DE10000372B4 - Wiper strip for a wiper blade and wiper blade - Google Patents

Abstract

Wiper strip (2, 2a, 2b) for a wiper blade (1) for cleaning windows on vehicles, having an elongate wiper strip body (8) made of a rubber-elastic material and having at least one molded-on side (12) over the side (12). 12) wegstehende and in the longitudinal direction of the wiper strip (2, 2a, 2b) extending wiper web (13), with means for securing the wiper strip (2, 2a, 2b) on a spring rail (3) of the wiper blade (1), as well as with at least one extending in the longitudinal direction of the wiper strip (2, 2a, 2b) in the wiper strip body (8) channel (16, 18, 21) for a washing liquid, which has at least one channel (16, 18, 21) and at least one of at least a spray opening formed in the wiper strip body (8) and opening into the channel (16, 18, 21) for the washing liquid and open on an outer surface of the wiper strip body (8), spray opening (17, 19, 20, 22) formed on the pane to be cleaned can be eight, wherein the wiper strip body (8) has a cross-sectional profile with at least three adjoining sides (9, 10, 11, 12), of which one side (12) forms the underside of the wiper strip body (8) and the at least one injection channel ( 17, 19, 20, 22) is open on a side (9, 11) adjoining the side (12), characterized in that the means for fastening the wiper strip (2, 2a, 2b) to the spring rail (3) in a first distance from the side (12) of the wiper strip body (8) or its plane are provided, that of the at least one spray channel (17, 19, 20, 22) formed at least one injection opening at a second, greater distance from the side ( 12) is provided, that the wiper strip body (8) is spoiler-shaped and has an outer cross section with a side (11) which at least in a partial area an angle smaller than 90 ° with the side (12) or the plane includes that the side (12) the Wis chleiste (2, 2a, 2b) or whose plane with the median plane of the at least one wiper web (13) forms an angle of 90 ° or nearly 90 °, that an axis (17 ', 19', 20 ', 22') of at least an injection opening or the at least one spray channel (17, 19, 20, 22) with the side (12) of the wiper strip (2, 2a, 2b) or its plane an angle (α, β) smaller than 90 °, but greater than 20 °, and that the at least one channel (16, 18, 21) is arranged in the spoiler-like shaped region of the wiper strip body (8).

Description

The invention relates to a wiper strip according to the preamble of claim 1. Furthermore, the invention relates to a wiper blade using a wiper strip according to the invention.

A wiper strip according to the preamble of claim 1 is known from DE 196 12 133 A1 known. It comprises a longitudinally extending channel for supplying washing liquid to the underside and on the two longitudinal sides arranged spray openings. One of the stiffening of the wiper strip serving spring rail is received above the channel for the washing liquid in a rectangular cross-section recess of the wiper strip. In addition, the wiper strip known from the cited document comprises on its underside two mutually parallel wiper lips for cleaning the vehicle window. The known wiper strip is constructively designed relatively expensive and requires a relatively large cross-sectional area. In addition, their contact pressure on the vehicle window to be cleaned tends to decrease at higher speed due to the cross-sectional shape. The object of the invention is to develop a wiper strip according to the preamble of claim 1 such that it allows an advantageous arrangement of the injection ports and the stiffening of the wiper strip serving spring rails in cross-sectional shape, at the same time the functionality of the wiper strip are maintained even at higher vehicle speeds should. This object is achieved in a wiper strip for a wiper blade and a wiper blade with a wiper strip for cleaning windows on vehicles with the features of claim 1.

Advantageous developments of the wiper strip according to the invention are listed in the subclaims.

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

1 in a simplified representation and in side view of a wiper blade for cleaning windows in vehicles;

2 in a simplified representation of a section through the squeegee or the wiper strip of the wiper blade of 1 ;

3 and 4 Representations similar 2 in further possible embodiments of the wiper strip;

5 in a simplified representation and on average a final piece of the wiper blade of the 1 , together with a partial representation of the wiper strip;

6 a view of the final piece in a in the 5 with "X" viewing direction;

7 in a sectional view of the other fitting of the wiper blade of the 1 , together with a partial representation of the wiper strip;

8th a plan view of one end of the wiper strip, together with over this end projecting spring rails of the support element.

This in the figures generally with 1 designated wiper blade consists inter alia of an elongated, made of a rubber-elastic material by extrusion wiper strip 2 and a multi-part, elongated support member. The multi-part, spring-elastic support member comprises two made of spring steel, band-shaped spring rails 3 between which the wiper strip 2 is held and where about in the middle of the wiper blade 1 an adapter 4 is provided, over which the wiper blade 1 can be connected in a known manner with the wiper arm, not shown, a windshield wiper. Part of the support element are still two end pieces 5 and 6 at each end of the wiper blade 1 are provided. In these final pieces 5 and 6 extends the wiper strip 2 with one end in each. In these end pieces 5 and 6 are also the two spring rails 3 with her over the wiper strip 2 protruding ends 3 ' held by snapping, as will be explained in more detail below.

