• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a headrest (1) for a motor vehicle seat, said headrest comprising: two rods (2), a housing (3) comprising two conduits for receiving said sliding rods and two sets of bearings each comprising a high and a low bearing (7), each of said sets being mounted in a respective conduit by interlocking said bearings in high and low housings (9) provided in said housing, the front face (11) of said low bearings being in contact with the free end of ribs (12) protruding rearward, said ribs being molded from said housing, said ribs having a thickness arranged to allow them to deform plastically in the event of a violent impact applied by the head of said passenger on said support face and release an additional space (13) for insertion of said low bearings in said housing so as to prevent their extraction.
    公开号:FR3063689A1
    申请号:FR1752014
    申请日:2017-03-13
    公开日:2018-09-14
    发明作者:Laurent Georges
    申请人:Cera TSC；
    IPC主号:
    专利说明:

    (57) The invention relates to a headrest (1) of a motor vehicle seat, said headrest comprising: two rods (2), a housing (3) comprising two ducts for receiving said sliding rods and two sets of bearings each comprising a high bearing and a low bearing (7), each of said sets being mounted in a respective conduit by fitting said bearings into high and low housings (9) provided in said housing, the front face (11) of said low bearings being in contact with the free end of ribs (12) projecting towards the rear, said ribs being obtained from molding of said housing, said ribs having a thickness arranged to allow them to deform plastically in the event of a violent impact applied by the head said passenger on said bearing face and freeing up an additional space (13) for inserting said low bearings in said housing so as to prevent their extraction.
    1.3
    3.5
    pr /or ——12 -7.9 (—1 V 14


    The invention relates to a headrest for a motor vehicle seat.
    It is known to produce a headrest for a motor vehicle seat, said headrest comprising:
    • two parallel rods connecting to the seat intended to be mounted at the top of the back of said seat, • a casing made of molded plastic material for absorbing energy in the event of an impact by the head of a passenger on said headrest, said case comprising two conduits for receiving said sliding rods, said case having a bearing face intended to be filled by a cushion, • two sets of bearings each comprising a high bearing and a low bearing, each of said sets being mounted in a conduit respective by fitting said bearings into high and low housings provided in said housing, said housings being arranged so as to allow transverse movement of said bearings on either side of a nominal position, said bearings being provided with an orifice sliding reception of the corresponding rod, • a device for locking said casing with respect to said rods in a plurality vertical positions, so as to allow a height adjustment of said housing.
    With known arrangements, the low bearings are generally inserted in low housings which are open downwards, this for reasons of facilitating their mounting.
    It follows that, in the event of a violent impact from the head of the passenger on the housing, there is a risk of extraction of the bottom bearings of their housings, with the consequence that said housing is no longer correctly associated with the rods, which constitutes a risk for said passenger.
    The object of the invention is to overcome this drawback.
    To this end, the invention provides a headrest for a motor vehicle seat, said headrest comprising:
    • two parallel rods connecting to the seat intended to be mounted at the top of the back of said seat, • a casing made of molded plastic material for absorbing energy in the event of an impact by the head of a passenger on said headrest, said housing comprising two conduits for receiving said sliding rods, said housing having a bearing face intended to be filled by a cushion, • two sets of bearings each comprising a high bearing and a low bearing, each of said games being mounted in a conduit respective by fitting said bearings into high and low housings provided in said housing, said housings being arranged so as to allow transverse movement of said bearings on either side of a nominal position, said bearings being provided with an orifice sliding reception of the corresponding rod, • a device for locking said housing relative to said rods in a plural ity of vertical positions, so as to allow an adjustment in height of said housing, the front face of said low bearings being in contact with the free end of ribs projecting towards the rear, said ribs being produced by molding of said housing, said ribs having a thickness arranged to allow them to deform plastically in the event of a violent shock applied by the head of said passenger on said bearing face and to release an additional space for insertion of said low bearings in said housing so as to prevent their extraction.
    In this description, the terms of positioning in space (top, bottom, longitudinal, transverse, lateral, horizontal, front, rear, vertical, ...) are taken with reference to a headrest mounted in the vehicle.
    With the proposed arrangement, in the event of a violent impact from the passenger's head on the housing, the ribs are plastically deformed to release the additional space mentioned above in which the low bearings are inserted so as to prevent their extraction, this which makes it possible to secure the association between the housing and the rods, with the positive consequences which result therefrom for the passenger in terms of safety.
