阅读说明：本技术 用于约束形成于车身零件的壁中的开口的阻闭活门的约束装置 (Restraint device for restraining a blocking flap of an opening formed in a wall of a vehicle body part ) 是由 让-佛朗索瓦·普拉斯 于 2019-10-04 设计创作，主要内容包括：本发明涉及一种用于约束形成于车身零件的壁中的开口的阻闭活门的约束装置,所述约束装置包括：-存在于所述壁上的容置部,所述容置部设有由至少一个壁限定的缝；和-适于与所述容置部协作的用于所述阻闭活门的系带的附接元件(60),所述附接元件(60)包括适于插入所述容置部中的插入端部(70)。所述插入端部(70)包括由至少两个相对的壁(71、72)限定的中央区域(70C),所述中央区域(70C)设有至少一个起伏部(92)或通过至少一个起伏部(92)延长,以使得在将所述插入端部(70)插入所述缝中时,所述起伏部(92)的经过引起限定所述缝的壁或所述插入端部(70)的可逆变形,以将所述插入端部约束在所述缝中。(The present invention relates to a restraining device for restraining a blocking shutter of an opening formed in a wall of a vehicle body part, the restraining device comprising: -a receptacle present on the wall, provided with a slit defined by at least one wall; and-an attachment element (60) for the lace of the trap door adapted to cooperate with the housing, the attachment element (60) comprising an insertion end (70) adapted to be inserted into the housing. The insertion end (70) comprises a central region (70C) defined by at least two opposite walls (71, 72), the central region (70C) being provided with at least one relief (92) or being elongated by at least one relief (92), so that upon insertion of the insertion end (70) into the slit, the passage of the relief (92) causes a reversible deformation of the walls defining the slit or of the insertion end (70) to constrain the insertion end in the slit.)

1. A restraining device (55) for restraining a blocking shutter (40) of an opening (20) formed in a wall (30) of a vehicle body part (10), the restraining device (55) comprising:

-a housing (35) present on the wall (30), the housing (35) being provided with a slit defined by at least one wall; and

-an attachment element (60) for the flap lace (50) adapted to cooperate with the housing (35), said attachment element (60) comprising an insertion end adapted to be inserted into the housing (35),

characterized in that said insertion end (70) comprises a central region (70C) defined by at least two opposite walls (71, 72), said central region (70C) being provided with or prolonged by at least one relief (90, 91, 92, 120), so that upon insertion of said insertion end (70) into said slot, the passage of said relief (90, 91, 92, 120) causes a reversible deformation of at least one wall (100) defining said slot (36) or of said insertion end (70) to constrain said insertion end (70) in said slot (35).

2. The restraining device (55) of claim 1, wherein the deformation occurs in a direction of a minor dimension of the slot (36), the dimension of the insertion end (70) at the undulations (90, 91, 92, 120) being greater than the minor dimension of the slot (36).

3. The restraining device (55) of claim 1 or 2, wherein the attachment element comprises a substantially elongated and straight body (65), the insertion end (70) being substantially contoured to form a V-shape.

4. The restraining device (55) of any one of the preceding claims, wherein the attachment element (60) has a substantially flat shape comprising a main body (65) including an end (80) of the attachment element opposite the insertion end (70), the insertion end (70) forming an extension of the main body (65), the main body (65) having an elongated shape, preferably substantially rectangular.

5. The restraining device (55) of claims 3 and 4, wherein the insertion end (70) is connected to the body at the ends of the arms of the V by flexible tabs (110).

6. A restraining device (55) according to claim 4 or 5, wherein the body (65) is provided with a grip portion (115) locally increasing its width, the contour of said grip portion preferably being substantially circular.

7. The restraining device (55) of any one of the preceding claims, wherein the undulation (90) is formed by an extension of the central region (70C), the extension of the central region (70C) forming an edge bend (120) of the central region (70C).

8. The restraining device (55) of any one of claims 1-6, wherein the undulations are protrusions (90, 91, 92, 93) that locally vary the thickness of the insertion end (70).

9. The restraining device (55) of claim 8, wherein the protrusion is a boss (90, 91, 92).

10. The restraining device (55) of claim 8 or 9, wherein the protrusion (90) comprises a first substantially flat wall (93A) extending from the central region (70C) in a direction opposite the insertion end (70) and forming a first angle with the central region (70C), and a second wall extending from the central region (70C) towards the insertion end (70) and forming a second angle with the central region (70C), the first and second walls (93A, 93B) joining to form an apex (93) of the protrusion, the first angle preferably having a value less than the second angle.

