FR2869846A1 - Slider shoe for motor vehicle seat, has male section with deformation zones tending to be deformed before female section ruptures, when male section undergoes stress having component to move sections back and forth around supporting points - Google Patents

Abstract

The shoe has male and female sections (6, 7) mounted to slide with respect to each other. The male section has deformation zones tending to be deformed before the rupture of the female section. The zones are deformed, when the male section undergoes a stress having a component tending to make the male and female sections to move back and forth with respect to each other around supporting points (18, 19). An independent claim is also included for a seat of a motor vehicle.

Description

SLIDER FOR SEAT OF VEHICLE AND SEAT COMPRISING A

Such slip

  The present invention relates to the rails for vehicle seats and seats with such rails.

  More particularly, the invention relates to a slide for a vehicle seat comprising male and female sections. For example, the female section is fixed and secured to the vehicle, while the male section is movable and secured to the seat. These profiles are engaged in each other on a so-called engagement range. They are slidably mounted relative to each other in a so-called longitudinal direction, in opposite first and second sliding directions corresponding to seat movements forwards and backwards. The male and female profiles slide relative to each other but this sliding can be locked, with a lock, in any adjustment position between two extreme adjustment positions: a so-called adjustment position before and a adjustment position called all rear. For example, in the all before position, the engagement range extends a minimum distance and in the all-rear position, the engagement range extends over a maximum distance.

  The male and female sections cooperate for example with each other through gutters defining, in the longitudinal direction, ball paths. At least two balls, respectively substantially one towards the rear and the other towards the front of the engagement range, define support points at which the first and second profiles cooperate with each other. 'other.

  Document FR-A-2 797 234, already known, including slides of this type.

  Such slides are entirely satisfactory, however, as illustrated in Figures 3 and 4, it may happen that the slide 5 is in position before and the female section 7 is anchored to the floor 4 at two anchor points 32 located either side of the rear end of the male section 6 and the corresponding support point 19. Then, in case of dynamic shock, and in particular if a force F solicits the male section 6, it can occur a vertical component f tending to tilt this male section 6, relative to the female section 7, around the point of support 18, located on the female section 7, close in its front end. The rear end of the male section 6 then exerts a stress on the female section 7 which can lead to the rupture 21 thereof, in particular from some of its notches 12 adjustment (see Figure 4).

  The present invention is intended to overcome, at least partially, this disadvantage.

  For this purpose, according to the invention, a slide of the kind in question is characterized in that at least the male section comprises at least one deformation zone, perforated, tending to deform, before a rupture of the female section, when the male section is biased having a component tending to tilt the male and female sections relative to each other substantially around one of the points of support.

  Thanks to these provisions, the deformation zone absorbs, by deforming, at least a portion of the energy corresponding to the stress. In some cases, it avoids a breakage of the female section that would lead to a separation of the seat from the floor of the vehicle.

  In certain embodiments of the invention, one or more of the following provisions may also be used: the deformation zone is located over a length corresponding to a fraction of the corresponding distance at the engagement range, the deformation zone is located near the rear end of the male section; - The male section comprises, extending in the longitudinal direction, a horizontal core and two lateral vertical wings; the deformation zone comprises a vertical slot, extending from the horizontal core, on each of the vertical wings, and the core comprises at least one cutout extending over at least a part of the distance joining the two slots vertical; - The horizontal core comprises two parts each located respectively on either side of the vertical slots with a bridge connecting these two parts; - At least one slot ends, at an end located towards the female section, by a rounded cutout; several slots are distributed along the longitudinal direction; - a seat attachment point is located at a distance of between 5 and 30 mm from the deformation zone; and - each slot of the deformation zone extends over substantially at least 50% of the vertical dimension of the vertical wings.

  According to another aspect, the invention relates to a vehicle seat comprising a seat slidably mounted longitudinally by means of at least one slide as defined above.

  Other features and advantages of the invention will appear on reading the following description of several of its embodiments, given by way of non-limiting examples, with reference to the accompanying drawings in which: FIG. 1 is a view schematic of a vehicle seat according to the invention equipped with two slides also according to the invention, - Figure 2a is a perspective view showing the rails of the seat of Figure 1, Figure 2b shows schematically one of of these slides, in cross section, - Figure 3 shows schematically, seen from the side, a slide of the prior art, - Figure 4 shows schematically in perspective a female section of the slide shown in Figure 3, after a shock FIGS. 5a to 5g schematically represent examples of zones of deformation of a male slider section according to the invention, FIGS. 6a and 6b show schematically A portion of a male section of an exemplary embodiment of a slideway according to the invention, viewed from the side and seen from above, is shown in FIG. 7 schematically, seen from the side, a slide corresponding to FIG. embodiment already illustrated in Figures 6a and 6b; Figure 8 is a diagrammatic perspective view of the male section of Figures 6a and 6b; FIGS. 9a to 9f show, in a view similar to that of FIG. 6a, zones of deformation according to different variants of the embodiment illustrated by FIGS. 6a and 6b; FIGS. 10a to 10f represent, in a manner analogous to FIG. 6b, respectively the zones of deformation of the sections shown in FIGS. 9a to 9f; FIG. 11 corresponds to a diagram of the forces exerted on the fixed profile, over time, when a similar stress is applied on the one hand to a slider of the prior art and on the other hand to a slider corresponding to representations of Figures 6a and 6b; - Figures 12a and 12b show schematically, from the side, respectively a slide corresponding to that of Figures 6a and 6b, firstly before the request and secondly after solicitation; 13 shows, in a view similar to that of Figure 8, a male section of another embodiment of a slide according to the invention; and FIGS. 14a and 14b show, in a similar manner to FIGS. 6a and 6b, a deformation zone according to another variant of the embodiment shown in FIGS. 6a and 6b. In the different figures, the same references designate identical or similar elements.

