EP1474309A1 - Head rest for the seat of a vehicle - Google Patents

Head rest for the seat of a vehicle

Info

Publication number
EP1474309A1
EP1474309A1 EP03706424A EP03706424A EP1474309A1 EP 1474309 A1 EP1474309 A1 EP 1474309A1 EP 03706424 A EP03706424 A EP 03706424A EP 03706424 A EP03706424 A EP 03706424A EP 1474309 A1 EP1474309 A1 EP 1474309A1
Authority
EP
European Patent Office
Prior art keywords
telescope
headrest
force
headrest according
axis
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Withdrawn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
EP03706424A
Other languages
German (de)
French (fr)
Inventor
Bernd Kraemer
Alfred Scholl
Jan Thunnissen
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.)
Johnson Controls GmbH
Original Assignee
Johnson Controls GmbH
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
Priority claimed from DE10215137A external-priority patent/DE10215137B4/en
Application filed by Johnson Controls GmbH filed Critical Johnson Controls GmbH
Publication of EP1474309A1 publication Critical patent/EP1474309A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60NSEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80Head-rests
    • B60N2/806Head-rests movable or adjustable
    • B60N2/865Head-rests movable or adjustable providing a fore-and-aft movement with respect to the occupant's head
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60NSEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80Head-rests
    • B60N2/888Head-rests with arrangements for protecting against abnormal g-forces, e.g. by displacement of the head-rest

