DE2829437A1 - Rattle free clip for windscreen wiper for heavy vehicles - has sprung cheeks with profiled edges which increase grip effect - Google Patents

Abstract

The windscreen wiper arm is clipped to the wiper blade using U-shaped clip (3) with sprung jaws which are profiled to impart an improved grip and prevent any rattling. The grip ensures that the wiper blade is accurately guided on the arm for improved cleaning. The profiles are in two planes so that any tilting of the coupling is prevented, with the clip stamped and moulded from metal sheet.

Description

The invention relates to a wiper blade with the features of

Preamble of claim 1.

As is the case with all industrial products, so are the wiper blade, the wiper arm and the associated connecting piece in their dimensions afflicted with manufacturing tolerances. Because of these tolerances occurs there is play between the individual parts of the wiper arm / wiper blade connection, so that an impermissible movement of the parts against each other is possible. Also leads the constant relative movement during operation of the windshield wiper system disturbing noises. In addition, the lacquer layer on the rubbing against each other Parts damaged. Penetrating dirt particles accelerate due to their lubricant-like Effect destroys the anti-corrosion layer. If this protective layer is destroyed, the play between the wiper blade, connecting piece and wiper arm is increased, so that the wiper blade tends to rattle. This gives rise to the requirement, the connection to design between the wiper arm and wiper blade as free of play as possible.

There are known connectors in which a wiper arm with straight End the last part of the way against the when you push into the connector Resistance of a spring is moved until there is a latching between the wiper arm and the connecting piece takes place. The game, especially the longitudinal game between these two parts is reduced by this, but it is still a more damaging one in the wiping movement Cross play available. In any case, there is one between the wiper blade and the connecting piece Relative movement not switched off.

Therefore, it is the object of the present invention to reduce the game between To reduce the wiper blade, connecting piece and wiper arm and thus those listed above To eliminate disadvantages of previously known wiper arm-wiper blade connections.

This task is performed by a wiper blade with the characteristics of the characteristic Part of claim 1 solved.

The guide cheeks of the connecting piece for the wiper arm can curved outwards and / o # ternac # inwards. After assembling the individual elements is then at least either the que # play between the wiper blade and the connector or eliminated between the wiper arm and the connecting piece, since the curvature of the guide cheeks is designed so that this is the largest possible gap with the specified tolerances can bridge. Since the parts between which the game is to be prevented, lie against each other on a large area, not only does the cross play disappear, but also the longitudinal play is caused by the increased frictional force that has to be overcome greatly diminished.

The resilient design of the guide cheeks is particularly simple Wiper arm when using a two-legged locking spring as a connecting piece. Since the guide cheeks are free with their outer end, they can easily be one outward or inward curvature can be specified.

Both the play between the wiper arm and the connecting piece as well as between The connecting piece and the wiper blade can be removed at the same time if the guide cheeks have the shape of a wavy line, so that through the tolerance zones of all parts predetermined largest possible added width of the game between wiper arm, connecting piece and wiper blade is covered. This ensures that the parts in each Fall together. The wavy line can be a sine curve or arcs of a circle be composed. In the latter case it is possible that the curvature of the arcs, the wave crests are different from that of the wave troughs.

Are the guide cheeks corrugated in their longitudinal direction, i.e. as the wiper arm progresses in the longitudinal direction, wave crests and wave troughs alternate off, so the suspension becomes the This significantly improves the guide cheeks, that in each case at the wave crests and troughs, i.e. where the wiper arm and wiper blade preferably touch the connecting piece, the guide cheeks through slots from the remaining parts of the connector are separated over a certain distance that can be different for wave crests and wave troughs.

The slots or recesses can be in the guide cheeks be let in yourself. However, since this leads to a reduction in the resilient force the wave extremes, it is better if the recesses are in the to the Guide cheeks of the wiper arm are adjacent parts of the connector.

