WO2008152270A2 - Stowable seat, in particular for a motor vehicle - Google Patents

Stowable seat, in particular for a motor vehicle Download PDF

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Publication number
WO2008152270A2
WO2008152270A2 PCT/FR2008/050828 FR2008050828W WO2008152270A2 WO 2008152270 A2 WO2008152270 A2 WO 2008152270A2 FR 2008050828 W FR2008050828 W FR 2008050828W WO 2008152270 A2 WO2008152270 A2 WO 2008152270A2
Authority
WO
WIPO (PCT)
Prior art keywords
seat
retractable
locking
locking means
finger
Prior art date
Application number
PCT/FR2008/050828
Other languages
French (fr)
Other versions
WO2008152270A3 (en
Inventor
Philippe Souville
Olivier Brout
Alain Thebault
Original Assignee
Renault S.A.S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault S.A.S filed Critical Renault S.A.S
Priority to EP08805776A priority Critical patent/EP2152540A2/en
Publication of WO2008152270A2 publication Critical patent/WO2008152270A2/en
Publication of WO2008152270A3 publication Critical patent/WO2008152270A3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/30—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats
    • B60N2/3088—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats characterised by the mechanical link
    • B60N2/309—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats characterised by the mechanical link rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/065—Rear seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/12—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable and tiltable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/30—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats
    • B60N2/3002—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats back-rest movements
    • B60N2/3004—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats back-rest movements by rotation only
    • B60N2/3009—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats back-rest movements by rotation only about transversal axis
    • B60N2/3011—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats back-rest movements by rotation only about transversal axis the back-rest being hinged on the cushion, e.g. "portefeuille movement"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/30—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats
    • B60N2/3038—Cushion movements
    • B60N2/3063—Cushion movements by composed movement
    • B60N2/3065—Cushion movements by composed movement in a longitudinal-vertical plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/30—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats
    • B60N2/3088—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats characterised by the mechanical link
    • B60N2/3093—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats characterised by the mechanical link slides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/32—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles convertible for other use
    • B60N2/36—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles convertible for other use into a loading platform
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/68—Seat frames
    • B60N2/688—Particular seat belt attachment and guiding

