EP1791721A1 - Siege de vehicule - Google Patents

Siege de vehicule

Info

Publication number
EP1791721A1
EP1791721A1 EP05790312A EP05790312A EP1791721A1 EP 1791721 A1 EP1791721 A1 EP 1791721A1 EP 05790312 A EP05790312 A EP 05790312A EP 05790312 A EP05790312 A EP 05790312A EP 1791721 A1 EP1791721 A1 EP 1791721A1
Authority
EP
European Patent Office
Prior art keywords
motor vehicle
vehicle seat
backrest
headrest
seat according
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Withdrawn
Application number
EP05790312A
Other languages
German (de)
English (en)
Inventor
Alwin Macht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brose Fahrzeugteile SE and Co KG
Original Assignee
Brose Fahrzeugteile SE and Co KG
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 Brose Fahrzeugteile SE and Co KG filed Critical Brose Fahrzeugteile SE and Co KG
Publication of EP1791721A1 publication Critical patent/EP1791721A1/fr
Withdrawn legal-status Critical Current

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
    • B60N2/42—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
    • B60N2/4207—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 characterised by the direction of the g-forces
    • B60N2/4214—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 characterised by the direction of the g-forces longitudinal
    • B60N2/4228—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 characterised by the direction of the g-forces longitudinal due to impact coming from the rear
    • 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
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/2222—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable the back-rest having two or more parts
    • 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