The 2 shows an enlarged view of a cross section through the wiper strip 2 , As stated above, this strip is made as a profile of a rubber-elastic material, preferably of rubber using a suitable molding process, preferably by extrusion. The wiper strip 2 is shaped as a so-called "spoiler wiper strip", ie it has a wiper strip body 8th with one in the 2 upper profile portion having a substantially trapezoidal cross-section, with the two parallel or substantially parallel sides 9 and 10 with the side sloping towards it 11 and with the perpendicular to the sides 9 and 10 running side 12 , with the wiper blade mounted 1 the vehicle window to be cleaned is adjacent and the underside of the wiper strip 2 forms. On the side 12 is over a Kippsteg 13 ' reduced thickness of the voltage applied to the vehicle window and over the entire length of the wiper strip 2 extending Wischsteg 13 formed. Furthermore, the wiper strip body 8th near the page 12 with two to the sides 9 respectively. 10 towards open, over the entire length of the wiper strip 2 extending and also at the ends of this wiper strip 2 open grooves 14 respectively. 15 provided, and in each case for receiving a spring rail 3 , The page 11 forms the spoiler surface, which makes an angle smaller than 90 ° with the side 12 includes, which is aside 9 opens.

In the wiper strip 2 continues to be a full length of this wiper strip 2 extending and open at both ends 16 for a washing liquid, ie for water or for a mixture of water and other additives provided. The channel 16 is arranged in the illustrated embodiment, that the largest possible distance between the longitudinal axis of the channel 16 and the bottom of the wiper strip 2 forming side 12 exists, but at the same time around the channel 16 There is still enough material around, so the wiper strip 2 also in the area of the canal 16 has the necessary strength. In the illustrated embodiment, the distance of the channel 16 from the bottom of the wiper strip 2 larger than from the top edge of the squeegee, from the interface of the sides 9 and 11 is formed.

On the side 9 is the wiper strip 2 with a slightly concave section 9 ' provided, extending over the entire length of the wiper strip 2 extends. With 17 is an injection channel called, with its one, open end on the side 9 in the area of the concave section 9 ' ends and there forms an injection port, namely at the in the 2 lower, the groove 14 nearer edge of the section 9 ' , With its other end, the injection channel opens 17 in the channel 16 , Along the wiper strip 2 are at predetermined intervals several such spray channels 17 intended. In the illustrated embodiment, the injection channels are 17 with a straight wiper strip 2 parallel to each other and close with the plane of the page 12 the wiper strip 2 an angle α, which in the illustrated embodiment is on the order of 45 °.

The angle α is generally chosen so that from the respective injection channel 17 Exiting washing liquid to the respective disc effectively hits, ie the washing liquid is not sprayed across the disc away, the point of impact of the washing liquid jet but sufficiently far from the wiper 13 is removed, so that the washing liquid has enough time to spread on the disc before moving away from the wiper 13 is stripped off.

The 3 shows as a further possible embodiment a wiper strip 2a extending from the wiper strip 2 essentially only differs in that instead of the channel 16 a channel 18 is provided, which has a substantially larger cross-section and in its cross-sectional shape of the outer cross-sectional contour of the wiper strip body 8th follows. In the channel 18 open several injection channels 19 and 20 of which the spray channels 19 turn to the side 9 are open and with the page 12 include the angle α. The spray channels 20 are at the side 11 open and close with the plane of the page 12 an angle β, which, however, is smaller than the angle α.

The 4 shows as a further possible embodiment a wiper strip 2 B extending from the wiper strip 2 this differs in that in addition to the channel 16 yet another channel 21 is provided for, at the time of the 4 selected representation above the channel 16 ie at an even greater distance from the plane of the page 12 , While the channel 16 again the injection channels 17 has, open into the channel 21 ejaculatory ducts 22 standing by the side 11 are open and their axes 22 ' with the level of the page 12 include the smaller angle β.

All above wiper strips 2 - 2 B have the advantage that through the training and arrangement of the channels 16 . 18 and 21 as well as through the design and arrangement of the spray channels 17 . 19 . 20 and 22 an optimum spray angle is achieved, in particular also in such a way that the washing liquid actually impinges on the vehicle window and is not injected over it. The wiper strips 2a and 2 B have the further special advantage that by the on the sides 9 and 11 open spray channels 17 . 19 . 20 and 22 Washing liquid in each direction of movement of the wiper blade 1 in front of the lagging wiping ridge 13 can be sprayed onto the vehicle window. The wiper strip 2a with the channel 18 With a large cross-section, in addition to the advantage that a plurality of spray openings can be sufficiently supplied with washing liquid, also the advantage of a material savings in the production of the wiper strip formed as a spoiler 2a and the advantage that during the manufacture of the wiper strip 2a or the wiper strip profile used tool can be realized with very high strength.

