DE102009048212A1 - Flat aqua-wiper blade for use in windscreen wiper system of vehicle, has flexible liquid line and/or flexible electrical connector extending from connection element to wiper blade-side adapter part in longitudinal direction - Google Patents

Abstract

The aqua-wiper blade has a wiper blade adapter for releasable fixation of the blade to a wiper arm of a windscreen wiper system. A wiper arm-side adapter part (19) projects over a wiper blade-side adapter part in a wiper blade longitudinal direction with sections (19.2, 19.3). An outer fluid port and/or an outer electrical port is provided in an area of ends of the sections. A flexible liquid line (34) and/or a flexible electrical connector (35) extend from an electrical and hydraulic connection element (29) to the wiper blade-side adapter part in the longitudinal direction.

Description

The invention relates to a wiper blade according to the preamble of claim 1 and in particular to a so-called aqua wiper blade, d. H. to a wiper blade, which has at least one at least one injection port forming injection channel, and indeed for discharging a cleaning and washing liquid on a vehicle window during the wiping operation. Furthermore, the invention relates to a wiper blade adapter according to the preamble of claim 11.

Wiper blades for use in windscreen wiper systems of vehicles are known in different designs. In particular flat wiper blades are also known (US Pat. DE 10 2004 056 835 A1 . DE 100 00 372 A1 ), which generally consist of a wiper blade extending in wiper blade longitudinal direction and forming a wiper lip of a rubber-elastic material and of a strip-like or profile rail-shaped wiper blade body (wiper strip) with at least one spring rail on which (wiper blade body) of the squeegee is held. About a wiper blade adapter, the respective wiper blade is detachably connected to the wiper arm of the windshield wiper system, wherein the respective wiper blade adapter is at least two parts, consisting of a wischarmseitigen adapter part connected at least in the assembled state with the wiper arm and from a provided on the wiper blade wiper blade side adapter part which the Wiper blade or its wiper blade body and / or the spring rail and / or the squeegee on the wiper blade top overlaps like a rider. The two adapter parts are hinged to each other via an adapter joint. On at least one wiper blade longitudinal side is provided in these known flat wiper blades, a spray or distribution channel with a plurality of nozzle openings for discharging a cleaning or washing liquid to the vehicle window. About a wiper blade side, ie provided on the wiper blade adapter fluid or liquid connection of the at least one distribution or injection channel is connected to at least one outer, usually formed by a hose liquid line through which the cleaning or washing liquid to the distribution or injection channel of a vehicle-side supply unit is supplied controlled.

In particular, it is also known ( DE 10 2007 062 304 A1 ) to provide the at least one fluid port in particular for an improved fluid port on the wiper arm side adapter portion and form at least one fluid path or channel in the wiper blade adapter, which extends partially through the wischarmseitige and partially through the wiper blade side adapter part and includes a flexible or bellows-like hose section as adapter internal fluid connection, the extends between the two adapter parts to allow the pivoting of the two adapter parts relative to each other. The disadvantage here is, inter alia, that the flexible or bellows-like tube section due to the construction of the wiper blade adapter extends perpendicular to the squeegee or the wiper lip and thereby has a very short length. At least at extreme pivoting positions of the adapter parts to each other, the hose section is therefore slightly overstretched and damaged. Furthermore, the hose section is continuously compressed and stretched during normal wiping operation, whereby this section is subject to considerable wear. Furthermore, because of its short length, the hose section has a negative influence on the pivoting of the adapter parts relative to one another and thus on the wiping quality, in particular even if the cleaning and washing fluid freezes in the flexible or bellows-shaped hose section not or is difficult to heat.

Also known are electrically heatable wiper blades ( JP 10329655 . DE 19 89 712 ), which, however, are designed as ironing wiper blades with ironing or ironing structures. In the area of the wiper blade rubber or of the wiper blade body carrying the wiper blade (wiper strip), an electrical heating element formed by a heating wire or a heating foil is provided in each case. The supply of the heating current to the heating element via at least one at least over a partial length along the wiper arm extending electrical line, with which the heatable wiper blade is then connected via an electrical plug / socket connection.

The object of the invention is to show a wiper blade with at least one spray channel, which avoids the disadvantages of known wiper blades and which does not require the flexible or bellows-like section. To solve this problem, a wiper blade according to the patent claim 1 is formed. A wiper blade adapter is the subject of patent claim 11.

