FR3102107A1 - Slide rail for motor vehicle seat - Google Patents

Abstract

The present invention relates to a slideway comprising a support profile, and a movable profile sliding relative to the support profile in a longitudinal direction (X). One of the profiles comprises a play absorption device (60) comprising a coil spring (62) extending in a direction of elevation (Z) for resiliently absorbing a play between said profiles in the direction of. elevation (Z), or extending in a transverse direction (Y) to elastically absorb a play between said sections taken in the transverse direction (Y), the direction of elevation (Z) being perpendicular to the longitudinal direction ( X), the transverse direction (Y) being perpendicular to the longitudinal direction (X) and being distinct from the direction of elevation (Z). Figure for abstract: 4

Description

Motor vehicle seat slider

The present invention relates to a slide for a motor vehicle seat comprising a support profile and a movable profile, the movable profile being movable in sliding relative to the support profile in a longitudinal direction, the support profile and the movable profile respectively comprising a base.

Such a slide is used in particular to carry, by means of its movable profile, the seat cushion, in order to allow movement of the seat in the longitudinal direction. The seat then exerts stresses on the slide, in particular due to its own weight.

The mobile profile and the support profile always have manufacturing tolerances which are the source of play between them, once they are assembled to each other.

In known slides, the two sections are assembled under stress to compensate for these games by the elasticity of the material in which the sections are made. In addition, balls are interposed between the two sections, in order to make them mobile relative to each other.

However, this solution is not satisfactory, especially for long slides. Indeed, the balls do not travel the same distance as the profiles.

In addition, the stresses exerted by the seat on the slide, which is variable depending on the load carried by the seat, can aggravate the clearances between the movable profile and the support profile.

In addition, the manufacturing tolerances may be too large to be compensated by the elasticity of the material of the profiles.

This absence of clearance compensation between the two sections of the slide produces a gap between them which can cause malfunctions and degrades the quality perceived by the user.

An object of the invention is therefore to provide a slideway making it possible to compensate for the clearances between the mobile profile and the support profile.

The invention thus relates to a slide of the aforementioned type in which at least one of the mobile profile and of the support profile comprises at least one device for absorbing play fixed to the base of said profile, the device for absorbing set comprising at least a first helical spring extending in an elevation direction to elastically absorb play between said sections taken in the elevation direction, or extending in a transverse direction to elastically absorb play between said sections taken in the transverse direction, the direction of elevation being perpendicular to the longitudinal direction, the transverse direction being perpendicular to the longitudinal direction and being distinct from the direction of elevation.

Thanks to such a slide, compensation in several directions of the play between the sections is possible and at low cost. The probability of slide malfunctions is reduced and the perceived quality is therefore improved for the user.

The perceived quality is all the more improved as the compensation remains comfortable for the user who does not feel it. Indeed, the compensation produces no noise and no vibration.

In addition, the slider makes it possible to adapt to more severe specifications.

The slide is also made more rigid in the elevation and transverse directions.

In addition, the slide is easy to assemble, with each absorption device itself being easy to assemble.

The slide according to the invention may comprise one or more of the following characteristics, taken separately or in any technically possible combination:

- the backlash absorbing device comprises a second coil spring extending substantially parallel to the first coil spring to elastically absorb a backlash between said sections in the same direction as said first coil spring;

- the slack absorbing device comprises a base body carrying the or each coil spring, the slack absorbing device being fixed to the base of said section via the base body;

- the absorption device further comprises a buffer, the base body of the absorption device delimiting a receiving housing in which the or each coil spring is received, the buffer being fixed to the base body by compressing the or each spring helical in the direction in which it extends;

- the buffer comprises, for each coil spring, a guide rod surrounded by the coil spring, the buffer being movable relative to the base body between an extended position, in which the buffer is retained on the base body by at least one projection clipping position and in which one end of each guide rod is away from the base body, and a retracted position, in which the end of each guide rod is in contact with the base body;

- the buffer comprises at least one clipping tab, the clipping tab having the clipping projection;

- the base body comprises, for each coil spring, a guide pin extending into the receiving housing, the guide pin being surrounded by the coil spring, and, in the retracted position, the end of each guide is in contact with one of the guide fingers of the base body;

- the play absorbing device further comprises a blade or at least one other helical spring extending along the other of the transverse direction and the direction of elevation to elastically absorb a play between said sections taken according to the other of the elevation direction and the transverse direction; And

- The movable profile is movable in sliding relative to the support profile in the longitudinal direction over a maximum stroke greater than 250 mm.

