阅读说明：本技术 窗板刮水器 (Window wiper ) 是由 T·博斯尼克 于 2020-03-25 设计创作，主要内容包括：本发明涉及一种窗板刮水器(10),所述窗板刮水器：具有至少一条刮水臂(20),所述刮水臂具有至少一个流体联接单元(22)；具有刮水片(40),所述刮水片具有至少一个用于与所述刮水臂(20)相耦合的刮水片转接器(42),并且所述刮水片以能够移除的方式来设计；并且具有至少一个连接单元(60),所述连接单元具有至少一条用于进行流体穿流的流体通道(68)。在此建议,所述连接单元(60)具有至少一个连接块(62),所述连接块被设置用于在流体技术上将所述流体联接单元(22)与所述刮水片转接器(42)连接起来。(The present invention relates to a window panel wiper (10) that: having at least one wiper arm (20) with at least one fluid coupling unit (22); having a wiper blade (40) which has at least one wiper blade adapter (42) for coupling to the wiper arm (20) and which is designed in a removable manner; and at least one connection unit (60) having at least one fluid channel (68) for the passage of a fluid. It is proposed that the connecting unit (60) has at least one connecting piece (62) which is provided for fluidically connecting the fluid coupling unit (22) to the wiper blade adapter (42).)

1. Window wiper (10): having at least one wiper arm (20) with at least one fluid coupling unit (22); and having a wiper blade (40) which has at least one wiper blade adapter (42) for coupling to the wiper arm (20) and which is designed in a removable manner; and having at least one connection unit 60 (60) having at least one fluid channel (68) for the passage of a fluid, characterized in that the connection unit 60 (60) has at least one connection block (62) which is provided for fluidically connecting the fluid coupling unit (22) to the wiper blade adapter (42).

2. The window panel wiper (10) according to claim 1, wherein the fluid channel has a directional deviation 72 (72) inside the connecting block 62 (62).

3. The window wiper (10) according to one of the preceding claims, wherein the connecting block (62) is provided for a fixed and/or fluid-tight plug connection with a plug-in valve (44) of the wiper blade adapter (42).

4. The window panel wiper (10) according to any one of the preceding claims, wherein the connecting block (62) is at least substantially configured as a polyhedron.

5. The window wiper (10) according to one of the preceding claims, wherein the angle between a main extension straight line of the connecting block 62 (62) and a main extension plane of the wiper blade adapter (42) remains at least substantially constant at least during a movement of the wiper blade (40).

6. The window panel wiper (10) according to any one of the preceding claims, wherein the connecting block (62) is at least substantially integrally constructed.

7. The window panel wiper (10) according to any of the preceding claims, wherein said attachment unit 60 (60) is at least partially rotatable and/or pliable.

8. The window panel wiper (10) according to one of the preceding claims, wherein the connecting unit 60 (60) has at least one hose-shaped line element (64) which at least partially has the fluid channel (68) and which is provided for a fluidic connection with the fluid coupling unit (22).

9. The window panel wiper (10) according to any of the preceding claims, wherein said connection unit (60) has at least one further fluid channel (70) for fluid flow therethrough.

10. The window panel wiper (10) according to claim 9, wherein the connecting unit 60 (60) has at least one further line element (66) which at least partially has the further fluid channel (70) and which is provided for a fluidic connection to the fluid coupling unit (22).

11. The window wiper (10) according to claim 10, wherein the connecting block (62) at least partially has the further fluid channel (70).

12. Connection unit (60) for a windscreen wiper (10) according to any of the preceding claims.

13. Wiper blade (40) for a windscreen wiper (10) according to any of the preceding claims.

14. Method for mounting at least one windscreen wiper (10) according to any of the claims 1 to 11.

Technical Field

The present invention relates to a window panel wiper.

Background

A windscreen wiper has already been proposed, which has at least one wiper arm, at least one fluid channel arranged on the wiper arm, and at least one connecting unit, wherein the connecting unit has at least one connecting element for fluidically connecting the fluid channel to the wiper blade.

Disclosure of Invention

The present invention relates to a windshield wiper, comprising: at least one wiper arm having at least one fluid coupling unit; a wiper blade having at least one wiper blade adapter for coupling with a wiper arm, and which is designed in a removable manner; and at least one connection unit having at least one fluid channel for fluid flow therethrough.