Definitions

  • the invention relates to a headrest connected to the backrest of a vehicle seat with a cushion segment which is variable in position relative to the main body of the headrest and which, in the event of an accident, can be shifted from the use position to the head of the seat occupant into a safety position and locked by means of a locking device in the position of use in the event of an accident is.
  • a generic headrest for a motor vehicle seat is known from the published patent application DE 39 00495 A1.
  • the headrest consists of a padded base body, which is connected to the backrest of the seat via downward-reaching handrails.
  • a separate cushion element is arranged in a recess of the base body by means of a piston-cylinder arrangement or a swivel mechanism in such a way that it can be moved about a horizontal axis (Y axis) oriented transversely to the longitudinal axis of the vehicle.
  • the cushion element is rotated under the action of a spring or a pneumatic or hydraulic volume-adjustable bellows from the comfortable position of use towards the head of the seat occupant into a safety position (support position) and mechanically acting locking device from locking lug and locking member locked in this position. Shortening the distance between the headrest and head creates an anti-whiplash effect, which prevents the upper spine from being overstretched in an accident situation.
  • Such locking devices are structurally complex and can also not lock continuously. It can therefore not be excluded that the latching is not in a secure engagement in the support position.
  • the invention has for its object to provide a generic locking device that allows a simple design, safe function and easy reset of the headrest after the accident situation.
  • the fixing device comprises a telescope which is supported on the one hand on the base body and on the other hand is connected to the displaceable cushion segment, the restoring forces acting on the cushion element in one of the
  • Telescopic axis deviating direction can be introduced into the telescope. Under the effect of the forces exerted by the head of the seat occupant on the upholstery element and introduced asymmetrically into the telescope, this braces and prevents an undesired shifting back of the upholstery element.
  • a power transmission device acting on the telescope according to a first preferred embodiment of the invention advantageously has a bolt which connects a flange plate arranged at the end of the telescope in the direction of travel and the displaceable cushion segment eccentrically to the telescope axis. Even if the cushion element and the flange plate are aligned with one another for optical or structural reasons, the force transmission from the cushion element into the flange plate and thus into the telescope takes place off-center.
  • the telescope (11) is arranged inclined to the horizontal (X direction of the vehicle).
  • the inclination can be 10 ° to 45 °, preferably approximately 20 ° to 25 ° and, in conjunction with the largely horizontal restoring force caused by the head of the occupant in the support position, leads to a blocking of the telescope.
  • Telescope basically encompasses any arrangement of components which are connected to one another and can be moved relative to one another via sliding guides and which, under an eccentric and / or obliquely applied counterforce, ensure self-locking against return.
  • Such a telescope advantageously comprises a number of mutually displaceable, preferably annular tube sections which are pushed into one another in the use position and are pulled apart when the safety position is taken up.
  • Such a telescope tends to be braced even with surface roughness of the pipe surface that is customary in production, when it is loaded eccentrically or obliquely. This effect can be reinforced with little effort by a targeted structuring of the pipes, for example by introducing circular recesses (machining on the lathe).
  • the pipe sections do not necessarily have to have a cylindrical shape. If the upholstery segment is not to perform a linear displacement but an arcuate movement, the telescope and the associated tube sections that can move into one another can also be designed in accordance with a torus segment. In this case, the telescope axis would run in an arc. In terms of production, the use of a linearly variable telescope is preferred.
  • the force generating device required to extend the cushion element preferably comprises one or more compression springs biased in the use position, with which in particular a displacement force acting centrally to the telescope axis and not tensioning the telescope can be generated.
  • the arrangement of a single compression spring, which surrounds the telescope coaxially to the telescope axis, is particularly favorable.
  • any other form of energy storage device can be used, for example tension springs, compressed air storage systems or pyrotechnic devices.
  • a return force (FRH) acting centrally to the telescopic axis (X) can be applied to the end of the telescope (11) facing the cushion element (9).
  • FH return force acting centrally to the telescopic axis (X)
  • This can be generated, for example, by a probe which is guided through the center of the telescope from the rear of the headrest and which is temporarily connected to the relevant end of the telescope and then withdrawn until the cushion element is locked in the use position with renewed prestressing of the force generating device.
  • the headrest be attached by means of Handrails are preferably connected to the backrest in a continuously adjustable height. It is further proposed that the headrest is preferably connected to the backrest in a continuously adjustable manner about an axis of rotation.
  • Fig. 1 shows an inventive headrest in the use position
