US20050035642A1 - Seat back for a vehicle seat comprising an integrated protective device - Google Patents

Seat back for a vehicle seat comprising an integrated protective device Download PDF

Info

Publication number
US20050035642A1
US20050035642A1 US10945788 US94578804A US2005035642A1 US 20050035642 A1 US20050035642 A1 US 20050035642A1 US 10945788 US10945788 US 10945788 US 94578804 A US94578804 A US 94578804A US 2005035642 A1 US2005035642 A1 US 2005035642A1
Authority
US
Grant status
Application
Patent type
Prior art keywords
part
back
position
upper
device
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.)
Abandoned
Application number
US10945788
Inventor
Ernst-Jurgen Hake
Hans-Joachim Muller
Gerhard Schmale
Lutz Strieder
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 Technology Co
Original Assignee
Johnson Controls Technology Co
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
Family has litigation

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B39/00Locking of screws, bolts or nuts
    • F16B39/22Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/282Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60NSEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00Seats specially adapted for vehicles
    • B60N2/80Head-rests
    • B60N2/806Head-rests movable or adjustable
    • B60N2/809Head-rests movable or adjustable vertically slidable
    • B60N2/812Head-rests movable or adjustable vertically slidable characterised by their locking devices
    • B60N2/815Release mechanisms, e.g. buttons
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60NSEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00Seats specially adapted for vehicles
    • B60N2/80Head-rests
    • B60N2/806Head-rests movable or adjustable
    • B60N2/838Tiltable
    • B60N2/841Tiltable characterised by their locking devices
    • B60N2/847Tiltable characterised by their locking devices with stepwise positioning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60NSEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00Seats specially adapted for vehicles
    • B60N2/80Head-rests
    • B60N2/806Head-rests movable or adjustable
    • B60N2/838Tiltable
    • B60N2/853Tiltable characterised by their adjusting mechanisms, e.g. electric motors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60NSEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00Seats specially adapted for vehicles
    • B60N2/80Head-rests
    • B60N2/888Head-rests with arrangements for protecting against abnormal g-forces, e.g. by displacement of the head-rest

Abstract

The invention concerns a seatback for a vehicle seat, having an integrated protective device. The protective device includes a device that generates a torque acting in a pivoting direction on an upper back part, a rear-end impact detector that is-in effective connection with the torque-generating device in such a way that the device is activated in the event of the rear-end impact and the pivoting motion is initiated, and an immobilization device for retention of the upper back part in the normal use position.