The invention also relates to a motor vehicle seat comprising a seat, the seat being carried by the movable section of a slide as defined above.

The invention will be better understood on reading the following description, given solely by way of example, and made with reference to the accompanying drawings, in which:

Figure 1 is a schematic view of a vehicle seat;

Figure 2 is a sectional view of the slide of the seat of Figure 1;

Figure 3 is a perspective view of the movable section of the slide of the seat of Figure 1 and;

Figure 4 is an exploded perspective view of the play absorption device of the slide of the seat of Figure 1.

Figure 1 schematically shows a motor vehicle seat 10 mounted on a slide mechanism 12.

In the following description, when referring to absolute position qualifiers, such as "front", "rear", "top", "bottom", "left", "right", etc., or relative, such as the terms "above", "below", "upper", "lower", etc., or to qualifiers of orientation, such as "horizontal", "vertical", etc., it is made reference, unless otherwise specified, to the orientation of the figures or of a seat in its normal position of use, in particular in a vehicle.

The seat 10 comprises a seat 14 and a backrest 16.

The backrest 16 is mounted on the seat 14, for example pivoting around an axis of rotation 18 by a hinge mechanism 20.

The slide mechanism 12 comprises in this example at least two slides 28.

Preferably, the slide mechanism 12 also comprises a control element 34 for sliding the slides 28.

Each slide 28 comprises a support profile 30 and a mobile profile 22.

Each slide 28 also comprises a plurality of rolling elements 32.

The movable profile 22 is movable in sliding relative to the support profile 30 in a longitudinal direction X.

Each slide 28 thus allows movement of the seat 10 in the longitudinal direction X relative to a floor 32A of a motor vehicle comprising the seat 10 and the mechanism 12.

The longitudinal direction X is for example perpendicular to the axis of rotation 18 of the backrest 16.

Figure 1 also illustrates an elevation direction Z perpendicular to the longitudinal direction X.

The direction of elevation Z is for example vertical, when the vehicle comprising the seat 10 and the mechanism 12 is stationary on a flat and horizontal surface.

The support profile 30 is here fixed to the floor 32A of such a motor vehicle.

The support profile 30 preferably has a length greater than 1 m, for example between 1 m and 3 m.

As seen in Figure 2, the support profile 30 includes a base 36.

The support profile 30, and in particular its base 36, have dimensional variations due to manufacturing tolerances.

The base 36 of the support profile 30 is in one piece.

It is for example made of metal.

The base 36 of the support section 30 extends mainly in the longitudinal direction X.

The base 36 has substantially a U-shaped section open towards one side, this section being taken perpendicular to the longitudinal direction X.

The base 36 includes a main wall 38, an upper wing 40 and a lower wing 42.

The main wall 38 is substantially planar and is parallel to the longitudinal direction X and to the elevation direction Z.

The main wall 38 connects the upper wing 40 and the lower wing 42, spaced from each other in the direction of elevation Z.

The upper and lower wings 40, 42 are curved along their lengths.

In particular, they are curved towards the inside of the U.

The base 36 defines, at the level of each wing 40, 42, a housing 43A, 43B capable of receiving respectively at least a part of the movable profile 22.

Each housing 43A, 43B is formed by the main wall 38 and one of the wings 40, 42.

In particular, each wing 40, 42 thus comprises at least a first part 45A extending substantially perpendicular to the main wall 38 and an angled part 45B extending from the first part 45A while being folded towards the main wall 38.

Each housing 43A, 43B is formed by at least the main wall 38, the first part and the bent part of the wing 40, 42.

The upper and lower flanges 40, 42 thus respectively form a curved portion, extending mainly in the longitudinal direction X.

The movable profile 22 is movable in sliding relative to the support profile 30 in the longitudinal direction X over a maximum stroke greater than 250 mm.