Definitions

  • the present invention relates to a vehicle seat, which is able to retract to reduce its size.
  • the invention finds a particularly advantageous, but not exclusive, application in the automotive field.
  • retractable seats are usually used, that is to say movable mounted seats moving between a position of use in which they are deployed so as to be able to receive occupants, and a storage position in which they are folded in order to occupy a minimal size.
  • the kinematics of retraction of such a seat traditionally consists of tilting the backrest substantially horizontally against the top of the seat, and then down to the floor; the back of the folder then serving as a loading plan.
  • the displacement of the seat between the position of use and the storage position is most often guided by links that operate according to the principle of deformable parallelograms.
  • the seat is generally connected to the base by means of four connecting rods which are articulated substantially to the four corners of the seat.
  • the immobilization of the seat relative to the underbody is usually achieved by locking one or more connecting rods, that is to say by directly blocking the mobility of at least one of them.
  • This type of retractable seat has the disadvantage of requiring significant dimensioning rods, since they are the ones that will bear the majority of mechanical stresses.
  • the rods will indeed have to be able to withstand any shocks suffered by the vehicle in the event of an accident. It should be noted that this need to reinforce the mechanical strength of the connecting rods becomes even more imperative since, as is generally the case with a seat type, the seat also serves as an anchorage point for a seat belt. security.
  • the technical problem to be solved by the object of the present invention is to provide a retractable seat particularly for a motor vehicle, comprising a movably mounted seat moving relative to a base between a position of use and a storage position a backrest pivotally mounted relative to the seat, and means for guiding the displacement of the seat between the position of use and the storage position, retractable seat which would avoid the problems of the state of the technique presenting a substantially reduced cost, while providing optimum mechanical strength especially in the use position.
  • the retractable seat further comprises locking means capable of blocking the displacement of the seat directly on the base, independently of the guide means.
  • the invention applies to any type of seat, that is to say regardless of the structure of the frames supporting the seat and backrest. In particular, it appears perfectly compatible with seats fitted with standard fittings, which is particularly advantageous from an economic point of view. This also means that the invention does not call into question the integration of additional functions such as, for example, lumbar adjustment, adjustment of the backrest, heating, ventilation, air conditioning or electrical controls.
  • the invention as thus defined has the advantage of separating the locking and guiding functions, so that their respective implementation means can be dimensioned independently of one another. , depending solely on the constraints specific to them.
  • the guiding means used will certainly participate in the support of the seat in the use position, but they will not in any case to ensure immobilization. They therefore do not need to be oversized in order to withstand the most important mechanical stresses, ie the forces generated in the event of collision of the vehicle.
  • Another advantage of this type of architecture is that it is very easy to adapt. It is indeed possible to adjust the height of a retractable seat according to the effective unevenness of a vehicle floor, simply by changing the dimensions of the base which remains an uncomplicated element to adapt in terms of mechanical strength . This makes it possible to avoid a systematic redefinition of the guide means which can then be standardized once an adequate structural dimensioning has been calculated.
  • the retractable seat according to the invention also has the advantage of greatly improving the comfort of the passenger sitting directly behind.
  • the present invention also relates to the features which will emerge during the following description, which should be considered in isolation or in all their possible technical combinations.
  • Figure 1 illustrates the internal structure of a retractable seat according to the invention.
  • Figure 2 is an exploded showing the retractable seat in rear perspective.
  • Figure 3 shows an element of the locking means for immobilizing the seat of the retractable seat.
  • Figure 4 is an exploded retractable seat, seen from below.
  • Figure 5 is a view similar to Figure 2, but in front perspective.
  • Figures 6 to 10 are partially transparent side views, which illustrate the kinematics of the retractable seat detailed in Figures 1 to 5.
  • Figure 6 shows more particularly the retractable seat locked in the use position.
  • Figure 7 shows the retractable seat unlocked in the use position, that is to say at the beginning of the displacement phase to the storage position.
  • Figure 8 shows the retractable seat during movement from the use position to the storage position.
  • FIG. 9 shows the retractable seat at the end of displacement from the use position to the storage position, that is to say unlocked in the storage position.
  • Figure 10 illustrates the retractable seat locked in storage position
  • Figure 1 illustrates a retractable seat 1 of a motor vehicle, which is intended to take place in the second row of a passenger compartment, that is to say just behind the front seats. It is observed that for the sake of clarity, only its internal structure has been represented in this first illustration.
  • the retractable seat 1 is essentially composed of a seat 10 on which is articulated a backrest 20 adjustable in inclination; the whole being mounted on a base 30 which is intended to be secured to the floor of the vehicle.
  • the seat 10 is composed of a foam 11 which is supported by a metal frame 12 consisting of an assembly of a front cross member 13, a cross member rear 14, and two flanges 15, 16.
  • a seat sheet 17 is also stretched between the front cross member 13 and the rear cross member 14, so as to support the foam 11 in the central area of the seat 10.
  • the upper portion of the front cross member 13 has a convex shape to form an anti bump - submarine that can prevent small people from sliding under the seat belt during a frontal impact.
  • the structure of the back 20 also results from the combination of a foam 21 and a metal armature 22. But this latter essentially consists of a tubular frame 23 on which are fixed a lattice 24 responsible for supporting the foam 21 in the central area of the backrest 20, and two flanges 25, 26 which are connected to the two seat flanges 15, 16 by pivot links.
  • a tablet 27 is also secured to the back of the backrest 20, so that the latter has a flat surface at the level of the loading plane of the vehicle, once tilted against the seat 10.
  • the base 30 comprises two brackets 31, 32 which are rigidly secured to one another via a central connecting tube 33.
  • Each bracket 31, 32 is also mounted on a movable slideway 34, 35 which cooperates with each other. sliding with a fixed slide 36, 37 to be fixed to the floor of the vehicle.
  • the purpose of such an arrangement is conventionally to be able to adjust the longitudinal position of the retractable seat 1 in the passenger compartment.
  • the retractable character of the seat 1 is conferred by a movable mounting of the seat 10 relative to the base 30. This mobility is exerted between a position of use in which the seat 10 is deployed at a distance from the floor in order to receive an occupant, and a storage position in which it has descended closer to said floor so as to occupy only a small footprint.
  • guide means 40 which are here in the form of four rods 41, 42, 43, 44.
  • guide means 40 which are here in the form of four rods 41, 42, 43, 44.
  • the retractable seat 1 also has locking means 50 which are able to immobilize the seat 10 by blocking its movement directly from the base 30, that is to say say completely independently of the guide means 40.
  • the locking means 50 capable of immobilizing the seat 10 in any intermediate position between the use position and the storage position. However, it is especially essential that the locking means 50 are able to immobilize the seat 10 at least in the position of use.
  • the locking means 50 are also capable of immobilizing the seat 10 in the storage position, as is precisely the case in the particular embodiment which has been chosen for example to illustrate the invention. This feature makes it possible to maintain the seat 1 near the floor, and thus to avoid unwanted noise during the rolling of the vehicle, or even untimely movements to the passage of a bump or a bleed.
  • the assembly is preferably arranged so that the locking means 50 are able to block the displacement of the seat 10 at the anchor point 60 in question.
  • the seatbelt is mainly responsible for retaining the occupant of the seat in the event of frontal impact, it will be extremely sought after it will be to cash this type of sudden deceleration. Very pulling forces Therefore important are likely to be applied to the anchor point 60. It is therefore very relevant to dispel them as quickly as possible in the floor of the vehicle, by transmitting directly from the seat 10 to the base 30, that is to say without passing them through the guide means 40.
  • the assembly when the seat 10 of the seat 1 is further mounted to pivot forwardly relative to a transverse axis 70, the assembly is preferably arranged so that the locking means 50 are able to block the displacement of the seat 10 at the level of the tilting axis 70.
  • the tilting axis 70 constitutes a kind of optimum.
  • This mobility is intended to facilitate the passage behind the retractable seat 1 , for example to access a third row of seats.
  • the kinematics adopted consists schematically to lower the seat nose when the seat 1 is advanced beyond what allows the classic longitudinal adjustment. It should be noted that in the traditional way, this operation is possible only after unlocking the movable slides 34, 35 with respect to fixed slides 36, 37.
  • the front connecting rods 41, 42 are connected to the underbody 30 by sliding pivot links.
  • their lower parts are coupled by means of a connecting tube 45 whose ends are able to slide along two slides 38, 39 respectively formed on the inner faces of the two brackets 31, 32.
  • the connecting tube 45 is also secured to a strap 46 which is attached to the floor.
  • the assembly is arranged so that in the manner of a stop, the strap 46 retains the connecting tube 45 when the advance of the retractable seat 1 exceeds a certain limit which is located in front of the relative to the longitudinal adjustment of the seat 10. It follows that if we continue moving the seat 1 even further forward, the front rods 41, 42 will begin to lie while the connecting tube 45 will finish by sliding back slides 38, 39.
  • the seat nose 10 will therefore tilt gradually downwards, at the same time straightening the backrest 20 in a substantially vertical position and therefore less bulky.
  • the front portion of the seat 10 is in turn somehow able to slip under the back of the front seat, increasing all the travel movement towards the front of the retractable seat 1.
  • the retractable seat 1 has both an anchor point 60 for a seat belt, and a mobility tilt relative to a transverse axis 70.
  • the anchoring point 60 and the tilting axis 70 in question here coincide with the parts of the seat 10 which cooperate with the locking means 50.
  • This also shows the fundamental importance of the seat parts. in question which should serve as both locking zones, anchoring zones and pivot zones.
  • the locking means 50 comprise on each side of the seat 1, a finger 51 which is secured to the seat 10, an oblong slot 52 which is formed in the base 30, and a locking element 53 which is pivotally mounted on said base 30.
  • the assembly is arranged so that during the displacement of the seat 10 between the position of use and the storage position, the finger 51 is able to traverse the oblong slot 52 between two ends 52a, 52b respectively correspond to said use position and said storage position.
  • the whole is moreover organized in such a way that the mobility of the locking element 53 is exerted between an active position in which it is able to block the finger 51 at each end. 52a, 52b of the oblong slot 52, and a passive position in which it is disposed away from said finger 51.
  • each oblong slot 52 corresponds to the path traveled by the finger 51 associated therewith, when the seat 10 is moved between the position of use and the storage position.
  • the two ends 52a, 52b of each oblong slot 52 act as abutments with respect to the associated finger 51, limiting the displacement of the seat 10 between two extremes which respectively correspond to the position of use and to the storage position.
  • the locking means 50 are further provided with elastic return means which permanently drive each locking element 53 in the active position.
  • This characteristic makes it possible to generate an automatic locking of each finger 51 when it reaches an end 52a, 52b of the oblong slot 52 associated therewith. It is thus possible to immobilize the seat 10 in the use position or in the storage position, without the user having to perform any locking action.
  • this return function can be performed by any elastic return means known from the state of the art.
  • connecting means 54 coupling the pivoting of the two elements of blocking 53 put at stake.
  • connection means 54 is present in the form of a conjugation bar. It is furthermore understood that the presence of locking means 50 on each side of the retractable seat 1 constitutes a preferred embodiment of the invention, since it makes it possible to guarantee perfect immobilization of the seat 10 by the symmetry of such an arrangement. However, it would be perfectly conceivable to design a variant equipped with locking means 51 only on one side of the retractable seat 1.
  • the retractable seat 1 is further provided with control means 80 which are able to actuate the locking means 50 from the seat 10.
  • control means 80 are able to drive each blocking element 53 in the passive position.
  • control means 80 here comprise a lever 81 which is pivotally mounted on the seat 10 around a finger 51 of the locking means
  • This lever 81 also supports a projecting stud 82 which is able to slide along a slot 83 formed on the locking element 53 associated with said finger 51.
  • the retractable seat 1 can also be provided with control means 80 capable of actuating the locking means 50 from the backrest 20.
  • control means 80 may particularly advantageously be constituted directly by the backrest 20 whose pivoting is able to actuate the locking means 50.
  • Figures 6 to 10 illustrate more particularly the retraction kinematics of the retractable seat 1.
  • FIG. 7 shows the unlocking of the retractable seat 1.
  • the seat 10 is still in the use position, but the control means 80 have been actuated to deactivate the locking means 50.
  • the pivoting of the seat lever 81 has caused each blocking element 53 to shift from the active position to the passive position, thus freeing the mobility of each finger 51.
  • the seat 10 is then ready to be moved to the storage position.
  • the displacement of the seat 10 from the use position to the storage position is achieved under the control of the guide means 40.
  • the descent of the seat 10 operates by simple gravity by describing a circular trajectory, due to the simultaneous tilting of the front connecting rods 41, 42 and the rear connecting rods 43, 44.
  • the fingers 51 freely traverse the lights 52 since during this phase, the locking means 50 are inoperative although blocking elements 53 have found the active position under the action of elastic return means associated with them.
  • the control means 80 remain resting.
  • Figure 9 illustrates the retractable seat 1 when it arrives in the storage position.
  • the seat 10 reaches its lowest position, but it is not yet locked.
  • the locking elements 53 have been moved to the passive position by the simple thrust exerted by the fingers 51 at the end of their movement, that is to say without the control means 80 have been activated.
  • the retractable seat 1 finally appears locked in the storage position.
  • the blocking elements 53 have found their active position always without user intervention, due solely to the action of the associated elastic return means.
  • the fingers 51 are then locked at the lower ends 52b of the lights 52, thus perfectly immobilizing the seat 10 as close to the floor of the vehicle.
  • the invention relates to any motor vehicle with at least one retractable seat 1 as previously described.

Abstract

The present invention relates to a stowable seat (1), in particular for a motor vehicle, comprising a seat part (10) mounted movably with respect to an understructure (30) between a use position and a storage position, a seat back (20) mounted pivotably with respect to the seat part (10), and means (40) for guiding the movement of the seat part between the use position (10) and the storage position. The invention is noteworthy in that the stowable seat (1) additionally comprises locking means (50) designed to block the movement of the seat part (10) directly on the understructure (30), independently of the guide means (40).