No slots or recesses are required when using the guide cheeks have a wavy line perpendicular to the longitudinal direction from bottom to top. These Form is therefore easy to handle in terms of production technology. The resilient force the guide cheeks are also not weakened by recesses. Will be a two-legged locking spring is used as a connecting piece, it is cheaper when the free end of the guide cheeks is designed as the extremum of the wavy line is, so that in any case the entire height of the guide cheeks to reduce the mutual play of the wiper blade, connector and wiper arm is exploited.

If the thickness is sufficient, there is one with regard to manufacture even more advantageous training of the resilient guide cheeks. The guide cheeks can then be divided into two lobes in the longitudinal direction by a gap. Both The flaps protrude to the side and preferably form an acute angle with one another. If the wiper blade, the connecting piece and the wiper arm are installed, then this is permitted it is the gap between the two lobes to assume the position determined by the given dimensions.

The reduction of the caused by the manufacturing tolerances Game between the viewed parts by resilient Guide cheeks is supported by the fact that the other surfaces that rest on the wiper arm, be adapted in shape to the shape of the wiper arm. The bigger the touching ones Are surfaces, the less the tendency of the parts to move against each other. Since the embossing of the wiper arm compresses the material at the edges, it appears advantageous to insert a To form a groove. This means that the upset material can get into them during assembly Grooves disappear so that the hook lies flat on the connector.

About the grooves caused by the shape of the wiper arm and the at some designs of the guide cheeks to improve the resilient properties Necessary slots are also in a development of the invention, the walls of the Connection piece with circumferential grooves, i.e. also transverse grooves, and / or bores Mistake. The water that is otherwise between the wiper arm and Connector would accumulate, preferably through the openings in the walls flow away. This causes a quick drying out and the corrosion of the parts, which indeed entails an enlargement of the game, reduced.

In the case of a two-legged locking spring, another Construction according to the invention, the guide cheeks over a possibly existing Wave shape also formed resiliently in that the spring legs from the spring curvature started by at least one recess are slotted. In their end area is this again somewhat widened in a recess, so that the guide cheeks and the leg parts left and right of the recess stand against one another can be moved. This movement is necessary for two side-mounted cams Insert into two holes in the side walls of the wiper blade bracket and the clearances to be able to bridge between the wiper blade and the connector. That I the cams when inserting the locking spring over a certain distance z within of the central bracket are located, so each guide cheek in their area must be moved inwards by the height of the cams, the The recess should be at least twice as wide as a cam is high.

When using such a locking spring results in addition there are two significant advantages to reducing backlash. Because in the middle bracket of the wiper blade the manufacture of the wiper blade becomes essential cheaper.

Second, the opening in the middle bracket can be greatly reduced, so that the number and length of sharp edges and corners is reduced. The assembly of the wiper blade on the wiper arm then happens in the following way: Through the opening In the middle bracket, the hook-shaped end and another adjoining end are first placed Piece of the wiper arm pushed through. Then the locking spring with the Cams inserted into the holes in the side walls of the central bracket. Now can you pull the wiper arm back until it and the locking spring lock together. The wiper arm is now between the guide cheeks, so that the cams the holes can not leave and the locking spring is securely anchored. Should that Wiper blades are replaced, so the latching between the locking spring and wiper arm released, the wiper arm pushed away from the locking spring, the guide cheeks the locking spring is pressed inwards together with the cam and the spring removed so that the wiper arm is pulled out through the opening in the central bracket can be.

In one embodiment, the locking spring described above takes for easier actuation of the resilient guide cheeks, the recess in its end area the entire width of a spring leg. In addition, the guide cheeks have in the area of the spring curvature two wing-like extensions that are pressed together serve the guide cheeks. Since the lever arm is significantly extended by these extensions this is associated with considerably less effort.

If the guide cheeks for the wiper arm only in the end areas of the Spring legs and are present in the area of the spring curvature, the length of the recess so is recessed, the opening in the center bracket of the wiper blade can be opened again be reduced by the thickness of the wiper arm.

