DE10025630A1 - Wiper strip for windscreen wiper contains hollow chamber, radially limited by back strip, ribs and wiper lip and containing grooves, in which spring rail is arranged - Google Patents

Abstract

Wiper strip (1) for a windscreen wiper contains a hollow chamber (21), radially limited by a back strip (3), ribs (7) and a wiper lip (5). In the hollow chamber are grooves (13), in which a spring rail (15) is arranged. The wiper lip has a wiper edge (9), and with its side (11) turned away from the wiper edge supports against the spring rail in the grooves. The back strip, at least on one side, has a rib (19). The ribs in side view of the wiper strip extend virtually to the wiperedge of the wiper lip. The wiper lip is connected to the back rail by two flexible ribs (7).

Description

The invention relates to a wiper strip for one Windscreen wipers with a back bar, with a tiltable one the wiper lip attached, the Wiper lip has a wiping edge and with an in Cavity extending in the longitudinal direction of the wiper strip.

This is known from DE-GM 94 00 705.5 wiper strip complex structure and therefore expensive to manufacture. In addition, this wiper strip builds very high, which is a high Air resistance and loud wind noise caused. The task on which this utility model is based, a Provide wiper strip through which Windshield washer fluid is sprayed onto the windshield, so that minimal visual impairment and optimal Cleaning effect will only be achieved partially reached. The reasons for this are that only in one Wiping direction of windshield washer fluid on the windshield can be sprayed. Another disadvantage is that the openings required for this cannot be closed, so that  a lagging of windshield washer fluid after Switching off the feed pump occurs. After all, that is Wiper strip due to its delicate structure, in particular in the area of the wiper lip, a quick wear subject.

The invention has for its object a wiper strip to improve in terms of function and service life. At the same time, the manufacturing costs are to be reduced.

This object is achieved by a Wiper strip for a wiper with one Back bar, with a tiltable on the back bar attached wiper lip, the wiper lip being a wiping edge has and with one in the longitudinal direction of the wiper strip extending cavity, the wiper lip over two flexible webs is connected to the back rail, wherein the cavity from the back strip of the wiper lip and the Webs is limited in the circumferential direction, in which Cavity grooves are provided for receiving a spring rail are and where the wiper lip with its, the wiping edge opposite side against a located in the grooves Spring rail supports.  

This wiper strip builds very low, which is the origin annoying wind noise prevented, and is through Extrusion is easy to manufacture because the wiper strip in the Cross section has only one cavity. Through the Use only one spring rail instead of two separate spring rails, the strength, in particular the torsional rigidity, the wiper strip increased significantly. Due to the available space, the Wiper strip also run very wide, which means strength and torsional rigidity increase further.

The above-mentioned object is also invented solved with a wiper strip for a wiper a back bar, with a tiltable on the back bar attached wiper lip, the wiper lip being a wiping edge has and with one in the longitudinal direction of the wiper strip extending cavity, wherein in the cavity grooves for Recording a spring rail are provided, the Back bar has a rib on at least one side, and wherein the ribs in the side view of the Wiper strip up to almost the wiping edge of the wiper lip extend so that the ribs are the sensitive wiper lip  from mechanical damage, for example through Protect snow, ice or the like and thus the life of the Raise the wiper strip. Freezing the wiper lip on the to wiping window can not be completely prevented; however, the thickness of the slush or ice layer is limited and thus also the Lift the wiper strip off the window onto the frozen wiper lip forces reduced.

In a variant of the invention it is provided that the Wiper lip over two flexible webs with the back rail is connected that the cavity from the back bar of the Wiper lip and the webs is limited in the circumferential direction, that in the cavity grooves for receiving a spring rail are provided and that the wiper lip with its, the Side facing away from the wiping edge against a side in the grooves rests spring rail so that the top mentioned advantages of the first solution according to the invention come to fruition in this embodiment.

The task mentioned at the outset is also achieved by a Wiper strip for a wiper with one Back bar, with a tiltable on the back bar  attached wiper lip, the wiper lip being a wiping edge has, and with one in the longitudinal direction of the wiper strip extending cavity, the wiper lip over two flexible bars at least indirectly with the back rail is connected, the cavity from the back bar of Wiper lip and the webs is limited in the circumferential direction, being in the back bar and / or the webs in Longitudinal direction of the wiper strip several on the one to be wiped Disc directed openings are present and that the Openings open into the cavity. At this solution according to the invention, the cavity is also for supply of windshield washer fluid and it can be used to both Sides of the wiper strip windscreen washer fluid or Liquid vapor sprayed onto the window to be wiped become. The washer can pass through two rows of openings can be cleaned in two stages and therefore thoroughly without dirt accumulates on the wiper lip edge. The upper Row causes the dirt to soak while the lower row causes rinsing.