It is proposed that the connecting unit has at least one connecting piece, which is provided to fluidically connect the fluid coupling unit and the wiper blade adapter.

The windshield wiper is preferably provided for use in a vehicle, in particular a motor vehicle. The window wiper is provided in particular for cleaning a window, in particular a front window and/or a rear window, of a vehicle. Preferably, the window wiper has at least one fluid system, in particular for cleaning the window. In particular, the fluid system has at least one fluid unit, which is preferably provided for fluid transport. Preferably, the fluid system has at least one fluid receiving container which is provided for supplying a fluid. In particular, the fluid system is provided for conveying a fluid from a fluid receiving container via a fluid unit onto a front window and/or a rear window of a vehicle. In particular, the wiper blade has at least one fluid outlet unit which is preferably provided for discharging, in particular spraying, a fluid onto the window panes for cleaning the window panes. Preferably the fluid is configured to scrape water. The wiper blade, in particular the wiper lip of the wiper blade, is preferably provided for wiping the window panes in order to clean them. In particular, the wiper blade is provided for wiping dirt present on the window panes and/or fluid supplied to the window panes by the fluid outlet unit away from the window panes. The wiper arm is preferably provided for moving the wiper blade, which is fastened to the wiper arm, in particular by means of a wiper blade adapter, over the window pane for cleaning the window pane.

Preferably, the fluid coupling unit and/or the fluid output unit form at least partially a fluid unit. In particular, the fluid outlet unit and/or the fluid coupling unit is/are channel-like recesses in the wiper arm and/or wiper blade. As an alternative, the fluid outlet unit and/or the fluid coupling unit is/are at least partially designed as a tube and/or a hose, particularly preferably as an elastic hose. It is conceivable that the fluid outlet unit and/or the fluid coupling unit is held by a bracket on the wiper arm and/or the wiper blade. Preferably, the wiper arm is arranged on at least one drive shaft of a wiper drive of a window wiper of a vehicle. In particular, the wiper arm can be driven by the wiper drive for movement relative to the window pane. Preferably, the wiper arm is at least partially made of metal. Alternatively or additionally, it is conceivable for the wiper arm to be formed at least partially from plastic, from composite materials or from other materials which appear to be of interest to the person skilled in the art. "provided" is intended to mean, in particular, being specially designed, specially constructed. An "object is provided for a specific function" is intended to mean, in particular, that the object fulfills and/or performs this specific function in at least one application and/or operating state.

Preferably "fluid channel" shall mean a channel-like element and/or recess for guiding a fluid. Preferably, the fluid channel has an at least substantially circular cross-section. Alternatively, it is conceivable for the fluid channel to have a polygonal, in particular at least substantially square, oval or other cross-sections which are relevant to the person skilled in the art. In particular, the fluid channel forms only one flow line at least in the interior of the connection unit, wherein preferably the connection unit has only two channel openings. In particular, the fluid channel is not branched at least in the interior of the connection unit.

A "wiper blade adapter" is to be understood in this respect to mean, in particular, an adapter which has a contact region with respect to a wiper blade element of the wiper blade and is in particular connected to the wiper blade element in a non-releasable manner and, in particular, has at least one coupling element which is provided for providing a coupling and/or a contact with a corresponding coupling element of the wiper arm, in particular of the wiper arm. In particular, a coupling between the wiper blade adapter and the wiper arm, in particular a coupling between a coupling element of the wiper blade adapter and a corresponding coupling element of the wiper arm, can be released.

Preferably, the connection unit is provided for connecting the fluid coupling unit to the fluid outlet unit, in particular in terms of fluid technology. In at least one mounted state, the connecting unit is preferably connected to the wiper blade adapter and/or the wiper arm, in particular to a fluid coupling unit of the wiper blade adapter, in a force-fitting and/or form-fitting manner. In particular, the connecting unit is designed as a coupling element that is different from the wiper blade adapter. Preferably, only the connecting unit is provided for fluidically connecting the wiper arm to the wiper blade.