Description

    CROSS-REFERENCE TO RELATED PATENT APPLICATIONS
  • [0001]
    This application is a divisional of U.S. application Ser. No. 10/049,698, which was the National Stage of International Application No. PCT/EP00/07995, filed Aug. 16, 2000, which claimed the benefit of German Application No. 199 38 904.7, filed Aug. 17, 1999, all of which are incorporated by reference.
  • FIELD OF THE INVENTION
  • [0002]
    The present invention concerns a seatback for a vehicle seat, having an integrated protective device against accident-related injuries in the event of a rear-end impact, in particular against cervical vertebra syndrome or acceleration trauma, having a lower back part joined to a seat part and having a upper back part that is pivotable relative to the lower back part out of a normal use position, about an axis extending in the seatback transversely to the longitudinal vehicle axis, through an angular range in a pivoting direction pointing in the direction of travel, as a result of a torque acting in the pivoting direction.
  • BACKGROUND OF THE INVENTION
  • [0003]
    Many present-day developments in automotive engineering are aimed toward using available materials and design methods to make the seatbacks of vehicle seats lightweight but highly rigid, in order (despite the light weight) to withstand the large stresses that occur in an accident event and to sufficiently support the body of the vehicle occupant. The result of this, however, is that for example even in a so-called “fender-bender” accident or low-speed crash at low velocities in the range from 10 to 30 km/h, in which the body experiences an acceleration of approx. 8 to 20 G, damage to the body's neck musculature and cervical vertebrae can occur, since the impact force acts in almost undamped fashion on the person. An undesirable effect, called the “whip effect,” occurs on the head and neck, resulting in hyperextension and overstressing of the cervical vertebrae and support muscles of the head. This effect, and the spinal column injuries possible in particular in the neck region, are also referred to using the English term “whiplash.”
  • [0004]
    Passive and active apparatuses are known for protection against these injuries; the latter, in the event of an accident, are intended to actively decrease the distance between the person's head and the headrest of the seatback. One such known (active) apparatus of the kind cited above is described in DE 197 43 339 A1. In this context, the body of the vehicle occupant (seat user)— which in the event of an impact relative to the direction of travel is bent backward or accelerated, as a result of its inertia, into the seatback of the vehicle seat—encounters an impact panel that is mounted below the pivot axis of the upper back part and is joined pivotably to the upper back part, in particular to a headrest on the back part. The relative motion of the impact panel toward the rear causes the headrest to pivot forward. The motion of the headrest is intended to mitigate the whiplash effect.
  • [0005]
    It is disadvantageous in this context that the relative motion of the headrest does not occur until the occupant is thrown into the seatback. As a result, the upper back part can be accelerated only by a value that is equal, at most, to the acceleration value experienced by the vehicle seat as a result of the impact. Since the motion characteristics of the seat user cannot be accurately predicted in every case, however, in some circumstances the active counter-motion of the seatback or headrest may in fact cause incorrect, undesired, possibly dangerous effects. For example, the impact of the occupant's head can in fact be further amplified, and occupant “ramping” (vertical movement in the seat) also cannot be prevented. This is because in a rear-end impact, the occupant is accelerated into the seatback (which is usually tilted backward out of the vertical) in such a way that he or she tends to rise up along the seatback as if it were a ramp. This generally results in failure of the seatback, which buckles due to overload and is no longer capable of supporting the occupant. In particular, the seat user's head can end up at a height which is above the headrest, where it can no longer be supported. A considerable residual accident risk thus exists with the known seatback.
  • [0006]
    Mechanisms that are triggered by displacement of the vehicle occupant's body into the seatback opposite to the direction of travel do not exhibit the desired protective effect. The differing heights and therefore weights of vehicle users prove to be a particular disadvantage. Because of this, it is impossible to ensure reliably that the triggering device of a protective device is correct and effective. A further uncertainty factor is the delayed reaction of the previously disclosed mechanisms of this type. The configuration of the upholstery of the seatback also plays an important part; it should be as thin as possible in the region of the triggering device. This would in turn, however, result in an undesirable degradation of upholstery comfort.
  • [0007]
    It has therefore been proposed in German Patent Application 199 38 904.7 that reliable triggering of the protective device be performed, irrespective of the vehicle occupant's build, at a minimum acceleration which can be measured, for example, at the vehicle seat. In the case of a small car, the measured acceleration value is reached at a considerably lower impact speed than is the case for a sedan with a large absorbing crumple zone, or for a truck. The proposed protective device has on the one hand a device that, irrespective of the occupancy of the vehicle seat, generates the torque acting in the pivoting direction on the upper back part; on the other hand it comprises means for detecting a rear-end impact that are in effective connection with the torque-generating device in such a way that the device is activated in the event of the rear-end impact and the pivoting motion is initiated. Also provided in this context are immobilization means for retention of the upper back part in the normal use position, and immobilization means for retention of the upper back part against a backward motion out of the safety position into the normal use position.
  • [0008]
    It is the object of the present invention to create, using means of little design complexity, a seatback of the aforesaid kind whose protective device guarantees improved protection of the respective seat user against injury, in particular by way of an improved interception capability and damping when the head and upper body of the person present on the seat strike the headrest and seatback. The intention is to implement, in particular in the normal use position and additionally in the safety position, an effective immobilization system that nevertheless does not impede the triggering operation.
  • SUMMARY OF THE INVENTION
  • [0009]
    The object of the invention is achieved by a seatback of the kind cited initially in which the protective device comprises at least the following parts:
      • a device that, irrespective of any occupancy of the vehicle seat, generates the torque acting in the pivoting direction on the upper back part;
      • means for detecting a rear-end impact that are in effective connection with the torque-generating device in such a way that the device is activated in the event of the rear-end impact and the pivoting motion is initiated; and
      • immobilization means for retention of the upper back part in the normal use position, the immobilization means being constituted by a lever system, and the means for detecting a rear-end impact being in effective connection with the immobilization means for retention of the upper back part in the normal use position in such a way that in the event of the impact, the retention of the upper back part in the normal use position is nullified.
  • [0013]
    According to the present invention, in particular because of the unlocking of the lever system, pivoting of the upper back part can preferably proceed so quickly that the upper back part is in the safety position before the onset of any head motion of the seat user resulting from the rear-end impact. In the safety position, the upper back part rests directly against the seat user's body so that the user, despite the acceleration acting on him or her due to the impact, advantageously can no longer freely move backward against the vehicle's direction of travel and incur accidental injuries.
  • [0014]
    In the context of the seatback according to the present invention, it is particularly advantageous in terms of the efficiency of the protective device if a headrest is attached in or on the upper back part. It is useful in this context to mount the headrest, which as a rule is guided on holding rods for adjustment of the vertical position, in the backrest at the height of the shoulder region tiltably about an axis extending transversely to the vehicle axis. For this purpose, for example, an upper crossmember of the seatback can be attached in upper portions of the side members of the seatback by means of a pivot bearing. The upper back part can also, however, be configured in such a way that it assumes the function of a headrest. In any event, the person using the vehicle seat can as a result move uniformly into the seatback with decelerating energy absorption by the vehicle seat, with particular protection of the neck and head region. The result is that when the normal use position of the seatback exists, the headrest is in a so-called comfort position in which its spacing from a seat user's head can be approximately 40 to 110 mm. As a result of the pivoting motion of the upper back part, the headrest is then transferred into a so-called interception position, in which its spacing from a seat user's head is zero or almost zero. The normal use position and safety position of the upper back part thus correspond, when a headrest is present, to the latter's comfort position and interception position.
  • [0015]
    It is advantageous to provide a force storage device or energy storage device as the torque-generating device for the pivoting motion of the cross member carrying the headrest. A preloaded torsion spring, in particular, has proven advantageous in this context, since it possesses a very low intrinsic acceleration and therefore requires less installation space for the same effect as compared to tension or compression springs.
  • [0016]
    The lever system of the immobilization means for retention of the upper back part in the normal use position can preferably comprise at least two coacting levers. A first lever (hereinafter called the pawl) can brace the pivotable crossmember, preloaded by the torsion spring, with respect to a stationary counterbearing; while a second lever (hereinafter called the immobilization lever) acts as immobilizer for the pawl. In the event of a rear-end impact, the immobilization lever is pivoted in such a way that it releases the immobilization of the pawl. Triggering of the immobilization lever can be effected with a very low actuation force, thereby making possible a very fast lever movement and thus rapid unlatching of the pawl.
  • [0017]
    Actuation of the immobilization lever can preferably be accomplished with an electromagnet which obtains its pulse from a sensor, such as an acceleration sensor, that is used as a means for detecting the rear-end impact.
  • [0018]
    After release of the pawl, the latter pivots out of its bracing position; and the crossmember of the seatback, with the headrest, can move in the direction of the back of the vehicle occupant's head.
  • [0019]
    After a triggering of the protective device, the latter can be brought back into its initial position by once again activating the device that generates the torque acting on the upper back part (e.g. by tensioning the torsion spring); for safety reasons, this operation is to be performed only in a repair shop, in which seat functionality after a crash can concurrently also be checked.
  • [0020]