11. The restraining device (55) of claims 4 and 8, wherein the protrusion (90, 91, 92) is arranged at a junction (85) between the body (65) and the insertion end (70).

12. The restraining device (55) of any one of claims 8-11, wherein the attachment element extends substantially along a plane, the insertion end of the attachment element comprising two opposite walls, each wall being provided with at least one protrusion, the protrusions of each wall being arranged on these walls symmetrically with respect to the plane along which the attachment element extends.

13. The restraining device (55) of any one of claims 8-12, wherein the attachment element (60) extends substantially along a plane, the insertion end (70) of the attachment element (60) comprising two opposite first (71) and second (72) walls, the first wall (71) being provided with at least one first protrusion (91) and the second wall (72) being provided with at least two second protrusions (92), the orthogonal projection of the at least one first protrusion (91) of the first wall (71) onto the plane along which the attachment element (60) extends not coinciding with the orthogonal projection of the at least two second protrusions (92) onto the plane.

14. The restraining device (55) of any one of the preceding claims, wherein the attachment element (60) comprises an end portion (80) opposite the insertion end portion (70), the attachment element (60) comprising an axis of symmetry passing through both end portions (70, 80).

15. The restraining device (55) of claims 8, 13 and 14, wherein the second protrusion (92) is arranged on the second wall (72) on both sides of the axis of symmetry and the first protrusion (71) is arranged on the axis of symmetry.

16. The restraining device of any one of the preceding claims, wherein the attachment element (60) and/or the wall (100) defining the slit (36) are made of a material selected from the following materials, alone or in combination: polypropylene (PP), Polycarbonate (PC), polybutylene terephthalate (PBT) and Acrylonitrile Butadiene Styrene (ABS).

17. A trap (40) for an opening (20) formed in a wall (30) of a vehicle body element (10), characterized in that it comprises a restraining device (55) according to any one of the preceding claims.

Technical Field

The invention relates to the field of motor vehicle body parts comprising an opening that can be blocked by a flap.

In particular, the present invention relates to a device for attaching a shutter to a part when the shutter is not in a position blocking an opening.

Background

Such a body part is intended to be arranged, for example, to face a beam of a front or rear bumper of a motor vehicle. In particular, motor vehicles are known which comprise a trailer ring fixed to a front bumper beam, the body part or the bumper skin being arranged in front of the trailer ring. Thus, openings are made in the body part to provide access to the trailer ring when required (e.g. in order to tow a motor vehicle after a malfunction of the motor vehicle). Furthermore, the trailer ring is often used to restrain the vehicle during the delivery (truck, ship, etc.) phase.

The opening of the body component is closed by a flap for aesthetic purposes. Conventionally, in the blocking position, the flap is constrained to the bodywork part by at least one snap-on pin, so as to be sufficient to maintain the flap in the opening.

When the shutter is no longer in the blocking position, it is no longer attached to the part. There is a risk that this element is lost.

In order to avoid losing the flap, it is known to equip the flap with a tether. The belt is connected on the one hand to the flap and on the other hand to the wall of the body component on the side of the component that is not visible. The fixing is achieved by means of an attachment element (or anchor) arranged at the end of the strap opposite the shutter, which is housed in the housing of the wall.

However, it is sometimes necessary to completely remove the flaps from the walls, for example to tie the vehicle to a truck or boat. In this case, the attachment element must be easy to install and difficult to disassemble in order to avoid any unintentional removal without thereby damaging the element upon removal.

The ease and repeatability of these mounting/dismounting operations of the attachment element in the housing is limited by the geometry of the attachment element.

There are a variety of attachment element geometries on the market. However, none is satisfactory for both installation and removal. In fact, the known attachment elements are either not removable (they must be damaged, broken), or too easy to remove with the risk of losing the shutter, or too difficult to install for the plant operator.

In the conventional geometry of this type of non-loss anchor, it is possible to exemplify anchors which branch off a "diamond" anchor which tends to separate and bear with force when assembling the anchor and anchors which branch off a "simple V" or "fir tree/arrow" (ends of the V are not connected) which tend to separate when disassembling the non-loss anchor.