A "connecting piece" is intended to mean, in particular, an element of the connecting unit, the cross section of which perpendicular to the main direction of extension of the connecting piece is significantly larger than, in particular, the cross section of the fluid channels in the connecting piece perpendicular to the main direction of extension of the fluid channels, wherein preferably the area of the cross section of the connecting piece is greater than the area of the cross section of the fluid channels, in particular by at least 1.5 times, advantageously by at least 2 times, preferably by at least 3 times and particularly advantageously by at least 4 times. The "main direction of extension" of an object is intended to mean, in particular, a direction which runs parallel to the longest edge of the geometrically smallest cuboid which also completely surrounds the object.

By means of the configuration of the wiper arm device according to the invention, a simple connection can advantageously be produced between the fluid coupling unit and the wiper blade, in particular the wiper blade adapter. Furthermore, a connecting unit can advantageously be provided which can be easily removed when replacing the wiper arm and which is connected to a new wiper arm. Furthermore, a connection unit can advantageously be provided which is designed as a structure that can be released and/or coupled by hand. Furthermore, a connection region, in particular between the fluid coupling unit and the connection unit and/or between the connection unit and the wiper blade adapter, can advantageously be protected from external influences. This advantageously reduces the risk of injury to the operator when coupling and/or uncoupling the connection unit. Furthermore, errors in the coupling of the connection unit and/or the fluid channel of the connection unit to the fluid coupling unit and/or the wiper arm can advantageously be avoided, whereby in particular the outflow of fluid and the damage caused thereby can be avoided. Furthermore, the aesthetic design of the windscreen wiper can be advantageously improved, since the wiper blade adapter is provided both for the mechanical coupling and for the fluidic coupling with the wiper arm.

It is also proposed that the fluid channel has a directional deviation within the connecting piece. "directional deviation" is intended to mean, in particular, that the direction of flow through the connecting element changes along the directional deviation, in particular relative to the main plane of extension of the connecting element. The "main plane of extension" of an object is intended to mean, in particular, a plane which runs parallel to the largest side of an imaginary smallest cuboid, which surrounds the object exactly in its entirety, and in particular passes through the center point of this cuboid. In particular, the direction deviation has at least one angular change, preferably an angular change relative to the main plane of extension of the connecting piece, in particular between 10 ° and 170 °, advantageously between 30 ° and 150 °, preferably between 50 ° and 130 °, particularly advantageously between 70 ° and 110 ° and particularly preferably between 80 ° and 100 °. It is particularly preferred that the direction deviation has at least one angular change of at least substantially 90 °. Preferably, the fluid channel has a bend and/or a corner, in particular along the direction deviation, in the interior of the connecting piece. "corner" shall mean, in particular, a curved portion having a radius of at least approximately 0 mm. Thereby, a simple change of direction inside the connection unit can advantageously be provided. In addition, the operating comfort can be advantageously increased, in particular when changing wiper blades, since the connecting piece is advantageously at least substantially relieved of bending when connecting the connecting piece to the wiper blade adapter and/or the fluid outlet unit.

Furthermore, it is proposed that the connecting piece be provided for a fixed and/or fluid-tight plug connection to a plug valve of the wiper blade adapter. Preferably, the connecting piece has at least one recess which is provided for a plug-in connection with a plug-in valve of a wiper blade adapter. The straight line of extent of the recess of the connecting piece is preferably at least substantially parallel, in particular identical, to the direction of flow through the interior of the plug-in valve. "substantially parallel" is intended to mean, in particular, an orientation of a direction relative to a reference direction, in particular in one plane, the direction having a deviation relative to the reference direction of, in particular, less than 8 °, advantageously less than 5 °, and particularly advantageously less than 2 °. In particular, the plug-in valve of the wiper blade adapter forms at least in part a fluid outlet unit. The term "straight extension line" of an object is intended to mean, in particular, a line which runs parallel to the longest edge of the geometrically smallest cuboid which also completely surrounds the object. In particular, the recess is integrally connected with the fluid channel of the connection unit. Preferably, the plug-in valve of the wiper blade adapter is at least substantially cylindrical. However, alternative valves can also be envisaged which in particular provide a screw connection, a snap connection, a magnetic connection and/or the like. This advantageously increases the flexibility, since a quick and simple connection is provided when the wiper blade is replaced by means of the plug-in valve. Furthermore, the operating comfort can advantageously be increased, in particular when changing wiper blades, in particular because connecting units which are usually arranged inaccessible can be easily removed and reconnected. In addition, a construction that is as simple as possible for a fluid-tight connection between the connecting unit and the wiper blade adapter can advantageously be provided.

