Wiper arm device and wiper system

Abstract

The invention relates to a wiper arm device (10), comprising at least one wiper arm adapter (14) for coupling to at least one wiper blade (102) and comprising at least one fluid supply unit (24) for supplying the at least one wiper blade (102) with wiper fluid and which has at least one fluid line (26). According to the invention, the fluid supply unit (24) has a coupling unit (16) which is designed as a top part for the at least one fluid line (26), and which has at least two coupling elements (20, 22), which are designed to form a mechanical connection to the at least one wiper blade (102) and wherein exactly one coupling element (20) of the at least two coupling elements (20, 22) is designed to form a fluidic connection to the at least one wiper blade (102).

Description

[0001] Description

[0002] Wiper arm device and wiper system

[0003] State of the art

[0004] A wiper arm device having at least one wiper arm adapter for coupling to at least one wiper blade and having at least one fluid supply line unit for supplying the at least one wiper blade with wiping fluid, which has at least one fluid line, has already been proposed.

[0005] Disclosure of the invention

[0006] The invention is based on a wiper arm device with at least one wiper arm adapter for coupling to at least one wiper blade and with at least one fluid supply line unit for supplying the at least one wiper blade with wiping fluid, which has at least one fluid line.

[0007] It is proposed that the fluid supply unit has a coupling unit which is designed as a head piece for the at least one fluid line and which has at least two coupling elements which are designed for a mechanical connection to the at least one wiper blade and wherein exactly one coupling element of the at least two coupling elements is designed for a fluidic connection to the at least one wiper blade.

[0008] A “wiper arm device” should preferably be understood to mean at least one part, preferably a subassembly, of a windshield wiper. The wiper arm device can preferably also comprise the entire windshield wiper, in particular including a wiper blade. The wiper arm device is preferably intended for use on a vehicle. The wiper arm device preferably forms part of the windshield wiper, in particular at least one wiper rod with a wiper arm adapter, between a wiper drive and a wiper blade. The wiper arm device, in particular as part of the windshield wiper, is preferably intended for cleaning a surface, preferably a surface of a window on a vehicle. The wiper arm device is preferably coupled to a vehicle, preferably the wiper drive of a vehicle, for cleaning a surface of a vehicle window.The fact that an object is intended for a specific function should preferably be understood to mean that the object fulfills and / or performs this specific function in at least one application and / or operating state. An "operating state" should preferably be understood to mean a state in which the wiper arm device is ready for a wiping process and / or a wiping operation and / or is in a wiping operation in which a wiper strip unit, preferably a wiper lip, of the wiper blade, in particular of the windshield wiper, is preferably guided over the surface of the vehicle windshield and advantageously rests against the surface of the vehicle windshield.

[0009] The wiper arm device preferably has at least one wiper rod. The wiper rod is preferably formed integrally with the wiper arm adapter. “Integral” is to be understood in particular as being materially connected, in particular molded in one piece, wherein the one piece can preferably be produced from a single blank, a mass and / or a cast, particularly preferably in an injection molding process, in particular a single- and / or multi-component injection molding process. The wiper rod is preferably formed from a metal material. The wiper arm adapter is preferably formed from the same material as the wiper rod. The wiper arm adapter is preferably designed as a side-lock adapter. The wiper arm adapter preferably comprises at least one pin element.

[0010] Preferably, the at least one fluid supply unit is designed to guide wiping fluid, in particular washer water, along the wiper rod from an end of the wiper rod facing away from the wiper arm adapter to the wiper arm adapter, in particular to the wiper blade. Preferably, the fluid supply unit is arranged at least for the most part in a cavity delimited by the wiper rod. Preferably, the at least one fluid supply unit comprises exactly one fluid line, in particular exactly one hose element, for supplying the wiper blade. Preferably, the exactly one fluid line, in particular the exactly one hose element, extends along a longitudinal axis of the wiper rod from an end of the wiper rod facing away from the wiper arm adapter to the wiper arm adapter, in particular to the wiper blade. Preferably, a longitudinal axis of the fluid line, in particular of the hose element, is at least substantially parallel to a longitudinal axis of the wiper rod.A "longitudinal axis" of an object is understood to mean, in particular, an axis that runs parallel to the longest edge of a smallest geometric cuboid that just completely encloses the object, and preferably runs through a geometric center of the object, in particular of the cuboid. "Substantially parallel" is understood here to mean, in particular, an alignment of a direction relative to a reference direction, in particular in a plane, wherein the direction deviates from the reference direction by, in particular, less than 15°, advantageously less than 10°, and particularly advantageously less than 5°.

