FR2986193A1 - Device for protecting movable free end of rear portion of slide of car seat, has cap movable between protection position and sliding motion position to authorize sliding motion of moving part with respect to fixed part of slide - Google Patents

Abstract

The device has a cap movably mounted on a moving part (2) of a slide (1) such that the cap is movable between protection position and sliding motion position to authorize sliding motion of the moving part with respect to a fixed part (3) of the slide. The cap partially covers rear free end of the moving part in the protection position and releases the rear free end of the moving part in the sliding motion position. A flap extends perpendicularly to a sliding motion axis (A1) when the cap is in the protection position. Independent claims are also included for the following: (1) a car seat (2) a slide.

Description

TECHNICAL FIELD TO WHICH THE INVENTION RELATES The present invention relates generally to the field of motor vehicles and their interior fittings. It relates in particular to a device for protecting a rear free end of a movable part of a slideway for a motor vehicle seat, the movable part of the slideway being adapted to slide relative to a fixed part of the slideway according to a sliding axis. It also relates to a slideway of a motor vehicle comprising such a device and a motor vehicle seat comprising such a slideway. TECHNOLOGICAL BACKGROUND Motor vehicle seats are mounted on vehicles by means of runners that allow the seats to be movable in translation by sliding a movable portion of the slide relative to a fixed portion of this slide. The movable portion of the slide is secured to the seat while the fixed portion of this slide is secured to the vehicle. The movable portion of the slide is most often made of a part 20 of sheet metal cut and folded so that the final shape obtained can enter the fixed part of the slide and slide inside thereof. The free ends of the movable portion of the slideway thus often have sharp and sharp edges. When a motor vehicle seat is in a retracted position toward the rear of the vehicle, the rear free end of the movable portion of the slide protrudes from the fixed portion of the slide. A passenger located behind the seat that is in the retracted position may then hit the sharp edges of the free end rear of the movable part. This situation can be dangerous, for example when the passenger 30 is wearing open shoes or no shoes at all. Indeed, the passenger may be injured. Some vehicles have a small piece of rubber or plastic attached to the end of the movable portion of the slide so as to limit the risk of injury to this free end.

However, this solution proves to be insufficient because this rubber or plastic part covers only a part of the movable part of the slideway, leaving uncut portions of the free end uncovered.

It is furthermore impossible to extend this part in order to cover a larger part of the free end of the movable part of the slideway without hindering the sliding movement of the movable part of the slide with respect to the fixed part when the seat moves from the retracted position where the movable part of the slide protrudes from the fixed part, to the advanced position where the movable part of the slide returns inside the fixed part of this slide. OBJECT OF THE INVENTION In order to overcome the above-mentioned drawback of the state of the art, the present invention proposes a device for protecting a free rear end of the movable part of a motor vehicle seat slideway making it possible to more effectively protect a passenger from the risk of injury on the free rear end of the movable portion of the slide, while preserving the free sliding of this movable portion relative to the fixed portion of this slide. More particularly, the invention proposes a protective device as defined in the introduction, in which there is provided a cover adapted to be mounted movably on said movable portion of said slide, so that said cover is movable between: a protective position in which said cover at least partially covers the free rear end of the movable portion of said slide, and a sliding position in which said cover releases the free end of the movable portion of said slideway so as to allow sliding of the movable portion of said slide relative to the fixed portion of said slide. Thus, thanks to the protective device, the free end of the movable portion of said slide can be fully covered when it exceeds the fixed portion of this slide. The risk of injury to passengers' feet is then severely limited. In addition, the protection device does not disturb the normal operation of said slide and does not hinder the sliding of the movable portion of said slideway inside the fixed part when the seat passes from a retracted position towards the rear vehicle to an advanced position towards the front of the vehicle. In addition, this solution is suitable for a majority of slides and can be adapted to several vehicles of an automotive range. This makes it possible to produce a very large number of identical parts and thus to reduce the production costs of such a protective device. Finally, this solution has a small footprint, to the benefit of ergonomics and space available for passenger feet of vehicles equipped with such a device. Other non-limiting and advantageous features of the protection device according to the invention are as follows: said hood comprises at least three lateral walls which are fixed relative to one another; said hood comprises a single flap; When said cover is in the protective position, said flap extends substantially perpendicularly to said sliding axis; - Said device comprises a base on which is mounted movably said cover, and two lateral wings extending parallel to said sliding axis, movably mounted on said base to move away from one another. - Mounting means is provided for said cover relative to the movable portion of said slideway, said mounting means allowing a pivoting of said cover about a pivot axis perpendicular to the sliding axis of the slideway; said mounting means comprise at least one hinge; Said hinge is formed by an elastically deformable portion forming with said hood; said mounting means comprise an attachment with the movable portion of said slide, said clip being distinct from the movable portion of said slideway and adapted to be fixedly mounted on the movable portion of said slideway; Said mounting means comprise a fastener with the movable part of said slideway, said fastener coming at least partially of formation with the movable part of said slideway. said hood comprises return means adapted to return the hood to its protective position; said cover comprises release means adapted to move the cover from its protective position to its sliding position by means of the sliding of the free rear end of the movable part of said slide with respect to the fixed part of said slide.