In a variant of the invention it is provided that in the Cavity grooves available to accommodate a spring rail and that the wiper lip with its, the wiping edge  opposite side against a located in the grooves Spring rail supports, so that the webs are relieved and a precise tilting of the wiper lip is achieved.

In further refinements of the invention, that the cavity at the ends through a closure piece is closed and / or that the closure piece one Connection piece for a hose or a line and / or that the closure piece is form-fitting, in particular by one with at least one recess Spring rail interacting wedge with the spring rail is connected so that the windshield washer fluid only on the openings provided for this purpose can emerge Easy supply of the windscreen washer fluid and a secure connection of the wiper strip, Locking piece and spring rail is guaranteed.

In a further embodiment of the invention, in tilted state of the wiper strip in the wiping direction openings in the web behind the wiper lip squeezed together so that these openings are closed become. This will obscure the view  Cleaning the window and the consumption of Windshield washer fluid reduced.

Another variant of the invention provides that the wiper lip two protruding into the cavity Has stop bars, and that in the tilted state Wiping one of the stop bars the openings in the Back bar or rib on one side of the wiper bar closes, so that these openings on the in Wiping direction after the wiping lip openings to be closed and obstructions and consumption of Windshield washer fluid can be further minimized.

In a further addition to the invention, the spring rail a guide groove on its side facing the wiper lip so that the wiper lip is centered in the guide groove becomes and thus the tilting movement more accurate and reliable takes place.

In a further embodiment of the invention Opening angle of the groove is greater than 90E, so that the Wiper lip is always guided in the groove and on the other hand  the wiping lip does not tilt through the groove is hindered.

In another embodiment of the invention, the Wiper strip has a symmetrical outer contour and / or symmetrical cross sectional profile of the inner areas of Back bar, wiper lip and webs on, so that Operating behavior of the wiper strip in both wiping directions is the same and simplifies the manufacture of the wiper strip becomes.

In another addition to the invention, the webs are as Film hinge designed so that it can tilt the Wiper lip has very little resistance oppose, have a long life and yet the wiper lip is well guided. With increasing tilt angle the wiper lip, relative to the back bar, takes the Resistance of the webs to the deformation, so that a softly apply the wiper lip to the back bar at the end the tilting movement is guaranteed.

In a further addition to the invention, the wiper strip and the female connector at its ends positively, in particular  by one with at least one recess in the spring rail interacting wedge, joined together so that a Secure connection of spring rail and wiper strip achieved becomes.

In another embodiment of the invention, the Spring rail and / or the groove a friction-reducing Coating, in particular made of Teflon or the like Material on so that there is no tension between Spring rail and wiper strip comes, which is an even Pressing the wiper lip on the window to be wiped, especially if these have changing radii of curvature has prevent.

In a further addition to the invention is a form-fitting wiper strip adapter connected to the wiper strip available, so that the wiper strips according to the invention without constructive changes to the motor vehicle on various Motor vehicles can be used.

In another embodiment of the invention Outer contour of the wiper strip designed aerodynamically, so that the wind noise will be further reduced and also  the at high speeds on the wiper strip and the Windshield wiper arm further acting flow forces be reduced. The outer edges of the wiper strip is like this trained to be as close as possible to the Windshield is enough, but without touching it. As a result, the proportion of those acting on the wiper strip laminar flow versus the turbulent flow component enlarges, which reduces noise and better HGV values until the squeegee is lifted off the Windshield allowed.

In another embodiment of the invention provided that the wiper lip or the back bar two have stop webs projecting into the cavity and that the Stop bars in cooperation with the back bar or limit the tilting movement of the wiper lip, so that the end and the beginning of the tilting movement of the wiper lip soft and without annoying noises.

Further advantages and advantageous configurations of the Invention are the following description, the drawing and the patent claims.

An embodiment of the subject of the invention is in shown in the drawing and below described. Show it:

Fig. 1: a first embodiment in cross section;

Fig. 2: a second embodiment in cross section;

Fig. 3: a third embodiment with a particularly flat design;

Fig. 4: a fourth embodiment with cleaning function;

Fig. 5: the operation of the cleaning function of the fourth embodiment;

Fig. 6: a closure piece on the end of a wiper strip in longitudinal section;

Fig. 7 is a side view of a wiper strip with a locking piece;

Fig. 8: the end of a female connector; and

Fig. 9 shows a Wischerblattdapter in side view and in plan view.

