FR2921599A1 - Motor vehicle seat, has armature with upper part folded towards front so as to be entered in plane parallel to another plane, where zone of armature between planes forms top deflection zone that allows energy absorption - Google Patents

Motor vehicle seat, has armature with upper part folded towards front so as to be entered in plane parallel to another plane, where zone of armature between planes forms top deflection zone that allows energy absorption Download PDF

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Publication number
FR2921599A1
FR2921599A1 FR0706907A FR0706907A FR2921599A1 FR 2921599 A1 FR2921599 A1 FR 2921599A1 FR 0706907 A FR0706907 A FR 0706907A FR 0706907 A FR0706907 A FR 0706907A FR 2921599 A1 FR2921599 A1 FR 2921599A1
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France
Prior art keywords
armature
zone
backrest
seat
motor vehicle
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Granted
Application number
FR0706907A
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French (fr)
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FR2921599B1 (en
Inventor
Fernand Dauchez
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Cera TSC
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Centre dEtude et de Recherche pour lAutomobile CERA
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Priority to FR0706907A priority Critical patent/FR2921599B1/en
Publication of FR2921599A1 publication Critical patent/FR2921599A1/en
Application granted granted Critical
Publication of FR2921599B1 publication Critical patent/FR2921599B1/en
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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
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42709—Seats or parts thereof displaced during a crash involving residual deformation or fracture of the structure
    • 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
    • B60N2/80—Head-rests
    • B60N2/806—Head-rests movable or adjustable
    • B60N2/809—Head-rests movable or adjustable vertically slidable
    • 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
    • B60N2/80—Head-rests
    • B60N2/888—Head-rests with arrangements for protecting against abnormal g-forces, e.g. by displacement of the head-rest

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)

Abstract

The seat (1) has a headrest cushion (3) associated to a backrest (2) by a reversed U shaped metallic armature (4), where the seat has a minimal dimension (6) of 600 mm. The armature has a part (5) projecting from top of a structure of the backrest. The armature has an upper part (7) folded towards front so as to be entered in a plane parallel to a plane defined by a lower part of branches of the armature. A zone of the armature between the planes forms a top deflection zone (8) that allows energy absorption and is complementary to a bottom deflection zone (10).

Description

L'invention concerne un siège de véhicule automobile. The invention relates to a motor vehicle seat.

Il est connu de réaliser un siège de véhicule automobile comprenant un dossier et un coussin d'appui-tête, ledit coussin étant associé audit dossier au moyen d'une armature métallique présentant une partie saillante depuis le haut de la structure dudit dossier, ledit siège présentant une cote minimale, mesurée suivant la ligne de torse, de 600 mm entre son point H et le haut de ladite structure de dossier, ladite armature présentant une forme générale de U renversé. It is known to make a motor vehicle seat comprising a backrest and a headrest cushion, said cushion being associated with said backrest by means of a metal frame having a portion projecting from the top of the structure of said backrest, said seat having a minimum dimension, measured along the torso line, of 600 mm between its point H and the top of said backrest structure, said armature having a generally u-shaped overturned shape.

On rappelle que le point H d'un siège de véhicule automobile est le point correspondant à l'articulation jambes/tronc du passager. C'est un point normalisé servant de point de référence pour définir la géométrie du siège. It is recalled that the H point of a motor vehicle seat is the point corresponding to the leg / trunk joint of the passenger. It is a standardized point used as a reference point for defining the geometry of the seat.

Des sièges présentant une telle cote minimale ont une hauteur de dossier supérieure à celles usuellement mises en jeu, généralement comprises entre 530 et 570 mm. Ils équipent par exemple des véhicules de type cabriolet décapotable, notamment sur les places arrière où le haut de dossier doit recouvrir des éléments périphériques structurels disposés en hauteur. Seats having such a minimum dimension have a higher backrest than those usually used, generally between 530 and 570 mm. They equip such convertible cabriolet type vehicles, especially in the rear seats where the backrest must cover structural peripheral elements arranged in height.

Le coussin d'appui-tête est alors disposé à une distance plus proche du haut de la structure de dossier que dans les véhicules usuels, la partie saillante étant raccourcie par rapport aux réalisations usuelles. The headrest cushion is then disposed at a distance closer to the top of the backrest structure than in conventional vehicles, the projecting portion being shortened compared to conventional embodiments.

En cas de choc de la tête du passager contre le coussin, l'absorption d'énergie se fait par flexion de la partie saillante, en particulier dans une zone de fléchissement basse disposée au niveau du haut de la structure du dossier. In case of shock of the head of the passenger against the cushion, the energy absorption is done by bending of the projecting part, in particular in a low deflection zone disposed at the top of the structure of the backrest.