The invention also proposes a motor vehicle seat comprising a seat and a backrest, characterized in that it also comprises a movable portion of a slideway equipped at one of its free ends with a protection device according to the invention. 'invention. The invention also proposes a motor vehicle slide having a fixed portion and a movable portion adapted to slide relative to said fixed portion along a sliding axis, and characterized in that it comprises, at one of the free ends of said movable part, a protection device according to the invention. Other non-limiting and advantageous features of the slideway for a motor vehicle seat according to the invention are the following: said protective device and said movable part are formed in one piece; said protective device is attached to said movable part of said slideway.

DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT The following description with reference to the accompanying drawings, given by way of non-limiting examples, will make it clear what the invention consists of and how it can be implemented. In the accompanying drawings: - Figure 1 is a schematic perspective view of a first embodiment of the protection device according to the invention, the cover is in the protective position; - Figure 2 is a schematic perspective view of the protection device of Figure 1, the cover is in the sliding position; - Figure 3 is a schematic perspective view of a second embodiment of the protection device according to the invention, the cover is in the protective position; and FIG. 4 is a diagrammatic perspective view of the protection device of FIG. 3, the cover of which is in the sliding position.

In the preamble, it will be noted that the identical or similar elements of the different embodiments shown in the different figures will be referenced by the same reference signs and will not be described each time.

Note also that in the following description, the terms "front" and "rear" will be used with respect to the motor vehicle, the front designating the side facing the hood of the vehicle and the rear designating the side facing the trunk . Similarly, the terms "lower" and "upper" will refer to the sides facing the floor and to the roof of the vehicle.