[0011] The coupling unit is preferably connected to the hose element, in particular fluidically. The coupling unit is preferably designed as an end piece, in particular a head piece, for the fluid line, in particular the hose element, at an end of the fluid line, in particular the hose element, facing the wiper arm adapter. Preferably, the at least two coupling elements are of equal size. Preferably, the at least two coupling elements are of equal shape. Preferably, the at least two coupling elements are arranged at a distance from one another.

[0012] The coupling unit preferably has at least two suspension extensions for mounting on the wiper arm adapter. The at least two suspension extensions are preferably arranged on opposite sides of the coupling unit. The at least two suspension extensions are preferably arranged in alignment along a longitudinal axis of the pin element. The wiper arm adapter preferably has a cover element which is pivotally connected to the pin element. The cover element preferably has two suspension recesses which are opposite one another along the longitudinal axis of the pin element. The at least two suspension extensions are preferably designed for connection to the cover element, in particular to the at least two suspension recesses.

[0013] Preferably, the longitudinal axis of the pin element is at least substantially perpendicular to the longitudinal axis of the wiper rod and / or the wiper arm adapter. The term "substantially perpendicular" is intended here to define, in particular, an orientation of a direction relative to a reference direction, wherein the direction and the reference direction, particularly viewed in a projection plane, enclose an angle of 90°, and the angle has a maximum deviation of, in particular, less than 8°, advantageously less than 5°, and particularly advantageously less than 2°.

[0014] Preferably, the coupling unit defines exactly one fluid channel. Preferably, one of the coupling elements defines a portion of the fluid channel. Preferably, the fluid channel is fluidically separated from one of the coupling elements.

[0015] Preferably, the fluid channel is formed as a cavity in the coupling unit. Preferably, at least one coupling element is solid, in particular free of cavities.

[0016] The coupling unit is preferably formed, in particular manufactured, in one or two parts. "One-piece" is understood to mean molded in one piece, with the one piece preferably being produced from a single blank, a mass, and / or a cast, particularly preferably using an injection molding process, in particular a single- and / or multi-component injection molding process.

[0017] Particularly preferably, the coupling unit is originally designed as two separate parts, in particular manufactured as a coupling base body and a channel cover. Preferably, the coupling base bodies and a channel cover are designed to be integrally connected to one another, for example by ultrasonic welding and / or by gluing. Alternatively, the coupling base bodies and a channel cover can be connected, in particular connectable, by a snap-in connection. Preferably, the coupling base bodies and a channel cover are integrally connected to one another. Preferably, the at least two coupling elements are arranged on the coupling base body. Preferably, the fluid channel in the coupling unit is partially delimited by the coupling base body and partially by the channel cover.The channel cover is preferably arranged on a side of the coupling base body facing away from the at least two coupling elements, in particular connected to the coupling base body. The channel cover preferably extends over at least 50%, preferably over at least 60%, in particular over at least 75%, of a maximum extent of the fluid channel along a longitudinal axis of the fluid channel.

[0018] The inventive design of the wiper arm device allows for advantageous freedom of movement of the wiper arm device. In particular, the freedom of rotation of the wiper rod can be advantageously increased. In particular, the torque of the wiper arm device can be advantageously reduced. In particular, friction between the fluid line and the wiper rod can be advantageously reduced.

