FR2914883A1 - Seat for motor vehicle, has rod having deformable absorption zone for absorbing energy against longitudinal force of impact, where absorption zone is placed in free part of rod and formed by deflection of rod - Google Patents
Seat for motor vehicle, has rod having deformable absorption zone for absorbing energy against longitudinal force of impact, where absorption zone is placed in free part of rod and formed by deflection of rod Download PDFInfo
- Publication number
- FR2914883A1 FR2914883A1 FR0702676A FR0702676A FR2914883A1 FR 2914883 A1 FR2914883 A1 FR 2914883A1 FR 0702676 A FR0702676 A FR 0702676A FR 0702676 A FR0702676 A FR 0702676A FR 2914883 A1 FR2914883 A1 FR 2914883A1
- Authority
- FR
- France
- Prior art keywords
- rod
- zone
- seat
- absorption zone
- backrest
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
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
- B60N2/80—Head-rests
- B60N2/806—Head-rests movable or adjustable
- B60N2/809—Head-rests movable or adjustable vertically slidable
- B60N2/812—Head-rests movable or adjustable vertically slidable characterised by their locking devices
- B60N2/818—Head-rests movable or adjustable vertically slidable characterised by their locking devices with stepwise positioning
-
- 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
Abstract
Description
L'invention concerne un siège de véhicule automobile, un appui-tête et unThe invention relates to a motor vehicle seat, a headrest and a
dossier d'un tel siège.folder of such a seat.
II est connu de réaliser un siège de véhicule automobile comprenant un dossier 5 et un coussin d'appui-tête relié en haut dudit dossier par au moins une tige, ladite tige présentant une partie coulissant dans une gaine et une partie libre. It is known to provide a motor vehicle seat comprising a backrest 5 and a headrest cushion connected at the top of said backrest by at least one rod, said rod having a sliding portion in a sheath and a free portion.
La partie coulissante peut servir de partie de réglage en hauteur de l'appui-tête, ladite partie pouvant être pourvue de crans de réglage. En variante, la partie coulissante peut être insérée dans la gaine sans possibilité de réglage en hauteur. The sliding portion may serve as height adjustment portion of the headrest, said portion may be provided with adjustment notches. Alternatively, the sliding portion can be inserted into the sheath without the possibility of height adjustment.
En cas de choc de la tête du passager sur l'appui-tête, il est nécessaire que la 15 tête ne subisse pas une décélération supérieure à 80 g pendant plus de 3 ms, sous peine de lésions irréversibles. In case of impact of the head of the passenger on the headrest, it is necessary that the head does not undergo a deceleration greater than 80 g for more than 3 ms, under pain of irreversible damage.
En outre, la tige ne doit pas se rompre de sorte à présenter une arête dangereuse, notamment: au niveau d'un cran de réglage pratiqué dans la tige 20 dans sa partie coulissante, qui forme amorce de rupture. In addition, the rod must not break so as to present a dangerous edge, including: at a setting notch formed in the rod 20 in its sliding portion, which forms the beginning of rupture.
Pour répondre à ces problématiques, il est connu de prévoir un rembourrage important permettant d'absorber une partie de l'énergie du choc, ce qui entraine des surcoûts de fabrication importants. L'invention a pour but de pallier cet inconvénient. To address these issues, it is known to provide substantial padding to absorb some of the energy of the shock, which leads to significant manufacturing costs. The invention aims to overcome this disadvantage.
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 relié en haut dudit 30 dossier par au moins une tige, ladite tige présentant une partie coulissant dans une gaine et une partie libre, ladite tige comprenant une zone déformable d'absorption d'énergie à l'encontre d'une force longitudinale de choc, ladite zone étant disposée dans ladite partie libre. 10 25 2 For this purpose, and according to a first aspect, the invention proposes a motor vehicle seat comprising a backrest and a headrest cushion connected at the top of said backrest by at least one rod, said rod having a sliding part in a sheath and a free portion, said rod comprising a deformable zone of energy absorption against a longitudinal force of shock, said zone being disposed in said free portion. 10 25 2
Dans cette description, les termes de positionnement dans l'espace (haut, bas, longitudinal, vertical, latéral,...) sont pris en référence au siège disposé dans le véhicule. La zone d'absorption est agencée de sorte à présenter une moindre résistance au fléchissement que la partie coulissante de la tige susceptible d'être non encastrée dans la gaine, notamment au niveau des crans de réglage éventuels lorsque l'appui-tête est réglé en position haute. 10 Selon d'autres aspects, l'invention propose un appui-tête et un dossier d'un tel siège. In this description, the terms of positioning in space (top, bottom, longitudinal, vertical, lateral, ...) are taken in reference to the seat disposed in the vehicle. The absorption zone is arranged so as to have a lower resistance to bending than the sliding portion of the rod that may be not recessed in the sheath, particularly at the level of any adjustment notches when the headrest is adjusted in high position. In other aspects, the invention provides a headrest and a backrest of such a seat.