Dans le cas où la partie saillante est raccourcie, c'est à dire dans le cas de dossiers hauts, le bras de levier pour la faire fléchir est plus court, ce qui occasionne une décélération plus importante de la tête du passager lors d'un choc, entraînant des risques de lésions irréversibles. In the case where the protruding portion is shortened, that is to say in the case of high backs, the lever arm to bend is shorter, which causes a greater deceleration of the passenger's head during a shock, leading to the risk of irreversible damage.

Qui plus est, pour des passager de petite taille, la tête risque d'être positionnée sensiblement à l'aplomb du haut de la structure du dossier, ce qui enlève tout effet de levier en vue de faire fléchir la partie saillante et entraîne en outre un risque que la tête du passager heurte le haut de la structure de dossier, par exemple au niveau de moyens de réception rigides de l'armature. Moreover, for small passengers, the head may be positioned substantially perpendicular to the top of the backrest structure, which eliminates any leverage to bend the protruding portion and further causes a risk that the head of the passenger strikes the top of the backrest structure, for example at rigid receiving means of the frame.

On notera en outre que dans les véhicules du type sus mentionné, la partie saillante peut se trouver devant une structure de sécurité très rigide, telle qu'un anneau de sécurité pour protéger les passagers en cas de retournement du véhicule, positionné à une très faible distance, par exemple de l'ordre de 20 mm, ladite partie saillante venant heurter ladite structure de sécurité lors de son fléchissement, ce qui entraîne une décélération très importante de la tête du passager, préjudiciable à sa sécurité. Note also that in vehicles of the type mentioned above, the protruding portion may be in front of a very rigid safety structure, such as a safety ring to protect the passengers in case of reversal of the vehicle, positioned at a very low distance, for example of the order of 20 mm, said projecting portion striking said safety structure during its deflection, resulting in a very significant deceleration of the passenger's head, detrimental to its safety.

L'invention a pour but de pallier ces inconvénients. The invention aims to overcome these disadvantages.

A cet effet, et selon un premier aspect, l'invention propose un siège de véhicule automobile comprenant un dossier et un coussin d'appui-tête, ledit coussin étant associé audit dossier au moyen d'une armature présentant une partie saillante depuis le haut de la structure dudit dossier, ledit siège présentant une cote minimale de 600 mm entre son point H et le haut de ladite structure de dossier, ladite armature présentant une forme générale de U renversé dont la partie supérieure est repliée vers l'avant de sorte à être inscrite dans un plan sensiblement parallèle au plan défini par la partie inférieure des branches du U, la zone d'armature entre lesdits plans formant zone de fléchissement haute permettant une absorption d'énergie. For this purpose, and according to a first aspect, the invention provides a motor vehicle seat comprising a backrest and a headrest cushion, said cushion being associated with said backrest by means of a frame having a protruding portion from above the structure of said backrest, said seat having a minimum dimension of 600 mm between its point H and the top of said backrest structure, said armature having a generally U-shaped overturned, the upper part of which is folded forward so as to be inscribed in a plane substantially parallel to the plane defined by the lower part of the branches of the U, the reinforcement area between said planes forming a high deflection zone for energy absorption.

Dans cette description, les termes de positionnement dans l'espace (haut, supérieur, inférieur, avant, longitudinal,...) sont pris en référence au siège disposé dans le véhicule. In this description, the positioning terms in space (top, top, bottom, front, longitudinal, ...) are taken in reference to the seat disposed in the vehicle.

Dans l'agencement proposé, l'armature est pourvue d'une zone de fléchissement haute complémentaire à la zone de fléchissement basse disposée au niveau du haut de structure de dossier. II est ainsi possible de pallier l'insuffisance de bras de levier pour faire fléchir la zone de fléchissement basse. In the proposed arrangement, the armature is provided with a high deflection zone complementary to the low deflection zone disposed at the top of the backrest structure. It is thus possible to overcome the insufficiency of lever arm to bend the low sag zone.

D'autres particularités et avantages de l'invention apparaîtront dans la description qui suit, faite en référence à la figure jointe qui est une représentation en coupe longitudinale partielle d'un siège selon une réalisation. Other features and advantages of the invention will appear in the description which follows, with reference to the attached figure which is a partial longitudinal sectional representation of a seat according to one embodiment.