From document FR1663132 is also known an attachment element for a tether of a shutter for an opening formed in a wall of a vehicle body part, the attachment element comprising an insertion end for insertion into a housing and an end opposite the insertion end, the attachment element comprising:

-at least two assembly arms connected by one of their ends at an insertion end and forming substantially a V-shape;

at least two mutually parallel arms connected at the end opposite the attachment element and adapted to approach each other when inserting the attachment element into the housing.

This solution allows improving the assembly/disassembly compromise of the attachment element of the shutter with respect to the wall, so that the assembly is easy for the operator, while the disassembly, although difficult, does not therefore damage the attachment element. In practice, a force between 10N and 30N allows installation and a force between 20 and 60N allows removal, so that the removal force is about 2 times the assembly force. The trap door can thus be installed and removed several times, since the attachment element is not damaged during removal.

However, despite the improvements provided by FR1663132, the attachment element of this document has the drawback of being relatively bulky and not adaptable to all shutter environments due to its specific geometry.

Disclosure of Invention

The object of the present invention is to remedy the drawbacks of the prior art by providing an attachment system which allows to improve the mounting/dismounting compromise of the shutter with respect to the wall, so that the mounting is easy for the operator, whereas the dismounting, although difficult, does not therefore damage the attachment element, and which is sufficiently compact.

To this end, the invention relates to a restraining device for restraining a blocking shutter forming an opening in a wall of a vehicle body part, comprising:

-a receptacle present on the wall, provided with a slit defined by at least one wall; and

an attachment element for the lace of the blocking shutter adapted to cooperate with the housing, said attachment element comprising an insertion end adapted to be inserted into the housing,

characterized in that the insertion end comprises a central region defined by at least two opposite walls, the central region being provided with or extended by at least one undulation, so that, upon insertion of the insertion end into the slot, the passage of the undulation causes a reversible deformation of at least one wall defining the slot or of the insertion end, so as to constrain the insertion end in the slot.

The relief thus constitutes a point of effort (point dur) that prevents the end of the attachment element from backing out once it has entered the slot (unless a large extraction force is reapplied in the direction opposite to the insertion).

Since the insertion end is either provided with or extended by an undulation, and the entry of this undulation into the housing causes a reversible deformation of the walls defining the slot or of the insertion end to constrain the insertion end in the housing, it is no longer necessary for the attachment element to comprise two pairs of arms consecutive in the length direction thereof. Thereby, the attachment element may have a smaller size, i.e. be more compact. In particular, the length of the attachment element can be reduced to one third.

The attachment element can thereby be adapted to a multitude of different environments with various sizes and shapes of shutters. This is particularly useful for avoiding certain obstacles such as impact absorbing means located near the flap.

In order to allow a further reduction of the size of the attachment element, said deformation takes place in the direction of the small dimension of said slot, the dimension of said insertion end at said relief being greater than said small dimension of said slot.

Still to facilitate insertion and withdrawal of the projection in the slot, the attachment element comprises a generally elongate and straight body, the insertion end being generally contoured to form a V-shape.

In order to facilitate the handling of the attachment element by the user, the attachment element has a substantially flat shape comprising a body comprising the end of the attachment element opposite the insertion end forming an extension of the body, the body having an elongated shape, preferably substantially rectangular.

According to one embodiment of the invention, the insertion end is connected to the body at the end of the arms of the V by flexible tabs (voiles flexures).

The presence of these tabs allows to guide the attachment element as it is withdrawn from the housing and to participate in the centering of the insertion end in the slit.

The thickness of these tabs is preferably less than the thickness of the remainder of the insertion end to facilitate twisting of the insertion end in the event that it is deformed when it is inserted into the slot.

To further facilitate gripping of the attachment element, the body may be provided with a grip portion locally increasing its width, the profile of the grip portion preferably being substantially circular.

According to an embodiment of the present invention, the undulation is formed by an extension of the central region, the extension of the central region forming an edge bend (recoursement) of the central region.

According to an embodiment of the invention, the relief is a protrusion locally varying the thickness of the insertion end.

To facilitate insertion and withdrawal of the projection in the slot, according to one embodiment of the invention, the projection is a boss.

According to another embodiment of the invention, the projection comprises a first substantially flat wall extending from the central region at a first angle to the central region in a direction opposite to the insertion end and a second wall extending from the central region towards the insertion end at a second angle to the central region, the first and second walls joining to form an apex of the projection, the first angle preferably having a smaller value than the second angle.