  • Fig. 3 shows another headrest according to the invention in the safety position
  • the headrest shown in Figures 1 and 2 consists of a base body 1, which includes a padding 2 and a metallic support element 3 connected thereto.
  • the plate-shaped, essentially vertically aligned support element 3 is connected to the backrest 5 via holding rods 4 and can be locked in a continuously adjustable joint 6 to improve comfort in various inclinations.
  • the height of the headrest can also be adapted to the size of the seat occupant by means of a likewise continuously adjustable and lockable linear guide 7.
  • the base body 1 On the front side, that is to say the side facing the seat occupant, the base body 1 has a cuboid recess 8 in which a cushion segment 9 is arranged so as to be longitudinally displaceable in the direction of the head 10 of the seat occupant.
  • a tubular telescope 11 is arranged on the front side of the carrier element 3 and comprises a number of tube sections 12 which are longitudinally displaceable one inside the other in the direction of the telescope axis X.
  • the telescope is aligned centrally to the center of the carrier element 3 and, at its forwardly projecting free end, is connected centrally to a flange plate 13 arranged parallel to the carrier element 3. This in turn is aligned with the displaceable cushion segment 9 and is rigidly connected to it by means of a bolt-like force transmission device 14 aligned eccentrically to the telescope axis X.
  • a compression spring 15 which surrounds the telescope 11 coaxially to the telescope axis X. This is supported on the one hand on the carrier element 3 and on the other hand on the flange plate 13 and can be determined by means of a locking device, not shown, under pretension (FIG. 1). In this position (position of use), the cushion segment 9 is at a relatively large distance from the head 10 of the seat occupant.
  • the cushion segment for taking the safety position is displaced in the direction of the head 10 by the relaxing compression spring 15.
  • the tube sections slide apart as a result of the spring force FF generated by the compression spring and acting forward to the center of the telescopic axis X until the cushion segment assumes an end position defined by a stop (not shown).
  • the head 10 of the seat occupant striking the cushion element in the course of the accident generates a rearward restoring force F, under the effect of which an undesired shifting back of the cushion segment 9 could occur.
  • the restoring force F is introduced from the cushion segment 9 by means of the eccentrically arranged force transmission device 14 via the flange plate 13 (restoring force FR 2 ) into the telescope 11.
  • the tube segments 12 of the telescope 11 tilt under this load in such a way that a further pushing into one another and thus a backward displacement of the cushion segment 3 is prevented when the head 10 strikes.
  • the cushion segment 9 can be returned to the use position by inserting a probe into the recess 8 from the rear of the headrest through a bore 16 running coaxially to the telescopic axis X and connecting it centrally to the flange plate 13, for example by screwing it in in a corresponding thread.
  • the probe return force F RH
  • the tube segments 12 of the telescope 11 are pushed into one another and locked under prestress of the compression spring 15, so that the headrest is again in its starting position.
  • the cushion segment 9 can be displaced obliquely upwards from the position of use relative to the base body 1 into the safety position shown, so that it is not only in the direction of travel (-X direction) but also in height (+ Z direction). This kinematics takes into account the experience that head restraints are often set lower by the occupant to optimize comfort than is necessary for safety reasons.
  • the telescope 11 is fastened on the one hand to the vertically aligned support element 3 via a first beveled trestle 17, on the other hand connected to the upholstery segment 9 by means of an oppositely beveled second trestle 18 and inclined upward in the direction of travel relative to the horizontal by an angle ⁇ of 25 °.
  • Boundary surfaces of the recess 8 and the part of the cushion segment 9 projecting into it have a contour oriented parallel to the telescopic axis X in order to enable the desired displacement.
  • the restoring force FRI exerted by the head 10 of the seat occupant when it hits the cushion segment is introduced obliquely into the telescope 11 relative to the inclined telescopic axis X.
  • a telescope consisting of deep-drawn tubular sections made of sheet steel, which are fitted into one another with a slight clearance fit (maximum diameter difference 50 ⁇ )
  • there is sufficient inhibition in the telescope 11 due to the introduction of force at an angle of 25 ° with respect to the telescope axis X.
  • the required inclination (as well as the eccentricity to be provided in the design described at the beginning) can be calculated according to the usual rules of mechanical engineering. Of course, it is also possible to combine an inclination with an eccentric application of force.

Abstract

The invention relates to head rest connected to the backrest (5) of a vehicle, whereby an upholstered segment (9) which is displaceably mounted in relation to the base body (1) of the head rest can be displaced in the case of an accident, by means of a power generating device, moving from a working position to a safety position in the direction of the head of the passenger and said device can be stopped by means of a locking device. The locking device comprises a telescopic element (11) which is supported on the base body (1) and is connected to the displaceable upholstered segment (9), whereby the restoring forces (FR) acting on the upholstered element can be guided into the telescopic element in a direction deviating from the axis (X) of said telescopic element.

