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

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 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 a height adjustment of said housing said device comprising a transverse bar slidably mounted in said housing, said bar being provided with two lateral lugs; locking, said bar being operable between a locking position, wherein said lugs each fit into a notch of a respective rod, and an unlocking position, wherein said lugs disengage laterally from said notches, said bar being biased towards its locking position by a spring means.
• 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 casing with respect to said rods in a plurality of vertical positions, so as to allow height adjustment of said casing said device comprising a transverse bar slidably mounted in said casing, said bar being provided with two lateral lugs locking, said bar being operable between a locking position, wherein said lugs each fit into a notch of a respective rod, and an unlocking position, wherein said lugs disengage laterally from said notches, said bar being biased towards its locking position by a spring means,
• Said bar is slidably mounted on said housing by means of two lateral bearings, said bearings being mounted on said housing so as to be able to debate longitudinally,
• Said bearings are constrained by two respective springs actuating them so as to push said bar towards said rods to force the insertion of said lugs into the corresponding notches when said bar is in the locking position.
• the terms of positioning in the space (high, longitudinal, transverse, lateral, front, rear, vertical, ...) are taken with reference to the headrest disposed in use situation in the vehicle . With the proposed arrangement, it ensures a perfect insertion of the lugs in the locking notches.
• the dimensional dispersions of the various components and / or the dimensional variations that they may present as a result of temperature variations, leading to a retraction or expansion of their constituent materials, are rendered inoperative because the bearings are constrained by two respective springs actuating them so as to push the bar towards the rods, which has the effect of forcing the insertion of the lugs in the corresponding notches when the bar is in the locking position.
• FIG. 1 is a partial perspective view of a headrest according to one embodiment
• FIG. 2 is a partial horizontal sectional view of the headrest of the preceding figure
• FIG. 3 is a partial vertical sectional view of the headrest of the preceding figures
• Figure 4 is a perspective view of the locking device of the headrest of the preceding figures.
• 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 energy absorption in the event of a head being hit by a passenger on said headrest, said rods being slidably mounted in said casing, said casing being covered by a cushion of headrest, not shown,
• a device for locking said housing relative to said rods in a plurality of vertical positions, so as to allow a height adjustment of said housing said device comprising a transverse rod slidably mounted in said housing, said bar being provided with two lugs lateral locking, said bar being operable between a locking position, wherein said lugs each fit into a notch 3 of a respective rod 2, and an unlocking position, wherein said lugs are released laterally from said notches, said bar being recalled to its locking position by spring means 8,
• Said bar is slidably mounted on said housing by means of two lateral bearings 9, said bearings being mounted on said housing so as to be able to debate longitudinally,
• Said bearings are constrained by two respective springs 10 actuating them so as to push said bar towards said rods to force the insertion of said lugs into the corresponding notches 3 when said bar is in the locking position.
• the lugs 6 are derived from metal plates 1 1 overmolded by the bar 5, said bar being based on molded plastic material.
• the lugs 6 seen from above have a convex shape to facilitate their insertion into the notches 3 by sliding effect.
• the housing 4 is provided with front and rear internal stops 12 delimiting a sliding space of the bar 5 between the bearings 9 so as to allow longitudinal retention of said bar.
• the stops 12 are in the form of ribs.
• stops 12 ensures a general longitudinal retention of the bar 5 in substantially nominal position, knowing that they could not be sufficient to ensure, for the reasons explained above, a perfect insertion of the lugs 6 in the notches 3 locking.
• the bearings 9 are in the form of blocks 13 comprising an orifice 14 for receiving the bar 5.
• the bearings 6 have a top view of a general U shape between the branches 15 of which the rods 2 are inserted.
• the bearings 9 are arranged facing the rods 2, which allows, insofar as the springs 10 are, therefore, also arranged opposite said rods, to optimize the force applied to the pins 6 to insert them into the notches 3.
• 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 promoting the insertion of the lugs 6 in the locking notches 3.
• the bar 5 is actuated in unlocking by a push button 7.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=57583190

Family Applications (1)

Country Status (3)

Family Cites Families (3)

• 2016
  • 2016-07-28 FR FR1657306A patent/FR3054502B1/fr active Active
• 2017
  • 2017-07-27 EP EP17754759.3A patent/EP3490841A1/de not_active Withdrawn
  • 2017-07-27 WO PCT/FR2017/052122 patent/WO2018020179A1/fr unknown

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