The mobile profile 22 comprises a base 44.

The movable profile 22, and in particular its base 44, have dimensional variations due to manufacturing tolerances.

The mobile profile 22 carries the seat 14 of the seat 10.

The seat 10 is thus movable together with the movable profile 22 along the longitudinal direction X with respect to the support profile 30 and therefore with respect to the floor 32A.

The movable profile 22 thus comprises, for example, support blocks 46 of the seat 14 of the seat 10, also called stretchers, fixed to the feet 24 of the seat 10. In the example of FIG. 3, the movable profile 22 comprises two support blocks 46. Alternatively, the movable profile 22 comprises only one or more than two.

The base 44 of the mobile profile 22 is in one piece.

It is for example made of metal.

The base 44 of the movable section 22 extends mainly in the longitudinal direction X.

As illustrated in Figure 3, the base 44 of the movable section 22 delimits a plurality of closed contour slots intended for receiving and fixing other elements of the slide 28 not shown here.

The base 44 of the movable profile 22 comprises a main wall 48, an upper wing 50 and a lower wing 52.

The main wall 48 connects the upper wing 50 and the lower wing 52 of the mobile section 22, spaced from each other in the direction of elevation Z.

The main wall 48 of the movable profile 22 is for example substantially planar and is parallel to the longitudinal direction X and to the elevation direction Z.

The main wall 48 of the movable profile 22 is in this example parallel to the main wall 38 of the support profile 30 and separated from the latter in a direction perpendicular to the main wall 48.

The upper flange 50 and the lower flange 52 of the mobile section 22 extend opposite to each other with respect to a plane passing through the longitudinal direction X and the elevation direction Z.

The upper wing 50 of the mobile profile 22 is for example curved here, towards the lower wing 42 of the support profile 30.

The upper wing 50 of the movable section 22 thus respectively forms a curved portion, extending mainly in the longitudinal direction X.

As illustrated in Figure 3, this curved portion is interrupted along the longitudinal direction X. There is therefore at least one area of the base 44 devoid of upper wing 50.

The upper flange 50 of the mobile profile 22 is received in the housing 43A of the base 36 formed by the main wall 38 and the upper flange 40 of the support profile 30.

The lower wing 52 of the movable profile 22 is for example substantially flat and extends substantially perpendicular to the main wall 48 of the movable profile 22.

The lower flange 52 of the movable section 22 is, as illustrated in Figure 3, interrupted along the longitudinal direction X. There is therefore at least one zone of the base 44 devoid of lower flange 52.

Such a zone devoid of lower wing 52 makes it possible to stiffen the mobile section 22 and to improve crash restraint.

The lower flange 52 of the mobile profile 22 is received in the housing 43B of the base 36 formed by the main wall 38 and the lower flange 42 of the support profile 30.

Each support block 46 is fixed to the base 44 of the movable section 22.

Each support block 46 is for example fixed to the main wall 48 of the movable profile 22.

As shown in Figure 2, each support block 46 extends away from and above the bottom flange 42 of the support channel 30.

Each support block 46 has a base region 54 extending substantially parallel to the main wall 48 of the movable section 22.

This base region 54 is fixed to the main wall 48 of the movable profile 22 and extends in the direction of elevation Z beyond the support profile 30.

In addition, this base region 54 is extended by an upper region 56 for fixing the seat 14 of the seat 10.

Upper region 56 extends substantially perpendicular to base region 54.

The upper region 56 extends until it is above the support profile 30 in the elevation direction Z, in particular until it is above the upper flange 40 of the support profile 30.

In the example of Figure 3, the slide 28 comprises at least two rolling elements 32, arranged for example near the two longitudinal ends of the movable profile 22 and / or the support profile 30.

For each rolling element 32, the base 44 of the mobile profile 22 delimits an opening for receiving the rolling element 32.

Each rolling element 32 comprises for example a wheel 58.

The wheel 58 is fixed on the movable profile 22, so as to be able to rotate around an axis perpendicular to the longitudinal direction X.

Here, the wheel 58 is mounted on the movable profile 22 so that the only possible movement of the wheel 58 relative to the movable profile 22 consists of its rotation around its axis.