D'autres particularités et avantages de l'invention apparaîtront dans la 15 description qui suit, faite en référence aux figures jointes dans lesquelles : • la figure 1 est une vue schématique latérale partielle d'un siège selon une réalisation, ledit siège comprenant une tige coulissant dans le dossier, l'appui-tête étant en position haute, • la figure 2 est une vue schématique en perspective d'un jeu de tiges, 20 reliées par un pont de matière de sorte à former armature d'appui-tête en tube coudé, selon deux réalisations (a et b) et avec différents agencements de zones d'absorption. Other features and advantages of the invention will appear in the description which follows, with reference to the appended figures in which: FIG. 1 is a partial schematic side view of a seat according to one embodiment, said seat comprising a rod sliding in the backrest, the headrest being in the up position, • Figure 2 is a schematic perspective view of a set of rods, 20 connected by a material bridge so as to form a headrest frame in bent tube, according to two embodiments (a and b) and with different arrangements of absorption zones.
En référence aux figures, on décrit un siège 1 de véhicule automobile 25 comprenant un dossier 2 et un coussin 3 d'appui-tête relié en haut dudit dossier par au moins une tige 4, ladite tige présentant une partie 5 coulissant dans une gaine 12 et une partie libre 6, ladite tige comprenant une zone 8 déformable d'absorption d'énergie à l'encontre d'une force longitudinale de choc, ladite zone étant disposée dans ladite partie libre. 30 En fonction des différentes configurations de montage et de réglage de l'appui-tête, la parties coulissante 5 est encastrée en tout ou partie dans la gaine 12.5 La zone 8 se déforme, selon la force d'impact, de façon élastique ou plastique. Referring to the figures, there is described a seat 1 of a motor vehicle 25 comprising a backrest 2 and a headrest cushion 3 connected at the top of said backrest by at least one rod 4, said rod having a portion 5 sliding in a sheath 12 and a free portion 6, said rod comprising a deformable zone 8 of energy absorption against a longitudinal impact force, said zone being disposed in said free portion. Depending on the different mounting and adjustment configurations of the headrest, the sliding part 5 is fully or partially embedded in the sheath 12.5. The zone 8 deforms, according to the impact force, elastically or plastically. .
La zone 8 peut notamment être agencée de sorte que, sous l'impact longitudinal d'une sphère de 6,8 kg et de diamètre 165 mm percutant l'appui tête 9, à une vitesse longitudinale de 24,1 km/h, au dessus de ladite zone et à une distance maximale de 400 mm par rapport au haut de dossier 2, la tige 4 ne subisse pas de rupture et la décélération de ladite sphère ne soit pas supérieure à 80 g pendant plus de 3 rns. The zone 8 can in particular be arranged so that, under the longitudinal impact of a sphere of 6.8 kg and diameter 165 mm striking the head support 9, at a longitudinal speed of 24.1 km / h, at above said zone and at a maximum distance of 400 mm from the upper backrest 2, the rod 4 does not break and the deceleration of said sphere is not greater than 80 g for more than 3 rns.
La résistance de la zone 8 d'absorption sera adaptée dans le cas d'une liaison par plusieurs, et notamment deux tiges 4. The resistance of the absorption zone 8 will be adapted in the case of a connection by several, and in particular two rods 4.
Selon une réalisation, la zone 8 est agencée de sorte à, dans le cas d'une liaison par deux tiges 4, réaliser une dissipation de l'ordre de 50 g dans un 15 essai tel que décrit ci-dessus. According to one embodiment, the zone 8 is arranged so that, in the case of a connection by two rods 4, achieve a dissipation of the order of 50 g in an assay as described above.
Selon une réalisation, la zone 8 d'absorption est formée par un écrasement 10 de la tige 4. According to one embodiment, the absorption zone 8 is formed by a crushing of the rod 4.
20 Selon une réalisation, l'écrasement 10 présente une symétrie par rapport à un plan longitudinal vertical, de sorte à faciliter une flexion à l'encontre d'un choc longitudinal. In one embodiment, the squeeze 10 is symmetrical with respect to a vertical longitudinal plane, so as to facilitate bending against a longitudinal impact.
Selon une réalisation, l'écrasement 10 présente une section en forme de V. Selon une réalisation, l'écrasement 10 présente une section en forme de méplat. Dans le cas d'un appui-tête 9 réglable en hauteur par coulissement de la tige 4 30 dans le dossier 2, comme représenté en figure 1, ledit appui-tête comprend un coussin 3 et au moins une tige 4 saillant dudit coussin, ladite tige comprenant une zone 8 d'absorption. 25 5 Dans la réalisation représentée, une pluralité de crans 11 de réglage est disposée entre l'extrémité libre de la tige 4 et la zone 8 d'absorption, la résistance à la flexion de ladite tige au niveau desdits crans étant supérieure à celle de ladite zone. In one embodiment, the crush 10 has a V-shaped section. In one embodiment, the crush 10 has a flat-shaped section. In the case of a headrest 9 adjustable in height by sliding of the rod 4 30 in the backrest 2, as shown in FIG. 1, said headrest comprises a cushion 3 and at least one stem 4 protruding from said cushion, said rod comprising an absorption zone 8. In the embodiment shown, a plurality of adjustment notches 11 are arranged between the free end of the rod 4 and the absorption zone 8, the bending resistance of said rod at said notches being greater than that of said area.