[0019] It is further proposed that the at least two coupling elements are designed to form a mechanical plug-in connection with the at least one wiper blade. Preferably, one of the at least two coupling elements delimits the fluid channel to a circular outer contour in a cross-section perpendicular to a plug-in axis of the at least one coupling element. Preferably, the at least two coupling elements have a maximum extension along a plug-in axis of the at least two coupling elements for a mechanical plug-in connection, which is intended to be plugged at least halfway into at least one recess in the wiper blade. The at least two coupling elements can be designed as plug-in recesses, in particular for receiving plug-in extensions of the wiper blade. An advantageously quickly achievable mechanical and fluidic connection between the coupling unit and the wiper blade can be achieved.

[0020] It is further proposed that the at least two coupling elements are designed as plug-in extensions. Preferably, the at least two coupling elements are designed as cylindrical elements. Preferably, the at least two coupling elements have a circular outer contour in a cross-section perpendicular to a longitudinal axis of the at least two coupling elements. Preferably, the at least two coupling elements have a smaller diameter at a respective free end of the at least two coupling elements than at a connecting end of the at least two coupling elements. Preferably, the at least two coupling elements each have two regions which extend along the plug-in axis and have a constant diameter. Preferably, the at least two coupling elements each have a central region which extends along the plug-in axis and has a linearly varying diameter.It is advantageous to achieve a rotationally secure connection of the coupling unit to the wiper blade around the plug-in axis of the at least two coupling elements.

[0021] It is further proposed that a coupling unit has at least one supply coupling element for connection to the at least one fluid line, which has a connection direction that is aligned at least substantially perpendicular to the connection directions of the at least two coupling elements. Preferably, the at least one supply coupling element is designed as an elongated plug-in extension, in particular a connection piece. Preferably, the at least one supply coupling element is designed to be plugged into the fluid line, in particular into the hose element. Preferably, the at least one supply coupling element is chamfered at a free end of the at least one supply coupling element to form a blunt tip. Preferably, the at least one supply coupling element is tapered behind the blunt tip.Preferably, the at least one supply coupling element has a maximum extension in the connection direction, in particular in the plug-in direction, of the at least one supply coupling element, which is at least as long as a maximum extension of the at least two coupling elements along the plug-in axes of the at least two coupling elements. Preferably, the connection direction of the at least one supply coupling element is aligned at least substantially parallel to a longitudinal axis of the wiper rod, the wiper arm device, the wiper arm adapter and / or the wiper blade. Preferably, the connection direction of the at least one supply coupling element is aligned at least substantially perpendicular to the longitudinal axis of the pin element. This advantageously allows the fluid supply line unit, in particular the fluid line, to be guided at a distance from the walls of the wiper rod.In particular, the fluid supply unit can advantageously be arranged on the wiper rod in a low-wear manner.

[0022] It is further proposed that a coupling unit has at least one supply coupling element for connection to the at least one fluid line, which is fluidically connected to a coupling element of the at least two coupling elements. Preferably, the at least one supply coupling element at least partially delimits the fluid channel. Preferably, the supply coupling element is designed for fluidic connection to the fluid supply line unit. Preferably, the at least one supply coupling element is arranged along a connecting axis, which is aligned parallel to an imaginary shortest connecting straight line between the two coupling elements, offset from the coupling element of the at least two coupling elements, which is fluidically connected to the at least one supply coupling element.Preferably, the at least one supply coupling element is arranged along a connecting axis, which is aligned parallel to an imaginary shortest connecting line between the two coupling elements, without offset from the coupling element of the at least two coupling elements, which is purely mechanically connected to the at least one supply coupling element and which, in particular, does not delimit a cavity. This allows advantageous bilateral mechanical connection of the coupling unit. In particular, an advantageously fixed, in particular rotationally fixed, connection of the coupling unit to the wiper blade and the fluid supply unit can be achieved.

