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
  • B60N2/818—Head-rests movable or adjustable vertically slidable characterised by their locking devices with stepwise positioning
• • 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
  • B60N2/894—Head-rests with rods solidly attached to the back-rest
• • 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
  • B60N2/897—Head-rests with sleeves located in the back-rest for guiding the rods of the head-rest
• • 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
  • B60N2002/899—Head-rests characterised by structural or mechanical details not otherwise provided for

Definitions

• the invention relates to a headrest of a motor vehicle seat. It is known to make a headrest of a motor vehicle seat, said headrest comprising:
• Two parallel lateral seat connection rods intended to be mounted at the top of the back of said seat, said rods being provided with locking notches emerging towards the front or towards the rear, "a casing made of molded plastic material for absorption of energy in case of impact of the head of a passenger on said headrest, said rods being slidably mounted in said housing,
• a device for locking said housing relative to said rods in a plurality of vertical positions, so as to allow height adjustment of said housing said device comprising two latches each provided with a locking pin, said latches being operable between a position locking, wherein each of said lugs engages in one of said respective notches, and an unlocking position, wherein said lugs are disengaged from said notches.
• the headrest further comprises a transverse unlocking bar, said bar being transversely slidably mounted in said housing so as to be operable between a locking configuration and an unlocking configuration, the locks being integrated. at said bar.
• the bar comprises two projections, generally molded one piece with it, said projections forming locking lugs.
• the insertion of the lugs in the notches is by a transverse sliding of said lugs. It can then happen, if the casing is squeezed when it is actuated to adjust its height, that one of the lugs is well positioned opposite one notch while the other is slightly offset in height, which causes difficulties in achieving the expected lock.
• the invention aims to overcome this disadvantage.
• the invention proposes a motor vehicle seat headrest, said headrest comprising:
• Two parallel lateral seat connection rods intended to be mounted at the top of the back of said seat, said rods being provided with locking notches opening towards the front or towards the rear,
• a device for locking said housing relative to said rods in a plurality of vertical positions, so as to allow height adjustment of said housing said device comprising two latches each provided with a locking pin, said latches being operable between a position locking, wherein each of said lugs engages in one of said respective notches, and an unlocking position, wherein said lugs are disengaged from said notches, said device further having the following characteristics:
• Said locks are slidably mounted longitudinally in said housing to move from one position to the other by being actuated towards their locking position by two respective springs, each of said latches being provided with a receiving face,
• transverse unlocking bar said bar: o being transversely slidably mounted in said housing so as to be operable between a locking configuration and an unlocking configuration
• each of said receiving faces so as to slide on when actuated from one configuration to another
• the insertion of the lugs into the corresponding notches, when locking the height of the housing is much easier than in a configuration where the notches are inserted laterally, and this even if the lugs are not not arranged strictly at the same height when locking.
• the notches in lateral view usually have an enlargement at the level of their opening towards the outside, said enlargement helping to insert the lugs in said notches even if one of the lugs is slightly offset in height with respect to the 'other.
• FIG. 1 is a schematic partial perspective view of a headrest according to a first embodiment
• FIG. 2 is a schematic partial perspective view of a locking device of the headrest of FIG. 1;
• FIG. 3 is a schematic view in partial vertical section of the headrest of the preceding figures, a lock being represented in the locking position,
• FIG. 4 is a schematic view in partial horizontal section of the headrest of the preceding figures in a first plane, the locks being in the locked position
• FIG. 5 is a view similar to that of FIG. 4, the section being made along a second plane parallel to the first,
• FIG. 6 is a view similar to that of FIG. 5, the latches being in the unlocking position
• FIG. 7 is a schematic partial perspective view of a locking device of a headrest according to a second embodiment
• Figures 8a and 8b are views in principle in partial horizontal section of a headrest provided with the locking device of Figure 7, the latches being in the locking position (8a) and unlocking (8b).
• a headrest 1 of a motor vehicle seat comprising:
• Two lateral parallel link rods 2 connected to the seat intended to be mounted at the top of the back of said seat, said rods being provided with locking notches 3 opening towards the front or towards the rear,
• a casing 4 made of molded plastic material for absorbing energy in the event of a head being hit by a passenger on said headrest, said rods being slidably mounted in said casing,
• a device for locking said housing relative to said rods in a plurality of vertical positions, so as to allow height adjustment of said housing said device comprising two latches each provided with a locking pin 6, said latches; being operable between a locking position, wherein each of said lugs engages in one of said respective notches, and an unlocking position, wherein said lugs are disengaged from said notches, said device further having the following characteristics:
• Said locks are slidably mounted longitudinally in said housing to move from one position to the other by being actuated towards their locking position by two respective springs 8, each of said locks being provided with a reception face 7,
• transverse unlocking bar 9 said bar:
• each of said receiving faces in sliding manner when it is actuated from one configuration to the other, being provided with an actuating surface cooperating with minus a complementary surface January 1, said surfaces being arranged so that the passage of said bar from its locking configuration to its unlocking configuration performs an actuation of said locks from their locking position to their unlocking position.
• the housing 4 is in particular covered with a support cushion.
• the headrest 1 further comprises a spring 12 for returning the bar 9 to its locking configuration.
• the headrest 1 further comprises a push button 13 mounted in transverse translation on the casing 4 at the end 19 of the bar 9 so as to allow actuation of said bar from its locking configuration to its configuration of unlocking.
• the latches 5 are based on molded plastic material, said latches each incorporating a metal molded reinforcement plate 14 extending facing the lugs 6.
• the notches 3 open towards the front, which makes it possible to guarantee, under the effect of a force applied towards the rear by the head of the occupant of the seat, the application of a constraint facilitating the insertion of the locking lugs 6 into the notches 3.
• the bar 9 is further mounted so as to be able to debate longitudinally between the front and rear stops 16 provided in the casing 4,
• the headrest comprises two complementary surfaces 1 1 formed by a portion of the outer face of each of the rods 2,
• the operating surface 10 is, in a top view, in the form of a line 17 provided with two notches 18 arranged to: receive said rods when said bar is in a locking configuration
• the receiving surfaces 7 have two complementary surfaces 1 1 forming two cam followers, the actuating surface 10 forming a cam having, in a top view, two portions inclined by 20 relative to a transverse direction, said parts being arranged so as to:
• the parts 20 in high view are straight, knowing that, not shown, we can consider giving them a different geometry, including curved.
• the bar 9 bears against the actuating surface 10 on the rods 2.
• the bar 9 can in this case be supported on the housing 4 by means of a reinforcement piece, not shown, associated with said housing, said part being in particular based on a plastic material that is not very sensitive to expansion. when subjected to temperature differences, for example a polyoxymethylene or a polyamide.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=58054252

Family Applications (1)

Country Status (3)

Family Cites Families (3)

• 2016
  • 2016-11-22 FR FR1661361A patent/FR3058957B1/fr active Active
• 2017
  • 2017-11-21 WO PCT/FR2017/053196 patent/WO2018096256A1/fr unknown
  • 2017-11-21 EP EP17811646.3A patent/EP3544853A1/de active Pending

Also Published As

Similar Documents

Legal Events