The wheel 58 is functionally interposed between the movable profile 22 and the support profile 30 to allow the sliding of the movable profile 22 and of the support profile 30, relative to each other in the longitudinal direction X.

Thus, in projection in a plane perpendicular to the longitudinal direction X, such as that of Figure 2, each wheel 58 protrudes, in the direction of elevation Z, relative to the base 44 of the movable section 22.

In this example, each wheel 58 is attached to one of the support blocks 46.

Each play absorbing device 60 is arranged along the longitudinal direction X between two of the wheels 58.

In addition, here, the section of the wheel 58 is substantially complementary to the section of a longitudinal boss 59, formed on the support section 30. This makes it possible to better guide the wheel 58 in the longitudinal direction X.

The longitudinal boss 59 is for example formed in the lower flange 42 of the support section 30.

As illustrated in Figure 3, at least one of the movable profile 22 and the support profile 30 comprises at least one play absorbing device 60 fixed to the base 36, 44 of said profile 22, 30.

In the example illustrated, it is the mobile profile 22 which comprises two backlash absorption devices 60. Alternatively, the mobile profile 22 comprises more than two backlash absorption devices 60 or only one.

Each play absorbing device 60 is arranged along the longitudinal direction X between two support blocks 46 of the movable section 22.

The absorption devices 60 are in this example substantially identical structurally.

An example of an absorption device 60 is illustrated in more detail in Figure 4.

In the embodiment of Figure 4, the absorption device 60 comprises at least a first helical spring 62 extending along the elevation direction Z to elastically absorb a play between said profiles 22, 30 taken along the elevation direction Z.

The play taken along the elevation direction Z comes in particular from the dimensional variations of the support profile 30 and of the movable profile 22 due to their manufacturing tolerances.

The clearance along the elevation direction Z is in particular defined as the variation in distance, taken along this elevation direction Z, between the base 36 of the support profile 30 and the base 44 of the movable profile 22, in line with the device. absorption 60, when the movable profile 22 slides relative to the support profile 30.

The absorption device 60 also comprises a base body 64.

In addition, the absorption device 60 advantageously comprises a pad 66.

Preferably, and as illustrated in Figure 4, the play absorbing device 60 comprises a second coil spring 70 extending substantially parallel to the first coil spring 62 to elastically absorb a play between said sections in the same direction as said first coil spring 62.

Each coil spring 62, 70 is made of metal.

Each coil spring 62, 70 has a stiffness greater than 5 N/mm.

Such a second helical spring 70 improves the absorption of the forces exerted in the direction of elevation Z on the absorption device 60.

These forces can be relatively high, in particular in the event of buttressing of the movable profile 22 relative to the support profile 30. Such buttressing can occur for example when a user exerts a force on the seat 10 in the longitudinal direction X.

The absorption device 60 is fixed to the base 44 of the movable profile 22 via the base body 64.

The base body 64 is thus for example clipped onto the base 44 of the movable section 22.

For each absorption device 60, the base 44 of the movable profile 22 delimits a notch 68 in which the base body 64 of the absorption device 60 is received.

The base body 64 is for example made of plastic.

The base body 64 additionally carries each coil spring 62, 70.

More precisely, the base body 64 delimits a receiving housing 72 in which each coil spring 62, 70 is received.

This reception housing 72 forms a hollow cavity.

The base body 64 comprises, for each coil spring 62, 70, a guide pin 74 extending into the receiving housing 72, the guide pin 74 being surrounded by the coil spring 62, 70.

Each guide finger 74 thus extends mainly in the direction of extension of the coil spring 62, 70 which surrounds it.

Each guide finger 74 has an outside diameter substantially equal to an inside diameter of the coil spring 62, 70 which surrounds it.

In addition, each guide finger 74 has a predetermined length, taken along the direction of extension of each coil spring 62, 70. The respective predetermined lengths of the guide fingers 74 are for example identical.

As illustrated in Figure 2, the buffer 66 is in contact with the support profile 30. The buffer 66 is in this example in contact with the upper flange 40 of the support profile 30.