Description

SIÈGE ESCAMOTABLE NOTAMMENT POUR VÉHICULE SEAT OBTAINABLE IN PARTICULAR FOR A VEHICLE
AUTOMOBILEAUTOMOBILE
Domaine technique La présente invention concerne un siège de véhicule, qui est à même de s'escamoter afin de réduire son encombrement.Technical Field The present invention relates to a vehicle seat, which is able to retract to reduce its size.
L'invention trouve une application particulièrement avantageuse, mais non exclusive, dans le domaine automobile.The invention finds a particularly advantageous, but not exclusive, application in the automotive field.
Aujourd'hui, la modularité de l'habitacle est devenu un critère important des cahiers des charges des véhicules automobiles. On pense avant tout ici aux véhicules à vocation familiale tels que les monospaces, mais aussi aux véhicules de loisir comme par exemple les SUV. Il s'avère en effet particulièrement intéressant de pouvoir modifier rapidement et facilement l'agencement d'un habitacle, afin de privilégier en fonction des besoins de l'instant, soit la capacité d'accueil en passagers, soit le volume de chargement du véhicule.Today, the modularity of the passenger compartment has become an important criterion for motor vehicle specifications. We think above all here for family-oriented vehicles such as minivans, but also for recreational vehicles such as SUVs. It is indeed particularly interesting to be able to quickly and easily change the layout of a passenger compartment, in order to prioritize according to the needs of the moment, either the passenger capacity or the load volume of the vehicle .
Pour pouvoir disposer d'une surface de chargement plate sans avoir à retirer les sièges, il est connu de compacter ces derniers au plus près du plancher du véhicule. Dans ce but, on utilise habituellement des sièges escamotables, c'est-à- dire des sièges montés mobiles en déplacement entre une position d'utilisation dans laquelle ils sont déployés de manière à pouvoir recevoir des occupants, et une position de stockage dans laquelle ils sont repliés afin d'occuper un encombrement minimal. La cinématique d'escamotage d'un tel siège consiste traditionnellement à faire basculer le dossier sensiblement à l'horizontale contre le dessus de l'assise, puis à faire descendre le tout vers le plancher ; l'arrière du dossier servant alors de plan de chargement.To be able to have a flat loading surface without removing the seats, it is known to compact the latter closer to the floor of the vehicle. For this purpose, retractable seats are usually used, that is to say movable mounted seats moving between a position of use in which they are deployed so as to be able to receive occupants, and a storage position in which they are folded in order to occupy a minimal size. The kinematics of retraction of such a seat traditionally consists of tilting the backrest substantially horizontally against the top of the seat, and then down to the floor; the back of the folder then serving as a loading plan.
Dans la pratique, le déplacement de l'assise entre la position d'utilisation et la position de stockage est le plus souvent guidé par des embiellages fonctionnant suivant sur le principe des parallélogrammes déformables. Concrètement, le siège est généralement relié au soubassement par l'intermédiaire de quatre bielles qui sont articulées sensiblement aux quatre coins de l'assise. L'immobilisation de l'assise par rapport au soubassement est habituellement réalisée par verrouillage d'une ou plusieurs bielles, c'est-à-dire en bloquant directement la mobilité d'au moins l'une d'entre elles.In practice, the displacement of the seat between the position of use and the storage position is most often guided by links that operate according to the principle of deformable parallelograms. In concrete terms, the seat is generally connected to the base by means of four connecting rods which are articulated substantially to the four corners of the seat. The immobilization of the seat relative to the underbody is usually achieved by locking one or more connecting rods, that is to say by directly blocking the mobility of at least one of them.
Ce type de siège escamotable présente toutefois l'inconvénient de nécessiter un dimensionnement important des bielles, étant donné que ce sont elles qui vont supporter la plus grande partie des contraintes mécaniques. Outre au poids du passager et/ou aux forces inhérentes à l'utilisation dynamique du véhicule, les bielles vont en effet devoir être en mesure de résister aux éventuels chocs subis par le véhicule en cas d'accident. Il est à noter que cette nécessité de renforcer la tenue mécanique des bielles devient encore plus impérative dès lors que, comme c'est généralement le cas avec de genre de siège, l'assise sert par ailleurs de point d'ancrage à une ceinture de sécurité.This type of retractable seat, however, has the disadvantage of requiring significant dimensioning rods, since they are the ones that will bear the majority of mechanical stresses. In addition to the weight of the passenger and / or the forces inherent in the dynamic use of the vehicle, the rods will indeed have to be able to withstand any shocks suffered by the vehicle in the event of an accident. It should be noted that this need to reinforce the mechanical strength of the connecting rods becomes even more imperative since, as is generally the case with a seat type, the seat also serves as an anchorage point for a seat belt. security.
Quoi qu'il en soit, l'utilisation de bielles fortement dimensionnées rend le soubassement du siège intrinsèquement plus coûteux, mais cela limite également les possibilités d'adaptation de ce dernier. D'un véhicule à l'autre, les planchers sont en effet de formes différentes avec des dénivellations qui leur sont propres, ce qui impose par là même l'emploi de bielles de longueurs adaptées pour obtenir un plan de chargement plat. Il va par conséquent être nécessaire de faire des calculs de résistance mécanique au cas par cas, ce qui conduit à concevoir des sièges de structures spécifiques, forcément plus onéreux que des produits standards.In any case, the use of highly dimensioned connecting rods makes the base of the seat intrinsically more expensive, but it also limits the possibilities of adaptation of the latter. From one vehicle to another, the floors are in fact of different shapes with their own unevenness, which thus imposes the use of connecting rods of suitable lengths to obtain a flat loading plan. It will therefore be necessary to make calculations of mechanical strength on a case by case basis, which leads to design seats of specific structures, necessarily more expensive than standard products.
Aussi, le problème technique à résoudre par l'objet de la présente invention, est de proposer un siège escamotable notamment pour véhicule automobile, comportant une assise montée mobile en déplacement par rapport à un soubassement entre une position d'utilisation et une position de stockage, un dossier monté pivotant par rapport à l'assise, ainsi que des moyens de guidage du déplacement de l'assise entre la position d'utilisation et la position de stockage, siège escamotable qui permettrait d'éviter les problèmes de l'état de la technique en présentant un prix de revient sensiblement réduit, tout en offrant une tenue mécanique optimale notamment en position d'utilisation.Also, the technical problem to be solved by the object of the present invention is to provide a retractable seat particularly for a motor vehicle, comprising a movably mounted seat moving relative to a base between a position of use and a storage position a backrest pivotally mounted relative to the seat, and means for guiding the displacement of the seat between the position of use and the storage position, retractable seat which would avoid the problems of the state of the technique presenting a substantially reduced cost, while providing optimum mechanical strength especially in the use position.
La solution au problème technique posé consiste, selon la présente invention, en ce que le siège escamotable comporte en outre des moyens de verrouillage aptes à bloquer le déplacement de l'assise directement sur le soubassement, indépendamment des moyens de guidage.The solution to the technical problem posed, according to the present invention, in that the retractable seat further comprises locking means capable of blocking the displacement of the seat directly on the base, independently of the guide means.
Il est entendu que l'invention s'applique à tout type de siège, c'est-à-dire quelle que soit la structure des armatures supportant l'assise et le dossier. Elle apparaît notamment parfaitement compatible avec les sièges dotés d'armatures standards, ce qui s'avère particulièrement avantageux d'un point de vue économique. Cela signifie aussi que l'invention ne remet pas en cause l'intégration de fonctions supplémentaires telles que par exemple le réglage lombaires, le réglage du haut du dossier, le chauffage, la ventilation, la climatisation ou les commandes électriques.It is understood that the invention applies to any type of seat, that is to say regardless of the structure of the frames supporting the seat and backrest. In particular, it appears perfectly compatible with seats fitted with standard fittings, which is particularly advantageous from an economic point of view. This also means that the invention does not call into question the integration of additional functions such as, for example, lumbar adjustment, adjustment of the backrest, heating, ventilation, air conditioning or electrical controls.
