WO2004098963A1 - Connecting device for a blade on the wiper arm of a windshield wiper system - Google Patents

Abstract

The invention relates to a connecting device for a blade on the wiper arm of a windshield wiper system, said wiper blade being formed by a springy support element that is provided with a wiper strip. The inventive connecting device comprises a holding mechanism that is fastened to the outer edges of the support element, and a connecting bolt which is disposed on the holding mechanism and runs transversal to the longitudinal extension of the wiper blade. The aim of the invention is to design such a connecting device in such a way that the parts which are subject to wear are placed on the wiper blade. Said aim is achieved by the fact that an adapter bracket (9, 21, 26, 30, 37, 43, 48, 54, 60) is hinged to the connecting bolt (8, 42, 53). The final piece (19, 22, 24, 27, 36, 39, 44, 52, 55, 62) of the wiper arm (2), which is adapted to said adapter bracket, can be joined in a fixed and detachable manner to the adapter bracket via a locking connection or latch and is connected thereto in a fixed manner in the assembled state of the wiper blade (1). The adapter bracket (9, 21, 26, 30, 37, 43, 48, 54, 60) is embodied such that the connecting bolt (8, 42, 53), and thus also the wiper blade (1), is able to perform a swinging movement relative thereto (9, 21, 26, 30, 37, 43, 48, 54, 60), said swinging movement being due to and determined by a curvature of the vehicle window.

Description

 Connection device for a wiper blade on the wiper arm of a wiper system

The invention relates to a connection device for a wiper blade on the wiper arm of a windshield wiper system for a vehicle, in particular for a wiper blade arranged next to the wiper arm in the projection onto the windshield.

The arrangement of a wiper blade on the wiper arm of a windshield wiper system takes place via a connection device, directly or via an elaborate bracket system, the direct arrangement having the advantage of a small overall height. Solutions with such an arrangement are, for example, in DOS 23 24 702, DE 34 24 729 A1, DE 197 29 864 A1, DE 197 29 865 A1, DE 199 35 861, DE 296 11 722 U1 and WO 99/36300. A wiper blade for such an arrangement generally has a curved elastic carrier and a wiper strip with a wiper lip which rests elastically on the respective window of the vehicle as a result of a contact pressure applied to the wiper blade by the wiper arm.

The windshield wiper described in DE 197 29 864 A1 has a wiper blade with a resilient support element for the wiper strip, on the side of which is turned away the connection device which can be connected to the driven wiper arm is held, this being assigned to a recess in the wiper strip. The support element formed from two parallel spring rails engages in two longitudinal grooves formed opposite one another on the wiper strip and is secured in the longitudinal grooves by a holder which overlaps the outer longitudinal edges of the spring rails. The holder has two flange-like projections which extend in the longitudinal direction of the support element, are arranged standing up to the window and extend away therefrom, to which a hinge pin arranged transversely to the longitudinal extension of the wiper blade and approximately in the wiping direction thereof is fastened for a bearing receptacle formed on the wiper arm.

Furthermore, DE 199 24 662 A1 discloses a windshield wiper for motor vehicle windshields, which only wears one on the wiper arm K 11760 wg-su

- 2 -

Side protruding connecting bolt for a receiving bearing arranged on the wiper blade. To secure the connection between the wiper blade and the wiper arm in the axial direction of the connecting pin, a securing clip is arranged in parallel on the wiper arm and at a distance from the connecting pin on its side facing away from the free end of the wiper arm, which overlaps the wiper blade on the side facing away from the window and thus visibly , It has also already been proposed (DE 101 60 111.5) that the connection device is formed from an adapter (end piece) arranged on the wiper arm with an air guide profile and a mounting block (adapter block) fixedly arranged on the wiper blade, the protruding only on one side Connection bolts arranged either on the end piece or on the mounting block and the bearing holder is formed on the other part. With these connection devices, both the device elements arranged on the end piece of the wiper arm and the device elements arranged on the wiper blade are subject to wear.

The invention has for its object to design a connection device according to the preamble of claim 1 so that the elements subject to wear are arranged on the wiper blade.

This object is achieved in a connection device according to the preamble of claim 1 by its characterizing features. Advantageous configurations are listed in the subclaims.

