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
  • B60N2/888—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 with the features of the preamble of An ⁇ award 1.
• a headrest of this type in which the baffle element extends by means of a parallelogram four-bar linkage in the event of a crash, wherein the drive is a spring-loaded, the baffle beauf ⁇ striking swivel arm, which locks in the crash position.
• the invention is based on the object to improve a headrest of the type mentioned genann ⁇ th. This object is achieved by a headrest with the features of claim 1.
• Advantageous embodiments are the subject of the dependent claims.
• the leg of the spring forms one of the rockers reduces the number of components required, which reduces the manufacturing costs and simplifies assembly.
• the functionality of the crash-active headrest remains unaffected.
• the arrangement of the leg substantially corresponds to that of a rocker, ie preferably, the leg is radially from the associated axis of the carrier.
• the spring is partially wound on this axis or forms the axis itself by the spring is fixed in the carrier, while the connection to the baffle element, for example by means of a crank, shoulder or the like, which then partially parallel to the axis.
• the locking of the starting position for example, by means of a Tail tongue, bend or the like, which is supported by a pawl of the wearer.
• the spring is preferably formed integrally from a continuous spring steel wire and constructed symmetrically to the center of the headrest defined by a vertical plane to achieve a symmetrical drive.
• the leg serving as a rocker is then preferably provided twice and provided, for example, in a middle section of the spring, where also the bend (s) and the catch tongue preferably located between the legs can be provided.
• the leg or legs preferably form an upper rocker, in which case a total of two four-bar joints each consisting of a leg, a lower rocker and the impact element and the carrier are provided.
• Fig. 1 is a side view of the embodiment in the starting position
• Fig. 2 is a view corresponding to FIG. 1 in the crash position.
• a headrest 1 is provided for a vehicle seat of a motor vehicle.
• the headrest 1 is adjustable in height by means of two parallel headrest rods 3, which are slidably mounted in the backrest of the vehicle seat.
• the arrangement of the headrest 1 on the vehicle seat and the ge usual direction of travel of the motor vehicle define the whils ⁇ used.
• the headrest rods 3 are inserted with their upper end firmly in a transverse to the headrest rods 3 arranged carrier 5.
• At the upper end of Trä ⁇ gers 5 is a horizontally disposed, extending transversely to the headrest rods 3 axis 7 defined in the carrier 5, which in the present case is only mathematically available, but may be physically present in a modified version.
• the Kopf ⁇ support 1 is constructed substantially symmetrically to a vertical center plane.
• a baffle element 13 is arranged.
• An upholstered part is arranged on the impact element 13, wherein the impact element 13 can at the same time be the cushion support, ie the upholstery can be fixed directly on the impact element 13.
• a pair of lower wings 15 of elongated shape are articulated on the one hand in each case by means of a horizontal, parallel to the axis 7 rocker bearing bolt 17 on the carrier 5 and on the other hand at the lower end of the impact member 13.
• the double leg spring 21 is supported, each with an end portion 22 on a metallic, cylindrical cross bar 23, which is mounted parallel to the axis 7 in the carrier 5.
• a metallic, cylindrical cross bar 23 which is mounted parallel to the axis 7 in the carrier 5.
• the outer ends of the two Wickelungsab ⁇ sections are connected to a common, U-shaped bracket portion, by means of which the double leg spring 21, the impact element 13 acts.
• the Bügelab ⁇ section consists of two radially projecting from the axis 7, the outer ends of the double leg spring 21 forming legs 25, depending on a substantially parallel to the axis 7 to the center of the headrest 1 extending bend 27, to which the baffle element 13 is attached, and in the middle of a catch tongue 29.
• the carrier 5, je ⁇ one leg 25, the baffle element 13 and the respective lower rocker 15 each form a four-bar linkage 31st
• the double leg spring 21 is held in the starting position by a pawl 33, which receives the catch tongue 29 with its pawl mouth. In a projection on the median plane, the catch tongue 29 extends approximately perpendicular to the legs 25.
• the pawl 33 is pivotally mounted on the crossbar 23, biased by means of a relation to the double leg spring 21 weak spring relative to the carrier 5 in ⁇ réellesrich ⁇ direction and is in turn by a not shown Hebelme ⁇ mechanism and ultimately held by a magnet system.
• an electromagnet of the magnet system receives a pulse and releases the lever mechanism, which releases the pawl 33.
• the relaxing double leg spring 21 can push the impact element 13 forward and at the same time open the pawl 33.
• the crash-active headrest 1 is triggered. Extending the four joints 29, the impact element 13 jumps forward into a crash position.
• the crash-active headrest can be reset after a crash, ie reversibly brought into the starting position.
• a crash ie reversibly brought into the starting position.
• it is introduced into the carrier 5 by a tool, which is not shown in more detail, and the lever mechanism is returned.
• the baffle element 13 can now be moved against the force of the exciting double leg spring 25 back to the receptive latch 33 back.
• the tongue 29 comes into contact with the pawl 33, the latter is rotated to its initial position and held there.
• the lever mechanism zu ⁇ reset first the impact element 13 is pushed back and then the lever mechanism zu ⁇ reset.

Landscapes

• Engineering & Computer Science (AREA)
• Aviation & Aerospace Engineering (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Seats For Vehicles (AREA)
• Chair Legs, Seat Parts, And Backrests (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=34972700

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (18)

Citations (4)

Family Cites Families (40)

• 2004
  • 2004-07-22 DE DE102004035582A patent/DE102004035582B3/de not_active Expired - Fee Related
• 2005
  • 2005-06-07 JP JP2007521812A patent/JP4667458B2/ja not_active Expired - Fee Related
  • 2005-06-07 DE DE502005011126T patent/DE502005011126D1/de not_active Expired - Lifetime
  • 2005-06-07 PL PL05761934T patent/PL1768871T3/pl unknown
  • 2005-06-07 EP EP05761934A patent/EP1768871B1/de not_active Expired - Lifetime
  • 2005-06-07 WO PCT/EP2005/006086 patent/WO2006010405A1/de not_active Ceased
• 2007
  • 2007-01-19 US US11/655,949 patent/US7344191B2/en not_active Expired - Lifetime

Patent Citations (4)

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