[0023] Furthermore, it is proposed that a coupling unit has at least one supply coupling element for connection to the at least one fluid line, which is fluidically connected to a coupling element of the at least two coupling elements that is arranged further apart from the at least one supply coupling element. Preferably, the at least one supply coupling element is only mechanically connected to a coupling element of the at least two coupling elements that is arranged closer to the at least one supply coupling element. Preferably, the fluid channel is limited to an at least substantially S-shaped or bi-shaped course when viewed along the insertion axis of the at least two coupling elements. Preferably, the at least one supply coupling element partially delimits a region of the fluid channel in which the fluid channel is angled by at least 45°, preferably at a right angle.Preferably, the at least one coupling element delimits a portion of the fluid channel that has a rectilinear course. Preferably, the coupling unit, in particular a fluid bridge element of the coupling unit, between the supply coupling element and the at least one coupling element, which is in particular fluidically connected to the supply coupling element, delimits the fluid channel to a curved, in particular rounded, course, in particular by at least 45°, preferably by 90°. Advantageously, one-sided fluid output can be achieved at the wiper blade, wherein a two-sided fluid output design of a wiper blade can advantageously continue to be used unchanged, and wherein the fluid supply unit is advantageously arranged in a way that protects the material.

[0024] It is further proposed that the coupling unit has at least one bridge element which connects the at least two coupling elements and which is at least partially arranged between the at least two coupling elements. The bridge element is preferably designed as a solid element, in particular without any cavities. The at least two coupling elements are preferably arranged at a distance from one another along the longitudinal axis of the pin element. The at least one bridge element preferably extends along the longitudinal axis of the pin element between the at least two coupling elements from one coupling element to the other coupling element. A longitudinal axis of the bridge element is preferably at least substantially parallel to a longitudinal axis of the pin element. The at least one bridge element is preferably designed differently from the at least one fluid bridge element. The coupling unit preferably has the fluid bridge element.An advantageously robust coupling unit can be achieved.

[0025] Furthermore, a wiper system is proposed with at least one wiper blade and with at least one wiper arm device according to the invention. The wiper blade preferably has a wind deflector unit. The wind deflector unit preferably has two spoiler elements. The spoiler elements are preferably arranged on sides of the wiper blade adapter facing away from one another along the longitudinal axis of the wiper blade. The wiper blade preferably has a wiper strip unit which is partially designed as the wiper lip. The wiper strip unit is preferably made of an elastomer material. The wiper blade preferably has two end caps. The wiper blade preferably has at least one spring rail. The wiper blade preferably has at least two spring rails. The wiper blade preferably has at least one wiper blade adapter.The wiper blade adapter preferably has at least two coupling recesses for connection to the coupling unit, in particular to the at least two coupling elements. The at least two coupling recesses are preferably arranged on a side of the wiper blade adapter facing away from the wiper lip. This allows for advantageous compatibility between the wiper blade and the wiper arm device.

[0026] Furthermore, it is proposed that the at least one wiper blade have at least two fluidly separated fluid channel units, of which exactly one is fluidly connected to the coupling unit. Preferably, the two coupling recesses of the wiper blade adapter are each connected to one of the two fluid channel units. In particular, it can be achieved that the coupling recesses for the respective fluid channel units can be used for a connection to the coupling unit. This can achieve advantageous fluid output to the wiper blade.

[0027] It is further proposed that the at least one wiper arm adapter has at least one pin element for pivoting connection to the wiper blade, wherein the at least one wiper blade has at least two fluidly separated fluid channel units, of which a fluid channel unit arranged facing a free end of the at least one pin element is fluidly connected to the coupling unit. Preferably, the fluid channel unit of the at least two fluid channel units of the wiper blade is fluidly connected to the coupling unit, which is arranged facing a wiping side of the wiper blade, wherein the wiping side is defined in particular with respect to a vehicle window on which the wiper system is arranged. The wiping side is preferably a side of the wiper blade arranged facing the free end of the at least one pin element. An advantageously aligned fluid output can be achieved.

[0028] Furthermore, a coupling unit of a wiper arm device according to the invention is proposed. This allows an advantageous spare part feature of the coupling unit to be achieved.

[0029] The wiper arm device and / or the wiper system according to the invention are not intended to be limited to the application and embodiment described above. In particular, the wiper arm device and / or the wiper system according to the invention can have a number of individual elements, components, and units that differs from the number stated herein to fulfill a function described herein. Furthermore, in the value ranges specified in this disclosure, values ​​within the stated limits are also to be considered disclosed and can be used arbitrarily.