This particular convex shape with a large inclination facing the holding end of the attachment element and a small inclination facing the insertion end allows to constitute a force point which still requires a greater force in order to withdraw it from the slit.

According to another further embodiment of the invention, the protrusion is a rib protruding from a wall of the insertion end.

Preferably, the protrusion is disposed at a junction between the body and the insertion end.

The projection is advantageously arranged at the joint so as not to interfere with the insertion of the insertion end into the slot. The operator can understand that the insertion is properly achieved when the protrusion comes into contact with the slot.

According to a particular embodiment of the invention, the attachment element extends substantially along a plane, the insertion end of the attachment element comprising two opposite walls, each wall being provided with at least one projection, the projections of each wall being arranged on these walls symmetrically with respect to the plane along which the attachment element extends.

This embodiment is particularly suitable for the following versions of the invention: according to this alternative, the walls of the slot are deformed by the action of the projections entering into the slot.

According to another embodiment of the invention, the attachment element extends substantially along a plane, the insertion end of the attachment element comprising two opposite first and second walls, the first wall being provided with at least one first protrusion and the second wall being provided with at least two second protrusions, the orthogonal projection of the at least one first protrusion of the first wall onto the plane along which the attachment element extends not coinciding with the orthogonal projection of the at least two second protrusions onto the plane.

This embodiment is particularly suitable for the following versions of the invention: according to this alternative, the insertion end is deformed by the effect of the entry of the projection into the slot. In fact, by virtue of the particular positioning of the projection, it is the insertion end that is deformed under the effect of a torsional force about an axis orthogonal to the plane of the slot when it is inserted into the slot.

Preferably, the attachment element comprises an end opposite the insertion end, the attachment element comprising an axis of symmetry passing through both ends. This allows limiting the stress in the direction of insertion of the insertion end into the slit.

In order to facilitate reversible deformation of the insertion end, the second protrusion is arranged on the second wall on both sides of the axis of symmetry, and the first protrusion is arranged on the axis of symmetry.

The attachment element and/or the wall defining the slit are preferably composed of a material selected from the following materials, alone or in combination: polypropylene (PP), Polycarbonate (PC), polybutylene terephthalate (PBT) and Acrylonitrile Butadiene Styrene (ABS).

These materials are in fact well suited to obtain a reversible deformation of the attachment element and/or of the wall.

The invention also relates to a blocking flap for an opening formed in a wall of a vehicle body part, comprising a restraint device according to the invention.

The invention also relates to a motor vehicle comprising a body part provided with a blocking flap according to the invention.

Drawings

The invention will be better understood by reading the attached drawings, in no way limiting, provided as an example, wherein:

FIG. 1 is a schematic perspective view of a body part comprising an opening formed in a wall of the part and a blocking flap comprising a restraining device according to an embodiment of the invention;

figure 2 is a schematic perspective view of the shutter of figure 1 provided with a tie;

figure 3 is a perspective view of an attachment element of the strap of figure 1;

figure 4 is a front view of the attachment element of figure 3;

FIG. 5A is a cross-sectional view of the element along the section line A-A indicated in FIG. 4;

fig. 5B is a view similar to fig. 5A of an attachment element according to a second embodiment of the invention;

fig. 6 is a perspective view of a housing provided with a wall of the body part of fig. 1 and of the attachment element of fig. 3 inserted in the housing;

figure 7 is a cross-sectional view of figure 6 along the plane VII-VII;

figure 8 is a cross-sectional view, along the section line G-G, of the housing of figure 7 in the first configuration;

figure 9 is a view similar to figure 8, with the housing in a second configuration in which one of the walls defining the slit is deformed;

FIG. 10 is a partial cross-sectional view of the receptacle of FIG. 7 along the section line H;

figure 11A is a perspective view of an attachment element of a restraining device according to a second embodiment of the invention;

FIG. 11B is a view similar to FIG. 11A along another perspective;

figure 12 is a front view of the attachment element of figure 3;

figure 13 is a cross-sectional view of the attachment element along the section line B-B indicated in figure 12;

figure 14 is a perspective view of the housing provided by the wall of the body part of figure 1 and of the attachment element of figure 11A inserted in the housing;

FIG. 15 is a cross-sectional view of FIG. 14 along the plane XIII-V-XIII;