The invention consists in a connection device for a wiper blade on the wiper arm of a windshield wiper system, which (in a known manner) has a holding device fixed to the wiper blade and a connecting bolt arranged thereon and extending transversely to the longitudinal extension of the wiper blade, in which a between the holding device and the end piece of the wiper arm Adapter bracket is arranged. The adapter block is articulated on the connecting bolt and guided on the holding device, corresponds to the end piece of the wiper arm and is arranged on the wiper arm with this adapted end piece via a releasable connection, for example a latching connection or a latch. The adapter bracket is designed in such a way that the connecting bolt and thus also the wiper blade can execute a certain oscillating movement, which is caused by the curvature of the vehicle window, with respect to the latter and thus also with respect to the wiper arm. The adapter bracket arranged in a fixed position on the end piece of the wiper arm as a fixed component of the wiper blade is thus a movement mediator K 11760 wg-su

between the wiper blade and the wiper arm and at the same time holding element for this. The elements which enable the wiper blade to move relative to the wiper arm and the guidance between the adapter block and the holding device are thus formed exclusively on the wiper blade. This means that only the wiper blade can be regarded as a wearing part of the windshield wiper. The assembly and disassembly of a wiper blade on the wiper arm is simple and error-free. The connection between them is stable and robust and can withstand the loads at high driving speeds.

The adapter block is preferably a hood-shaped cast part made of a dimensionally stable plastic or metal, in particular light metal, which covers the holding device and at least partially rests on the longitudinal sides thereof which are formed parallel to the longitudinal extension of the wiper blade and on which bearings for the connecting bolts are formed. These can advantageously be designed as snap-in receptacles for the ends of the connecting bolt, the snap-in receptacles each being provided with an insertion slot which has an insertion opening on the side of the adapter block facing the wiper blade. As a result, the adapter block can be arranged in a simple manner on the connecting pin and thus also on the holding device when the connecting pin is inserted into the two insertion slots by exerting pressure by means of which the connecting pin is brought into engagement with the latching receptacles. The adapter bracket is thus articulated on the holding device and guided through the partial contact with it without tilting.

The end piece of the wiper arm is expediently designed such that when the wiper blade is arranged on the wiper arm, the adapter bracket engages positively or essentially positively, so that the wiper blade is also held stable and free of tilting in relation to the vehicle window.

Compared to the wiper blade, the adapter bracket is arranged at a distance to enable it to oscillate around the connecting bolt, which, due to the curvature of the vehicle window, must be enabled so that the wiper blade rests on the vehicle window in any position with the required contact pressure , To limit movement, stop surfaces can be formed on both sides of the connecting bolt on the side of the adapter block facing the wiper blade. K 11760 wg-su

- 4 -

Various embodiments of the connection device are listed in the subclaims and are explained below with reference to drawings. All of these embodiments enable simple and thus quick disassembly and assembly of the wiper blade equipped with such a connecting device on the associated wiper arm of a windshield wiper.

1a to c, a connection device for a wiper blade 1 on the wiper arm 2 of a windshield wiper system is shown. The wiper blade 1 has a support element formed from two spring rails 3 for a wiper strip 4 with a wiper lip 5 and a holding device 7 which is clamped on the outer edges of the spring rails 3 by means of claw-like feet 6 and which overlaps the wiper strip 4 on the side of the spring rails 3 facing away from the wiper lip 5 with a connecting bolt 8 fastened transversely to the longitudinal extent of the wiper blade 1 in a through hole. The holding device 7 is arranged in the region of an interrupted spoiler strip, which is likewise held on the outer edges of the spring rails 3 and overlaps the wiper strip 4 and of which a section of one part is shown. The connecting bolt 8 is used for the rotatable arrangement of an adapter block 9, which is shown in Fig. 1b.

This adapter block 9 is a hood-like, cuboid-shaped AI casting, which encloses the holding device 7 in the assembled state and on the longitudinal side walls of which a bearing 10 is formed for the connecting bolt 8. The bearings 10 are provided on the side of the adapter block 9 facing the wiper blade 1 with an insertion gap 11 for the connecting bolt 8 and have a slot 12 on the side opposite the insertion gap 11 for the elastic expansion of the bearing 10. On its two end faces, the adapter bracket 9 is provided with a recess 13, each of which forms two opposite guide surfaces 14, with which the adapter bracket 9 rests movably on the holding device 7 and through which it is guided. Due to the rotatable arrangement of the adapter block 9 on the connecting bolt 8 and its end guide on the holding device 7, a swinging movement around the connecting bolt 8 is ensured.

To ensure an unobstructed swinging movement, the adapter block 9 forms a gap on its side facing the wiper blade 1 with respect to the edges of the spring rails 3 and also has recesses 15.1 and 15.2 which enable the same to be inclined around the connecting bolt 8 without hindrance, whereby K 11760 wg-su

the recesses 15.1 serve to receive the feet 6 at a corresponding inclination.