It is also proposed that the connecting piece be at least substantially polyhedral in shape. A "polyhedral" object is intended to mean, in particular, an object which is at least substantially defined only by straight surfaces, wherein the object has at least a number of surfaces which is, in particular, between 12 and 4, advantageously between 5 and 10, and particularly advantageously between 6 and 8. Preferably, the connecting piece is at least substantially square. This advantageously increases the operating comfort, since the grippability of the connecting piece is optimized. Furthermore, the polyhedral connecting piece can be advantageously used to reduce the production costs and production outlay.

It is furthermore proposed that the angle between a main extension line of the connecting piece and a main extension plane of the wiper blade adapter remains at least substantially constant at least during a movement of the wiper blade. Preferably, the angle between the main plane of extension of the connecting piece and the main plane of extension of the wiper arm is at least substantially parallel. In particular, the connecting pieces move together at least substantially synchronously when the wiper arm, in particular the wiper blade adapter, is moved. Preferably, at least one surface of the connecting piece is at least substantially completely in contact with a surface of the wiper blade adapter. In this way, a fluid-tight connection between the connecting unit, in particular the connecting block, and the wiper blade adapter can be advantageously ensured. Furthermore, a constant fluid flow through can advantageously be provided.

Furthermore, it is proposed that the connecting piece is formed at least substantially in one piece. "integrally" shall mean in particular that it is formed in one piece. The one piece is preferably produced from a single blank, a block and/or a cast part, particularly preferably by injection molding, in particular by single-component and/or multi-component injection molding. Thereby, the shape stability of the connection block can be advantageously improved. Furthermore, the production of the connecting unit, in particular the connecting block, can advantageously be further simplified.

It is furthermore proposed that the connection unit is at least partially rotatable (rotanschlaff) and/or flexible (biegeschlaff). Preferably, the connection unit is provided only for a fluidic connection between the fluid coupling unit and the wiper blade adapter. In particular, the connecting unit is at least partially, preferably completely, made of an elastic material. In particular, the force-transmitting coupling between the coupling element of the wiper blade adapter and the coupling element of the wiper arm is preferably designed at least substantially separately from the fluidic connection. The flexibility of the connection unit can thereby be advantageously increased, since the connection unit is independent of the mechanical coupling. Furthermore, a fluid-tight connection can advantageously be further improved.

It is further proposed that the connection unit has at least one tubular line element which at least partially has the fluid channel and which is provided for a fluidic connection to a fluid coupling unit. "hose-like" should in particular mean that the element has a main extension which is much greater, in particular at least 2 times greater, advantageously at least 3 times greater, preferably at least 4 times greater and particularly advantageously at least 5 times greater, than the extension perpendicular to this main extension. "main extension" is intended to mean, in particular, an extension in a main direction of extension, which is defined by an outer edge of the object. In particular, the shape of the line element corresponds at least substantially to the shape of the fluid channel. In particular, the line element is at least substantially cylindrical. Preferably, the line element forms only a wall for the fluid channel. In particular, the fluid coupling unit has at least one plug valve for the plug connection to the line element. In this way, a fluid-tight connection can advantageously be ensured during a movement of the wiper arm and/or wiper blade.

It is also proposed that the connection unit has at least one further fluid channel for the fluid to flow through. The fluid guidance in the further fluid channel is at least substantially performed in accordance with the fluid guidance in the fluid channel. In this way, the fluid supply during the wiping operation of the windshield wiper can advantageously be further optimized. Furthermore, the supply of fluid in the reciprocating movement can be advantageously ensured.

It is furthermore proposed that the connection unit has at least one further line element which at least partially has the further fluid channel and which is provided for a fluidic connection to the fluid coupling unit. In particular, the line element is at least substantially identical in construction to the further line element. Preferably, the further line element is connected integrally to the connecting piece. Thereby, the fluid supply can be advantageously further simplified. Furthermore, the fluid supply in the reciprocating movement can advantageously be further optimized.