FIG. 16 is a cross-sectional view, along the section line D-D, of the receptacle of FIG. 15 in the first configuration;

fig. 17 is a view similar to fig. 16, with the housing in the second configuration of deformation of the insertion end;

FIG. 18 is a partial cross-sectional view of the receptacle of FIG. 15 along section line E;

figure 19 is a view similar to figure 3 of an attachment element of a strap according to a third embodiment of the invention;

figure 20 is a view similar to figure 4 of an attachment element of a strap according to a third embodiment of the invention;

figure 21 is a view similar to figure 5 of an attachment element of a strap according to a third embodiment of the invention;

figure 22 is a cross-sectional view of the attachment element along the section line D-D indicated in figure 20.

Detailed Description

Fig. 1 shows a body part 10 comprising an opening 20 formed in a wall 30 of the body part 10 and a blocking flap 40 of the opening 20.

Figure 2 shows in detail the blocking shutter 40 comprising a lace 50 which allows to maintain the shutter 40 attached to the piece 10 even when the shutter 40 no longer blocks the opening 20.

The wall 30 and the shutter 40 are provided with restraining means 55 for restraining the shutter 40 on the wall 30. The constraint means 55 comprise a housing 35 present on the wall 30, the shutter 40 being provided with a strap 50 comprising an attachment element 60 adapted to cooperate with the housing 35 to connect the strap 50 to the wall 30.

Reference is now made to figures 3 to 5 which show in detail an example of an attachment element 60 according to a first embodiment of the present invention.

The attachment element 60 has an elongated shape extending substantially along a plane. The attachment element comprises, in particular, a substantially elongated and straight body 65 and an insertion end 70 intended to be inserted in the housing 35 (here in the slot 36 of the housing 35, as will be seen hereinafter). The main body 65 has an elongated shape, the outline of which is substantially rectangular. The end 70 forms an extension of the body 65, preferably made integrally with the body 65. The end 70 includes a central region 70C defined by at least two opposing walls 71, 72, the at least two opposing walls 71, 72 being substantially flat and parallel to each other.

The attachment element 60 includes a gripping end 80 opposite the insertion end, here the end of the body 65 opposite the insertion end 70. The user will hold the attachment element 60 by the holding end 80.

The attachment element 60 comprises an axis of symmetry passing through both ends. The axis of symmetry is shown here in dashed lines in fig. 4. The attachment element 60 has an axis of symmetry passing through both its ends, which allows to limit the stresses in the direction of insertion of the insertion end 70 in the slot.

The insertion end 70 is also substantially flat and has a V-shaped profile. In the embodiment of the invention shown in fig. 3 to 5, the V-shape is a somewhat rounded circle.

The joint 85 between the insertion end 70 and the body 65 has a substantially circular shape, so that the whole formed by the insertion end 70 and the joint 85 has a pear-shaped profile.

The insertion end 70 is provided with at least one undulation 90 that locally varies the thickness of the insertion end 70, so that, when the insertion end 70 is inserted into the slit 36 of the housing 36, the passage of the undulation 90 causes a reversible deformation of the wall or of the insertion end, thus constraining the insertion end in the slit 36 as described below.

In the embodiment shown in fig. 1-18, the one or more undulations 90 are protrusions.

Preferably, the protrusion 90 is disposed at the junction 85 between the body 65 and the insertion end 70. This advantageously allows for unimpeded insertion of the insertion end 70 into the slot. The operator will understand that this insertion is properly accomplished when the protrusions 90 come into contact with the slot.

To facilitate insertion and withdrawal of the boss 90 in the slot 36, the boss is a boss, i.e., the boss is a hemisphere protruding from the insertion end 70. A boss 90 projects from the flat wall 71 of the insertion end 70, with which it is preferably made integrally. However, according to other embodiments not shown, the protrusion 90 may also be a rib protruding from one of the walls of the insertion end.

As can be seen in fig. 5, the insertion end 70 of the attachment element comprises two opposite walls 71, 72, each provided with at least one projection 90, the projections of each wall 71, 72 being arranged on these walls symmetrically with respect to the plane along which the attachment element 60 extends. This symmetry has the advantage when inserting the attachment element 60, which thus has no mounting direction.

However, it is also contemplated that there may be only one protrusion on only one of the opposing walls 71, 72 of the insertion end 70, or that each of the opposing walls 71, 72 of the insertion end 70 be symmetrically located on these walls relative to the plane along which the attachment element 60 extends.

