Accessory for wiper arm, wiper arm, wiper, method and system

Abstract

The invention relates to an accessory (1) for a wiper arm (20), a wiper arm (20), a wiper (23), a method and a system, wherein the wiper arm (20) has a rod-shaped arm (7), wherein the accessory (1) has a fluid channel for conveying a fluid and a first shape-stabilizing element (2), wherein a first fluid channel portion (3) is provided in the first shape-stabilizing element (2); and the accessory (1) has a second shape-stabilizing element (4), wherein a second fluid channel portion is provided in the second shape-stabilizing element (4).

Description

Technical Field

[0001] The present invention relates to an accessory for a wiper arm, a wiper arm, a wiper, a method and a system. Background Art

[0002] Attachments of this type according to the prior art are mostly either dimensionally stable or flexible. The disadvantage of dimensionally stable attachments is that they cannot be adjusted to the shape of the lever arm. This is particularly problematic for attachments that move on the lever arm. In many cases, if the lever arm is angular or curved, the attachment cannot be inserted over the entire length of the lever arm. Flexible attachments, on the other hand, have the disadvantage that they can change shape, which can impair important wiper functions. For example, the direction of the fluid outflow can change, or the position of the channel connection point can shift. Summary of the Invention

[0003] The object of the present invention is therefore to provide an attachment of the generic type which can be better adapted to the shapes of different lever arms and at the same time also allows secure positioning.

[0004] The object of the present invention is achieved by an attachment for a wiper arm of a vehicle windshield wiper, a wiper and a wiper arm comprising the attachment, and a system comprising the attachment, the wiper, and the wiper arm.

[0005] The basic idea of ​​the present invention is to use an attachment having a first dimensionally stable element, a second dimensionally stable element, and a flexible element. These dimensionally stable elements can form parts of the attachment that are particularly useful for secure positioning. The dimensionally stable element is at least partially covered by a flexible element, which, due to its flexibility, is particularly suitable for adapting to the shape of the dimensionally stable element and the rod-shaped arm. The flexible element can cover areas of the rod-shaped arm that conventional attachments cannot cover, in particular when the rod-shaped arm has an angled or curved shape. Furthermore, the flexible element, through this covering, forms at least a portion of the outer surface of the attachment. This surface can be designed to take into account, in particular, aerodynamic requirements, but also aesthetic requirements.

[0006] The attachment has a fluid channel. Within the meaning of the present invention, the term "fluid channel" should be understood as a fluid channel provided by the attachment. This fluid channel is used to conduct a fluid through the attachment. In this case, the fluid is particularly delivered to a nozzle that can spray the fluid onto a vehicle window. In this case, the fluid particularly flows through the entire fluid channel of the attachment. In this case, the fluid is particularly a liquid that can be used to clean the vehicle window.

[0007] In the sense of the present invention, the term "fluid channel portion" should be understood as a part of the fluid channel that the accessory has. This is true for the fluid channel portion formed in the first shape-stabilizing element (first fluid channel portion), the fluid channel portion formed in the second shape-stabilizing element (second fluid channel portion) and the fluid channel portion formed in the flexible component (third fluid channel portion). Preferably, the first fluid channel portion and the connecting portion of the first shape-stabilizing element are formed integrally. For example, they can be made integrally by injection molding. Particularly preferably, the first fluid channel portion has a fixed position relative to the connecting portion of the first shape-stabilizing element. As a result, a part of the fluid channel portion, such as the fluid outlet, has a constant orientation relative to the connecting portion. Preferably, the second fluid channel portion and the connecting portion of the second shape-stabilizing element are formed integrally. For example, they can be made integrally by injection molding. Particularly preferably, the second fluid channel portion has a fixed position relative to the connecting portion of the second shape-stabilizing element. As a result, a component of the fluid channel portion, such as the fluid outlet, has a constant orientation relative to the connecting portion.

[0008] Preferably, the fluid channel is composed of only the first, second and third fluid channel parts. Alternatively, it is also conceivable that the fluid channel also has other parts. Other parts can be, for example, segments that provide fluid communication between the fluid channel parts. An example of this segment is a hose or a pipe. A fluid channel part can be directly or indirectly connected to another fluid channel part. Indirect connection is merely understood as fluid connection in this article. Direct connection should be understood in this article as meaning that a fluid channel part is adjacent to another fluid channel part, and fluid can flow directly from one fluid channel part into another fluid channel part along the flow direction.

