FR2894889A1

FR2894889A1 - Seat track for motor vehicle, has retaining mechanism guiding displacement of locking element from locked position till safety position in which displacement of locking element with respect to fixed profile is prohibited

Info

Publication number: FR2894889A1
Application number: FR0513077A
Authority: FR
Inventors: Rene Rohee; Jean Marie Fretel
Original assignee: Faurecia Sieges dAutomobile SAS
Current assignee: Faurecia Sieges dAutomobile SAS
Priority date: 2005-12-21
Filing date: 2005-12-21
Publication date: 2007-06-22
Anticipated expiration: 2025-12-21
Also published as: FR2894889B1; DE102006060789A1; DE102006060789B4; JP2007168779A; JP4354481B2

Abstract

The track has a locking element (17) mounted on a moving profile (6). The locking element is movable with respect to the moving profile along a transversal direction distinct from a locking direction between a locked position and a released position. A retaining mechanism guides the displacement of the locking element based on a sliding direction with respect to the moving profile from the locked position till a safety position in which the displacement of the element with respect to a fixed profile is prohibited.

Description

GLISSIERE DE SIEGE DE VEHICULE AUTOMOBILE, SIEGE DE VEHICULE ET VEHICULEAUTOMOTIVE VEHICLE SEAT SLIDER, VEHICLE SEAT AND VEHICLE