  Figure 1 shows an exemplary embodiment of a seat according to the present invention. This includes a seat 1 front of a vehicle, which has a backrest 2 pivotally mounted on a seat 3, itself attached to the floor 4 of the vehicle through two parallel rails 5 which s' extend each in a so-called longitudinal direction, allowing a movement of the entire seat 1 forward and backward.

  Each slide 5 comprises, on the one hand, a male section 6 which is secured to the seat 3 of the seat and, on the other hand, a female section 7 secured to the floor 4 of the vehicle. The male section 6 is slidably mounted in the female section 7 parallel to the longitudinal direction. The seat 3 is linked, at the front attachment points 22a and 22b rear, to the male section 6 by front feet 24a and rear 24b. The male 6 and female 7 sections extend along the longitudinal direction between a front end 33 and a rear end 34.

  According to the exemplary embodiment described here, the male and female sections 6, 7 of each slide 5 delimit between them, as shown in FIG. 2b, a hollow internal space 8. In this space 8, is housed a slide lock 17 which, in the locked position, blocks the movement of the male section 6 relative to the female section 7.

  In this example, the female section 7 of each of the two slides 5, has a U-shaped section open upwards, with a horizontal bottom 9 and two vertical wings 10 which extend inwards and downwards. by two reentrant troughs 11, which extend to a lower edge forming notches 12 downwards.

  Furthermore, the male section 6 of each of the slides 5 has a downwardly open "U" -shaped section, which comprises an upper horizontal core 13 and two vertical wings 14 arranged between the reentrant troughs 11 of the female section 7. The lower ends of the vertical flanges 14 extend upwardly and outwardly by two external troughs 15 which penetrate the reentrant troughs 11 of the female section 7. Balls 16 are interposed between the male 6 and female 7, respectively to above and below each outer trough 15.

  As represented in FIGS. 5a to 5g, the vertical wings 14 of the male profile 6 each comprise, near their rear end, a deformation zone 23. This deformation zone 23 corresponds to one or more cutouts or openings made in the wings vertical 14. These may be circular cutouts (Figures 5a, 5c), oblong cutouts (Figures 5b, 5d), rectangular cutouts (Figures 5e, 5f), etc. It may be spaced cuts, in the longitudinal direction, with a fixed or variable pitch. The dimensions of the blanks may vary from one blank to another on the same vertical flange 14. Some blanks may extend from the rear end of the vertical flanges 14 (FIGS. 5a to 5e). The deformation zone 23 may be between the rear end of the male section 6 and the rear attachment point 22b of the rear leg 24b of the seat 1 on the male section 6 (Figures 5a, 5b, 5c, 5d and 5g). The rear fixing point 22b may also be in the deformation zone 23 (FIGS. 5e and 5f).

  Similar geometries to those described above may be contemplated with respect to a seat belt anchor point instead of, or in addition to, the rear attachment point 22b.

  Another variant of the deformation zone 23 is illustrated in FIGS. 6a, 6b, 7 and 8. According to this variant, the deformation zone 23 comprises a vertical slot 25. This vertical slot 25 extends from the horizontal web 13 of the male section 6, on each of the lateral wings 14, in the direction of the female section 7. This vertical slot 25 ends, at its end located towards the female section 7, by a rounded cutout 26 (FIG. 6a) . The horizontal core 13 comprises a transverse cutout 27, between the two vertical slots 25 of the wings 14 of a male section 6. A bridge 28 connects the two parts of the horizontal core 13, located on either side of the cross cut 27 (Figure 6b).

  As shown in FIG. 7, in the very forward position, the deformation zone 23 is located, along the longitudinal direction, between the rear fixing point 22b and the rear bearing point 19. Thus, in the event of impact dynamic, if a force F solicits the male section 6 and / or a vertical component f tends to tilt the male section 6 relative to the female section 7 around the bearing point before 18, the slots 25 will tend to away, by rotation around the rounded cutouts 26 parts of the male section 6 located on either side of the cutout 27. The bridge 28 is deformed. Thus, even if the female section 7 deforms by lifting between the two anchor points 32, its breakage can be avoided.