[0009] In the embodiments described in this specification, if a reference is made to an "element," this refers to the first shape-stabilizing element, the second shape-stabilizing element, and the flexible element. This rule does not apply if a specific element (e.g., the flexible element) is explicitly mentioned. In the embodiments described in this specification, if a reference is made to a "shape-stabilizing element," this refers to the first shape-stabilizing element and the second shape-stabilizing element. This rule does not apply if a specific shape-stabilizing element (e.g., the first shape-stabilizing element) is explicitly mentioned.

[0010] When the forces that normally act on the wiper arm during use act on the shape stabilizing element, the shape of the shape stabilizing element remains essentially unchanged. These forces are, for example, those caused by airflow. Another example is the force generated by the fluid flowing in the fluid channel. However, any expected shape changes during installation need not be taken into account. For example, expected shape changes can occur when a portion of the receptacle of the connecting part of the shape stabilizing element is removed or opened to allow for the insertion of the lever arm (see below).

[0011] Compared to a flexible element, this shape stability enables the shape-stabilizing element to maintain its position relative to the rod-shaped arm more reliably. This shape stability also leads to the first shape-stabilizing element to maintain its position relative to the second shape-stabilizing element more reliably. This shape stability also leads to the first shape-stabilizing element to maintain its position relative to the elastic element more reliably. This shape stability also leads to the first shape-stabilizing element to maintain its position relative to a connecting member (e.g. a nozzle holder with a nozzle) more reliably. This shape stability also reduces the risk of undesired changes in the shape of the shape-stabilizing element. This shape stability can prevent the shape-stabilizing element from accidentally changing its shape when machining the shape-stabilizing element. An example of machining is the formation of a hole or a thread in a shape-stabilizing element.

[0012] This shape stability therefore increases the reliability of the wiper's function. For example, leaks are avoided because the fluid channel sections that follow one another in the direction of the fluid flow are not displaced relative to one another. Since the direction of the fluid outlet position does not change, the desired fluid jet direction is maintained. The pressure of the fluid jet that is to strike the window pane is not influenced by the deformation of the fluid channel section of the shape-stabilizing element. The lack of flexibility leads to increased manufacturing precision. This allows tighter tolerances to be maintained. This improves the function of the fluid outlet and nozzle element in particular, which are mounted in or on the shape-stabilizing element.

[0013] The flexibility enables the flexible element to adapt to the shape of the rod-shaped arm. It can also adapt to the shape of the dimensionally stable element. The flexible element is particularly bendable and elastic. It is preferably substantially tubular and rubber hose-like and can be extended, in particular, in the transverse direction when sliding over an object having a cross-section greater than that of the flexible element itself.

[0014] The flexible element forms at least a portion of the outer surface of the accessory. In a preferred embodiment, in which the flexible element completely covers the dimensionally stable element, the flexible element forms the entire outer surface of the accessory. Since the accessory is connected to the lever-shaped arm so that the lever-shaped arm is placed in the receiving portion of the accessory, the flexible element also at least partially forms the outer surface for this connection.

[0015] The technical requirements required of the outer surface of a conventional lever arm and the outer surfaces of components attached to it (such as a nozzle unit, hose, or pipe) need only be met by the outer surface of the flexible element, according to the teachings of the present invention. Therefore, these technical requirements apply only to a single component. The technical requirements that the outer surface of the flexible element must meet include, in particular, aerodynamic requirements. The flexible element can preferably be shaped so that its outer surface attenuates airflow. Preferably, the flexible element is shaped so that it leverages the airflow to generate a pressing force on the lever arm and, therefore, on the wiper blade. As a result, the wiper blade can reliably rest against the vehicle's window pane even at high speeds, ensuring high wiping quality. Because the flexible element forms the outer surface of the attachment, it can also be shaped to achieve an aesthetically pleasing effect. Since the attachment is not manufactured in one piece, according to the teachings of the present invention, the flexible element can be replaced with another flexible element. Replacement requirements can arise, for example, in the event of damage to the flexible element or changes in technical or aesthetic requirements for the flexible element. This interchangeability offers a resource-saving alternative to replacing the entire lever arm. The advantage of covering the shape-stabilizing element with a flexible element is also that the shape-stabilizing element can be connected more securely to the rod-shaped arm. This is particularly true if the flexible element is connected to the shape-stabilizing element in a press-fit manner when covering the shape-stabilizing element.