It is furthermore proposed that the connecting piece has the further fluid channel at least in sections. Preferably, the connecting block has at least the fluid channel and the further fluid channel. In particular, the connecting piece has at least one further recess, which is provided for a plug connection to a further plug valve of the fluid coupling unit. Thereby, the manufacturing cost can be advantageously further reduced. In addition, the operator comfort can advantageously be further increased, since only one connecting piece is provided for two plug connections to the wiper blade adapter.

Furthermore, a connecting unit for a windshield wiper according to the invention is proposed. The connecting unit preferably has at least one connecting block and/or a line element for fluid transfer, wherein the connecting block and/or the line element preferably has at least one interface for coupling to a wiper arm and/or a wiper blade, in particular a wiper blade adapter of a wiper blade. In particular, the connecting unit is formed in one piece. In this way, a connection unit for fluid transfer can advantageously be provided, which is designed at least substantially independently of the wiper arm and/or wiper blade and/or can be used. It is advantageously possible to provide a connecting unit which can be reused when replacing the wiper blade or the window wiper.

Furthermore, a wiper blade for a windshield wiper according to the invention is proposed. Preferably, the wiper blade, in particular a wiper blade adapter of the wiper blade, has at least one interface for coupling, preferably for fluidic connection, to a connecting block. The interface is provided for providing a fluid connection for a fluid outlet unit of a wiper blade. In particular, the interface is designed as a plug-in valve for coupling to a connection block. In this way, a wiper blade, in particular with a fluid outlet unit, can be advantageously provided, which can be connected to the wiper arm and/or the fluid coupling unit quickly and easily.

Furthermore, a method for mounting at least one windshield wiper according to the invention is proposed. Preferably, the method is provided for changing a wiper blade of a windshield wiper. In particular, the fluidic connection is released in at least one first method step. Preferably, in the first method step, at least one plug connection between a plug valve of the wiper blade adapter and a recess of the connecting piece is released. Preferably, in the first method step, at least one plug connection between the line element and the plug valve of the fluid coupling unit is released. Preferably, in at least one second method step, at least one force-transmitting connection between the wiper blade adapter and the wiper arm is released. Thereby, a method can advantageously be provided which enables an easy and fast mounting and/or dismounting of the wiper blade. In addition, a high level of operating comfort during the mounting and/or demounting of the wiper blade can advantageously be achieved.

The windshield wiper according to the invention, the connecting unit according to the invention, the wiper blade according to the invention and/or the method according to the invention should not be limited to the applications and embodiments described above. In particular, the windshield wiper according to the invention, the connecting unit according to the invention, the wiper blade according to the invention and/or the method according to the invention can have a different number of individual elements, components and units and method steps than those mentioned in this respect in order to satisfy the operating principle described in this connection. Furthermore, for the numerical ranges specified in this disclosure, values within the limits mentioned should also be regarded as being disclosed and can be used at will.

Drawings

Other advantages are derived from the following description of the figures. An embodiment of the invention is shown in the drawings. The figures, description and claims contain a number of features in combination. Those skilled in the art will also consider these features individually and generalize them to other meaningful combinations as appropriate.

Here:

fig. 1 shows a part of a windscreen wiper according to the invention, comprising a wiper blade and a connecting unit, which fluidly connects at least a wiper arm to the wiper blade,

figure 2 shows a part of a windscreen wiper in a top view,

figure 3 shows a wiper blade adapter of the wiper blade and a connecting unit connected with the wiper blade adapter,

fig. 4 shows a wiper blade adapter and at least partially the connecting unit, wherein the connecting unit is shown in a sectional view,

figure 5 shows the connection unit with the connection block and the pipe elements,

figure 6 shows the connection unit with the connection block and the pipe elements in a top view,

fig. 7 shows a state in which a portion of the window wiper having the wiper arm and the wiper blade is in a detached state.