Description

Kopfstütze für einen Fahrzeugsitz Headrest for a vehicle seat
Beschreibungdescription
Die Erfindung betrifft eine mit der Rückenlehne eines Fahrzeugsitzes verbundene Kopfstütze mit einem relativ zum Grundkörper der Kopfstütze lageveränderlichen Polstersegment, das im Falle eines Unfalls unter der Wirkung einer Krafterzeugungseinrichtung aus der Gebrauchsstellung zum Kopf des Sitzinsassen hin in eine Sicherheitsstellung verlagerbar und mittels einer Feststelleinrichtung in dieser arretierbar ist.The invention relates to a headrest connected to the backrest of a vehicle seat with a cushion segment which is variable in position relative to the main body of the headrest and which, in the event of an accident, can be shifted from the use position to the head of the seat occupant into a safety position and locked by means of a locking device in the position of use in the event of an accident is.
Stand der TechnikState of the art
Aus der Offenlegungsschrift DE 39 00495 A1 ist eine gattungsgemäße Kopfstütze für einen Kraftfahrzeugsitz bekannt. Die Kopfstütze besteht aus einem gepolsterten Grundkörper, der über nach unten ragende Haltestangen mit der Rückenlehne des Sitzes verbunden ist. In einer Ausnehmung des Grundkörpers ist ein gesondertes Polsterelement mittels einer Kolben-Zylinder- anordnung oder eines Schwenkmechanismusses derart angeordnet, das es um eine horizontale, quer zur Fahrzeuglängsachse ausgerichtete Achse (Y- Achse) bewegbar ist. Falls ein im Fahrzeug befindlicher Sensor eine Unfallsituation vorhersieht, wird das Polsterelement unter der Wirkung einer Feder oder eines pneumatisch oder hydraulisch volumenveränderlichen Balgens aus der komfortablen Gebrauchsstellung zum Kopf des Sitzinsassen hin in eine Sicherheitsstelllung (Stützlage) gedreht und mittels einer mechanisch wirkenden Feststelleinrichtung aus Rastnase und Sperrglied in dieser Position arretiert. Die Verkürzung des Wegs zwischen Kopfstütze und Kopf bewirkt einen Anti-Whiplash-Effekt, verhindert also die Überdehnung der oberen Wirbelsäule in einer Unfallsituation.A generic headrest for a motor vehicle seat is known from the published patent application DE 39 00495 A1. The headrest consists of a padded base body, which is connected to the backrest of the seat via downward-reaching handrails. A separate cushion element is arranged in a recess of the base body by means of a piston-cylinder arrangement or a swivel mechanism in such a way that it can be moved about a horizontal axis (Y axis) oriented transversely to the longitudinal axis of the vehicle. If a sensor in the vehicle foresees an accident situation, the cushion element is rotated under the action of a spring or a pneumatic or hydraulic volume-adjustable bellows from the comfortable position of use towards the head of the seat occupant into a safety position (support position) and mechanically acting locking device from locking lug and locking member locked in this position. Shortening the distance between the headrest and head creates an anti-whiplash effect, which prevents the upper spine from being overstretched in an accident situation.
Derartige Rasteinrichtungen sind konstruktiv aufwendig und können ferner nicht stufenlos verrasten. Es kann daher nicht ausgeschlossen werden, dass die Verrastung sich in Stützlage nicht in sicherem Eingriff befindet.Such locking devices are structurally complex and can also not lock continuously. It can therefore not be excluded that the latching is not in a secure engagement in the support position.
Aufgabetask
Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Feststelleinrichtung bereitzustellen, die einen einfachen konstruktiven Aufbau, eine sichere Funktion und ein einfache Rückstellung der Kopfstütze nach Beendigung der Unfallsituation ermöglicht.The invention has for its object to provide a generic locking device that allows a simple design, safe function and easy reset of the headrest after the accident situation.
Lösungsolution
Die Aufgabe wird bei einer Kopfstütze nach dem Oberbegriff des Anspruchs 1 erfindungsgemäß dadurch gelöst, dass die Feststelleinrichtung ein Teleskop umfaßt, das sich einerseits am Grundkörper abstützt und andererseits mit dem verlagerbaren Polstersegment verbunden ist, wobei die auf das Polsterelement wirkenden Rückstellkräfte in einer von derThe object is achieved in a headrest according to the preamble of claim 1 in that the fixing device comprises a telescope which is supported on the one hand on the base body and on the other hand is connected to the displaceable cushion segment, the restoring forces acting on the cushion element in one of the
Teleskopachse abweichenden Richtung in das Teleskop einleitbar sind. Unter der Wirkung der vom Kopf des Sitzinsassen auf das Polsterelement ausgeübten, unsymmetrisch in das Teleskop eingeleiteten Kräfte verspannt sich dieses und verhindert eine unerwünschte Rückverlagerung des Polsterelements. Eine nach einer ersten bevorzugten Ausführung der Erfindung auf das Teleskop wirkende Kraftübertragungseinrichtung weist mit Vorteil einen Bolzen auf, welcher eine in Fahrtrichtung endseitig am Teleskop angeordnete Flanschplatte und das verlagerbare Polstersegment exzentrisch zur Teleskopachse miteinander verbindet. Auch wenn das Polsterelement und die Flanschplatte aus optischen oder konstruktiven Gründen miteinander fluchten, erfolgt die Kraftübertragung aus dem Polsterelement in die Flanschplatte und damit in das Teleskop außermittig.Telescopic axis deviating direction can be introduced into the telescope. Under the effect of the forces exerted by the head of the seat occupant on the upholstery element and introduced asymmetrically into the telescope, this braces and prevents an undesired shifting back of the upholstery element. A power transmission device acting on the telescope according to a first preferred embodiment of the invention advantageously has a bolt which connects a flange plate arranged at the end of the telescope in the direction of travel and the displaceable cushion segment eccentrically to the telescope axis. Even if the cushion element and the flange plate are aligned with one another for optical or structural reasons, the force transmission from the cushion element into the flange plate and thus into the telescope takes place off-center.