Furthermore, the adapter bracket 9 is provided on its two longitudinal sides with a locking lug 16, which is formed on an elastically bendable tongue 17 on the wall of the adapter bracket 9, which is formed at its free end to a slightly outwardly protruding operating handle 18.

The wiper arm 2 is formed at its free end to an adapted to the adapter bracket 9 end piece 19, which can be arranged on the adapter bracket 9 essentially in a form-fitting manner, such that the wiper blade 1 can perform swinging movements without hindrance. To fix it to the adapter bracket 9, the end piece 19 has locking recesses 20 corresponding to the locking lugs 16, into which the locking lugs 16 engage when the wiper blade 1 is in the assembled state, for which purpose this can simply be pressed into the end piece 19. To disassemble the wiper blade 1, the operating handles 18 are pressed together, as a result of which the locking lugs 16 disengage from the locking recesses 20, and the wiper blade 1 is pulled off the end piece 19.

2a and 2b show the design of a connection device, which differs from the one described above only in that two locking lugs 16 with operating handles 18 are formed on the longitudinal sides of the adapter bracket 21, which have locking recesses 20 in the end piece 22 of the wiper arm 2 Intervention can be brought. The design contributes to increasing the stability of the fastening arrangement. FIG. 2a shows the adapter bracket 21 already mounted on the holding device 7, via which the wiper blade 1 can be pressed into the end piece 22 in a simple manner.

In the embodiment according to FIGS. 3a and 3b, the one pair of locking lugs is replaced by two curved sliding blocks 23, which can be brought into engagement with gap openings 25 formed in the end piece 24 (FIG. 3b) and curved in the same way. The curvatures are slightly convex with respect to the locking lugs 16 formed on the other side of the connecting bolt 8 and also serve to increase the stability of the fastening arrangement in the sense of additional securing. However, the assembly of the wiper blade 1 on the end piece 24 is associated with an insertion of the sliding blocks 23 into the gap openings 25 and is thus somewhat more difficult than the embodiment according to FIG. 2. With increasing penetration of the K 11760 wg-su

Sliding blocks 23 in the gap openings 25, the angle of inclination of the wiper blade 1 with respect to the end piece 24 becomes ever smaller as a result of the curvature and is zero in the latching position in which the latching lugs are snapped into the latching recesses 20.

A further embodiment of a connection device is shown in FIGS. 4a and 4b. In this case, the adapter bracket 26 is provided on its side facing away from the wiper blade 1 and toward the end piece 27 with an elongated rotary knob 28 (not shown) which is spring-loaded in the direction of the adapter bracket 26 and which has an opening arranged in the end piece 27 and adapted to its shape 29 can be brought into engagement. In the fastening position, in which the adapter bracket 26 is inserted into the end piece 27, this rotary knob 28 projects through the opening 29 of the end piece 27 and beyond and can be gripped, easily pulled out and rotated, in particular by 90 °, the pulling out of the Rotary knob is only possible until its underside has the level of the top ^{r of} the end piece 27 and can be rotated. The design of the rotary knob 28 and opening 29 and the turning of the rotary knob 28 locks the adapter bracket 26 with the end piece 27.

5a and 5b show a further embodiment of a connection device with a latching device. On the adapter bracket 30 on the side facing away from the wiper blade 1 there is a spring-elastic tongue 31 with a locking button 32, and on the side facing the wiper blade 1 on the longitudinal walls of the adapter bracket 30 there are locking recesses 33 with stop surfaces for one with locking projections 34 for this and with an opening 35 provided end piece 36 is arranged. To assemble the wiper blade 1, the adapter bracket 30 is inserted into the end piece 36 until it abuts the upper wall of the end piece 36 with the tongue 31 while the latching button 32 is pressed down elastically. Subsequently, the wiper arm 1 is displaced relative to the end piece 36 in the longitudinal direction thereof until the latching projections 34 fully engage with the latching recesses 33. In this position, the locking button 32 corresponds to the opening 35 and snaps into it, as a result of which the adapter bracket is firmly connected to the end piece 36. Disassembly of the wiper blade 1 is carried out by pressing down the locking button 32 and then moving the wiper blade 1 out of the locking position. K 11760 wg-su

6, the cuboid adapter block 37 is provided on the side facing away from the wiper arm with an end wall which protrudes beyond the side walls and forms a stop surface 38 for the end piece 39. In addition, a detent 16.1 is formed on the adapter bracket 37 on its two long sides. The end piece 39 has, with the latching lugs 16.1 in the latching position with the adapter bracket 37, corresponding latching recesses 40 and on the inside of its longitudinal side walls inward-pointing projections 41 for engaging under the adapter bracket 37. A sliding movement along the end piece 39 makes this with the adapter bracket 37 provided wiper blade 1 as far as the end face of the end piece 39 is pushed into the stop face 38, the adapter bracket 37 being gripped by the projections 41. In this end position, the locking lugs 16 engage with the locking recesses 40 and fix the adapter bracket 37 on the end piece.