AUTOMOBILE MUNIS DUNE TELLE GLISSIERE AUTOMOTIVE MUNIS DUNE SUELLE GLISSIERE

La presente invention est relative aux glissieres de siege de vehicule automobile, aux sieges de vehicule et aux vehicules automobiles munis de telles glissieres. Plus particulierement, 1'invention se rapporte principalement a une glissiere de siege de vehicule automobile comprenant un premier profile et un deuxieme profile, lesdits profiles etant pour 1'un destine a titre fixe a un chassis de vehicule automobile, et pour 1'autre destine a titre rapporte a un element de siege de vehicule recevant uri passager, le premier profile etant monte coulissant par rapport au deuxieme profile le long d'une direction de coulissement, ladite glissiere comprenant en outre un element de verrouillage monte sur le premier profile, ledit element de verrouillage etant mobile par rapport au premier profile selon une direction transversale distincte de la direction de coulissement entre une position verrouillee dans laquelle it coopere a la fois avec les premier et deuxieme profiles pour empecher un deplacement relatif des profiles le long de la direction de coulissement, et une position deverrouillee dans laquelle it ne coopere pas avec le deuxieme profile pour autoriser ce deplacement relatif. Un tel element de verrouillage etant utilise pour regler la position du siege dans 1'habitacle, it est generalement en position verrouillee Tors d'un choc. L'element de verrouillage sert alors a maintenir la position du siege dans 1'habitacle pour eviter que 1'occupant ne soit projete vers 1'avant (ou vers 1'arriere, selon la direction du choc) avec le siege. Toutefois, si cette retenue est trop violente, it peut egalement en resulter des lesions pour 1'occupant, par exemple du fait de la retenue violente. Voire, la glissiere cedant finalement a cause du choc, 1'occupant n'est alors plus du tout retenu et peut etre sujet a de nouveaux dommages. Pour pallier ces inconvenients, it a ete prevu dans FR 2 732 279 d'autoriser un Leger deplacement du profile mobile par rapport au profile fixe en cas de choc. Un tel deplacement n'est autorise qu'en cas de choc, lorsqu'une energie suffisante est communiquee a la glissiere pour induire une deformation locale dissipatrice d'energie. Une telle realisation, tout a fait satisfaisante, peut encore etre amelioree. En effet, clans FR 2 732 279, cette deformation etant autorisee a un endroit servant egalement pour le guidage de 1'element de verrouillage, it faut prevoir un certain jeu de 1'element de verrouillage qui corresponde a 1'envergure du deplacement relatif des profiles. Ce jeu est necessairement minime pour permettre de conserver un verrouillage satisfaisant. La presente invention a notamment pour but de permettre un deplacement d'envergure du profile mobile par rapport au profile fixe en cas de choc, tout en ne portant pas atteinte au fonctionnement normal de la glissiere. A cet effet, selon 1'invention, une glissiere du genre en question est caracterisee en ce que 1'element de verrouillage est monte deplacable selon la direction de coulissement par rapport au premier profile depuis sa position verrouillee jusqu'a une position de securite dans laquelle un deplacement de 1'element de verrouillage par rapport au deuxieme profile dans la direction transversale est interdit. Grace a ces dispositions, on obtient une tres bonne 30 retenue de 1'occupant en cas de choc. Dans des modes de realisation preferes de 1'invention, on peut eventuellement avoir recours en outre a 1'une et/ou a 1'autre des dispositions suivantes : - la glissiere comprend un mecanisme de retenue 35 adapte pour interdire un mouvement relatif de 1'element de verrouillage et du premier profile dans la direction de coulissement en fonctionnement normal de la glissiere, et pour autoriser ledit mouvement relatif lors d'un choc ; - le mecanisme de retenue de 1'element de verrouillage est adapte pour guider le deplacement de 1'element de verrouillage par rapport au premier profile dans la direction transversale, le deplacement de 1'element de verrouillage par rapport au premier profile dans la direction de coulissement etant autorise, en cas de choc, par dissipation d'energie du choc au niveau du mecanisme de retenue ; - le mecanisme de retenue comprend une fente menagee dans le profile mobile et une portion d'attache menagee clans 1'element de verrouillage, ladite portion d'attache coulissant clans la fente dans la direction transversale, ladite portion d'attache etant montee separable sur le premier profile, de sorte que, lors d'un choc, le mouvement relatif dans la direction de coulissement soit autorise entre le premier profile d'une part et le deuxieme profile et 1'element de verrouillage solidaires entre eux d'autre part ; - 1a portion d'attache comprend une portion secable interdisant le mouvement relatif dans la direction de coulissement entre 1'element de verrouillage et le premier profile, ladite portion secable et.ant adaptee pour se rompre lors du choc vehicule ; - le mecanisme de retenue comporte une portion de deformation formee dans le premier profile et comprenant une butee, le mecanisme de retenue comporte un element complementalre de la portion de deformation, adapte pour deformer la portion de deformation en se cleplagant dans la direction de coulissement dans la portion de deformation jusqu' a ladite but6e, et ledit element de verrouillage coopere avec ledit element complementaire pour retenir ledit element complementaire et freiner le premier profile lors dudit mouvement relatif entre 1'element de verrouillage et le premier profile clans la direction de coulissement jusqu'a ce que ledit element complementaire atteigne la butee dans ladite posi-:ion de securite de 1'element de verrouillage ; - la portion de deformation comprend au moins une fente menagee clans le profile de reception, et 1'element complementaire comprend au moins une goupille inseree transversalement dans le profile de reception, dans ladite fente, au contact de 1'element de verrouillage ; - le mecanisme de retenue est symetrique par rapport a 1'element de verrouillage, pour freiner ledit mouvement relatif de 1'element de verrouillage et du premier profile aussi bien dans les deux sens opposes de la direction de coulissement ; - le premier profile comprend une premiere et une deuxieme ailes paralleles a la direction de coulissement, la premiere aile comprenant ledit element de verrouillage et ledit mecanisme de retenue et la deuxieme aile comprenant un element de verrouillage et un mecanisme similaires, respectivement, audit element de verrouillage et audit mecanisme de retenue de la premiere aile ; - le premier profile comprend un profil dote d'au moins une surface de butee et d'au moins une ouverture espacee de la surface de butee le long de la direction de coulissement, ladite ouverture etant situee en regard de 1'element de verrouillage dans la position verrouillee, 1'element de verrouillage est monte sur le premier profile de sorte qu'il s'insere dans ladite ouverture au cours de son mouvement depuis sa position verrouillee vers sa position deverrouillee selon la direction transversale, ledit element de verrouillage etant mobile par rapport au premier profile dans la direction de coulissemeno jusqu'a la position de securi_te dans laquelle 1'element de verrouillage n'est plus en regard de 1'ouverture et est en regard de la surface de butee, pour interdire le deplacement de 1'element de verrouillage par rapport au premier profile dans la direction transversale. Selon un autre aspect, 1'invention se rapporte a un siege de vehicule comportant un element de siege de vehicule actapte pour recevoir un passager, et une telle glissiere, ledit element de siege etant monte sur le premier profile. D'autres caracteristiques et avantages de 1'invention apparaitront au cours de la description suivante d'une de ses formes de realisation, donnee a titre d'exemple non limitatif, en regard des dessins joints. The present invention relates to motor vehicle seat slides, vehicle seats and motor vehicles equipped with such slides. More particularly, the invention relates mainly to a motor vehicle seat slider comprising a first profile and a second profile, said profiles being intended for one fixed purpose to a motor vehicle chassis, and for the other intended in relation to a passenger vehicle seat member, the first profile being slidably mounted relative to the second profile along a sliding direction, said slider further comprising a locking member mounted on the first profile, said locking member being movable relative to the first profile in a transverse direction distinct from the sliding direction between a locked position in which it cooperates with both the first and second profiles to prevent relative displacement of the profiles along the direction of sliding, and an unlocked position in which it does not cooperate with the second profile for at torise this relative displacement. Since such a locking element is used to adjust the seat position in the passenger compartment, it is generally in the locked position during an impact. The locking member then serves to maintain the seat position in the passenger compartment to prevent the occupant from being projected forward (or rearward, in the direction of impact) with the seat. However, if this restraint is too violent, it may also result in injury to the occupier, for example because of the violent restraint. If the slide finally gives way because of the shock, then the occupant is not retained at all and may be subject to further damage. To overcome these drawbacks, it has been provided in FR 2 732 279 to allow a slight displacement of the movable profile relative to the fixed profile in case of impact. Such displacement is allowed only in case of shock, when sufficient energy is communicated to the slide to induce a local deformation dissipating energy. Such a realization, quite satisfactory, can still be improved. In fact, since this deformation is authorized at a location also used for guiding the locking element, it is necessary to provide a certain clearance of the locking element which corresponds to the range of the relative displacement of the locking elements. profiles. This game is necessarily minimal to allow to keep a satisfactory lock. The present invention is intended in particular to allow a spread of the mobile profile with respect to the fixed profile profile in case of impact, while not affecting the normal operation of the slide. For this purpose, according to the invention, a slide of the kind in question is characterized in that the locking element is mounted movable in the direction of sliding relative to the first profile from its locked position to a safety position in which a displacement of the locking element with respect to the second profile in the transverse direction is prohibited. Thanks to these provisions, a very good retention of the occupant in case of shock is obtained. In preferred embodiments of the invention, one or more of the following may also be used: - the slide includes a retaining mechanism 35 adapted to prohibit a relative movement of locking element and the first profile in the sliding direction in normal operation of the slide, and to allow said relative movement during an impact; the locking mechanism of the locking element is adapted to guide the displacement of the locking element with respect to the first profile in the transverse direction, the displacement of the locking element with respect to the first profile in the direction of sliding being authorized, in the event of shock, by energy dissipation of the shock at the level of the retaining mechanism; the retaining mechanism comprises a slot in the movable profile and a fastening portion in the locking element, said sliding fastening portion in the slot in the transverse direction, said fastening portion being mounted separably on the first profile, so that, during an impact, the relative movement in the sliding direction is allowed between the first profile on the one hand and the second profile and the locking element secured to each other on the other hand; The attachment portion comprises a securing portion preventing relative movement in the sliding direction between the locking element and the first profile, said securing portion being adapted to break during the vehicle impact; the restraining mechanism comprises a deformation portion formed in the first profile and comprising a stop, the retaining mechanism comprises a complementary element of the deflection portion, adapted to deform the deformation portion by pivoting in the direction of sliding in the deformation portion up to said stop, and said locking member cooperating with said complementary member to retain said complementary member and braking the first profile during said relative movement between the locking member and the first profile in the sliding direction until said complementary element reaches the stop in said security position of the locking element; the deformation portion comprises at least one slit set in the receiving profile, and the complementary element comprises at least one pin inserted transversely into the receiving profile, into said slot, in contact with the locking element; the retaining mechanism is symmetrical with respect to the locking element, for braking said relative movement of the locking element and the first profile both in the two opposite directions of the sliding direction; the first profile comprises a first and a second wing parallel to the direction of sliding, the first wing comprising said locking element and said retaining mechanism and the second wing comprising a locking element and a mechanism similar to, respectively, said element of locking and said first wing restraint mechanism; the first profile comprises a profile provided with at least one abutment surface and at least one spaced opening of the abutment surface along the direction of sliding, said opening being located opposite the locking element in the locked position, the locking element is mounted on the first profile so that it fits into said opening during its movement from its locked position to its unlocked position in the transverse direction, said locking element being movable relative to the first profile in the sliding direction to the securi_te position in which the locking element is no longer opposite the opening and is opposite the stop surface, to prohibit the movement of 1 locking element with respect to the first profile in the transverse direction. According to another aspect, the invention relates to a vehicle seat comprising a vehicle seat element actapte to receive a passenger, and such a slide, said seat element being mounted on the first profile. Other features and advantages of the invention will become apparent from the following description of one of its embodiments, given by way of non-limiting example, with reference to the accompanying drawings.