FIGS. 1 and 2 show, on the one hand, and FIGS. 3 and 4, on the other hand, two embodiments of a device for protecting a free rear end of a moving part of a slide of a motor vehicle seat. This car has a cabin designed to accommodate 15 passengers. The living space here includes two front seats and a rear seat type "bench" with three seats. One of the front seats is reserved for the driver of the vehicle, and the other front seat is intended to accommodate another front passenger. The passenger compartment comprises a floor in one or more thicknesses on which the vehicle seats are mounted. These seats can be mounted directly on the floor, or indirectly through intermediate elements attached to the floor. Each of the two front seats is here directly mounted on the floor of the vehicle by two identical rails, sliding axes Al 25 substantially horizontal and parallel. In the rest of the description, we will focus only on one of these slides to describe its structure and operation. As shown in Figures 1 to 4, the slide 1 has a fixed portion 3 equipped with floor attachment means and a movable portion 2 equipped with fastening means to the seat cushion. The fixed part 3 of the slide 1 consists of an elongated piece of folded sheet metal, which is profiled along the sliding axis A1 and which has a cross section to this axis which is uniform, substantially U-shaped. It thus comprises a flat bottom and two wings that rise from the edges of this flat bottom, substantially perpendicular to it. The front edges of these wings are here further bent towards each other and towards the bottom, so as to delimit each a rail 6 with the corresponding wing. Alternatively, any other form of adequate section may be used by those skilled in the art. The fixing means of the fixed part 3 of the slide 1 on the floor of the vehicle here comprise simple holes in the flat bottom of the fixed part 3, which are regularly spaced along the latter, and which can accommodate fixing screws. The fixed part 3 of the slide 1 here has a length of 52 centimeters. The movable portion 2 of the slideway 1 is here also constituted by an elongated piece of folded sheet metal, which is profiled along the sliding axis A1 and which has a cross section to this axis allowing the movable part 2 to fit together inside the fixed part 3 of the slideway 1 and slide therein in a single mobility in translation along the axis of sliding Al. This movable part 2 of the slideway 1 here has an "IF" section, with a flat front wall and two wings descending from the edges of this front wall, substantially perpendicular to it. The rear edges of these wings are here curved further away from each other and forward, so as to be respectively engagable in the two rails 6 delimited by the fixed part 3 of the slide 1. The fastening means of the movable part 2 of the slide 1 on the seat here comprise simple holes in its front wall, which can accommodate fixing screws. The moving part 2 of the slide 1 here has a length of 38.5 centimeters. The slides of each seat thus allow the seats to be set in translation movement in a direction parallel to the sliding axis A1. In the case where the slides are mounted perpendicularly to the board, the seats can therefore move freely. 'back and forth away from the dashboard and vice versa getting closer to the dashboard. When the seat considered is in the most rearward position towards the rear seat, hereinafter referred to as "retracted position", the movable part 2 of the slideway 1 partly exceeds the fixed part 3 of the slideway 1 (see FIG. 2). .

On the contrary, when the passenger advances his seat to bring it closer to the dashboard, the movable portion 2 of the slide 1 slides in the fixed part 3 of the slide 1, entering inside thereof. When the seat reaches the most advanced position, hereinafter called "advanced position", the movable portion 2 of the slide 1 is entirely located inside the fixed part 3 (see Figure 1). The movable portion 2 of the slide 1 has a rear free end 4 having sharp edges. These sharp edges can be dangerous, for example when the foot of a passenger sitting in the back seat comes knocking. It is understood that in advanced position, where the rear free end 4 of the movable part 2 of the slide 1 is retracted inside the fixed part 3, these cutting edges are not dangerous for the passengers sitting on the seat back.

However, in the retracted position, where the rear free end 4 of the movable portion 2 of the slide 1 protrudes outside the fixed portion 3, these cutting edges are apparent and are therefore dangerous for passengers sitting on the back seat. The object of the present invention is then to cover by a cover 10; 20 this free rear end 4 when the movable portion 2 of the slide 1 protrudes outside the fixed portion 3, without the cover 10; 20 does not interfere with the sliding of the movable portion 2 of the slide 1 relative to the fixed portion 3. For this, according to a particularly advantageous feature of the invention, the cover 10; 20 is movably mounted on the movable portion 2 of the slideway 1, between: - a protective position, in which the cover 10; At least partially covers the rear free end 4 of the movable part 2 of the slideway 1 (FIGS. 1 and 3), and a sliding position, in which the cover 10; 20 is erased to allow the sliding part 2 of the slide 1 to slide in the fixed part 3 of the slideway 1 (FIGS. 2 and 4). In the two embodiments respectively shown in Figures 1 and 2 on the one hand, and in Figures 3 and 4 on the other hand, the protective device also comprises mounting means comprising, on the one hand, a hinge 102, 202 allowing the cover 10, 20 to pivot about a pivot axis A2 perpendicular to the sliding axis A1, and secondly, a fastener 101, 201 fixed to the movable portion 2 of the slide 1.

