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WO2004030981A1 - Ensemble appuie-tete pour siege de vehicule - Google Patents

Ensemble appuie-tete pour siege de vehicule Download PDF

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Publication number
WO2004030981A1
WO2004030981A1 PCT/DE2003/003313 DE0303313W WO2004030981A1 WO 2004030981 A1 WO2004030981 A1 WO 2004030981A1 DE 0303313 W DE0303313 W DE 0303313W WO 2004030981 A1 WO2004030981 A1 WO 2004030981A1
Authority
WO
WIPO (PCT)
Prior art keywords
headrest
arrangement according
backrest
guide
longitudinal direction
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.)
Ceased
Application number
PCT/DE2003/003313
Other languages
German (de)
English (en)
Inventor
Jochen Hofmann
Christina Schwerdtner
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
Priority to EP03798872A priority Critical patent/EP1545930A1/fr
Publication of WO2004030981A1 publication Critical patent/WO2004030981A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B60N2/80—Head-rests
    • B60N2/806—Head-rests movable or adjustable
    • 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 headrest arrangement for a motor vehicle seat according to the preamble of patent claim 1.
  • Such a headrest arrangement comprises a backrest frame for a backrest of the motor vehicle seat, which extends along a backrest longitudinal direction; an upper edge of the backrest frame, which limits the backrest frame in an upright functional position in the longitudinal direction of the backrest upwards; a (preferably height-adjustable) headrest arranged on the backrest frame in the longitudinal direction of the backrest above the upper edge of the backrest frame and having a headrest body; if necessary, a device for adjusting the height of the headrest by moving the headrest body along the longitudinal direction of the backrest; and additionally a device for adjusting the headrest in the event of a crash, in order to move the headrest body in the direction of the head of a vehicle occupant located on the corresponding motor vehicle seat.
  • the pivoting movement takes place about a virtual (fictitious) axis, ie about a pivot axis that lies outside the storage area, via which the headrest is arranged or mounted on the backrest frame (pivotable).
  • the device for crash-related adjustment of the headrest defines a pivot axis about which the headrest body can be pivoted in the event of a crash, but which is not given by a physical connection area between the headrest body and the backrest frame, but rather lies outside of this connection area.
  • connection area between the headrest body and the backrest frame, which includes a pivoting movement about a virtual (ie not physically-objective) pivot axis spaced from this connection area.
  • the upright functional position of the backrest frame is understood to mean a position of the backrest frame in which, based on the state of the corresponding vehicle seat installed in a motor vehicle, it extends essentially along the vertical vehicle axis.
  • the longitudinal backrest direction of the backrest frame is understood to be the direction along which the spine of a vehicle occupant located on the corresponding motor vehicle seat extends. If the backrest frame is in its upright functional position, the backrest longitudinal direction runs essentially along the vertical vehicle axis.
  • a headrest arrangement of the type mentioned is known from DE 100 51 344 C1.
  • the headrest pivots about a fictitious (virtual) horizontal axis which, during the pivoting movement, moves downward from a position in which it is in front of the headrest to a position in which it is in front of the backrest frame.
  • the pivot axis of the headrest in the known arrangement runs at the beginning of the pivoting movement in a horizontal plane that intersects the headrest and at the end of the pivoting movement in a horizontal plane that intersects the backrest of the corresponding motor vehicle seat in an area that supports the back serves a vehicle occupant.
  • DE 22 06 329 C2 describes a headrest for motor vehicle seats which is pivoted about a pivot axis formed by a physical pivot joint in the event of a frontal impact of the motor vehicle, the pivot axis being formed on a backrest frame which extends above the upper edge of the backrest of the corresponding vehicle seat extends.
  • DE 196 50 321 A1 discloses a device for adjusting the inclination (angular position) of a headrest on a seat back of a motor vehicle seat, which is formed by a swivel joint which extends below the upper edge of the corresponding backrest.
  • DE 100 58 518 A1 describes a vehicle seat with a headrest which is pivotably articulated on a constriction of a bearing bush for the headrest below the upper edge of the backrest frame.
  • EP 1 029 736 A1 discloses a headrest which is arranged above a backrest and, in the event of a crash, is moved forward in the direction of the head of a vehicle occupant.
