Adapter for a wiper system

Abstract

The present invention relates to an adapter (14) for attaching a wiper blade to an arm of a wiper system, the adapter (14) extending along a longitudinal direction (L), the adapter (14) being configured to be rotatably mounted on a connector of the wiper blade, the adapter (14) comprising a locking device (42) intended to block the adapter (14) longitudinally with respect to the arm, the adapter (14) comprising a front portion (14a) and a rear portion (14b) delimited from each other by a plane (P) perpendicular to the longitudinal direction (L) and passing through the locking device (42), the locking device (42) comprising at least one transverse wall arranged in the rear portion (14b) of the adapter (14), the adapter (14) comprising a protuberance which extends between the transverse wall of the locking device (42) and an element of the rear portion (14b) of the adapter (14).

Description

Adapter for a wiping system.

[0001] The field of the present invention is that of wiping systems intended for motor vehicles. More particularly, the field of the present invention is that of adapters arranged between a windshield wiper arm and a wiper blade of such wiping systems.

[0002] Motor vehicles are commonly equipped with wiping systems intended to clean their glass surfaces, and in particular their windshields. Such wiping systems comprise at least one wiper arm and a wiper blade driven by the wiper arm. The wiper arm is connected to an electric motor of the vehicle and the wiper blade comprises at least one wiping blade adapted to come into contact with the glass surface to be wiped. In order to be able to drive the wiper blade, an adapter is arranged between this wiper blade and the wiper arm. More particularly, the adapter is arranged between the wiper arm and a connector connected to the wiper blade.The adapter is then secured to the wiper arm and more particularly to a free end of the wiper arm by means of a locking device, such cooperation being removable so that it allows the wiper blade to be changed when it is worn.

[0003] In order to optimize the cleaning of the glass surfaces of vehicles by means of wiping systems, it is necessary for said wiping systems and in particular the wiper blades to be pressed against the glass surface to be cleaned. Also, means participating in the pressing of the wiper blades are known, such as deflectors arranged on the wiper blades or formed on the adapter, and ensuring, when the vehicle is moving, the pressing of the wiper blades under the effect of an air flow.

[0004] The operation of the wiping system, i.e. the driving of the wiper blade against the glass surface by means of the wiper arm, can also cause the adapter locking device to pivot relative to the adapter body itself. In other words, when the wiper blade rotates against the glass surface, the adapter locking device can be subjected to forces that cause the locking device to twist. Such pivoting of the locking device can then cause premature wear of the adapter locking device, which twists under the effect of the pivoting. Ultimately, it can break and release the wiper blade relative to the wiper arm during operation of the wiping system.

[0005] We can therefore understand the need to remedy the above problem, which could cause incidents, both for the driver of the vehicle which has the wiping system, and also for other road users who may receive the wiper blade thus released.

[0006] The aim of the present invention is therefore to propose an adapter whose locking device has limited pivoting in order to reduce the risks of the wiper blade becoming dissociated from the windscreen wiper arm.

[0007] The main subject of the invention is an adapter for attaching a wiper blade to an arm of a wiping system, the adapter extending along a longitudinal direction, the adapter being configured to be rotatably mounted on a connector of the wiper blade about an axis of rotation transverse to the longitudinal direction, the adapter comprising a locking device intended to longitudinally block the adapter relative to the arm, the adapter comprising a front portion and a rear portion delimited from one another by a plane perpendicular to the longitudinal direction and passing through the locking device, the locking device comprising at least one transverse wall which extends transversely to the longitudinal axis and which is arranged in the rear portion of the adapter, the locking device being pivotally mounted about a tilting axis parallel to the longitudinal direction,the adapter being characterized in that it comprises a protrusion which extends between the transverse wall of the locking device and an element of the rear portion of the adapter.,

[0008] The wiper blade and the arm are part of a vehicle wiping system intended to clean at least part of a glass surface of said vehicle. The wiping system then comprises the arm driven in rotation by an electric motor of the vehicle and ensuring the rotational movement of the wiper blade, to which it is secured via the adapter and the connector, against the glass surface so that the blade carried by the wiper blade clears said glass surface of raindrops and / or solid debris, deposited thereon.