As the 2 - 4 Show is on all wiper rails 2 - 2 B the Wischsteg 13 each over the Kippsteg 13 ' at one side 12 provided and extending over the entire length of the wiper strip 2 . 2a . 2 B extending projection 12 ' formed.

The final pieces 5 and 6 are in detail in the 5 - 7 played. They are each cap-like made of a suitable material, for example made of plastic, preferably each as a one-piece moldings, and have an opening into which the respective end of the wiper strip, in the 5 - 8th again with 2 is designated, fitting is insertable. For example, this is the final piece 5 an interior 23 , at least in the area of in the 5 right end of the final piece 5 the External cross section of the wiper strip 2 adapted and to this end as well as partly to the bottom 24 of the final piece 5 so open is that the final piece 5 positive fit on one end of the wiper strip 2 can be put on, in such a way that the projection 12 ' on the bottom 24 is visible and with its the Wischsteg 13 facing side approximately level with the bottom 24 lies and the Wischsteg 13 over the bottom 24 of the final piece 5 protrudes. One in the interior 24 molded pin or plug 25 is enough with attached end piece 5 in the channel 16 into and close one end of this channel 16 ,

In the interior 23 are still two recesses 26 educated. In every recess 26 extends a catch 27 into it, the one at the recess 26 delimiting, parallel to the bottom 24 extending wall section 28 is provided. In the recesses 26 be when putting on the end piece 5 the over the relevant end of the wiper strip 2 protruding ends 3 ' the two spring rails 3 introduced, then with one at each end 3 ' provided opening 29 on a catch 27 snap into place so over the end piece 5 at the relevant end of the wiper blade 1 the wiper strip 2 and the two spring rails 3 connected together and at the same time the channel 16 locked there.

At the open side of the end piece 5 are at the bottom still two in the middle of the final piece 5 wegstehende, spaced apart and parallel reinforcing webs 30 molded, with the attached end piece 5 the Kippsteg 13 ' at the relevant end of the wiper strip 2 overlap on both sides. As a result, at this end of the wiper strip 2 the Kippsteg 13 ' additionally supported laterally and relieved of tension, resulting in a significant improvement in the life of the wiper blade 1 results.

On the bottom 24 is the final piece 5 formed in the illustrated embodiment substantially planar, while the end piece 5 otherwise, in particular domed on the top is like a hood.

The final piece 6 is different from the final piece 5 essentially only in that instead of the plug 25 a connecting piece 31 is provided, which is also about the opening of the interior 23 opposite outside of the fitting 6 protrudes and a continuous channel 32 which forms at the end of the wiper strip 2 attached connector 6 in the channel 16 empties. This is then over the channel 32 or via a to the connection piece 31 connected external line connected to a supply device, from which the washing liquid is supplied with pressure.

The two fittings 5 and 6 So have multiple function, ie they serve to connect the wiper blade 1 to the source for the washing liquid or to close the channel 16 , but they also serve to connect the wiper strip 2 with the spring rails 3 as well as to cover length changes that on the wiper strip 2 due to temperature fluctuations and / or aging can occur.

The described embodiment also has the advantage that the number of items that are required for the wiper blade 1 are needed, is low and results in a particularly cost-effective solution.

It is understood that the plug 25 as well as the connecting piece 31 in cross section in each case to the cross section of the channel 16 . 18 . 21 for the washing liquid in the wiper strip 2 . 2a respectively. 2 B are adapted and / or with multiple channels 16 . 18 . 21 like the wiper strip, for example 2 B the case is several plugs 25 and several connecting pieces 31 are provided.

A special feature of the wiper strip 1 There is also the fact that in this embodiment, the spray openings for the washing liquid exclusively in the respective wiper strip 2 . 2a . 2 B are provided, ie outside of the end pieces 5 and 6 ,

LIST OF REFERENCE NUMBERS

1

wiper blade

2, 2a, 2b

wiper strip

3

spring rail

3 '

The End

4

adapter

5, 6

terminating piece

8th

Wiper strip body

9 '

section

9 to 12

page

12 '

head Start

13

wiping web

13 '

tilting

14, 15

groove

16

channel

17

injection channel

18

channel

19, 20

injection channel

19 ', 20'