    It is particularly advantageous, in terms of reliably preventing a spring-back or bounce-back effect when the protective device takes effect, if the immobilization means for retention of the upper back part against a backward motion from the safety position into the normal use position (which means are also referred hereinafter to as the “recoil lock”) are embodied so that they make possible immobilization not only in the normal use position and in the safety position, but also in multiple positions located therebetween. This can be implemented, for example, by means of self-locking rolling-element or wedge-type locks that operate positively or nonpositively (preferably by jamming), or by means of a ratchet device. A suitable design of the recoil lock advantageously makes it possible to limit any recoil play of the upper back part (motion in the direction of the safety position) to a maximum angular magnitude of 1 degree.
  • [0021]
    Further advantageous embodiment features of the invention are contained in the dependent claims and in the description below.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0022]
    The invention will be explained more thoroughly, by way of example, with reference to the drawings, in which:
  • [0023]
    FIG. 1 is a perspective, partially schematic side view of a seatback according to the present invention;
  • [0024]
    FIG. 2 is a side view of a preferred embodiment of a seatback, with a depiction of a seat user;
  • [0025]
    FIG. 3 is a perspective depiction of the upper part of the seatback according to the present invention depicted in FIG. 2;
  • [0026]
    FIG. 4 is a sectional side view through the upper part of the seatback according to the present invention depicted in FIG. 3, in a central region (plane IV-IV-IV-IV);
  • [0027]
    FIG. 5 shows a further embodiment of a seatback according to the present invention in a sectioned side view corresponding to FIG. 4;
  • [0028]
    FIGS. 6 through 8 show three further embodiments of the immobilization means for retention of the upper back part against a backward motion out of the safety position into the normal use position of a seatback according to the present invention, in a sectioned side view corresponding to FIGS. 4 and 5;
  • [0029]
    FIG. 9 is a perspective view of an upper part of a further preferred embodiment of a seatback according to the present invention;
  • [0030]
    FIG. 10 is a side view of the embodiment depicted in FIG. 9 of a seatback according to the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • [0031]
    In the various Figures of the drawings, identical parts are always given the same reference characters, so that as a rule each is also described only once.
  • [0032]
    As is evident firstly from FIG. 1, a vehicle seat 1 comprises a seatback 2 according to the present invention and a seat part 3. Integrated into seatback 2 is a protective device that serves to protect the person in question against accident-related injuries, in particular cervical vertebra syndrome or acceleration trauma in the event of a rear-end impact. Seatback 2 has a lower back part 4 joined to seat part 3, and an upper back part 5 that is pivotable relative to lower back part 4 out of a normal use position (drawn with solid lines in FIG. 1), about an axis X-X extending in seatback 2 transversely to the longitudinal vehicle axis, through an angular range in a pivoting direction S pointing in direction of travel F into a safety position (drawn with dot-dash lines in FIG. 1), as a result of a torque acting in pivoting direction S.
  • [0033]
    According to the present invention, the protective device comprises on the one hand a device 6 that, irrespective of any occupancy of the vehicle seat 2, generates the torque (arrow M in FIG. 1) acting in pivoting direction S on upper back part 5, and on the other hand comprises means 7 for detecting a rear-end impact. Both torque-generating device 6 and detection means 7 can be differently configured. These parts of seatback 2 according to the present invention are therefore shown merely schematically (as boxes) in FIG. 1.
  • [0034]
    Torque-generating device 6 can advantageously, for example, be constituted by a force storage device or energy storage device, in particular by a preloaded spring element or multiple preloaded spring elements. In the various embodiments of the invention that are depicted in the further Figures, the torque-generating device is embodied as a leaf-shaped torsion spring (torsional spring 6 a) lying in pivot axis X-X of upper back part 5 that extends transversely to the longitudinal vehicle axis, which spring advantageously has a very low intrinsic acceleration and requires little installation space for the same effect as compared to tension or compression springs (cf. especially FIG. 3).
  • [0035]
    Means 7 for detecting the rear-end impact can advantageously be constituted by a vehicle crash sensor, such as an acceleration sensor. To detect a so-called low-speed crash, the vehicle crash sensor can be adjusted in such a way that it responds at an acceleration a of approximately 40 to 80 m/s2. As already mentioned, the acceleration value at which the sensor responds is based on the type and configuration of a particular motor vehicle (small car, sedan with absorbing crumple zone, truck).
  • [0036]
    Detection means 7 can be in effective connection with torque-generating device 6 in such a way that device 6 activates in the event of the rear-end impact and the pivoting motion of upper back part 5 is initiated. Lower back part 4 remains in its original (normal use) position.
  • [0037]
    In order to ensure optimum protection of the seat user, lower back part 4 and upper back part 5 can preferably be matched in defined fashion to one another in terms of their respective lengths (not characterized further); and axis X-X extending transversely to the longitudinal vehicle axis, about which upper back part 5 is pivotable, can be arranged at a defined height H in the shoulder region of a seat user, preferably approximately 400 to 580 mm above seat part 3.
  • [0038]
    Attached in or on upper back part 5 is a headrest 8 that in the event of a rear-end impact is moved out of a comfort position (drawn with solid lines in FIG. 1), in which its spacing (A1 in FIG. 2) from a seat user's head is approximately 80 to 120 mm, into an interception position (drawn with dot-dash lines in FIG. 1), in which its spacing (A2 in FIG. 2) from a seat user's head is zero or almost zero.
  • [0039]
    Also provided are immobilization means 9 for retention of upper back part 5 in the normal use position. The retention is illustrated by arrow A in FIG. 1. As will be described in further detail below with reference to FIGS. 3 through 5, these immobilization means 9 are constituted by a lever system. Arrow B in FIG. 1 indicates that immobilization means 9 can block the action of torque-generating device 6.
  • [0040]
    Means 7 for detecting a rear-end impact are in effective connection (arrow U in FIG. 1) with immobilization means 9 for retention of upper back part 5 in the normal use position in such a way that in the event of the impact, retention A of upper back part 5 in the normal use position, and blocking B of torque-generating device 6, are nullified.
  • [0041]
    Further immobilization means 10, whose effect is illustrated by arrow K in FIG. 1 and which are explained in more detail below with reference to FIGS. 4 through 8, can advantageously be provided to retain upper back part 5 against a backward motion out of the safety position into the normal use position.
  • [0042]
    In the embodiment of the invention just described, the protective device against accident-related injuries, integrated into seatback 2 and not further characterized as a whole, is thus constituted by: lower back part 4; upper back part 5, pivotable about axis X-X, having headrest 8; torque-generating device 6; means 7 for detecting a rear-end impact; immobilization means 9, configured as a lever system, for retention of upper back part 5 in the normal use position; and immobilization means 10 for retention of upper back part 5 against a backward motion out of the safety position into the normal use position.
  • [0043]
    FIG. 3, which shows an enlarged detail of seatback 2 according to the present invention depicted in FIG. 2 in the region of the transition from lower back part 4 to upper back part 5, illustrates a preferred concrete embodiment for device 6 which, irrespective of any occupancy of vehicle seat 2, generates torque M that acts in pivoting direction S on upper back part 5; for immobilization means 9, configured as a lever system, for retention of upper back part 5 in the normal use position; and for immobilization means 10 (recoil lock) for retention of upper back part 5 against backward motion out of the safety position into the normal use position.
  • [0044]
    As has already been mentioned, torque-generating device 6 in FIG. 3 is configured as a preloaded spring element, specifically as a leaf-shaped torsion spring 6 a mounted in upper back part 5. With a torsion spring 6 a of this kind, it is advantageously possible to generate very high displacing forces or a very high torque M, which enables pivoting of upper back part 5 in a matter of milliseconds. It has proven advantageous for the spring element if it exhibits a descending characteristic curve that exhibits high initial force to generate strong acceleration, but only a very low final force. This takes into account particularly the fact that because of its arrangement in the vehicle, upper back part 5 experiences as a result of the crash an acceleration that goes against the action of the spring element. It is, in particular, extremely advantageous if torque-generating device 6 is designed in such a way that in the event of its activation, upper back part 5 is accelerated in pivoting direction S at a magnitude greater than a measured (or, preferably, an empirically determined) average magnitude of acceleration a that vehicle seat 2 experiences because of the rear-end impact; this can be adjusted by way of the spring characteristic curve (thickness and material of torsion spring 6 a).
  • [0045]
    Visible in FIG. 3, as known per se, are holding rods 8 a, 8 b of headrest 8 that are provided for adjusting the vertical position, by means of which headrest 8 is mounted in seatback 2 at the height of the shoulder region of a seat user, tiltably about an axis X-X extending transversely to the vehicle axis (see H in FIG. 1 regarding the vertical location of axis X-X). For this purpose, an upper crossmember 5 a of seatback 2 that carries holding rods 8 a, 8 b is mounted pivotably (pivoting direction S) about axis X-X in which torsion spring 6 a lies, in respective upper attachment segments 4 a that project beyond lower back part 4 on two side members 4 b immovably joined to lower back part 4. Torsion spring 6 a itself is clamped laterally at its ends in attachment segments 4 a and immovably joined to crossmember 5 a approximately centeredly via a holding part 6 b. It can thus be preloaded in the normal use position (depicted exclusively in FIG. 4 and as one position in FIG. 5) by a pivoting movement opposite to the indicated pivoting direction S.
  • [0046]
    Provided as immobilization means 9 for retention of upper back part 5 in the normal use position is a lever system which is carried by two side walls (not further designated) of holding part 6 b (configured, in particular, as a pocket) and which acts as a positive or nonpositive lock.
  • [0047]
    In the embodiments depicted, as shown in more detail by FIG. 4 and in particular FIG. 5 as well, the lever system comprises two coacting levers 9 a, 9 b that are mounted pivotably in holding part 6 b. A first lever (pawl 9 a), in particular of one-armed configuration, is mounted laterally in bearings 9 c of holding part 6 b (in which context bearing axis Y-Y extends parallel to rotation axis X-X of upper back part 5), and braces pivotable crossmember 5 a, which is preloaded by torsion spring 6 a, against a stationary counterbearing 4 c. Counterbearing 4 c is located at the upper end of a support part 4 d that is immovably joined at the other end to lower back part 4 and projects into pocket-like holding part 6 b, and is constituted by a stop surface for a lobe 9 d of pawl 9 a arranged approximately at the unattached lever end. In a locked position of pawl 9 a, lobe 9 d rests against counterbearing 4 c.
  • [0048]