[0009] The locking device also helps to secure the adapter to the arm by locking the adapter onto said arm. By tilting it, the locking device allows the adapter to be mounted and / or removed from the arm. In the rest position, the locking device connects the adapter to the wiper arm at least in translation.

[0010] Advantage is taken of the protrusion which extends between the transverse wall of the locking device and the element of the rear portion of the adapter, in that it forms a stop making it possible to limit the pivoting of the locking device about an axis perpendicular to the longitudinal direction of the adapter and perpendicular, or generally perpendicular to the upper wall of the adapter, so that said locking device is not damaged. This limits the risks of dissociation between the adapter and the wiper arm.

[0011] According to a characteristic of the invention, the adapter comprises at least one side wall and one top wall participating in defining an internal volume of the adapter, the adapter comprising at least one guide duct intended to receive the arm and which extends at least partly into the internal volume of the adapter.

[0012] The guide duct is in particular part of a receiving housing of the arm in the adapter which extends longitudinally in the internal volume of the adapter. More particularly, the receiving housing extends in the front portion of the adapter and in the rear portion of the adapter, with in particular the guide duct, the latter extending in the rear portion of the adapter.

[0013] According to a characteristic of the invention, the guide duct comprises a first longitudinal end through which the arm is intended to enter the guide duct and a second longitudinal end adjacent to the transverse wall of the locking device, the protrusion being formed between the transverse wall of the locking device and the second longitudinal end of the guide duct.

[0014] It is understood that the second longitudinal end of the guide duct constitutes the element of the rear portion of the adapter.

[0015] According to a characteristic of the invention, the protrusion is made of a material with the transverse wall of the locking device.

[0016] According to an example of the invention, the locking device comprises a thrust member and a blocking member, the blocking member ensuring the blocking of the arm in the receiving housing of the adapter and extending at least partly opposite the guide duct in the longitudinal direction of the adapter. Thus, in this example of the invention, the transverse wall of the locking device is part of the blocking member.

[0017] According to an alternative of the invention, the protrusion is made in one piece with the element of the rear portion of the adapter.

[0018] According to the alternative of the invention, the protrusion is made of material with the second longitudinal end of the guide duct forming the element of the rear portion of the adapter.

[0019] According to a characteristic of the invention, the protrusion comprises at least one contact face which extends opposite at least in part the transverse wall of the locking device or the element of the rear portion of the adapter, a longitudinal distance between the contact face and the transverse wall or the element of the rear portion being between 0.1 mm and 1 mm.

[0020] Such a longitudinal distance allows maximum and controlled pivoting of the locking device relative to the adapter without this rotation causing damage to said locking device. The longitudinal distance is taken along a straight line parallel to the longitudinal direction of the adapter.

[0021] According to a characteristic of the invention, the guide duct comprises at least one wall for holding the arm in a vertical direction of the adapter, the protrusion extending in the longitudinal extension of said holding wall.

[0022] According to a characteristic of the invention, the retaining wall extends from the first longitudinal end to the second longitudinal end of the guide duct.

[0023] According to a characteristic of the invention, the protrusion has a complementary shape with the retaining wall of the guide duct, in the longitudinal direction of the adapter.

[0024] According to a characteristic of the invention, the retaining wall of the guide duct comprises a transverse flank, a transverse edge of the protrusion extending in a common plane with the transverse flank.

[0025] According to a characteristic of the invention, the retaining wall comprises at least one bearing surface intended to be in contact with the arm positioned in the guide duct, the protrusion comprising a bearing face which extends in a plane common with the bearing surface of the retaining wall.

[0026] The invention also relates to a connection device for a wiper blade comprising at least one connector and an adapter according to any one of the preceding characteristics, the connector being mounted in rotation around the axis of rotation by means of a rotation device.

[0027] The invention also relates to a wiper blade comprising at least one connection device according to the preceding characteristic or an adapter according to any one of the preceding characteristics.

