Patent Description:
Generally, a vehicle comprises a windshield in front of a driver, who can see, through the windshield, the road. The windshield must be transparent and clean to allow the driver to observe the front of the vehicle. Because of its position, the windshield is subject to weather conditions, cater and dirt cart come onto the window and obstruct the driver's vision. For that, the vehicle comprises a wiper system to wipe out of the window this water and dirt.

The wiper system traditionally consists of an arm extending between a first end attached to the vehicle and a second end to which a wiper blade is attached. The arm is connected to a shaft of a motor of the vehicle via its first end, or sometimes to an output shaft of a linkage, the arm moving back and forth around an axis of the motor or of the output shaft of the linkage to wipe the windshield.

The wiper system of known solution can be of the pantographic type, having two arms that are moving in a coordinated manner. The pantographic wiper system is adapted to hold long and/or heavy wiper blade, especially for heavy truck or bus. The pantographic wiper system generally comprises an adaptor which is the linking part between the two arms and the wiper blade. However, the known adapter of pantographic wiper system do not allow a translational assembly and/or disassembly, along a main direction of one of the arms, which is a drawback for some connections between the adapter and the wiper blade. <CIT> shows a similar connecting member.

In this context, the present invention is directed towards a connecting member of a wiper system of a pantographic type for cleaning a vehicle window, the connecting member is configured to receive an adaptor of the wiper system, the connecting member comprising at least a first connection body and a second connection body, the first connection body comprising a first pivot link configured to be attached to a first arm of the wiper system and the second connection body comprising a second pivot link configured to be attached to a second arm of the wiper system, the connecting member comprising a connecting device configured to allow a translational assembly of the adaptor, characterized in that the connecting device is located between the first pivot link of the first connection body and the second pivot link of the second connection body.

The connecting member is attached on the one hand to both arms and on the other hand to the adaptor of the wiper blade. In other words, the connecting member is a linking element between the wiper blade and the arms.

It is understood that the connecting device is flanked on both sides by the first connection body and the second connection body. In this configuration, the wiper blade is located between the arms of the wiper system. The location of the connecting device in relation to the connection bodies promotes the aerodynamism of the wiper system when the wiper blade is driven in motion by the arms to wipe a vehicle surface. Moreover, the shape taken by the connecting member is configured to allow a liquid connection between the wiper blade and the arms to supply cleaning liquid to a projection system installed on the wiper blade, for instance.

According to the invention, the connecting device presents a "U-shape" section with two lateral walls and an upper wall linked to the two lateral walls, the lateral walls and the upper wall defining at least in part a housing configured to house the adaptor. The "U-shape" section of the connecting device participates to guide the assembly of the adaptor inside the connecting member, and lock a motion of the adaptor at least along a direction substantially perpendicular to the lateral walls.

According to the invention, at least one of the two lateral walls comprises at least a bended claw located at its free end, the claw being bended towards the other lateral wall. It is understood by "claw" an extension of the lateral wall presenting a curvature towards the other lateral wall. The claw participates to guide the assembly of the adaptor inside the connecting member, and lock a motion of the adaptor at least along a direction substantially perpendicular to the upper wall.

According to another optional characteristic of the invention, both lateral walls comprise at least two bended claws located at their free ends, the claw being bended towards the other lateral wall.

According to another optional characteristic of the invention, the connecting member comprises a lock device configured to cooperate with the adaptor to lock the adaptor with the connecting member. The adaptor comprises a lock body cooperating with the lock device to lock the motion of the adaptor along a main extending direction of the connecting device.

According to another optional characteristic of the invention, the lock device comprises an opening located inside or through the upper wall of the connecting device. The lock body of the adaptor can be a clipping element configured to lock the motion of the adaptor along the main extending direction of the connecting device when the clipping element cooperates with the opening of the lock device.

According to another optional characteristic of the invention, the connecting member is symmetrical with respect to a symmetrical plan that extends in between a first rotational axis of the first pivot link and a second rotational axis of the second pivot link, the connecting device extending along a direction extending in the symmetrical plan and perpendicular to the rotational axis.

According to another optional characteristic of the invention, the first connection body and the second connection body are symmetrical to each other in relation of the symmetrical plan.

According to another optional characteristic of the invention, the first connection body comprises a first flat surface and the second connection body comprises a second flat surface, the first flat surface and the second flat surface extending in a common plan.