[0030] drawing

[0031] Further advantages will become apparent from the following description of the drawings. The drawings illustrate an exemplary embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0032] They show:

[0033] Fig. 1 shows a wiper system according to the invention with a wiper arm device according to the invention and a wiper blade in a schematic, partially transparent representation,

[0034] Fig. 2 shows a coupling unit of the wiper arm device according to the invention in a schematic representation and Fig. 3 shows the coupling unit of the wiper arm device according to the invention in a schematic representation.

[0035] Description of the embodiment

[0036] Figure 1 shows a wiper system 100. The wiper system 100 includes a wiper blade 102. The wiper system 100 includes a wiper arm device 10.

[0037] The wiper blade 102 has a wind deflector unit 104. The wind deflector unit 104 has two spoiler elements 106, 106'. The wiper blade 102 has a wiper blade adapter 108. The spoiler elements 106, 106' are arranged on opposite sides of the wiper blade adapter 108 along a longitudinal axis 110 of the wiper blade 102.

[0038] The wiper blade 102 has a wiper strip unit 112, which is partially formed as the wiper lip (not shown). The wiper strip unit 112 is formed from an elastomer material. The wiper blade 102 has two end caps (not shown). The wiper blade 102 has two spring rails (not shown). The wiper blade adapter 108 has two coupling recesses 114, 114' for connection to a coupling unit 16, in particular to two coupling elements 20, 22. The two coupling recesses 114, 114' are arranged on a side of the wiper blade adapter 108 that faces away from the wiper lip.

[0039] Figure 1 shows, in particular, the wiper blade 102, which has two fluidly separated fluid channel units 116, 116', of which exactly one is fluidly connected to the coupling unit 16. The two coupling recesses 114, 114' of the wiper blade adapter 108 are each connected to one of the two fluid channel units 116, 116'.

[0040] The wiper arm device 10 has a wiper rod 12. The wiper arm device 10 has a wiper arm adapter 14 for coupling to the wiper blade 102. The wiper arm device 10 has a fluid supply unit 24 for supplying the wiper blade 102 with wiping fluid. The fluid supply unit 24 has a fluid line 26, which is arranged in particular on the wiper rod 12.

[0041] The fluid supply unit 24 has the coupling unit 16. The coupling unit 16 is designed as a headpiece for the fluid line 26. The coupling unit 16 has two coupling elements 20, 22. The coupling elements 20, 22 are designed for a mechanical connection to the wiper blade 102, in particular the wiper blade adapter 108. Exactly one coupling element 20 of the two coupling elements 20, 22 is designed for a fluidic connection to the wiper blade 102.

[0042] The wiper arm device 10 is a subassembly of a windshield wiper. The wiper arm device 10 is intended for use on a vehicle. The wiper arm device 10 forms part of the windshield wiper between a wiper drive and the wiper blade 102. The wiper arm device 10 is coupled to the vehicle, in particular to the wiper drive of a vehicle, for cleaning a surface of a vehicle windshield.

[0043] The wiper rod 12 is integrally connected to the wiper arm adapter 14. In particular, the wiper rod 12 is manufactured as one part with the wiper arm adapter 14. The wiper rod 12 is formed from a metal material. The wiper arm adapter 14 is formed from the same material as the wiper rod 12. The wiper arm adapter 14 is designed as a side-lock adapter. The wiper arm adapter 14 includes a pin element 18. The pin element 18 is pivotally connected to the wiper blade 102.