  • the invention is based on the problem of further improving a headrest arrangement of the type mentioned at the outset.
  • the pivot axis about which the headrest is pivoted in the event of a crash lies during the entire pivoting movement of the headrest — viewed in the longitudinal direction of the backrest — above the upper edge of the backrest frame or at least at the same height as the upper edge of the backrest frame.
  • the pivot axis of the headrest extends horizontally above the upper edge of the backrest frame during the pivoting movement (perpendicular to the longitudinal direction of the backrest or to the vertical vehicle axis) means that the pivoting movement of the headrest is not influenced by a collision of the headrest with the seat cushion can be. In the event of a crash, the headrest therefore moves in a defined and reliable manner along a predetermined path, which enables the head of a vehicle occupant to be protected to be optimally supported.
  • the pivot axis of the headrest forms a virtual (fictitious) axis which lies outside the bearing points, via which the headrest is pivotably arranged on the backrest frame.
  • the pivot axis can also be moved during the crash-related pivoting of the headrest.
  • the swivel axis always remains above the upper edge of the backrest frame.
  • the axis running above the upper edge of the backrest frame is a virtual axis, it is not necessary to provide an additional backrest frame defining the pivot axis above the backrest frame. Rather, the device provided for triggering the crash-related adjustment movement can be provided below the upper edge of the backrest frame and arranged there (integrated into this).
  • the swiveling movement takes place in such a way that the headrest body is moved upwards in the longitudinal direction of the backrest on the one hand and forwardly transversely to the longitudinal direction of the backrest to support the head of a vehicle occupant in the event of a crash.
  • a combined lifting and swiveling of the headrest body can e.g. in that the virtual swivel axis moves during the crash-related adjustment movement. It is always located on or above the upper edge of the backrest frame, but changes its position in the longitudinal direction of the backrest, in particular by moving it upward (viewed in the longitudinal direction of the backrest), in addition to the desired pivoting of the headrest forward (in the direction of the head of a vehicle occupant) to cause a lifting of the headrest body.
  • the virtual swivel axis therefore does not have to be a spatially fixed axis, but rather can be spatially changeable (during the respective crash-related adjustment movement).
  • the device for adjusting the height of the headrest in the longitudinal direction of the backrest as a comfort function in normal operation has at least one guide rod, preferably two guide rods, which are displaceably mounted in the longitudinal direction of the backrest and on which the headrest body is fixed.
  • the guide rods can in particular be guided in a longitudinally displaceable manner on a base plate provided on the backrest frame.
  • the device for crash-related adjustment of the headrest serves in this case to lift and pivot the guide rods, which take the headrest body with them when they pivot.
  • the device for lifting and pivoting the headrest can in particular engage the base plate on which the guide rods of the headrest are guided in a longitudinally displaceable manner and adjust this base plate in such a way that the desired lifting and pivoting movement of the headrest is generated.
  • the device for adjusting the height of the headrest along the longitudinal direction of the backrest and the device for adjusting the headrest in the event of a crash can be combined to form a structural unit which can preferably be mounted outside the backrest frame and then completely pre-assembled in the backrest frame.
  • the pivot axis of the headrest extends above the upper edge of the backrest frame in such a way that it cuts the guide rods of the headrest. It is therefore in the plane defined by the guide rods.
  • the pivot axis is then not only in the longitudinal direction of the backrest above the upper edge of the backrest frame, but is also arranged with respect to the backrest frame in such a way that a straight line intersecting the pivoting axis and extending in the longitudinal direction of the backrest extends through the upper edge of the backrest frame.
  • the swivel axis therefore lies in an imaginary extension of the backrest frame beyond its upper edge.
  • the pivot axis can also be arranged at other points above the upper edge of the backrest, in particular also at a distance from the backrest frame next to the backrest frame (in front or behind) transversely to the longitudinal direction of the backrest.
  • two can be arranged one behind the other in the longitudinal direction of the backrest on the backrest frame