  Many variations can be provided in the embodiment described above. For example, the deformation zone 23 may be devoid of bridge 28 (see FIGS. 5g, 9a and 10a). The deformation zone 23 may be devoid of rounded cutout 26 (see FIGS. 9b, 10b, 9c and 10c). The deformation zone 23 may be placed at a greater or lesser distance from the rear fixing point 22b (see FIGS. 9d, 10d, 9f and 10f). Thus, the deformation zone 23 may extend, for example, over a zone 5 to 30 mm apart from the rear fixing point 22b. The deformation zone 23 may comprise a plurality of vertical slots 25 (see FIG. 9e). The vertical slit (s) 25 of the deformation zone 23 may extend over a greater or lesser extent of the vertical dimension of the lateral wings 14 (see FIG. 9d and FIG. 9f). Thus, in FIG. 9f, the vertical slot 25 extends over substantially 50% of the vertical dimension of the lateral wings 14.

  FIG. 11 represents the force E during a calculated tensile test representative of a dynamic shock, in kN, on the male section 6, in the vicinity of the rear fixing point 22b, as a function of the time t, respectively for a ) a slide of the prior art such as that shown in Figures 3 and 4 and for b) a slide such as that shown in Figures 6a and 6b.

  Thus, it can be seen in this FIG. 11 that the maximum force E, with a slider of the prior art, is 19.21 kN, while it is 20.09 kN for a slider according to the present invention. invention. The maximum force E that can be absorbed by the slide according to the invention is therefore greater than that obtained with a slider of the prior art.

  In addition, as illustrated by FIGS. 12a and 12b, after the tensile test, the male 6 and female 7 sections have been deformed, but thanks to the deformation of the male section 6 at the level of the deformation zone 23, the male section 6 has remained engaged in the female section 7 (see Figure 12b) without breaking the female section 7.

  Of course, many variants and many embodiments can be made without departing from the scope of the invention. Thus, as shown by way of example in FIG. 13, the male section 6 may have a cross-section in the form of "h" and a deformation zone 23 may be provided at the end of the male section 6, in a zone vertical wings 14 located below the horizontal core 13. This deformation zone 23 may comprise a horizontal slot 29 opening onto a vertical slot 30.

  According to another variant, illustrated by Figures 14a and 14b, the slots 25 of the deformation zone 23 are offset longitudinally. A cutout 27 extends each of the slots 25, on the horizontal core 13, substantially perpendicular to the longitudinal direction. The cutouts 27 extend over a sufficient portion of the width of the horizontal web 13 to provide a bridge 28 between them. During an impact, the cutouts 27 move away from each other, the bridge 28 deforms without breaking.

  Depending on the type of application, the deformation zone may be on one and / or the other of the male 6 and female 7 sections, one of which may be mobile and the other fixed, that is to say say in particular inverted compared to what has been described by way of example above. One or more deformation zones may be provided along the length of the movable profile and / or the fixed section. The deformation zone 23 may be provided at the rear, at the front or at any other place along the movable section and / or the fixed section.

Claims (10)

  1. Slide for a vehicle seat, comprising male (6) and female (7) sections intended to be secured one, with the seat (1) and the other, with the vehicle, these male profiles (6) and female (7) being engaged one into the other on a range of engagement and being slidably mounted relative to each other in a so-called longitudinal direction, in opposite first and second sliding directions respectively corresponding to movements of the seat (1) forwards and backwards, between two adjustment positions, a so-called "all-for-all" adjustment position and a so-called rearmost adjustment position, the male (6) and female (7) sections. cooperating with each other at at least two bearing points (18,19) located respectively substantially one towards the rear and the other towards the front of the engagement range, characterized in that the male section (6) comprises at least one deformed zone (23), perforated, tending to before forming a rupture of the female section (7), when the male section (6) undergoes a stressing having a component tending to tilt the male (6) and female (7) sections relative to each other substantially around one (18) of the points of support (18,19).   2. Slide according to claim 1, wherein the deformation zone (23) is located along a length corresponding to a fraction of the distance corresponding to the engagement range.   3. Slide according to one of the claims   previous, wherein the deformation zone (23) is located near the rear end of the male section (6).   4. Slide according to one of the preceding claims, wherein the male section (6) comprises, extending in the longitudinal direction, a horizontal web (13) and two vertical wings (14) side, the deformation zone (23). ) having a vertical slot (25), extending from the horizontal web (13), on each of the vertical wings (14) and the horizontal web (13) has at least one cutout (27) extending on at least a part of the distance joining the two vertical slots (25).   5. Slide according to claim 3, wherein the horizontal web (13) comprises two parts each located respectively on either side of the vertical slots (25), with a bridge (28) connecting these two parts.   6. Slide according to one of claims 4 and 5, wherein at least one slot (25) terminates at an end facing the female section (7) by a rounded cutout (26).   7. Slide according to one of claims 4 to 6,   having a plurality of slots (25) distributed along the longitudinal direction.   Slide according to one of claims 4 to 7,   wherein each slot (25) of the deformation zone (23) extends over substantially at least 50% of the vertical dimension of the vertical wings (14).   Slide according to one of the claims   with a seat attachment point (22b) at a distance of between 5 and 30 mm from the deformation zone (23).   10. Motor vehicle seat comprising a slide (5) according to one of the preceding claims.