[0016] Preferably, the flexible element not only partially but completely covers the first shape-stabilizing element. Additionally or alternatively, the flexible element not only partially but completely covers the second shape-stabilizing element. Particularly preferably, the flexible element completely covers the first shape-stabilizing element, except for a portion of the first fluid channel portion and / or an interface of the first flexible element.

[0017] In the examples of the present invention, reference to a "connection" refers to the connection of the shape-stabilizing element, the connection of the flexible element, and the connection of the load-bearing portion. This rule does not apply if a specific connection of an element or load-bearing portion (e.g., the connection of the flexible element) is explicitly mentioned. This also applies to the components of the connection (receiving portion and opening).

[0018] The connecting portion is used to connect the component or load-bearing part to the rod-shaped arm. This connection can be achieved by force-fitting, form-fitting, or material-fitting. The connection can also be formed by combining two or three of these operating principles. Preferably, the connection can be released without destroying or impairing the function of the connecting portion and the rod-shaped arm (a releasable connection), thereby allowing for repeated use. Preferably, the connection is achieved by receiving the rod-shaped arm or by enclosing or clasping a portion of the rod-shaped arm.

[0019] The connection of the flexible element to the rod-shaped arm can be achieved by local direct contact between the receiving portion of the connecting portion of the flexible element. In particular, the connection of the flexible element to the rod-shaped arm can be achieved at least partially indirectly by locating the shape-stabilizing element between the rod-shaped arm and the receiving portion of the connecting portion of the flexible element.

[0020] The connecting portion has a receiving portion with an opening through which the rod-shaped arm can be inserted. The receiving portion is used to accommodate the rod-shaped arm or a portion of the rod-shaped arm in the receiving portion. In a preferred embodiment, the receiving portion is tubular. Particularly preferably, the tubular receiving portion has a closed profile. For example, the profile is substantially circular or rectangular. Alternatively, the tubular receiving portion has an open profile. For example, the profile is substantially U-shaped or V-shaped. A receiving portion having a substantially U-shaped or V-shaped profile can be used to connect the rod-shaped arm by fastening the walls of the receiving portion to the rod-shaped arm.

[0021] The opening is used to allow the rod-shaped arm to be inserted through it into the receiving portion. Within the meaning of the present invention, the term "opening" should be understood to refer to a position suitable for guiding the rod-shaped arm into the receiving portion so that the rod-shaped arm can be placed in the receiving portion. In one embodiment, the receiving portion can have multiple openings. This allows for more flexible installation.

[0022] In the tubular receiving portion, an opening is connected to one end of the pipe. Here, the rod-shaped arm can be inserted into the receiving portion along the longitudinal axis of the pipe. In tubular receiving portions with an open profile, the opening is preferably a lateral opening of the tubular receiving portion, limited by the opening of the profile. Here, the rod-shaped arm can be inserted laterally into the tubular receiving portion. In one embodiment, tubular receiving portions with a closed profile also offer the option of providing a lateral opening. This can be achieved by dividing the tubular receiving portion into two tube portions by a plane. This plane contains the longitudinal axis of the pipe or is parallel to the longitudinal axis of the pipe, but cuts through the pipe. These tube portions can be moved relative to each other, thereby providing a lateral opening with a tubular profile. Therefore, the receiving portion can be designed to be openable and / or closable. In an exemplary embodiment, this can be achieved by removing one tube portion from the other. Preferably, the tube portions are releasably connected to each other, for example, by means of a locking connection. This allows the tube portions to be connected together after the rod-shaped arm is inserted into the lateral opening. Thus, in another exemplary embodiment, the ends of the tubes separated by the plane facing each other are allowed to be connected to each other by hinges. The other ends of the tubes separated by the plane facing each other can be releasably connected to each other, for example, by a locking connection.

[0023] In a preferred embodiment, a third fluid channel portion is formed in the flexible element, the third fluid channel portion forming part of the fluid channel. The third fluid channel portion is preferably arranged between the first fluid channel portion and the second fluid channel portion. Preferably, the third fluid channel portion is directly connected to the first fluid channel portion and directly connected to the second fluid channel portion.

[0024] Preferably, the third fluid channel portion is formed by a flexible member that covers at least one gap between the first fluid channel portion and the second fluid channel portion. This overlap creates a space between the first fluid channel portion and the second fluid channel portion, through which fluid can flow from the first fluid channel portion to the second fluid channel portion.