Quoi qu'il en soit, l'invention telle qu'ainsi définie présente l'avantage de dissocier les fonctions de verrouillage et de guidage, de sorte que leurs moyens de mise en œuvre respectifs peuvent être dimensionnés indépendamment l'un de l'autre, en fonction uniquement des contraintes qui leur sont propres.In any event, the invention as thus defined has the advantage of separating the locking and guiding functions, so that their respective implementation means can be dimensioned independently of one another. , depending solely on the constraints specific to them.
Les moyens de guidage utilisés vont certes participer au soutien du siège en position d'utilisation, mais ils ne vont en aucun cas en assurer l'immobilisation. Ils n'ont donc pas besoin d'être surdimensionnés afin de pouvoir résister aux contraintes mécaniques les plus importantes, à savoir les forces générées en cas de collision du véhicule.The guiding means used will certainly participate in the support of the seat in the use position, but they will not in any case to ensure immobilization. They therefore do not need to be oversized in order to withstand the most important mechanical stresses, ie the forces generated in the event of collision of the vehicle.
Ce sont les moyens de verrouillage qui vont assurer seuls l'immobilisation du siège, en réalisant un verrouillage de l'assise directement sur le soubassement. En cas de choc, une telle architecture permet de transmettre les efforts mécaniques au plancher du véhicule sans solliciter les moyens de guidage, simplement en les faisant transiter en ligne directe de l'assise au soubassement.It is the locking means that will ensure only the immobilization of the seat, realizing a locking of the seat directly on the base. In case of shock, such an architecture makes it possible to transmit the mechanical forces to floor of the vehicle without soliciting the guide means, simply by passing them in a direct line from the seat to the base.
Un autre intérêt de ce type d'architecture est qu'il présente une grande facilité d'adaptation. Il s'avère en effet possible d'ajuster la hauteur d'un siège escamotable en fonction de la dénivellation effective d'un plancher de véhicule, simplement en modifiant les dimensions du soubassement qui demeure un élément peu compliqué à adapter en terme de tenue mécanique. Cela permet d'éviter une redéfinition systématique des moyens de guidage qui peuvent alors être standardisés dès lors qu'un dimensionnement structurel adéquat a été calculé.Another advantage of this type of architecture is that it is very easy to adapt. It is indeed possible to adjust the height of a retractable seat according to the effective unevenness of a vehicle floor, simply by changing the dimensions of the base which remains an uncomplicated element to adapt in terms of mechanical strength . This makes it possible to avoid a systematic redefinition of the guide means which can then be standardized once an adequate structural dimensioning has been calculated.
Le siège escamotable selon l'invention présente par ailleurs l'avantage d'améliorer considérablement le confort du passager assis directement derrière. Le fait que l'assise et ses moyens de guidage aient tendance à être positionnés très en hauteur par rapport au soubassement, libère en effet un maximum de place pour les pieds du passager en question.The retractable seat according to the invention also has the advantage of greatly improving the comfort of the passenger sitting directly behind. The fact that the seat and its guide means tend to be positioned very high relative to the base, indeed releases a maximum of room for the feet of the passenger in question.
La présente invention concerne également les caractéristiques qui ressortiront au cours de la description qui va suivre, et qui devront être considérées isolément ou selon toutes leurs combinaisons techniques possibles.The present invention also relates to the features which will emerge during the following description, which should be considered in isolation or in all their possible technical combinations.
Cette description, donnée à titre d'exemple non limitatif, est destinée à mieux faire comprendre en quoi consiste l'invention et comment elle peut être réalisée. Elle est par ailleurs donnée en référence aux dessins annexés dans lesquels: La figure 1 illustre la structure interne d'un siège escamotable conforme à l'invention.This description, given by way of non-limiting example, is intended to better understand what the invention is and how it can be achieved. It is also given with reference to the accompanying drawings in which: Figure 1 illustrates the internal structure of a retractable seat according to the invention.
La figure 2 est un éclaté montrant le siège escamotable en perspective arrière.Figure 2 is an exploded showing the retractable seat in rear perspective.
La figure 3 représente un élément des moyens de verrouillage servant à immobiliser l'assise du siège escamotable. La figure 4 est un éclaté du siège escamotable, en vue de dessous.Figure 3 shows an element of the locking means for immobilizing the seat of the retractable seat. Figure 4 is an exploded retractable seat, seen from below.
La figure 5 constitue une vue similaire à la figure 2, mais en perspective avant. Les figures 6 à 10 sont des vues de côté en transparence partielle, qui illustrent la cinématique du siège escamotable détaillé aux figures 1 à 5.Figure 5 is a view similar to Figure 2, but in front perspective. Figures 6 to 10 are partially transparent side views, which illustrate the kinematics of the retractable seat detailed in Figures 1 to 5.
La figure 6 représente plus particulièrement le siège escamotable verrouillé en position d'utilisation. La figure 7 montre le siège escamotable déverrouillé en position d'utilisation, c'est-à-dire en début de phase de déplacement vers la position de stockage.Figure 6 shows more particularly the retractable seat locked in the use position. Figure 7 shows the retractable seat unlocked in the use position, that is to say at the beginning of the displacement phase to the storage position.
La figure 8 fait apparaître le siège escamotable en cours de déplacement de la position d'utilisation à la position de stockage.Figure 8 shows the retractable seat during movement from the use position to the storage position.
La figure 9 présente le siège escamotable en fin de déplacement de la position d'utilisation à la position de stockage, c'est-à-dire déverrouillé en position de stockage.FIG. 9 shows the retractable seat at the end of displacement from the use position to the storage position, that is to say unlocked in the storage position.
La figure 10 illustre le siège escamotable verrouillé en position de stockageFigure 10 illustrates the retractable seat locked in storage position
Pour des raisons de clarté, les mêmes éléments ont été désignés par des références identiques. De même, seuls les éléments essentiels pour la compréhension de l'invention ont été représentés, et ceci sans respect de l'échelle et de manière schématique.For the sake of clarity, the same elements have been designated by identical references. Likewise, only the essential elements for understanding the invention have been represented, and this without regard to the scale and in a schematic manner.
La figure 1 illustre un siège escamotable 1 de véhicule automobile, qui est destiné à prendre place au second rang d'un habitacle, c'est-à-dire juste derrière les sièges avants. On observe que pour des raisons de clarté, seule sa structure interne a été représentée sur cette première illustration.Figure 1 illustrates a retractable seat 1 of a motor vehicle, which is intended to take place in the second row of a passenger compartment, that is to say just behind the front seats. It is observed that for the sake of clarity, only its internal structure has been represented in this first illustration.
De manière tout à fait classique, le siège escamotable 1 est essentiellement composé d'une assise 10 sur laquelle est articulé un dossier 20 réglable en inclinaison ; le tout étant monté sur un soubassement 30 qui est voué à être solidarisé au plancher du véhicule.In a quite conventional manner, the retractable seat 1 is essentially composed of a seat 10 on which is articulated a backrest 20 adjustable in inclination; the whole being mounted on a base 30 which is intended to be secured to the floor of the vehicle.
Ainsi qu'on peut le voir plus en détail aux figures 2 à 5, l'assise 10 est composée d'une mousse 11 qui est supportée par une armature métallique 12 consistant en un assemblage d'une traverse avant 13, d'une traverse arrière 14, ainsi que de deux flasques 15, 16. Une nappe d'assise 17 est par ailleurs tendue entre la traverse avant 13 et la traverse arrière 14, de manière à supporter la mousse 11 dans la zone centrale de l'assise 10. Il est à noter que la partie supérieure de la traverse avant 13 présente une forme bombée, afin de constituer une bosse anti- soumarinage susceptible d'éviter aux personnes de petites tailles de glisser sous la ceinture de sécurité lors d'un choc frontal.As can be seen in more detail in Figures 2 to 5, the seat 10 is composed of a foam 11 which is supported by a metal frame 12 consisting of an assembly of a front cross member 13, a cross member rear 14, and two flanges 15, 16. A seat sheet 17 is also stretched between the front cross member 13 and the rear cross member 14, so as to support the foam 11 in the central area of the seat 10. It should be noted that the upper portion of the front cross member 13 has a convex shape to form an anti bump - submarine that can prevent small people from sliding under the seat belt during a frontal impact.