    The second lever (immobilization lever 9 b), in particular of two-armed configuration, serves to lock pawl 9 a in its locked position. It is mounted laterally in bearings 9 e of holding part 6 b (in which context bearing axis Z-Z once again extends parallel to rotation axis X-X of upper back part 5), and in its locked position engages with a locking lobe 9 f positively into pawl 9 a in such a way so that the latter cannot move out of its locked position. The depictions in FIGS. 4 and 5 each show the locked positions of pawl 9 a and immobilization lever 9 b.
  • [0049]
    If the requirement occurs (i.e. a rear-end impact), immobilization lever 9 b is pivoted about its bearing axis Z-Z (clockwise in the depictions of FIGS. 4 and 5), the positive engagement of locking lobe 9 f into pawl 9 a being nullified and pawl 9 a being released for a pivoting motion about its axis Y-Y (also clockwise in the depictions of FIGS. 4 and 5). Triggering of immobilization lever 9 b can be accomplished with a very small actuation force acting at one lever end 9 g, and advantageously is brought about by means of an electromagnet (not depicted) which receives its switching pulse from a sensor (constituting means 7 for detection of the rear-end impact).
  • [0050]
    Once pawl 9 a has been released by immobilization lever 9 b, it is pivoted (clockwise in accordance with the selected depiction), solely by the action of torsion spring 6 a, about its bearing axis Y-Y out of its locked position into its released position. In that context, the friction between the stationary stop surface of counterbearing 4 c and the support surface on lobe 9 d of pawl 9 a is overcome. Crossmember 4 a pivots with headrest 8 in the direction of the back of the vehicle occupant's head (interception position of headrest 8). The positions assumed in this context by upper back part 5 and headrest 8 are drawn with dot-dash lines in FIG. 1, as already mentioned, and are labeled in FIG. 5 (for the second preferred embodiment of the invention) with dot-dash reference lines.
  • [0051]
    Alternatively to the sensor embodiment, means 7 for detecting the rear-end impact could also be constituted by a mechanical control system that comprises mechanical parts which, accelerated by the action of the rear-end impact, bring immobilization lever 9 b out of engagement, i.e. into an unlocked position. This, too, corresponds to a direct effective connection U from means 7 for detecting the rear-end impact to immobilization means 9.
  • [0052]
    As shown in FIGS. 3 through 8, a variety of embodiments are possible as immobilization means 10 for retention of upper back part 5 against a backward motion of upper back part 5 out of the safety position into the normal use position, and of headrest 8 out of the interception position into the comfort position.
  • [0053]
    It has already been mentioned earlier that in order to suppress a spring-back or bounce-back effect upon activation of the protective device, said immobilization means 10 (recoil lock) are embodied in such a way that they allow immobilization not only in the normal use position and the safety position of upper back part 5, but also in positions located therebetween. As is clear from the various embodiments of the recoil lock described below, this can be achieved, for example, by means of self-locking rolling-element or wedge-type locks that operate positively and/or nonpositively (preferably by jamming), or by means of a ratchet device. For the embodiments of the recoil lock that are described it is advantageously possible, in the context of a suitable design of the recoil lock (size and number of rolling elements, slope of locking surfaces that become effective upon backward rotation, number and size of the teeth of a ratchet tooth set, etc.), to limit any recoil play of upper back part 5 (motion back opposite to pivot direction S toward the normal use position of back part 5) to a maximum angular magnitude of approximately 1 degree.
  • [0054]
    The embodiment according to FIGS. 3 and 4 shows an embodiment of immobilization means 10 for retention of upper back part 5, in particular crossmember 5 a, as a snap-locking ratchet mechanism. A carrier element 10 a for at least one, and in the embodiment depicted for two ratchet tooth sets 10 b, 10 c is attached within the pocket-shaped holding part 6 b. The respective tooth set 10 b, 10 c coacts with at least one, and in the embodiment depicted with two teeth 4 e, 4 f on support part 4 d, functioning as counterpart ratchet elements. The two tooth sets 10 b, 10 c and the corresponding counterpart teeth 4 e, 4 f, which are each offset from one another, result in greater security for the ratchet connection, and in a reduction (by half) in the recoil play of upper back part 5.
  • [0055]
    The embodiment as depicted in FIG. 5 shows a configuration of immobilization means 10 for retention of upper back part 5, in particular crossmember 5 a, as a rolling-element locking device. This rolling-element locking device comprises a ring gear 10 d, arranged concentrically about pivot axis X-X of upper back part 5, that is arranged inside a cylindrical shell 10 e; and rolling elements 10 g arranged between teeth 10 f of ring gear 10 d and between ring gear 10 d and shell 10 e. Torsion spring 6 a is immovably joined to ring gear 10 d. The tooth flanks of teeth 10 f of ring gear 10 d are embodied in such a way that the rolling-element locking device permits pivoting (pivoting direction S) into the safety position of upper back part 5 and into the interception position of headrest 8, since rolling elements 10 g can roll freely between ring gear 10 d and shell 10 e; whereas in the event of a motion in the opposite direction, jamming of rolling elements 10 g between ring gear 10 d and shell 10 e occurs and inhibits this backward motion.
  • [0056]
    A similar principle is also the basis of the embodiment of the recoil lock depicted in FIG. 6. This differs from the embodiment described above, however, in that rolling element or elements 10 g are each under the load of a spring 10 h, and that what comprises receptacles 10 k for rolling elements 10 g is not an inner part 10 i corresponding to ring gear 10 d and arranged concentrically about pivot axis X-X of upper back part 5, but rather a shell part 10 l corresponding to cylindrical shell 10 e. The manner of operation of this device corresponds to that described above. The walls of receptacles 10 k of shell part 10 l are embodied in such a way that the rolling-element locking device permits pivoting (pivoting direction S) into the safety position of upper back part 5 and into the interception position of headrest 8, since rolling elements 10 g can roll freely between inner part 10 i and shell part 10 l against the action of spring 10 h; whereas in the case of a motion in the opposite direction with the effect of spring 10 h additionally acting in that direction, jamming of rolling elements 10 g occurs and inhibits this backward motion.
  • [0057]
    The embodiment of recoil lock depicted in FIG. 7 differs from that shown in FIG. 6 in that jamming wedges 10 m are used instead of rolling elements 10 g.
  • [0058]
    In the embodiment of the recoil lock depicted in FIG. 8, as in the two previous embodiments, a cylindrical inner part 10 i having a smooth enveloping surface (or also one structured to increase friction, or equipped with a coating) is provided; but in the event of the backward motion described above, jamming is performed by means of at least one eccentrically mounted pivoting body 10 n engaging nonpositively on the enveloping surface of inner part 10 i.
  • [0059]
    As already mentioned, FIGS. 9 and 10 show two views of an upper part 5 of a further preferred embodiment of a seatback 2 according to the present invention. In this embodiment, the lever system of immobilization means 9 for retention A of upper back part 5 in the normal use position comprises a interlock lever 9 h, immovably joined to upper back part 5, in particular via a holder 11 to crossmember 5 a of back part 5, and to torque-generating device 6. In the embodiment shown, said lever is configured in particular as an angled lever pivotable about pivot axis X-X of upper back part 5, and is secured in a locked position (shown in FIGS. 9 and 10) by a locking bolt 9 i. For that purpose, in the locked position locking bolt 9 i engages through an opening 9 k in one angled limb of interlock lever 9 h, while the other angled limb is joined to torsion spring 6 a. In the event of a crash, locking bolt 9 i can be moved out of opening 9 k in order to release torque-generating device 6 (concretely, torsion spring 6 a).
  • [0060]
    Means 7 for detecting the rear-end impact are in effective connection U with immobilization means 9 for retention A of upper back part 5 in the normal use position (in the instance depicted, with locking bolt 9 i), and immobilization means 9 (concretely, locking bolt 9 i and interlock lever 9 h) are in effective connection B with torque-generating device 6 (torsion spring 6 a), in such a way that in the event of the impact, a release of torque-generating device 6 is initiated by immobilization means 9 pyrotechnically, i.e. preferably by means of a priming cartridge. Pyrotechnic device 12 serving this purpose can, as depicted, be arranged in holder 11 for locking bolt 9 i.
  • [0061]
    In addition, unlike in the embodiments depicted previously, in the embodiment depicted in FIGS. 9 and 10 a special recoil lock 13, by way of which interlock lever 9 h is joined to torsion spring 6 a, is provided. This recoil lock 13 serves as an assembly aid, and blocks any pivoting of upper back part 5 in direction S out of its normal use position into its safety position, but permits pivoting in the opposite direction. Recoil lock 13 can be embodied as a self-locking rolling-element or wedge-type lock that operates positively and/or nonpositively (preferably by jamming), or as a ratchet device, in such a way that it makes possible immobilization even in positions located between the safety position and the normal use position of upper back part 5. In detail, recoil lock 13 can be configured in the same way as immobilization means 10 (described above) for retention K of the upper back part against backward motion out of the safety position into the normal use position, except that it acts in the opposite direction. Recoil lock 13 can advantageously result in easier assembly, for example in that locking bolt 9 i is first inserted into opening 9 k of interlock lever 9 h, which for that purpose can preferably be configured as an elongated hole, and then torsion spring 6 a is tensioned (opposite to direction S) with a tool; in this context, recoil lock 13 permits this tensioning, but prevents any undesired springing back (relaxation) of torsion spring 6 a. Such relaxation of torsion spring 6 a is possible in the event of a crash, however, since after the removal of locking bolt 9 i, interlock lever 9 h that is held in place on torsion spring 6 a by the recoil lock can also be moved.
  • [0062]
    As is already evident from the description above, the invention is not limited to the exemplary embodiments depicted, but also encompasses all embodiments that are functionally identical for purposes of the invention. For example, the lever system could also be embodied in a manner different from that depicted and described, and arranged elsewhere. As regards the depictions in the drawings, FIGS. 6 through 8 are depicted partially schematically. With regard to further possible details of seatback 2 according to the present invention and a method implementable therewith for preventing accident-related injuries to a seat user, the reader is referred to German Patent Application 199 38 904.7 mentioned earlier, in its entirety.
  • [0063]
    The invention furthermore is also not limited to the combination of features defined in claim 1, but rather can also be defined by any other desired combination of specific features of all the individual features disclosed globally. This means that in principle practically any individual feature of claim 1 can be omitted and replaced with at least one individual feature disclosed elsewhere in the Application. Claim 1 is in this respect to be understood as merely a first attempt at stating an invention.