This device also comprises means for returning the cover in the protective position and release means, which allow the cover 10, 20 to be erased in favor of the sliding of the movable part 2 in the fixed part 3 of the slide 1 , so as not to hinder this slide. In Figures 1 and 2, there is shown the first embodiment of the protection device according to the invention. In this embodiment, the cover 10 delimits a lower housing in which is housed entirely the rear free end 4 of the movable portion 2 of the slide 1 when the seat is in the retracted position. The cover 10 thus comprises a flat upper wall 14 and three flat lateral walls 11, 12, 13 which descend from three of the four edges of the upper wall 14. These three lateral walls 11, 12, 13 are perpendicular to the upper wall 14. A first of these walls 11 is substantially perpendicular to the second of these walls 12, which is itself substantially perpendicular to the third of these walls 13. Thus, the first wall 11 and the third wall 13 are substantially parallel to each other. and parallel to the sliding axis A1. They are arranged to cover the two wings of the movable portion 2 of the slide 1. The second wall 12 is, in turn, parallel to the pivot axis A2. It is thus arranged to cover the rear free end 4 of the movable portion 2 of the slide 1 when the cover 10 is in its protective position (Figure 1). The three side walls 11, 12, 13 here have a thickness of 1 to 2 millimeters. The three lateral walls 11, 12, 13 are arranged in such a way that they delimit together a housing whose dimensions are adjusted to those of the rear free end 4 of the movable part 2 of the slideway 1. In the embodiment particular shown in Figures 1 and 2, the cover mounting means 10 on the movable portion 2 of the slide 1 here comprise a clip 101 which has a shape of semi-circular hoop. Due to its shape, this fastener 101 is fixedly mounted on a portion of complementary shape of the movable portion 2 of the slide 1, by interlocking. Alternatively, the fastener could be for example welded, glued or clipped on the movable portion of the slide. The hinge 102, which connects the fastener 101 to the cover 10, extends, for its part, between the front edge of the upper wall 14 of the cover 10 (which is curved for this purpose to extend around the fastener 101) and the trailing edge of the fastener 101. The hinge 102 is here a hinge-type "hinge-film". By this is meant that the hinge 102 is flat, parallel to the pivot axis A2, of reduced thickness and elastically deformable.

It is here formed in one piece with the cover 10 and the fastener 101. The hinge 102 here has the shape of a plastic tape whose thickness is between 1 and 2 millimeters. The thickness of this hinge-film 102 is thus low enough to allow the latter to be bent easily around the pivot axis A2.

It is sufficient to minimize the risk of malfunction, this hinge 102 to undergo a large number of pivoting, and this sometimes in extreme temperature conditions. Alternatively, the hinge could be formed of two separate parts, including a hinge attached to the fastener and a hinge attached to the hood.

Here, the hinge 102, the cover 10 and the fastener 101 are made of a plastic material, such as for example polypropylene. This material is chosen in particular for its low density, low cost, ease of machining and its mechanical and thermal properties in the cabin temperature range usually tested. The range is, for example, from -30 ° C. to + 60 ° C.

Alternatively, the device could be made of metal, for example aluminum, steel, for example stainless steel, or another plastic. The material of the hinge 102, the cover 10 and the fastener 101 is colored black so as to be less visible in the passenger compartment. The means for returning the cover 10 in the protective position are here formed by the hinge 102 itself, whose elastically deformable nature makes it possible to return the cover 10 to the protective position. These return means could also include a torsion spring, or any other suitable device known to those skilled in the art. The release means comprise, in turn, at least one ramp which is formed with the cover 10 and which, when the movable portion 2 of the slideway 1 is translated relative to the fixed portion 3, abuts on the rear free end 5 of the fixed part 3 of the slide 1 and slides on it so that it causes the tilting of the cover 10 in the sliding position.