  • Guide devices may be provided. Both guide devices are preferably below the upper edge of the backrest frame. By means of a suitable design of the guide devices arranged below the upper edge of the backrest frame, it can be achieved that the adjustment movement generated by these guide devices includes a pivoting movement, the virtual pivot axis of which runs above the upper edge of the backrest (transverse to the backrest longitudinal direction).
  • the two guide devices preferably comprise guide means provided in pairs on both sides of the headrest on the side of the backrest frame, in particular in the form of guideways, which can be formed, for example, by a guide link in each of which the headrest engages with corresponding guide elements, so that the guide elements move along the guide links Headrest can be swiveled in the event of a crash.
  • the guide devices are coordinated with one another in such a way that when the backrest is folded forward, a pivoting movement takes place about a virtual axis above the upper edge of the backrest.
  • the upper guideway in the longitudinal direction of the backrest i.e. the guideway located closer to the upper edge of the backrest frame, extends essentially along the longitudinal direction of the backrest or is only slightly inclined to it.
  • the lower guideway in the longitudinal direction of the backrest has a greater inclination, so that a pivoting movement is generated in the two guideways by guiding one guide element assigned to each headrest.
  • the arrangement of the upper guideway along the longitudinal direction of the backrest ensures that the pivot axis is located above the upper edge of the backrest frame.
  • the lower guideway which is more inclined to the longitudinal direction of the backrest, is of particular importance for the generation of the pivoting movement about that axis.
  • the lower (or upper) guideway viewed in the longitudinal direction of the backrest or both guideways can be replaced by a pivotably mounted guide lever which is articulated at one end to the backrest frame and at the other end to an assembly of the headrest.
  • both guide devices can each be optionally formed by at least one guide track or at least one guide lever, so that both Guide devices can be formed by guide tracks, both guide devices by guide levers or one guide device (the upper or lower) by guide tracks and the other (lower or upper) guide device by guide levers.
  • an energy store can be provided, which preferably provides chemical or elastic energy.
  • the energy store is formed by an elastic means, in particular in the form of at least one spring element, which is biased against the headrest in such a way that it tends to adjust the headrest, a locking device counteracting the adjustment movement of the headrest for as long as how the locking device has not been unlocked due to a crash.
  • the locking device may comprise a primary locking element which acts directly on an assembly of the headrest to prevent an adjustment movement of the headrest and a secondary locking element which holds the primary locking element in a position in which it prevents an adjustment of the headrest, and which in a crash case is actuated such that the primary locking element can move into a position in which it no longer counteracts the adjustment movement of the headrest.
  • a corresponding movement of the primary locking element can be achieved in that it is acted upon by an elastic element in such a way that it automatically assumes a position releasing the headrest when it is no longer blocked by the secondary locking element.
  • the backrest can in particular be locked without play.
  • a signal that generates an actuator for. B. in the form of an electromagnet, an electric motor or a pyrotechnic charge, triggers, which in turn unlocks the locking device.
  • the pressure of a vehicle occupant's body on the vehicle seat (using an impact plate) or the activation of a seat belt pretensioner can be used to unlock the locking device.
  • the corresponding forces can, for example, be transmitted from the impact plate or the belt tensioner to the locking device via traction means (rope) or a lever arrangement (linkage).
  • a mass pendulum coupled to a lever element can be provided, which is deflected by the negative acceleration occurring in the event of a crash and thereby triggers a corresponding movement of the associated lever element, which in turn acts on the locking device for unlocking.
  • the locking device of the headrest and the associated trigger mechanism for unlocking the locking device in the event of a crash are intended to ensure that the adjustment movement of the headrest actually only takes place when the intended crash-typical conditions are present on the vehicle.