[0028] The invention also protects a wiping system comprising at least one arm and a wiping blade according to the preceding characteristic, the arm comprising at least one rod housed in the guide duct of the adapter.

[0029] According to a characteristic of the invention, at least one end of the rod takes a shape complementary to the guide duct of the adapter, the rod having a notch cooperating with the locking device to longitudinally block the position of the adapter on the rod.

[0030] Other characteristics, details and advantages of the invention will emerge more clearly on reading the description which follows on the one hand, and several examples of embodiment given for informational and non-limiting purposes with reference to the appended schematic drawings on the other hand, in which:

[0031] is a perspective view of a wiping system comprising at least one arm, a wiping blade and an adapter according to the invention;

[0032] is a top perspective view of the adapter shown in the ;

[0033] is a perspective view from below of the adapter shown in the ;

[0034] is a close-up view of a guide duct of the adapter of the, capable of housing at least in part the arm of the wiping system;

[0035] is a close-up view of an outgrowth of the adapter.

[0036] The features, variants and different embodiments of the invention may be combined with each other in various combinations, provided that they are not incompatible or mutually exclusive. In particular, variants of the invention may be conceived comprising only a selection of features described below in isolation from the other features described, if this selection of features is sufficient to confer a technical advantage and / or to differentiate the invention from the prior art.

[0037] In the figures, elements common to several figures retain the same reference.

[0038] In the following detailed description, the terms "longitudinal", "transverse" and "vertical" refer to the orientation of a wiping system and an adapter according to the invention. A longitudinal direction corresponds to a main direction of elongation of an adapter according to the invention, this longitudinal direction being parallel to a longitudinal axis L of a trihedron L, V, T illustrated in the figures. A transverse direction is parallel to a transverse axis T of the reference frame L, V, T and this transverse axis T is perpendicular to the longitudinal axis L. Finally, a vertical direction corresponds to a direction parallel to a vertical axis V of the reference frame L, V, T, this vertical axis V being perpendicular to the longitudinal axis L and the transverse axis T.

[0039] The illustration shows a wiping system 1 configured to clean a glass surface of a vehicle, for example a windshield, so as to improve the visibility that a driver has of the road in front of the vehicle, for example in rainy weather or to rid said glass surface of solid debris attached to the latter. The wiping system 1 extends mainly along the longitudinal direction L, and comprises at least one wiping arm 2 carrying at one end a wiper blade 4 and being connected at another end opposite in the longitudinal direction L to the vehicle.

[0040] The arm 2 and the wiper blade 4 both extend mainly along the longitudinal direction L of the wiping system 1. The arm 2 more precisely comprises a connecting body intended to secure the arm 2 to the vehicle and a rod 6 extending from the connecting body to one end of the arm 2. The term “rod” is understood to mean a solid element extending along the longitudinal direction L. The rod 6 here has a rectangular section, seen in a plane perpendicular to the longitudinal direction L. However, a rod having a discoid, triangular or other section would not, however, depart from the scope of the invention.

[0041] In addition, the wiper blade 4 is particularly adapted to be driven in rotation by the arm 2 against the glass surface of the vehicle, the arm 2 itself being driven in rotation by a motor, not visible, for example an electric motor carried by the vehicle.

[0042] In order to connect the wiper blade 4 to the end of the arm 2, said wiper blade 4 comprises a connection device 8 comprising at least one connector 10 which carries a wiper blade 12 of the wiper blade 4 and an adapter 14 rotatably mounted on the connector 10, the adapter 14 being able to cooperate with the end of the arm 2. It is understood in particular that the wiper blade 12 of the wiper blade 4 is intended to be in contact with the glazed surface of the vehicle. Furthermore, the connector 10 is configured to carry the wiper blade 12, directly or indirectly.

[0043] The rotation of the adapter 14 and the connector 10 is carried out by means of a rotation device 16, partly visible in the figure, this rotation being carried out around an axis of rotation R substantially parallel to the transverse direction T. A more detailed description of the rotation device 16 will be given in the remainder of the description.