Due to the inventive design of the wiper blade adapter and in particular also the wischarmseitigen adapter part, there is the possibility that the adapter internal flexible fluid connection over a relatively large length in wiper blade longitudinal direction between the wischarmseitigen adapter part provided at least one outer fluid port or this outer fluid port having connection area and extends the wiper blade side adapter part. Even with extreme swivel positions of the adapter parts to each other (for example, in a pivoted away from the vehicle window service position), the at least one adapter-internal fluid connection is not overstretched and damaged. The same applies to the pivoting of the wiper blade side adapter part, which is essential during normal wiping operation, relative to the wiper arm side adapter part.

Furthermore, the design according to the invention also makes it possible to carry out the heat exchange of the adapter-internal fluid connection so as to effectively prevent freezing of the cleaning and washing fluid in this connection.

The electrical connection between the external electrical connection on wischarmseitigen adapter part or at the local connection area and provided in and / or on the wiper blade electrical heating element can be performed by the inventive design of the wiper blade adapter with great length and thus very flexible and not wiping quality of the wiper blade become.

Further developments, advantages and applications of the invention will become apparent from the following description of exemplary embodiments and from the figures. In this case, all described and / or illustrated features alone or in any combination are fundamentally the subject of the invention, regardless of their summary in the claims or their dependency. Also, the content of the claims is made an integral part of the description.

The invention will be explained in more detail below with reference to the figures of exemplary embodiments. Show it:

1 in a simplified, perspective view of a wiper lever or arm with a voltage applied to a vehicle window flat wiper blade;

2 the wiper blade together with one end of the wiper arm before connecting the wiper blade to the wiper arm;

3 the wiper blade adapter in perspective view;

4 the wiper arm-side adapter part of a wiper blade adapter of the wiper blade of 1 - 3 in a bottom view;

5 in a perspective exploded view of the elements of the wiper blade, the wiper blade adapter, together with the receptacle for the wiper blade adapter forming the end of the wiper arm;

6 in a simplified representation, a plan view of the rear end of the wiper arm side adapter part;

7 in a simplified perspective view of a wiper blade together with a partial view of the wiper arm in a further embodiment of the invention;

8th the wiper arm and the wiper blade of the 7 , with wiper blade separate from the wiper arm.

In the 1 - 6 are 1 the wiper arm of a windshield wiper system for vehicle windows 2 , preferably for vehicle windshields, and 3 a replaceable on the wiper arm 1 attached flat wiper blade.

The wiper arm 1 includes in a known manner, inter alia, a bearing piece 4 , which serves for attachment to the wiper shaft, not shown, the windshield wiper system, as well as a wiper arm or a wiper rod 5 that have a wiper arm joint 6 with the bearing piece 4 is connected and to the bearing piece 4 lying away a recording 7 forms, in by inserting and locking the wiper blade 3 with a wiper blade adapter 8th is releasably secured again.

How the particular 5 can be seen, the wiper blade, inter alia, in the usual way from a squeegee made as a profile of rubber-elastic material 9 that's against the vehicle window 2 fitting wiper lip 10 forms, made of a spring steel or other suitable elastic material flat spring rail 11 , made of a plastic wiper strip 12 , in the mounted wiper blade 3 the spring rail is received and at the squeegee 9 is held in a form-fitting manner, from a designed as a heating foil heating element 13 , from the middle or about in the middle of the wiper blade 3 on this attached wiper blade adapter 8th , of two, each starting from the wiper blade adapter 8th at a wiper blade end extending spoiler profiles 14 and 15 holding the wiper strip 12 are positively held across this and that between the wiper strip 12 and the spoiler profiles 14 and 15 arranged and below the wiper blade adapter 8th extending heating element 8th Cover on the wiper blade top and made of, for example, as a molded plastic parts tails 3.1 at the two wiper blade ends, the (end pieces) and the aforementioned elements of the wiper blade 3 hold together at the two wiper blade ends. The squeegee 9 , the spring rail 10 , the wiper strip 12 and the heating element 13 each extend over the entire length of the wiper blade.

In the spoiler profiles 14 and 15 are a plurality of injection or nozzle openings having injection channels formed, of which in the 5 one is indicated at 16 and which in each case on both wiper blade long sides, starting from the wiper blade adapter 8th extend to a wiper blade end and for applying a cleaning and washing liquid to the vehicle window 2 serve during the wiping operation.