  • a reset lock is also provided, which can be formed in particular on one of the guide devices of the headrest and which counteracts a reset of the headrest after completion of a crash-related adjustment movement. This ensures that the headrest is continuously available for supporting the head of a vehicle occupant after completion of the adjustment movement and does not return to its original position due to the impact of the head on the headrest.
  • the reset lock is preferably designed in such a way that it is activated to prevent a reset when the headrest body is loaded in the support direction, that is, when the head provides support for the head of a vehicle occupant seated on the corresponding vehicle seat and facing the vehicle occupant that vehicle occupant is loaded (e.g. by impact of the head on the support surface with direction of action against the vehicle's longitudinal axis to the rear). It is therefore a passive reset lock that is activated by the vehicle occupant to be protected, even if it hits the headrest.
  • form-locking elements in the form of v ⁇ toothing elements on the guideways can be provided as a reset lock, by means of which d headrests are guided during pivoting, the toothing elements interacting in an associated toothing area of the guiding element of the headrest guided in the respective guideway in such a way that a movement d counteracts the headrest the previously completed adjustment movement is prevented.
  • the interlocking toothed areas become disengaged and thus enable a return movement of the headrest.
  • the required exertion of a pressure force on the head restraint forward (in the vehicle longitudinal direction) is opposite to the direction along which the head of a vehicle occupant would collide with his head restraint in the event of a crash. This prevents a resetting movement of the headrest from being triggered by the impact of the corresponding vehicle occupant on his headrest.
  • the energy storage device used to activate the safety function for. B. an energy storage zi storage of elastic energy (spring energy) is automatically loaded again.
  • 1a shows an exploded view of a headrest arrangement with a headrest which is height-adjustable with respect to a backrest frame and which can additionally be pivoted in the event of a crash;
  • FIG. 1b shows the headrest arrangement from FIG. 1a in a perspective representation
  • FIGS. 1a and 1b shows a side view of the headrest arrangement from FIGS. 1a and 1b;
  • FIG. 2a shows the headrest arrangement from FIG. 1a after the pivoting of the
  • FIG. 2b is a perspective view of the headrest arrangement from FIG. 1a after the headrest has been pivoted;
  • Fig. 2c is a side view of the headrest arrangement of Figure 1a after
  • FIG. 3a shows a device for locking the headrest from FIG. 1a in its
  • 3b shows the locking device after unlocking
  • FIG. 4 shows a schematic illustration of a pivoting movement of the headrest from FIGS. 1a to 2c;
  • FIGS. 5a and 5b show a first modification of the headrest arrangement from FIGS. 1a to
  • Fig. 6 shows a second modification of the headrest arrangement according to the figures
  • FIGS. 1a to 7a shows a third modification of the headrest arrangement from FIGS. 1a to
  • FIGS. 1a to 1c together with FIG. 3a show a headrest arrangement for a motor vehicle seat with a headrest assembly 1 (also simply called headrest in the present case) which has a headrest body 10 fastened to two guide rods 11, 12 in the form of guide rails.
  • the two guide rods 11, 12 are accommodated in a longitudinally displaceable manner in guide sleeves 21, 22 which are provided on a base plate 20 of a headrest support 2 and from whose upper end sections 21a, 22a the guide rods 11, 12 with the headrest body 10 protrude.
  • the headrest assembly 1 is fixed via the headrest support 2 to a backrest frame 5 of a motor vehicle seat, which comprises two backrest side parts 51, 52 and a backrest head 50.
  • the backrest head 50 forms the upper end section of the backrest frame 5 and defines its upper edge O.
  • the backrest frame 5 extends along a longitudinal direction L of the backrest, which essentially corresponds to the direction of extension of the spine of a person located on the corresponding vehicle seat and leaning on the backrest.
  • the backrest longitudinal direction L runs along the vertical vehicle axis (z-axis).
  • the height h of the headrest body 10 By shifting the guide rods 11, 12 in the associated guide sleeves 21, 22, which extend along the backrest longitudinal direction L, the height h of the headrest body 10 with respect to the upper edge O of the backrest frame 5, ie, the distance of the headrest body 10 from the upper edge O the backrest frame 5 adjustable.
  • Different manual or power-operated (electrical) drives are known for this purpose, which can be arranged on the base plate 20 or on the headrest assembly 1.
  • the illustration of a drive for adjusting the height h of the headrest body 10 has been dispensed with here, since the present invention is independent of the type of drive used for adjusting the height h of the headrest body 10.