7a and 7b is formed from an adapter block 43 articulated on a connecting bolt 42 and a correspondingly adapted end piece 44. On the long sides of the adapter block 43, the ends of the connecting bolt 42 protrude and are flattened, the flattening D being essentially perpendicular to the longitudinal extent of the wiper blade 1. The adapter block 43 also has two locking lugs 16. The end piece 44 is provided on the end face with two latching receptacles 45, each with an insertion opening 46 for the flattened ends and with latching recesses 47 for the latching lugs 16, the thickness of the flattened area (D) being substantially equal to the width of the insertion opening 46 at its narrowest point , The wiper blade 1 is inserted perpendicularly to the end piece 44 with the ends of the connecting bolts 42 into the latching receptacles 45, brought through 90 ° in parallel to the wiper arm 2 and thus into the latching position of the latching lugs 16 with the latching recesses 47. In their latched position, the insertion openings 46 are arranged parallel to the wiper blade 1 and perpendicular to the flattening D, so that the ends of the connecting bolt 42 are also fixed due to the latching of the latching lugs 16 and the wiper blade 1 is fixed on the wiper arm 2.

Fig. 8 shows another design of a connection device. In this, the adapter bracket 48 is a casting with a cylindrical outer surface and, as in the embodiments described above, articulated on the connecting bolt 8 of the holding device 7 and at a distance from the wiper blade 1. At the end facing away from the end of the wiper arm, the adapter bracket 48 is provided with a K 11760 wg-su

- 8th -

Provide end wall 49, which protrudes beyond the lateral surface and at the same time forms an abutment for spring means 50 arranged thereon. In the lateral surface, axially parallel and opposite to it, ie offset by 180 °, two guide grooves 51 are provided, each with a 180 ° bend at the end facing the end wall 49. Inside the end piece 52, which is adapted to the lateral surface, two guide pins (not shown) are arranged for engagement with these guide grooves 51. For assembly, the wiper blade 1 is rotated about its longitudinal axis until the guide grooves 51 correspond to the guide pins and then inserted into the end piece 52 and twisted and locked at the stop, as in the case of a bayonet lock, the spring means 50 inserting the adapter bracket 48 into the Press the locking position and hold it there.

The connecting device shown in FIG. 9 has a connecting bolt 53 which is fixedly connected to the holding device 7, the ends of which protrude on both sides of an adapter block 54 and are flattened parallel to the wiper blade 1 and are slightly curved concavely in relation thereto. In contrast to the embodiments described above, the adapter bracket 54 is firmly connected to the holding device 7, of which only the feet 6 can be seen, and is concavely curved on the side facing away from the wiper blade 1. The end piece 55 has in its two longitudinal walls an elongated and corresponding to the respective projecting end of the connecting bolt 53 and its curvature guide 56 with an insertion gap 57 on the side facing the wiper arm 1. The insertion gap 57 is as wide as the end of the connecting bolt 53 is long. The wiper blade 1 is mounted in parallel alignment with the end piece 55, in which the connecting bolt 53 is pushed over the insertion gap 57 and then by moving the wiper blade 1 in the direction of the wiper arm 2 into the link guide 56. In this, the connecting pin 53 is guided to move back and forth and, due to the curvatures, can perform the oscillating movements required during operation of the windshield wiper.

The connection device shown in FIGS. 10a to 10c has a U-shaped holding device 58, which cannot be seen any further and which is clamped with claw-like feet 59 on the outer edges of the spring rails 3. The adapter bracket 60 articulated on the holding device 58 on the connecting bolt 8 is provided with a rectangular opening 61 on the side facing away from the wiper blade 1 in the region between the legs of the holding device 58, which corresponds to a rectangular, but wider opening 63 formed on the end piece 62 , K 11760 wg-su

These two openings 61, 63 are assigned a V-shaped, elastically compressible latching element 64 (FIG. 10c), which is provided with latching rails 65 arranged on its outer sides and with outwardly facing stop rails 66 on the free leg ends, the distance between the Locking rails 65 and the stop rails 66 correspond to the sum of the thicknesses of the walls 67 and 68 of the adapter block 60 and the end piece 62 facing away from the wiper blade 1. To assemble the wiper blade 1 on the wiper arm 2, it is inserted into the end piece 62 until the adapter bracket 60 stops on the wall 68 and is locked by inserting the elastically compressed locking element 64 with subsequent widening thereof.