A special feature of the wiper blade 3 consists in the design of the wiper blade adapter 8th which is not only for the mechanical, re-releasable connection of the wiper blade 3 with the wiper arm 1 serves, but at the same time for the connection of two in the wiper blade adapter 8th trained and each with the spray channels 16 on a wiper blade longitudinal side connected fluid paths, each with a separate outer, with a partial length in the wiper arm 1 guided hose line 17 for supplying the cleaning and washing liquid (eg water with cleaning and / or antifreeze additives) as well as for an electrical connection of the heating element 13 with a vehicle-side electrical supply.

In detail is the wiper blade adapter 8th formed in two parts, consisting of a wiper blade side adapter part 18 and from a wischarmseitigen adapter part 19 , Both adapter parts 18 and 19 are via an adapter joint, which, for example, from a bearing bores, not shown 20 and 21 formed in the adapter parts through bolt, pivotally connected to each other, namely about a pivot axis GA perpendicular or substantially perpendicular to the longitudinal extent of the wiper blade 3 so that's on the wiper arm 1 mounted wiper blade 3 can pivot about this pivot axis GA during wiping operation.

In the adapter part 18 , which with mounted wiper blade 3 the heating element 13 and especially the wiper strip 12 equestrian over this wiper strip 12 is held positively, two separate fluid channels are formed, each extending on a wiper blade longitudinal side and at the two end faces in connecting pieces 22 to connect the respective fluid channel with the two in the spoiler profiles 14 and 15 trained spray channels 16 at the respective wiper blade long side.

At one end of the adapter part 18 are two connecting pieces 23 provided, of which the one connecting piece 23 over the one in the adapter part 18 trained channel with the connecting piece 22 is connected to a wiper blade longitudinal side and the other connecting piece 23 over the other, in the adapter part 18 trained fluid channel with the connecting piece 23 on the other wiper blade long side.

The adapter part 19 is executed in the illustrated embodiment as a cranked or doubly angled U-profile, with two legs 24 and an upper yoke portion connecting these legs 25 , which is the wiper lip 10 facing away from the top of the adapter part 19 forms. The bent part shows the adapter part 19 three adjoining and each U-shaped profile sections, namely the section 19.1 on which also the bearing openings 21 and thus the articulated connection are provided, then the oblique to the section 19.1 extending section 19.2 and then the section 19.3 , with its longitudinal extent parallel to the longitudinal extent of the section 19.1 oriented towards the section 19.1 but is offset laterally. With the section 19.1 overlaps the adapter part 19 the adapter part 18 in the region of a web-like section and is the adapter joint with the adapter part 18 connected.

As the figures show, is the adapter part 19 especially with the sections 19.2 and 19.3 in Wischblattlängsrichtung over the adapter part 18 or over the connecting piece 23 having front side of the adapter part 18 path. In the area of the section 19.1 is the adapter part 19 at the top with a springy tongue 26 with rest 27 formed when inserting the wiper blade adapter 8th or the adapter part 19 in the recording 7 in one in the region of this receptacle at the top of the wiper arm 1 from an opening 28 formed counter latch engages and thus the form-fitting in the recording 7 inserted wiper blade adapter 8th on the wiper arm 1 locked latching. The adapter part 19 is made of plastic or metal, for example.

At the the section 19.2 far away end is the section 19.3 with an electrical and hydraulic connection element 29 provided, which in the illustrated embodiment of a one-piece with the adapter part 19 manufactured base 30 is formed at the the section 19.2 facing away, the free end of the section 19.3 forming frontal side 31 two sleeve-like outer fluid connections 32 and a multi-plug type external electrical terminal 33 forms, as in the 6 is shown schematically. The two fluid connections 32 each have a flexible fluid connection 34 , which is formed by a flexible piece of hose, with a connecting piece 23 connected. Any fluid connection 34 extends in wiper blade longitudinal direction over a large length and covered outside within the U-profile of the adapter part 19 , this length being many times is greater than the height of the wiper blade adapter 8th that is, as the distance between the yoke portion 25 formed top and the wiper strip 12 connected underside of the wiper blade adapter 8th at parallel or substantially parallel to the wiper blade 3 oriented adapter part 19 , This is achieved in that the distance of the connection element 29 from the level of the connecting pieces 23 having end face is substantially larger than this height of the wiper blade adapter 8th , but in particular also in that the adapter part 19 is cranked in the manner described above, resulting in an additional length for the fluid connections 34 results. The electrical connection 33 is via a multi-core electrical connection 35 with the heating element 13 connected. Furthermore, the electrical connection 33 also with additional electrical heating elements in the form of heating wires 36 connected in each fluid connection 34 for the heating of which form a heating circuit through which can flow. The length of the fluid connections 34 and the electrical connections 35 For example, is at least equal to two or three times the aforementioned height.