According to another optional characteristic of the invention, at least one of the pivot links comprises a shaft hole through at least one of the flat surfaces.

According to another optional characteristic of the invention, at least one of the pivot links comprises a circular hole through at least one of the flat surfaces.

According to another optional characteristic of the invention, at least one of the flat surfaces extends from a first longitudinal extremity of the upper wall to a second longitudinal extremity of the upper wall, a main extension plan of the flat surface being parallel to a main extension plan of the upper wall.

According to another optional characteristic of the invention, at least one of the flat surfaces is a bended portion of the corresponding lateral wall, this bended portion extending in plan parallel, or substantially parallel, to a main extension plan of the upper wall.

According to another optional characteristic of the invention, one of the connecting bodies comprises a flat surface extending from a first longitudinal end of the upper wall to a second longitudinal end of the upper wall, a main extension plan of the flat surface is parallel, or substantially parallel, to a main extension plan of the upper wall, the other connection body comprising a flat surface which is a bended portion of the corresponding lateral wall, this bended portion extending in plan parallel, or substantially parallel, to the main extension plan of the upper wall.

The invention relates to a wiper system of a pantographic type for cleaning a vehicle window, the wiper system comprising a first arm, a second arm and a wiper blade which comprises an adaptor, the wiper system comprising a connecting member as previously described, the first connection body being linked to the first arm via the first pivot link, the second connection body being linked to the second arm via the second pivot link, the adaptor being attached to the connecting device.

Other characteristics, details and advantages of the invention will become apparent on reading the following description, on the one hand, and several examples of realisation given as an indication and without limitation with reference to the schematic drawings annexed, on the other hand, on which:.

The characteristics, variants and different modes of realization of the invention may be associated with each other in various combinations, in so far as they are not incompatible or exclusive with each other. In particular, variants of the invention comprising only a selection of features subsequently described in from the other features described may be imagined, if this selection of features is enough to confer a technical advantage and/or to differentiate the invention from prior art.

In the following description, the designations "longitudinal", "traversal" and "vertical" refer to the orientation of a wiper system according to the invention. A longitudinal direction corresponds to a main direction of extension of a connecting device of a connection member of the wiper system, this longitudinal direction being parallel to a longitudinal axis L of a marker L, V, T shown in the figures. A transversal direction corresponds to a direction of main extension of an extension of a connection body of the connecting member of the wiper system, for example, this transversal direction being parallel to a transverse axis T of a marker L, V, T, and perpendicular to the longitudinal axis L. Finally, a vertical direction corresponds to a vertical axis V of a marker L, V, T, the vertical axis V being perpendicular to the longitudinal axis L and the transversal axis T.

<FIG> shows a vehicle <NUM> comprising at least a windshield <NUM> and a wiper system <NUM> configured to clean the windshield <NUM>. The wiper system <NUM> comprises at least an arm <NUM> and a wiper blade <NUM>, the arm <NUM> being linked at one of its ends to a shaft of a motor <NUM>, and at its other longitudinal end to the wiper blade <NUM> by a connecting member <NUM> which links the wiper blade <NUM> and the arm <NUM>. For instance, the motor <NUM> is configured to drive in motion the wiper system <NUM> around a rotational direction substantially parallel to a motor shaft, the arm <NUM> moving back and forth around this rotational direction to wipe the windshield <NUM>.

As illustrated on <FIG> or <FIG>, the wiper system <NUM> comprises a first arm 6a and a second arm 6b, both extend along a direction substantially parallel to the longitudinal axis L. According to this embodiment of the invention, the first arm 6a and the second arm 6b are similar, a description of a characteristic of one arm also applies to the other, the term "arm <NUM>" referring indifferently to the first arm 6a or the second arm 6b. However, the wiper system <NUM> can comprise two different arms 6a, 6b without going beyond the scope of the invention.

As shown in <FIG>, the wiper blade <NUM> is linked to the arm <NUM> by a connecting member <NUM> according to the invention. The arm <NUM> comprises a first longitudinal end <NUM> and a second longitudinal end <NUM>, the first longitudinal end <NUM> being configured to attach the arm <NUM> to the motor installed on the vehicle, or to an output shaft of a linkage, and the second longitudinal end <NUM> being configured to link the arm <NUM> to the connecting member <NUM>.