  • a device for pivoting the headrest body 10 in the event of a crash by means of which a pivoting movement of the headrest body 10 can be generated, by means of which the headrest body 10 can be pivoted in an upward direction along the Backrest longitudinal axis L and forward in a direction V perpendicular to the backrest longitudinal axis L.
  • the headrest body 10 should be forward against the head and neck of the vehicle occupants located on the corresponding vehicle seat are guided and at the same time prevented that the vehicle occupant's head gets into the area between the upper edge of the headrest body 10 and the headlining.
  • a swiveling movement which, in addition to moving the headrest body 10 forward in a direction V perpendicular to the longitudinal axis L of the backrest, also results in a substantial movement of the headrest body 10 upward along the longitudinal axis L of the backrest can be achieved (with the headrest body essentially in an upright position along the longitudinal direction of the backrest) before the crash occurs) e.g. generate in that the pivot axis about which that pivoting movement takes place during the adjustment movement of the headrest.
  • pivoting movement does not necessarily mean a (precisely defining a circular movement) pivoting movement about a spatially fixed axis, but rather generalizes a pivoting movement about a spatial one variable axis which, in addition to a movement of the headrest body 10 in a direction V to the front, also causes a substantial movement of the headrest body 10 along the longitudinal axis L of the backrest upwards.
  • the device for pivoting the headrest body 10 engages on the base plate 20 of the headrest support 2 belonging to the headrest assembly 1 and comprises two tension springs 31, 32 arranged parallel to one another and extending in the longitudinal direction L of the backrest, each with its lower end 31a or 32a on an extension 2a of the headrest support 2 and with their upper ends 31b and 32b are hung on the backrest head 50.
  • the two spring elements 31, 32 are pre-stressed in such a way that they have the tendency to raise the base plate 20 of the headrest support 2 and thus the headrest 1 as a whole along the longitudinal direction L of the backrest.
  • a movement of the headrest 1 together with the headrest support 2 under the action of the prestressed spring elements 31, 32 is prevented by a locking device 4 which is arranged on a support 40 fixed to the backrest frame.
  • This locking device 4 comprises a primary locking element 41 pivotably mounted about an axis 43 in the form of a locking lever with a recess 41a which, in the locked state of the locking device 4, engages around an extension (bolt 45) projecting from the base plate 20 of the headrest support 2. This will cause a movement of the Base plate 20 relative to the backrest frame-fixed support 40 of the locking device 4 and thus a movement of the headrest assembly 1 as a whole with respect to the backrest frame 5 is prevented.
  • the primary locking element 41 is elastically pretensioned by means of an elastic element in the form of a tension spring 46 which engages with one end 46a on the locking element 41 and with the other end 46b on the carrier 40 in such a way that it tends to release the bolt 45 ,
  • a secondary locking element 42 which is pivotably mounted about a second axis 44 and which presses with a stop 42b against an associated stop 41b of the primary locking element 41 and therefore a movement of the primary locking element 41 under the action of the elastic element 46 prevented.
  • the secondary locking element 42 has a point of engagement 42a for an actuating device, which is triggered in the event of a crash and causes the secondary locking element 42 to pivot about its pivot axis 44.
  • a sensor-controlled actuator in the form of an electromagnet (lifting magnet), an electric motor or a pyrotechnic charge can be used, or a mass pendulum coupled to an actuating lever or a coupling mechanism that couples the secondary locking element 42 to a belt tensioner.
  • the secondary locking element 42 can be fixed, for example, using a further elastic element, not shown in the figures, in the position shown in FIG. 3a, in which it prevents the primary locking element 41 from moving about its pivot axis 43.
  • the force applied by the corresponding elastic element for fixing the secondary locking element 42 must be able to be overcome by the force which is applied when the secondary locking element 42 is actuated by an actuator, belt tensioner or the like.
  • the base plate 20 of the headrest support 2 is by means of guide elements 23, 24 and 25, 26 provided on the angled end faces of the base plate 20 in associated longitudinal guides (link guides ) 33, 34 or 35, 36 guided guide parts 53, 54.
  • the guide parts 53, 54 arranged on each longitudinal side 51, 52 of the backrest frame 5 each have two guide links 33 and 35 or 34 and 36 arranged one above the other in the longitudinal directions L.