[0044] As more particularly visible in Figures 2 and 3, the adapter 14 extends mainly along the longitudinal direction L. The adapter 1 comprises at least one side wall 18 and one top wall 20, the side wall 18 and the top wall 20 each having a free edge 22, 24 and a common edge 26 to the side wall 18 and to the top wall 20.

[0045] The side wall 18 extends mainly in a plane parallel to the longitudinal L and vertical V directions. The side wall 18 here has a free edge 22 and a common edge 26 with the upper wall 20, the common edge 26 joining the side wall 18 and the upper wall 20 each extending in separate planes.

[0046] The upper wall 20 also has a free edge 24, and extends between its free edge 24 and the common edge 26, presenting a curve, as visible in Figures 1 and 2. It is understood here that the upper wall 20 has a curved profile between the common edge 26 and its free edge 24 seen in the plane perpendicular to the longitudinal direction L, inscribed in a circle.

[0047] The adapter 14 according to the invention thus has an “L” shaped profile section, seen in a section perpendicular to the longitudinal direction L, that is to say which is inscribed in the transverse direction T and in the vertical direction V.

[0048] An internal volume 28 of the adapter 14 is defined, visible in the figure, this internal volume 28 being at least partly delimited by the side wall 18 and the upper wall 20.

[0049] In addition, the adapter 14 comprises at least one internal wall 30 extending at least partly into the internal volume 28 of the adapter 14. More precisely, the internal wall 30 extends in a plane substantially parallel to the longitudinal L and vertical V directions, from the upper wall 20 into the internal volume 28. It is understood that the internal wall 30 extends substantially parallel to the side wall 18.

[0050] According to the invention, the internal wall 30 participates in delimiting at least in part a receiving zone 32 intended to receive the connector. Thus, when the adapter 14 is mounted on the connector, the latter is housed at least in part in the receiving zone 32.

[0051] Furthermore, and as more particularly visible in the, the adapter 14 comprises several walls participating in delimiting the reception zone 32, including in particular the internal wall 30. More particularly, these walls extend in the form of a rectangle, the walls extending in a plane substantially perpendicular to the planes in which the neighboring walls extend. It is therefore understood that the adapter 14 comprises a longitudinal wall 34 extending parallel to the internal wall 30, and two connecting walls 36 extending perpendicular to the longitudinal 34 and internal 30 walls and between the latter. Thus, it is understood that when the adapter 14 is mounted on the connector, the latter is arranged at least in part between the internal wall 30 and the longitudinal wall 34, and between the connecting walls 36.

[0052] As mentioned previously, the adapter 14 is rotatably mounted on the connector by means of a rotation device 38. The latter comprises several elements cooperating with each other and arranged on the one hand on the connector and on the other hand on the adapter 14. Here, only the elements of the rotation device carried by the adapter 14 are visible.

[0053] Thus, and as visible on the, the adapter 14 comprises on the one hand a female element 40a on the longitudinal wall 34 configured to cooperate with a male element of the connector, not visible, and on the other hand a male element intended to cooperate with a female element of the connector, not visible.

[0054] More precisely, the male elements take the form of a tab 40b carrying a strand, and the female elements 40a take the form of an orifice in which the strand is housed and is free to rotate around the axis of rotation R. The tab 40b of the adapter 14 extends, for example, in a plane coincident with the plane in which the internal wall 30 extends, and is delimited from said longitudinal wall 34 by at least one groove and advantageously two grooves extending along the vertical direction V. In this configuration, the tab 40b is elastically deformable while being movable around a direction of rotation parallel to the longitudinal direction L so as to allow the adapter 14 to be mounted on the connector.

[0055] According to a characteristic of the invention, the adapter 14 comprises a front portion 14a and a rear portion 14b, delimited from one another by a plane P perpendicular to the longitudinal direction L and passing through a locking device 42.