[0025] In a preferred embodiment, the accessory has a load-bearing portion having a connection portion for connecting the load-bearing portion to the rod-shaped arm. The first shape-stabilizing element and the second shape-stabilizing element are arranged on the load-bearing portion so that a part of the connection portion of the load-bearing portion forms the connection portion of the first shape-stabilizing element and another part of the connection portion of the load-bearing portion forms the connection portion of the second shape-stabilizing element. The connection portion of the first shape-stabilizing element and the connection portion of the second shape-stabilizing element can be directly connected to each other. Alternatively, the connection portion of the first shape-stabilizing element and the connection portion of the second shape-stabilizing element can be directly connected to each other by arranging that part of the connection portion of the load-bearing portion which does not form the connection portion of the first shape-stabilizing element and does not form the connection portion of the second shape-stabilizing element between the connection portion of the first shape-stabilizing element and the connection portion of the second shape-stabilizing element. Preferably, the load-bearing portion is designed as a one-piece. The load-bearing portion can be manufactured, for example, by an injection molding process.

[0026] The support portion comprises a connection portion for the first shape-stabilizing element and a connection portion for the second shape-stabilizing element. The support portion thus forms a subassembly of the wiper arm. This reduces the amount of assembly effort. In particular, the step of connecting the connection portion of the first shape-stabilizing element to the connection portion of the second shape-stabilizing element or fixing the position of the connection portion of the first shape-stabilizing element relative to the position of the connection portion of the second shape-stabilizing element is eliminated. Since the first fluid channel portion preferably has a fixed position relative to the connection portion of the first shape-stabilizing element and the second fluid channel portion preferably has a fixed position relative to the connection portion of the second shape-stabilizing element, they also have a fixed position relative to each other and relative to the support portion. As a result, a portion of the first fluid channel portion, such as the fluid outlet, has a constant orientation not only relative to the connection portion of the first shape-stabilizing element, but also relative to both the second shape-stabilizing element and the support portion. The same applies to portions of the second fluid channel portion. This improves the reliability of the wiper function.

[0027] Preferably, the receiving portion of the first shape-stabilizing element, the receiving portion of the second shape-stabilizing element, and the receiving portion of the carrier are all tubular. Particularly preferably, these receiving portions have a closed contour, which is particularly preferably substantially rectangular. Thus, the entire subassembly can be connected to the rod-shaped arm by inserting the rod-shaped arm into the receiving portion of the carrier.

[0028] In a preferred embodiment, an interface for a hose or a nozzle holder is formed on the first form-stabilizing element. Furthermore or alternatively, an interface for a hose is formed on the second form-stabilizing element. Within the meaning of the present invention, the term "interface" is to be understood as a component capable of establishing a connection between a form-stabilizing element and an interface part. This is particularly a coupling portion or a coupling part. Preferably, the interface is in fluid connection with the fluid channel portion of the form-stabilizing element. Preferably, the interface has a seal that ensures that no fluid can escape at the connection point when the connection is established. Examples of interface parts include hoses, nozzles, nozzle holders, connecting sleeves, connecting pipes, couplings, flexible elements, or other form-stabilizing elements. Preferably, the interface of the second form-stabilizing element is configured for a hose that conducts fluid from a fluid source to an accessory. Particularly preferably, the interface of the first form-stabilizing element is configured for a hose that conducts fluid from an accessory to the nozzle holder or for the nozzle holder. The interface is particularly a socket. The socket can have an external thread or an internal thread. The interface can also be a recess, such as a hole with an internal thread.

[0029] In a preferred embodiment, the first and / or second form-stabilizing elements have fluid outlets and / or nozzle elements. Within the meaning of the present invention, the term "fluid outlet" should be understood as a recess disposed in the first, second, or flexible element, which is fluidically connected to the fluid passage of the respective element. Fluid can flow out of the respective element through this recess. These recesses can, for example, be cylindrical. They can also, for example, have the shape of a nozzle and, in this case, are also referred to as nozzles.

[0030] For the purposes of the present invention, the term "nozzle element" is understood to mean a component having a nozzle. For example, it can be a spherical nozzle or a nozzle plate. The nozzle element is in fluidic connection with a dimensionally stable or flexible element, so that the fluid can flow out of the fluid channel portion through the nozzle of the nozzle element.

[0031] By means of the element having a fluid outlet or nozzle element, a fluid can additionally be applied to the window pane or the wiper blade, or the wiper blade can be wetted thereby. Preferably, all dimensionally stabilizing elements have one or more fluid outlets or nozzle elements.