In another design, a two-legged locking spring with cams, a recess and movable guide webs is from one leg a resilient element is formed through two slits, while the remaining parts this leg over bridges that support the guide cheeks on the same side Connect the two legs together, at a fixed distance from the other leg are held. This bridging increases the stability of the locking spring significantly increased.

In addition, this measure allows the same locking spring when you provide the resilient element with two locking lugs and through the dimensioning the leg thickness is the inner distance between the two legs of the thickness of one straight wiper arm and the outer distance is the distance of the inner surface of the hook a curved wiper arm adapts, both for wiper arms with straight and such with hook-shaped end can be used.

To make the locking between the wiper arm and the locking spring easy to be able to solve, the resilient element is extended to in a development to wear a U-shaped bracket at its end, which with its legs over the Side walls of the central bracket of the wiper blade protrudes. This allows the resilient Tongue can be operated without rotating the locking spring and the wiper arm. Wear the legs button-like end pieces with which they over the side walls of the wiper blade bracket overlap, so that the possibility of rotation of the locking spring after a Page eliminated. This is not necessary for assembly or operation, it is only complicates the assembly of the wiper blade on the wiper arm.

To further increase the stability of the locking spring, in a development of the locking spring just described, the guide cheeks extended beyond the area of the spring curvature and joined together by a crosspiece tied together. The resulting opening must be so large that the hook-shaped end a wiper arm can be pushed through and tilted over the locking spring to be drawn. Of course, with such a training, a further Wiper arm can be used with a straight end.

Through the training and further developments of an inventive The connecting piece is primarily the cross play between the individual Splitting eliminated, but also the longitudinal play, as already mentioned, reduced. A further reduction in the longitudinal game results when the connector at least one resilient tongue is integrally formed against the resistance thereof the wiper arm is moved just before a detent engages in a detent opening. The resilient tongue presses the latch against a wall of the latch opening. So is movement in one direction is excluded. The other way is one Movement is only possible against the spring force, so also with the appropriate training largely switched off.

The resilient tongue is formed on the connector so that it either abuts against the end face of the wiper arm, or in a recess of the wiper arm engages and presses against a wall of this opening.

If a locking spring is used as a connecting piece, which, as already described, for both a straight and a hook-shaped wiper arm is useful, at least one way or another indicated above two resilient tongues formed on the locking spring, one of which the longitudinal play of the straight wiper arm, the other that of the hook-shaped wiper arm.

Such resilient tongues must not be too long, otherwise they through the recess in the wiper arm over the surface on the other side of the wiper arm protrude, but they must not be too short, because in this one If only small tolerance fields can be compensated. In addition, there is them the danger of being overstretched and thus their resilient properties lose. Because to bridge a certain game between the wiper arm and the connecting piece To be able to do so, they have to bend a lot because of their shortness.

One avoids the indicated difficulties when with one two-legged locking spring the resilient tongue in the area of the spring curvature compensates for the tolerances in the longitudinal direction. In the relaxed state, the resilient one protrudes Tongue so far beyond the outer surface of the locking spring that the greatest possible game is covered. When attaching the hook-shaped wiper arm end the resilient tongue is moved with the curvature of the hook towards the locking spring, until the wiper arm and locking spring engage. By resting against a wall of the locking opening The wiper arm is thus in one of the locking lugs, by contacting the curvature of the hook firmly anchored to the resilient tongue in the other direction.

In the case of a locking spring with a recess and a cam the resilient tongue of a spring leg, if possible from the one who-not the latch carries - otherwise there would be the risk that the locking of the wiper arm will come loose -, outside the recess to the front in the area of the curvature of the locking spring guided. This ensures that the guide cheeks are pressed together without hindrance can be.

On the other hand, however, after the assembly of the wiper blade on the wiper arm the holder of the locking spring in that the wiper arm has the resilient tongue presses into the recess, made even more secure. Because apart from the wiper arm prevented now the resilient tongue also moves the guide cheeks inwards.