Here, these release means comprise three distinct ramps, formed by three flaps 111, 112, 113 curved towards the outside of the cover 10. The second side wall 12, located at the rear of the cover 10, more precisely has a notch 114 in its lower edge, in which extends one of the flaps 112 which is curved rearwardly. Two other flaps 111, 113 extend from the front edges of the first and third side walls 11, 13, forwards, and are curved outwardly in opposite directions. The edges and corners of the hood 10, which are oriented towards the rear, are preferably rounded to prevent the risk of injury in case of impact.

In the case of a manufacture of the plastic cover 10, for example by injection molding, it is easy to optimize the shape of these edges during the design of the injection mold. Alternatively, any other form of edges not having a sharp edge may be considered by the skilled person.

The operation of the protective device will now be described with reference to FIGS. 1 and 2. In the situation shown in FIG. 1, the seat considered is in the retracted position and the protective device is in the protective position. In this position, the movable portion 2 of the slideway 1 and its rear free end 4 protrudes behind the fixed portion 3 of the slideway 1. Now, the clip 101 is fixed to the rear free end 4 of the the movable part 2 of the slide 1. Therefore, in this protective position, the cover 10 is tilted down and completely covers the free rear end 4 of the movable portion 2 of the slide 1. Thus, the sharp edges this rear free end 4 are completely masked and are not likely to cause injuries, for example shocks. From this retracted position, now consider that the passenger advances his seat to bring it to the advanced position, by sliding the movable portion 2 of the slide 1 relative to its fixed portion 3 along the sliding axis A1. When the rear free end 4 of the movable part 2 of the slide 1 comes into line with the rear free end 5 of the fixed part 3 of the slide 1, the three ramps 111, 112, 113 of the cover 10 come leaning on the fixed part 3 of the slide 1, which causes the tilting of the cover 10 from bottom to top around the pivot axis A2. This pivoting makes it possible to release the free rear end 4 of the movable part 2 of the slide 1, the cover 10 then no longer covering the rear free end 4, so that the movable part 2 of the slide 1 can continue 10 its sliding movement relative to the fixed part 3 of the slide 1. During this sliding, the flap 112 of the side wall 12 rests and slides on the upper part of the fixed part 3 of the slide 1, without hindering this sliding . The side walls 11 and 13 slide along the outer faces of the wings of the fixed portion 3 of the slide 1. 15 Finally consider the case where the seat passes from the advanced position to the retracted position. When the rear free end 4 of the movable part 2 of the slide 1 arrives at the plumb and then exceeds the rear free end 5 of the fixed portion 3 of the slide 1, so that the flap 112 of the side wall 12 no longer rests on the fixed part 3 of the slide 1, the cover 10 tilts from top to bottom around the pivot axis A2. The cover 10 then returns to its previously described protective position. Figures 3 and 4 show the second embodiment of the protective device according to the invention. In this embodiment, the protection device comprises a base 30 on which is mounted movably the cover 20, and two lateral wings 31A, 33A movably mounted on the base 30. The base 30 has here a shape such that it covers the part of the rear free end 4 of the movable part 2 of the slide 1 which protrudes above the fixed part 3 of the slide 1. The base 30 has for this purpose a top wall 34 and three side walls 31, 32, 33 planes descending from three of the four edges of the upper wall 34. These three side walls 31, 32, 33 are perpendicular to the upper wall 34. A first of these walls 31 is substantially perpendicular to the second of these walls 32, which is itself substantially perpendicular to the third of these walls 33. Thus, the first wall 31 and the third wall 33 are substantially parallel to each other and parallel to the sliding axis A1. They are arranged to partially cover the two wings of the movable portion 2 of the slide 1. The second wall 32 is, in turn, perpendicular to the sliding axis A1. It is thus arranged to be placed at the rear of the rear free end 4 of the movable part 2 of the slide 1.