Definitions

  • the invention relates to a motor vehicle seat according to the preamble of claim 1.
  • Such a motor vehicle seat comprises a backrest which has on its front side a support surface for supporting the back of a seated on the motor vehicle seat in normal position vehicle occupant, and a headrest which defines on its front side a support surface for supporting the head of the seated in normal position on the vehicle seat occupants
  • the backrest is formed by a backrest base part and a tiltable backrest upper part, which are held by a locking mechanism in a defined position to each other in which they form a predetermined support surface for the back of a vehicle occupant.
  • this locking mechanism is solved or overcome by the crash forces, so that the backrest upper part can be tilted with respect to the base part to the rear, in a direction away from the back of the vehicle occupant.
  • a locking mechanism means any means that (in normal operation of a motor vehicle) a tilting of the backrest shell counteract such as a locking mechanism that locks any tilting movement, or elastic means that oppose a tilting movement with its elastic force and can be overcome in a crash, for example, in which the locking mechanism is released or by the elastic force of the crash Forces is exceeded.
  • tilting the backrest upper part which serves to support the upper thoracic region or shoulder region of a vehicle occupant to the rear, to be prevented in particular by a rear crash that by a temporally different impact of the head on the associated support surface of the headrest on the one hand and the upper body on the other hand, a relative movement or relative acceleration between the vertebrae and thoracic vertebrae occurs on the associated support surface of the backrest upper part, which can lead to the so-called whiplash injury.
  • the tilting of the backrest upper part in a crash case should therefore avoid the occurrence of a whiplash injury in the rear crash by minimizing the Reiativiolo and relative acceleration between the vertebrae and thoracic vertebrae.
  • the invention is based on the problem of further improving a motor vehicle seat of the type mentioned above with regard to the behavior in the event of a crash, in particular a rear crash.
  • the headrest of the motor vehicle seat is arranged on the backrest and / or in a crash case relative to the backrest upper part displaced so that the support surface of the headrest is not moved together with this backward when tilting the backrest upper part.
  • the solution according to the invention is based on the finding that a (experimentally confirmed) further reduction of the occurring in a rear crash
  • Acceleration differences in the head vertebrae on the one hand and thoracic spine on the other hand can be achieved if in a crash, the tilting of the The back of the upper part of the thorax, which supports the thoracic vertebra area, causes the head to come into contact with the headrest as early as possible with the associated support surface.
  • the headrest is either connected to the backrest base part, so in a crash case is not tilted together with the backrest upper part, or that (arranged on the upper backrest) headrest in a crash case when tilting the backrest upper part to the rear (Simultaneously) performs a movement forward (and possibly top) in the direction of the head of a (in the normal position) located on the corresponding vehicle seat vehicle occupant.
  • the tilting of the backrest upper part is at least partially compensated by the forward displacement of the headrest, so that the support surface for the head of the vehicle occupant as possible not moved backwards (away from the head of the vehicle occupant).
  • the tilting movement of the backrest upper part about the backrest base part is advantageously a pivoting movement, in particular about a pivot axis arranged below the backrest upper part.
  • the pivoting movement is preferably against the action of a damping element, for. B. in the form of an elastic element which may be formed in a simple manner as a compression spring and which preferably acts between the backrest upper part and the backrest base part.
  • a damping element for. B. in the form of an elastic element which may be formed in a simple manner as a compression spring and which preferably acts between the backrest upper part and the backrest base part.
  • the locking mechanism which in normal operation counteracts the tilting of the backrest upper part with respect to the backrest base part to the rear, is preferably designed such that it permits a substantial tilting of the backrest upper part only after a predefinable minimum force is exceeded, which in the tilting direction on the backrest upper part (by the impact of the seat occupant with his upper body against the back upper part) acts.
  • This minimum force is chosen so that it corresponds to the minimum accelerations typically occurring in a crash case, z. At least 3 * g or 4 * g, where g denotes the gravitational acceleration.
  • the locking mechanism can also be deactivated by means of a crash or a pre-crash sensor.
  • the locking mechanism is formed by an elastic element, which is a substantial tilting of the