Sur les dessins : - la figure 1 est une vue schematique de cote d'un siege de vehicule, - la figure 2 est une vue schematique de face en coupe le long de la ligne II-II de la figure 3, d'une glissiere equipant le siege de la figure 1 dans une position verrouillee du mecanisme de verrouillage, - la figure 3 est une vue schematique de cote en coupe le long de la ligne III-III de la figure 2, de la glissiere de la figure 2, - la figure 4 est une vue schematique de face en coupe le long de la ligne IV-IV de la figure 3, dans un plan parallele au plan de coupe de la figure 2, - la figure 5 est une vue schematique de face similaire a la figure 2, dans une position deverrouillee du 30 mecanisme de verrouillage, - la figure 6 est une vue correspondant a la figure 3 clans une position de securite de mecanisme de verrouillage, et - la figure 7 est une vue schematique de dessous 35 en coupe le long de la ligne VII-VII de la figure 2. In the drawings: FIG. 1 is a schematic side view of a vehicle seat; FIG. 2 is a schematic front view in section along the line II-II of FIG. providing the seat of Figure 1 in a locked position of the locking mechanism, - Figure 3 is a schematic sectional side view along the line III-III of Figure 2, the slide of Figure 2, - FIG. 4 is a schematic front view in section along the line IV-IV of FIG. 3, in a plane parallel to the section plane of FIG. 2; FIG. 5 is a schematic front view similar to FIG. FIG. 6 is a view corresponding to FIG. 3 in a locking mechanism security position, and FIG. 7 is a schematic sectional view of the locking mechanism, FIG. along the line VII-VII of Figure 2.

Sur les differentes figures, les memes references designent des elements identiques ou similaires. La figure 1 represente un siege 1 de vehicule automobile comportant une assise 2 et un dossier 3 de reception d'un occupant. Un de ces elements de siege, par exemple 1'assise 2 comme represente sur la figure 1, est relie au chassis du vehicule automobile par 1'intermediaire d'une glissiere 4 par exemple montee sur un plancher 5 du vehicule. On the different figures, the same references designate identical or similar elements. FIG. 1 shows a seat 1 of a motor vehicle comprising a seat 2 and a seat 3 for receiving an occupant. One of these seat elements, for example the seat 2 as shown in Figure 1, is connected to the chassis of the motor vehicle through a slide 4 for example mounted on a floor 5 of the vehicle.

Cette glissiere 4 peut par exemple permettre de regler la position du siege 1 par rapport au plancher 5 de vehicule, le long d'une direction longitudinale X, en deplagant le siege 1 vers 1'avant ou vers .1'arriere le long de la direction X. Les termes vers 1' avant et o vers 1'arriere >> se rapportent au deplacement relatif du siege 1 et du plancher 5, independamment de 1'orientation du siege 1 dans le vehicule. Un exemple de glissiere 4 montee dans le siege 1 est represente sur la figure 2. La glissiere 4 comporte un premier et un deuxieme profiles. Le profile mobile 6, dans 1'exemple de realisation presente, est fixe a 1'element de siege a deplacer (1'assise 2). Ce profile mobile est ici un profile male comprenant une premiere et une deuxieme ailes 7a, 7b s'etendant parallelement entre elles le long de la direction de coulissement X et separees dans une partie superieure par une embase 8 et reliees entre elles, dans leur partie inferieure, par des saillies 9a, 9b formees par exemple par emboutissage respectif des ailes 7a, 7b. Des saillies 9a, 9b peuvent etre reliees 1'une a 1'autre par exemple par soudure, pour former un profil en caisson rigide du profile mobile. Elles peuvent etre alternativement realisees dans le plan de coupe de la figure 2, ou a d'autres emplacements adaptes le long du profile mobile 6, comme represente. This slide 4 may, for example, make it possible to adjust the position of the seat 1 with respect to the floor 5 of the vehicle, along a longitudinal direction X, by moving the seat 1 forwards or backwards along the direction X. The terms forward and backwards refer to the relative displacement of seat 1 and floor 5, regardless of the orientation of seat 1 in the vehicle. An example of slide 4 mounted in the seat 1 is shown in Figure 2. The slide 4 comprises a first and a second profiles. The movable profile 6, in the present embodiment, is fixed to the seat element to be displaced (seat 2). This mobile profile is here a male profile comprising a first and a second wings 7a, 7b extending parallel to each other along the direction of sliding X and separated in an upper part by a base 8 and interconnected, in their part lower, by projections 9a, 9b formed for example by respective stamping wings 7a, 7b. Projections 9a, 9b may be connected to each other, for example by welding, to form a rigid box profile of the movable profile. They may alternatively be made in the sectional plane of FIG. 2, or at other suitable locations along the movable profile 6, as shown.