The following are for the same components in the different figures used the same reference numerals and not explained again. This applies to a figure  Explained for the other figures in which same Reference numerals occur accordingly.

Fig. 1 shows a cross section through a first embodiment of a wiper blade 1 of the invention. The wiper strip 1 has a back strip 3 and a wiper lip 5 . The wiper lip 5 is connected via webs 7 with the back bar. 3 The wiper lip 5 has a wiper edge 9 , which in operation rests on the window to be wiped, which is not shown in FIG. 1. On the side of the wiper lip 5 opposite the wiper edge 9 , a tilting web 11 is arranged, via which the wiper lip 5 is supported against a spring rail 15 guided in grooves 13 . The fulcrum of the tilting movement which the wiper lip 5 executes during operation when the direction of movement changes is the point of contact of the tilting web 11 on the spring rail 15 . The spring rail 15 has a guide groove 16 which has an opening angle of more than 90E, so that on the one hand the tilting web 11 is guided in the guide groove 16 and on the other hand the tilting movement of the wiper lip 5 is not hindered.

The tilting movement of the wiper lip 5 is limited by stop webs 17 which rest on the back bar 3 .

The stop webs 17 ensure that no noise or only a small amount of noise occurs when the wiper lip 5 is struck and lifted off the back strip 3 . The stop webs 17 can also be arranged on the back bar 3 .

At its ends facing the window to be wiped, the back bar 3 has two ribs 19 which are pulled down over the wiper lip 5 . The ribs 19 prevent ice, snow or sleet from reaching the wiper lip 5 and in particular its wiping edge 9 and wearing or even destroying it. The ribs 19 can be pulled down to such an extent that they remove coarse dirt or snow or ice from the window to be wiped without the wiper lip 5 being damaged.

A cavity 21 is formed in the interior of the wiper strip 1 and is delimited in the circumferential direction by the back strip 3 of the wiper lip 5 and the webs 7 . The grooves 13 are formed in the cavity 21 . This embodiment is very flat, has a simple structure and is very robust in accordance with its compact geometry. By using only one spring rail 13 , the torsional rigidity of the wiper strip 1 is further increased and the number of components is reduced, which leads to cost advantages. In addition, the spring rail 13 can be made wider, which causes a further increase in torsional rigidity. In the embodiment shown in FIG. 1, the outer contour of the back bar 3 is symmetrical, so that the operating conditions are the same in both wiping directions and the manufacture of the wiper bar is simplified.

In FIG. 2, a second embodiment is shown of a wiper strip according to the invention. In this embodiment, the outer contour of the back bar 3 is not symmetrical, but has a spoiler 23 , which increases the pressing force of the wiper lip 5 on the window to be wiped, not shown in FIG. 2, at high speeds. In addition, the outer contour of the back bar has a shoulder 25 on each side, into which a wiper blade adapter, also not shown, can be clamped.

In Fig. 3 a further embodiment of a wiper strip 1 according to the invention. In this embodiment, the back bar 3 is particularly flat and aerodynamically designed. To improve the flow behavior of the wiper strip according to the invention, the outer contour of the back strip 3 can also be designed asymmetrically.

In FIG. 4, a fourth embodiment of a wiper strip according to the invention. In this embodiment, the cavity 21 formed by the back bar 3 , wiper lip 5 and webs 7 is filled with windshield washer fluid. Openings 27 and 29 extend from the cavity 21 , through which the windshield washer fluid can be sprayed onto the windshield to be wiped and cleaned (not shown in FIG. 4). The openings 27 and 29 can be made after extrusion. They are generally circular and are dimensioned in such a way that sufficient wiping liquid from the cavity 21 reaches the window to be wiped and cleaned. The arrangement of the openings 29 and 27 in two levels enables particularly intensive cleaning. The openings 27 have the task of soaking the dirt on the windshield to be wiped, while the windshield washer fluid emerging from the openings 29 located in the immediate vicinity of the wiping edge 9 in connection with the wiping lip 5 effects the actual cleaning. The presence of the water in the cavity 21 also has the effect that the tilting movement of the wiper lip 5 is damped when changing from one direction of movement to the other, so that the operation of the windshield wiper becomes even quieter.