[0032] In a preferred embodiment, the flexible element has a protruding air deflector. The term "air deflector" refers to a device for guiding the air flow around the attachment. The air deflector reduces the resistance caused by the air flow and increases the pressing force on the attachment and thus on the wiper blade. This ensures that the wiper blade can be placed against the vehicle window even when driving at high speeds. This allows a high wiping quality to be achieved. In addition, the air deflector can be designed so that it facilitates the air flow guidance in the form of a water jet, which is achieved by applying the fluid from the nozzle to the vehicle window. The air deflector is constructed as part of the flexible element. It is formed according to the shape of the flexible element. No separate component is required. Since the air deflector is part of the flexible element, it can be placed at locations of the rod-shaped arm where, in particular, a dimensionally stable air deflector cannot be installed or where installing a dimensionally stable air deflector is relatively complicated.

[0033] In a preferred embodiment, the flexible element comprises a base and an end portion. A bend is provided between the base and the end portion. In particular, the base, the end portion, and the bend are all flexible. Here, when the base surrounds the dimensionally stable element, the elastic deformability of the base decreases.

[0034] This makes it possible, in particular, to adapt to conventional lever arms having a substantially straight first portion and a second portion which adjoin one another and are arranged at an angle, in particular an obtuse angle, relative to one another. Since the flexible element already has a shape similar to or even identical to the lever arm, the installation step of the flexible element over the lever arm is simplified and the adaptability of the flexible element to the lever arm is improved.

[0035] The bend connects the base and the end. The bend is substantially straight in the unassembled state and substantially angular in the assembled state. This angular shape is achieved by allowing the elastic region to follow the wiper rod during sliding. Preferably, the bend has an obtuse angle.

[0036] Preferably, the base and the end portions are substantially straight portions of the flexible element.Preferably, the base is the longer portion.

[0037] In a preferred embodiment, the attachment has a lateral fluid outlet, through which a portion of the fluid passing through the fluid channel can be discharged.

[0038] In the sense of the present invention, the term "fluid outlet" should be understood as described above as a recess arranged in the first shape-stabilizing element, the second shape-stabilizing element or the flexible element, which recesses are respectively in fluid connection with the fluid channel portion of the corresponding element and through which the fluid flows out of the respective element.

[0039] The fluid outlets provided by the individual components are, in particular, fluid outlets provided by the accessories. In this case, the fluid can flow out not only from the individual components but also from the accessories. This is the case, for example, if the outer surface of the component is also the outer surface of the accessory. This is also the case, for example, when a dimensionally stable element with a fluid outlet is covered by a flexible element with a fluid outlet, and these fluid outlets are fluidically connected.

[0040] By providing the attachment with a fluid outlet, fluid can additionally be applied to the window pane or the wiper blade, or the wiper blade can be wetted thereby.

[0041] In this context, the term "lateral" is to be understood as meaning that the fluid outlet is not oriented parallel to the longitudinal axis of the accessory. Preferably, "lateral" means that the fluid outlet is oriented perpendicular to the longitudinal axis of the accessory.

[0042] Preferably, the accessory has a plurality of lateral fluid outlets.

[0043] The present invention also relates to a wiper arm for a vehicle windshield wiper. The wiper arm has a rod-shaped arm and an accessory according to the present invention. A first shape-stabilizing element is connected to the rod-shaped arm via a connecting portion of the first shape-stabilizing element, wherein the rod-shaped arm is arranged in a receiving portion of the connecting portion of the first shape-stabilizing element. Additionally or alternatively, a second shape-stabilizing element is connected to the rod-shaped arm via a connecting portion of the second shape-stabilizing element, wherein the rod-shaped arm is arranged in a receiving portion of the connecting portion of the second shape-stabilizing element. Furthermore, a flexible element is connected to the rod-shaped arm via a connecting portion of the flexible element, wherein the rod-shaped arm is arranged in a receiving portion of the connecting portion of the flexible element. In this case, the flexible element at least partially covers the first shape-stabilizing element and it also at least partially covers the second shape-stabilizing element. In a preferred embodiment, the flexible element completely covers the first shape-stabilizing element and also completely covers the second shape-stabilizing element. Preferably, the flexible element surrounds the first shape-stabilizing element and it also surrounds the second shape-stabilizing element.

[0044] In a preferred embodiment of the wiper arm, the accessory is connected to the lever arm in such a way that displacement of the accessory relative to the lever arm in the longitudinal direction of the lever arm is prevented, in particular by a locking mechanism. This can be achieved, for example, by a locking connection. This locking connection is typically achieved by two complementary locking members: a locking piece and a locking groove. The locking member can, for example, be mounted on a first dimensionally stabilizing element, while a second locking member, complementary to the first, can be mounted on the lever arm. This locking connection has the advantage of providing a releasable connection.