Les ailes 7a, 7b sont completees chacune par un rabat 10a, 10b respectif s'etendant vers 1'exterieur et vers le haut depuis 1'extremite inferieure des ailes 7a, 7b. Ces rabats comportent dans leur partie inferieure chacun une serie d'ouvertures 11a, llb, espacees entre elles par des surfaces de butee pour un element de verrouillage 17. Le profile mobile 6 est complementaire d'un profile fixe 12 monte par exemple sur le plancher 5 du vehicule. Dans 1'exemple presente, le profile fixe 12 est un profile femelle dans lequel coulisse le profile mobile 6. I1 comporte une base 13 horizontale de part et d'autre de laquelle s'etendent deux ailes 14a, 14b verticales vers le haut, ces ailes etant chacune completee par une auge 15a, 15b respective rentrante orientee vers 1'interieur et vers le bas. Dar.s 1'etat assemble de la glissiere representee sur la figure 2, le rabat l0a du profile mobile est insere entre 1'aile 14a et 1'auge rentrante 15a du profile fixe, pour definir avec celle-ci deux chemins de bille 16 dans lesquels sont inseres des roulements a bille assistant le deplacement de coulissement du profile mobile 6 par rapport au profile fixe 12. Une geometrie similaire se retrouve de 1'autre cote, ou le rabat 10b est insere entre 1'aile verticale 14b et 1'auge rentrante 15b du profile fixe. Un exemple de systeme de verrouillage est maintenant decrit pour la glissiere de la figure 2. Dans cet exemple de realisation, le profile mobile 6 sert de profile de reception, car it regoit un element de verrouillage 17 qui peut cooperer avec le profile fixe 12 dans une position verrouillee de 1'element de verrouillage, representee sur la figure 2, pour verrouiller la glissiere. Alternativement, 1'element de verrouillage peut ne pas cooperer avec le profile fixe dans une position deverrouillee de 1'element de verrouillage (figure 5). Dans cette position deverrouillee, un deplacement du siege 1 par rapport au plancher 5 est autorise clans la direction de coulissement. Toutefois, on pourrait prevoir que, clans le cadre de 1'invention, ce soit le profile fixe 12 qui soit le prcfile de reception de 1'element de verrouillage 17. The wings 7a, 7b are each completed by a respective flap 10a, 10b extending outward and upward from the lower end of the wings 7a, 7b. These flaps comprise in their lower part each a series of openings 11a, 11b spaced between them by stop surfaces for a locking member 17. The movable profile 6 is complementary to a fixed profile 12 mounts for example on the floor 5 of the vehicle. In the present example, the fixed profile 12 is a female profile in which the movable profile 6 slides. I1 has a horizontal base 13 on either side of which two wings 14a, 14b extend upwards vertically. wings each being completed by a respective trough 15a, 15b reentrant oriented inwards and downwards. In the assembled state of the slide shown in FIG. 2, the flap 10a of the movable profile is inserted between the wing 14a and the re-entrant algee 15a of the fixed profile, to define with it two ball paths. in which are inserted ball bearings assisting the sliding displacement of the movable profile 6 relative to the fixed profile 12. A similar geometry is found on the other side, or the flap 10b is inserted between the vertical wing 14b and 1 ' ingoing trough 15b of the fixed profile. An example of a locking system is now described for the slide of FIG. 2. In this exemplary embodiment, the mobile profile 6 serves as a reception profile, since it receives a locking element 17 which can cooperate with the fixed profile 12 in FIG. a locked position of the locking element, shown in Figure 2, to lock the slide. Alternatively, the locking element may not cooperate with the fixed profile in an unlocked position of the locking element (FIG. 5). In this unlocked position, a displacement of the seat 1 with respect to the floor 5 is allowed in the direction of sliding. However, it could be expected that within the scope of the invention, it is the fixed profile 12 which is the receiving prcfile of the locking element 17.

Dans 1'exemple presente, 1'element de verrouillage 17 se presente sensiblement sous la forme d'une plaque de tole s'etendant parallelement au profile mobile. Comme cela est principalement visible sur la figure 3, it comporte une portion superieure 18 formant crochet et une portion inferieure 19 comportant une pluralite de dents 20 adaptees pour cooperer, dans la position verrouillee du systeme de verrouillage, avec une portion dentee 21 correspondante du profile fixe (cf. figure 2). La glissiere comporte un mecanisme de retenue pour retenir 1'element de verrouillage sur le profile mobile, et guider celui-ci lors de son deplacement entre ses positions verrouillee et deverrouillee. A ce titre, 1'element de verrouillage 17 est monte sur 1'aile 7a, 7b du profile mobile par 1'intermediaire d'une portion d'attache 22 realisee sur la face arriere de 1'element de verrouillage opposee a la face de celui-ci comportant a la fois la portion superieure 18 formant crochet et les dents 20. La portion d'attache 22 coulisse librement dans une direction transversale dans une fente 23 de guidage du profile mobile entre une position verrouillee dans laquelle la portion d'attache 22 se situe dans une zone superieure de la fente de guidage 23 (figure 2) et une position deverrouillee (figure 5) dans laquelle la portion d'attache 22 se situe dans une zone inferieure de la fente 23. In the present example, the locking member 17 is substantially in the form of a sheet metal plate extending parallel to the movable profile. As is mainly visible in FIG. 3, it comprises an upper portion 18 forming a hook and a lower portion 19 having a plurality of teeth 20 adapted to cooperate, in the locked position of the locking system, with a correspondingly shaped portion 21 of the profile. fixed (see Figure 2). The slide has a retaining mechanism for retaining the locking element on the movable profile and guiding the latter as it moves between its locked and unlocked positions. In this respect, the locking element 17 is mounted on the wing 7a, 7b of the movable profile via a fastening portion 22 formed on the rear face of the locking element opposite the front face. it comprising both the upper hook portion 18 and the teeth 20. The attachment portion 22 slides freely in a transverse direction in a slot 23 for guiding the movable profile between a locked position in which the attachment portion 22 is located in an upper zone of the guide slot 23 (FIG. 2) and an unlocked position (FIG. 5) in which the fastening portion 22 is located in a lower zone of the slot 23.