Nach einer weiteren Ausführung der Erfindung ist das Teleskop (11) gegenüber der Horizontalen (X-Richtung des Fahrzeugs) geneigt angeordnet. Die Neigung kann dabei 10° bis 45°, bevorzugt etwa 20° bis 25° betragen und führt in Verbindung mit der weitgehend waagerecht wirkenden, vom Kopf des Insassen hervorgerufenen Rückstellkraft in Stützlage zu einem Blockieren des Teleskops.According to a further embodiment of the invention, the telescope (11) is arranged inclined to the horizontal (X direction of the vehicle). The inclination can be 10 ° to 45 °, preferably approximately 20 ° to 25 ° and, in conjunction with the largely horizontal restoring force caused by the head of the occupant in the support position, leads to a blocking of the telescope.
Der Begriff „Teleskop" umfaßt grundsätzlich jede Anordnung von über Schiebeführungen miteinander verbundenen und zueinander verschieblichen Bauteilen, die unter einer exzentrisch und/oder schräg aufgebrachten Gegenkraft eine Selbsthemmung gegen Rücklauf sicherstellen.The term “telescope” basically encompasses any arrangement of components which are connected to one another and can be moved relative to one another via sliding guides and which, under an eccentric and / or obliquely applied counterforce, ensure self-locking against return.
Ein derartiges Teleskop umfaßt vorteilhafterweise eine Anzahl ineinander verschieblicher, bevorzugt kreisringförmiger Rohrabschnitte, die in Gebrauchsstellung im Wesentlichen ineinander geschoben sind und bei Einnahme der Sicherheitsstellung auseinander gezogen werden. Ein derartiges Teleskop neigt bereits bei fertigungsüblichen Oberflächen- rauigkeiten der Rohroberflächen zum Verspannen, wenn es exzentrisch oder schräg belastet wird. Durch ein gezieltes Strukturieren der Rohre, beispielsweise durch das Einbringen ringförmig umlaufender Vertiefungen (Bearbeiten auf der Drehmaschine) läßt sich dieser Effekt mit geringem Aufwand verstärken. Die Rohrabschnitte müssen nicht zwangsläufig eine zylinderförmige Gestalt aufweisen. Falls das Polstersegment keine lineare Verschiebung, sondern eine bogenförmige Bewegung ausführen soll, können das Teleskop und die zugehörigen, ineinander beweglichen Rohrabschnitte auch entsprechend einem Torussegment ausgebildet werden. Die Teleskopachse würde in diesem Fall bogenförmig verlaufen. Im Hinblick auf die Fertigung ist der Einsatz eines linear längenveränderlichen Teleskops jedoch zu bevorzugen.Such a telescope advantageously comprises a number of mutually displaceable, preferably annular tube sections which are pushed into one another in the use position and are pulled apart when the safety position is taken up. Such a telescope tends to be braced even with surface roughness of the pipe surface that is customary in production, when it is loaded eccentrically or obliquely. This effect can be reinforced with little effort by a targeted structuring of the pipes, for example by introducing circular recesses (machining on the lathe). The pipe sections do not necessarily have to have a cylindrical shape. If the upholstery segment is not to perform a linear displacement but an arcuate movement, the telescope and the associated tube sections that can move into one another can also be designed in accordance with a torus segment. In this case, the telescope axis would run in an arc. In terms of production, the use of a linearly variable telescope is preferred.
Die zum Ausfahren des Polsterelements erforderliche Krafterzeugungseinrichtung umfaßt vorzugsweise eine oder mehrere in Gebrauchsstellung vorgespannte Druckfedern, mit denen insbesondere eine zentrisch zur Teleskopachse wirkende, das Teleskop nicht verspannende Verschiebekraft erzeugbar ist. Besonders günstig ist die Anordnung einer einzigen Druckfeder, welche das Teleskop koaxial zur Teleskopachse umgibt. Grundsätzlich sind jedoch auch beliebige andere Ausbildungen von Energiespeichern einsetzbar, beispielsweise Zugfedern, Druckluftspeichersysteme oder pyrotechnische Einrichtungen.The force generating device required to extend the cushion element preferably comprises one or more compression springs biased in the use position, with which in particular a displacement force acting centrally to the telescope axis and not tensioning the telescope can be generated. The arrangement of a single compression spring, which surrounds the telescope coaxially to the telescope axis, is particularly favorable. In principle, however, any other form of energy storage device can be used, for example tension springs, compressed air storage systems or pyrotechnic devices.
Zum Instandsetzen der Kopfstütze nach Beendigung der Unfallsituation ist nach einer besonderen Ausbildung der Erfindung eine zentrisch zur Teleskopachse (X) wirkende Rückholkraft (FRH) auf das dem Polsterelement (9) zugewandte Ende des Teleskops (11) aufbringbar. Diese kann beispielsweise durch eine von der Rückseite der Kopfstütze mittig durch das Teleskop geführte Sonde erzeugt werden, die temporär mit dem betreffenden Ende des Teleskops verbunden und anschließend zurückgezogen wird, bis das Polsterelement unter erneuter Vorspannung der Krafterzeugungseinrichtung in der Gebrauchsstellung verrastet.In order to repair the headrest after the accident situation has ended, according to a special embodiment of the invention, a return force (FRH) acting centrally to the telescopic axis (X) can be applied to the end of the telescope (11) facing the cushion element (9). This can be generated, for example, by a probe which is guided through the center of the telescope from the rear of the headrest and which is temporarily connected to the relevant end of the telescope and then withdrawn until the cushion element is locked in the use position with renewed prestressing of the force generating device.
Um die Einstellung der Kopfstütze in der Gebrauchsstellung möglichst komfortabel zu gestalten, wird ferner angeregt, dass die Kopfstütze mittels Haltestangen bevorzugt stufenlos höheneinstellbar mit der Rückenlehne verbunden ist. Weiterhin wird vorgeschlagen, dass die Kopfstütze um eine Rotationsachse bevorzugt stufenlos drehverstellbar mit der Rückenlehne verbunden ist.In order to make the adjustment of the headrest in the use position as comfortable as possible, it is also suggested that the headrest be attached by means of Handrails are preferably connected to the backrest in a continuously adjustable height. It is further proposed that the headrest is preferably connected to the backrest in a continuously adjustable manner about an axis of rotation.