The arm <NUM> comprises a retainer device <NUM> at its first longitudinal end <NUM>, the retainer device <NUM> comprising, for instance, a cavity cooperating with the shaft of the motor or the output shaft of a linkage. At its second longitudinal end <NUM>, the arm <NUM> comprises a pivot body <NUM> which is linked to the connecting member <NUM> to allow a motion of the arm <NUM> around a rotational axis R1, R2 passing through its second longitudinal end <NUM>. Moreover, the arm <NUM> comprises a rod <NUM> extending along the longitudinal axis L between the retainer device <NUM> and the pivot body <NUM>.

It is understood that the arm <NUM> can rotate on the one hand around the rotational direction passing through the first longitudinal end <NUM>, and on the other hand around a rotational axis R1, R2 passing through the second longitudinal end <NUM>. Advantageously, this is the connecting member <NUM> which is driven around the rotational axes R1, R2 in relation to the arm <NUM>, the arm <NUM> being driven around the rotational direction passing through the first longitudinal end <NUM> in relation to the vehicle <NUM>.

The pivot body <NUM> of the arm <NUM> takes the shape of a shaft extending along the vertical axis V and passing through the second longitudinal end <NUM> of the arm <NUM>. To allow the motion of the pivot body <NUM> as well as the connection member <NUM>, the arm <NUM> comprises a shaft hole extending through the arm <NUM> along the vertical axis V, the pivot body <NUM> being installed at least in part in the shaft hole for instance. Advantageously, the shaft hole is a circular hole.

Description above in relation to the first arm 6a applies to the second arm 6b, in order to form a wiper system <NUM> of a pantographic type.

As shown on <FIG> or <FIG>, the connecting member <NUM> is configured to receive an adaptor <NUM> of the wiper system <NUM>. The adaptor <NUM> is attached to the wiper blade <NUM> and, once the adaptor <NUM> is assembled to the connecting member <NUM>, the wiper blade <NUM> is attached to the first and the second arms 6a, 6b. Indeed, the connecting member <NUM> is linked on the one hand to the adaptor <NUM> and to the other hand to both arms 6a, 6b with their respective pivot <NUM>. With the cooperation between the adaptor <NUM> and the connecting member <NUM>, the wiper blade <NUM> is attached to the arms 6a, 6b, and can be driven in motion by the arms 6a, 6b.

It is understood by "adaptor <NUM>" a set comprises at least an adaptor device and a connector cooperating with each other, the connector cooperating also with a support of the wiper blade <NUM>. Advantageously, the connecting member <NUM> cooperates with the adaptor device of the adaptor <NUM>.

According to the invention, the connecting member <NUM> comprises a first connection body <NUM> linked to the first arm 6a via a first pivot link <NUM>, and a second connection body <NUM> linked to the second arm 6b via a second pivot link <NUM>.

According to the invention, and as shown on the <FIG>, the connecting member <NUM> comprising at least the first connection body <NUM> and the second connection body <NUM>, the first connection body <NUM> comprising the first pivot link <NUM> attached to the first arm 6a of the wiper system <NUM>, the second connection body <NUM> comprising the second pivot link <NUM> attached to a second arm 6b of the wiper system <NUM>.

The connecting member <NUM> comprises a connecting device <NUM> configured to allow a translational assembly of the adaptor <NUM>, the connecting device <NUM> being located between the first pivot link <NUM> of the first connection body <NUM> and the second pivot link <NUM> of the second connection body <NUM>, along the transversal axis T. The connecting device <NUM>, according to the invention, is the element of the connecting member <NUM> that allows the attachment of the adaptor <NUM> to the connecting member <NUM>. In this configuration, the connecting device <NUM> is located between the first arm 6a and the second arm 6b, and more particularly, between the pivot body <NUM> of both arms 6a, 6b.

It is understood that each connection body <NUM>, <NUM> is configured to be attached at one of the first or the second arm 6a, 6b. For instance, and as illustrated on <FIG>, the first connection body <NUM> of the connecting member <NUM> is linked to the first arm 6a whereas the second connection body <NUM> of the connecting member <NUM> is linked to the second arm 6b. More particularly, the first pivot link <NUM> of the first connection body <NUM> cooperates with the pivot body <NUM> of the first arm 6a to link the connecting member <NUM> at the first arm 6a, the second pivot link <NUM> of the second connection body <NUM> cooperating with the pivot body <NUM> of the second arm 6b to link the connecting member <NUM> at the second arm 6b.