Claims (13)

  1. 1. A seatback for a vehicle seat, the seatback having an integrated protective device, comprising:
    a lower back part adapted to be joined to a seat part;
    an upper back part that is pivotable relative to the lower back part out of a normal use position, about an axis extending in the seatback transversely to a longitudinal vehicle axis, through an angular range in a pivoting direction pointing in a direction of vehicle travel, as a result of a torque acting in the pivoting direction, into a safety position;
    a device for generating the torque;
    means for detecting a rear-end impact; and
    immobilization means for retention of the upper back part in the normal use position;
    wherein the device for generating the torque comprises a force storage device or an energy storage device acting irrespective of any occupancy of the vehicle seat, the means for detecting a rear-end impact comprising a vehicle crash sensor and the immobilization means comprising a lever system, the vehicle crash sensor being in effective connection with the force storage device or the energy storage device, and with the lever system constituting the immobilization means for retention of the upper back part, such that in the event of the rear-end impact, the retention of the upper back part in the normal use position is nullified, the force storage device or the energy storage device is activated, and the upper back part is pivoted in the pivoting direction.
  2. 2. The seatback of claim 1, wherein there is attached in or on the upper back part a headrest which in the event of a rear-end impact is moved out of a comfort position, in which a spacing between the headrest and a seat user's head is approximately 40 to 110 mm, into an interception position, in which the spacing between the headrest and the seat user's head is zero or almost zero.
  3. 3. The seatback of claim 1, further comprising a second immobilization means for retention of the upper back part against a backward motion out of the safety position into the normal use position.
  4. 4. The seatback of claim 1, wherein the lever system of the immobilization means for retention of the upper back part in the normal use position comprises an interlock lever joined immovably to the upper back part, and to the torque-generating device, the interlock lever pivotable about the pivot axis of the upper back part, and secured in a locked position by a locking bolt.
  5. 5. The seatback of claim 4, wherein in the locked position, the locking bolt engages through an elongated opening of the interlock lever, out of which it is moved in order to release the torque-generating device.
  6. 6. The seatback of claim 4, wherein the torque-generating device is a torsion spring and wherein the interlock lever is joined to the torsion spring via a recoil lock that blocks any pivoting of the upper back part in the direction out of its normal use position into its safety position, but permits it in the opposite direction.
  7. 7. The seatback of claim 6, wherein the recoil lock is embodied as a self-locking rolling-element or wedge-type lock, operating positively or nonpositively, preferably by jamming, or as a ratchet device, in such a way that it makes possible immobilization even in positions located between the safety position and the normal use position of the upper back part.
  8. 8. The seatback of claim 3, wherein the second immobilization means is respectively embodied as a self-locking rolling-element or wedge-type lock that operates positively and/or nonpositively, or as a ratchet device, the second immobilization means making possible immobilization against a backward motion even in positions located between the safety position and the normal use position of the upper back part.
  9. 9. The seatback of claim 3, wherein the second immobilization means is configured as a rolling-element locking device comprising a ring gear, arranged concentrically about the pivot axis of the upper back part, that is arranged inside a cylindrical shell, as well as rolling elements arranged between the teeth of the ring gear and between the ring gear and the shell.
  10. 10. The seatback of claim 3, wherein the second immobilization means is configured as a recoil lock that comprises a cylindrical inner part, arranged concentrically about the pivot axis of the upper back part, that is arranged within a shell part, as well as rolling elements or jamming wedges arranged in receptacles of the shell part.
  11. 11. The seatback of claim 3, wherein the second immobilization means is configured as a recoil lock that comprises a cylindrical inner part having a smooth enveloping surface or one structured to increase friction or equipped with a coating, and an eccentrically mounted pivoting body engaging nonpositively on the enveloping surface of the inner part.
  12. 12. The seatback of claim 3, wherein the second immobilization means is configured in such a way that the second immobilization means limits any recoil play of the upper back part to a maximum angular magnitude of one degree.
  13. 13. The seatback of claim 1, wherein the means for detecting a rear-end impact are in effective connection with the immobilization means for retention of the upper back part in the normal use position, and the immobilization means are in effective connection with the torque-generating device, in such a way that in the event of the impact, a release of the torque-generating device is accomplished by the immobilization means by means of a pyrotechnic device.
US10945788 1999-08-17 2004-09-21 Seat back for a vehicle seat comprising an integrated protective device Abandoned US20050035642A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19938904.7 1999-08-17
DE1999138904 DE19938904A1 (en) 1999-08-17 1999-08-17 Vehicle seat backrest with integrated protective device and method for preventing accidental injury
US10049698 US6802562B1 (en) 1999-08-17 2000-08-16 Seat back for a vehicle seat comprising an integrated protective device
US10945788 US20050035642A1 (en) 1999-08-17 2004-09-21 Seat back for a vehicle seat comprising an integrated protective device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10945788 US20050035642A1 (en) 1999-08-17 2004-09-21 Seat back for a vehicle seat comprising an integrated protective device

Publications (1)