La structure du dossier 20 résulte également de l'association d'une mousse 21 et d'une armature métallique 22. Mais cette dernière est essentiellement constituée d'un cadre tubulaire 23 sur lequel sont fixés un treillis 24 chargé de soutenir la mousse 21 dans la zone centrale du dossier 20, ainsi que deux flasques 25, 26 qui sont reliés aux deux flasques d'assise 15, 16 par des liaisons pivots. Une tablette 27 est par ailleurs solidarisée au dos du dossier 20, afin que ce dernier présente une surface bien plane au niveau du plan de chargement du véhicule, une fois basculé contre l'assise 10.The structure of the back 20 also results from the combination of a foam 21 and a metal armature 22. But this latter essentially consists of a tubular frame 23 on which are fixed a lattice 24 responsible for supporting the foam 21 in the central area of the backrest 20, and two flanges 25, 26 which are connected to the two seat flanges 15, 16 by pivot links. A tablet 27 is also secured to the back of the backrest 20, so that the latter has a flat surface at the level of the loading plane of the vehicle, once tilted against the seat 10.
Le soubassement 30 comporte quant à lui deux équerres 31, 32 qui sont solidarisées rigidement entre elles par l'intermédiaire d'un tube de liaison central 33. Chaque équerre 31, 32 est par ailleurs montée sur une glissière mobile 34, 35 qui coopère par coulissement avec une glissière fixe 36, 37 destinée à être fixée au plancher du véhicule. Le but d'un tel agencement est classiquement de pouvoir régler la position longitudinale du siège escamotable 1 dans l'habitacle.The base 30 comprises two brackets 31, 32 which are rigidly secured to one another via a central connecting tube 33. Each bracket 31, 32 is also mounted on a movable slideway 34, 35 which cooperates with each other. sliding with a fixed slide 36, 37 to be fixed to the floor of the vehicle. The purpose of such an arrangement is conventionally to be able to adjust the longitudinal position of the retractable seat 1 in the passenger compartment.
Le caractère escamotable du siège 1 est conféré par un montage mobile de l'assise 10 par rapport au soubassement 30. Cette mobilité s'exerce entre une position d'utilisation dans laquelle l'assise 10 est déployée à distance du plancher afin de pouvoir recevoir un occupant, et une position de stockage dans laquelle elle est descendue au plus près dudit plancher de façon à n'occuper qu'un encombrement minimal.The retractable character of the seat 1 is conferred by a movable mounting of the seat 10 relative to the base 30. This mobility is exerted between a position of use in which the seat 10 is deployed at a distance from the floor in order to receive an occupant, and a storage position in which it has descended closer to said floor so as to occupy only a small footprint.
Le déplacement de l'assise 10 entre la position d'utilisation et la position de stockage est assuré par des moyens de guidage 40 qui se présentent ici sous la forme de quatre bielles 41, 42, 43, 44. Concrètement, on distingue deux bielles avant 41, 42 et deux bielles arrière 43, 44 qui sont, d'une part, montées pivotantes respectivement aux extrémités avant et aux extrémités arrière des équerres 31 , 32, et d'autre part, articulées sensiblement aux quatre coins de l'armature d'assise 12.The displacement of the seat 10 between the position of use and the storage position is provided by guide means 40 which are here in the form of four rods 41, 42, 43, 44. Concretely, there are two connecting rods before 41, 42 and two rear connecting rods 43, 44 which are, on the one hand, pivotally mounted respectively at the front ends and at the rear ends of the brackets 31, 32, and on the other hand, articulated substantially to the four corners of the frame sitting 12.
Conformément à l'objet de la présente invention, le siège escamotable 1 dispose en outre de moyens de verrouillage 50 qui sont en mesure d'immobiliser l'assise 10 en bloquant son déplacement au niveau directement du soubassement 30, c'est-à-dire de manière complètement indépendante des moyens de guidage 40.According to the object of the present invention, the retractable seat 1 also has locking means 50 which are able to immobilize the seat 10 by blocking its movement directly from the base 30, that is to say say completely independently of the guide means 40.
II serait parfaitement envisageable de concevoir des moyens de verrouillageIt would be perfectly conceivable to design locking means
50 capables d'immobiliser l'assise 10 dans n'importe quelle position intermédiaire entre la position d'utilisation et la position de stockage. Toutefois, il est surtout indispensable que les moyens de verrouillage 50 soient à même d'immobiliser l'assise 10 au moins en position d'utilisation.50 capable of immobilizing the seat 10 in any intermediate position between the use position and the storage position. However, it is especially essential that the locking means 50 are able to immobilize the seat 10 at least in the position of use.
Cependant, il s'avère également particulièrement avantageux que les moyens de verrouillage 50 soient en outre capables d'immobiliser l'assise 10 en position de stockage, comme c'est précisément le cas dans le mode particulier de réalisation qui a été choisi à titre d'exemple pour illustrer l'invention. Cette caractéristique permet en effet de maintenir le siège 1 à proximité du plancher, et ainsi d'éviter les bruits parasites lors du roulage du véhicule, voire même les mouvements intempestifs au passage d'une bosse ou d'une saignée.However, it is also particularly advantageous that the locking means 50 are also capable of immobilizing the seat 10 in the storage position, as is precisely the case in the particular embodiment which has been chosen for example to illustrate the invention. This feature makes it possible to maintain the seat 1 near the floor, and thus to avoid unwanted noise during the rolling of the vehicle, or even untimely movements to the passage of a bump or a bleed.
Selon une particularité de l'invention, lorsque l'assise 10 du siège 1 est dotée d'un point d'ancrage 60 pour une ceinture de sécurité comme dans l'exemple de réalisation des figures 1 à 10, l'ensemble est de préférence agencé de manière à ce que les moyens de verrouillage 50 soient en mesure de bloquer le déplacement de l'assise 10 au niveau du point d'ancrage 60 en question.According to a feature of the invention, when the seat 10 of the seat 1 is provided with an anchor point 60 for a seat belt as in the embodiment of Figures 1 to 10, the assembly is preferably arranged so that the locking means 50 are able to block the displacement of the seat 10 at the anchor point 60 in question.
La ceinture de sécurité étant principalement chargée de retenir l'occupant du siège en cas de choc frontal, elle va être extrêmement sollicitée dès lors qu'il va s'agir d'encaisser ce type de décélération brutale. Des forces de traction très importantes sont donc susceptibles d'être appliquées au point d'ancrage 60. Il s'avère par conséquent tout à fait pertinent de les dissiper au plus vite dans le plancher du véhicule, en les transmettant directement de l'assise 10 au soubassement 30, c'est-à-dire sans les faire transiter par les moyens de guidage 40.The seatbelt is mainly responsible for retaining the occupant of the seat in the event of frontal impact, it will be extremely sought after it will be to cash this type of sudden deceleration. Very pulling forces Therefore important are likely to be applied to the anchor point 60. It is therefore very relevant to dispel them as quickly as possible in the floor of the vehicle, by transmitting directly from the seat 10 to the base 30, that is to say without passing them through the guide means 40.
Selon une autre particularité également mise en œuvre dans l'exemple de réalisation choisi pour illustrer l'invention, lorsque l'assise 10 du siège 1 est en outre montée basculante vers l'avant par rapport à un axe transversal 70, l'ensemble est de préférence agencé de manière à ce que les moyens de verrouillage 50 soient à même de bloquer le déplacement de l'assise 10 au niveau de l'axe de basculement 70.According to another feature also implemented in the embodiment chosen to illustrate the invention, when the seat 10 of the seat 1 is further mounted to pivot forwardly relative to a transverse axis 70, the assembly is preferably arranged so that the locking means 50 are able to block the displacement of the seat 10 at the level of the tilting axis 70.
Pour des raisons là encore de tenue mécanique, il apparaît avantageux que le blocage s'opère au niveau de la partie de l'assise 10 dont l'amplitude de déplacement est la moins grande. A cet égard, l'axe de basculement 70 constitue une sorte d'optimum.For reasons also of mechanical strength, it appears advantageous that the blocking occurs at the portion of the seat 10, the amplitude of displacement is the smallest. In this respect, the tilting axis 70 constitutes a kind of optimum.