In particular, in projection in a plane perpendicular to the longitudinal direction X, the buffer 66 protrudes, in the direction of elevation Z, relative to the rest of the movable section 22.

Buffer 66 is attached to base body 64 by compressing each coil spring 62, 70 according to the direction in which it extends.

Buffer 66 includes, for each coil spring 62, 70, a guide rod 76 surrounded by the coil spring 62, 70.

Each guide rod 76 thus extends mainly in the direction of extension of the coil spring 62, 70 which surrounds it.

Each guide rod 76 has an outer diameter substantially equal to an inner diameter of the coil spring 62, 70 which surrounds it.

In addition, each guide rod 76 has a predetermined length, taken along the direction of extension of each coil spring 62, 70. The respective predetermined lengths of the guide rods 76 are for example identical.

Thus, each coil spring 62, 70 surrounds both one of the guide rods 76 of the pad 66 and one of the guide fingers 74 of the base body 64.

The buffer 66 has two outer bumps 78 intended to be in contact with the support section 30.

Each bump 78 is aligned with one of the coil springs 62, 70.

The buffer 66 has a recess between the two bumps 78.

The buffer 66 comprises at least one clipping tab 80, and, in the example of Figure 4, two clipping tabs 80.

Each clipping tab 80 has at least one clipping projection 82.

In projection in a plane perpendicular to the longitudinal direction X, like that of Figure 2, each clipping lug 80 extends on either side of the coil springs 62, 70.

Each clip tab 80 extends parallel to the direction of extension of the coil springs 62, 70, here the elevation direction Z, beyond one end of each guide rod 76.

Preferably, buffer 66 is movable relative to base body 64 between an extended position, in which buffer 66 is retained to base body 64 by each clipping projection 82 and in which the end of each guide rod 76 is away from the base body 64, and a retracted position, in which the end of each guide rod 76 is in contact with the base body 64.

The buffer 66 is thus movable in the direction in which the coil springs 62, 70 extend.

In the extended position, each coil spring 62, 70 has a predetermined length less than the length at rest of the spring 62, 70, the length at rest being the length of the coil spring 62, 70 in the absence of any mechanical stress on the spring 62, 70.

In the extended position, each clipping projection 82 is in contact with an abutment 84 of the base body 64.

Moreover, in the extended position, the end of each guide rod 76 is away from the guide fingers 74 of the base body 64.

In other words, the sum of the lengths of the guide rod 76 and the guide finger 74, surrounded by one of the springs, is less than the length of the spring in the extended position.

In the retracted position, each clipping projection 82 is away from the base body 64.

Moreover, in the retracted position, the end of each guide rod 76 is in contact with one of the guide fingers 74 of the base body 64.

In other words, the sum of the lengths of the guide rod 76 and of the guide pin 74, surrounded by one of the springs, is substantially equal to the length of the spring in the retracted position.

Thus, in the retracted position, which corresponds to a significant force exerted on the buffer 66, this contact between the buffer 66 and the base body 64 makes it possible to obtain an additional force recovery. The wear of the absorption device 60 is thus reduced.

In the embodiment of FIG. 4, the play absorbing device 60 further comprises a blade 86 for elastically absorbing a play between said sections 22, 30 taken in a transverse direction Y, the transverse direction Y being perpendicular to the longitudinal direction X and being distinct from the elevation direction Z.

The play taken along the transverse direction Y also comes in particular from the dimensional variations of the support profile 30 and of the movable profile 22 due to their manufacturing tolerances.

The clearance along the transverse direction Y is in particular defined as the variation in distance, taken along this transverse direction Y, between the main wall 38 of the support profile 30 and the main wall 48 of the movable profile 22, in line with the blade 86 , when the movable profile 22 slides relative to the support profile 30.

The transverse direction Y is in this example perpendicular to the elevation direction Z.

As illustrated in Figure 2, the blade 86 is in contact with the support profile 30. The blade 86 is in this example in contact with the main wall 38 of the support profile 30.

In particular, in projection in a plane perpendicular to the longitudinal direction X, the blade 86 protrudes, in the transverse direction Y, relative to the rest of the movable section 22.

The blade 86 has two opposite ends, the blade 86 being integral with the base body 64 at its two opposite ends.