Publication Number Publication Date
US20050035642A1 true true US20050035642A1 (en) 2005-02-17

Family

ID=7918627

Family Applications (3)

Application Number Title Priority Date Filing Date
US10049698 Expired - Fee Related US6802562B1 (en) 1999-08-17 2000-08-16 Seat back for a vehicle seat comprising an integrated protective device
US09640427 Expired - Fee Related US6478373B1 (en) 1999-08-17 2000-08-17 Automotive seat—seat back with integrated protective device and process to prevent injuries caused by accident
US10945788 Abandoned US20050035642A1 (en) 1999-08-17 2004-09-21 Seat back for a vehicle seat comprising an integrated protective device

Family Applications Before (2)

Application Number Title Priority Date Filing Date
US10049698 Expired - Fee Related US6802562B1 (en) 1999-08-17 2000-08-16 Seat back for a vehicle seat comprising an integrated protective device
US09640427 Expired - Fee Related US6478373B1 (en) 1999-08-17 2000-08-17 Automotive seat—seat back with integrated protective device and process to prevent injuries caused by accident

Country Status (3)

Country Link
US (3) US6802562B1 (en)
EP (1) EP1077155B1 (en)
DE (1) DE19938904A1 (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050242640A1 (en) * 2004-04-15 2005-11-03 Barko Jerry S Folding headrest assembly
US20070152487A1 (en) * 2004-04-15 2007-07-05 Windsor Machine & Stamping Ltd. Foldable Headrest Assembly
US20080290714A1 (en) * 2007-05-23 2008-11-27 Airbus Seat with a pivoting headrest
US20100004826A1 (en) * 2008-07-07 2010-01-07 Martin Ostling Connecting device arranged in a motor vehicle and a method for controlling the same
US20100102605A1 (en) * 2007-07-05 2010-04-29 Aisin Seiki Kabushiki Kaisha Vehicle seat device
CN101844527A (en) * 2009-03-27 2010-09-29 爱信精机株式会社 Seat apparatus and seat adjustment mechanism for the same
US9649962B2 (en) 2013-01-24 2017-05-16 Ford Global Technologies, Llc Independent cushion extension and thigh support
US9707870B2 (en) 2013-01-24 2017-07-18 Ford Global Technologies, Llc Flexible seatback system
US9707873B2 (en) 2013-01-24 2017-07-18 Ford Global Technologies, Llc Flexible seatback system
US9802512B1 (en) 2016-04-12 2017-10-31 Ford Global Technologies, Llc Torsion spring bushing
US9834166B1 (en) 2016-06-07 2017-12-05 Ford Global Technologies, Llc Side airbag energy management system
US9845029B1 (en) 2016-06-06 2017-12-19 Ford Global Technologies, Llc Passive conformal seat with hybrid air/liquid cells
US9849856B1 (en) 2016-06-07 2017-12-26 Ford Global Technologies, Llc Side airbag energy management system
US9849817B2 (en) 2016-03-16 2017-12-26 Ford Global Technologies, Llc Composite seat structure
US9889773B2 (en) 2016-04-04 2018-02-13 Ford Global Technologies, Llc Anthropomorphic upper seatback
US9914378B1 (en) 2016-12-16 2018-03-13 Ford Global Technologies, Llc Decorative and functional upper seatback closeout assembly
US9994135B2 (en) 2016-03-30 2018-06-12 Ford Global Technologies, Llc Independent cushion thigh support

Families Citing this family (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7604080B2 (en) 1997-12-17 2009-10-20 Automotive Technologies International, Inc. Rear impact occupant protection apparatus and method
US6746078B2 (en) * 1997-12-17 2004-06-08 Automotive Technologies International, Inc. System and method for moving a headrest based on anticipatory sensing
DE19938904A1 (en) * 1999-08-17 2001-03-08 Johnson Controls Gmbh Vehicle seat backrest with integrated protective device and method for preventing accidental injury
DE10206894B4 (en) * 2001-02-19 2006-09-14 Lear Corp., Southfield Active head restraint for a vehicle seat
DE20107765U1 (en) * 2001-05-08 2002-09-19 Johnson Controls Gmbh Guard against accidental injury to a user of a vehicle seat and mechanical system for detecting a vehicle crash
FR2824799B1 (en) 2001-05-17 2004-10-29 Faurecia Sieges Automobile Siege of vehicle acquires a neck protection device in case of accident
JP2003080985A (en) * 2001-06-26 2003-03-19 Nhk Spring Co Ltd Automotive seat device
US6655733B2 (en) * 2001-06-29 2003-12-02 Lear Corporation Variable movement headrest arrangement
US6631955B2 (en) * 2001-06-29 2003-10-14 Lear Corporation Variable movement headrest arrangement
US6631949B2 (en) * 2001-06-29 2003-10-14 Lear Corporation Variable movement headrest arrangement
GB2377370B (en) * 2001-07-10 2005-03-23 Autoliv Dev Improvements in or relating to a head-rest arrangement
DE10137684B4 (en) * 2001-08-01 2005-06-23 Faurecia Autositze Gmbh & Co. Kg Backrest with active headrest
DE20114944U1 (en) * 2001-09-10 2003-01-30 Johnson Controls Gmbh Backrest for vehicle seat
US7134717B2 (en) 2001-09-10 2006-11-14 Johnson Controls Gmbh Backrest for a vehicle seat
DE10215054B4 (en) * 2002-04-05 2007-01-18 Keiper Gmbh & Co.Kg Headrest for a vehicle seat
JP4133059B2 (en) * 2002-07-18 2008-08-13 日本発条株式会社 Vehicle seat having a forward movable headrest
WO2004056606A1 (en) * 2002-12-21 2004-07-08 Keiper Gmbh & Co. Kg Crash-active head rest
US6840560B2 (en) * 2003-02-18 2005-01-11 Ford Global Technologies, Llc Vehicular seat assembly having a movable headrest and a vehicle which incorporates the vehicular seat assembly
DE10318417B4 (en) * 2003-04-23 2006-04-13 Faurecia Autositze Gmbh & Co. Kg Verstellandordnung to pre-crash adjustment of a vehicle component, in particular a vehicle seat
DE10321871A1 (en) * 2003-05-15 2004-12-02 Robert Bosch Gmbh Occupant protection system for vehicles and method for operating an occupant protection system for vehicles
GB2402057B (en) * 2003-05-29 2006-02-15 Autoliv Dev Improvements in or relating to a head-rest arrangement
DE10325472A1 (en) * 2003-06-05 2004-12-30 Keiper Gmbh & Co. Kg Crash-active headrests
GB2403137B (en) 2003-06-24 2006-03-08 Autoliv Dev Improvements in or relating to a vehicle seat
US7052089B2 (en) * 2003-10-14 2006-05-30 Lane Furniture Industries, Inc. Multi-position headrest and mechanism therefor
JP4647331B2 (en) * 2004-03-23 2011-03-09 マツダ株式会社 Seat headrest with vehicle
US7104602B2 (en) * 2004-06-30 2006-09-12 Lear Corporation Vehicle seat having a moveable head restraint
DE102004035582B3 (en) * 2004-07-22 2006-02-02 Keiper Gmbh & Co.Kg Crash-active headrests
US7188894B2 (en) * 2004-07-28 2007-03-13 Lear Corporation Trigger mechanism for impact response devices in a seat
US7159934B2 (en) * 2004-10-01 2007-01-09 Lear Corporation Vehicle seat and head restraint assembly
US7185950B2 (en) 2004-12-28 2007-03-06 Fisher Dynamics Corporation Head restraint system
GB2424363B (en) * 2005-03-24 2008-07-16 Autoliv Dev Active headrest with lock mechanism
US8152242B2 (en) * 2005-04-04 2012-04-10 Lear Corporation Selective remote head restraint actuation
GB0513278D0 (en) 2005-07-01 2005-08-03 Delphi Tech Inc Head restraint system
WO2007003267A3 (en) * 2005-07-01 2007-03-15 Delphi Tech Inc Triggering device
JPWO2007034895A1 (en) * 2005-09-21 2009-03-26 テイ・エス テック株式会社 Inspection apparatus of the headrest return prevention mechanism
DE102005051423B3 (en) * 2005-10-27 2007-03-08 Keiper Gmbh & Co.Kg Head-restraint for a motor vehicle has an impact element to be extended in a crash by means of an electric drive mechanism
US7322646B2 (en) * 2005-11-02 2008-01-29 Lear Corporation Folding head restraint mechanism
US20070164593A1 (en) * 2006-01-17 2007-07-19 Windsor Machine & Stamping Limited Articulating headrest assembly
US7422280B2 (en) * 2006-04-07 2008-09-09 Windsor Machine & Stamping Limited Foldable headrest assembly
US7611210B2 (en) * 2006-08-21 2009-11-03 Kennametal Inc. Cutting bit body and method for making the same
US7845721B2 (en) * 2007-02-14 2010-12-07 Inoac Corporation Headrest
JP4306751B2 (en) * 2007-03-15 2009-08-05 トヨタ自動車株式会社 Headrest controller and an active headrest
US7445284B2 (en) * 2007-04-05 2008-11-04 Gerfast Sten R In-expensive head and upper torso restraint with u-shaped air bag
JP4358255B2 (en) * 2007-04-20 2009-11-04 トヨタ紡織株式会社 Vehicle seat
US7992933B2 (en) * 2007-06-21 2011-08-09 Lear Corporation Integrated vehicle seat with active head restraint system
US7798570B2 (en) * 2007-07-05 2010-09-21 E & E Manufacturing Company, Inc. Adjustable headrest for a vehicle seat
US20090071283A1 (en) * 2007-09-18 2009-03-19 Lear Corporation Selective remote head restraint actuation
FR2921023B1 (en) * 2007-09-18 2009-03-20 Peugeot Citroen Automobiles Sa motor vehicle seat of record for reinforcement
US8506012B2 (en) * 2007-12-12 2013-08-13 Ts Tech Co., Ltd. Center-foldable seat back, seat with the same, and method of manufacturing center-foldable seat back
US8100472B2 (en) * 2008-03-17 2012-01-24 Lear Corporation Vehicle active head restraint system with a locking linkage
US8408639B2 (en) * 2008-03-31 2013-04-02 Honda Motor Co., Ltd. Vehicle seat
US8205941B2 (en) 2008-07-30 2012-06-26 Trw Vehicle Safety Systems Inc. Active head restraint for a vehicle seat
DE102008057792B4 (en) * 2008-11-17 2013-08-14 Johnson Controls Gmbh Crash-active headrest having a locking push button
DE102010023403B4 (en) * 2010-06-11 2012-09-27 Johnson Controls Gmbh Headrest, in particular for a motor vehicle
US20130292960A1 (en) * 2012-05-03 2013-11-07 Volodymyr Shyshkin Anti-theft device fitted to the seat of the vehicle
US9132756B1 (en) * 2013-03-14 2015-09-15 Gill Industries, Inc. Head restraint assemblies
DE102013015500A1 (en) * 2013-07-11 2015-01-15 Johnson Controls Gmbh VERSTELLVORRlCHTUNG MlT ElNEM FIXED ELEMENT, ElNEM ADJUSTABLE ELEMENT AND Elner FIRST AND arresting a wrap
GB201408646D0 (en) * 2014-05-15 2014-07-02 Daimler Ag Seat for a vehicle, in particular a passenger vehicle
US9156334B1 (en) * 2014-06-30 2015-10-13 Nissan North America, Inc. Vehicle body structure
US20170355288A1 (en) * 2016-06-10 2017-12-14 Ford Global Technologies, Llc Vehicle seatback