[0044] The fluid supply unit 24 is designed to guide wiping fluid, in particular wiper water, along the wiper rod 12 from an end of the wiper rod 12 facing away from the wiper arm adapter 14 to the wiper arm adapter 14, in particular to the wiper blade 102. The fluid supply unit 24 is arranged largely in a cavity defined by the wiper rod 12. The fluid supply unit 24 comprises exactly one fluid line 26, in particular exactly one hose element, for supplying the wiper blade 102. The exactly one fluid line 26, in particular the exactly one hose element, extends along a longitudinal axis 28 of the wiper rod 12 from an end of the wiper rod 12 facing away from the wiper arm adapter 14 to the wiper arm adapter 14, in particular to the wiper blade 102. A longitudinal axis 30 of the entire fluid line 26, in particular of the hose element, is parallel to the longitudinal axis 28 of the entire wiper rod 12, except for a maximum deviation of 10°.

[0045] The coupling unit 16 is connected, in particular fluidically, to the fluid line 26, in particular the hose element. The coupling unit 16 is designed as an end piece, in particular a head piece, for the fluid line 26, in particular the hose element, at an end of the fluid line 26, in particular the hose element, facing the wiper arm adapter 14.

[0046] The two coupling elements 20, 22 are of equal size. The two coupling elements 20, 22 are of equal shape. The two coupling elements 20, 22 are arranged at a distance from each other.

[0047] The coupling unit 16 has two suspension extensions 32, 32' for mounting on the wiper arm adapter 14. The two suspension extensions 32, 32' are arranged on opposite sides of the coupling unit 16.

[0048] The two suspension extensions 32, 32' are arranged in alignment along a longitudinal axis 34 of the pin element 18. The wiper arm adapter 14 has a cover element (not shown) which is pivotally connected to the pin element 18. The cover element has two suspension recesses which are opposite one another along the longitudinal axis 34 of the pin element 18. The two suspension extensions 32, 32' are designed to connect to the cover element, in particular to the two suspension recesses.

[0049] The longitudinal axis 34 of the pin element 18 is perpendicular to the longitudinal axis 28 of the wiper rod 12 and / or to a longitudinal axis 36 of the wiper arm adapter 14, except for deviations of a maximum of 10°.

[0050] Figures 2 and 3 show the coupling unit 16 in more detail. The coupling unit 16 defines exactly one fluid channel 38. One coupling element 20 of the two coupling elements 20, 22 defines a portion of the fluid channel 38. The fluid channel 38 is fluidically separated from one coupling element 22 of the two coupling elements 20, 22. The fluid channel 38 is formed as a cavity in the coupling unit 16. Exactly one coupling element 22 of the two coupling elements 20, 22 is solid, in particular, free of cavities.

[0051] The coupling unit 16 is designed, in particular manufactured, in two parts. The coupling unit 16 is originally designed as two separate parts, in particular manufactured as a coupling base body 40 and a channel cover 42. The coupling base body 40 and the channel cover 42 are designed to be integrally connected to one another, for example, by ultrasonic welding and / or adhesive bonding. The coupling base body 40 and the channel cover 42 are integrally connected to one another.

[0052] The two coupling elements 20, 22 are arranged on the coupling base body 40. The fluid channel 38 in the coupling unit 16 is partially defined by the coupling base body 40 and partially by the channel cover 42.

[0053] The channel cover 42 is arranged on a side of the coupling base body 40 facing away from the two coupling elements 20, 22, in particular connected to the coupling base body 40. The channel cover 42 extends over at least 50% of a maximum extent of the fluid channel 38 along a longitudinal axis 44 of the fluid channel 38.

[0054] The two coupling elements 20, 22 are configured to form a mechanical plug-in connection with the wiper blade 102, in particular the wiper blade adapter 108. One coupling element 20 of the two coupling elements 20, 22 delimits the fluid channel 38 to a circular outer contour in a cross-section perpendicular to a plug-in axis 46, 46' of the coupling element 20. The two coupling elements 20, 22 have parallel plug-in axes 46, 46'.