The three side walls 31, 32, 33 here have a thickness of 1 to 2 millimeters. The two lateral wings 31A, 33A are formed by simple flaps respectively movably mounted on the lower edges of the first and third side walls 31, 33 of the base 30. They are here rotatably mounted around two axes substantially parallel to the axis. sliding A1, to move away or closer to each other. The two lateral wings 31A, 33A have widths and thicknesses substantially equal to those of the first and third side walls 31, 33 of the base 30. They have heights such that, when the movable portion 2 of the slideway 1 is in the retracted position and when they extend vertically, they then cover the wings of this movable portion 2. The front and rear edges of the two side wings 31A, 33A are further curved outwardly to form ramps. Thus, when the movable portion 2 of the slide 1 slides forward, these ramps bear against the rear free end 5 of the fixed portion 3 and cause the spacing of the lateral wings 31A, 33A, so as not to hinder sliding of the movable portion 2 of the slide 1 relative to the fixed portion 3. The cover 20 is, for its part, formed by a single flap 21, of width and thickness substantially equal to those of the second side wall 32 of the base 30, and height such that in the protective position, the flap 21 hides the portion of the rear free end 4 of the movable portion 2 of the slide 1 not hidden by the base 30. The mounting means of the cover 20 on the movable portion 2 of the slide 1 here comprise a hinge 202. More specifically, the hinge 202 is located between the upper edge of the flap 21 and the lower edge of the second side wall 32 of the base 30. The axis of pivot A2 of the hinge 202 is perpen to the sliding axis A1 of the movable part 2 of the slideway 1.

The hinge 202 is here also a hinge-type film-hinge, and has characteristics identical to those of the hinge 102 shown in Figures 1 and 2. It comes in particular forming with the cover 20 and the base 30. The means mounting the cover 20 on the movable portion 2 of the slide 1 also include a fastener 201. In the embodiment shown in Figures 3 and 4, the fastener 201 has a semicircular hoop shape and comes from formation with the base 30. This fastener 201 is fixedly mounted on a portion of complementary shape of the movable portion 2 of the slide 1, by interlocking.

Here, the hinge 202, the cover 20, the base 30 and the fastener 201 are made of a plastics material, such as, for example, polypropylene. The return means of the cover 20 in the protective position are here formed by the hinge 202 itself, whose elastically deformable character allows to bring the cover 20 in the protective position.

These means could also include a torsion spring, or any other suitable device known to those skilled in the art. The release means are, in turn, formed by the front face of the flap 21. The flap 21 is in fact curved rearwardly about an axis parallel to the pivot axis A2, so that its front face forms a ramp 25 retracting the flap 21 when it bears against the rear free end 5 of the fixed part 3 of the slide 1. The edges and corners of the base 30 and the cover 20 which are directed towards the back are preferably rounded to prevent the risk of injury in case of shock.

The operation of the protection device will now be described with reference to FIGS. 3 and 4. In the situation shown in FIG. 3, the seat considered is in the retracted position and the protection device is in the protection position. In this position, the movable portion 2 of the slide 1 and its rear free end 4 protrudes behind the fixed part 3 of the slide 1. In this protective position, the cover 20, and more particularly its flap 21 , is tilted in a vertical position and covers the rear free end 4 of the movable portion 2 of the slide 1. Thus, the cutting edges of this rear free end 4 are completely hidden by the cover 20 and the base 30 and they are not likely to cause injuries, for example during shocks. From this retracted position, now consider that the passenger advances his seat to bring it to the advanced position, by sliding the movable portion 2 of the slide 1 relative to its fixed portion 3 along the sliding axis A1. When the rear free end 4 of the movable portion 2 of the slide 1 comes into line with the rear free end 5 of the fixed portion 3 of the slide 1, the flap 21 of the cap 20 is supported on the fixed part 3 of the slide 1, which causes the flap 21 to tilt about the pivot axis A2, to a substantially horizontal position. This pivoting makes it possible to release the rear free end 4 of the mobile part 2 of the slideway 1, which can then continue to slide forward. During this sliding, the flap 21 rests on the fixed part 3 of the slide 1 and slides on it, without hindering this sliding. The lateral wings 31A and 33A pivot to move away from each other and slide along the outer faces of the lateral wings of the fixed portion 3 of the slide 1. Finally consider the case where the seat passes from the advanced position in the retracted position.