Detailed Description

Fig. 1 shows a part of the window wiper 10 in a mounted state. Fig. 2 shows a portion of the window panel wiper 10 in a plan view. The window wiper 10 is provided for use in a motor vehicle. The window wiper 10 is provided for washing a front window and/or a rear window of a vehicle. The windshield wiper 10 has at least one fluid system 12. The fluid system 12 is configured for fluid delivery. The fluid system 12 has at least one fluid cell 14. The fluid system 12 has at least one fluid receiving container. The fluid system 12 is configured to deliver fluid from a fluid receiving container to a front and/or rear window panel of a vehicle via the fluid unit 14. The fluid is configured to scrape water.

The windshield wiper 10 has at least one wiper arm 20. The wiper arm 20 is arranged on at least one drive shaft of a wiper drive of a window wiper 10 of a vehicle. The wiper arm 20 can be driven by a wiper drive for movement relative to the window panel. The wiper arm 20 is at least partially made of metal. Alternatively or additionally, the wiper arm 20 is at least partially made of plastic, composite material or the like. The wiper arm 20 has at least one fluid coupling unit 22. The fluid coupling unit 22 at least partially forms a fluid unit 14 for transporting a fluid. The fluid coupling unit 22 has at least one channel-like recess 74 for the fluid to flow through. The fluid coupling unit 22 is fixed to the wiper arm 20 by a bracket.

The windshield wiper 10 has at least one wiper blade 40. The fluid coupling unit 22 is provided for connecting a fluid receiving container of a vehicle with a wiper blade 40. The wiper blade 40 has at least one fluid outlet unit 46. The fluid outlet unit 46 at least partially forms a fluid unit 14 for conveying a fluid. The fluid outlet unit 46 is provided for discharging and/or spraying fluid onto the window panels for the purpose of cleaning the window panels. The fluid outlet unit 46 has at least one channel-like recess 74 for the fluid to flow through. The wiper blade 40 is provided to wipe the window plates for cleaning the window plates. The wiper blade 40 is provided to wipe fluid delivered to the louvers by the fluid delivery unit 46 away from the louvers. The wiper blade 40 has at least one wiper blade adapter 42. The wiper blade adapter 42 is provided for coupling to the wiper arm 20. The wiper blade adapter 42 has at least one contact region relative to a wiper blade element of the wiper blade 40. The wiper blade adapter 42 is connected to the wiper blade element in a non-releasable manner. The wiper blade adapter 42 has at least one coupling element 48, which is provided to provide coupling and/or contact of the wiper blade 40 with the wiper arm 20. The wiper arm 20 has at least one corresponding coupling element 26, which is provided for coupling with a coupling element 48 of the wiper blade adapter 42. The coupling element 48 of the wiper blade adapter 42 and the coupling element 26 of the wiper arm 20 are provided for force transmission between the wiper arm 20 and the wiper blade 40. The coupling element 48 of the wiper blade adapter 42 and the corresponding coupling element 26 of the wiper arm 20 are arranged so as to be able to pivot at least partially relative to one another. The coupling element 48 of the wiper blade adapter 42 and the corresponding coupling element 26 of the wiper arm 20 are provided for force transmission between the wiper arm 20 and the wiper blade 40. The wiper arm 20 is provided for moving the wiper blade 40, which is fastened to the wiper arm 20 by means of the wiper blade adapter 42, over a window pane for cleaning the window pane. The wiper blade 40 is designed in a removable manner. The coupling between the coupling element 48 of the wiper blade adapter 42 and the corresponding coupling element 26 of the wiper arm 20 is releasable.

The windshield wiper 10 has at least one connecting unit 60. The connecting unit 60 is provided for fluidically connecting the wiper arm 20 to the wiper blade adapter 42. The connection unit 60 connects at least the fluid coupling unit 22 with the fluid output unit 46. The connecting unit 60 is connected to the wiper blade adapter 42 for fluid flow. The connection unit 60 is provided only for a fluidic connection between the fluid coupling unit 22 and the wiper blade adapter 42. The connection unit 60 is at least partly rotatable and/or flexible. The connection unit 60 is at least partially made of a resilient material. The connecting unit 60 is formed at least substantially separately from the coupling element 48 of the wiper blade adapter 42 and the corresponding coupling element 26 of the wiper arm 20.