As illustrated in <FIG>, the connecting device <NUM> presents a "U-shape" section with two lateral walls <NUM> and an upper wall <NUM> linked to the two lateral walls <NUM>, the lateral walls <NUM> and the upper wall <NUM> defining at least in part a housing <NUM> configured to house the adaptor <NUM>. Both lateral walls <NUM> extending in a plan parallel, or substantially parallel, to the plan in which the other lateral wall <NUM> extends. In other words, both lateral walls <NUM> extend parallel, in a plan that comprises the longitudinal axis L and the vertical axis V.

The upper wall <NUM> extends in a plan advantageously perpendicular, or substantially perpendicular, to the plans in which extend both lateral walls <NUM>, the upper wall <NUM> extending parallel to the longitudinal axis L and to the transversal axis T. It is understood that each lateral wall <NUM> extends from the upper wall <NUM> along the vertical axis V in the same sense.

As mentioned above, the lateral walls <NUM> and the upper wall <NUM> participate to define the housing <NUM> of the adaptor <NUM>. The housing <NUM> is a cavity defined by the lateral walls <NUM> and upper wall <NUM> of the connecting device <NUM>, this cavity being adapted to house at least in part the adaptor <NUM> of the wiper blade <NUM>, as illustrated in <FIG>.

In this configuration, the connecting device <NUM> comprises an internal side <NUM> and an external side <NUM>, each wall of the connecting device <NUM> presenting this internal and external side <NUM>. The internal side <NUM> of one lateral wall <NUM> is in front of the internal side <NUM> of the other lateral wall <NUM>. It is in particularly the lateral side <NUM> of the walls <NUM>, <NUM> which defines the housing <NUM> of the adaptor <NUM>.

Moreover, and as shown on <FIG>, the connecting device <NUM> takes a "U-shape" section, observed in a cut view made in a plan perpendicular to the longitudinal axis L. Indeed, each lateral wall <NUM> represents one of the branches of the "U-shape" and the upper wall <NUM> represents the base of the "U-shape". The shape taken by the connecting device <NUM> allows a translational assembly of the adaptor <NUM>, the latest being assembled with a motion effected along the longitudinal axis L, this motion pushing the adaptor <NUM> inside the connecting device <NUM>, and more particularly, in the housing <NUM>.

As shown in <FIG>, the connecting member <NUM> comprises a symmetrical plan S extending between a first rotational axis R1 of the first pivot link <NUM> and a second rotational axis R2 of the second pivot link <NUM>. The connecting device <NUM> extends along a direction extending in the symmetrical plan S and perpendicular to the rotational axis R1 or R2. It is understood that the connecting device <NUM> presents two parts symmetrical to each other, the symmetrical plan S being parallel to the longitudinal axis L. For instance, one symmetrical part of the connecting member <NUM> comprises the first connection body <NUM>, one of the lateral walls <NUM> and a part of the upper wall <NUM>, the other symmetrical part comprising the second connection body <NUM>, the other lateral wall <NUM> and the other part of the upper wall <NUM>.

In this configuration, a characteristic described for one of the symmetrical parts of the connecting member <NUM> applies to the other part. In other words, a characteristic described in relation to the first connection body <NUM> can be applied to the second connection body <NUM>.

The pivot links <NUM>, <NUM> are configured to cooperate with the pivot body <NUM> of one of the arms 6a, 6b, said pivot body <NUM> cooperating more particularly with the shaft hole <NUM>. It is understood that the pivot body <NUM> of one of the arms 6a, 6b can take the shape of a shaft which is located at least in part in the shaft hole <NUM> of one of the connection bodies <NUM>, <NUM>. The pivot body <NUM> and the pivot link <NUM>, <NUM> allow the rotation of the arms 6a, 6b around a rotational axis R, each cooperation between a pivot body <NUM> and a pivot link <NUM>, <NUM> forming a rotational axis of an arm <NUM>. In this configuration, the pivot body <NUM> of the first arm 6a cooperates with the first pivot link <NUM> of the connecting member <NUM> to form the rotational axis R1, the first arm 6a being able to rotate around this rotational axis R1. Similarly, the pivot body <NUM> of the second arm 6b cooperated with the second pivot link <NUM> of the connecting member <NUM> to form the rotational axis R2, the second arm 6b being able to rotate around this rotational axis R2.