In an advantageous further development, such a locking spring left and right of the recess on the remaining parts of the spring legs two resilient tongues molded in the area of the spring curvature.

Even with a locking spring that is inserted into the rivet bolt of a wiper blade is clipped, such an arrangement of the resilient tongues is possible and advantageous. Because the wiper arm now has at least two support points in the area of the spring curvature, ttie fix it in its position better than a single point.

The invention is now based on the embodiments shown in the drawing explained in more detail.

1 shows a section along the plane of symmetry of an inventive Formation of a two-legged locking spring with corrugated guide cheeks and a resilient tongue in the area of the spring curvature, Fig. 2 shows a plan view the locking spring from FIG. 1, FIG. 3 shows a plan view of a further locking spring with a different position of the recesses between guide cheeks and spring legs, Fig. 4 shows a section along the line IV-IV from FIG. 3, FIG. 5 shows a section the plane of symmetry of a locking spring according to the invention, the guide cheeks are corrugated perpendicular to their longitudinal direction and which has a resilient tongue, which strikes against the end face of the wiper arm, Fig. 6 shows a section along the line YI-VI from FIG. 5, FIG. 7 shows a view of the locking spring from Fig. 5 and 6 from behind, Fig. 8 is a plan view of a locking spring according to the invention, whose guide cheeks are split and whose legs are grooved, 9 shows an enlarged section transversely to the longitudinal direction of the locking spring from Fig. 8, Fig.10 a view from below of a further locking spring of the invention with lateral cams and two recesses, FIG. 11 a section along the line XI-XI from Fig. 10, Fig.12 a view - from below on in the invention Locking spring with cams, a recess and a resilient tongue, Fig. 13 a section along the line XIII-XIII from Fig.12, Fig.14 a plan view of a another locking spring with cams and a recess, FIG. 15 a side view the locking spring from FIG. 14, installed in the wiper blade center bracket, FIG. 16 a plan view of a locking spring similar to FIG. 14, but with an extended and guide cheeks connected by a crosspiece.

All locking springs from FIGS. 1 to 8 consist essentially from two mutually resilient legs 1 and 2, which are in the area of the spring curvature 3 are connected to each other and thereby and through their special shape Form receptacle 4 for the rivet bolt of the wiper blade. The spring legs are on the side completed by guide cheeks 5 and 6. The spring leg 2 has a locking lug 7, which engages in a latching opening in the hook-shaped end of a wiper arm. At the appendix 8 of the leg 2, the locking lug 7 can be moved out of the locking opening and so can the wiper arm be solved again.

In the special embodiment according to FIGS. 1 and 2, the guide cheeks are 5 and 6 wavy in the longitudinal direction. The recesses 9 separate on the shafts 10 and wave troughs 11 the guide cheeks of the spring legs.

In the area of the spring curvature 3 is through two narrow slots 12 and 13 and the transverse slot 14 a resilient tongue 15 is formed, which in the relaxed State protrudes beyond the adjacent parts 16 and 17 of the spring leg.

When assembling the wiper arm with its hook-shaped end of Retracted at the front over the locking spring before the locking lug 7 enters the locking opening can engage on the wiper arm, butts the curved inner surface of the hook-shaped wiper arm end against the resilient tongue 15. As the movement continues, this becomes under tension set. Finally, the locking lug 7 engages. The resilient tongue 15 tries to relax and causes the wiper arm with a wall of its latching opening on Rise 18 of the locking lug 7 is applied. This is another movement from the spring curvature excluded away.

A movement in the opposite direction is only against the force of the resilient tongue 15 possible and thus also in normal windshield wiper operation locked out.

The legs 1 and 2 of the locking spring from Figures 1 and 2 are provided with holes 19 through which the penetrated water can drain quickly.