En référence aux figures, on décrit un siège 1 de véhicule automobile comprenant un dossier 2 et un coussin 3 d'appui-tête, ledit coussin étant associé audit dossier au moyen d'une armature 4, notamment métallique, présentant une partie saillante 5 depuis le haut de la structure dudit dossier, ledit siège présentant une cote minimale 6, mesurée suivant la ligne de torse, de 600 mm entre son point H et le haut de ladite structure de dossier, ladite armature présentant une forme générale de U renversé dont la partie supérieure 7 est repliée vers l'avant de sorte à être inscrite dans un plan sensiblement parallèle au plan défini par la partie inférieure des branches du U, la zone d'armature entre lesdits plans formant zone de fléchissement haute 8 permettant une absorption d'énergie. Referring to the figures, there is described a motor vehicle seat 1 comprising a backrest 2 and a headrest cushion 3, said cushion being associated with said backrest by means of a frame 4, in particular a metal frame, having a protruding portion 5 from the top of the structure of said backrest, said seat having a minimum dimension 6, measured along the torso line, of 600 mm between its point H and the top of said backrest structure, said armature having a generally U-shaped overturned shape whose upper part 7 is folded forward so as to be inscribed in a plane substantially parallel to the plane defined by the lower part of the branches of the U, the reinforcing zone between said planes forming a high deflection zone 8 allowing absorption of energy.

La zone de fléchissement haute 8 est complémentaire à la zone de fléchissement basse 10. The high deflection zone 8 is complementary to the low deflection zone 10.

Un anneau de sécurité 11, pour protéger les passagers en cas de retournement 25 du véhicule, est représenté en arrière de l'armature 4. A safety ring 11, to protect the passengers in case of overturning 25 of the vehicle, is shown behind the armature 4.

Selon la réalisation représentée, les branches du U sont insérées dans des logements 9 prévus en partie supérieure du dossier, ici sous forme de douilles métalliques soudées en haut de la structure de dossier, lesdits logements 30 débouchant en haut de la structure de dossier. According to the embodiment shown, the branches of the U are inserted in housings 9 provided in the upper part of the folder, here in the form of metal sleeves welded to the top of the backrest structure, said housing 30 opening at the top of the backrest structure.

En variante non représentée, les extrémités libres des branches du U peuvent être soudées en haut de la structure de dossier. In variant not shown, the free ends of the legs of the U can be welded to the top of the backrest structure.

Selon une réalisation, l'armature 4 est tubulaire. In one embodiment, the frame 4 is tubular.

Selon une réalisation, l'armature 4 est sous forme d'une tige pleine, ce qui 5 permet de diminuer son inertie en vue d'un fléchissement plus aisé. According to one embodiment, the armature 4 is in the form of a solid rod, which makes it possible to reduce its inertia with a view to easier deflection.

Selon la réalisation représentée, la partie repliée de l'armature 4 est logée dans le coussin 3, de sorte à présenter une esthétique satisfaisante. According to the embodiment shown, the folded portion of the frame 4 is housed in the cushion 3, so as to have a satisfactory aesthetic.

Claims (6)

REVENDICATIONS 1. Siège (1) de véhicule automobile comprenant un dossier (2) et un coussin (3) d'appui-tête, ledit coussin étant associé audit dossier au moyen d'une armature (4) présentant une partie saillante (5) depuis le haut de la structure dudit dossier, ledit siège présentant une cote (6) minimale de 600 mm entre son point H et le haut de ladite structure de dossier, ladite armature présentant une forme générale de U renversé, ledit siège étant caractérisé en ce que la partie supérieure (7) du U est repliée vers l'avant de sorte à être inscrite dans un plan sensiblement parallèle au plan défini par la partie inférieure des branches du U, la zone d'armature entre lesdits plans formant zone de fléchissement haute (8) permettant une absorption d'énergie. Motor vehicle seat (1) comprising a backrest (2) and a headrest cushion (3), said cushion being associated with said backrest by means of an armature (4) having a protruding part (5) from the top of the structure of said backrest, said seat having a dimension (6) of at least 600 mm between its point H and the top of said backrest structure, said armature having a generally u-shaped overturned shape, said seat being characterized in that the upper part (7) of the U is folded forward so as to be inscribed in a plane substantially parallel to the plane defined by the lower part of the branches of the U, the reinforcing zone between said planes forming a high deflection zone ( 8) allowing energy absorption. 2. Siège selon la revendication 1, caractérisé en ce que les branches du U sont insérées dans des logements (9) prévus en partie supérieure du dossier, lesdits logements débouchant en haut de la structure de dossier. 2. Seat according to claim 1, characterized in that the legs of the U are inserted into housings (9) provided in the upper part of the folder, said housing opening at the top of the backrest structure. 3. Siège selon la revendication 1, caractérisé en ce que les extrémités libres des branches du U sont soudées en haut de la structure de dossier. 3. Seat according to claim 1, characterized in that the free ends of the legs of the U are welded to the top of the backrest structure. 4. Siège selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'armature (4) est tubulaire. 4. Seat according to any one of claims 1 to 3, characterized in that the armature (4) is tubular. 5. Siège selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'armature (4) est sous forme d'une tige pleine. 5. Seat according to any one of claims 1 to 3, characterized in that the armature (4) is in the form of a solid rod. 6. Siège selon la l'une quelconque des revendications 1 à 5, caractérisé en ce que la partie repliée de l'armature (4) est logée dans le coussin (3).30 6. Seat according to any one of claims 1 to 5, characterized in that the folded portion of the frame (4) is housed in the cushion (3) .30
FR0706907A 2007-10-02 2007-10-02 MOTOR VEHICLE SEAT COMPRISING HEADREST ARMATURE WITH HIGH FALLING ZONE Active FR2921599B1 (en)