[0045] The attachment is preferably connected to the lever arm in such a way that the attachment is prevented from twisting about the longitudinal direction of the lever arm. Advantageously, this is ensured by the shape of the lever arm and the shape of the receiving portion of the connection portion. For example, the lever arm may have a polygonal shape, while the receiving portion for receiving the lever arm may also have a complementary polygonal shape.

[0046] In a preferred embodiment of the wiper arm, the flexible element covers the entire length of the rod-shaped arm and / or the entire circumference of the rod-shaped arm. In a preferred embodiment, the wiper arm has a nozzle holder with a nozzle. The nozzle is in fluid connection with a fluid channel of the accessory.

[0047] The invention further relates to a vehicle having a wiper arm and a wiper blade according to the invention.

[0048] The present invention also relates to a method for installing a fluid channel for conveying a fluid to a rod-shaped arm of a wiper arm of a windshield wiper. Here, an accessory according to the present invention is fixed to the rod-shaped arm.

[0049] Preferably, the first and second form-stabilizing elements are first connected to the flexible element such that the flexible element at least partially covers the first form-fitting element and the flexible element at least partially covers the second form-fitting element. These connected elements are then mounted as a single unit on the rod-shaped arm. Alternatively, the first and second form-stabilizing elements can be mounted on the rod-shaped arm first. The flexible element can then be mounted on the rod-shaped arm.

[0050] The invention also relates to the use of the attachment according to the invention for providing a fluid channel on a lever-shaped arm of a wiper arm of a windshield wiper.

[0051] The present invention also relates to a system comprising a first accessory according to the present invention and a second accessory according to the present invention, and a coupling device by which the first accessory is connected to the second accessory.

[0052] For the purposes of the present invention, the term "coupling device" refers to a device that can establish a connection between a first accessory and a second accessory. The coupling device is preferably tubular and can be connected at one end to a coupling point of the first accessory and at the other end to a coupling point of the second accessory. These coupling points can be interfaces (see above). Preferably, the fluid channels of the connected accessories are in fluidic connection. Particularly preferably, the connection is sealed, so that no fluid can escape in the connection area. This sealing can be achieved, for example, by radial seals in the tubular coupling device. The coupling device can also be, for example, hose-shaped. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The present invention is described below with the aid of the accompanying drawings, which only show exemplary embodiments of the present invention.

[0054] Figure 1 An exemplary embodiment of an accessory according to the invention is shown, which is connected to a lever-shaped arm;

[0055] Figure 2 Shown according to Figure 1 An embodiment wherein the flexible element has been removed;

[0056] Figure 3 is based on Figure 1 An enlarged partial view of the attachment, with the lever arms hidden;

[0057] Figure 4 An exemplary embodiment of a wiper arm according to the present invention is shown;

[0058] Figure 5 Another example of an accessory according to the present invention is shown;

[0059] Figure 6 Shown according to Figure 5 Cross-sectional view of the attachment. DETAILED DESCRIPTION

[0060] Figure 1 An exemplary embodiment of an attachment 1 for a wiper arm of a windshield wiper of a vehicle is shown by way of example, the wiper arm having a lever-shaped arm.

[0061] The accessory 1 has a fluid channel for guiding the fluid. Since the fluid channel is located inside the accessory 1, it is Figure 1 Not visible in.

[0062] The accessory further comprises a first shape stabilizing element. Figure 2 The first dimensionally stabilizing element can be clearly seen in FIG, which is designated there with the reference numeral 2. A first fluid channel section 3 is provided in the first dimensionally stabilizing element 2.

[0063] Further references below Figure 2 The attachment 1 further comprises a second shape stabilizing element 4. A second fluid channel portion 5 is provided in the second shape stabilizing element 4.

[0064] The first shape-stabilizing element 2 further comprises a first connecting portion 6 for connecting the first shape-stabilizing element 2 to a rod-shaped arm 7. The first connecting portion 6 has a receiving portion for receiving the rod-shaped arm 7. The receiving portion in turn has a first opening 8 through which the rod-shaped arm can be inserted into the receiving portion.