FIG. 5 shows the fourth exemplary embodiment according to FIG. 4 in operation. The wiper strip 1 is shown in a movement from right to left over the window 31 to be wiped, so that the wiper lip 5 tilts into the position shown. In this position, the right stop web 17 closes the openings 27 in the back bar 3 or the rib 19 thereof . The openings 29 in the right web 7 are squeezed together by the deformation of the web 7 and thus also sealed. That is, on the side of the wiper strip 1 located behind the wiper edge 9 in the wiping direction, no windshield washer fluid emerges from the cavity 21 , so that the wiped and cleaned windshield 31 remains dry. On the left in Fig. 5 side of the wiper strip 1 enters washer fluid from the cavity 21 through the openings 27 and 29 of wetted at different locations, the disk 31 and so enabling a cleaning and wiping dry the disc 31. The driver always has an optimally cleaned window and also a very good view even during the cleaning and wiping process.

In Fig. 6 the end of a wiper strip 1 according to the invention is shown in longitudinal section. The spring rail 15 protrudes beyond the end of the back bar 3 . The cavity 21 of the wiper strip 1 is closed by a closure piece 33 . In order to achieve a good sealing effect, a seal 35, for example made of foam rubber, is inserted between the back bar 3 and the closure piece 33 . The closure piece 33 is secured by means of a wedge 37 which is inserted into an opening 39 in the closure piece 33 and a recess 41 in the spring rail 15 . The closure piece 33 has a connecting piece 43 , on which a line 45 for windshield washer fluid line is pushed.

In Fig. 7, a closure piece 33 and the wiper strip 1 behind it is shown in side view. From this view, the compact and simple construction of the wiper strip 1 according to the invention and the closure piece 33 results.

In Fig. 8 the end of a spring rail 15 is shown. The spring rail 15 has two cutouts 41 , and the wedge 37 , not shown in FIG. 8, accordingly has two lugs which engage in the cutouts 41 . A compensating bore 47 is provided in the spring rail 15 , which ensures the supply of the parts of the cavity 21 below the spring rail 15 with windshield washer fluid. The connecting piece 43 can of course also be arranged below the spring rail 15 .

FIG. 9 shows a wiper strip adapter 49 in a side view ( FIG. 9a) and in a top view ( FIG. 9b). The wiper strip adapter 49 has a pin 51 and a clamping element 53 . With the pin 51 , the wiper strip adapter 49 is rotatably connected to a wiper arm, not shown, of the motor vehicle.

The clamping element 53 is adapted to the outer contour of the back strip 3 of a wiper strip 1 ( not shown in FIG. 9 ) and has in its opening area on each side at least one nose 55 which is bent into the position shown in broken lines when the wiper strip adapter 49 with a wiper strip 1 to be connected. The exemplary embodiment of a wiper strip adapter 49 shown in FIG. 9 can, for example, be clamped onto a wiper strip with the cross section shown in FIG. 7.

All in the description, the following claims and The features shown in the drawing can be both individually as well as in any combination with each other be essential to the invention.  

Reference list

1

Wiper strip

3rd

Back bar

5

Wiper lip

7

web

9

Wiping edge

11

Tipping bar

13

Groove

15

Spring rail

16

Guide groove

17th

Footbridge

19th

rib

21

cavity

23

spoiler

25th

paragraph

27

opening

29

opening

31

disc

33

Closure piece

35

poetry

37

wedge

39

breakthrough

41

Recess

43

Connecting piece

45

management

47

Compensating hole

49

Wiper strip adapter

51

Cones

53

Clamping element

Claims (19)