En outre, 1'element de verrouillage peut se separer du profile de reception, par rupture d'une portion secable entre la portion d'attache 22 et la plaque de tole lorsqu'une energie suffisante lui est impartie. Une telle portion secable est realisee de toute fagon appropriee par exemple par amincissement local entre la plaque de tole et la portion d'attache. L'element de verrouillage 17 coopere avec un ressort 24 par 1'intermediaire de sa portion superieure formant crochet 18. Le ressort 24 est par exemple monte en amont et en aval de 1'element de verrouillage 17 sur le profile mobile (figure 3). 11 sollicite 1'element de verrouillage 17 vers le haut de sorte que, clans la position verrouillee,. les dents 20 de 1'element de verrouillage 17 cooperent avec la portion dentee 21 du profile fixe. In addition, the locking element can separate from the receiving profile, by breaking a securable portion between the fastening portion 22 and the sheet metal plate when sufficient energy is imparted to it. Such a securable portion is made in any suitable manner for example by local thinning between the sheet metal plate and the attachment portion. The locking element 17 cooperates with a spring 24 via its upper hook portion 18. The spring 24 is for example mounted upstream and downstream of the locking element 17 on the movable profile (FIG. 3). . 11 urges the locking element 17 upwards so that, in the locked position ,. the teeth 20 of the locking element 17 cooperate with the toothed portion 21 of the fixed profile.

Un exemple de dispositif de commande de deverrouillage 25 est egalement represents schematiquement sur la figure 3. Celui-ci peut par exemple comporter un axe 26 de rotation traversant le profile de reception et commandable de maniere classique par 1'occupant du siege. An example of an unlocking control device 25 is also shown diagrammatically in FIG. 3. This may for example comprise an axis of rotation traversing the reception profile and controllable conventionally by the occupant of the seat.

I1 peut egalement comporter une came 27 montee rotative par rapport au profile de reception solidairement a 1'axe 26. La came 27 comporte une portion d'activation 27a situse en regard de la portion superieure 18 formant crochet de 1'element de verrouillage 17. It may also include a cam 27 rotatably mounted relative to the receiving profile solidarily at the axis 26. The cam 27 has an activation portion 27a situse next to the upper portion 18 hook of the locking element 17.

Le mecanisme de retenue peut egalement comprendre une portion de deformation 29 realisee sous la forme d'une fente s'etendant longitudinalement dans 1'aile 7a, 7b du profile mobile et une goupille 30 (figure 4) de diametre legerement superieur a 1'epaisseur de la fente 29 et s'etendant d'une aile a 1'autre dans 1'exemple de realisation. La goupille 30 est par exemple disposee a une extremite de la fente 29, au contact ou a proximite d'une paroi laterale de 1'element de verrouillage 17, pour guider le coulissement de 1'element de verrouillage dans la direction transversale. Un tel mecanisme de retenue 28 peut titre realise en avant de 1'element de verrouillage 17, en arriere de celuici, ou a la fois en avant et arriere de celui-ci, comme represents sur la figure 3. The retainer mechanism may also include a deformation portion 29 in the form of a longitudinally extending slot in the wing 7a, 7b of the movable profile and a pin 30 (FIG. 4) of a diameter slightly greater than the thickness. of the slot 29 and extending from one wing to the other in the embodiment example. The pin 30 is for example arranged at one end of the slot 29, in contact with or near a side wall of the locking element 17, to guide the sliding of the locking element in the transverse direction. Such a retention mechanism 28 can be made in advance of the locking element 17, behind it, or both in front and rear thereof, as shown in FIG. 3.