  • the guide links 33, 34 and 35, 36 of one guide part 53 and other guide part 54, which are arranged at the same height along the longitudinal direction L of the backrest, are each identical.
  • the upper guide links 33, 34 in the backrest longitudinal direction run essentially parallel to the backrest longitudinal direction L and are only slightly inclined with respect to this. They therefore also extend essentially parallel to the guide rods 11, 12 in the region of their exit from the upper end sections 21a, 22a of the guide sleeves 21, 22.
  • the lower guide links 35, 36 are more inclined with respect to the backrest longitudinal direction L, in each case from front down to back up.
  • the desired pivoting movement of the headrest body 1 is achieved by the interaction of the guide links 33, 35 and 34, 36 arranged one above the other in the longitudinal direction L of the backrest, as will be explained in more detail below.
  • the locking device 4 assigned to the base plate 2 is unlocked by acting on the secondary locking element 42 by means of one of the mechanisms described above, as shown in FIG. 3b.
  • Said mechanism acts on the point of engagement 42a of the secondary locking element 42 and thus causes a pivoting movement of the secondary locking element 42 about its pivot axis 44, through which the support surface 42b of the secondary locking element 42 is moved away from the primary locking element 41, so that this under the Effect of the associated elastic element 46 can pivot about its axis 43.
  • the primary locking element 41 releases the bolt 45, so that a movement of the base plate 20 of the headrest wearer 2 no longer stands in the way of the spring elements 31, 32 acting on the base plate 20.
  • the movement of the primary locking element 41 about its axis 43 is also triggered or amplified by a stop 42c of the secondary locking element 42, which acts on an associated stop 41c of the primary locking element 41.
  • the base plate 20 of the headrest support 2 now moves upward. Due to the guidance of the base plate 20 by means of guide elements 23, 24; 25, 26 in associated guide links 33, 34 and 35, 36 perform a pivoting movement which corresponds to a combined movement in the longitudinal direction L of the backrest upwards and in a direction V perpendicularly to the front. This pivoting movement is transmitted directly to the headrest body 10 arranged on the headrest support 2 via the guide rods 11, 12.
  • Headrest body 10 on the one hand in its starting position before executing the
  • the pivoting movement S causes the headrest body 10 to be displaced upwards along the backrest longitudinal direction L on the one hand and perpendicularly to it in a direction V to the front, so that the headrest body 10 faces the head of a person on the corresponding motor vehicle seat Vehicle occupants moves and in particular overlaps the head in such a way that it cannot pass over the upper edge of the headrest body 10.
  • the pivoting movement S corresponds to a movement about a virtual axis A, which extends horizontally, ie perpendicularly to the longitudinal direction L of the backrest L, above the upper edge O of the backrest head 50 (see FIGS. 1a and 1b) and thereby the guide rods 11, 12 of the headrest assembly cuts.
  • the backrest cushion P provided on the backrest has a channel-shaped recess K of such size above the upper edge O of the backrest head that the Pivoting movement of the guide rods 11, 12 about the pivot axis A is not hindered by the cushion P.
  • the virtual pivot axis A lies above the upper edge O of the backrest head 50 and in particular also above the guide links 33, 35; 34, 36, by means of which the pivoting movement S about said virtual axis A is caused. Due to the above-described design of the guide link 33, 35; 34, 36 can thus be achieved that with an arrangement of these guide links 33, 35; 34, 36 on the backrest frame and below the upper edge O of the backrest head 50, the virtual pivot axis A is nevertheless above the upper edge O.
  • Figure 4 shows a particularly advantageous position of the pivot axis A above the upper edge O of the backrest head, in which it intersects the guide rods 11, 12 of the headrest 1 and thus in the plane spanned by the guide rods 11, 12 or directly above the upper edge O of the backrest head runs.
  • a straight line that extends in the longitudinal direction L of the backrest and intersects the pivot axis A would also cut the upper edge O of the backrest head.
  • Figure 4 shows only a snapshot of the pivot axis A, z. B. at the beginning of a crash-related adjustment movement of the headrest body 10. During the pivoting movement, a displacement of the pivot axis A can take place, this preferably remaining in the plane spanned by the guide rods 11, 12.