Figurencharacters
Die Figuren stellen beispielhaft und schematisch verschiedene Ausführungen der Erfindung dar.The figures represent examples and schematically of various embodiments of the invention.
Es zeigen:Show it:
Fig. 1 eine erfindungsgemäß ausgeführte Kopfstütze in GebrauchsstellungFig. 1 shows an inventive headrest in the use position
Fig. 2 die Kopfstütze nach Fig. 1 in der SicherheitsstellungFig. 2, the headrest according to Fig. 1 in the safety position
Fig. 3 eine weitere erfindungsgemäße Kopfstütze in der SicherheitsstellungFig. 3 shows another headrest according to the invention in the safety position
Die in den Figuren 1 und 2 abgebildete Kopfstütze besteht aus einem Grundkörper 1 , der eine Polsterung 2 sowie ein mit diesem verbundenes metallisches Trägerelement 3 umfaßt. Das plattenförmige, im Wesentlichen vertikal ausgerichtete Trägerelement 3 ist über Haltestangen 4 mit der Rückenlehne 5 verbunden und kann in einem stufenlos verstellbaren Gelenk 6 zur Verbesserung des Komforts in verschiedenen Neigungen arretiert werden. Die Höhe der Kopfstütze kann ferner durch eine ebenfalls stufenlos verstellbare und arretierbare Linearführung 7 an die Größe des Sitzinsassen angepaßt werden. Auf der vorderen, also dem Sitzinsassen zugewandten Seite weist der Grundkörper 1 eine quaderförmige Ausnehmung 8 auf, in der ein Polstersegment 9 in Richtung des Kopfes 10 des Sitzinsassen längsverschieblich angeordnet ist.The headrest shown in Figures 1 and 2 consists of a base body 1, which includes a padding 2 and a metallic support element 3 connected thereto. The plate-shaped, essentially vertically aligned support element 3 is connected to the backrest 5 via holding rods 4 and can be locked in a continuously adjustable joint 6 to improve comfort in various inclinations. The height of the headrest can also be adapted to the size of the seat occupant by means of a likewise continuously adjustable and lockable linear guide 7. On the front side, that is to say the side facing the seat occupant, the base body 1 has a cuboid recess 8 in which a cushion segment 9 is arranged so as to be longitudinally displaceable in the direction of the head 10 of the seat occupant.
Auf der Vorderseite des Trägerelements 3 ist ein rohrförmiges Teleskop 11 angeordnet, das eine Anzahl ineinander horizontal in Richtung der Teleskopachse X längsverschieblicher Rohrabschnitte 12 umfaßt. Das Teleskop ist mittig zum Zentrum des Trägerelements 3 ausgerichtet und an seinem nach vorne ragenden freien Ende zentrisch mit einer parallel zum Trägerelement 3 angeordneten Flanschplatte 13 verbunden. Diese fluchtet ihrerseits mit dem verschieblichen Polstersegment 9 und ist an dieses mittels einer exzentrisch zur Teleskopachse X ausgerichteten, bolzenartigen Kraftübertragungseinrichtung 14 starr angebunden.A tubular telescope 11 is arranged on the front side of the carrier element 3 and comprises a number of tube sections 12 which are longitudinally displaceable one inside the other in the direction of the telescope axis X. The telescope is aligned centrally to the center of the carrier element 3 and, at its forwardly projecting free end, is connected centrally to a flange plate 13 arranged parallel to the carrier element 3. This in turn is aligned with the displaceable cushion segment 9 and is rigidly connected to it by means of a bolt-like force transmission device 14 aligned eccentrically to the telescope axis X.
Zwischen Trägerelement 3 und Flanschplatten 13 ist ferner eine das Teleskop 11 koaxial zur Teleskopachse X umgebende Druckfeder 15 angeordnet. Diese stützt sich einerseits am Trägerelement 3 und anderseits an der Flanschplatte 13 ab und kann mittels einer nicht dargestellten Arretiervorrichtung unter Vorspannung festgestellt werden (Figur 1). Das Polstersegment 9 weist in dieser Position (Gebrauchsstellung) einen relativ großen Abstand zum Kopf 10 des Sitzinsassen auf.Between the support element 3 and flange plates 13 there is also a compression spring 15 which surrounds the telescope 11 coaxially to the telescope axis X. This is supported on the one hand on the carrier element 3 and on the other hand on the flange plate 13 and can be determined by means of a locking device, not shown, under pretension (FIG. 1). In this position (position of use), the cushion segment 9 is at a relatively large distance from the head 10 of the seat occupant.
In einer Unfallsituation treten im Fahrzeug unüblich hohe Beschleunigungskräfte auf, die von einem Sensor erfaßt werden. Eine mit dem Sensor in Wirkzusammenhang stehende Steuerung löst bei Überschreiten eines Beschleunigungsgrenzwerts unverzüglich die Arretiervorrichtung und bringt die Kopfstütze in die Sicherheitsstellung. Derartige Sensoren, Steuerungen und Arretiervorrichtungen sind beispielsweise aus der Druckschrift DE 200 02 171 U1 bekannt, auf die hiermit ausdrücklich verwiesen wird.In an accident situation, unusually high acceleration forces occur in the vehicle, which are detected by a sensor. A control system that is connected to the sensor immediately releases the locking device when an acceleration limit value is exceeded and brings the headrest into the safety position. Such sensors, controls and locking devices are known for example from the publication DE 200 02 171 U1, to which reference is hereby expressly made.