Dans le cas d'un appui-tête 9 réglable en hauteur par coulissement de la tige 4 dans ledit appui-tête, correspondant à une variante non représentée, le dossier 3 comprend au moins une tige 4 saillant dudit dossier, ladite tige comprenant une zone 8 d'absorption. In the case of a headrest 9 adjustable in height by sliding of the rod 4 in said headrest, corresponding to a variant not shown, the backrest 3 comprises at least one rod 4 projecting from said backrest, said rod comprising a zone 8 absorption.
10 Dans ce cas, une pluralité de crans 11 de réglage peut être disposée entre l'extrémité libre de la tige 4 et la zone 8 d'absorption, la résistance à la flexion de ladite tige au niveau desdits crans étant supérieure à celle de ladite zone.In this case, a plurality of adjustment notches 11 can be arranged between the free end of the rod 4 and the absorption zone 8, the bending resistance of said rod at said notches being greater than that of said rod. zoned.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0702676A FR2914883A1 (en) | 2007-04-12 | 2007-04-12 | Seat for motor vehicle, has rod having deformable absorption zone for absorbing energy against longitudinal force of impact, where absorption zone is placed in free part of rod and formed by deflection of rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0702676A FR2914883A1 (en) | 2007-04-12 | 2007-04-12 | Seat for motor vehicle, has rod having deformable absorption zone for absorbing energy against longitudinal force of impact, where absorption zone is placed in free part of rod and formed by deflection of rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2914883A1 true FR2914883A1 (en) | 2008-10-17 |
Family
ID=38686863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0702676A Withdrawn FR2914883A1 (en) | 2007-04-12 | 2007-04-12 | Seat for motor vehicle, has rod having deformable absorption zone for absorbing energy against longitudinal force of impact, where absorption zone is placed in free part of rod and formed by deflection of rod |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2914883A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2687402A1 (en) | 2012-07-20 | 2014-01-22 | Centre D'etude Et De Recherche Pour L'automobile (Cera) | Headrest device for a motor vehicle seat |
| US10974624B2 (en) | 2018-02-09 | 2021-04-13 | Lear Corporation | Rear occupant impact absorption assembly |
| DE102021131837B4 (en) | 2021-03-17 | 2024-03-28 | GM Global Technology Operations LLC | Headrest holder and motor vehicle seat with headrest arrangement |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3528703A (en) * | 1967-07-11 | 1970-09-15 | Toyota Motor Co Ltd | Headrest for vehicle seats |
| DE19746413A1 (en) * | 1996-10-22 | 1998-04-23 | Tokai Chemical Ind | Polyurethane foam filled head rest for motor vehicle seating |
| US5895094A (en) * | 1996-04-08 | 1999-04-20 | Aisin Seiki Kabushiki Kaisha | Headrest apparatus for vehicle seat |
| US20030001413A1 (en) * | 2001-07-02 | 2003-01-02 | Donald Albrecht | Permanently deformable headrest for a vehicle seat and method of use |
| WO2006136485A1 (en) * | 2005-06-23 | 2006-12-28 | Volkswagen Aktiengesellschaft | Headrest for protecting against whiplash |
-
2007
- 2007-04-12 FR FR0702676A patent/FR2914883A1/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3528703A (en) * | 1967-07-11 | 1970-09-15 | Toyota Motor Co Ltd | Headrest for vehicle seats |
| US5895094A (en) * | 1996-04-08 | 1999-04-20 | Aisin Seiki Kabushiki Kaisha | Headrest apparatus for vehicle seat |
| DE19746413A1 (en) * | 1996-10-22 | 1998-04-23 | Tokai Chemical Ind | Polyurethane foam filled head rest for motor vehicle seating |
| US20030001413A1 (en) * | 2001-07-02 | 2003-01-02 | Donald Albrecht | Permanently deformable headrest for a vehicle seat and method of use |
| WO2006136485A1 (en) * | 2005-06-23 | 2006-12-28 | Volkswagen Aktiengesellschaft | Headrest for protecting against whiplash |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2687402A1 (en) | 2012-07-20 | 2014-01-22 | Centre D'etude Et De Recherche Pour L'automobile (Cera) | Headrest device for a motor vehicle seat |
| FR2993521A1 (en) * | 2012-07-20 | 2014-01-24 | Cera | HEADREST DEVICE FOR MOTOR VEHICLE SEAT |
| US10974624B2 (en) | 2018-02-09 | 2021-04-13 | Lear Corporation | Rear occupant impact absorption assembly |
| US11912180B2 (en) | 2018-02-09 | 2024-02-27 | Lear Corporation | Rear occupant impact absorption assembly |
| DE102021131837B4 (en) | 2021-03-17 | 2024-03-28 | GM Global Technology Operations LLC | Headrest holder and motor vehicle seat with headrest arrangement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20091231 |