Fig. 3 shows the wiper blade adapter 42 and at least partially the connecting unit 60. Fig. 4 shows the wiper blade adapter 42 and at least partially the connecting unit 60, the connecting unit 60 being shown in a sectional view.

The connection unit 60 has at least one fluid channel 68 for the passage of a fluid. The fluid channel 68 at least partially forms a fluid unit 14 for transporting a fluid. The fluid channel 68 has an at least substantially circular cross-section. The fluid passage 68 forms only one flow line at least inside the connection unit 60. The connection unit 60 has only two passage openings. The fluid channel 68 is at least unbranched in the interior of the connection unit 60. The fluid channel 68 is provided for conducting fluid from the fluid coupling unit 22 to the fluid output unit 46. The connection unit 60 has at least one further fluid channel 70 for the fluid to flow through. The fluid guidance in the further fluid channel 70 is at least substantially dependent on the fluid guidance in the fluid channel 68.

The connection unit 60 has at least one connection block 62. The connecting piece 62 is provided for fluidically connecting the fluid coupling unit 22 to the wiper blade adapter 42. The connecting block 62 has at least in part a fluid passage 68. The connecting block 62 has, at least in part, an additional fluid channel 70. The connecting piece 62 is at least substantially integrally formed. The connecting piece 62 is at least substantially polyhedral in shape. The body of the connecting block 62 is substantially defined by surfaces only. The connecting piece 62 is at least substantially square. The angle between a main extension line of the connecting piece 62 and a main extension plane of the wiper blade adapter 42 remains at least substantially constant, at least during a movement of the wiper blade 40. The angle between the main plane of extension of the connecting piece 62 and the main plane of extension of the wiper arm 20 is at least substantially parallel during movement of the wiper blade 40. The connecting pieces 62 move together at least substantially synchronously when the wiper arm 20 moves. At least one surface of the connecting piece 62 is at least substantially completely in contact with a surface of the wiper blade adapter 42 during a movement of the wiper blade 40.

The connecting piece 62 is provided for a fixed plug connection to the plug valve 44 of the wiper blade adapter 42. The connecting piece 62 is provided for a fluid-tight plug connection to the plug valve 44 of the wiper blade adapter 42. The connecting block 62 has at least one notch 74. The recess 74 is provided for a plug connection to the plug valve 44 of the wiper blade adapter 42. The straight extension of the recess 74 of the connecting piece 62 is at least substantially parallel to the flow direction inside the plug valve 44. The plug-in valve 44 of the wiper blade adapter 42 at least partially forms a fluid outlet unit 46. The recess 74 is integrally connected with the fluid passage 68 of the connection unit 60. The recess 74 forms an enlarged cross-sectional portion of the fluid passage 68. The plug-in valve 44 of the wiper blade adapter 42 is at least substantially cylindrical. The recess 74 is at least substantially cylindrical. When the plug-in connection is in use, the recess 74 encloses the plug-in valve 44 of the wiper blade adapter 42 in a fluid-tight manner. The connecting piece 62 has at least one further recess 74, which is provided for a plug connection to a further plug valve 44 of the wiper blade adapter 42. The further recess 74 is integrally connected with the further fluid channel 70 of the connection unit 60. The additional recess 74 forms an enlarged cross-sectional portion of the additional fluid passage 70.

The connection unit 60 has at least one tubular line element 64. The line element 64 has at least in part a fluid passage 68. The line element 64 is provided for a fluidic connection to the fluid coupling unit 22. The shape of the line element 64 corresponds at least substantially to the shape of the fluid channel 68. The conduit element 64 is at least substantially cylindrical. The line element 64 merely forms a wall for the fluid channel 68. The fluid coupling unit 22 has at least one plug valve 24 for a plug connection to the line element 64. The plug valve 24 of the fluid coupling unit 22 has at least one return hook (Wiederhaken) for a fixed and fluid-tight plug connection. The conduit element 64 is at least partially rotatable and/or pliable. The piping element 64 and the connection block 62 are integrally connected to each other. The line element 64 and the connecting piece 62 are at least substantially formed from one part. The connection unit 60 has at least one further line element 66. The line element 64 is at least substantially identical in construction to the further line element 66. The further line element 66 has at least in part a further fluid channel 70. The further line element 66 is provided for a fluidic connection to the fluid coupling unit 22. The further line element 66 is connected integrally to the connecting piece 62. The fluid coupling unit 22 has at least one further plug valve 24 for a plug connection to a further line element 66.