As illustrated in <FIG>, at least one of the two lateral walls <NUM> comprises at least a bended claw <NUM> located at its free end, the claw <NUM> being bended towards the other lateral wall <NUM>. It is understood by "claw" an extension of the lateral wall <NUM> presenting a curvature towards the other lateral wall <NUM>. The claw <NUM> participates at least in part to define the housing <NUM> of the adaptor <NUM>, to guide the motion of the adaptor <NUM> during the assembly of the adaptor <NUM>, and to lock the position of the adaptor <NUM> when the latest is inside the housing <NUM>.

Advantageously, the lateral wall <NUM> comprises two claws <NUM>, each claw <NUM> being located near a longitudinal end of the lateral wall <NUM>. Both claws <NUM> participate to define the housing <NUM> of the adaptor <NUM> and both claws <NUM> have the same shape.

In a preferred embodiment, both lateral walls <NUM> comprise two claws <NUM>, the claws <NUM> of one of the lateral wall <NUM> is symmetrical to the claws <NUM> of the other lateral wall <NUM>, in relation to the symmetrical plan S.

According to the invention, the connecting member <NUM> comprises a lock device <NUM> configured to cooperate with the adaptor <NUM> to lock the adaptor <NUM> with the connecting member <NUM>. The lock device <NUM> is configured to cooperate with a lock body located on the adaptor <NUM>. As shown in <FIG>, the lock device <NUM> comprises an opening located inside or through the upper wall <NUM> of the connecting device <NUM>. The opening takes the shape of a rectangular hole through the upper wall <NUM>, the rectangular hole being located at the same distance of each pivot link <NUM>, <NUM>.

The lock body of the adaptor <NUM> can comprise a clipping element which is configured to cooperate with the lock device <NUM> of the connecting member <NUM>.

Once the adaptor <NUM> is assembled inside the housing <NUM>, the clipping element is located in the opening of the lock device <NUM>, the cooperation between the opening and the clipping element blocking motion of the adaptor <NUM> along the longitudinal axis L. Moreover, the lateral walls <NUM> lock the position of the adaptor <NUM> located inside the housing <NUM> in relation to the transversal axis T and the upper wall <NUM> and the claws <NUM> lock the position of the adaptor <NUM> inside the housing <NUM> in relation to the vertical axis V.

As mentioned above, the first connection body <NUM> and the second connection body <NUM> are symmetrical to each other in relation of the symmetrical plan S. In this configuration, the first connection body <NUM> extends from the connecting device <NUM> as opposed to the second connection body <NUM>.

Moreover, a characteristic described for one of the connection bodies <NUM>, <NUM> applies for the other connection body <NUM>, <NUM>. In the flowing description, the term "connection body <NUM>, <NUM>" can refer indifferently to the first connection body <NUM> or to the second connection body <NUM>. However, a connecting member <NUM> that comprises a first connection body <NUM> different from a second connection body <NUM> may enter the scope of the invention.

As shown in <FIG>, the first connection body <NUM> comprises a first flat surface <NUM> and the second connection body <NUM> comprises a second flat surface <NUM>, the first flat surface <NUM> and the second flat surface <NUM> extending in a common plan. In other words, each connection body <NUM>, <NUM> is like an extension of the connecting device <NUM> extending in a main extending plan. More particularly, the connection bodies <NUM>, <NUM> extend from a linking line between the upper wall <NUM> and one of the lateral walls <NUM> of the connecting device <NUM>, in opposition to each other.

Each connection body <NUM>, <NUM> comprises a demarcation area <NUM> between its flat surface <NUM>, <NUM> and the upper wall <NUM> of the connecting device <NUM>. As illustrated in <FIG> and <FIG>, the demarcation area <NUM> takes the shape of a groove extending noticeably along the longitudinal axis L.

It is understood that the main extending plan of the first connection body <NUM> is coplanar with the main extending plan of the second connection body <NUM>. According to the embodiment illustrated on <FIG>, the first connection body <NUM> and the second connection body <NUM> extend in a plan that includes the longitudinal axis L and the transversal axis T.

Moreover, the connection bodies <NUM>, <NUM> extend in a plan noticeably parallel to the main extending plan of the upper wall <NUM> of the connecting device <NUM>. Advantageously, the plan in which the connection bodies <NUM>, <NUM> extend and the plan in which the upper wall <NUM> of the connecting device <NUM> extends may be coplanar.