[0065] The second shape-stabilizing element 4 further comprises a second connecting portion 9 for connecting the second shape-stabilizing element 4 to the rod-shaped arm 7. The second connecting portion 9 has a receiving portion for receiving the rod-shaped arm 7. The receiving portion also has an opening through which the rod-shaped arm can be inserted into the receiving portion.

[0066] Reference again Figure 1 : A flexible element 10 is provided, which has a connection portion for connecting the flexible element 10 to the rod-shaped arm 7. Figure 3 The third connecting portion 11 has a receiving portion 12 for receiving the rod-shaped arm 7. The receiving portion 12 has a second opening 13 through which the rod-shaped arm can be inserted into the receiving portion.

[0067] Referenced again below Figure 1 : In this exemplary embodiment, the flexible element 10 almost completely covers the first shape stabilizing element. Only a portion of the first fluid channel portion 3 can be seen. The flexible element 10 also covers the second shape stabilizing element. The second shape stabilizing element is completely covered, so that Figure 1 It is not visible in the .

[0068] Referenced again below Figure 2 The accessory 1 has a carrier portion 14 with a connection portion for connecting it to the rod-shaped arm 7. The first and second shape-stabilizing elements 2 and 4 are arranged on the carrier portion such that a portion of the connection portion of the carrier portion forms the first connection portion 6 of the first shape-stabilizing element 2, while another portion of the connection portion of the carrier portion forms the second connection portion 9 of the second shape-stabilizing element 4. In this example, the carrier portion 14 is tubular. By sliding the tubular carrier portion 14 over the rod-shaped arm 7, the first and second shape-stabilizing elements can also be connected to the rod-shaped arm.

[0069] exist Figure 1 As can also be seen in the figure, the flexible element 10 has a base 15 and an end 16, with a bend 17 provided between the base 15 and the end 16. This allows the flexible element to adapt particularly well to the angular shape of the lever arm 7. In this case, the flexible element covers almost the entire lever arm, that is, up to the lever arm 18 of the wiper arm. Since the flexible element in this example has an air guide surface 19 extending along its entire length, the airflow can be utilized and influenced over almost the entire length of the lever arm, thereby facilitating the function of the wiper. This reduces resistance due to the airflow and increases the pressure on the attachment and, therefore, the wiper blade. This ensures that the wiper blade remains in contact with the window pane even at high speeds, resulting in high wiping quality. Furthermore, the air guide surface 19 is designed to guide the airflow in a manner that facilitates the jet flow, which is achieved by applying the fluid from the nozzle to the window pane.

[0070] Figure 4 An exemplary embodiment of a windshield wiper 23 according to the invention is shown, which has a wiper arm 20 and a wiper blade 22. The wiper arm 20 comprises an attachment 1 according to an exemplary embodiment of the invention and is connected to the wiper blade 22. It can also be seen that the attachment 1 is coupled to the nozzle holder 21.

[0071] Figure 5 Another exemplary embodiment of an attachment 1 according to the invention is shown, which is similar to the previous embodiment. The same reference numerals refer to the same features as in the previous embodiment. Figure 6 Shown according to Figure 5 In the sectional view along the section arrow A of FIG. 1 , it can be seen how the flexible element 10 surrounds the shape stabilizing element 2 (and / or the second shape stabilizing element 4 ).

Claims

1. An attachment (1) for a wiper arm (20) having a rod-shaped arm (7), wherein: The attachment (1) has: a fluid channel for conveying fluid; and a first shape-stabilizing element (2), wherein a first fluid channel portion (3) is formed in the first shape-stabilizing element (2); and a second shape-stabilizing element (4), wherein a second fluid channel portion is formed in the second shape-stabilizing element (4), It is characterized by: The first shape stabilizing element (2) has a A first connecting portion (6) connected to the rod-shaped arm (7), wherein the first connecting portion (6) A receiving portion for receiving the rod-shaped arm (7), wherein the receiving portion has a first opening (8) through which the rod-shaped arm (7) can be inserted into the receiving portion; and / or The second shape-stabilizing element (4) has a second connecting portion (9) for connecting the second shape-stabilizing element (4) to the rod-shaped arm (7), wherein the second connecting portion has a receiving portion for receiving the rod-shaped arm (7), and the receiving portion has an opening through which the rod-shaped arm (7) can be inserted into the receiving portion; and A flexible element (10) is provided, which has a third connection part (11) for connecting the first shape-stabilizing element (2) to the rod-shaped arm (7), wherein the third connection part (11) has a receiving part (12) for receiving the rod-shaped arm (7), and the receiving part (12) has a second opening (13), and the rod-shaped arm (7) can be inserted into the receiving part (12) through the second opening (13), wherein the flexible element (10) at least partially covers the first shape-stabilizing element (2), and the flexible element (10) at least partially covers the second shape-stabilizing element (4), A carrier portion (14) is provided, the carrier portion (14) having a connection portion for connecting the carrier portion (14) to the rod-shaped arm (7), wherein the first shape-stabilizing element (2) and the second shape-stabilizing element (4) are arranged on the carrier portion (14) so ​​that a part of the connection portion of the carrier portion (14) forms the first connection portion (6) of the first shape-stabilizing element (2), and another part of the connection portion of the carrier portion (14) forms the second connection portion (9) of the second shape-stabilizing element (4).