[0056] The locking device 42 visible in figures 2 and 3, is intended to longitudinally secure the adapter 14 relative to the arm of the wiping system, the locking device 42 being mounted pivoting on the upper wall 20 around a pivoting axis I, parallel to the longitudinal direction of the adapter 14. The locking device 42 comprises at least one means 44 for limiting its pivoting along the pivoting axis I which comes to bear against the internal wall 30 of the adapter 14 mentioned previously.

[0057] More particularly, the locking device 42 comprises at least one thrust member 46 visible at and a blocking member 48 visible at, the thrust member 46 being inscribed in a profile of the upper wall 20 while the blocking member 48 extends at least partly into a receiving housing 50 intended to receive the rod of the arm. A more detailed description of the receiving housing 50 will be given following the description of the locking device 42.

[0058] The pushing member 46, as illustrated in the, extends in alignment with the upper wall 20, the pushing member 46 being flush with the upper wall 20. The pushing member 46 is furthermore the member of the locking device 42 on which a user exerts a force to allow the locking device 42 to tilt about the tilting axis I.

[0059] The locking member 48 is the member of the locking device 42 configured to be at least partly in contact with the rod of the arm 2, longitudinally securing and / or detaching the adapter 14 relative to the arm 2. It is therefore understood that the locking member 48 interacts with the arm 2 to connect the adapter 14 with said arm 2.

[0060] As more particularly visible in the, the locking member 48 extends from the thrust member 46 towards the receiving housing 50, the locking member 48 comprising a bent portion 52 and a free end 54 arranged in the receiving housing 50 when the locking device 42 is in a position for locking the adapter 14 on the arm 2.

[0061] It is understood here that the bent portion 52 on the one hand comprises a first part extending from the thrust member 46 in a first plane and on the other hand a second part extending in a second plane intersecting the first plane towards the free end 54, the bent portion 52 comprising a connecting part connecting the first part to the second part. For example, the first plane is parallel to the longitudinal L and vertical V directions, the second plane extending parallel to the longitudinal L and transverse T directions.

[0062] The free end 54 takes the form of a shaft extending mainly along the longitudinal direction L.

[0063] The limiting means 44 is part of the locking member 48. More particularly, the limiting means 44 and the locking member 48 form a single-piece assembly, that is to say that the limiting means 44 and the locking member 48 cannot be separated from each other without causing the destruction of the limiting means 44 and / or the locking member 48. The limiting means 44 here extends the free end 54 longitudinally towards the receiving zone 32. In other words, the free end 54 comprises a projection extending the shaft forming the free end 54 longitudinally towards the receiving zone 32, the projection acting as the limiting means 44.

[0064] The locking device 42 further comprises at least one transverse wall 60. By transverse wall 60 of the locking device 42 is meant any wall which extends in a plane intersecting the longitudinal axis L of the adapter 14. More particularly, according to the example of the invention, the transverse wall 60 extends in a transverse direction T and in the vertical direction V and is part of the thrust member 46 or the blocking member 48 of the locking device 42.

[0065] According to the invention, the adapter 14 comprises a protrusion 62 which extends between the transverse wall 60 of the locking device 42 and an element of the rear portion 14b of the adapter 14. According to the example of the invention illustrated, the element of the rear portion 14b of the adapter 14 is a guide duct 64 forming part of the receiving housing 50, the guide duct 64 being intended to receive the arm by extending at least partly into the internal volume 28 of the adapter 14.

[0066] More particularly, the guide duct 64 comprises a first longitudinal end 66 through which the arm is intended to enter the guide duct 64 and a second longitudinal end 68 adjacent to the transverse wall 60 of the locking device 14. Thus, it is understood that the protrusion 62 is formed between the transverse wall 60 of the locking device 42 and the second longitudinal end 68 of the guide duct 64.

[0067] According to a first example of the invention visible in the, the protrusion 62 is made of a material with the transverse wall 60 of the locking device 42. More particularly, the transverse wall 60 of the locking device 42 is positioned on the locking member 48 of the latter, at the level of the rear portion 14b of the adapter 14. The protrusion 62 then comprises at least one contact face 70 which extends opposite at least in part the element of the rear portion 14b of the adapter 14, here the second longitudinal end 68 of the guide duct 64, a longitudinal distance D1 between the contact face 70 and said second longitudinal end 68 being between 0.1 mm and 1 mm, advantageously equal to 0.5 mm.