Moreover, at least one of the flat surfaces <NUM>, <NUM> extends from a first longitudinal extremity <NUM> of the upper wall <NUM> to a second longitudinal extremity <NUM> of the upper wall <NUM>, a main extension plan of the flat surface being parallel to a main extension plan of the upper wall <NUM>. In other words, a longitudinal end of one of the connection bodies <NUM>, <NUM> comes close to the longitudinal end of the upper wall <NUM>, and advantageously, both longitudinal ends of the connection bodies <NUM>, <NUM> come close to the longitudinal ends of the upper wall <NUM>.

The connection bodies <NUM>, <NUM> each comprise a contact side <NUM> with the connecting device <NUM>. The longest dimension of the contact side <NUM> of each connection body <NUM>, <NUM> measured along the longitudinal axis L is noticeably similar of a longitudinal dimension of the connecting device <NUM> measured between the first longitudinal extremity <NUM> and the second longitudinal extremity <NUM>. In this embodiment, the demarcation areas <NUM> present the same dimension than the longest dimension of the contact sides <NUM> of the connection bodies <NUM>, <NUM> measured along the longitudinal axis L and the longitudinal dimension of the connecting device <NUM>.

At least one of the pivot links <NUM>, <NUM> comprises a shaft hole <NUM> made through at least one of the flat surfaces. As shown in <FIG>, the flat surface <NUM>, <NUM> of each connection body <NUM>, <NUM> comprises the shaft hole <NUM>, the shaft holes <NUM> of the connection bodies <NUM>, <NUM> being symmetrical in relation to the symmetrical plan S.

<FIG> shows a second embodiment of the connection bodies <NUM>, <NUM>, compared to the first embodiment as described on <FIG>. In the description of this second embodiment, references of the first embodiment may be used when they concern same objects.

According to this second embodiment of the invention, at least one of the flat surfaces <NUM>, <NUM> is a bent portion <NUM> of the corresponding lateral wall <NUM>. This bent portion <NUM> extends in plan parallel to a main extension plan of the upper wall <NUM>. It is understood that at least one of the flat surfaces <NUM>, <NUM> consists of a portion of one of the lateral walls <NUM>, the said portion of the lateral wall <NUM> being bent or crooked as part of the manufacturing of the connecting member <NUM>.

Advantageously, each flat surface <NUM>, <NUM> is a bent portion <NUM> of the corresponding lateral wall <NUM>.

In this second embodiment, the demarcated areas <NUM> correspond to the area where the bent portion <NUM> of the lateral wall <NUM> is realized.

More particularly, the flat surface <NUM>, <NUM> is delimited longitudinally by two grooves <NUM> through the lateral wall <NUM>, the two grooves <NUM> extending from a free end of the lateral wall <NUM> to the demarcated area <NUM> along the vertical axis V. In this particular embodiment, each claw <NUM> is located between one of the grooves <NUM> and one of the longitudinal ends of the lateral wall <NUM>.

Claim 1:
A connecting member (<NUM>) of a wiper system (<NUM>) of a pantographic type for cleaning a vehicle (<NUM>) window, the connecting member (<NUM>) is configured to receive an adaptor (<NUM>) of the wiper system (<NUM>), the adaptor (<NUM>) being a set comprising at least an adaptor device and a connector cooperating with each other, the connector cooperating also with a support of a wiper blade (<NUM>), the connecting member (<NUM>) comprising at least a first connection body (<NUM>) and a second connection body (<NUM>), the first connection body (<NUM>) comprising a first pivot link (<NUM>) configured to be attached to a first arm (6a) of the wiper system (<NUM>) and the second connection body (<NUM>) comprising a second pivot link (<NUM>) configured to be attached to a second arm (6b) of the wiper system (<NUM>), the connecting member (<NUM>) comprising a connecting device (<NUM>) configured to allow a translational assembly of the adaptor (<NUM>) along a main direction of one of the arms, the connecting device (<NUM>) being located between the first pivot link (<NUM>) of the first connection body (<NUM>) and the second pivot link (<NUM>) of the second connection body (<NUM>), characterized in that the connecting device (<NUM>) presents a "U-shape" section with two lateral walls (<NUM>) and an upper wall (<NUM>) linked to the two lateral walls (<NUM>), the lateral walls (<NUM>) and the upper wall (<NUM>) defining at least in part a housing (<NUM>) configured to house the adaptor (<NUM>) and in that at least one of the two lateral walls (<NUM>) comprises at least a bended claw (<NUM>) located at its free end, the claw (<NUM>) being bended towards the other lateral wall (<NUM>).