Le mecanisme de verrouillage qui vient d'etre decrit fonctionne de la maniere suivante. Partant de la position verrouillee representee sur la figure 2, dans laquelle 1'element de verrouillage 17 coopere a la fois avec le profile mobile 6 par 1'intermediaire de sa portion d'attache 22 et avec le profile fixe par 1'intermediaire de ses dents 20 cooperant avec les portions den-tees 21 du profile fixe, 1'utilisateur commande le deverrouillage de la glissiere en deplacant la portion d'attache 22 dans la fente de guidage 23 menagee dans le profile mobile. Pour ce faire, it commande la rotation de la came 27 autour de 1'axe 26, de sorte que la portion d'activation 27a de la came deplace vers le bas 1'element de verrouillage 17 a 1'encontre de la sollicitation exercee par le ressort 24. Ce faisant, 1'element de verrouillage 17 est deplace vers sa position deverrouillee, en etant guide par le deplacement vers le bas de la portion d'attache 22 dans la fente 23, les dents 20 se degageant de la portion dentee 21, la portion inferieure de 1'element de verrouillage s'inserant dans les ouvertures 11a, llb menagees a cet effet dans le profile mobile. Ce faisant, les dents 20 de 1'element de verrouillage sortent de la portion den-tee 21 du profile fixe, de sorte que le profile mobile 6 n'est plus solidarise avec le profile fixe 12. L'utilisateur peut alors depla.cer le profile mobile par rapport au profile fixe par exemple lors d'un reglage de la position longitudinale du siege par rapport au plancher du vehicule. Dans ce cadre, 1'utilisateur ayant atteint la nouvelle position peut relacher le dispositif de commande 25 de sorte que 1'element de verrouillage 17 revienne, sous 1'action du ressort 24 dans une position verrouillee. L'element de verrouillage 17 se deplacant avec le profile mobile, it suffit de former dans ce dernier un nombre d'ouvertures 11a ou llb correspondant au nombre de dents 20. Par contre, le profile fixe comporte de nombreuses dents dans sa portion dentee 21, pour permettre d'obtenir de nombreuses positions de reglage. Alternativement, 1'utilisateur ne souhaite pas necessairement reverrouiller la glissiere clans une autre position, par exemple dans les cas ou le deverrouillage est effectue pour pouvoir deplacer le siege vers 1'avant pour acceder a 1'espace situe a 1'arriere du siege, par exemple clans un veh:icule trois portes. Il ressort de la description precsdente qu'un tel mecanisme de verrouillage pourrait comporter un unique element de verrouillage 17 ports par 1'une des ailes 7a, 7b du profile de reception ou, alternativement, comme represents, deux elements de verrouillage similaires portss chacun respectivement par 1'une des ailes 7a, 7b du profile de reception. The locking mechanism just described works in the following way. Starting from the locked position shown in FIG. 2, in which the locking element 17 cooperates with both the movable profile 6 via its fastening portion 22 and with the fixed profile through its members. With the teeth 20 cooperating with the portions 21 of the fixed profile, the user controls the unlocking of the slide by moving the attachment portion 22 into the guide slot 23 housed in the movable profile. To do this, it controls the rotation of the cam 27 around the axis 26, so that the activation portion 27a of the cam moves down the locking element 17 against the stress exerted by the spring 24. In doing so, the locking element 17 is moved towards its unlocked position, being guided by the downward displacement of the fastening portion 22 in the slot 23, the teeth 20 emerging from the dentee portion. 21, the lower portion of the locking element inserted in the openings 11a, 11b provided for this purpose in the movable profile. In doing so, the teeth 20 of the locking element out of the den-tee portion 21 of the fixed profile, so that the movable profile 6 is no longer secured to the fixed profile 12. The user can then depla.cer the mobile profile relative to the fixed profile for example when adjusting the longitudinal position of the seat relative to the floor of the vehicle. In this context, the user having reached the new position can release the control device 25 so that the locking element 17 returns, under the action of the spring 24 in a locked position. The locking member 17 moving with the movable profile, it is sufficient to form in the latter a number of openings 11a or 11b corresponding to the number of teeth 20. On the other hand, the fixed profile has many teeth in its dentee portion 21 , to allow to obtain many adjustment positions. Alternatively, the user does not necessarily want to re-lock the slide in another position, for example in cases where unlocking is performed to be able to move the seat forward to access the space at the rear of the seat, for example, in one door, three doors. It follows from the above description that such a locking mechanism could comprise a single locking element 17 ports by one of the wings 7a, 7b of the reception profile or, alternatively, as represented, two similar locking elements each respectively by one of the wings 7a, 7b of the reception profile.

Lors d' un choc, represents par la fleche C sur la figure 6, superieur a une energie predeterminee, le mecanisme de retenue va dissiper une partie du choc. Par exemple, la portion d'attache 22 de 1'slement de verrouillage 17 sur le profile mobile 6 est calibree pour casser. Comme un tel choc survient generalement quand la glissiere est verrouillee, 1'element de verrouillage 17 cooperant par 1'intermsdiaire de ses dents 20 avec la portion dentee 21 du profile fixe (non visible sur la figure 6) reste solidaire du profile fixe. Le profile mobile 6 n'etant, quant a lui, plus verrouille sur le profile fixe tend a se deplacer dans la direction indiquee par la fleche C de la figure 6, correspondant au choc. Lors de ce deplacement, la goupille 30 du mecanisme de retenue 28 situee a gauche de 1'element de verrouillage sur les figures 3 et 6 va coulisser clans la fente 29 longitudinale menagee a cet effet dans le profile mobile, en la deformant, afin de dissiper localement une partie de 1'energie impartie a la glissiere par le choc C. Ainsi, lors du choc, le siege 1 sera autorise a se deplacer sur une course relativement etendue par rapport au chassis du vehicule, dans le sens du choc, avec dissipation locale d'energie au niveau de la glissiere, ce qui permet d'attenuer, au niveau de 1'occupant, les effets nefastes du choc. In a shock, represented by the arrow C in FIG. 6, greater than a predetermined energy, the holding mechanism will dissipate part of the shock. For example, the fastening portion 22 of the locking member 17 on the movable profile 6 is calibrated to break. As such a shock generally occurs when the slide is locked, the lock member 17 cooperating through its teeth 20 with the toothed portion 21 of the fixed profile (not visible in Figure 6) remains attached to the fixed profile. The movable profile 6 being, in turn, more locked on the fixed profile tends to move in the direction indicated by the arrow C of Figure 6, corresponding to the shock. During this displacement, the pin 30 of the retaining mechanism 28 located to the left of the locking element in FIGS. 3 and 6 will slide in the longitudinal slot 29 provided for this purpose in the mobile profile, deforming it in order to locally dissipate part of the energy imparted to the slide by the shock C. Thus, during the shock, the seat 1 will be allowed to move on a relatively extended stroke relative to the chassis of the vehicle, in the direction of impact, with local dissipation of energy at the slide, which allows to reduce, at the level of the occupant, the adverse effects of the shock.