According to a second embodiment of the invention illustrated in fig. 5B, the projection 90 comprises a substantially flat first wall 93A extending from the central region 70C in a direction opposite to the insertion end 70 and forming a first angle with the central region 70C, and a second wall extending from the central region 70C towards the insertion end 70 and forming a second angle with the central region 70C. The first wall 93A and the second wall 93B join to form an apex 93 of the protrusion. Here, the value of the first angle is smaller than the value of the second angle.

This particular shape of the projection 90 with a large inclination facing the grip end 80 and a small inclination facing the insertion end 70 allows to constitute a hard point which requires a greater force also in order to withdraw it from the slot.

The interaction between the receptacle 35 and the attachment element 60 will now be described with reference to fig. 6 to 10.

In fig. 7, an example of the accommodation portion 35 is shown, and the wall 30 defining the opening 20 closed by the restraint device 10 according to the first embodiment of the present invention is provided with the accommodation portion 35.

The housing 35 comprises a slit 36 having a substantially rectangular cross section and thus defined by four walls parallel two by two. In other embodiments of the invention, the slot may have an elliptical cross-section.

The slot extends generally along two dimensions, one of which is several times larger than the other. Here, the large dimension of the slot extends in a vertical direction and the small dimension extends in a horizontal direction with respect to the ground on which the vehicle is driven. However, the opposite case may be considered.

The attachment element 60 is dimensioned such that the insertion end 70 can be inserted into the slit, as shown in fig. 7.

For this purpose, the thickness of the insertion end, i.e. here the spacing between the two opposing walls 71, 72 of the insertion end 70, is set to correspond approximately to the spacing between the walls defining the slit, preferably along its smallest dimension, with a slight clearance.

The protrusion 90 is manufactured such that the thickness of the insertion end 70 at the protrusion 90 is greater than the small dimension of the slot. This is shown in particular in fig. 8 and 10.

Upon insertion of the insertion end 70 into the slot 36, the passage of the protrusion 90 causes reversible deformation of one of the walls 100 of the slot 36 to restrain the insertion end within the slot 36, which is shown in fig. 9. In the example shown in the figures, the deformation takes place in the direction of the small dimension of the slot 36, in order to allow a further reduction of the size of the attachment element.

The projection 90 is configured to form a force-consuming point in the direction of removal of the attachment element 60. The projection allows to avoid that the forces to be exerted in the direction of removal and in the upward direction cause the attachment element 60 to be pulled out directly from the housing 35 (as is the case in particular with attachment elements having a diamond shape).

Thus, removal is difficult, but not so much that the attachment element 60 must be damaged in order to remove the strap 50. The removal force is so great and there is a point of effort that the operator must peak a greater force than the installation in order to remove the flap 40 from the wall 30.

By means of this configuration, mounting and dismounting can be repeated, so that the attachment element 60 and/or the accommodation portion 35 need not be damaged when dismounting the attachment element 60 from the accommodation portion 35.

Therefore, the attachment element 60 can have a small size because the force point is not constituted by an element extending in the length direction of the attachment element 60 but by a thickened portion of the insertion end.

According to the second embodiment of the invention shown in fig. 11A to 18, what is deformed when inserting the attachment element 60 into the slit 36 is no longer one of the walls 100 defining the slit 36, but the insertion end 70 of the attachment element 60.

In this second embodiment, the insertion end 70 also has a substantially flat shape, comprising two opposite first walls 71 and second walls 72, and is provided with at least one protrusion 90 locally varying its thickness.

However, unlike the embodiment shown in fig. 1 to 10, the opposite first wall 71 of the insertion end 70 is provided with at least one first projection 91 and the opposite second wall 72 is provided with at least two projections 92. The orthogonal projection of the first projection 91 of the first wall 71 on the plane along which the attachment element 60 extends does not coincide with the orthogonal projection of the two second projections 92 on this plane.

Due to this particular positioning of the boss 90, it is the insertion end 70 that is deformed under the effect of torsional forces about an axis normal to the plane of the slot when the insertion end 70 is inserted into the slot 36. This can be seen in particular in fig. 16 and 17.

Preferably, to facilitate the twisting of the insertion end 70, the second projections 92 are arranged on the second wall 72 on both sides of the axis of symmetry, and the first projections 91 are arranged on the first wall 71 on the axis of symmetry of the attachment element 60.