The locking spring according to FIGS. 3 and 4 differs from 1 and 2 once in that the wave crests 10 and wave troughs 11 not through recesses in the guide cheeks 5 and 6, but through recesses 20 in the spring legs 1 and 2 are separated from the spring legs.

Second, there is no resilient tongue in the area of the spring curvature 3 molded, although this is of course also easily possible here. In addition, in the legs are not drilled.

The guide cheeks 5 and 6 of the locking spring shown in FIGS. 5, 6 and 7 are corrugated perpendicular to their longitudinal direction. Therefore there are no dividing slits more required between spring legs 1 and 2 and guide cheeks 5 and 6. The latch 7 and the extension 8 supporting part of the leg 2 is through two longitudinal slots 21 and 22 separated from the rest of the leg, so that the locking between the wiper arm and locking spring is easily detachable. On the extension 8 is a resilient tongue 23 formed which abuts the end face of the wiper arm and so a longitudinal play between the wiper arm and the locking lug.

The guide cheeks 5 and 6 of the locking spring, which are shown in Fig.

8 in a top view in its entirety and in FIG. 9 in a small section shown are split lengthways.

The two separate parts 24 and 25 are at an acute angle from each other. Depending on the wiper blade used with this locking spring and wiper arm occurring dimensions as well as according to the special dimensions of the locking spring even the parts 24 and 25 are more or less pressed together. The pictured The locking spring is also provided with transverse 26 and longitudinal grooves 27. the Longitudinal grooves 27 next to the guide cheeks have one to the side elevations of the wiper arm complementary shape, so that the wiper arm and locking spring form-fit are connected to each other.

At the same time, the longitudinal grooves 27 serve together with the transverse grooves 26 for faster drainage of penetrated water.

10 and 11 show a locking spring with two resilient ones Legs 1 and 2, through two lateral recesses 30 and 31 about their half the length are divided into three parts. The two outer parts 32 carry two cams 33, which engage in two bores in the side walls of a wiper blade center bracket. The guide cheeks 5 and 6 are not designed circumferentially, but they are only in the end areas of the legs 1 and 2 and in the area of the spring curvature 3. Here they carry two wing-like extensions 34 through which the lever arm can be bent the cam 33 is extended.

The locking spring of Figs. 12 and 13 is similar to that constructed from FIGS. 10 and 11. The spring legs 1 and 2 are only through a recess 35 slotted. This recess is between the two cams 33 so wide that the cams 33 with the help of the extensions 34 by pressing together completely can be moved from the holes in the center bracket of the wiper blade to the locking spring to remove. From the leg 1, a resilient tongue 15 is forward into the area the spring curvature 3 out. So that they do not squeeze the thigh side panels together hindered, it must be in the relaxed state #much of the outside of the recess 35 are located.

Likewise, with such a locking spring to the inside of the guide cheeks 5 and 6 remaining leg parts 36 in the area of the spring curvature a resilient tongue be formed.

The locking spring according to FIGS. 14 and 15 also has two lateral ones Cam 33 and a recess 35 through which the guide cheeks 5 and 6 and the cams 33 have become movable.

The parts of the guide cheeks belonging to different legs 5 and 6 are connected to one another via two bridges 37, so that the two legs 1 and 2, which are arranged in parallel, have an invariable distance from each other to have. From the leg 2, however, is a resilient element through the two slots 38 39 out #### i #, 8% ## Ri9 ## e # er thso 2 »7a locking lug on each side 7th and 40 owns. This creates a locking connection between the wiper arm and Locking spring possible. The latch 40 is used to latch a wiper arm with straight, the locking lug 7 for locking a wiper arm with a hook-shaped end. Because in this locking spring, the strength of the legs 1 and 2 is straight is designed so that their inner distance the thickness of a straight wiper arm 48 and their outer distance of the opening between the two hook parts of a curved wiper arm it can be used to attach a wiper blade to both types of wiper arms be used.