Pendant la duree de ce coulissement jusqu'en butee de goupille 30 Bans la fente 29 dans la position de securite representee sur la figure 6, la glissiere n'est plus deverrouillable, d'une part en raison de la separation de 1'element de verrouillage 17 du profile de reception 6, d'autre part en raison du decalage de 1'element de verrouillage 17 et du dispositif de commande 25 ports par le profile mobile 6, et egalement du fait du decalage des dents 20 de 1'element de verrouillage des ouvertures llb correspondantes du profile mobile. Toute sollicitation de 1'element de verrouillage vers le bas, au cours du choc, verra celui-ci buter sur la portion de butee du profile mobile, car 1'element de verrouillage n'est plus en regard des ouvertures 11a. I1 en resulte une interdiction du deplacement relatif du profile fixe et de 1'element de verrouillage, qui est par ailleurs retenu en butee sur le profile mobile dans la position de securite, et donc une bonne securite pour 1'occupant. En realisant des mecanismes de retenue 28 symetriques l'un de 1'autre par rapport a 1'element de verrouillage 17, on peut obtenir le meme effet en choc avant >> et en choc arriere >> pour la glissiere. Comme represents sur la figure 7, pour faciliter le reverrouillage de la glissiere en position verrouillee, on peut par exemple prevoir un verrouillage par cisaillement, dans un mode de realisation comportant deux elements de verrouillage 17 tel que represents sur les figures 2 et 5. Dans un exemple de realisation, on peut par exemple prevoir que la portion dentee 21 de 1'auge 15a et la portion dentee 21 de 1'auge 15b sont disposees de maniere identique, les evidements de chacune de ces portions den-tees etant plus larges que les dents correspondantes des elements de verrouillage 17 devant y etre inserees pour verrouiller la glissiere. Les elements de verrouillage 17 portes respectivement par la premiere aile 7a et la deuxieme aile 7b sont, quant a eux, legerement decale , de sorte que, clans la position verrouillee, representee sur la figure 7, les dents 20 de 1'element de verrouillage 17 de 1'aile 7a cooperent avec une partie orientee vers 1'avant des evidements de la portion den-tee 21 de 1'auge 15a tandis que les dents 20 de 1'element de verrouillage 17 portees par 1'aile 7b cooperent avec une portion dirigee vers 1'arriere de la portion dentee 21 de 1'auge 15b. Pouf obtenir le verrouillage d'un tel systeme, depuis une position verrouillee, lorsque 1'utilisateur relache la commande 26, au moins l'un des deux elements de verrouillage 17 va trouver a proximite une portion dentee 21 dans laquelle it va pouvoir s'introduire puis, lors d'un deplacement ulterieur du profile mobile 6 dans la direction de coulissement, les dents 20 de 1'autre element de verrouillage vont se retrouver en regard de la portion dentee 21 correspondante du profile fixe et vont s'inserer clans celle-ci sous 1'action du ressort 24, la glissiere se retrouvant alors dans la position verrouillee de la figure 7. During the duration of this sliding to pin stop 30 Bans the slot 29 in the safety position shown in Figure 6, the slide is no longer unlockable, on the one hand because of the separation of 1'element de locking 17 of the receiving profile 6, on the other hand because of the shift of the locking element 17 and the control device 25 ports by the movable profile 6, and also because of the offset of the teeth 20 of the element of locking the corresponding openings llb of the movable profile. Any biasing of the locking element downwards, during the shock, will see it abut on the stop portion of the movable profile, since the locking element is no longer opposite the openings 11a. This results in a prohibition of the relative displacement of the fixed profile and the locking element, which is moreover held in abutment on the movable profile in the safety position, and thus a good security for the occupant. By performing symmetrical retaining mechanisms 28 against each other with respect to locking element 17, the same shock effect can be obtained before >> and in rear impact >> for the slideway. As shown in FIG. 7, to facilitate re-locking of the slide in the locked position, it is possible, for example, to provide shear locking in an embodiment comprising two locking elements 17 as represented in FIGS. 2 and 5. an exemplary embodiment, one can for example predict that the slotted portion 21 of 1'auge 15a and the portion dentee 21 of 1'auge 15b are arranged identically, the recesses of each of these portions den-tees being wider than the corresponding teeth of the locking elements 17 to be inserted therein to lock the slide. The locking elements 17 doors respectively by the first wing 7a and the second wing 7b are, for their part, slightly shifted, so that, in the locked position, shown in Figure 7, the teeth 20 of 1'element locking 17 of the wing 7a cooperate with a forward-facing portion of the recesses of the den-tee portion 21 of the blade 15a while the teeth 20 of the locking member 17 carried by the wing 7b cooperate with a portion directed towards the rear of the dentee portion 21 of the age 15b. To obtain the locking of such a system, from a locked position, when the user releases the control 26, at least one of the two locking elements 17 will find a nearby dentee portion 21 in which it will be s' then introduce, during a subsequent displacement of the movable profile 6 in the direction of sliding, the teeth 20 of the other locking element will be found opposite the corresponding toothed portion 21 of the fixed profile and will be inserted into that under the action of the spring 24, the slide then being in the locked position of FIG. 7.

A titre d'alternative, on observera que les deux elements de verrouillage 17 peuvent etre disposes au meme niveau, alors que les portions dentees 21 de part et d'autre du profile fixe sont decalees le long de la direction X de coulissement. Alternatively, it will be observed that the two locking elements 17 can be arranged at the same level, while the slotted portions 21 on either side of the fixed profile are shifted along the X sliding direction.