Dans cet exemple de réalisation, c'est l'ensemble formé par l'assise 10 et le dossier 20, qui est monté basculant vers l'avant par rapport au soubassement 30. Cette mobilité est destinée à faciliter le passage derrière le siège escamotable 1, afin par exemple d'accéder à une troisième rangée de sièges. La cinématique retenue consiste schématiquement à baisser le nez d'assise lorsque que le siège 1 est avancé au-delà de ce que permet le classique réglage longitudinal. Il est à noter que de manière traditionnelle, cette opération n'est possible qu'après déverrouillage des glissières mobiles 34, 35 par rapport à glissières fixes 36, 37.In this embodiment, it is the assembly formed by the seat 10 and the backrest 20, which is mounted swinging forwardly relative to the base 30. This mobility is intended to facilitate the passage behind the retractable seat 1 , for example to access a third row of seats. The kinematics adopted consists schematically to lower the seat nose when the seat 1 is advanced beyond what allows the classic longitudinal adjustment. It should be noted that in the traditional way, this operation is possible only after unlocking the movable slides 34, 35 with respect to fixed slides 36, 37.
Concrètement, les bielles avant 41, 42 sont reliées au soubassement 30 par des liaisons pivots coulissantes. Pour cela, leurs parties inférieures sont couplées au moyen d'un tube de liaison 45 dont les extrémités sont en mesure de glisser le long de deux coulisses 38, 39 respectivement ménagées sur les faces internes des deux équerres 31, 32. Le tube de liaison 45 est par ailleurs solidaire d'une sangle 46 qui est rattachée au plancher. L'ensemble est agencé de façon à ce qu'à la manière d'une butée, la sangle 46 retienne le tube de liaison 45 dès lors que l'avancée du siège escamotable 1 dépasse une certaine limite qui est situe en avant de celle relative au réglage longitudinal de l'assise 10. Il en résulte que si l'on poursuit le déplacement du siège 1 encore davantage vers l'avant, les bielles avant 41, 42 vont commencer à se coucher tandis que le tube de liaison 45 va finir par glisser vers l'arrière des coulisses 38, 39. Le nez d'assise 10 va par conséquent basculer progressivement vers le bas, redressant du même coup le dossier 20 dans une position sensiblement verticale et donc moins encombrante. La partie avant de l'assise 10 va quant à elle en quelque sorte pouvoir se glisser sous le dossier du siège avant, augmentant d'autant la course de déplacement vers l'avant du siège escamotable 1.Concretely, the front connecting rods 41, 42 are connected to the underbody 30 by sliding pivot links. For this, their lower parts are coupled by means of a connecting tube 45 whose ends are able to slide along two slides 38, 39 respectively formed on the inner faces of the two brackets 31, 32. The connecting tube 45 is also secured to a strap 46 which is attached to the floor. The assembly is arranged so that in the manner of a stop, the strap 46 retains the connecting tube 45 when the advance of the retractable seat 1 exceeds a certain limit which is located in front of the relative to the longitudinal adjustment of the seat 10. It follows that if we continue moving the seat 1 even further forward, the front rods 41, 42 will begin to lie while the connecting tube 45 will finish by sliding back slides 38, 39. The seat nose 10 will therefore tilt gradually downwards, at the same time straightening the backrest 20 in a substantially vertical position and therefore less bulky. The front portion of the seat 10 is in turn somehow able to slip under the back of the front seat, increasing all the travel movement towards the front of the retractable seat 1.
Dans le mode particulier de réalisation des figures 1 à 10, le siège escamotable 1 dispose à la fois d'un point d'ancrage 60 pour une ceinture de sécurité, et d'une mobilité en basculement par rapport à un axe transversal 70. C'est pourquoi le point d'ancrage 60 et l'axe de basculement 70 en question sont ici confondus avec les parties de l'assise 10 qui coopèrent avec les moyens de verrouillage 50. Cela montre aussi l'importance fondamentale des parties d'assise en question qui doivent servir à la fois de zones de blocage, de zones d'ancrage et de zones de pivotement.In the particular embodiment of Figures 1 to 10, the retractable seat 1 has both an anchor point 60 for a seat belt, and a mobility tilt relative to a transverse axis 70. C This is why the anchoring point 60 and the tilting axis 70 in question here coincide with the parts of the seat 10 which cooperate with the locking means 50. This also shows the fundamental importance of the seat parts. in question which should serve as both locking zones, anchoring zones and pivot zones.
Ainsi qu'on peut le voir clairement notamment aux figures 2 à 5, dans ce mode particulier de réalisation, les moyens de verrouillage 50 comportent de chaque côté du siège 1, un doigt 51 qui est solidaire de l'assise 10, une lumière oblongue 52 qui est ménagée dans le soubassement 30, ainsi qu'un élément de blocage 53 qui est monté pivotant sur ledit soubassement 30. L'ensemble est agencé de manière à ce que lors du déplacement de l'assise 10 entre la position d'utilisation et la position de stockage, le doigt 51 soit à même de parcourir la lumière oblongue 52 entre deux extrémités 52a, 52b correspondent respectivement à ladite position d'utilisation et à ladite position de stockage. Le tout est par ailleurs organisé de telle sorte que la mobilité de l'élément de blocage 53 s'exerce entre une position active dans laquelle il est apte à bloquer le doigt 51 à chaque extrémité 52a, 52b de la lumière oblongue 52, et une position passive dans laquelle il est disposé à l'écart dudit doigt 51.As can be clearly seen in particular in Figures 2 to 5, in this particular embodiment, the locking means 50 comprise on each side of the seat 1, a finger 51 which is secured to the seat 10, an oblong slot 52 which is formed in the base 30, and a locking element 53 which is pivotally mounted on said base 30. The assembly is arranged so that during the displacement of the seat 10 between the position of use and the storage position, the finger 51 is able to traverse the oblong slot 52 between two ends 52a, 52b respectively correspond to said use position and said storage position. The whole is moreover organized in such a way that the mobility of the locking element 53 is exerted between an active position in which it is able to block the finger 51 at each end. 52a, 52b of the oblong slot 52, and a passive position in which it is disposed away from said finger 51.
On observe que la forme de chaque lumière oblongue 52 correspond à la trajectoire parcourue par le doigt 51 qui lui est associé, lorsque l'assise 10 est déplacée entre la position d'utilisation et la position de stockage. Les deux extrémités 52a, 52b de chaque lumière oblongue 52 jouent des rôles de butées vis- à-vis du doigt 51 associé, en limitant le déplacement de l'assise 10 entre deux extrêmes qui correspondent respectivement à la position d'utilisation et à la position de stockage.It is observed that the shape of each oblong slot 52 corresponds to the path traveled by the finger 51 associated therewith, when the seat 10 is moved between the position of use and the storage position. The two ends 52a, 52b of each oblong slot 52 act as abutments with respect to the associated finger 51, limiting the displacement of the seat 10 between two extremes which respectively correspond to the position of use and to the storage position.
Même si cela n'apparaît pas sur les différentes figures, les moyens de verrouillage 50 sont en outre pourvus de moyens de rappel élastique qui entraînent en permanence chaque élément de blocage 53 en position active.Although this does not appear in the various figures, the locking means 50 are further provided with elastic return means which permanently drive each locking element 53 in the active position.
Cette caractéristique permet de générer un blocage automatique de chaque doigt 51 lorsqu'il arrive à une extrémité 52a, 52b de la lumière oblongue 52 qui lui est associée. Il est ainsi possible d'immobiliser l'assise 10 en position d'utilisation ou en position de stockage, sans que l'utilisateur n'ait à effectuer une quelconque action de verrouillage. Bien entendu, cette fonction de rappel peut être réalisée par tout moyen de rappel élastique connu de l'état de la technique.This characteristic makes it possible to generate an automatic locking of each finger 51 when it reaches an end 52a, 52b of the oblong slot 52 associated therewith. It is thus possible to immobilize the seat 10 in the use position or in the storage position, without the user having to perform any locking action. Of course, this return function can be performed by any elastic return means known from the state of the art.
Dans le cas où comme ici, l'immobilisation de l'assise 10 s'opère grâce à des moyens de verrouillage 50 officiant de chaque côté du siège escamotable 1, il est avantageusement prévu des moyens de liaison 54 couplant le pivotement des deux éléments de blocage 53 mis enjeu.In the case where, as here, the immobilization of the seat 10 is effected by locking means 50 officiating on each side of the retractable seat 1, it is advantageously provided connecting means 54 coupling the pivoting of the two elements of blocking 53 put at stake.
L'objectif est bien évidemment d'obtenir une véritable simultanéité de mise en œuvre des élément de blocage 53, afin de faciliter les opérations de verrouillage et de déverrouillage de l'assise 10. Dans cet exemple de réalisation, les moyens de liaison 54 se présentent sous la forme d'une barre de conjugaison. Il est par ailleurs entendu que la présence de moyens de verrouillage 50 de chaque côté du siège escamotable 1 constitue un mode de réalisation préféré de l'invention, étant donné qu'il permet de garantir une immobilisation parfaite de l'assise 10 de par la symétrie d'un tel agencement. Toutefois, il serait parfaitement envisageable de concevoir une variante équipée de moyens de verrouillage 51 que d'un seul côté du siège escamotable 1.The objective is obviously to obtain a true simultaneity of implementation of the blocking element 53, to facilitate the operations of locking and unlocking the seat 10. In this embodiment, the connection means 54 is present in the form of a conjugation bar. It is furthermore understood that the presence of locking means 50 on each side of the retractable seat 1 constitutes a preferred embodiment of the invention, since it makes it possible to guarantee perfect immobilization of the seat 10 by the symmetry of such an arrangement. However, it would be perfectly conceivable to design a variant equipped with locking means 51 only on one side of the retractable seat 1.