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2973029A (en) * 1958-06-16 1961-02-28 Clifford F Schlosstein Passenger safety equipment for automobile
US5694320A (en) * 1995-06-07 1997-12-02 Automotive Technologies Intl, Inc. Rear impact occupant protection apparatus
US5795019A (en) * 1996-10-09 1998-08-18 Delphi Automotive Ssystems Deutschland Gmbh Vehicle seat and headrest arrangement
US5822707A (en) * 1992-05-05 1998-10-13 Automotive Technologies International, Inc. Automatic vehicle seat adjuster
US5823619A (en) * 1996-03-04 1998-10-20 Trw Occupant Restraint Systems Gmbh Vehicle seat
US5833312A (en) * 1994-08-30 1998-11-10 Ltg Safecontrol Automotive Ab Apparatus for counteracting whiplash injuries
US5882071A (en) * 1996-08-28 1999-03-16 Trw Occupant Restraint Systems Gmbh Vehicle seat with headrest adjustable on the backrest
US5927804A (en) * 1998-02-11 1999-07-27 Trw Inc. Vehicle occupant protection apparatus
US5934750A (en) * 1996-02-26 1999-08-10 Trw Occupant Restraint Systems Gmbh Vehicle seat
US6019424A (en) * 1997-12-03 2000-02-01 Ewald Witte Gmbh & Co. Kg Headrest, in particular in motor vehicles
US6033018A (en) * 1996-01-29 2000-03-07 Trw Occupant Restraint Systems Gmbh Vehicle seat
US6045181A (en) * 1998-03-18 2000-04-04 Ikeda Bussan Co., Ltd. Adjustable headrest
US6082817A (en) * 1997-02-27 2000-07-04 Inova Gmbh Technische Entwicklungen Motor vehicle seat
US6158812A (en) * 1995-03-13 2000-12-12 Bonke; Christoph Individually adaptable headrest for seats with backs
US6273511B1 (en) * 1998-06-22 2001-08-14 Lear Corporation Seat and headrest arrangement for a vehicle
US6478373B1 (en) * 1999-08-17 2002-11-12 Johnson Controls Technology Company Automotive seat—seat back with integrated protective device and process to prevent injuries caused by accident

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2232726A1 (en) * 1972-07-04 1974-01-24 Volkswagenwerk Ag safety device
DE3131633A1 (en) * 1981-08-10 1983-02-24 Hammerstein Gmbh C Rob Head rest (head restraint) device
JP3077196B2 (en) * 1990-11-29 2000-08-14 日産自動車株式会社 Seat
JPH08187139A (en) * 1995-01-06 1996-07-23 Nec Home Electron Ltd On-board headrest device
DE19738201C2 (en) * 1996-10-16 2002-06-27 Grammer Ag Vehicle seat with headrest
JP2000062557A (en) 1998-08-20 2000-02-29 Honda Motor Co Ltd Passenger protecting device
US6196579B1 (en) 1998-09-24 2001-03-06 Trw Vehicle Safety Systems Inc. Rear impact occupant protection system
WO2001012465A1 (en) 1999-08-17 2001-02-22 Johnson Controls Gmbh Seat back for a vehicle seat comprising an integrated protective device