The resilient element 39 supports the easy release of the latching its extended end 41 transversely to its longitudinal direction a U-shaped bracket 42, which has two button-like end pieces 43 over the side walls 44 of the central bracket 45 protrudes. The end pieces 43 are each provided with a shoulder 46, which over the side walls 44 engages so that when the two bracket legs 47 are not pressed together the downward rotation of the locking spring is limited.

With a straight wiper arm, the spring is first in the center bracket 45 inserted and then the end of the wiper arm 48 through the 1 and 2 opening 49 of the Middle bracket 45 pushed between the two spring legs. Should the wiper arm 48 are released, the locking spring is pivoted slightly upwards so that the Ends 43 of the U-bracket 42 can be pressed down. The locking lug 40 leaves while the bore 50 of the wiper arm 48, so that this out of the locking spring and the central bracket 45 can be pulled out.

#A wiper arm with a hook-shaped end is attached and detached in the manner already described above.

Compared to the locking spring of FIGS. 14 and 15, the locking springs 16 shows the lateral guide cheeks 5 and 6 over the area of the spring curvature 3 also extended and interconnected by the crosspiece 51, so that the Locking spring becomes more stable. Of course, this execution requires a a, S a a e a larger opening in the center bracket 45 of the wiper blade, since the Wiper arm no longer before inserting the locking spring in the center bracket 44 can be introduced.

It must be pointed out that the individual new elements a connector according to the invention is not always present all at the same time must be. Rather, it will be based on the current requirements. In particular, the new elements can also be used individually with great advantage.

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Claims (26)