[0068] As visible in the, the guide duct 64 comprises at least one holding wall 72 of the arm 2 in a vertical direction V of the adapter 14, said holding wall 72 extending mainly in the transverse direction T and in the longitudinal direction L. The holding wall 72 forms a tooth whose free end, hereinafter called transverse flank 74, is intended to bear against the arm, so as to hold the latter in the guide duct 64 in both the transverse direction T and the vertical direction V.

[0069] The retaining wall 72 extends longitudinally in the guide duct 64 from the first longitudinal end 66 to the second longitudinal end 68. Thus, the protrusion 62, according to the example of the invention, extends in the longitudinal extension of the retaining wall 72 of the guide duct 64.

[0070] The protrusion 62 also has a complementary shape with the retaining wall 72 of the guide duct 64 in the longitudinal direction L of the adapter 14. More precisely, a transverse flank 74 of the retaining wall 72 of the guide duct 64 and a transverse edge 76 of the protrusion 62 are defined, said transverse flank 74 and the transverse edge 76 extending in a common plane, here a vertical plane V and longitudinal plane L.

[0071] In addition, a bearing surface 78 of the holding wall 72 is defined, intended to come into contact with the arm positioned in the guide duct 64, and a bearing face 80 of the protrusion 62 is defined, said bearing face 80 and the bearing surface 78 extending in a common plane, which here extends at least partly in the longitudinal direction L.

[0072] Advantage is taken of such a protrusion 62 in that it makes it possible to form a stop with respect to the locking device 42 when the wiper blade is mounted on the arm and this wiper blade is subjected to a centrifugal force which tends to eject it from the arm, said wiper blade then being driven in rotation and the pivoting of the locking device 42 relative to the rest of the adapter 14 being limited by the protrusion 62 which forms a stop between the blocking member 48 of the locking device 42 and the guide duct 64.

[0073] The adapter 14 also comprises at least one reinforcement 82, visible in the, which extends between the internal wall 30 and the upper wall 20. The reinforcement 82 notably comprises a wall extending mainly, for example, in a plane substantially perpendicular to the longitudinal direction L. The reinforcement 82 makes it possible to reinforce the structure of the adapter 14 and to optimize its rigidity. Furthermore, and as visible in the, the reinforcement 82 comprises an opening 84 participating in delimiting at least in part the receiving housing 50. It is understood that the opening 84 is intended to receive at least a portion of the rod of the arm. The reinforcement 82 extends in the front part of the adapter 14, opposite the guide duct 64 which extends in the rear part 14b of the adapter 14, relative to the plane P perpendicular to the longitudinal direction L and passing through a locking device 42.

[0074] Thus, and as illustrated more particularly in the, the opening 84 of the reinforcement 82 and the guide duct 64 are aligned along a direction parallel to the longitudinal direction L, the rod of the arm therefore extending along the longitudinal direction L through the guide duct 64 and the opening 84 of the reinforcement 82.

[0075] According to the invention, the receiving housing 50 of the arm rod is offset laterally relative to the receiving zone 32 of the connector, in the transverse direction T.

[0076] More specifically, the receiving area 32 is closer to the side wall 18 than the receiving housing 50. In other words, the receiving area 32 is disposed between the receiving housing 50 and the side wall 18.

[0077] Furthermore, according to a characteristic of the invention, at least one end of the rod takes a shape complementary to the receiving housing 50 of the adapter 14, the rod having a notch, not visible, cooperating with the locking device 42 to longitudinally block the position of the adapter 14 on the rod of the arm. It is understood that the free end 54 of the locking member 48 is arranged in the notch of the rod so as to longitudinally block the rod in the receiving housing 50.