Selon une autre particularité de l'invention, le siège escamotable 1 est en outre doté de moyens de commande 80 qui sont en mesure d'actionner les moyens de verrouillage 50 depuis l'assise 10.According to another feature of the invention, the retractable seat 1 is further provided with control means 80 which are able to actuate the locking means 50 from the seat 10.
Dans cet exemple de réalisation, les moyens de commande 80 sont aptes à entraîner chaque élément de blocage 53 en position passive.In this embodiment, the control means 80 are able to drive each blocking element 53 in the passive position.
Cette caractéristique se conjugue avantageusement avec celle précédemment décrite, relative aux moyens de rappel élastique qui entraînent en permanence chaque élément de blocage 53 en position active. Cela signifie en d'autres termes que les moyens de commande 80 n'auront à être mis en œuvre que pour déverrouiller l'assise 10 ; le verrouillage s'opérant par défaut de manière automatique.This characteristic is advantageously combined with that previously described, relating to the elastic return means which permanently drive each locking element 53 in the active position. This means in other words that the control means 80 will have to be implemented only to unlock the seat 10; the lock is automatically activated by default.
Concrètement, les moyens de commande 80 comprennent ici un levier 81 qui est monté pivotant sur l'assise 10 autour d'un doigt 51 des moyens de verrouillageSpecifically, the control means 80 here comprise a lever 81 which is pivotally mounted on the seat 10 around a finger 51 of the locking means
50. Ce levier 81 supporte par ailleurs un plot saillant 82 qui est à même de coulisser le long d'une lumière 83 ménagée sur l'élément de blocage 53 associé audit doigt 51.50. This lever 81 also supports a projecting stud 82 which is able to slide along a slot 83 formed on the locking element 53 associated with said finger 51.
L'utilisation d'une liaison pivot coulissante, pour relier le levier 81 et l'élément de blocage 53, permet de garantir le couplage entre ces deux éléments malgré leur mobilité relative. Bien entendu, les dimensions et l'orientation de la lumière 83 seront fonction de la cinématique de déplacement de l'assise 10 par rapport au soubassement 30. Conformément à une variante de réalisation de l'invention, le siège escamotable 1 peut également être pourvu de moyens de commande 80 capables d'actionner les moyens de verrouillage 50 depuis le dossier 20.The use of a sliding pivot link, to connect the lever 81 and the locking element 53, ensures the coupling between these two elements despite their relative mobility. Of course, the dimensions and the orientation of the light 83 will be a function of the kinematics of displacement of the seat 10 relative to the base 30. According to an alternative embodiment of the invention, the retractable seat 1 can also be provided with control means 80 capable of actuating the locking means 50 from the backrest 20.
Dans une telle hypothèse, les moyens de commande 80 peuvent de manière particulièrement avantageuse être constitués directement par le dossier 20 dont le pivotement est en mesure d'actionner les moyens de verrouillage 50.In such a case, the control means 80 may particularly advantageously be constituted directly by the backrest 20 whose pivoting is able to actuate the locking means 50.
Les figures 6 à 10 illustrent plus particulièrement la cinématique d'escamotage du siège escamotable 1.Figures 6 to 10 illustrate more particularly the retraction kinematics of the retractable seat 1.
Ainsi qu'on peut le voir à la figure 6, lorsque le siège escamotable 1 est en position d'utilisation, l'assise 10 est déployée en hauteur de manière à pouvoir recevoir un passager, et elle est immobilisée par l'action des moyens de verrouillage 50. Chaque doigt 51 est en effet bloqué à l'extrémité supérieure 52a de la lumière 52 correspondante, par un élément de blocage 53 qui est placé en position active.As can be seen in Figure 6, when the retractable seat 1 is in the position of use, the seat 10 is deployed in height so as to receive a passenger, and it is immobilized by the action of the means 50. Each finger 51 is indeed blocked at the upper end 52a of the corresponding slot 52, by a blocking element 53 which is placed in the active position.
La figure 7 montre quant à elle le déverrouillage du siège escamotable 1. L'assise 10 est toujours en position d'utilisation, mais les moyens de commande 80 ont été actionnés pour désactiver les moyens de verrouillage 50. Dans les faits, le pivotement du levier 81 a entraîné le basculement de chaque élément de blocage 53 de la position active à la position passive, libérant ainsi la mobilité de chaque doigt 51. L'assise 10 est alors prête à être déplacée vers la position de stockage.FIG. 7 shows the unlocking of the retractable seat 1. The seat 10 is still in the use position, but the control means 80 have been actuated to deactivate the locking means 50. In fact, the pivoting of the seat lever 81 has caused each blocking element 53 to shift from the active position to the passive position, thus freeing the mobility of each finger 51. The seat 10 is then ready to be moved to the storage position.
Conformément à la figure 8, le déplacement de l'assise 10 de la position d'utilisation vers la position de stockage est réalisé sous le contrôle des moyens de guidage 40. Concrètement, la descente de l'assise 10 s'opère par simple gravité en décrivant une trajectoire circulaire, du fait du basculement simultané des bielles avant 41, 42 et des bielles arrière 43, 44. Durant ce mouvement, les doigts 51 parcourent librement les lumières 52 étant donné que durant cette phase, les moyens de verrouillage 50 sont inopérants bien que les élément de blocage 53 aient retrouvé la position active sous l'action des moyens de rappel élastique qui leur sont associés. Les moyens de commande 80 demeurent quant à eux au repos.According to Figure 8, the displacement of the seat 10 from the use position to the storage position is achieved under the control of the guide means 40. Concretely, the descent of the seat 10 operates by simple gravity by describing a circular trajectory, due to the simultaneous tilting of the front connecting rods 41, 42 and the rear connecting rods 43, 44. During this movement, the fingers 51 freely traverse the lights 52 since during this phase, the locking means 50 are inoperative although blocking elements 53 have found the active position under the action of elastic return means associated with them. The control means 80 remain resting.
La figure 9 illustre le siège escamotable 1 au moment où il arrive en position de stockage. L'assise 10 atteint sa position la plus basse, mais elle n'est pas encore verrouillée. Les éléments de blocage 53 ont été déplacés en position passive par la simple poussée exercée par les doigts 51 à la fin de leur déplacement, c'est-à-dire sans que les moyens de commande 80 n'aient été activés.Figure 9 illustrates the retractable seat 1 when it arrives in the storage position. The seat 10 reaches its lowest position, but it is not yet locked. The locking elements 53 have been moved to the passive position by the simple thrust exerted by the fingers 51 at the end of their movement, that is to say without the control means 80 have been activated.
Sur la figure 10, le siège escamotable 1 apparaît enfin verrouillé en position de stockage. Les éléments de blocage 53 ont retrouvé leur position active toujours sans intervention de l'utilisateur, du fait uniquement de l'action des moyens de rappel élastique associés. Les doigts 51 sont alors bloqués aux extrémités inférieures 52b des lumières 52, immobilisant ainsi parfaitement l'assise 10 au plus près du plancher du véhicule.In Figure 10, the retractable seat 1 finally appears locked in the storage position. The blocking elements 53 have found their active position always without user intervention, due solely to the action of the associated elastic return means. The fingers 51 are then locked at the lower ends 52b of the lights 52, thus perfectly immobilizing the seat 10 as close to the floor of the vehicle.
Le redéploiement de siège 1 s'effectuant de manière sensiblement inverse à son escamotage, il ne sera pas décrit davantage ici. On précisera simplement qu'une action musculaire sera cette fois nécessaire pour relever l'assise 10 et plus généralement l'ensemble du siège escamotable 1.The redeployment of seat 1 being performed substantially the opposite to its retraction, it will not be described further here. It will be specified simply that a muscular action will be necessary this time to raise the seat 10 and more generally the entire retractable seat 1.
Bien entendu, l'invention concerne tout véhicule automobile doté d'au moins un siège escamotable 1 tel que précédemment décrit. Of course, the invention relates to any motor vehicle with at least one retractable seat 1 as previously described.