Claims: wiper blade, in particular for motor vehicles, with a connecting piece for the articulation of a wiper arm, the laterally attached guide cheeks for the wiper arm, characterized in that the guide cheeks (5,6) transversely are designed to be resilient to the longitudinal direction of the wiper arm. 2. Wiper blade according to claim 1, characterized in that the resilient Guide cheeks (5,6) on a two-legged locking spring with at least a resilient leg (1,2) are formed. 3. Wiper blade according to claim 1 or 2, characterized in that the guide cheeks (5,6) have the shape of a wavy line. 4. Wiper blade according to claim 3, characterized in that the guide cheeks (5,6) corrugated in their longitudinal direction and in each case at the wave crests (10) and wave troughs (ii) over a certain distance through recesses (9) from the other walls (1,2) of the connector are separated. 5. Wiper blade according to claim 4, characterized in that the recesses (9) the guide cheeks (5,6) where they meet other walls (1,2) of the connecting piece adjoin, enforce. 6. Wiper blade according to claim 4, characterized in that the recesses (20) parallel to the guide cheeks (g, 6) in those adjacent to the guide cheeks (5,6) Parts of the remaining walls (1,2) of the connector are embedded. 7. Wiper blade according to claim 3, characterized in that the guide cheeks (5,6) are designed to be wavy perpendicular to the longitudinal direction. 8. Wiper blade according to claim 1 or 2, characterized in that the guide cheeks (5,6) are split in the longitudinal direction, and the two from each other separate parts (24,25) form an angle with one another and protrude to the side. 9. Wiper blade, in particular according to claim 1 or 2, characterized in that that the walls (1,2) of the connecting piece resting against the wiper arm in the areas which border on the guide cheeks (5,6) have a groove (27) whose shape is the The contour that the wiper arm has in the embossed part is complementary. 10. wiper blade, in particular according to claim 1 or 2, characterized in that that the walls (1,2) of the connecting piece, which touch the wiper arm, with circumferential Grooves (26,27) and / or bores (19) are provided which allow rapid drying out cause. 11. Wiper blade, in particular according to at least one of the preceding Claims, wherein the locking spring and the wiper arm by a latching mechanism are securely connected to each other, characterized in that the spring legs (1,2) in the area of the spring curvature (3) carry two cams (33) laterally, which in Snap holes in the side walls (44) of the wiper blade center bracket (45) so that the spring legs (1, 2) are slotted through at least one recess (30,35), which extends from the area of the spring curvature (3) to about the middle of the spring and between the cams (33) is at least as wide as both cams (33) together are high, and that the parts (32,36) lying on both sides of the recess (30,35) the spring leg (1,2) with the cheek parts and cams (33) located there against each other are movable under tension. 12. Wiper blade according to claim 11, characterized in that the recess (35) in its end area on both spring legs (1,2) only a narrow one on the side Leaves the edge. 13. Wiper blade according to claim 11 or 12, characterized in that the guide cheeks (5, 6) each have a wing-like shape in the area of the spring curvature (3) Have extension (34) that when attaching and loosening the locking spring is used by the wiper blade to compress the leg parts (32,36). at least 14. wiper blade according to one of claims 11 to 13, characterized characterized in that the guide cheeks (5,6) only in the end regions of the spring legs (1,2) and in the area of the spring curvature (3) are available. 15. Wiper blade according to claim 11, characterized in that the Recess (35) continuously tapers towards its end, and on one leg (2) in one hole, on the other (1) in one that extends from cheek to cheek Cross slot that runs out of the end region of the first leg (2) by two A resilient element (39) is formed out of slots (38) approximately in the longitudinal direction of the spring is, and that the other parts of this leg (2) by bridges (37) that the Connect the guide cheeks (5,6) of the legs (1,2) at a fixed distance from the other Legs (1) are held. 16. Wiper blade according to claim 15, characterized in that the resilient Element (39) is provided with two locking lugs (7,40) on opposite sides, that the inner distance between the two legs (1,2) the thickness of a straight one Wiper arm and the outer distance the distance of the inner surface of the chopping a curved Wiper arm corresponds. 17. Wiper blade according to one of claims 15 or 16, characterized in that that the resilient element (39) at its extended end (41) transversely to its longitudinal direction carries a U-shaped bracket (42), the legs (47) of which when the locking spring is inserted over the side walls (44) of the wiper blade center bracket (4 ## upright k 18th Wiper blade according to Claim 17, characterized in that the legs (47) have two Wear button-like end pieces (43) each provided with a shoulder (46) and thus overlap laterally over the side walls (44) of the wiper blade center bracket (45). 19. Wiper blade according to at least one of claims 15 to 18, characterized characterized in that the guide cheeks (5,6) over the area of the spring curvature (3) are extended and connected by a transverse wall (51). 20. Wiper blade, in particular according to at least one of the preceding Claims, wherein the connecting piece and the wiper arm by a latching mechanism are securely connected to one another, characterized in that the connecting piece integrally formed carries at least one resilient tongue (15) against its resistance the wiper arm is moved just before a latching lug (7, 40) engages in a latching opening. 21. Wiper blade according to claim 20, characterized in that at least a resilient tongue (23) there on the guide cheeks (5, 6) or the other that The end of a wiper arm enclosing walls (2) of the connecting piece is formed, where the end face of the wiper arm is located, so that the end face abuts against the resilient tongue (23). 22. Wiper blade according to claim 20, characterized in that the guide cheeks (5,6) or other parts (1,2) of the connecting piece resting against the wiper arm or wear several resilient tongues that engage in recesses on the wiper arm. 23. Wiper blade according to claim 16 and one of claims 20 to 22, characterized in that the locking spring has at least two resilient Has tongues, of which at least one of the wiper arm with straight or applied to the hook-shaped end. 24. Wiper blade according to claim 20 with a two-legged locking spring as a connecting piece, characterized in that at least one resilient tongue (15) in the area of the spring curvature (3) in the relaxed state over the outer surface the spring curvature (3) protrudes. 25. Wiper blade according to claims 24 and 11, characterized in that that a resilient tongue (15) which is not wider than the recess (35) at the narrowest Place is from a spring leg outside the recess forward into the area the spring curvature (3) is guided. 26. Wiper blade according to claim 24, characterized in that two resilient tongues on different sides of the plane of symmetry of the locking spring are formed in the area of the spring curvature (3).