Furthermore, in this second embodiment, the attachment element 60 here also comprises a substantially elongated and straight body which is prolonged by an insertion end 70 which is contoured substantially in a V-shape.

However, unlike the embodiment of figures 1 to 7, the insertion end 70 is connected to the body at the end 105 of the arms of the V by a flexible tab 110. The presence of these tabs 110 allows to guide the attachment element 60 when withdrawing the attachment element 60 from the housing and to participate in the centering of the insertion end in the slot 60.

The thickness of the sheet 110 is preferably less than the thickness of the remainder of the insertion end (the thickness being calculated between the first and second walls 71, 72), thereby facilitating twisting of the insertion end 70.

To further facilitate gripping of the attachment element, the body 65 is provided with a grip portion 115, the grip portion 115 being generally circular in outline. The grip portion 115 thereby locally increases the width of the main body 65. The grip portion 115 is located on the side of the end 80 opposite the insertion end 70 (i.e., the grip end 80). It is to be noted that this grip portion 115 may also be present on the main body 65 of the attachment element 60 according to the first mode of the invention. Further, in other embodiments, the profile of the grip portion may vary, for example, may be square, so long as it locally increases the width of the body 65.

In a third embodiment of the invention shown in fig. 19 to 22, the central region 70C is extended by at least one undulation 90, so that, when the insertion end is inserted into the slot, the passage of the undulation 90 causes a reversible deformation of at least one wall 100 defining the slot 36 or of the insertion end 70, so as to constrain the insertion end in the slot 35.

In the embodiment shown in fig. 19 to 22, the undulations 90 are formed by an extension of the central region 70C, which extension of the central region 70C forms the edge bend 120 of the central region 70C. More precisely, the central region 70 is extended by two undulations 90 forming two edge bends 120 located on either side of the central region 70C. In other words, as can be seen in fig. 22, the cross section of the insertion end 70 extends in a circular arc shape.

Upon insertion of insertion end 70 into slot 35, edge bend 120 may reversibly deform to constitute a laborious point of restraint of insertion end 70 in slot 35. In a variant, it is also conceivable for the seam 35 to be deformed at the edge bend 120 when the insertion end 70 is inserted.

The invention also relates to a tether 50 for the shutter 40 of the opening 20 formed in the wall 30 of the bodywork element 10. The strap 50 comprises, at one of its ends, an attachment element 60 according to the invention, which attachment element 60 is adapted to cooperate with the housing 35 present on the wall 30 to connect the strap 50 to the wall 30.

The invention also relates to a blocking flap 40 of an opening 20 formed in a wall 30 of a body part 10. The flap 40 comprises a tape according to the invention, which is provided with an attachment element 60 according to the invention, in particular at one of its ends.

According to one embodiment, the attachment element 60 and/or the wall 100 defining the slit are made of a plastic material such as: polypropylene (PP), a mixture of Polycarbonate (PC) and polybutylene terephthalate (PBT), a mixture of Polycarbonate (PC) and Acrylonitrile Butadiene Styrene (ABS), etc.

The length of the attachment element is preferably limited to 10mm long, which allows particularly easy integration of the insertion element into the various environments of the vehicle flap.

The invention is not limited to the embodiments described, other embodiments will be apparent to those skilled in the art. It is particularly feasible that the attachment element does not have an axis of symmetry. For example, the attachment element may actually correspond to a single half of the two halves defined by the axis of symmetry.

List of reference numerals:

10: parts of motor vehicles

20: openings formed in the wall of the part 10

30: wall of the part 10 comprising an opening 20

35: receptacles present in the wall 30 to connect the tethers 50 to the wall 30

36: seam of receptacle

40: blocking shutter for opening 20

50: lace allowing to maintain the attachment of the trap 40 to the piece 10

55: restraining device

60: attachment element of a strap 50 adapted to cooperate with a housing 35

65: main body of attachment element

70: insertion end of attachment element 60 of strap 50

70C: central region of the insertion end

71: first wall of insert end 70

72: second wall of insert end 70

80: holding end part

85: junction between body 65 and insertion end 70

90: convex portion of insertion end portion 70

91: first convex part

92: second convex part

93: apex of the convex part

93A: first wall of the convex part

93B: second wall of the convex part

100: deformable wall of slot

110: sheet

115: holding part

120: edge bend