  • Lehnenobervons counteracts backwards and only when reaching or exceeding a predetermined minimum, determined by the spring constant minimum force in the direction of tilting in the event of a crash desired tilting of the backrest upper part against the elastic force allows, ie, the forces caused by the crash forces then overcome the restoring force of the elastic element.
  • a predetermined minimum determined by the spring constant minimum force in the direction of tilting in the event of a crash desired tilting of the backrest upper part against the elastic force allows, ie, the forces caused by the crash forces then overcome the restoring force of the elastic element.
  • a certain elasticity which allows smaller compensating movements of the backrest upper part with respect to the backrest base part.
  • a substantial tilting of the backrest upper part occurs only at forces that are to be expected in a crash, in particular a rear crash, but not in normal operation of a motor vehicle.
  • the locking mechanism is designed such that the backrest upper part and the backrest base part are coupled rigidly in normal operation substantially rigidly and only by releasing the locking mechanism in the event of a crash at all the tilting movement of the backrest upper part is made possible for backrest base part.
  • the locking mechanism a locking element, for. Example in the form of a locking bolt with a predetermined breaking point, which is destroyed in a crash case and thereby allows tilting of the backrest upper part with respect to the backrest base part.
  • the movement of the headrest forward and / or upward in tilting the backrest to the rear can be carried out with known mechanisms for moving the headrest in a crash case.
  • the displacement of the headrest is triggered to the front and / or above by tilting the backrest upper part to the rear automatically by a suitable coupling between the headrest and backrest upper part consists.
  • a coupling of the headrest both with the backrest upper part and with the backrest base part so that the displacement of the headrest in a crash case is a direct consequence of tilting of the backrest upper part with respect to the backrest base part.
  • a traction mechanism or a lever mechanism are suitable as a coupling mechanism.
  • Figure 1 is a schematic side view of a motor vehicle seat with a backrest formed by a backrest base part and by a backrest upper part and with a headrest, wherein the backrest upper part with respect
  • Backrest base part is attached
  • Figure 2 is a modification of the arrangement of Figure 1, in which the headrest is displaceably mounted on the backrest upper part;
  • Figure 3 shows a development of the arrangement of Figure 2 with representation of parts of a mechanism for displacement of the headrest;
  • Figure 4 shows a second embodiment of the arrangement of Figure 2 with representation of a
  • Figure 1 shows a motor vehicle seat with a seat cushion P supporting seat base U, which defines a seat F for a motor vehicle occupant as seat occupant, and with a backrest 1, 2, which forms on its front side a Abstützflache 10, 20 for the back of the motor vehicle occupant as seat occupant ,
  • the backrest 1, 2 is formed in two parts and comprises a (with the seat base U connected) backrest base part 1 and about an axis 15 pivotally mounted around the backrest base part 1 Lehnenoberteil 2.
  • the Lehenoberteil 2 is arranged above the backrest base part 1 such that the front bearing surface 10 of the backrest base part 1 and the front abutment surface 20 of the backrest upper part 2 form a uniform support surface for the back of a vehicle occupant.
  • a headrest 3 is also arranged in a known manner via a connecting mechanism 13 in a known manner, which forms a front support surface 30 for the head of a vehicle occupant in the normal position on the vehicle seat as a seat user.
  • a seat occupant in normal position is understood to mean in each case a vehicle occupant who sits upright on the seat surface F of the seat cushion P, so that his spine extends along the backrest 10, 20.
  • the contact surface 20 of the backrest upper part 2 serves in particular for supporting the back in the upper thoracic or shoulder region and the headrest 3 serves - with the correct height adjustment - for supporting the back of the head of the seat user.
  • the seat longitudinal direction x is understood to be that direction along which the thighs of a vehicle occupant seated in the normal position on the seat surface F extend.
  • the acceleration of the upper thoracic vertebra in particular can be controlled by the flexibility of the backrest structure in the upper thoracic region with spatially defined support surface for the back of the head, so that in the critical, injury-prone time interval (for a few milliseconds) essentially at one level can be held, on which the probability of the occurrence of whiplash is significantly reduced. In particular, large differences in acceleration between the head and upper chest area of the vehicle occupant are prevented.
  • FIG. 2 shows a modification of the arrangement from FIG. 1, the difference being that the headrest 3 is not arranged on the backrest base part 1 but on the backrest upper part 2 via a connection mechanism 23.
  • the connecting mechanism 23 is configured such that it allows for simultaneous displacement V of the headrest 3 to the front and top when tilting the back upper part 2 in a pivoting direction H, according to the displaced position of the headrest 3 with respect to the dashed line shown in Figure 2 Lehnenobermaschines 2.
