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
  • B60N2/809—Head-rests movable or adjustable vertically slidable
  • B60N2/812—Head-rests movable or adjustable vertically slidable characterised by their locking devices
  • B60N2/815—Release mechanisms, e.g. buttons
• • 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
  • B60N2/865—Head-rests movable or adjustable providing a fore-and-aft movement with respect to the occupant's head

Definitions

• the invention relates to a motor vehicle seat headrest.
• a common crosspiece for unlocking said devices said crosspiece being mounted in transverse sliding on said main body, said crosspiece having an end part cooperating with a push button, mounted in transverse sliding on said secondary body, allowing its actuation in unlocking, so as to to release the sliding of said main and secondary body,
• the button it is known to press the button against the end part of the crosspiece, the actuation of said button under pressure making it possible to slide said crosspiece towards its unlocking position. And, depending on the adjustment position chosen for the secondary body, the button can adopt a plurality of longitudinal positions relative to the crosspiece.
• the invention aims to overcome this drawback.
• the invention proposes a motor vehicle seat headrest, said headrest comprising:
• a common crosspiece for unlocking said devices said crosspiece being mounted in transverse sliding on said main body, said crosspiece having an end part cooperating with a push button, mounted in transverse sliding on said secondary body, allowing its actuation in unlocking, so as to to release the sliding of said main and secondary body,
• said headrest further comprising:
• a force balancing part interposed between said button and said crosspiece, said part extending longitudinally, said part having an external face on which said button rests and an internal face in the form of a track extending longitudinally, said track supporting a projection, located on said end part, in a plurality of positions defined by the longitudinal adjustment position of said secondary body,
• FIG.1 is a schematic partial perspective view of a headrest according to one embodiment
• FIG.2 is a schematic exploded partial perspective view of the headrest of Figure 1
• FIG.3 is a schematic detail view in partial perspective of the headrest of the previous figures.
• FIG.4 is a schematic view in horizontal section of the headrest of the previous figures, the secondary body being in the intermediate adjustment position and the crosspiece not being activated in unlocking,
• FIG.5a] and FIG.5b] are schematic views in horizontal section of the headrest of the previous figures, the secondary body being in two extreme adjustment positions and the crosspiece being actuated in unlocking,
• FIG.6 is a schematic partial perspective view of the headrest of the previous figures provided with a secondary body locking device according to one embodiment.
• a headrest 1 of a motor vehicle seat comprising:
• a secondary body 4 of molded plastic material mounted in longitudinal sliding on said main body, so that said secondary body can adopt a plurality of longitudinal adjustment positions, said secondary body being provided with a support wall 17 of the head of an occupant of said seat,
• a common crosspiece 5 for unlocking said devices said crosspiece being mounted in transverse sliding on said main body, said crosspiece having an end part 6 cooperating with a push button 7, mounted in transverse sliding on said secondary body, allowing its unlocking actuation , so as to release the sliding of said main and secondary body,
• said headrest further comprising: • a force balancing part 9 interposed between said button and said crosspiece, said part extending longitudinally, said part having an external face 10 on which said button rests and an internal face 11 in the form of a track extending longitudinally, said track receiving in support a projection 12, located on said end part, in a plurality of positions defined by the longitudinal adjustment position of said secondary body,
• the return spring 8 is in the form of an elastically compressible foam washer, said washer interposing between the secondary body 4 and the button 7.
• the return spring 8 is based on spring metal.
• the straightening springs 13 are in the form of blocks of elastically compressible foam.
• the straightening springs 13 are based on spring metal.
• the end part 6 is in the general shape of a U, a first branch 14 of the U being an extension of the rest of the crosspiece 5 and the second branch 15 of the U sliding in a guide means 16 provided in the secondary body 4.
• the projection 12 is located in the middle part of the U. According to the embodiment shown, the projection 12 has a convex shape, so as to limit the contact surface between the crosspiece 5 and the balancing piece 9, and thus to limit the friction between the two during adjustment of the secondary body 4.
• the secondary body 4 is mounted on the main body 3 by two tenons 23 arranged at its periphery, said tenons having in longitudinal view a shape fitting into a trapezoid having a large base facing inwards and a small base facing outwards, said tenons sliding in two respective mortises 24 of complementary shape, opening through said small base towards the outside, provided in said main body, so as to form “dovetail” type fixings .
• the locking device of the main body 3 comprises:
• At least one locking projection 19 mounted movably relative to the main body 3 - said projection here being formed by a zone of a deformable spring metal wire - between a locking position, where said projection is inserted into one of said notches (see Figure 4), and an unlocking position, where said projection withdraws from said notch (see Figures 5) - here by bending of said wire during actuation of the crosspiece 5 in unlocking - in order to release the sliding of said main body.
• the locking device of the secondary body 4, in the chosen adjustment position comprises:
• the locking device of the secondary body 4 comprises two latches 21 each cooperating with a respective rack 20, in order to ensure reinforced locking.
• the racks 20 are arranged on the tenons 23.
• the secondary body 4 can be molded in one piece with the support wall 17 or constitute a separate part which is mounted on said wall.

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)

Applications Claiming Priority (2)

Publications (1)

Family

ID=84362158

Family Applications (1)

Country Status (3)

Family Cites Families (4)

• 2022
  • 2022-07-07 FR FR2206990A patent/FR3137625B1/fr active Active
• 2023
  • 2023-07-07 WO PCT/EP2023/068813 patent/WO2024008908A1/fr not_active Ceased
  • 2023-07-07 EP EP23740995.8A patent/EP4551432A1/de active Pending

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