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FR0706907A FR2921599B1 (en) 2007-10-02 2007-10-02 MOTOR VEHICLE SEAT COMPRISING HEADREST ARMATURE WITH HIGH FALLING ZONE

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FR0706907A FR2921599B1 (en) 2007-10-02 2007-10-02 MOTOR VEHICLE SEAT COMPRISING HEADREST ARMATURE WITH HIGH FALLING ZONE

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FR2921599B1 FR2921599B1 (en) 2013-09-06

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0948272A (en) * 1995-08-08 1997-02-18 Inoac Corp Head rest stay and head rest
FR2866289A1 (en) * 2004-02-13 2005-08-19 Tachi S Co Headrest for use on vehicle seat, has spring to force headrest in elastic manner in forward direction, where headrest pivots in backward direction and its forward rotational movement is limited by bumper arm and stop tab
US20060119159A1 (en) * 2004-12-06 2006-06-08 Honda Motor Co., Ltd Locking headrest assembly
DE102004058936A1 (en) * 2004-12-07 2006-06-14 Tachi-S Co., Ltd. Foaming die for forming inverted L-shaped headrest, has movable die element which is moved away from back vertical cover surface region subsequent to injection of liquid foaming agent, so as to define recessed space in die component
US20060236520A1 (en) * 2005-04-26 2006-10-26 Arai Industrial Co., Ltd. Method for manufacturing headrest stay
EP1810877A1 (en) * 2006-01-23 2007-07-25 Viza Automocion, S.A.U. Retractable headrest for vehicle seats
FR2898558A1 (en) * 2006-03-14 2007-09-21 Cera Headrest for motor vehicle, has median part comprising displacement zones arranged so as to permit elastic displacement between upper end parts by manual action, where median part is integrated to cushion
WO2008046198A1 (en) * 2006-10-13 2008-04-24 Intier Automotive Inc. Head restraint sleeve
FR2910401A1 (en) * 2006-12-22 2008-06-27 Faurecia Sieges Automobile Adjustable headrest for backrest of motor vehicle seat, has hook triggered by depressing rod in backrest till depressing position is reached, where hook rotates body relative to rod to bring body from usage position to non-usage position
FR2921598A1 (en) * 2007-09-28 2009-04-03 Cera Headrest for rear seat of motor vehicle, has rectangular blank associated to rigid front shell by fixation units i.e. fasteners, and made of coating material, and elastic block arranged between blank and front surface

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0948272A (en) * 1995-08-08 1997-02-18 Inoac Corp Head rest stay and head rest
FR2866289A1 (en) * 2004-02-13 2005-08-19 Tachi S Co Headrest for use on vehicle seat, has spring to force headrest in elastic manner in forward direction, where headrest pivots in backward direction and its forward rotational movement is limited by bumper arm and stop tab
US20060119159A1 (en) * 2004-12-06 2006-06-08 Honda Motor Co., Ltd Locking headrest assembly
DE102004058936A1 (en) * 2004-12-07 2006-06-14 Tachi-S Co., Ltd. Foaming die for forming inverted L-shaped headrest, has movable die element which is moved away from back vertical cover surface region subsequent to injection of liquid foaming agent, so as to define recessed space in die component
US20060236520A1 (en) * 2005-04-26 2006-10-26 Arai Industrial Co., Ltd. Method for manufacturing headrest stay
EP1810877A1 (en) * 2006-01-23 2007-07-25 Viza Automocion, S.A.U. Retractable headrest for vehicle seats
FR2898558A1 (en) * 2006-03-14 2007-09-21 Cera Headrest for motor vehicle, has median part comprising displacement zones arranged so as to permit elastic displacement between upper end parts by manual action, where median part is integrated to cushion
WO2008046198A1 (en) * 2006-10-13 2008-04-24 Intier Automotive Inc. Head restraint sleeve
FR2910401A1 (en) * 2006-12-22 2008-06-27 Faurecia Sieges Automobile Adjustable headrest for backrest of motor vehicle seat, has hook triggered by depressing rod in backrest till depressing position is reached, where hook rotates body relative to rod to bring body from usage position to non-usage position
FR2921598A1 (en) * 2007-09-28 2009-04-03 Cera Headrest for rear seat of motor vehicle, has rectangular blank associated to rigid front shell by fixation units i.e. fasteners, and made of coating material, and elastic block arranged between blank and front surface

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Publication number Publication date
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