Nach dem Lösen der Arretiervorrichtung wird das Polstersegment zur Einnahme der Sicherheitsstellung, wie aus Figur 2 ersichtlich, von der sich entspannenden Druckfeder 15 in Richtung des Kopfes 10 hin verschoben. Dabei gleiten die Rohrabschnitte infolge der von der Druckfeder erzeugten, zentrisch zur Teleskopachse X nach vorne wirkenden Federkraft FF auseinander, bis das Polstersegment eine durch einen nicht dargestellten Anschlag definierte Endlage einnimmt. Der im Verlaufe der Unfallsituation auf das Polsterelement auftreffende Kopf 10 des Sitzinsassen erzeugt dabei eine nach hinten gerichtete Rückstellkraft F , unter deren Wirkung eine unerwünschte Rückverlagerung des Polstersegments 9 auftreten könnte. Die Rückstellkraft F wird aus dem Polstersegment 9 jedoch mittels der exzentrisch angeordneten Kraftübertragungseinrichtung 14 über die Flanschplatte 13 achsversetzt (Rückstellkraft FR2) in das Teleskop 11 eingeleitet. Die Rohrsegmente 12 des Teleskops 11 verkanten sich unter dieser Belastung derart, dass ein weiteres Ineinanderschieben und damit eine Rückverlagerung des Polstersegments 3 beim Auftreffen des Kopfes 10 verhindert wird.After releasing the locking device, the cushion segment for taking the safety position, as can be seen in FIG. 2, is displaced in the direction of the head 10 by the relaxing compression spring 15. The tube sections slide apart as a result of the spring force FF generated by the compression spring and acting forward to the center of the telescopic axis X until the cushion segment assumes an end position defined by a stop (not shown). The head 10 of the seat occupant striking the cushion element in the course of the accident generates a rearward restoring force F, under the effect of which an undesired shifting back of the cushion segment 9 could occur. However, the restoring force F is introduced from the cushion segment 9 by means of the eccentrically arranged force transmission device 14 via the flange plate 13 (restoring force FR 2 ) into the telescope 11. The tube segments 12 of the telescope 11 tilt under this load in such a way that a further pushing into one another and thus a backward displacement of the cushion segment 3 is prevented when the head 10 strikes.
Das Polstersegment 9 kann nach Beendigung der Unfallsituation dadurch in die Gebrauchsstellung zurückgeführt werden, dass von der Rückseite der Kopfstütze aus durch eine koaxial zur Teleskopachse X verlaufende Bohrung 16 eine Sonde in die Ausnehmung 8 eingeführt und zentrisch mit der Flanschplatte 13 verbunden wird, beispielsweise durch Einschrauben in ein entsprechendes Gewinde. Durch Zurückziehen der Sonde (Rückholkraft FRH) werden die Rohrsegmente 12 des Teleskops 11 unter Vorspannung der Druckfeder 15 ineinander geschoben und arretiert, so dass sich die Kopfstütze wieder in ihrer Ausgangsstellung befindet. Bei der Ausführung nach Fig. 3 ist das Polstersegment 9 gegenüber dem Grundkörper 1 aus der Gebrauchsstellung schräg nach oben in die dargestellte Sicherheitsstellung verschiebbar, so dass es sich nicht nur in Fahrtrichtung (-X-Richtung), sondern zusätzlich noch in der Höhe (+Z- Richtung) verlagert. Diese Kinematik trägt der Erfahrung Rechnung, dass Kopfstützen zur Optimierung des Komfort vom Sitzinsassen häufig niedriger eingestellt werden als aus Sicherheitserwägungen erforderlich.After the accident situation has ended, the cushion segment 9 can be returned to the use position by inserting a probe into the recess 8 from the rear of the headrest through a bore 16 running coaxially to the telescopic axis X and connecting it centrally to the flange plate 13, for example by screwing it in in a corresponding thread. By withdrawing the probe (return force F RH ), the tube segments 12 of the telescope 11 are pushed into one another and locked under prestress of the compression spring 15, so that the headrest is again in its starting position. In the embodiment according to FIG. 3, the cushion segment 9 can be displaced obliquely upwards from the position of use relative to the base body 1 into the safety position shown, so that it is not only in the direction of travel (-X direction) but also in height (+ Z direction). This kinematics takes into account the experience that head restraints are often set lower by the occupant to optimize comfort than is necessary for safety reasons.
Das Teleskop 11 ist einerseits über einen ersten angeschrägten Stückbock 17 am vertikal ausgerichteten Trägerelement 3 befestigt, anderseits über einen gegenläufig angeschrägten zweiten Stückbock 18 mit dem Polstersegment 9 verbunden und in Fahrtrichtung gegenüber der Horizontalen um einen Winkel α von 25° nach oben geneigt. Die oberen und unterenThe telescope 11 is fastened on the one hand to the vertically aligned support element 3 via a first beveled trestle 17, on the other hand connected to the upholstery segment 9 by means of an oppositely beveled second trestle 18 and inclined upward in the direction of travel relative to the horizontal by an angle α of 25 °. The top and bottom
Begrenzungsflächen der Ausnehmung 8 und der in diese ragende Teil des Pölstersegments 9 weisen dabei eine parallel zur Teleskopachse X ausgerichtete Kontur auf, um die gewünschte Verschiebung zu ermöglichen. Die vom Kopf 10 des Sitzinsassen beim Auftreffen auf das Polstersegment ausgeübte Rückstellkraft FRI wird relativ zur geneigten Teleskopachse X schräg in das Teleskop 11 eingeleitet. Bei einem Teleskop, das aus tiefgezogenen Rohrabschnitten aus Stahlblech besteht, die mit einer leichten Spielpassung (Durchmesserdifferenz maximal 50 μ ) ineinandergefügt sind, ergibt sich infolge einer gegenüber der Teleskopachse X um einen Winkel von 25° geneigten Krafteinleitung bereits eine ausreichende Hemmung im Teleskop 11. Für andere Werkstoffpaarungen oder Passungen läßt sich die erforderliche Neigung (ebenso die bei der eingangs beschriebenen Ausführung vorzusehende Exzentrität) nach den üblichen Regeln des Maschinenbaus berechnen. Selbstverständlich ist es dabei auch möglich, eine Neigung mit einer exzentrischen Krafteinleitung zu kombinieren. Boundary surfaces of the recess 8 and the part of the cushion segment 9 projecting into it have a contour oriented parallel to the telescopic axis X in order to enable the desired displacement. The restoring force FRI exerted by the head 10 of the seat occupant when it hits the cushion segment is introduced obliquely into the telescope 11 relative to the inclined telescopic axis X. In the case of a telescope consisting of deep-drawn tubular sections made of sheet steel, which are fitted into one another with a slight clearance fit (maximum diameter difference 50 μ), there is sufficient inhibition in the telescope 11 due to the introduction of force at an angle of 25 ° with respect to the telescope axis X. For other material pairings or fits, the required inclination (as well as the eccentricity to be provided in the design described at the beginning) can be calculated according to the usual rules of mechanical engineering. Of course, it is also possible to combine an inclination with an eccentric application of force.