Dans une disposition donnee des elements de verrouillage 17 et des portions den-Les 21, on peut en outre prevoir que, clans chaque position possible dans laquelle la commande est relachee par 1' utilisateur, 1' un des elements de verrouillage 17 se trouve dans une position clans laquelle it peut s'engager dans la portion dentee 21 correspondante du profile fixe. Dans le mode de realisation preserite, le mecanisme de retenue comprend a la fois le systeme de la portion d'attache 22 secable clans la fente 23 et le systeme de la goupille 30 dans la fente 29. Dans une variante de realisation, on notera que la fente 29 n'est pas necessairement de diametre inferieur a la goupille 30. La dissipation d'energie a alors lieu uniquement par separation (casse) de la portion d'attache 22. Dans une autre variante, on notera qu'on n'utilise pas necessairement une portion d'attache 22. Le guidage de 1'element de verrouillage est assure par les goupilles 30 en contact avec celui-ci. La dissipation d'energie est assuree par les goupilles 30 de diametre superieur a la fente 29 Bans cette variante. Dans le mode de realisation presente, 1'element de verrouillage 17 se deplace parallelement a la direction de coulissement par rapport au profile mobile. Toutefois, dans une variante de realisation, it suffit que 1'element de verrouillage 17 se deplace par rapport au profile mobile par un mouvement presentant au moms une composante non nulle le long de la direction de coulissement. In a given arrangement of locking elements 17 and portions 21, it can further be provided that in each possible position in which the control is released by the user, one of the locking elements 17 is located in a position in which it can engage in the corresponding dentee portion 21 of the fixed profile. In the preferred embodiment, the retaining mechanism includes both the system of the securing attachment portion 22 in the slot 23 and the pin system 30 in the slot 29. In an alternative embodiment, it will be appreciated that the slot 29 is not necessarily of a diameter smaller than the pin 30. The energy dissipation then takes place only by separation (breakage) of the fastening portion 22. In another variant, it will be noted that Not necessarily use a fastening portion 22. The guiding of the locking element is provided by the pins 30 in contact therewith. The energy dissipation is ensured by the pins 30 of diameter greater than the slot 29 Bans this variant. In the present embodiment, the locking element 17 moves parallel to the direction of sliding with respect to the movable profile. However, in an alternative embodiment, it is sufficient for the locking member 17 to move relative to the movable profile by a movement having at least one non-zero component along the sliding direction.

Claims

1. Motor vehicle seat slide comprising a first profile (6) and a second profile (12), said profiles being for one intended fixedly to a motor vehicle chassis, and for the other intended to be reported a vehicle seat member receiving a passenger, the first profile being slidably mounted relative to the second profile along a sliding direction, said slider further comprising a locking member (17) mounted on the first profile (6). ), said locking element being movable with respect to the first profile in a transverse direction distinct from the sliding direction between a locked position in which it cooperates with both the first and second profiles to prevent a relative displacement of the profiles (12; 6) along the direction of sliding, and an unlocked position in which it does not cooperate with the second profile to allow this relative displacement, caracter characterized in that the locking element (17) is mounted displaceably in the sliding direction with respect to the first profile (6) from its locked position to a safety position in which a displacement of the locking element ( 17) relative to the second profile (12) in the transverse direction is prohibited.

2. Slide according to claim 1 comprising a retaining mechanism (22, 23; 28) adapted to prohibit a relative movement of the locking element (17) and the first profile (6) in the sliding direction in normal operation of the slide, and to allow said relative movement during an impact.

3. Slide according to claim 2, in whichthe locking mechanism (22, 23; 28) of the locking element is adapted to guide the displacement of the locking element (17) relative to the first profile in the transverse direction, the displacement of the element being locked with respect to the first profile (6) in the sliding direction being authorized, in the event of an impact, by energy dissipation of the impact on the retaining mechanism (22, 23; 28).

4. Slide according to claim 3 wherein the retaining mechanism comprises a slot (23) housed in the movable profile and a fastening portion (22) housed in the locking element, said fastening portion sliding in the slot in the transverse direction, said attachment portion being mounted separable on the first profile, so that, during an impact, the relative movement in the soft sliding direction allows between the first profile on the one hand and the second profile and the element be lock integral with each other on the other hand.

5. Slide according to one of claims 2 to 4 wherein the retaining mechanism (28) comprises a deformation portion (29) formed in the first profile, and comprising a stop, wherein the retaining mechanism comprises a complementary element (30) of the deformation portion, adapted to deform the deformation portion by moving in the sliding direction in the deformation portion (29) to said stop, and wherein said locking member (17) cooperates with said complementary element (30) for retaining said complementary element and braking the first profile during said relative movement between the locking element and the first profile in the sliding direction until said complementary element (30) reaches the stop in said position be securely be1'element locking.

6. Slide according to claim 5, wherein the deformation portion comprises at least one slot (29) housed in the receiving profile, and wherein the complementary element comprises at least one pin (30) inserted transversely in the profile of receiving, in said slot, in contact with the locking element (17).

A slide as claimed in any one of claims 5 or 6, wherein the retaining mechanism (28) is symmetrical with respect to the locking element (17) for braking said relative movement of the locking element and the first profile as well in the two opposite directions of the sliding direction.

A slide according to any one of claims 2 to 7, wherein the first profile comprises a first (7a) and a second (7b) flange parallel to the sliding direction, the first flange (7a) comprising said locking member. (17) and said retention mechanism (22, 23; 28) and the second wing (7b) comprising a locking member (17) and a retaining mechanism (22, 23; 28) similar to said locking member, respectively. and the retention mechanism of the first wing.

A slide as claimed in any one of the preceding claims, wherein the first profile comprises a profile having at least one abutment surface and at least one aperture (11b) spaced apart from the abutment surface along the direction. sliding, said opening being located opposite the locking element in the locked position, in which the locking element (17) is mounted on the first profile (16) so that it is inserted into said opening (11b) during its movement from its locked position to its locked position in the transverse direction, said locking element being movable relative to the first profile in the sliding direction to the safety position in which the element the lock (17) is no longer opposite the opening (11b) and is opposite the abutment surface, to prevent the locking element from moving relative to the first profile (16) B in the direction cross.

10. Vehicle seat comprising a vehicle seat element (2) adapted to receive a passenger and a slide (4) according to any one of the preceding claims, said seat element being mounted on the first profile.