[0055] For a mechanical plug-in connection, the two coupling elements 20, 22 have a maximum extension along the plug-in axis 46, 46' of the two coupling elements 20, 22, which is intended to be inserted at least halfway into one of the two coupling recesses 114, 114' on the wiper blade 102. The two coupling elements 20, 22 are designed as plug-in extensions. The two coupling elements 20, 22 are designed as cylindrical elements. The two coupling elements 20, 22 have a circular outer contour in a cross-section perpendicular to the plug-in axis 46, 46' of the two coupling elements 20, 22. The two coupling elements 20, 22 have a smaller diameter at a respective free end 48, 48' of the two coupling elements 20, 22 than at a connecting end 50, 50' of the two coupling elements 20, 22. The two coupling elements 20, 22 each have two regions 54, 56, 54', 56', which extend along the plug-in axis 46, 46', with a constant diameter.The two coupling elements 20, 22 each have a central region 52, 52', which extends along the plug-in axis 46, 46', with a linearly varying diameter.

[0056] The coupling unit 16 has a supply coupling element 60. The supply coupling element 60 is designed to connect to the fluid line 26. The supply coupling element 60 has a connection direction 64 that is oriented perpendicular to connection directions 62, 62', in particular to the plug-in axes 46, 46', of the two coupling elements 20, 22 (see Fig. 3). The connection direction 64 of the supply coupling element 60 is oriented parallel to the longitudinal axis 28, 30, 110 of the wiper rod 12, the wiper arm device 10, the wiper arm adapter 14, and / or the wiper blade 102, except for a maximum deviation of 10°. The connection direction 64 of the supply coupling element 60 is oriented perpendicular to the longitudinal axis 34 of the pin element 18.

[0057] The supply coupling element 60 is designed as an elongated plug-in extension, in particular as a connection piece. The supply coupling element 60 is designed to be plugged into the fluid line 26, in particular into the hose element. The supply coupling element 60 is chamfered at a free end 58 of the supply coupling element 60 to form a blunt tip. The supply coupling element 60 is tapered behind the blunt tip. The supply coupling element 60 has a maximum extension in the connection direction 64, in particular in the plug-in direction, of the supply coupling element 60, which is at least as long as a maximum extension of the two coupling elements 20, 22 along the plug-in axes 46, 46' of the two coupling elements 20, 22. The supply coupling element 60 is fluidically connected to one coupling element 20 of the two coupling elements 20, 22.The supply coupling element 60 at least partially defines the fluid channel 38. The supply coupling element 60 is configured to provide a fluidic connection to the fluid supply unit 24. The supply coupling element 60 is arranged offset from the coupling element 20 of the two coupling elements 20, 22 along a connecting axis 66, which is aligned parallel to an imaginary shortest connecting line between the two coupling elements 20, 22, which is fluidically connected to the supply coupling element 60.

[0058] The supply coupling element 60 is arranged along a connecting axis 66, which is aligned parallel to an imaginary shortest connecting line between the two coupling elements 20, 22, without being offset from the coupling element 22 of the two coupling elements 20, 22, which is connected purely mechanically to the supply coupling element 60 and which in particular does not delimit a hollow space.

[0059] The supply coupling element 60 is fluidically connected to the coupling element 20 of the two coupling elements 20, 22, which is arranged further apart from the supply coupling element 60. The supply coupling element 60 is only mechanically connected to the coupling element 22 of the two coupling elements 20, 22, which is arranged closer to the supply coupling element 60.

[0060] The fluid channel 38 is limited to an at least substantially S-shaped or B-shaped course when viewed along the plug-in axes 46, 46' of the two coupling elements 20, 22. The supply coupling element 60 partially delimits a region of the fluid channel 38 in which the fluid channel 38 is angled by at least 45°, in particular at a right angle.

[0061] The coupling element 20 of the two coupling elements 20, 22 delimits a portion of the fluid channel 38, which has a straight line. The coupling unit 16, in particular a fluid bridge element 74 of the coupling unit 16, between the supply coupling element 60 and the coupling element 20, which is in particular fluidically connected to the supply coupling element 60, delimits the fluid channel 38 to a curved, in particular rounded, path, in particular by 90°.

[0062] The coupling unit 16 has a bridge element 68. The bridge element 68 connects the two coupling elements 20, 22. The bridge element 68 is partially arranged between the two coupling elements 20, 22. The bridge element 68 is designed as a solid element, in particular, without any cavity. The two coupling elements 20, 22 are arranged spaced apart from one another along the longitudinal axis 34 of the pin element 18.