    Other features and advantages of the invention will appear in the following description, made with reference to the attached figures, in which:
    • Figure 1 is a schematic partial perspective view of an appuitête according to one embodiment, • Figures 2a and 2b are schematic views in horizontal section of the headrest of Figure 1 made at the level of the low bearings before impact violent head of a passenger on the housing (Figure 2a) and after said impact (Figure 2b), • Figure 3 is an enlarged detail of Figure 2a.
    With reference to the figures, a headrest 1 of a motor vehicle seat is described, said headrest comprising:
    • two parallel rods 2 connecting to the seat intended to be mounted at the top of the back of said seat, • a casing 3 made of molded plastic material - in particular high density polyethylene - for absorbing energy in the event of a head impact a passenger on said headrest, said housing comprising two conduits 4 for receiving said sliding rods, said housing having a support face 5 intended to be furnished with a cushion, • two sets of bearings each comprising a high bearing 6 and a low bearing 7, each of said sets being mounted in a respective duct by fitting said bearings into high 8 and low 9 housings provided in said housing, said housings being arranged so as to allow transverse movement of said bearings on either side from a nominal position, said bearings being provided with an orifice 10 for sliding reception of the corresponding rod 2, • a worm device rusting of said housing relative to said rods in a plurality of vertical positions, so as to allow height adjustment of said housing, the front face 11 of said bottom bearings being in contact with the free end of ribs 12 projecting rearward, said ribs being obtained from molding of said housing, said ribs having a thickness arranged to allow them to deform plastically - in particular by penetration of said bearings in said ribs - in the event of a violent impact applied by the head of said passenger on said bearing face and freeing an additional space 13 for inserting said bottom bearings in said housing so as to prevent their extraction.
    According to the embodiment shown, the ribs 12 are in the general form of flat strips.
    According to the embodiment shown, the ribs 12 extend parallel to a vertical longitudinal plane.
    According to one embodiment, the ribs 12 have a thickness of less than 1.5 mm, so that they can deform in the event of an impact in order to free up the additional space 13.
    According to one embodiment, the ribs 12 project at least 5 mm, in particular approximately 7 mm, so as to allow the release of an additional space 13 of sufficient volume to prevent the extraction of the bottom bearings 7 from the housing 3 .
    According to the embodiment shown, the ribs 12 are two in number per bottom housing 9, the ends of said ribs being positioned laterally on either side of the front face 11 of the corresponding bottom bearing 7.
    According to the embodiment shown, the bearings 6,7 are made of molded plastic material - in particular polyoxymethylene - and are provided with elastic side tabs 14 formed by molding, said tabs bearing on the side walls of the housings 8,9 so as to allow a transverse centering of said bearings in said housings.
    Such an arrangement allows a suitable positioning of the bearings 6,7 with respect to the rods 2 whatever the transverse dimensional variations of the case 3 linked to the temperature variations.
    According to an embodiment not shown in the figures, at least one of the rods 2 is provided with locking notches, the locking device comprising at least one locking projection mounted movably relative to the housing 3 between a locking position, where said projection is inserted into one of said notches, and an unlocking position, where said projection is withdrawn from said notch in order to release the sliding of the corresponding rod,
    In particular, the two rods 2 can be provided with locking notches, the locking device comprising a cross member mounted in transverse sliding in the housing 3, said cross member comprising two locking projections, said cross member being provided on one of its ends. a push button 15 enabling it to be actuated from a locking position, where said projections each insert into a corresponding notch of rod 2, towards an unlocking position, where said projections withdraw from said notches, the headrest 1 being further provided with a return spring from said crosspiece to its locking position.
    According to one embodiment, the locking notches are in the form of notches opening out towards the front, which allows an accentuated locking in the event of an impact of the head of a passenger on the housing 3.
    权利要求:
    Claims (7)
    [1" id="c-fr-0001]
    1. Headrest (1) of a motor vehicle seat, said headrest comprising:
    • two parallel rods (2) connecting to the seat intended to be mounted at the top of the back of the said seat, • a casing (3) made of molded plastic material for absorbing energy in the event of a passenger's head impact on said headrest, said housing comprising two conduits (4) for receiving said sliding rods, said housing having a support face (5) intended to be furnished with a cushion, • two sets of bearings each comprising a high bearing ( 6) and a low bearing (7), each of said sets being mounted in a respective conduit (4) by fitting said bearings into high (8) and low (9) housings provided in said housing, said housings being arranged so as to allow transverse movement of said bearings on either side of a nominal position, said bearings being provided with an orifice (10) for sliding reception of the corresponding rod, • a device for locking said housing by rap port to said rods in a plurality of vertical positions, so as to allow height adjustment of said housing, said headrest being characterized in that the front face (11) of said low bearings is in contact with the free end of ribs ( 12) protruding rearward, said ribs being from molding of said housing, said ribs having a thickness arranged to allow them to deform plastically in the event of a violent impact applied by the head of said passenger on said bearing face and release a additional space (13) for inserting said bottom bearings in said housing so as to prevent their extraction.