  • the pivotal movement of the backrest upper part 2 is compensated to the rear, so that the headrest - viewed in the seat longitudinal direction x - their position changes as little as possible.
  • FIG. 3 shows a possible triggering mechanism 7 with which the desired displacement V of the headrest 3 can be released in a direction H to the rear when the backrest upper part 2 is tilted.
  • a traction means 70 is provided, which is fixed with one end 71 on the backrest base part 1 and is deflected by means of a deflection element 72 arranged on the backrest upper part 2. With its second, not visible in Figure 3 end of the traction means is in connection with a mechanism for displacing the headrest. 3
  • the support surface 30 of the headrest 3 moves together with the backrest upper part 2 to the rear, away from the back of the head of the vehicle occupant. Rather, the support surface 30 remains - viewed in the seat longitudinal direction x - essentially in its original position, as is clear from the dashed representation of the backrest upper part 2 and the headrest 3 after tilting the backrest upper part 2 and thereby triggered forward displacement of the headrest 3.
  • a difference between the embodiment shown in Figure 3 and the motor vehicle seats shown in Figures 1 and 2 consists in the locking mechanism which counteracts a tilting of the backrest upper part 2 to the rear in normal operation.
  • This is formed here by a torsion spring 4 ', which acts in the region of the pivot axis 15 of the backrest upper part 2 on the backrest base part 1 and on the other hand rigidly connected to the back upper part 2 connecting lever 12 between backrest base part 1 and upper backrest part 2 and thereby the backrest upper part against a stop 40th braces that the backrest base part 1 and the backrest upper part 2 with their contact surfaces 10, 20 form a defined support surface for the back of a vehicle occupant.
  • the spring constant and biasing force of the torsion spring 4 ' is chosen so that it gives little in the forces occurring during normal operation of a motor vehicle and Therefore, no substantial tilting movement of the backrest upper part 2 allows to the rear.
  • the vehicle occupant bounces with its upper back region with sufficiently large force against the contact surface 20 of the upper backrest part 2, the biasing force of the torsion spring 4 'overcome and the backrest upper part 2 pivoted in a direction H to the rear, away from the back of the seat occupant.
  • the headrest 3 (eg by pivoting) moved forward so that it does not actively away from the head of the seat occupant. Rather, the spatial position of the headrest 3, based, for example, on the backrest base part 1, viewed in the seat longitudinal direction x, remains essentially unchanged.
  • FIG. 4 shows a concrete embodiment of an adjusting mechanism with which a headrest 3 arranged on the backrest upper part 2 can be simultaneously displaced rearwardly in a direction H when the backrest upper part 2 is tilted.
  • This adjusting mechanism 8 is formed by a lever arrangement 8a, 8b, 8c, of which two lever elements 8a, 8b form a connecting lever or toggle lever with a knee joint 85, via which the headrest 3 is connected to the backrest base part 1.
  • a lever element 8a that articulated lever pair 8a, 8b hinged with its free end 81 on the backrest base part 1 pivotally and the second lever member 8b of the toggle lever pair 8a, 8b with its free end 83 with the headrest 3 articulated.
  • the second lever element 8b engages with its free end 83 on at least one connecting part 23, in particular in the form of a connecting rod, between the headrest 3 and the backrest upper part 2.
  • a control lever 8c is hinged, with its free end 82 with a control surface 28 of the backrest upper part 2, z. B. on the back of the contact surface 20, is in operative connection.
  • the control surface 28 acts on the control lever 8c of the lever assembly 8a, 8b, 8c, in turn, via its connection with the knee joint 85, a change of the two lever elements 8a, 8b as Connection lever serving joint lever pair causes the knee joint 85 included angle. Due to the associated pivotal movement of the lever elements 8a, 8b of the articulated lever pair (corresponding to a change, in particular magnification, of the knee joint 85 between the Lever elements 8a, 8b included angle) there is a shift V of the headrest 3 forward, according to a substantially pivotal movement of the headrest body.
  • the headrest 3 carries out the movement of the associated lever element 8b thereof serving as a connecting lever hinge lever pair 8a, 8b, which corresponds to a pivotal movement about the knee joint 85 at a simultaneous spatial displacement of the knee joint, as in Figure 4 based on the dashed representation of the individual components 2, 3, 8 after tilting the backrest upper part 2 and the forward displacement of the headrest 3 recognizable.
  • the headrest 3 thereby retains its position substantially in the seat longitudinal direction x, despite the tilting of the backrest upper part 2 towards the rear.
  • This is a positively controlled by a connecting lever or toggle lever in the form of a pair of lever levers 8a, 8b displacement of the headrest 3 in response to the tilting of the backrest upper part 2 to the rear, triggered by both the connection lever 8a, 8b and with the back shell 2 related control levers 8c.