The blade 86 is for example made of plastic or metal.

The blade 86 and the base body 64 delimit between them a free space 88.

In particular, the blade 86 has a region, between its two ends, arranged away from the base body 64. The free space 88 is notably defined between this region of the blade 86 and the base body 64.

This free space 88 is capable of allowing an elastic deformation of the strip 86 in the transverse direction Y. In other words, the strip 86 can elastically approach the base body 64 in the free space 88.

In addition, the base body 64 includes a transverse support portion 90 in contact with the support profile 30 and able to act as a counterweight with the blade 86.

In particular, the blade 86 and the transverse support portion 90 are located on either side of a plane passing through the main wall 48 of the movable profile 22.

The transverse support portion 90 is thus in contact with the base 36 of the support section 30.

More precisely, the transverse support portion 90 is in contact with the bent part 45B of the upper wing 40 of the support profile 30.

In comparison with the blade 86, the use of the helical spring(s) 62, 70 to absorb play is advantageous because it makes it possible to absorb more forces.

Insofar as the forces exerted in the direction of elevation Z are greater than those exerted in the transverse direction Y, the use of the coil spring(s) 62, 70 to absorb the play in the direction d Z elevation is particularly suitable and effective.

The manual control element 34 allows relative movement between the movable sections 22 and the support sections 30 by acting on a locking mechanism, not shown.

More specifically, the locking mechanism is capable of passing from a locking configuration, in which, for each slide 28, the movable profile 22 is locked in position relative to the support profile 30, and an unlocking configuration, in which , for each slide 28, the movable profile 22 is movable relative to the support profile 30.

The manual control element 34 is capable of causing the locking mechanism to pass from one of the configurations to the other.

In an alternative not shown, the manual control element 34 is capable of actuating an electric motor to move the movable profile 22 relative to the support profile 30.

A movement of the seat 10 along each slide 28 will now be described.

The seat 10 is in particular moved by an operator who exerts a force in the longitudinal direction X.

This movement is implemented for example to adjust the position of the seat 10 in the longitudinal direction X in a vehicle comprising the seat 10.

In the case of a seat of a driver of the vehicle, this movement is for example implemented to bring the seat 10 closer to or further from a steering wheel of the vehicle.

The movable profile 22 then slides relative to the support profile 30 in the longitudinal direction X.

During this sliding, the wheel 58 of each rolling element 32 rotates around its axis perpendicular to the longitudinal direction X.

During sliding, the buffer 66 moves along the direction of extension of the springs 62, 70, here the direction of elevation Z, depending on the dimensional variations between the support profile 30 and the movable profile 22.

During this displacement of buffer 66, buffer 66 compresses or relaxes each coil spring 62, 70, and thus absorbs the play between the two sections 22, 30 taken in this direction.

In addition, the transverse support portion 90 of the base body 74 counterbalances the blade 86 of each absorption device 60 which deforms in the transverse direction Y.

The blade 86 thus absorbs the play between the two sections 22, 30 taken along this transverse direction Y.

During sliding, the blade 86 deforms in the transverse direction Y, depending on the dimensional variations between the support profile 30 and the movable profile 22.

The blade 86 thus absorbs the play between the two sections 22, 30 taken along this transverse direction Y.

The clearance between the two sections 22, 30 is thus absorbed.

User comfort is therefore improved.

Alternatively, the Y transverse direction is distinct from the Z elevation direction but is not perpendicular to the Z elevation direction.

Alternatively, the absorption device 60 comprises only one coil spring 62 to absorb the play between the sections 22, 30 taken along the direction in which it extends. Alternatively, the absorption device 60 comprises more than two for the same direction.

In a non-illustrated variant of the embodiment of FIGS. 2 to 4, the absorption device 60 has no blade 86 but then comprises at least one other helical spring extending in the transverse direction Y to elastically absorb a clearance between said sections 22, 30 taken in the transverse direction Y.

In this variant, the absorption device 60 comprises for example two other helical springs extending in the transverse direction Y. These two other helical springs and the base body 64 are then arranged in a manner similar to what has been described above. high for the first and second coil springs 62, 70.