Fig. 5 and 6 show the connection unit 60 with the connection block 62 and with a line element 64 and a further line element 66. The line element 64 and the further line element 66 are connected to the connecting piece 62 on the same surface. At least by means of the center point, the connection plane between the connecting piece 62 and the line element 64 and the further line element 66 forms a straight connection line which is at least substantially parallel to the main plane of extension of the connecting piece 62.

The recess 74 and the further recess 74 are arranged offset within the connecting piece 62. The connecting piece 62 has at least one coupling surface 76, which has at least the connection surface of the connecting piece 62 to the line element 64. The recess 74 and the further recess 74 are arranged offset relative to a coupling face 76 of the connecting piece 62. The flow-through length of the fluid channel 68 differs from the flow-through length of the further fluid channel 70. The connecting straight line formed by the center points of the recesses 74 is arranged obliquely with respect to the main extension straight line of the connecting piece 62. The recesses 74 have different distances of the coupling face 76 of the connecting piece 62 within the connecting piece 62. The fluid channel 68 and the further fluid channel 70 are at least substantially parallel. The line element 64 and the further line element 66 are at least substantially parallel. The fluid channel 68 is inclined relative to the coupling face 76 of the connecting block 62. The line elements 64 are inclined relative to the coupling surface 76 of the connecting piece 62. The angle between the line element 64 and the coupling surface 76 is at least between 10 ° and 45 °. The angle between the fluid channel 68 and the coupling surface 76 is at least between 10 ° and 45 °.

The connecting unit 60 has at least one direction deviation 72. The direction deviation portion 72 diverts the fluid. The fluid passage 68 has the directional offset 72. The fluid channel 68 has the directional offset 72 within the connecting block 62. The direction deviation 72 has at least one angular variation with respect to the main extension plane of the connecting piece 62. The direction deviation has at least one angular change of at least substantially 90 °. The fluid channel 68 is formed as a corner in the connecting piece 62 along the direction offset 72. Alternatively, the direction deviation 72 is formed as a bend in the connecting piece 62. The fluid channel 68 has at least two straight flow lines, which are formed at least substantially by a center point of the fluid channel 68. The straight flow lines of the fluid channels 68 intersect in a direction offset 72 in the connecting piece 62. The flow lines of the fluid channels 68 are at least substantially perpendicular to each other. The fluid channel 68 is at least substantially L-shaped in the connection unit 60. The further fluid channel 68 has a further directional offset 72 at least substantially in accordance with the directional offset 72 of the fluid channel 68.

Fig. 7 shows a portion of the windshield wiper 10 having the wiper arm 20 and the wiper blade 40 in a detached state. A method is proposed for removing and/or mounting the window wiper 10. In particular, a method for changing a wiper blade 40 is proposed. In at least one first method step, the fluidic connection is released. In the first method step, at least one plug connection between the plug valve 44 of the wiper blade adapter 42 and the recess 74 of the connecting piece 62 is released. The plug connection between the plug valve 44 of the wiper blade adapter 42 and the recess 74 of the connecting piece 62 is released by hand. In the first method step, at least one plug connection between the line element 64 and the plug valve 24 of the fluid coupling unit 22 is released. In the first method step, at least one plug connection between the further line element 66 and the further plug valve 24 of the fluid coupling unit 22 is released. In the first method step, the connecting unit 60 is removed. In the first method step, the fluid connection between the wiper arm 20 and the wiper blade 40 is interrupted. In at least one second method step, at least the force-transmitting connection between the wiper blade adapter 42 and the wiper arm 20 is released. In the second method step, at least the coupling element 48 of the wiper blade adapter 42 is removed from the corresponding coupling element 26 of the wiper arm 20. In a third method step, a further wiper blade is connected to the wiper arm 20 in a force-transmitting manner. In a fourth method step, the connecting unit 60 is connected to the wiper arm 20 and to a further wiper blade adapter of the further wiper blade.