[0063] The bridge element 68 extends along the longitudinal axis 34 of the pin element 18 between the two coupling elements 20, 22 from one coupling element 20, 22 to the other coupling element 20, 22. A longitudinal axis 72 of the bridge element 68 is parallel to the longitudinal axis 34 of the pin element 18. The longitudinal axis 72 of the bridge element 68 is parallel to the connection axis 66. The bridge element 68 is designed differently from the fluid bridge element 74. The coupling unit 16 has the fluid bridge element 74.

[0064] The wiper blade adapter 108 has a locking element 70 which is intended to receive the bridge element 68 for a locking connection with the bridge element 68 (see Fig. 1).

[0065] A fluid channel unit 116, which is arranged facing a free end of the pin element 18, of the two fluid channel units 116, 116' is fluidly connected to the coupling unit 16.

[0066] The fluid channel unit 116, which is arranged facing a wiping side of the wiper blade 102, wherein the wiping side is defined in particular with respect to a vehicle window on which the wiper system 100 is arranged, of the two fluid channel units 116, 116' of the wiper blade 102 is fluidically connected to the coupling unit 16. The wiping side is a side of the wiper blade 102 arranged facing the free end of the pin element 18.

Claims

Claims 1. Wiper arm device with at least one wiper arm adapter (14) for coupling with at least one wiper blade (102) and with at least one fluid supply unit (24) for supplying the at least one wiper blade (102) with wiping fluid, which has at least one fluid line (26), characterized in that the fluid supply unit (24) has a coupling unit (16) which is designed as a head piece for the at least one fluid line (26) and which has at least two coupling elements (20, 22) which are designed for a mechanical connection with the at least one wiper blade (102) and wherein exactly one coupling element (20) of the at least two coupling elements (20, 22) is designed for a fluidic connection with the at least one wiper blade (102).

2. Wiper arm device according to claim 1, characterized in that the at least two coupling elements (20, 22) are formed into a mechanical plug connection with the at least one wiper blade (102).

3. Wiper arm device according to claim 1 or 2, characterized in that the at least two coupling elements (20, 22) are designed as plug-in extensions.

4. Wiper arm device according to one of the preceding claims, characterized in that a coupling unit (16) has at least one supply coupling element (60) for connection with the at least one fluid line (26), which has a connection direction (64) that is oriented at least substantially perpendicular to connection directions (62, 62') of the at least two coupling elements (20, 22).

5. Wiper arm device according to one of the preceding claims, characterized in that a coupling unit (16) has at least one supply coupling element (60) for connection with the at least one fluid line (26), which is fluidically connected to a coupling element (20) of the at least two coupling elements (20, 22).

6. Wiper arm device according to one of the preceding claims, characterized in that a coupling unit (16) has at least one supply coupling element (60) for a connection with the at least one fluid line (26), which is fluidically connected to a coupling element (20) of the at least two coupling elements (20, 22), which is arranged further away from the at least one supply coupling element (60).

7. Wiper arm device according to one of the preceding claims, characterized in that the coupling unit (16) has at least one bridge element (68) which connects the at least two coupling elements (20, 22) and which is arranged at least partially between the at least two coupling elements (20, 22).

8. Wiper system comprising at least one wiper blade (102) and at least one wiper arm device (10) according to any one of claims 1 to 7.

9. Wiper system according to claim 8, characterized in that the at least one wiper blade (102) has at least two fluidically separated fluid channel units (116, 116'), of which exactly one is fluidically connected to the coupling unit (16).

10. Wiper system at least according to claim 8, characterized in that the at least one wiper arm adapter (14) has at least one pin element (18) for a pivotable connection with the wiper blade (102), wherein the at least one wiper blade (102) has at least two fluidically separated fluid channel units (116, 116'), one of which, facing a free end of the at least one pin element (18), is fluidically connected to the coupling unit (16).

11. Coupling unit of a wiper arm device (10) according to any one of claims 1 to 7.

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