    [2" id="c-fr-0002]
    2. Headrest according to claim 1, characterized in that the ribs (12) are in the general form of flat strips.
    [3" id="c-fr-0003]
    3. Headrest according to claim 2, characterized in that the ribs (12) extend parallel to a vertical longitudinal plane.
    [4" id="c-fr-0004]
    4. Headrest according to any one of claims 1 to 3, characterized in that the ribs (12) have a thickness less than 1.5 mm.
    [5" id="c-fr-0005]
    5 5. headrest according to any one of claims 1 to 4, characterized in that the ribs (12) protrude by at least 5 mm, so as to allow the release of an additional space (13) of sufficient volume to prevent extraction of the bottom bearings (7) from the housing (3).
    [6" id="c-fr-0006]
    10 6. headrest according to any one of claims 1 to 5, characterized in that the ribs (12) are two in number per bottom housing (9), the ends of said ribs being positioned laterally on either side other of the front face (11) of the corresponding lower bearing (7).
    [7" id="c-fr-0007]
    15 7. Headrest according to any one of claims 1 to 6, characterized in that the bearings (6,7) are made of molded plastic material and are provided with lateral tabs (14) resilient from molding, said tabs taking support on the side walls of the housings (8, 9), so as to allow transverse centering of said bearings in said housings.
    13 3.5 ^ 12 -7.9 -14 A___J
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    类似技术:
    公开号 | 公开日 | 专利标题
    FR3063689A1|2018-09-14|HEADREST FOR THE SEAT OF A MOTOR VEHICLE
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    FR2978389A1|2013-02-01|Device for locking metallic rod associated with headrest at backrest of seat of car, has recess including side walls arranged to allow anchoring of block in recess relative to effort exerted on block upward or downward
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    FR3088595A1|2020-05-22|MOTOR VEHICLE SEAT SUPPORT
    EP2774806B1|2016-04-06|Device for preventing the sliding of a ring-threaded shank for combining a headrest with a backrest of an automobile seat
    FR3006953A1|2014-12-19|DEVICE FOR MOUNTING A HEADREST ON A SEAT BACK OF A MOTOR VEHICLE
    FR3041297A1|2017-03-24|HEADREST FOR THE SEAT OF A MOTOR VEHICLE
    FR3103753A1|2021-06-04|Motor vehicle seat headrest
    FR3100761A1|2021-03-19|Motor vehicle seat headrest
    同族专利:
    公开号 | 公开日
    FR3063689B1|2019-05-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20060250017A1|2005-04-28|2006-11-09|Grammar Automotive Gmbh|Headrest for vehicle seats|
    US20110006578A1|2009-07-07|2011-01-13|Lear Corporation|Adjustable head restraint assembly for vehicle seats|
    US20130049430A1|2011-03-28|2013-02-28|Lear Corporation|Height adjustable head restraints for vehicle seats|
    FR3020606A1|2014-04-30|2015-11-06|Peugeot Citroen Automobiles Sa|LOWER-HOLES VEHICLE SEAT BACK FOLDER FRAME ADJUSTED TO THE PROGRAMMED ROTATION OF HEADREST ROD GUIDES IN THE EVENT OF REAR IMPACT|FR3088595A1|2018-11-16|2020-05-22|Tesca France|MOTOR VEHICLE SEAT SUPPORT|
    EP3708425A1|2019-03-12|2020-09-16|TESCA France|Headrest for a motor vehicle seat|
    FR3101033A1|2019-09-24|2021-03-26|Tesca France|Motor vehicle seat headrest|
    EP3932734A1|2020-07-02|2022-01-05|TESCA France|Headrest for a motor vehicle seat|
    法律状态:
    2018-03-30| PLFP| Fee payment|Year of fee payment: 2 |
    2018-09-14| PLSC| Search report ready|Effective date: 20180914 |
    2020-03-30| PLFP| Fee payment|Year of fee payment: 4 |
    2021-03-29| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1752014|2017-03-13|
    FR1752014A|FR3063689B1|2017-03-13|2017-03-13|HEADREST FOR THE SEAT OF A MOTOR VEHICLE|FR1752014A| FR3063689B1|2017-03-13|2017-03-13|HEADREST FOR THE SEAT OF A MOTOR VEHICLE|
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