally connected to each other via corresponding fixing recesses, as known from the previous embodiments.

Claims

[1] Wiper blade device comprising at least one wiper blade adapter (22a; 22b; 22c; 22d) for coupling with a wiper arm (18a), comprising at least one spring rail (34a; 34b; 34c; 34d), and comprising at least one wiper strip unit (24a; 24b; 24c; 24d) comprising a wiper lip (30a; 30d) for wiping a vehicle window (14a), a receiving area (38a; 38b; 38c; 38d) for the wiper blade adapter (22a; 22b; 22c; 22d) and at least one spring rail (36a; 36b; 36c; 36d) for receiving the at least one spring rail (34a; 34b; 34c; 34d), wherein the wiper blade adapter (22a; 22b; 22c; 22d) is connected to the wiper strip unit (24a; 24b; 24c; 24d) in a material-bonded and / or form-bonded manner, characterized by, that the spring rail channel (36b) for the positive locking connection of the spring rail (34b) to the wiper strip unit (22b) is closed at its ends and the wiper blade adapter (22d) has at least two piercing elements (60d, 62d) which are oriented in opposite longitudinal directions. [2] Wiper blade device according to claim 1, characterized by , that the wiper strip unit (24b; 24c) is directly coupled to the spring rail (34b; 34c). [3] Wiper blade device according to claim 1 or 2, characterized by , that the wiper strip unit (24b; 24c) is directly connected to the spring rail (34b; 34c) in its longitudinal end regions (26b, 28b; 26c, 28c). [4] Wiper blade device according to any one of the preceding claims, characterized by , that the wiper strip unit (24b; 24c) is positively connected to the spring rail (34b; 34c). [5] Wiper blade device according to any one of the preceding claims, characterized by, that the spring rail (34c) forms at least one hook element (56c, 58c) via which the spring rail (34c) is positively coupled to the wiper strip unit (22c). [6] Wiper blade device according to any one of the preceding claims, characterized by , that the wiper blade adapter (22d) has at least one piercing element (60d, 62d) which is intended to be inserted into the wiper strip unit (24d) to create a positive connection. [7] Wiper blade with a wiper blade device according to one of the preceding claims.

Images