K 11760 wg-su

- 10 -

B EZU GSZE I C H E M ISTE

1 wiper blade

2 wiper arm

3 spring rails

4 wiper strip

5 wiper lip

6 feet

7 holding device

8 connecting bolts

9 adapter bracket

10 bearings

11 insertion gap

12 slot

13 recess

14 guide surface

15.1 recess

15.2 recess

16 latch

16.1 latch

17 tongue

18 Operating handle

19 end piece

20 recess

21 adapter bracket

22 end piece

23 sliding block

24 end piece 5 gap opening

26 adapter bracket

27 End piece 8 rotary knob

29 opening 60 wg-su

- 11 -

adapter Bock

tongue

Raslknopf

recess

catch projection

opening

tail

adapter Bock

stop surface

tail

recess

head Start

connecting bolt

adapter Bock

tail

latching receptacle

insertion

recess

adapter Bock

end wall

spring means

guide

tail

connecting bolt

adapter Bock

tail

link guide

introduction gap

holder

foot

adapter Bock

opening

tail

opening

locking element

locking rail

stop element K 11760 wg-su

-12-

67 wall

68 Wall D flattening

Claims

K 11760 wg-su- 13 -PATE NTAN SP RU GHE 1.Connection device for a wiper blade on the wiper arm of a windshield wiper system, which is formed from a resilient supporting element with a wiper strip, with a holding device fastened to the outer edges of the supporting element and a connecting bolt arranged transversely to the longitudinal extent of the wiper blade on the holding device, characterized in that on the Connection bolt (8, 42, 53) an adapter block (9, 21, 26, 30, 37,43, 48, 54, 60) is articulated, with which the end piece (19, 22, 24, 27, 36, 39, 44, 52, 55, 62) of the wiper arm (2) can be detachably connected via a latching connection or latching and is firmly connected in the assembled state, ^r and that the adapter bracket (9, 21, 26, 30, 37, 43, 48, 54, 60) is designed in such a way that the connecting bolt (8, 42, 53) and thus also the wiper blade (1) have an oscillating movement relative to the vehicle window (9, 21, 26, 30, 37, 43) that is determined and determined by the curvature of the vehicle window , 48, 54, 60) can lead. 2. Connection device according to claim 1, characterized in that the adapter block (9, 21, 26, 30, 37, 43, 48, 54, 60) is a hood-like casting part including the holding device (7, 58) made of a dimensionally stable material, on the bearing (10, 45, 56) for the connecting bolts (8, 42, 53) are formed. 3. Connection device according to claim 2, characterized in that the bearings (10, 45, 56) are designed as snap-in receptacles, each of which is provided with an insertion slot (11, 46, 57) which has an insertion opening on the wiper blade (1) facing side of the adapter block (9, 21, 26, 30, 37, 43, 48, 54, 60). 4. Connection device according to claim 1 or 2, characterized in that the end piece (19, 22, 24, 36, 37, 43, 48, 54, 60) of the wiper arm (2) the adapter bracket (9, 21, 26, 30, 37, 43, 48, 54, 60) engages positively or essentially positively. K 11760 wg-su - 14 - 5. Connection device according to claim 1 or 2, characterized in that the adapter block (9, 21, 26, 30, 37, 43, 48, 54, 60) on its side facing the wiper blade (1) has a swinging movement enabling the distance to this one. 6. Connection device according to claim 1 or 2, characterized in that the latching connection from the adapter bracket (9, 21) on both sides outwardly projecting latching lugs (16) and on the end piece (19, 22) of the wiper arm (2) formed latching recesses (20) for this is formed. 7. Connection device according to claim 6, characterized in that on the outer sides of the adapter block (21) on the locking lugs (16) facing away from the connecting bolt (8) each have a sliding element (23) formed and on the end piece (24) gap recesses (25) are designed for this, and that the adapter bracket (21) can be brought into the latching position by means of the sliding elements (23) which can be brought into engagement with the gap recesses (25). 8. Connection device according to claim 1 or 2, characterized in that on the adapter bracket (26) on the side facing away from the wiper blade (1) a rotary closure element (28) is arranged which corresponds to an opening (29) formed on the end piece (27) and which engages behind the end piece (27) on the side facing away from the wiper blade (1) in the closed position. 