2. The accessory (1) according to claim 1, characterized in that A third fluid channel portion is formed in the flexible element (10).

3. The accessory (1) according to claim 1, characterized in that An interface for a hose and / or a nozzle holder and / or a wiper blade and / or a fastening element is provided on the first dimensionally stabilizing element (2), and / or an interface for a hose is provided on the second dimensionally stabilizing element (4).

4. The accessory (1) according to claim 1, characterized in that The first shape-stabilizing element (2) and / or the second shape-stabilizing element (4) has a fluid outlet or a nozzle element.

5. The accessory (1) according to claim 1, characterized in that The flexible element (10) has a protruding wind deflector (19).

6. The accessory (1) according to claim 1, characterized in that The flexible element (10) has a base (15) and an end (16), and a bent portion (17) is provided between the base (15) and the end (16).

7. The accessory (1) according to claim 1, characterized in that A lateral fluid outlet is provided, through which a portion of the fluid flowing through the fluid channel can be discharged.

8. A wiper arm (20) having a rod-shaped arm (7), characterized in that: An accessory (1) according to any one of claims 1 to 7 is provided, wherein: The first shape-stabilizing element (2) is connected to the rod-shaped arm (7) via a first connection portion (6) of the first shape-stabilizing element (2), wherein the rod-shaped arm (7) is received in a receiving portion of the first connection portion (6) of the first shape-stabilizing element (2); and / or a second shape-stabilizing element (4) being connected to the rod-shaped arm (7) via a second connection portion (9) of the second shape-stabilizing element (4), wherein the rod-shaped arm (7) is received in a receiving portion of the second connection portion (9) of the second shape-stabilizing element (4); and The flexible element (10) is connected to the rod-shaped arm (7) via a third connection portion (11) of the flexible element, wherein the rod-shaped arm is received in a receiving portion (12) of the third connection portion (11) of the flexible element (10). wherein the flexible element (10) at least partially covers the first shape-stabilizing element (2), and the flexible element (10) at least partially covers the second shape-stabilizing element (4).

9. The wiper arm (20) according to claim 8, characterized in that The accessory (1) is connected to the lever-shaped arm (7) so that the accessory (1) is prevented from being displaced relative to the lever-shaped arm (7) in the longitudinal direction of the lever-shaped arm (7).

10. The wiper arm (20) according to claim 8 or 9, characterized in that A carrier portion (14) is provided, which has a connection portion for connecting the carrier portion (14) to the rod-shaped arm (7), wherein the first shape-stabilizing element (2) and the second shape-stabilizing element (4) are arranged on the carrier portion (14) so ​​that a part of the connection portion of the carrier portion (14) forms the first connection portion (6) of the first shape-stabilizing element (2), and another part of the connection portion of the carrier portion (14) forms the second connection portion (9) of the second shape-stabilizing element (4), and the flexible element (10) partially covers the rod-shaped arm (7) and the carrier portion.

11. The wiper arm (20) according to claim 8, characterized in that A nozzle holder (21) is provided, which has a nozzle and a wiper blade adapter, wherein the nozzle is fluidically connected to a fluid channel of the accessory (1).

12. A windshield wiper (23) comprising a wiper arm (20) and a wiper blade (22) according to any one of claims 8 to 11.

13. A method for mounting a fluid channel for conveying a fluid on a rod-shaped arm (7) of a wiper arm (20) of a windshield wiper (23), characterized in that An accessory (1) according to any one of claims 1 to 7 is fastened to the lever-shaped arm (7).

14. A system for a windshield wiper of a vehicle, the system comprising a first accessory and a second accessory, the first accessory and the second accessory being the accessories according to any one of claims 1 to 7, wherein: A coupling device is provided, by which the first accessory is connected to the second accessory.

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