Claims

REVENDICATIONS
1. Siège escamotable (1) notamment pour véhicule automobile, comportant une assise (10) montée mobile en déplacement par rapport à un soubassement (30) entre une position d'utilisation et une position de stockage, un dossier (20) monté pivotant par rapport à l'assise (10), ainsi que des moyens de guidage (40) du déplacement de l'assise (10) entre la position d'utilisation et la position de stockage, caractérisé en ce qu'il comporte en outre des moyens de verrouillage (50) aptes à bloquer le déplacement de l'assise (10) directement sur le soubassement (30), indépendamment des moyens de guidage (40).1. Retractable seat (1) especially for a motor vehicle, comprising a seat (10) mounted movably in movement relative to a base (30) between a position of use and a storage position, a backrest (20) pivotally mounted by relative to the seat (10), as well as means (40) for guiding the displacement of the seat (10) between the position of use and the storage position, characterized in that it further comprises means locking device (50) capable of blocking the displacement of the seat (10) directly on the underbody (30), independently of the guide means (40).
2. Siège escamotable (1) selon la revendication 1, caractérisé en ce que les moyens de verrouillage (50) sont aptes à immobiliser l'assise (10) au moins en position d'utilisation.2. retractable seat (1) according to claim 1, characterized in that the locking means (50) are adapted to immobilize the seat (10) at least in the use position.
3. Siège escamotable (1) selon l'une des revendications 1 ou 2, caractérisé en ce que les moyens de verrouillage (50) sont aptes à immobiliser l'assise (10) en position de stockage.3. Retractable seat (1) according to one of claims 1 or 2, characterized in that the locking means (50) are adapted to immobilize the seat (10) in the storage position.
4. Siège escamotable (1) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'assise (10) comportant un point d'ancrage (60) pour une ceinture de sécurité, les moyens de verrouillage (50) sont aptes bloquer le déplacement de ladite assise (10) au niveau dudit point d'ancrage (60).4. retractable seat (1) according to any one of claims 1 to 3, characterized in that the seat (10) having an anchor point (60) for a seat belt, the locking means (50) are able to block the displacement of said seat (10) at said anchor point (60).
5. Siège escamotable (1) selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'assise (10) étant en outre montée basculante vers l'avant par rapport à un axe transversal (70), les moyens de verrouillage (50) sont aptes à bloquer le déplacement de ladite assise (10) au niveau dudit axe de basculement (70). 5. retractable seat (1) according to any one of claims 1 to 4, characterized in that the seat (10) is further mounted swingably forward relative to a transverse axis (70), the means of locking (50) are able to block the displacement of said seat (10) at said tilt axis (70).
6. Siège escamotable (1) selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les moyens de verrouillage (50) comportent au niveau d'au moins un côté du siège (1), un doigt (51) solidaire de l'assise (10), une lumière oblongue (52) ménagée dans le soubassement (30), ainsi qu'un élément de blocage (53) monté pivotant sur ledit soubassement (30), en ce que lors du déplacement de l'assise (10) entre la position d'utilisation et la position de stockage, le doigt (51) est apte à parcourir la lumière oblongue (52) entre deux extrémités (52a, 52b) correspondent respectivement à ladite position d'utilisation et à ladite position de stockage, et en ce que la mobilité de l'élément de blocage (53) s'exerce entre une position active dans laquelle il est apte à bloquer le doigt (51) à chaque extrémité de la lumière oblongue (52), et une position passive dans laquelle il est disposé à l'écart dudit doigt (51).6. retractable seat (1) according to any one of claims 1 to 5, characterized in that the locking means (50) comprise at least one side of the seat (1), a finger (51) secured to a seat (10), an oblong slot (52) formed in the base (30), and a locking element (53) pivotally mounted on said base (30), in that during movement of the seat (10) between the position of use and the storage position, the finger (51) is able to traverse the oblong slot (52) between two ends (52a, 52b) corresponding respectively to said position of use and to said storage position, and in that the mobility of the locking element (53) is exerted between an active position in which it is able to lock the finger (51) at each end of the oblong slot (52), and a passive position in which it is disposed away from said finger (51).
7. Siège escamotable (1) selon la revendication 6, caractérisé en ce que les moyens de verrouillage (50) comportent en outre des moyens de rappel élastique aptes à entraîner chaque élément de blocage (53) en position active.7. retractable seat (1) according to claim 6, characterized in that the locking means (50) further comprise elastic return means adapted to drive each locking element (53) in the active position.
8. Siège escamotable (1) selon l'une des revendications 6 ou 7, caractérisé en ce que des moyens de verrouillage (50) étant ménagés de chaque coté de l'assise8. retractable seat (1) according to one of claims 6 or 7, characterized in that locking means (50) being formed on each side of the seat
(10), il comporte en outre des moyens de liaison (54) couplant le pivotement des deux éléments de blocage (53).(10), it further comprises connecting means (54) coupling the pivoting of the two locking elements (53).
9. Siège escamotable (1) selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il comporte des moyens de commande (80) aptes à actionner les moyens de verrouillage (50) depuis l'assise (10).9. retractable seat (1) according to any one of claims 1 to 8, characterized in that it comprises control means (80) adapted to actuate the locking means (50) from the seat (10).
10. Siège escamotable (1) selon la revendication 9, caractérisé en ce que les moyens de commande (80) sont aptes à entraîner chaque élément de blocage (53) en position passive. 10. Retractable seat (1) according to claim 9, characterized in that the control means (80) are adapted to drive each blocking element (53) in the passive position.
11. Siège escamotable (1) selon l'une des revendications 9 ou 10, caractérisé en ce que les moyens de commande (80) comportent un levier (81) qui est monté pivotant sur l'assise (10) autour d'un doigt (51) des moyens de verrouillage (50), et qui supporte un plot saillant (82) apte à coulisser le long d'une lumière (83)11. retractable seat (1) according to one of claims 9 or 10, characterized in that the control means (80) comprise a lever (81) which is pivotally mounted on the seat (10) around a finger (51) locking means (50), and which supports a projecting stud (82) slidable along a light (83)
5 ménagée sur l'élément de blocage (53) qui est associé audit doigt (51).5 formed on the locking element (53) which is associated with said finger (51).
12. Siège escamotable (1) selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il comporte des moyens de commande (80) aptes à actionner les moyens de verrouillage (50) depuis le dossier (20).12. retractable seat (1) according to any one of claims 1 to 8, characterized in that it comprises control means (80) adapted to actuate the locking means (50) from the backrest (20).
1010
13. Siège escamotable (1) selon l'une quelconque des revendications 1 à 12, caractérisé en ce que les moyens de commande (80) sont constitués par le dossier (20) dont le pivotement est apte à actionner les moyens de verrouillage (50).13. Retractable seat (1) according to any one of claims 1 to 12, characterized in that the control means (80) are constituted by the backrest (20) whose pivoting is adapted to actuate the locking means (50). ).
15 14. Véhicule automobile, caractérisé en ce qu'il comporte au moins un siège escamotable (1) selon l'une quelconque des revendications précédentes. 14. Motor vehicle, characterized in that it comprises at least one retractable seat (1) according to any one of the preceding claims.
PCT/FR2008/050828 2007-06-11 2008-05-14 Stowable seat, in particular for a motor vehicle WO2008152270A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08805776A EP2152540A2 (en) 2007-06-11 2008-05-14 Stowable seat, in particular for a motor vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0755643 2007-06-11
FR0755643A FR2917024B1 (en) 2007-06-11 2007-06-11 RECOVERABLE SEAT, IN PARTICULAR FOR A MOTOR VEHICLE

Publications (2)

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WO2008152270A2 true WO2008152270A2 (en) 2008-12-18
WO2008152270A3 WO2008152270A3 (en) 2009-03-05

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PCT/FR2008/050828 WO2008152270A2 (en) 2007-06-11 2008-05-14 Stowable seat, in particular for a motor vehicle

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FR (1) FR2917024B1 (en)
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CN111565970A (en) * 2018-02-20 2020-08-21 大有控股株式会社 Seat device for vehicle

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
ES2398570B1 (en) * 2011-03-22 2014-01-21 Viza Automoción, S.A.U. FOLDING SEAT FOR VEHICLES.

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US6059345A (en) * 1998-06-18 2000-05-09 Tachi-S Co., Ltd. Slide rail device for vehicle seat
US20030030312A1 (en) * 2001-08-10 2003-02-13 Faurecia Autositze Gmbh & Co. Kg Rear seat for vehicles
EP1470954A1 (en) * 2003-03-31 2004-10-27 Renault s.a.s. Vehicle seat
WO2006053657A1 (en) * 2004-11-21 2006-05-26 Bayerische Motorenwerke Ag Vehicle seat in particular motor vehicle seat

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Publication number Priority date Publication date Assignee Title
US6059345A (en) * 1998-06-18 2000-05-09 Tachi-S Co., Ltd. Slide rail device for vehicle seat
US20030030312A1 (en) * 2001-08-10 2003-02-13 Faurecia Autositze Gmbh & Co. Kg Rear seat for vehicles
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WO2006053657A1 (en) * 2004-11-21 2006-05-26 Bayerische Motorenwerke Ag Vehicle seat in particular motor vehicle seat

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Publication number Priority date Publication date Assignee Title
CN111565970A (en) * 2018-02-20 2020-08-21 大有控股株式会社 Seat device for vehicle

Also Published As

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FR2917024B1 (en) 2010-01-01
EP2152540A2 (en) 2010-02-17
WO2008152270A3 (en) 2009-03-05
FR2917024A1 (en) 2008-12-12

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