[0078] It is understood that to dismantle the wiper blade relative to the arm, the locking device 42 is tilted around its tilting axis I until the limiting means 44 abuts against the internal wall 30. This tilting is nevertheless sufficient to release the adapter 14 relative to the arm, while limiting the risk of breakage of the locking device 42.

[0079] The present invention cannot, however, be limited to the means and configurations described and illustrated here and it also extends to any equivalent means and configuration as well as to any technically effective combination of such means.

Claims

Adapter (14) for attaching a wiper blade (4) to an arm (2) of a wiping system (1), the adapter (14) extending along a longitudinal direction (L), the adapter (14) being configured to be rotatably mounted on a connector (10) of the wiper blade (4) about an axis of rotation (R) transverse to the longitudinal direction (L), the adapter (14) comprising a locking device (42) intended to longitudinally block the adapter (14) relative to the arm (2), the adapter (14) comprising a front portion (14a) and a rear portion (14b) delimited from one another by a plane (P) perpendicular to the longitudinal direction (L) and passing through the locking device (42), the locking device (42) comprising at least one transverse wall (60) which extends transversely to the longitudinal axis (L) and which is arranged in the rear portion (14b) of the adapter (14),the locking device (42) being pivotally mounted around a tilting axis (I) parallel to the longitudinal direction (L), the adapter (14) being characterized in that it comprises a protrusion (62) which extends between the transverse wall (60) of the locking device (42) and an element of the rear portion (14b) of the adapter (14)., Adapter (14) according to the preceding claim, comprising at least one side wall (18) and one upper wall (20) participating in defining an internal volume (28) of the adapter (14), the adapter (14) comprising at least one guide duct (64) intended to receive the arm (2) and which extends at least partly into the internal volume (28) of the adapter (14). Adapter (14) according to the preceding claim, wherein the guide duct (64) comprises a first longitudinal end (66) through which the arm (2) is intended to enter the guide duct (64) and a second longitudinal end (68) adjacent to the transverse wall (60) of the locking device (42), the protrusion (62) being formed between the transverse wall (60) of the locking device (42) and the second longitudinal end (68) of the guide duct (64). An adapter (14) according to any preceding claim, wherein the protrusion (62) is integral with the transverse wall (60) of the locking device (42). An adapter (14) according to any one of claims 1 to 3, wherein the protrusion (62) is integral with the element of the rear portion (14b) of the adapter (14). Adapter (14) according to the preceding claim in combination with claim 3, wherein the protrusion (62) is made of a material with the second longitudinal end (68) of the guide duct (64) forming the element of the rear portion (14b) of the adapter (14). Adapter (14) according to any one of the preceding claims, in which the protrusion (62) comprises at least one contact face (70) which extends opposite at least in part the transverse wall (60) of the locking device (42) or the element of the rear portion (14b) of the adapter (14), a longitudinal distance between the contact face (70) and the transverse wall (60) or the element of the rear portion (14b) being between 0.1 mm and 1 mm. Adapter (14) according to any one of the preceding claims in combination with claim 2 or 3, wherein the guide duct (64) comprises at least one holding wall (72) of the arm (2) in a vertical direction (V) of the adapter (14), the protrusion (62) extending in the longitudinal extension of said holding wall (72). Adapter (14) according to the preceding claim, in which the protrusion (62) has a complementary shape with the retaining wall (72) of the guide duct (64), in the longitudinal direction (L) of the adapter. Adapter (14) according to any one of claims 8 or 9, wherein the retaining wall (72) of the guide duct (64) comprises a transverse flank (74), a transverse edge (76) of the protrusion (62) extending in a common plane with the transverse flank (74). Connection device (8) for a wiper blade (4) comprising at least one connector (10) and an adapter (14) according to any one of the preceding claims, the connector (10) being mounted for rotation about the axis of rotation (R) by means of a rotation device (16). Wiper blade (4) comprising at least one connection device (8) according to the preceding claim or an adapter (14) according to any one of claims 1 to 10. Wiping system (1) comprising at least one arm (2) and a wiper blade (4) according to the preceding claim, the arm (2) comprising at least one rod (6) housed in the guide duct of the adapter (14).

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