Claims

Bezugszeichen1 Grundkörper (der Kopfstütze)2 Polsterung3 Trägerelement4 Haltestange5 Rückenlehne6 Gelenk7 Linearführung8 Ausnehmung9 Polstersegment10 Kopf (des Sitzinsassen)11 Teleskop12 Rohrabschnitt13 Flanschplatte14 Kraftübertragungseinrichtung15 Druckfeder16 Bohrung17 Stützbock18 StützbockX TeleskopachseFF FederkraftFm Rückstell kraft des KopfesFR2 Rückstellkraft (exzentrisch)FRH Rückholkraft α Winkel Patentansprüche Reference number1 base body (of the headrest) 2 padding3 support element4 support rod5 backrest6 articulation7 linear guide8 recess9 cushion segment10 head (of the seat occupant) 11 telescope12 tube section13 flange plate14 force transmission device15 compression spring16 bore17 support bracket18 support bracketX telescopic axisFF spring forceFm restoring force of the headFR2 restoring force restoring force (return force)
1. Mit der Rückenlehne (5) eines Fahrzeugsitzes verbundene Kopfstütze mit einem relativ zum Grundkörper (1) der Kopfstütze lageveränderlichen Polstersegment (9), das im Falle eines Unfalls unter der Wirkung einer Krafterzeugungseinrichtung aus der Gebrauchsstellung zum Kopf (10) des Sitzinsassen hin in eine Sicherheitsstellung veriagerbar und mittels einer Feststelleinrichtung in dieser arretierbar ist, dadurch gekennzeichnet, dass die Feststelleinrichtung ein Teleskop (11) umfaßt, das sich einerseits am Grundkörper (1) abstützt und andererseits mit dem verlagerbaren Polstersegment (9) verbunden ist, wobei die auf das Polsterelement wirkenden Rückstellkräfte (FR) in einer von der Teleskopachse (X) abweichenden Richtung in das Teleskop einleitbar sind.1. With the backrest (5) of a vehicle seat connected headrest with a position relative to the base body (1) of the headrest variable pad segment (9), which in the event of an accident under the action of a force generating device from the use position to the head (10) of the seat occupant a safety position is displaceable and can be locked in it by means of a locking device, characterized in that the locking device comprises a telescope (11) which is supported on the one hand on the base body (1) and on the other hand is connected to the displaceable cushion segment (9), the on the Restoring forces (FR) acting in the cushion element can be introduced into the telescope in a direction deviating from the telescopic axis (X).
2. Kopfstütze nach Anspruch 1 , dadurch gekennzeichnet, dass sich das Teleskop (11) einerseits am Grundkörper (1) abstützt und andererseits mittels einer exzentrisch zur Teleskopachse (X) wirkenden Kraftübertragungseinrichtung (14) mit dem verlagerbaren Polstersegment (9) verbunden ist.2. Headrest according to claim 1, characterized in that the telescope (11) is supported on the one hand on the base body (1) and on the other hand is connected to the displaceable cushion segment (9) by means of a force transmission device (14) acting eccentrically to the telescope axis (X).
3. Kopfstütze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kraftübertragungseinrichtung (14) einen Bolzen umfaßt, welcher eine in Fahrtrichtung endseitig am Teleskop (11) angeordnete Flanschplatte (13) und das verlagerbare Polstersegment (9) exzentrisch zur Teleskopachse (X) miteinander verbindet. 3. Headrest according to one of the preceding claims, characterized in that the force transmission device (14) comprises a bolt which has a flange plate (13) arranged at the end on the telescope (11) in the direction of travel and the displaceable cushion segment (9) eccentrically to the telescope axis (X) connects with each other.
4. Kopfstütze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Teleskop (11) gegenüber der Horizontalen (X- Richtung des Fahrzeugs) geneigt angeordnet ist.4. Headrest according to one of the preceding claims, characterized in that the telescope (11) is arranged inclined to the horizontal (X direction of the vehicle).
5. Kopfstütze nach Anspruch 4, dadurch gekennzeichnet, dass die Neigung 10° bis 45°, bevorzugt etwa 20° bis 25° beträgt.5. Headrest according to claim 4, characterized in that the inclination is 10 ° to 45 °, preferably about 20 ° to 25 °.
6. Kopfstütze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Teleskop (11) eine Anzahl ineinander verschieb- licher Rohrabschnitte (12) umfaßt.6. Headrest according to one of the preceding claims, characterized in that the telescope (11) comprises a number of mutually displaceable tube sections (12).
7. Kopfstütze nach Anspruch 6, dadurch gekennzeichnet, dass die Rohrabschnitte (12) einen kreisringförmigen Querschnitt aufweisen.7. Headrest according to claim 6, characterized in that the tube sections (12) have an annular cross section.
8. Kopfstütze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Krafterzeugungseinrichtung mindestens eine in Gebrauchsstellung vorgespannte Druckfeder (15) umfaßt.8. Headrest according to one of the preceding claims, characterized in that the force generating device comprises at least one prestressed compression spring (15) in the use position.
9. Kopfstütze nach Anspruch 8, dadurch gekennzeichnet, dass durch die Druckfeder(n) (15) eine zentrisch zur Teleskopachse (X) wirkende Verschiebekraft (Federkraft FF) erzeugbar ist.9. Headrest according to claim 8, characterized in that a displacement force (spring force F F ) acting centrally to the telescopic axis (X) can be generated by the compression spring (s) (15).
10. Kopfstütze nach Anspruch 9, dadurch gekennzeichnet, dass die Krafterzeugungseinrichung eine Druckfeder (15) aufweist, welche das Teleskop (11) koaxial zur Teleskopachse (X) umgibt. 10. Headrest according to claim 9, characterized in that the force generating device has a compression spring (15) which surrounds the telescope (11) coaxially to the telescopic axis (X).
11. Kopfstütze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zum Instandsetzen der Kopfstütze nach Beendigung der Unfallsituation eine zentrisch zur Teleskopachse (X) wirkende Rückholkraft (FRH) auf das dem Polsterelement (9) zugewandte Ende des Teleskops (11 ) aufbringbar ist.11. Headrest according to one of the preceding claims, characterized in that a return force (F RH ) acting centrally on the telescopic axis (X) can be applied to the end of the telescope (11) facing the cushion element (9) in order to repair the headrest after the accident situation has ended ,
12. Kopfstütze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kopfstütze mittels Haltestangen (4) bevorzugt stufenlos höheneinstellbar mit der Rückenlehne (5) verbunden ist.12. Headrest according to one of the preceding claims, characterized in that the headrest is preferably connected to the backrest (5) by means of holding rods (4), preferably continuously adjustable in height.
13. Kopfstütze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kopfstütze bevorzugt stufenlos um eine Rotationsachse drehverstellbar mit der Rückenlehne (5) verbunden ist. 13. Headrest according to one of the preceding claims, characterized in that the headrest is preferably connected to the backrest (5) so as to be rotatably adjustable about an axis of rotation.
EP03706424A 2002-02-05 2003-02-04 Head rest for the seat of a vehicle Withdrawn EP1474309A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10204724 2002-02-05
DE10204724 2002-02-05
DE10215137A DE10215137B4 (en) 2002-02-05 2002-04-05 Headrest for a vehicle seat
DE10215137 2002-04-05
PCT/EP2003/001081 WO2003066371A1 (en) 2002-02-05 2003-02-04 Head rest for the seat of a vehicle

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WO (1) WO2003066371A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT6795U1 (en) * 2002-11-29 2004-04-26 Hirtenberger Automotive Safety PYROTECHNICALLY ACTIVATED HEADREST
DE102004062097B4 (en) * 2004-12-23 2007-01-18 Daimlerchrysler Ag Energy absorbing device
KR100884452B1 (en) * 2007-10-04 2009-02-20 지엠대우오토앤테크놀로지주식회사 Rotating headrest for adjusting distance of passenger head and headrest
DE102009053211B4 (en) * 2009-11-06 2014-08-14 Faurecia Autositze Gmbh Manually adjustable headrest for a vehicle seat
KR101198547B1 (en) 2011-02-01 2012-11-06 안동시 The vehicle is equipped with shock absorbers headrests
FR3017081A1 (en) * 2014-02-04 2015-08-07 Peugeot Citroen Automobiles Sa DEVICE FOR SUPPORTING A HEAD AND / OR NECK, WITH A COVER AND EXTENSIBLE SHOCK, FOR A SEAT BACK
KR102001122B1 (en) * 2018-04-09 2019-07-17 황성일 Head rest for cars seat

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4856848A (en) * 1988-06-30 1989-08-15 General Motors Corporation Manual headrest
DE3900495A1 (en) * 1989-01-10 1990-07-26 Bayerische Motoren Werke Ag Head restraint for a motor-vehicle seat
DE19712663C2 (en) * 1997-03-26 2000-09-14 Daimler Chrysler Ag headrest
DE59903813D1 (en) * 1998-07-23 2003-01-30 Grammer Automotive Gmbh Headrests for motor vehicle seats
GB2347078B (en) * 1999-02-26 2002-12-18 Autoliv Dev Improvements in or relating to a head-rest

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03066371A1 *

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