When the rear free end 4 of the movable part 2 of the slide 1 reaches the plumb course and then projects beyond the rear free end 5 of the fixed part 3 of the slide 1, so that the flap 21 of the cover 20 relies more on the fixed part 3 of the slide 1, the flap 21 tilts from top to bottom, around the pivot axis A2, under the effect of the gravity and the elasticity of the hinge 202.

The cover 20 then returns to its previously described protective position. As an alternative to the two particular embodiments of the invention described above, all or part of the protection device may come into formation with the movable portion of the slideway. In particular, it can be provided that the attachment of the hood, as well as the mass grave of the hinge are formed with this mobile part.

Claims (12)

REVENDICATIONS1. Device for protecting a rear free end (4) of a mobile part (2) of a slide (1) of a motor vehicle seat, said movable part (2) of said slide (1) being adapted to sliding relative to a fixed part (3) of said slide (1) along a sliding axis (A1), characterized in that it comprises a cover (10; 20) adapted to be mounted to move on said movable part (2 ) of said slide (1), such that said cover (10; 20) is movable between: - a protective position in which said cover (10; 20) at least partially covers the rear free end (4) of the movable part (2) of said slide (1), and - a sliding position in which said cover (10; 20) releases the rear free end (4) of the movable part (2) of said slide (1) so as to allow the sliding portion of the movable part (2) of said slide (1) to be slid with respect to the fixed part (3) of said slide re (1). 2. Protective device according to claim 1, wherein said cover (10) comprises at least three side walls (11, 12, 13) fixed relative to each other. 3. Protective device according to claim 1, wherein said cover (20) comprises a single flap (21). 4. Protection device according to claim 3, wherein, when said cover (20) is in the protective position, said flap (21) extends substantially perpendicularly to said sliding axis (A1). 5. Protective device according to claim 4, comprising a base (30) on which is mounted movably said cover (20), and two lateral wings (31A, 33A) extending parallel to said sliding axis (A1), movably mounted. on said base (30) to move away from each other. 6. Protection device according to one of claims 1 to 5, wherein there is provided means for mounting said cover (10; 20) relative to the movable portion (2) of said slide (1), said means of mounting allowing a pivoting of said cover (10; 20) about a pivot axis (A2) perpendicular to the sliding axis (A1) of the slide (1). 7. Protective device according to claim 6, wherein said mounting means comprise at least one hinge (102; 202). 8. Protection device according to claim 7, wherein said hinge (102; 202) is formed by an elastically deformable portion formed with said cover (10, 20). 9. Protection device according to one of claims 1 to 8, wherein said cover (10; 20) comprises return means (102; 202) adapted to return the cover (10; 20) in its protective position. 10. Protection device according to one of claims 1 to 9, wherein said cover (10; 20) comprises release means adapted to move the cover (10; 20) from its protective position to its sliding position. , by virtue of the sliding of the rear free end (4) of the movable part (2) of said slide (1) with respect to the fixed part (3). 11. Motor vehicle seat comprising a seat and a backrest, characterized in that it also comprises a movable part (2) of a slide (1) equipped at one of its free ends with a protective device according to one of claims 1 to 10. 12. Slideway (1) of a motor vehicle having a fixed part (3) and a movable part (2) adapted to slide relative to said fixed part (3) along a sliding axis (A1), and characterized in that it comprises, at one of the free ends of said movable part (2), a protection device according to one of claims 1 to 10.