Landscapes

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

Abstract

L'invention concerne un siège de véhicule comportant un dossier présentant, sur son côté avant, une surface support destinée à supporter le dos d'un occupant assis sur le siège, et un appuie-tête présentant, sur son côté avant, une surface support destinée à supporter la tête d'un occupant assis sur le siège. Ledit dossier comporte une partie inférieure de dossier et une partie supérieure de dossier pouvant être inclinée par rapport à la partie inférieure, présentant, sur leur côté avant respectif, une surface d'appui. Les deux parties de dossier sont disposées de telle manière l'une par rapport à l'autre par l'intermédiaire d'un mécanisme de verrouillage que leurs surface d'appui forment une surface support définie destinée à supporter le dos d'un occupant assis sur le siège et qu'en cas d'accident, la partie supérieure de dossier puisse être inclinée vers l'arrière, contre l'action du mécanisme de verrouillage, de manière à être éloignée du dos d'un occupant assis sur le siège. Selon l'invention, l'appuie-tête (3) est disposé et/ou peut être déplacé de telle manière lors de l'inclinaison de la partie supérieure de dossier (2) que la surface support (30) de l'appuie-tête ne soit pas inclinée vers l'arrière de façon commune avec la surface d'appui (20) de la partie supérieure de dossier (2).
EP05790312A 2004-09-10 2005-09-01 Siege de vehicule Withdrawn EP1791721A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202004014363U DE202004014363U1 (de) 2004-09-10 2004-09-10 Kraftfahrzeugsitz
PCT/DE2005/001557 WO2006026967A1 (fr) 2004-09-10 2005-09-01 Siege de vehicule

Publications (1)

Publication Number Publication Date
EP1791721A1 true EP1791721A1 (fr) 2007-06-06

Family

ID=35427387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05790312A Withdrawn EP1791721A1 (fr) 2004-09-10 2005-09-01 Siege de vehicule

Country Status (3)

Country Link
EP (1) EP1791721A1 (fr)
DE (1) DE202004014363U1 (fr)
WO (1) WO2006026967A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007036466A1 (de) 2006-12-18 2008-06-19 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Crash-optimierter Kraftfahrzeugsitz
DE102009008736A1 (de) * 2009-02-12 2010-09-09 Lear Corp., Southfield Fahrzeugsitzanordnung mit bequemem Rückenlehnenabschnitt
DE102009043113A1 (de) 2009-09-25 2011-03-31 Daimler Ag Verfahren zum Schützen eines Fahrzeuginsassen in einem Fahrzeugsitz eines Fahrzeugs

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2316864B (en) * 1996-09-06 2000-10-04 Autoliv Dev Improvements in or relating to a safety seat
DE29718361U1 (de) * 1997-10-06 1998-03-05 Glathe, Jens, 10825 Berlin Sicherheitssystem für Passagiere in Fahrzeugen aller Art
DE29808831U1 (de) * 1998-05-15 1998-08-27 Delphi Automotive Systems Deutschland GmbH, 42369 Wuppertal Sitz- und Kopfstützenanordnung für ein Fahrzeug
DE19919697A1 (de) * 1999-04-30 2000-11-02 Keiper Gmbh & Co Fahrzeugsitz, insbesondere Kraftfahrzeug-Rücksitzbank
DE19921821A1 (de) * 1999-05-11 2000-11-23 Keiper Gmbh & Co Fahrzeugsitz, insbesondere Kraftfahrzeugsitz
US6523892B1 (en) * 1999-05-20 2003-02-25 Mazda Motor Corporation Seat structure for vehicle
DE19951820A1 (de) * 1999-10-27 2001-05-03 Hammerstein Gmbh C Rob Fahrzeugsitz für ein Kraftfahrzeug mit einer Rückenlehne
NL1016560C1 (nl) * 2000-02-01 2001-08-02 Whiplash Preventie Systems Hol Rugleuning met variabele stijfheid voor voertuigstoel.
JP4373576B2 (ja) * 2000-04-25 2009-11-25 しげる工業株式会社 車両用シートのむち打ち防止構造
DE60201884T2 (de) * 2001-01-23 2005-11-03 Autoliv Development Ab Fahrzeugsitz
US6565153B2 (en) * 2001-07-31 2003-05-20 Johnson Controls Technology Corporation Upper back support for a seat
JP2004025939A (ja) * 2002-06-21 2004-01-29 Johnson Controls Automotive Systems Corp 自動車用シート

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006026967A1 *

Also Published As

Publication number Publication date
WO2006026967A1 (fr) 2006-03-16
DE202004014363U1 (de) 2006-01-19

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