  • the pivot axis can also be arranged elsewhere above the upper edge O of the backrest head, for example perpendicularly to the backrest longitudinal direction L at a distance from the backrest frame in front of or behind the backrest frame. It is crucial that the swivel axis A lies in the longitudinal direction L of the backrest at a height which corresponds at least to the height of the upper edge O.
  • FIGS. 2a to 2c show the headrest arrangement from FIGS. 1a to 1c after the pivoting movement of the headrest 1 has been completed. It is clear from the figures that the guide elements 23, 24, 25 provided on the headrest assembly 1, more precisely on the base plate 20 of the headrest carrier 2 , 26 in the associated guide link 33, 34, 35, 36 have been moved from a lower end (lower stop) to an upper end (upper stop), under the effect of the spring elements 31, 32 acting on the base plate 20. This has to the pivoting movement of the headrest 1 in the end position shown in Figures 2a to 2c.
  • the guide link 34 is provided on one longitudinal side with a longitudinal toothing 34a to which a corresponding toothing 24a of the guide element 24 guided in the link 34 is assigned.
  • the toothings 24a, 34a are designed as helical toothings in such a way that, although they allow the guide element 24a to move upward in the longitudinal direction L of the backrest, which leads to the headrest 1 being pivoted, it does not move downward in the opposite direction.
  • the headrest assembly as a whole, and thus in particular the headrest body 10, is fixed in its end position after the pivoting movement has been carried out.
  • the interlocking toothed areas 24a, 34a thus serve as a reset lock with which a return movement of the headrest from the end position generated by pivoting is avoided.
  • FIGS. 5a and 5b show a modification of the arrangement from FIGS. 1a to 1c and 2a to 2c before the pivoting of the headrest body 10 (FIG. 5a) and after the pivoting of the headrest body 10 (FIG. 5b).
  • the reset lock for the headrest body 10 is not provided in the respective upper guide link 34 but in the guide link 36 underneath in the longitudinal direction L of the backrest.
  • This therefore has a toothing 36a on one longitudinal side, which interacts with an associated toothing 26a of the associated guide element 26 such that the guide element 26 can indeed be moved upward in the guide link 36; after reaching the upper end position (cf. FIG. 5b), it is not possible to return to the starting position (FIG. 5a).
  • a return movement of the headrest body 10 should be possible in that it is loaded in a direction V forward with a compressive or tensile force.
  • the toothing 36a is provided on the front long side of the link 36, while in the embodiment shown in FIGS. 1a to 2c the toothing 34a is arranged on the rear long side of the corresponding upper link 34.
  • the action of a compressive or tensile force on the backrest body 10 in a direction V to the front can disengage the corresponding toothings of the guide element and the guide link in order to enable a return movement of the headrest assembly 1.
  • FIG. 6 shows a modification of the headrest arrangement from FIGS. 1a to 1c with regard to the spring elements 31, 32, which generate the force required to execute the pivoting movement of the headrest.
  • the two spring elements 31, 32 are each arranged in the region of the guide parts 53, 54, each with their upper end (of which only an upper end 32b can be seen in FIG. 6) at a fastening point of the corresponding guide part 53, 54 and fixed with their respective lower end (of which only a lower end 32a can be seen in FIG. 6) to the guide element 26 guided in the respective lower guide link 36.
  • the spring elements 31, 32 are each fixed to the frame with one of the upper ends Guide parts 53, 54 and fixed with their lower ends via a guide element on the base plate 20 of the headrest assembly.
  • FIGS. 7a and 7b show a further modification of the headrest arrangement from FIGS. 1a and 1c, the respective lower guide link on the two guide parts 53, 54 being replaced by a guide lever in the form of a pivoting lever 37 and 38, respectively.
  • the two guide levers 37, 38 are articulated with their upper end 37a, 38a in the longitudinal direction L of the backrest to the respective guide part 53 and 54 and with the respective lower end 37b, 38b to an angled section of the base plate 20.
  • the pivoting movement of the headrest assembly is generated by a combination of the movement of guide elements 23, 24 in an upper guide link 33, 34 with a pivoting movement of the guide levers 37, 38 arranged below the guide link 33, 34 ,
  • the course of the upper guide links 33, 34 essentially parallel to the backrest longitudinal direction L or the direction of extension of the guide rods 11, 12 in the region of their exit from the guide sleeves 21, 22, means that the pivot axis about which the headrest body 10 crashes -conditionally can pivot, located above the upper edge of the backrest head of the corresponding backrest frame.