In the recording 7 is one with the connection element 29 cooperating connection element 37 provided, which from the in the illustrated embodiment cuboid base 38 that exists in the recording 7 of the wiper arm is mounted and on one side two connection or connection piece 39 and on the other opposite side two connecting pieces 40 having, each connecting piece 39 with a preferably coaxially arranged connection piece 40 communicate with and at the wiper arm 1 mounted wiper blade 3 into a connection 32 for producing the respective fluid connection between the connection elements 29 and 37 is introduced. With the connecting pieces 40 is the connection element 37 each with an outer, at least on a partial length in the wiper arm 1 extending hose line 17 connected to supply the cleaning and washing liquid. Also in these outer hose lines 17 are again electrical heating elements in the form of heating wires 41 provided, up to the opening of the connecting piece 39 pass. Below the two connecting pieces is on the relevant side of the base 38 a trained as a multiple socket electrical connection 42 provided, for the interaction with the electrical connection 33 , The connection 42 is with the electrical wires 43 connected, at least with a partial length in the wiper arm 1 run so that after mounting the wiper blade 3 on the wiper arm 1 over the electrical connections 33 and 42 also the electrical connection to the heating element 13 as well as the heating elements 36 is made.

Due to the large distance between the connection element 29 and the connections of the heating element 13 extending below the adapter part 18 are also results for the electrical connections 35 a relatively large, in the U-profile of the adapter part 19 recorded length, which in turn allows unimpeded pivoting of the adapter part 19 relative to the adapter part 18 is possible.

The 7 and 8th show as a further embodiment of a wiper blade 3a together with a wiper arm 1a , This version differs from the wiper arm 1 and the wiper blade 3 essentially only in that the wischarmseitige adapter part 19a of the wiper blade adapter 8a is designed as a non-cranked U-profile, but again far above the one perpendicular or transverse to the wiper blade longitudinal direction oriented end face of the wiper blade side adapter part 18 stands away, and with a length which is many times greater than the height of the wiper blade adapter 18a , so that also in this embodiment, a large length for the provided in the wiper blade adapter or between the two adapter parts 18 and 19a extending flexible fluid connections 34 and electrical connections 35 results.

The invention has been described above by means of exemplary embodiments. It is understood that numerous changes and modifications are possible without thereby departing from the inventive concept underlying the invention.

LIST OF REFERENCE NUMBERS

1,

1a wiper arm

2

vehicle window

3

wiper blade

3.1

terminating piece

4

bearing element

5

wiper arm

6

Wischarmgelenk

7

admission

8, 8a

Wiper blade adapter

9

squeegee

10

wiper lip

11

spring rail

12

wiper strip

13

Heating element or heating foil

14, 15

Spoiler profile

16

injection channel

17

hose

18, 19, 19a

adapter part

19.1, 19.2, 19.3

section

20, 21

bearing opening

22, 23

spigot

24

leg

25

yoke

26

spring tongue

27

rest

28

Opening or counter-latching

29

connecting element

30

Base

31

front

32

liquid port

33

electrical connection

34

Fluid connection or hose piece

35

electrical connection

36

heating wire

37

Wischarmseitiges connection element

38

Base

39, 40

spigot

41

heating wire

42

electrical connection

43

electric lines

GA

Joint or pivot axis of the adapter joint

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102004056835 A1 [0002]
• DE 10000372 A1 [0002]
• DE 102007062304 A1 [0003]
• JP 10329655 [0004]
• DE 1989712 [0004]

Claims (11)