9. Connection device according to claim 1 or 2, characterized in that on the adapter bracket (30) on the side facing away from the wiper blade (1) has a resilient tongue (31) with a locking button (32) and on the side facing the wiper blade (1) locking recesses (33) are arranged on the end piece (36) with an opening (35) corresponding to the locking button (32) and on the side facing the wiper blade (1) facing inward locking projections (34) for the locking recesses (33), which can be brought into engagement with one another by a sliding movement of the wiper blade (1) essentially parallel to the wiper arm (2), in such a way that the end piece (36) engages under the adapter bracket (30), and that the latching button (32) in the latching position in a form-fitting manner the opening (35) engages. K 11760 wg-su - 15 - 10. Connection device according to claim 1 or 2, characterized in that the adapter block (37) is provided with a stop face (38) for the end piece (39) on the end face on the ropes facing away from the wiper arm end and on both sides in each case an outwardly projecting latching lug (16 ) has that on the end piece (39) on the wiper blade (1) side facing inward projections (41) for reaching under the adapter bracket (37) and locking recesses (40) for the locking lugs (16) are arranged by a sliding movement of the wiper blade (1) can be brought into engagement with one another essentially parallel to the wiper arm (2). 11. Connecting device according to claim 1 or 2, characterized in that the connecting bolt (42) on the adapter block (43) protrudes on both sides and is flattened and the adapter block (43) at a distance from the connecting bolt (42) on both sides has an outwardly projecting locking lug (16 ), the flattening (D) being made substantially perpendicular to the wiper blade (1), that the end piece (44) has two locking receptacles (45) for the flattened ends of the connecting bolt (42) and a gap-shaped recess (46 ) for inserting the ends and two locking recesses (47) for the locking lugs (16), the thickness of the flattened area (D) being equal or insignificantly greater than the width of the recess (46), and that the wiper blade (1) in the locking position with the ends of the connecting bolt (42) with the locking receptacles (45) and with the locking lugs (16) with the locking recesses (47) is engaged, the gap-shaped mige recess (46) is arranged parallel to the wiper blade (1) and at right angles to the flattening (D). 12. Connection device according to claim 1, characterized in that the adapter block (48) is a holding device (7) including a casting with a cylindrical lateral surface and with a front face on this on the side facing away from the wiper arm end projecting stop surface (49) with its The longitudinal axis is arranged parallel to the wiper blade (1), that in the lateral surface axially parallel two guide grooves (51) are formed for a bayonet lock, in each of which a guide pin arranged in the end piece (52) of the wiper arm (2) engages, and that the locking position by the stop surface (49) arranged spring means (50) is secured, which act on the end piece (52) in the direction of the wiper arm (2). K 11760 wg-su - 16 - 13. Connection device according to claim 1 or 2, characterized in that the adapter block (54) firmly connected to the holding device (7) and the connection bolt (53) protrudes on both sides thereof and flattened parallel to the wiper blade (1) and is concavely curved relative to this that the adapter bracket (54) on the side facing away from the wiper blade (1) is concavely curved relative to it and in its longitudinal direction, that on both sides of the end piece (55) an elongated and corresponding to the respective projecting end of the connecting bolt (53) and its curvature Recess (56) is introduced, on which a slot recess (57) directed towards the wiper blade (1) is formed for inserting the end on the side facing the end of the wiper arm (2), and that in the locked position of the connecting bolts (53) in the recess (56) is arranged to move back and forth and the end piece (55) rests tiltably on the adapter bracket (54). r 14. Connection device according to claim 1, characterized in that the adapter block (60) on the side facing away from the wiper blade (1) has a rectangular opening (61) which has a rectangular but wider opening (63) formed on the end piece (62). corresponds, and that in the latching position of the adapter block (10) with the end piece (62) in these openings (61, 63) a V-shaped, elastically compressible latching element (64) can be arranged, which is arranged with latching rails (65) arranged on the outer sides thereof. engages under the adapter bracket (60) at the opening (61) and rests on the edge of the opening (63) on the end piece (62) with stop rails (66) formed on the free leg ends. 15. Connection device according to claim 6, 7, 10 or 11, characterized in that the latching lugs (16) on resilient tongues (17) are formed, and that operating handles (18) are formed on the tongue ends.