In particular, the absorption device 60 then comprises another buffer for these two other coil springs. This other buffer is similar to buffer 66 described above.

In a non-illustrated variant of the embodiment of FIGS. 2 to 4, the first helical spring 62, and if necessary the second helical spring 70, does not extend(s) in the direction of elevation Z but extends( ent) in the transverse direction Y to elastically absorb a clearance between said sections 22, 30 taken in the transverse direction Y.

In this variant, the absorption device 60 then comprises, for example, a blade for elastically absorbing a clearance between said sections 22, 30 taken along the elevation direction Z. The blade is substantially similar to the blade 86 described previously.

The blade is then advantageously made of metal to improve the absorption of the forces exerted in the direction of elevation Z on the absorption device 60.

In yet another non-illustrated variant of the embodiment of Figures 2 to 4, the support profile 30 comprises at least one absorption device 60, as described above, fixed to the base 36 of the support profile 30.

Claims (10)

Slide rail (28) for a motor vehicle seat (10) comprising a support profile (30) and a movable profile (22), the movable profile (22) being movable in sliding with respect to the support profile (30) in one direction longitudinal (X), the support profile (30) and the movable profile (22) respectively comprising a base (44, 36);
characterized in that at least one of the mobile profile (22) and of the support profile (30) comprises at least one device for absorbing play (60) fixed to the base (44; 36) of said profile (22 30), the slack absorbing device (60) comprising at least a first helical spring (62) extending in an elevation direction (Z) to elastically absorb a slack between said profiles (22, 30 ) taken in the elevation direction (Z), or extending in a transverse direction (Y) to elastically absorb play between said sections (22, 30) taken in the transverse direction (Y), the direction of the elevation (Z) being perpendicular to the longitudinal direction (X), the transverse direction (Y) being perpendicular to the longitudinal direction (X) and being distinct from the elevation direction (Z). A slider (28) according to claim 1, wherein the slack absorbing device (60) comprises a second coil spring (70) extending substantially parallel to the first coil spring (62) for resiliently absorbing slack between said sections (22, 30) in the same direction as said first coil spring (62). A slider (28) according to any preceding claim, wherein the slack absorbing device (60) comprises a base body (64) carrying the or each coil spring (62, 70), the slack absorbing device game (60) being fixed to the base (44; 36) of said section (22; 30) via the base body (64). Slide (28) according to claim 3, wherein the absorption device (60) further comprises a buffer (66), the base body (64) of the absorption device (60) defining a receiving housing (72 ) in which the or each coil spring (62, 70) is received, the buffer (66) being fixed to the base body (64) by compressing the or each coil spring (62, 70) according to the direction in which it is extends. A slider (28) according to claim 4, wherein the buffer (66) comprises, for each coil spring (62, 70), a guide rod (76) surrounded by the coil spring (62, 70), the buffer (66) being movable relative to the base body (64) between an extended position, in which the buffer (66) is retained to the base body (64) by at least one clipping projection (82) and in which one end of each rod guide (76) is away from the base body (64), and a retracted position, in which the end of each guide rod (76) is in contact with the base body (64). A slider (28) according to claim 5, wherein the pad (66) includes at least one clip tab (80), the clip tab (80) having the clip projection (82). Slider (28) according to any one of Claims 5 or 6, in which the base body (64) comprises, for each helical spring (62, 70), a guide finger (74) extending into the housing of (72), the guide finger (74) being surrounded by the coil spring (62, 70), and, in the retracted position, the end of each guide rod (76) is in contact with one of the guide (74) of the base body (64). A slider (28) according to any preceding claim, wherein the slack absorbing device (60) further comprises a blade (86) or at least one other coil spring extending the other direction transverse (Y) and the elevation direction (Z) to elastically absorb a clearance between said sections taken along the other of the elevation direction (Z) and the transverse direction (Y). Slide (28) according to any one of the preceding claims, in which the movable profile (22) is movable in sliding relative to the support profile (30) in the longitudinal direction (X) over a maximum stroke greater than 250 mm. Motor vehicle seat (10) comprising a seat, the seat (14) being carried by the movable section (22) of a slide (28) according to any one of the preceding claims.