Wiper blade, in particular flat wiper blade, for windshield wiper systems with at least one in and / or on the wiper blade ( 3 ) formed spray channel ( 16 ) for applying a cleaning and washing liquid to a vehicle window ( 2 ), with a wiper blade adapter ( 8th . 8a ) for releasably securing the wiper blade ( 3 ) on a wiper arm ( 1 . 1a ) of the windscreen wiper system, wherein the wiper blade adapter ( 8th . 8a ) at least two parts consisting of a wiper blade ( 3 ) attached wiper blade-side adapter part ( 18 ) and from a wischarmseitigen adapter part ( 19 . 19a ) for attachment to the wiper arm ( 1 . 1a ), wherein the at least two adapter parts ( 18 . 19 ) hinged for pivoting the wiper blade side adapter part ( 18 ) relative to the wiper arm side adapter part ( 19 . 19a ) are connected to each other about a hinge axis (GA), and wherein in the wiper blade adapter ( 8th . 8a ) at least one fluid path is formed, the at least one outer fluid port ( 32 ) and / or at least one external electrical connection ( 33 ) on the wiper arm side adapter part ( 19 . 19a ) with the at least one injection channel ( 16 ) and at least one flexible adapter-internal fluid connection ( 34 ) and / or at least one adapter-internal electrical connection ( 35 ) between the adapter parts ( 18 . 19 ), characterized in that the wiper arm-side adapter part ( 19 . 19a ) in Wischblattlängsrichtung with a partial length ( 19.2 . 19.3 ) via the wiper blade-side adapter part ( 18 ) stands out that at the partial length ( 19.2 . 19.3 ), preferably in the region of the end of this partial length ( 19.2 . 19.3 ) the at least one outer fluid port ( 32 ) and / or the at least one external electrical connection ( 33 ) and that the at least one flexible fluid connection ( 34 ) and / or the at least one flexible electrical connection ( 35 ) in Wischblattlängsrichtung of the connection area ( 29 ) to the wiper blade-side adapter part ( 18 ). Wiper blade according to claim 1, characterized in that the length of the at least one adapter-internal flexible fluid connection ( 34 ) and / or the at least one adapter-internal electrical connection ( 35 ) is many times greater than the height that the wiper blade adapter ( 8th . 8a ) in parallel or approximately parallel to the wiper blade ( 3 ) oriented wischarmseitigen adapter part ( 19 . 19a ) having. Wiper blade according to claim 1 or 2, characterized in that the at least one adapter-internal fluid connection ( 34 ) is formed by a piece of flexible material hose. Wiper blade according to one of the preceding claims, characterized in that the wiper blade-side adapter part ( 19 . 19a ) is formed at least in a partial region, preferably in the region of the adapter-internal fluid connection and / or the adapter-internal electrical connection as a wiper blade towards open U-profile for receiving the adapter-internal connections. Wiper blade according to one of the preceding claims, characterized in that the wiper arm-side adapter part ( 19 . 19a ) the wiper blade side adapter part ( 18 ) overlaps at least in the region of the joint connection. Wiper blade according to one of the preceding claims, characterized in that the wiper arm-side adapter part ( 19 . 19a ) is cranked or rectilinear. Wiper blade according to one of the preceding claims, characterized in that at the connection area ( 29 ) two outer fluid connections ( 32 ) and / or at least one electrical multiple connection ( 33 ) are provided, and that the wiper blade adapter ( 8th . 8a ) two in-line flexible fluid connection ( 34 ), of which via the wiper blade-side adapter part ( 18 ) or there formed liquid channels preferably a liquid compound ( 34 ) with at least one injection channel ( 16 ) on one side of the wiper blade and the other adapter-internal fluid connection ( 34 ) with at least one injection channel ( 16 ) are connected to the other side of the wiper blade. Wiper blade according to one of the preceding claims, characterized in that the at least one external electrical connection ( 33 ) via the adapter-internal electrical connection ( 35 ) to a in and / or on the wiper blade ( 3 ) provided electric heating element ( 13 ) connected. Wiper blade according to one of the preceding claims, characterized in that the at least one external electrical connection ( 33 ) with a in the at least one internal adapter fluid connection ( 34 ) extending electrical heating element ( 36 ) connected is. Wiper blade according to one of the preceding claims, characterized in that the at least one outer fluid connection ( 32 ) and / or the at least one external electrical connection ( 33 ) for connection to or connection to a wiper arm-side connecting element ( 37 ), which on the wiper arm ( 1 . 1a ) or in a recording ( 7 ) arranged on the wiper arm ( 1 . 1a ) for releasably securing the wiper blade adapter ( 8th . 8a ) is provided. Wiper blade adapter for releasably securing a wiper blade ( 3 ) on a wiper arm ( 1 . 1a ), characterized in that the adapter is designed according to one of the preceding claims 1-10.

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