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2973029A (en) * 1958-06-16 1961-02-28 Clifford F Schlosstein Passenger safety equipment for automobile
US5822707A (en) * 1992-05-05 1998-10-13 Automotive Technologies International, Inc. Automatic vehicle seat adjuster
US5833312A (en) * 1994-08-30 1998-11-10 Ltg Safecontrol Automotive Ab Apparatus for counteracting whiplash injuries
US6158812A (en) * 1995-03-13 2000-12-12 Bonke; Christoph Individually adaptable headrest for seats with backs
US5694320A (en) * 1995-06-07 1997-12-02 Automotive Technologies Intl, Inc. Rear impact occupant protection apparatus
US6033018A (en) * 1996-01-29 2000-03-07 Trw Occupant Restraint Systems Gmbh Vehicle seat
US5934750A (en) * 1996-02-26 1999-08-10 Trw Occupant Restraint Systems Gmbh Vehicle seat
US5823619A (en) * 1996-03-04 1998-10-20 Trw Occupant Restraint Systems Gmbh Vehicle seat
US5882071A (en) * 1996-08-28 1999-03-16 Trw Occupant Restraint Systems Gmbh Vehicle seat with headrest adjustable on the backrest
US5795019A (en) * 1996-10-09 1998-08-18 Delphi Automotive Ssystems Deutschland Gmbh Vehicle seat and headrest arrangement
US6082817A (en) * 1997-02-27 2000-07-04 Inova Gmbh Technische Entwicklungen Motor vehicle seat
US6019424A (en) * 1997-12-03 2000-02-01 Ewald Witte Gmbh & Co. Kg Headrest, in particular in motor vehicles
US5927804A (en) * 1998-02-11 1999-07-27 Trw Inc. Vehicle occupant protection apparatus
US6045181A (en) * 1998-03-18 2000-04-04 Ikeda Bussan Co., Ltd. Adjustable headrest
US6273511B1 (en) * 1998-06-22 2001-08-14 Lear Corporation Seat and headrest arrangement for a vehicle
US6478373B1 (en) * 1999-08-17 2002-11-12 Johnson Controls Technology Company Automotive seat—seat back with integrated protective device and process to prevent injuries caused by accident
US6802562B1 (en) * 1999-08-17 2004-10-12 Johnson Controls Technology Company Seat back for a vehicle seat comprising an integrated protective device

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050242640A1 (en) * 2004-04-15 2005-11-03 Barko Jerry S Folding headrest assembly
US20070152487A1 (en) * 2004-04-15 2007-07-05 Windsor Machine & Stamping Ltd. Foldable Headrest Assembly
US7325877B2 (en) 2004-04-15 2008-02-05 Windsor Machine & Stamping Limited Foldable headrest assembly
US20080290714A1 (en) * 2007-05-23 2008-11-27 Airbus Seat with a pivoting headrest
US7681954B2 (en) * 2007-05-23 2010-03-23 Airbus Seat with a pivoting headrest
US20100102605A1 (en) * 2007-07-05 2010-04-29 Aisin Seiki Kabushiki Kaisha Vehicle seat device
US7845729B2 (en) * 2007-07-05 2010-12-07 Aisin Seiki Kabushiki Kaisha Vehicle seat device
US20100004826A1 (en) * 2008-07-07 2010-01-07 Martin Ostling Connecting device arranged in a motor vehicle and a method for controlling the same
US8532881B2 (en) * 2008-07-07 2013-09-10 Autoliv Development Ab Connecting device arranged in a motor vehicle and a method for controlling the same
CN101844527A (en) * 2009-03-27 2010-09-29 爱信精机株式会社 Seat apparatus and seat adjustment mechanism for the same
US20100244525A1 (en) * 2009-03-27 2010-09-30 Aisin Seiki Kabushiki Kaisha Seat apparatus and seat adjustment mechanism for the same
US8262164B2 (en) * 2009-03-27 2012-09-11 Aisin Seiki Kabushiki Kaisha Seat apparatus and seat adjustment mechanism for the same
US9873360B2 (en) 2013-01-24 2018-01-23 Ford Global Technologies, Llc Flexible seatback system
US9707870B2 (en) 2013-01-24 2017-07-18 Ford Global Technologies, Llc Flexible seatback system
US9707873B2 (en) 2013-01-24 2017-07-18 Ford Global Technologies, Llc Flexible seatback system
US9873362B2 (en) 2013-01-24 2018-01-23 Ford Global Technologies, Llc Flexible seatback system
US9649962B2 (en) 2013-01-24 2017-05-16 Ford Global Technologies, Llc Independent cushion extension and thigh support
US9849817B2 (en) 2016-03-16 2017-12-26 Ford Global Technologies, Llc Composite seat structure
US9994135B2 (en) 2016-03-30 2018-06-12 Ford Global Technologies, Llc Independent cushion thigh support
US9889773B2 (en) 2016-04-04 2018-02-13 Ford Global Technologies, Llc Anthropomorphic upper seatback
US9802512B1 (en) 2016-04-12 2017-10-31 Ford Global Technologies, Llc Torsion spring bushing
US9845029B1 (en) 2016-06-06 2017-12-19 Ford Global Technologies, Llc Passive conformal seat with hybrid air/liquid cells
US9834166B1 (en) 2016-06-07 2017-12-05 Ford Global Technologies, Llc Side airbag energy management system
US9849856B1 (en) 2016-06-07 2017-12-26 Ford Global Technologies, Llc Side airbag energy management system
US9914378B1 (en) 2016-12-16 2018-03-13 Ford Global Technologies, Llc Decorative and functional upper seatback closeout assembly

Also Published As

Publication number Publication date Type
EP1077155A1 (en) 2001-02-21 application
US6802562B1 (en) 2004-10-12 grant
US6478373B1 (en) 2002-11-12 grant
DE19938904A1 (en) 2001-03-08 application
EP1077155B1 (en) 2003-08-27 grant

Similar Documents

Publication Publication Date Title
US3357736A (en) Vehicle seat
US6029993A (en) Side airbag device, method for operation thereof and vehicle seat therewith
US5799893A (en) Multi-level load limiting torsion bar retractor
US6164720A (en) Seat back support mechanism
US5364129A (en) Vehicle safety belt tensioning mechanism
US5026119A (en) Back support for motorcycles
US6328383B2 (en) Pivot mechanism for a vehicle seat and seat fitted with said mechanism
US6241172B1 (en) Belt retractor with adjustable force-limiting device
US3901100A (en) Adjusting device for the reclining seat of automotive vehicles
US3724603A (en) Collision force absorption device
US6186574B1 (en) Vehicle occupant protection system
US6209955B1 (en) Vehicle seat with a yielding recliner stop
US3762505A (en) Device for reducing severity of impact forces
US6296278B1 (en) Rollover protection apparatus
US6450573B1 (en) Anti-submarine vehicle seat device
US3310342A (en) Anti-whiplash device
US6702385B2 (en) Head restraint pivot latch
US5746467A (en) Automatic safety car seat using tension springs
US6123388A (en) Restraint system for a school bus seat
US20100320816A1 (en) Vehicle seat with lumbar support
US5836648A (en) Vehicle seat with multifunction backrest
US6485098B1 (en) Restraint system for a school bus seat
US5967604A (en) Vehicle seat apparatus
US5556159A (en) Devices for locking the adjustable components of vehicle seats in position in the event of a shock
US6394535B1 (en) Vehicle occupant protection system

Legal Events

Date Code Title Description
AS Assignment

Owner name: JOHNSON CONTROLS TECHNOLGY COMPANY, MICHIGAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAKE, ERNST-JURGEN;MULLER, HANS-JOACHIM;SCHMALE, GERHARD;AND OTHERS;REEL/FRAME:015823/0152

Effective date: 20020611