Spray channel axis

21

channel

22

injection channel

22 '

axis

23

inner space

24

bottom

25

Plug

26

recess

27

locking lug

28

wall section

29

opening

30

strengthening web

31

spigot

32

channel

Claims (9)

Wiper strip ( 2 . 2a . 2 B ) for a wiper blade ( 1 ) for cleaning windows on vehicles, comprising an elongate wiper strip body made of a rubber-elastic material ( 8th ) on one side ( 12 ) at least one molded, over the side ( 12 ) wegstehende and in the longitudinal direction of the wiper strip ( 2 . 2a . 2 B ) extending wiper bar ( 13 ), with means for attaching the wiper strip ( 2 . 2a . 2 B ) on a spring rail ( 3 ) of the wiper blade ( 1 ), as well as with at least one in the longitudinal direction of the wiper strip ( 2 . 2a . 2 B ) in the wiper strip body ( 8th ) extending channel ( 16 . 18 . 21 ) for a washing liquid, which via this at least one channel ( 16 . 18 . 21 ) and at least one of at least one in the wiper strip body ( 8th ) trained in the channel ( 16 . 18 . 21 ) opening for the washing liquid and on an outer surface of the wiper strip body ( 8th ) open spray channel ( 17 . 19 . 20 . 22 ) formed spray opening can be applied to the disc to be cleaned, wherein the wiper strip body ( 8th ) a cross-sectional profile with at least three adjoining sides ( 9 . 10 . 11 . 12 ), one side of which ( 12 ) the underside of the wiper body ( 8th ) forms and the at least one injection channel ( 17 . 19 . 20 . 22 ) on one side ( 12 ) subsequent page ( 9 . 11 ) is open, characterized in that the means for securing the wiper strip ( 2 . 2a . 2 B ) on the spring rail ( 3 ) at a first distance from the side ( 12 ) of the wiper strip body ( 8th ) or whose plane are provided, that of the at least one injection channel ( 17 . 19 . 20 . 22 ) formed at least one injection opening at a second, greater distance from the side ( 12 ) is provided that the wiper strip body ( 8th ) is spoiler-shaped and has an outer cross-section with one side ( 11 ), which at least in a partial area an angle smaller than 90 ° with the side ( 12 ) or whose level includes the page ( 12 ) of the wiper strip ( 2 . 2a . 2 B ) or its plane with the median plane of the at least one wiper web ( 13 ) includes an angle of 90 ° or nearly 90 °, that an axis ( 17 ' . 19 ' . 20 ' . 22 ' ) of the at least one spray opening or the at least one spray channel ( 17 . 19 . 20 . 22 ) with the page ( 12 ) of the wiper strip ( 2 . 2a . 2 B ) or whose plane includes an angle (α, β) smaller than 90 ° but greater than 20 °, and that the at least one channel ( 16 . 18 . 21 ) in the spoiler-like shaped region of the wiper strip body ( 8th ) is arranged. Wiper strip according to claim 1, characterized in that the wiper strip body ( 8th ) a cross-sectional profile with at least three adjoining sides ( 9 . 10 . 11 . 12 ), which in each case over the entire length of the wiper strip body ( 8th ). Wiper strip according to claim 1 or 2, characterized in that on at least two sides ( 9 . 11 ) of the wiper strip body ( 8th ) at least one of a spray channel ( 17 . 19 . 20 . 22 ) formed injection opening is provided. Wiper strip according to one of claims 1 to 3, characterized in that the means for fastening the wiper strip body ( 8th ) on the spring rail ( 3 ) of at least one projection and / or at least one recess or groove ( 14 . 15 ) on two opposite sides ( 9 . 10 ) of the wiper strip body ( 8th ) are formed. Wiper strip according to claim 1 to 4, characterized in that in the wiper strip body ( 8th ) at least two, in the longitudinal direction of the Wischleistenkörpers ( 8th ) extending channels ( 16 . 21 ) are provided for the washing liquid. Wiper strip according to one of the preceding claims 1 to 3, characterized in that when forming the channel ( 18 ) for the washing liquid with a large cross-section, the cross-sectional shape of this channel ( 17 ) the outer cross section of the wiper strip body ( 8th ) is executed following. Wiper strip according to claim 1, characterized in that the at least one channel ( 16 . 21 ) for the washing liquid in one of the side ( 12 ) lying away angular range of the cross section of the wiper strip body ( 8th ), wherein the angular range between the one side ( 11 ) and another page ( 9 ) formed on one side ( 11 ) on one side ( 12 ) removed upper side of the wiper strip ( 2 . 2a ). Wiper strip ( 2 . 2a . 2 B ) according to one of claims 1 to 7, characterized by its production as an extruded profile. Wiper blade ( 1 ) with a wiper strip ( 2 . 2a . 2 B ) according to one of claims 1 to 8.

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