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

Abstract

L'invention concerne un ensemble appuie-tête pour un siège de véhicule comportant un bâti de dossier et un dossier, le bâti s'étendant dans le sens longitudinal du dossier. Le bord supérieur du bâti de dossier limite ce dernier vers le haut dans le sens longitudinal du dossier lorsqu'il est en position d'utilisation relevée. Un appuie-tête est disposé au-dessus du bord supérieur du bâti de dossier dans le sens longitudinal du dossier. Un dispositif sert à régler la hauteur du corps de l'appuie-tête en modifiant sa position relativement au bord supérieur du dossier. Un autre dispositif permet le déplacement de l'appuie-tête qui, en cas de collision, se soulève et pivote autour d'un axe virtuel de pivotement pour déplacer le corps de l'appuie-tête vers la tête de l'occupant du siège. L'invention est caractérisée en ce que, pendant toute la durée du déplacement de l'appuie-tête (1) provoqué par la collision, l'axe de pivotement (A) se trouve à la même hauteur que le bord supérieur (O) du bâti de dossier (5) ou au-dessus de ce bord supérieur (O).
PCT/DE2003/003313 2002-09-27 2003-09-26 Ensemble appuie-tete pour siege de vehicule Ceased WO2004030981A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03798872A EP1545930A1 (fr) 2002-09-27 2003-09-26 Ensemble appuie-tete pour siege de vehicule

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10246475.8 2002-09-27
DE10246475A DE10246475B4 (de) 2002-09-27 2002-09-27 Kopfstützenanordnung für einen Kraftfahrzeugsitz

Publications (1)

Publication Number Publication Date
WO2004030981A1 true WO2004030981A1 (fr) 2004-04-15

Family

ID=31984399

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/003313 Ceased WO2004030981A1 (fr) 2002-09-27 2003-09-26 Ensemble appuie-tete pour siege de vehicule

Country Status (3)

Country Link
EP (1) EP1545930A1 (fr)
DE (1) DE10246475B4 (fr)
WO (1) WO2004030981A1 (fr)

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US11864661B2 (en) 2021-05-05 2024-01-09 Steelcase Inc Body support assembly and methods for the use and assembly thereof

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DE102006002944B3 (de) * 2006-01-21 2007-03-29 Faurecia Autositze Gmbh Kraftfahrzeugsitz
JP2009154633A (ja) 2007-12-26 2009-07-16 Aisin Seiki Co Ltd 車両用シート
DE102011010232B4 (de) 2011-02-03 2013-01-17 Audi Ag Vorrichtung zum Verstellen einer Kopfstütze
DE102011012670B4 (de) * 2011-02-28 2013-11-14 Audi Ag Vorrichtung zum Verstellen einer Kopfstütze
DE102011081685B8 (de) 2011-08-26 2014-11-27 Audi Ag Kopfstützenanordnung für einen Fahrzeugsitz
DE102011081686B4 (de) 2011-08-26 2014-08-28 Audi Ag Kopfstützenanordnung für einen Fahrzeugsitz
CN104960444A (zh) * 2015-05-29 2015-10-07 苏州中航中振汽车饰件有限公司 具有头靠调节功能的商务车座椅
CN104924924A (zh) * 2015-05-29 2015-09-23 苏州中航中振汽车饰件有限公司 一种商务车多功能调节座椅

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Also Published As

Publication number Publication date
EP1545930A1 (fr) 2005-06-29
DE10246475A1 (de) 2004-04-08
DE10246475B4 (de) 2006-10-19

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