1. wiper strip of a windscreen wiper, with a back strip (3), with a tiltable attached to the back strip (3) wiping lip (5), wherein the wiper lip (5) has a wiping edge (9), and one in the longitudinal direction of the wiper strip ( 1) extending cavity (21), characterized in that the wiper lip (5) is connected via two flexible webs (7) to the seat rail (3), that the cavity (21) of the back strip (3) of the wiper lip (5 ) and the webs ( 7 ) is limited in the circumferential direction, that in the cavity ( 21 ) there are grooves ( 13 ) for receiving a spring rail ( 15 ), and that the wiper lip ( 5 ) faces away from the wiper edge ( 9 ) (11) against a spring rail ( 15 ) located in the grooves ( 13 ). 2. wiper strip of a windscreen wiper, with a back strip (3), with a tiltable attached to the back strip (3) wiping lip (5), wherein the wiper lip (5) has a wiping edge (9), and with an in longitudinal direction of the wiper strip ( 1 ) extending cavity ( 21 ), characterized in that there are grooves ( 13 ) in the cavity ( 21 ) for receiving a spring rail ( 15 ), that the back bar ( 3 ) has a rib ( 19 ) on at least one side, and that the ribs ( 19 ) in the side view of the wiper strip ( 1 ) extend almost to the wiping edge ( 9 ) of the wiper lip ( 5 ). 3. wiper strip according to claim 2, characterized in that the wiper lip ( 5 ) via two flexible webs ( 7 ) with the back rail ( 3 ) is connected, that the cavity ( 21 ) from the back strip ( 3 ), the wiper lip ( 5 ) and the webs ( 7 ) are limited in the circumferential direction so that there are grooves ( 13 ) in the cavity ( 21 ) for receiving a spring rail ( 15 ) and that the wiper lip ( 5 ) faces away from the wiper edge ( 9 ) ( 11) against a spring rail ( 15 ) located in the grooves ( 13 ). 4. wiping strip for a windscreen wiper, with a back strip (3), with a tiltable attached to the back strip (3) wiping lip (5), wherein the wiper lip (5) has a wiping edge (9), and one in the longitudinal direction of the wiper strip ( 1 ) extending cavity ( 21 ), characterized in that the wiper lip ( 5 ) via two flexible webs ( 7 ) is at least indirectly connected to the back rail ( 3 ), that the cavity ( 21 ) from the back bar ( 3 ), the wiper lip ( 1 ), and the webs ( 7 ) are limited in the circumferential direction so that in the back bar ( 3 ) and / or the webs ( 7 ) in the longitudinal direction of the wiper bar ( 1 ), a plurality of openings ( 27 ) directed towards the window ( 31 ) to be wiped , 29 ) are present and that the openings ( 27 , 19 ) open into the cavity ( 21 ). 5. wiper strip according to claim 4, characterized in that in the cavity ( 21 ) grooves ( 13 ) for receiving a spring rail ( 15 ) are provided, and that the wiper lip ( 5 ) with its side facing away from the wiper edge ( 9 ) (11 ) against a spring rail ( 15 ) located in the grooves ( 13 ). 6. Wiper strip according to one of claims 4 or 5, characterized in that the cavity ( 21 ) is closed at the ends by a closure piece ( 33 ). 7. wiper strip according to claim 6, characterized in that the closure piece ( 33 ) has a connecting piece ( 43 ) for a hose or a line ( 45 ). 8. wiper strip according to claim 6 or 7, characterized in that the closure piece ( 33 ) is positively connected, in particular by a with at least one recess ( 41 ) of the spring rail ( 15 ) cooperating wedge ( 37 ) with the spring rail ( 15 ). 9. wiper strip according to one of claims 4 to 8, characterized in that in the tilted state of the wiper lip ( 5 ), the openings ( 29 ) located in the web ( 7 ) on one side of the wiper strip ( 1 ) are squeezed together. 10. Wiper strip according to one of claims 4 to 9, characterized in that the wiper lip ( 5 ) has two stop webs ( 17 ) projecting into the cavity ( 21 ), and that in the tilted state of the wiper lip ( 5 ) one of the stop webs ( 17 ) close the openings ( 27 ) in the back bar ( 3 ) or the rib ( 19 ) on one side of the wiper bar ( 1 ). 11. Wiper strip according to one of the preceding claims, characterized in that the spring rail ( 15 ) has a guide groove ( 16 ) on its side facing the wiper lip ( 5 ). 12. Wiper strip according to claim 11, characterized in that the opening angle of the guide groove ( 16 ) is greater than 90E. 13. wiper strip according to one of the preceding claims, characterized in that the wiper strip a symmetrical outer contour and / or a symmetrical Cross-sectional profile of the inner areas of Has back strip, wiper lip and webs. 14. Wiper strip according to one of the preceding claims, characterized in that the webs ( 7 ) are designed as a film hinge. 15. Wiper blade according to one of the preceding claims, characterized in that the wiper strip ( 1 ) and the spring strip ( 15 ) form-fitting at their ends, in particular by a wedge ( 37 ) interacting with at least one recess ( 41 ) in the spring rail ( 15 ), are interconnected. 16. Wiper strip according to one of the preceding claims, characterized in that the spring rail ( 15 ) and / or the groove ( 13 ) have a friction-reducing coating, in particular made of Teflon. 17. Wiper strip according to one of the preceding claims, characterized in that a wiper strip adapter ( 49 ) connected to the wiper strip ( 1 ) in a form-fitting manner is present. 18. Wiper strip according to one of the preceding claims, characterized in that the outer contour of the wiper strip ( 1 ) is designed to be streamlined. 19. Wiper strip according to one of the preceding claims, characterized in that the wiper lip ( 5 ) or the back bar ( 3 ) have two stop webs ( 17 ) projecting into the cavity ( 21 ), and that the stop webs ( 17 ) in cooperation with the back bar (3) or of the wiper lip (5) limiting the tilting movement of the wiper lip (5).